14887Schin /*********************************************************************** 24887Schin * * 34887Schin * This software is part of the ast package * 48462SApril.Chin@Sun.COM * Copyright (c) 1982-2008 AT&T Intellectual Property * 54887Schin * and is licensed under the * 64887Schin * Common Public License, Version 1.0 * 78462SApril.Chin@Sun.COM * by AT&T Intellectual Property * 84887Schin * * 94887Schin * A copy of the License is available at * 104887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 114887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 124887Schin * * 134887Schin * Information and Software Systems Research * 144887Schin * AT&T Research * 154887Schin * Florham Park NJ * 164887Schin * * 174887Schin * David Korn <dgk@research.att.com> * 184887Schin * * 194887Schin ***********************************************************************/ 204887Schin #pragma prototyped 214887Schin /* 224887Schin * UNIX shell parse tree executer 234887Schin * 244887Schin * David Korn 254887Schin * AT&T Labs 264887Schin * 274887Schin */ 284887Schin 294887Schin #include "defs.h" 304887Schin #include <fcin.h> 314887Schin #include "variables.h" 324887Schin #include "path.h" 334887Schin #include "name.h" 344887Schin #include "io.h" 354887Schin #include "shnodes.h" 364887Schin #include "jobs.h" 374887Schin #include "test.h" 384887Schin #include "builtins.h" 394887Schin #include "FEATURE/time" 404887Schin #include "FEATURE/externs" 414887Schin #include "FEATURE/locale" 424887Schin #include "streval.h" 434887Schin 444887Schin #if !_std_malloc 454887Schin # include <vmalloc.h> 464887Schin #endif 474887Schin 488462SApril.Chin@Sun.COM #if _lib_vfork 498462SApril.Chin@Sun.COM # include <ast_vfork.h> 508462SApril.Chin@Sun.COM #else 518462SApril.Chin@Sun.COM # define vfork() fork() 528462SApril.Chin@Sun.COM #endif 538462SApril.Chin@Sun.COM 544887Schin #define SH_NTFORK SH_TIMING 554887Schin 564887Schin #if _lib_nice 574887Schin extern int nice(int); 584887Schin #endif /* _lib_nice */ 594887Schin #if !_lib_spawnveg 604887Schin # define spawnveg(a,b,c,d) spawnve(a,b,c) 614887Schin #endif /* !_lib_spawnveg */ 624887Schin #if SHOPT_SPAWN 638462SApril.Chin@Sun.COM static pid_t sh_ntfork(Shell_t*,const Shnode_t*,char*[],int*,int); 644887Schin #endif /* SHOPT_SPAWN */ 654887Schin 668462SApril.Chin@Sun.COM static void sh_funct(Shell_t *,Namval_t*, int, char*[], struct argnod*,int); 674887Schin static int trim_eq(const char*, const char*); 688462SApril.Chin@Sun.COM static void coproc_init(Shell_t*, int pipes[]); 694887Schin 704887Schin static void *timeout; 714887Schin static char pipejob; 724887Schin 734887Schin struct funenv 744887Schin { 754887Schin Namval_t *node; 764887Schin struct argnod *env; 774887Schin }; 784887Schin 794887Schin /* ======== command execution ========*/ 804887Schin 814887Schin /* 824887Schin * print time <t> in h:m:s format with precision <p> 834887Schin */ 844887Schin static void l_time(Sfio_t *outfile,register clock_t t,int p) 854887Schin { 864887Schin register int min, sec, frac; 874887Schin register int hr; 884887Schin if(p) 894887Schin { 904887Schin frac = t%sh.lim.clk_tck; 914887Schin frac = (frac*100)/sh.lim.clk_tck; 924887Schin } 934887Schin t /= sh.lim.clk_tck; 944887Schin sec = t%60; 954887Schin t /= 60; 964887Schin min = t%60; 974887Schin if(hr=t/60) 984887Schin sfprintf(outfile,"%dh",hr); 994887Schin if(p) 1004887Schin sfprintf(outfile,"%dm%d%c%0*ds",min,sec,GETDECIMAL(0),p,frac); 1014887Schin else 1024887Schin sfprintf(outfile,"%dm%ds",min,sec); 1034887Schin } 1044887Schin 1058462SApril.Chin@Sun.COM static int p_time(Shell_t *shp, Sfio_t *out, const char *format, clock_t *tm) 1064887Schin { 1078462SApril.Chin@Sun.COM int c,p,l,n,offset = staktell(); 1088462SApril.Chin@Sun.COM const char *first; 1098462SApril.Chin@Sun.COM double d; 1108462SApril.Chin@Sun.COM Stk_t *stkp = shp->stk; 1114887Schin for(first=format ; c= *format; format++) 1124887Schin { 1134887Schin if(c!='%') 1144887Schin continue; 1158462SApril.Chin@Sun.COM sfwrite(stkp, first, format-first); 1164887Schin n = l = 0; 1174887Schin p = 3; 1184887Schin if((c= *++format) == '%') 1194887Schin { 1204887Schin first = format; 1214887Schin continue; 1224887Schin } 1234887Schin if(c>='0' && c <='9') 1244887Schin { 1254887Schin p = (c>'3')?3:(c-'0'); 1264887Schin c = *++format; 1274887Schin } 1284887Schin else if(c=='P') 1294887Schin { 1304887Schin if(d=tm[0]) 1314887Schin d = 100.*(((double)(tm[1]+tm[2]))/d); 1324887Schin p = 2; 1334887Schin goto skip; 1344887Schin } 1354887Schin if(c=='l') 1364887Schin { 1374887Schin l = 1; 1384887Schin c = *++format; 1394887Schin } 1404887Schin if(c=='U') 1414887Schin n = 1; 1424887Schin else if(c=='S') 1434887Schin n = 2; 1444887Schin else if(c!='R') 1454887Schin { 1468462SApril.Chin@Sun.COM stkseek(stkp,offset); 1474887Schin errormsg(SH_DICT,ERROR_exit(0),e_badtformat,c); 1484887Schin return(0); 1494887Schin } 1504887Schin d = (double)tm[n]/sh.lim.clk_tck; 1514887Schin skip: 1524887Schin if(l) 1538462SApril.Chin@Sun.COM l_time(stkp, tm[n], p); 1544887Schin else 1558462SApril.Chin@Sun.COM sfprintf(stkp,"%.*f",p, d); 1564887Schin first = format+1; 1574887Schin } 1584887Schin if(format>first) 1598462SApril.Chin@Sun.COM sfwrite(stkp,first, format-first); 1608462SApril.Chin@Sun.COM sfputc(stkp,'\n'); 1618462SApril.Chin@Sun.COM n = stktell(stkp)-offset; 1628462SApril.Chin@Sun.COM sfwrite(out,stkptr(stkp,offset),n); 1638462SApril.Chin@Sun.COM stkseek(stkp,offset); 1644887Schin return(n); 1654887Schin } 1664887Schin 1674887Schin #if SHOPT_OPTIMIZE 1684887Schin /* 1694887Schin * clear argument pointers that point into the stack 1704887Schin */ 1714887Schin static int p_arg(struct argnod*,int); 1724887Schin static int p_switch(struct regnod*); 1734887Schin static int p_comarg(register struct comnod *com) 1744887Schin { 1754887Schin Namval_t *np=com->comnamp; 1764887Schin int n = p_arg(com->comset,ARG_ASSIGN); 1774887Schin if(com->comarg && (com->comtyp&COMSCAN)) 1784887Schin n+= p_arg(com->comarg,0); 1794887Schin if(com->comstate && np) 1804887Schin { 1814887Schin /* call builtin to cleanup state */ 1828462SApril.Chin@Sun.COM Shbltin_t *bp = &sh.bltindata; 1838462SApril.Chin@Sun.COM void *save_ptr = bp->ptr; 1848462SApril.Chin@Sun.COM void *save_data = bp->data; 1858462SApril.Chin@Sun.COM bp->bnode = np; 1868462SApril.Chin@Sun.COM bp->vnode = com->comnamq; 1878462SApril.Chin@Sun.COM bp->ptr = nv_context(np); 1888462SApril.Chin@Sun.COM bp->data = com->comstate; 1898462SApril.Chin@Sun.COM bp->flags = SH_END_OPTIM; 1908462SApril.Chin@Sun.COM (*funptr(np))(0,(char**)0, bp); 1918462SApril.Chin@Sun.COM bp->ptr = save_ptr; 1928462SApril.Chin@Sun.COM bp->data = save_data; 1934887Schin } 1944887Schin com->comstate = 0; 1954887Schin if(com->comarg && !np) 1964887Schin n++; 1974887Schin return(n); 1984887Schin } 1994887Schin 2004887Schin extern void sh_optclear(Shell_t*, void*); 2014887Schin 2024887Schin static int sh_tclear(register Shnode_t *t) 2034887Schin { 2044887Schin int n=0; 2054887Schin if(!t) 2064887Schin return(0); 2074887Schin switch(t->tre.tretyp&COMMSK) 2084887Schin { 2094887Schin case TTIME: 2104887Schin case TPAR: 2114887Schin return(sh_tclear(t->par.partre)); 2124887Schin case TCOM: 2134887Schin return(p_comarg((struct comnod*)t)); 2144887Schin case TSETIO: 2154887Schin case TFORK: 2164887Schin return(sh_tclear(t->fork.forktre)); 2174887Schin case TIF: 2184887Schin n=sh_tclear(t->if_.iftre); 2194887Schin n+=sh_tclear(t->if_.thtre); 2204887Schin n+=sh_tclear(t->if_.eltre); 2214887Schin return(n); 2224887Schin case TWH: 2234887Schin if(t->wh.whinc) 2244887Schin n=sh_tclear((Shnode_t*)(t->wh.whinc)); 2254887Schin n+=sh_tclear(t->wh.whtre); 2264887Schin n+=sh_tclear(t->wh.dotre); 2274887Schin return(n); 2284887Schin case TLST: 2294887Schin case TAND: 2304887Schin case TORF: 2314887Schin case TFIL: 2324887Schin n=sh_tclear(t->lst.lstlef); 2334887Schin return(n+sh_tclear(t->lst.lstrit)); 2344887Schin case TARITH: 2354887Schin return(p_arg(t->ar.arexpr,ARG_ARITH)); 2364887Schin case TFOR: 2374887Schin n=sh_tclear(t->for_.fortre); 2384887Schin return(n+sh_tclear((Shnode_t*)t->for_.forlst)); 2394887Schin case TSW: 2404887Schin n=p_arg(t->sw.swarg,0); 2414887Schin return(n+p_switch(t->sw.swlst)); 2424887Schin case TFUN: 2434887Schin n=sh_tclear(t->funct.functtre); 2444887Schin return(n+sh_tclear((Shnode_t*)t->funct.functargs)); 2454887Schin case TTST: 2464887Schin if((t->tre.tretyp&TPAREN)==TPAREN) 2474887Schin return(sh_tclear(t->lst.lstlef)); 2484887Schin else 2494887Schin { 2504887Schin n=p_arg(&(t->lst.lstlef->arg),0); 2514887Schin if(t->tre.tretyp&TBINARY) 2524887Schin n+=p_arg(&(t->lst.lstrit->arg),0); 2534887Schin } 2544887Schin } 2554887Schin return(n); 2564887Schin } 2574887Schin 2584887Schin static int p_arg(register struct argnod *arg,int flag) 2594887Schin { 2604887Schin while(arg) 2614887Schin { 2624887Schin if(strlen(arg->argval) || (arg->argflag==ARG_RAW)) 2634887Schin arg->argchn.ap = 0; 2644887Schin else if(flag==0) 2654887Schin sh_tclear((Shnode_t*)arg->argchn.ap); 2664887Schin else 2674887Schin sh_tclear(((struct fornod*)arg->argchn.ap)->fortre); 2684887Schin arg = arg->argnxt.ap; 2694887Schin } 2704887Schin return(0); 2714887Schin } 2724887Schin 2734887Schin static int p_switch(register struct regnod *reg) 2744887Schin { 2754887Schin int n=0; 2764887Schin while(reg) 2774887Schin { 2784887Schin n+=p_arg(reg->regptr,0); 2794887Schin n+=sh_tclear(reg->regcom); 2804887Schin reg = reg->regnxt; 2814887Schin } 2824887Schin return(n); 2834887Schin } 2844887Schin # define OPTIMIZE_FLAG (ARG_OPTIMIZE) 2854887Schin # define OPTIMIZE (flags&OPTIMIZE_FLAG) 2864887Schin #else 2874887Schin # define OPTIMIZE_FLAG (0) 2884887Schin # define OPTIMIZE (0) 2894887Schin # define sh_tclear(x) 2904887Schin #endif /* SHOPT_OPTIMIZE */ 2914887Schin 2924887Schin static void out_pattern(Sfio_t *iop, register const char *cp, int n) 2934887Schin { 2944887Schin register int c; 2954887Schin do 2964887Schin { 2974887Schin switch(c= *cp) 2984887Schin { 2994887Schin case 0: 3004887Schin if(n<0) 3014887Schin return; 3024887Schin c = n; 3034887Schin break; 3044887Schin case '\n': 3054887Schin sfputr(iop,"$'\\n",'\''); 3064887Schin continue; 3074887Schin case '\\': 3084887Schin if (!(c = *++cp)) 3094887Schin c = '\\'; 3104887Schin /*FALLTHROUGH*/ 3114887Schin case ' ': 3124887Schin case '<': case '>': case ';': 3134887Schin case '$': case '`': case '\t': 3144887Schin sfputc(iop,'\\'); 3154887Schin break; 3164887Schin } 3174887Schin sfputc(iop,c); 3184887Schin } 3194887Schin while(*cp++); 3204887Schin } 3214887Schin 3224887Schin static void out_string(Sfio_t *iop, register const char *cp, int c, int quoted) 3234887Schin { 3244887Schin if(quoted) 3254887Schin { 3268462SApril.Chin@Sun.COM int n = stktell(stkstd); 3274887Schin cp = sh_fmtq(cp); 3284887Schin if(iop==stkstd && cp==stkptr(stkstd,n)) 3294887Schin { 3304887Schin *stkptr(stkstd,stktell(stkstd)-1) = c; 3314887Schin return; 3324887Schin } 3334887Schin } 3344887Schin sfputr(iop,cp,c); 3354887Schin } 3364887Schin 3374887Schin struct Level 3384887Schin { 3394887Schin Namfun_t hdr; 3404887Schin short maxlevel; 3414887Schin }; 3424887Schin 3434887Schin /* 3444887Schin * this is for a debugger but it hasn't been tested yet 3454887Schin * if a debug script sets .sh.level it should set up the scope 3464887Schin * as if you were executing in that level 3474887Schin */ 3484887Schin static void put_level(Namval_t* np,const char *val,int flags,Namfun_t *fp) 3494887Schin { 3504887Schin Shscope_t *sp; 3514887Schin struct Level *lp = (struct Level*)fp; 3524887Schin int16_t level, oldlevel = (int16_t)nv_getnum(np); 3534887Schin nv_putv(np,val,flags,fp); 3548462SApril.Chin@Sun.COM if(!val) 3558462SApril.Chin@Sun.COM return; 3564887Schin level = nv_getnum(np); 3574887Schin if(level<0 || level > lp->maxlevel) 3584887Schin { 3598462SApril.Chin@Sun.COM nv_putv(np, (char*)&oldlevel, NV_INT16, fp); 3604887Schin /* perhaps this should be an error */ 3614887Schin return; 3624887Schin } 3634887Schin if(level==oldlevel) 3644887Schin return; 3654887Schin if(sp = sh_getscope(level,SEEK_SET)) 3664887Schin { 3678462SApril.Chin@Sun.COM sh_setscope(sp); 3688462SApril.Chin@Sun.COM error_info.id = sp->cmdname; 3698462SApril.Chin@Sun.COM 3704887Schin } 3714887Schin } 3724887Schin 3738462SApril.Chin@Sun.COM static const Namdisc_t level_disc = { sizeof(struct Level), put_level }; 3748462SApril.Chin@Sun.COM 3758462SApril.Chin@Sun.COM static struct Level *init_level(int level) 3768462SApril.Chin@Sun.COM { 3778462SApril.Chin@Sun.COM struct Level *lp = newof(NiL,struct Level,1,0); 3788462SApril.Chin@Sun.COM lp->maxlevel = level; 3798462SApril.Chin@Sun.COM _nv_unset(SH_LEVELNOD,0); 3808462SApril.Chin@Sun.COM nv_onattr(SH_LEVELNOD,NV_INT16|NV_NOFREE); 3818462SApril.Chin@Sun.COM nv_putval(SH_LEVELNOD,(char*)&lp->maxlevel,NV_INT16); 3828462SApril.Chin@Sun.COM lp->hdr.disc = &level_disc; 3838462SApril.Chin@Sun.COM nv_disc(SH_LEVELNOD,&lp->hdr,NV_FIRST); 3848462SApril.Chin@Sun.COM return(lp); 3858462SApril.Chin@Sun.COM } 3864887Schin 3874887Schin /* 3884887Schin * write the current common on the stack and make it available as .sh.command 3894887Schin */ 3908462SApril.Chin@Sun.COM int sh_debug(Shell_t *shp, const char *trap, const char *name, const char *subscript, char *const argv[], int flags) 3914887Schin { 3928462SApril.Chin@Sun.COM Stk_t *stkp=shp->stk; 3934887Schin struct sh_scoped savst; 3944887Schin Namval_t *np = SH_COMMANDNOD; 3958462SApril.Chin@Sun.COM char *sav = stkptr(stkp,0); 3968462SApril.Chin@Sun.COM int n=4, offset=stktell(stkp); 3974887Schin const char *cp = "+=( "; 3984887Schin Sfio_t *iop = stkstd; 3998462SApril.Chin@Sun.COM short level; 4008462SApril.Chin@Sun.COM if(shp->indebug) 4018462SApril.Chin@Sun.COM return(0); 4028462SApril.Chin@Sun.COM shp->indebug = 1; 4034887Schin if(name) 4044887Schin { 4054887Schin sfputr(iop,name,-1); 4064887Schin if(subscript) 4074887Schin { 4084887Schin sfputc(iop,'['); 4094887Schin out_string(iop,subscript,']',1); 4104887Schin } 4114887Schin if(!(flags&ARG_APPEND)) 4124887Schin cp+=1, n-=1; 4134887Schin if(!(flags&ARG_ASSIGN)) 4144887Schin n -= 2; 4154887Schin sfwrite(iop,cp,n); 4164887Schin } 4174887Schin if(!(flags&ARG_RAW)) 4184887Schin out_string(iop, *argv++,' ', 0); 4194887Schin n = (flags&ARG_ARITH); 4204887Schin while(cp = *argv++) 4214887Schin { 4224887Schin if((flags&ARG_EXP) && argv[1]==0) 4234887Schin out_pattern(iop, cp,' '); 4244887Schin else 4254887Schin out_string(iop, cp,' ',n?0: (flags&(ARG_RAW|ARG_NOGLOB))||*argv); 4264887Schin } 4274887Schin if(flags&ARG_ASSIGN) 4284887Schin sfputc(iop,')'); 4294887Schin else if(iop==stkstd) 4308462SApril.Chin@Sun.COM *stkptr(stkp,stktell(stkp)-1) = 0; 4318462SApril.Chin@Sun.COM np->nvalue.cp = stkfreeze(stkp,1); 4324887Schin /* now setup .sh.level variable */ 4338462SApril.Chin@Sun.COM shp->st.lineno = error_info.line; 4348462SApril.Chin@Sun.COM level = shp->fn_depth+shp->dot_depth; 4358462SApril.Chin@Sun.COM if(!SH_LEVELNOD->nvfun || !SH_LEVELNOD->nvfun->disc || nv_isattr(SH_LEVELNOD,NV_INT16|NV_NOFREE)!=(NV_INT16|NV_NOFREE)) 4368462SApril.Chin@Sun.COM init_level(level); 4378462SApril.Chin@Sun.COM else 4388462SApril.Chin@Sun.COM nv_putval(SH_LEVELNOD,(char*)&level,NV_INT16); 4398462SApril.Chin@Sun.COM savst = shp->st; 4408462SApril.Chin@Sun.COM shp->st.trap[SH_DEBUGTRAP] = 0; 4414887Schin n = sh_trap(trap,0); 4424887Schin np->nvalue.cp = 0; 4438462SApril.Chin@Sun.COM shp->indebug = 0; 4448462SApril.Chin@Sun.COM if(shp->st.cmdname) 4458462SApril.Chin@Sun.COM error_info.id = shp->st.cmdname; 4468462SApril.Chin@Sun.COM nv_putval(SH_PATHNAMENOD,shp->st.filename,NV_NOFREE); 4478462SApril.Chin@Sun.COM nv_putval(SH_FUNNAMENOD,shp->st.funname,NV_NOFREE); 4488462SApril.Chin@Sun.COM shp->st = savst; 4498462SApril.Chin@Sun.COM if(sav != stkptr(stkp,0)) 4508462SApril.Chin@Sun.COM stkset(stkp,sav,0); 4514887Schin else 4528462SApril.Chin@Sun.COM stkseek(stkp,offset); 4534887Schin return(n); 4544887Schin } 4554887Schin 4564887Schin /* 4574887Schin * Given stream <iop> compile and execute 4584887Schin */ 4594887Schin int sh_eval(register Sfio_t *iop, int mode) 4604887Schin { 4614887Schin register Shnode_t *t; 4624887Schin Shell_t *shp = sh_getinterp(); 4634887Schin struct slnod *saveslp = shp->st.staklist; 4644887Schin int jmpval; 4654887Schin struct checkpt *pp = (struct checkpt*)shp->jmplist; 4664887Schin struct checkpt buff; 4674887Schin static Sfio_t *io_save; 4688462SApril.Chin@Sun.COM volatile int traceon=0, lineno=0; 4694887Schin io_save = iop; /* preserve correct value across longjmp */ 4708462SApril.Chin@Sun.COM #define SH_TOPFUN 0x8000 /* this is a temporary tksh hack */ 4718462SApril.Chin@Sun.COM if (mode & SH_TOPFUN) 4728462SApril.Chin@Sun.COM { 4738462SApril.Chin@Sun.COM mode ^= SH_TOPFUN; 4748462SApril.Chin@Sun.COM shp->fn_reset = 1; 4758462SApril.Chin@Sun.COM } 4764887Schin sh_pushcontext(&buff,SH_JMPEVAL); 4774887Schin buff.olist = pp->olist; 4784887Schin jmpval = sigsetjmp(buff.buff,0); 4794887Schin if(jmpval==0) 4804887Schin { 4818462SApril.Chin@Sun.COM if(mode&SH_READEVAL) 4828462SApril.Chin@Sun.COM { 4838462SApril.Chin@Sun.COM lineno = shp->inlineno; 4848462SApril.Chin@Sun.COM if(traceon=sh_isoption(SH_XTRACE)) 4858462SApril.Chin@Sun.COM sh_offoption(SH_XTRACE); 4868462SApril.Chin@Sun.COM } 4878462SApril.Chin@Sun.COM t = (Shnode_t*)sh_parse(shp,iop,(mode&SH_READEVAL)?0:SH_NL); 4888462SApril.Chin@Sun.COM if(mode&SH_READEVAL) 4898462SApril.Chin@Sun.COM mode &= SH_READEVAL; 4908462SApril.Chin@Sun.COM else 4918462SApril.Chin@Sun.COM sfclose(iop); 4924887Schin io_save = 0; 4934887Schin if(!sh_isoption(SH_VERBOSE)) 4944887Schin sh_offstate(SH_VERBOSE); 4954887Schin if(mode && shp->hist_ptr) 4964887Schin { 4974887Schin hist_flush(shp->hist_ptr); 4984887Schin mode = sh_state(SH_INTERACTIVE); 4994887Schin } 5004887Schin sh_exec(t,sh_isstate(SH_ERREXIT)|mode); 5014887Schin } 5024887Schin sh_popcontext(&buff); 5038462SApril.Chin@Sun.COM if(traceon) 5048462SApril.Chin@Sun.COM sh_onoption(SH_XTRACE); 5058462SApril.Chin@Sun.COM if(lineno) 5068462SApril.Chin@Sun.COM shp->inlineno = lineno; 5074887Schin if(io_save) 5084887Schin sfclose(io_save); 5098462SApril.Chin@Sun.COM sh_freeup(shp); 5104887Schin shp->st.staklist = saveslp; 5118462SApril.Chin@Sun.COM shp->fn_reset = 0; 5124887Schin if(jmpval>SH_JMPEVAL) 5134887Schin siglongjmp(*shp->jmplist,jmpval); 5148462SApril.Chin@Sun.COM return(shp->exitval); 5154887Schin } 5164887Schin 5174887Schin #if SHOPT_FASTPIPE 5188462SApril.Chin@Sun.COM static int pipe_exec(Shell_t* shp,int pv[], Shnode_t *t, int errorflg) 5194887Schin { 5204887Schin struct checkpt buff; 5214887Schin register Shnode_t *tchild = t->fork.forktre; 5224887Schin Namval_t *np; 5238462SApril.Chin@Sun.COM int jmpval; 5248462SApril.Chin@Sun.COM volatile Sfio_t *iop; 5258462SApril.Chin@Sun.COM volatile int r; 5264887Schin if((tchild->tre.tretyp&COMMSK)!=TCOM || !(np=(Namval_t*)(tchild->com.comnamp))) 5274887Schin { 5284887Schin sh_pipe(pv); 5294887Schin return(sh_exec(t,errorflg)); 5304887Schin } 5318462SApril.Chin@Sun.COM pv[0] = shp->lim.open_max; 5328462SApril.Chin@Sun.COM shp->fdstatus[pv[0]] = IOREAD|IODUP|IOSEEK; 5338462SApril.Chin@Sun.COM pv[1] = shp->lim.open_max+1; 5348462SApril.Chin@Sun.COM shp->fdstatus[pv[1]] = IOWRITE|IOSEEK; 5354887Schin iop = sftmp(IOBSIZE+1); 5368462SApril.Chin@Sun.COM shp->sftable[shp->lim.open_max+1] = iop; 5374887Schin sh_pushcontext(&buff,SH_JMPIO); 5384887Schin if(t->tre.tretyp&FPIN) 5398462SApril.Chin@Sun.COM sh_iosave(shp,0,shp->topfd,(char*)0); 5408462SApril.Chin@Sun.COM sh_iosave(shp,1,shp->topfd,(char*)0); 5414887Schin jmpval = sigsetjmp(buff.buff,0); 5424887Schin if(jmpval==0) 5434887Schin { 5444887Schin if(t->tre.tretyp&FPIN) 5458462SApril.Chin@Sun.COM sh_iorenumber(shp,shp->inpipe[0],0); 5468462SApril.Chin@Sun.COM sh_iorenumber(shp,shp->lim.open_max+1,1); 5474887Schin r = sh_exec(tchild,errorflg); 5484887Schin if(sffileno(sfstdout)>=0) 5494887Schin pv[0] = sfsetfd(sfstdout,10); 5504887Schin iop = sfswap(sfstdout,0); 5514887Schin } 5524887Schin sh_popcontext(&buff); 5538462SApril.Chin@Sun.COM shp->sftable[pv[0]] = iop; 5548462SApril.Chin@Sun.COM shp->fdstatus[pv[0]] = IOREAD|IODUP|IOSEEK; 5554887Schin sfset(iop,SF_WRITE,0); 5564887Schin sfseek(iop,0L,SEEK_SET); 5578462SApril.Chin@Sun.COM sh_iorestore(shp,buff.topfd,jmpval); 5584887Schin if(jmpval>SH_JMPIO) 5598462SApril.Chin@Sun.COM siglongjmp(*shp->jmplist,jmpval); 5604887Schin return(r); 5614887Schin } 5624887Schin #endif /* SHOPT_FASTPIPE */ 5634887Schin 5644887Schin /* 5654887Schin * returns 1 when option -<c> is specified 5664887Schin */ 5674887Schin static int checkopt(char *argv[], int c) 5684887Schin { 5694887Schin char *cp; 5704887Schin while(cp = *++argv) 5714887Schin { 5724887Schin if(*cp=='+') 5734887Schin continue; 5744887Schin if(*cp!='-' || cp[1]=='-') 5754887Schin break; 5768462SApril.Chin@Sun.COM if(strchr(++cp,c)) 5774887Schin return(1); 5788462SApril.Chin@Sun.COM if(*cp=='h' && cp[1]==0 && *++argv==0) 5798462SApril.Chin@Sun.COM break; 5804887Schin } 5814887Schin return(0); 5824887Schin } 5834887Schin 5844887Schin static void free_list(struct openlist *olist) 5854887Schin { 5864887Schin struct openlist *item,*next; 5874887Schin for(item=olist;item;item=next) 5884887Schin { 5894887Schin next = item->next; 5904887Schin free((void*)item); 5914887Schin } 5924887Schin } 5934887Schin 5948462SApril.Chin@Sun.COM /* 5958462SApril.Chin@Sun.COM * set ${.sh.name} and ${.sh.subscript} 5968462SApril.Chin@Sun.COM * set _ to reference for ${.sh.name}[$.sh.subscript] 5978462SApril.Chin@Sun.COM */ 5988462SApril.Chin@Sun.COM static int set_instance(Namval_t *nq, Namval_t *node, struct Namref *nr) 5998462SApril.Chin@Sun.COM { 6008462SApril.Chin@Sun.COM char *cp = nv_name(nq); 6018462SApril.Chin@Sun.COM Namarr_t *ap; 6028462SApril.Chin@Sun.COM memset(nr,0,sizeof(*nr)); 6038462SApril.Chin@Sun.COM nr->np = nq; 6048462SApril.Chin@Sun.COM nr->root = sh.var_tree; 6058462SApril.Chin@Sun.COM nr->table = sh.last_table; 6068462SApril.Chin@Sun.COM if(sh.var_tree!=sh.var_base && !nv_open(cp,nr->root,NV_VARNAME|NV_NOREF|NV_NOSCOPE|NV_NOADD|NV_NOFAIL)) 6078462SApril.Chin@Sun.COM nr->root = sh.var_base; 6088462SApril.Chin@Sun.COM nv_putval(SH_NAMENOD, cp, NV_NOFREE); 6098462SApril.Chin@Sun.COM memcpy(node,L_ARGNOD,sizeof(*node)); 6108462SApril.Chin@Sun.COM L_ARGNOD->nvalue.nrp = nr; 6118462SApril.Chin@Sun.COM L_ARGNOD->nvflag = NV_REF|NV_NOFREE; 6128462SApril.Chin@Sun.COM L_ARGNOD->nvfun = 0; 6138462SApril.Chin@Sun.COM L_ARGNOD->nvenv = 0; 6148462SApril.Chin@Sun.COM if((ap=nv_arrayptr(nq)) && (cp = nv_getsub(nq)) && (cp = strdup(cp))) 6158462SApril.Chin@Sun.COM { 6168462SApril.Chin@Sun.COM nv_putval(SH_SUBSCRNOD,nr->sub=cp,NV_NOFREE); 6178462SApril.Chin@Sun.COM return(ap->nelem&ARRAY_SCAN); 6188462SApril.Chin@Sun.COM } 6198462SApril.Chin@Sun.COM return(0); 6208462SApril.Chin@Sun.COM } 6218462SApril.Chin@Sun.COM 6228462SApril.Chin@Sun.COM static void unset_instance(Namval_t *nq, Namval_t *node, struct Namref *nr,long mode) 6238462SApril.Chin@Sun.COM { 6248462SApril.Chin@Sun.COM L_ARGNOD->nvalue.nrp = node->nvalue.nrp; 6258462SApril.Chin@Sun.COM L_ARGNOD->nvflag = node->nvflag; 6268462SApril.Chin@Sun.COM L_ARGNOD->nvfun = node->nvfun; 6278462SApril.Chin@Sun.COM if(nr->sub) 6288462SApril.Chin@Sun.COM { 6298462SApril.Chin@Sun.COM nv_putsub(nq, nr->sub, mode); 6308462SApril.Chin@Sun.COM free((void*)nr->sub); 6318462SApril.Chin@Sun.COM } 6328462SApril.Chin@Sun.COM nv_unset(SH_NAMENOD); 6338462SApril.Chin@Sun.COM nv_unset(SH_SUBSCRNOD); 6348462SApril.Chin@Sun.COM } 6354887Schin 6364887Schin int sh_exec(register const Shnode_t *t, int flags) 6374887Schin { 6388462SApril.Chin@Sun.COM register Shell_t *shp = &sh; 6398462SApril.Chin@Sun.COM Stk_t *stkp = shp->stk; 6404887Schin sh_sigcheck(); 6418462SApril.Chin@Sun.COM if(t && !shp->st.execbrk && !sh_isoption(SH_NOEXEC)) 6424887Schin { 6434887Schin register int type = flags; 6444887Schin register char *com0 = 0; 6454887Schin int errorflg = (type&sh_state(SH_ERREXIT))|OPTIMIZE; 6464887Schin int execflg = (type&sh_state(SH_NOFORK)); 6474887Schin int mainloop = (type&sh_state(SH_INTERACTIVE)); 6488462SApril.Chin@Sun.COM #if SHOPT_AMP || SHOPT_SPAWN 6494887Schin int ntflag = (type&sh_state(SH_NTFORK)); 6504887Schin #endif 6518462SApril.Chin@Sun.COM int topfd = shp->topfd; 6528462SApril.Chin@Sun.COM char *sav=stkptr(stkp,0); 6538462SApril.Chin@Sun.COM char *cp=0, **com=0, *comn; 6544887Schin int argn; 6554887Schin int skipexitset = 0; 6564887Schin int was_interactive = 0; 6574887Schin int was_errexit = sh_isstate(SH_ERREXIT); 6584887Schin int was_monitor = sh_isstate(SH_MONITOR); 6594887Schin int echeck = 0; 6604887Schin if(flags&sh_state(SH_INTERACTIVE)) 6614887Schin { 6624887Schin pipejob = 0; 6634887Schin job.curpgid = 0; 6644887Schin flags &= ~sh_state(SH_INTERACTIVE); 6654887Schin } 6664887Schin sh_offstate(SH_ERREXIT); 6674887Schin sh_offstate(SH_DEFPATH); 6684887Schin if(was_errexit&flags) 6694887Schin sh_onstate(SH_ERREXIT); 6704887Schin if(was_monitor&flags) 6714887Schin sh_onstate(SH_MONITOR); 6724887Schin type = t->tre.tretyp; 6738462SApril.Chin@Sun.COM if(!shp->intrap) 6748462SApril.Chin@Sun.COM shp->oldexit=shp->exitval; 6758462SApril.Chin@Sun.COM shp->exitval=0; 6768462SApril.Chin@Sun.COM shp->lastsig = 0; 6778462SApril.Chin@Sun.COM shp->lastpath = 0; 6784887Schin switch(type&COMMSK) 6794887Schin { 6804887Schin case TCOM: 6814887Schin { 6824887Schin register struct argnod *argp; 6834887Schin char *trap; 6844887Schin Namval_t *np, *nq, *last_table; 6854887Schin struct ionod *io; 6868462SApril.Chin@Sun.COM int command=0, flgs=NV_ASSIGN; 6878462SApril.Chin@Sun.COM shp->bltindata.invariant = type>>(COMBITS+2); 6888462SApril.Chin@Sun.COM type &= (COMMSK|COMSCAN); 6898462SApril.Chin@Sun.COM sh_stats(STAT_SCMDS); 6908462SApril.Chin@Sun.COM error_info.line = t->com.comline-shp->st.firstline; 6918462SApril.Chin@Sun.COM com = sh_argbuild(shp,&argn,&(t->com),OPTIMIZE); 6924887Schin echeck = 1; 6934887Schin if(t->tre.tretyp&COMSCAN) 6944887Schin { 6954887Schin argp = t->com.comarg; 6964887Schin if(argp && *com && !(argp->argflag&ARG_RAW)) 6974887Schin sh_sigcheck(); 6984887Schin } 6994887Schin np = (Namval_t*)(t->com.comnamp); 7004887Schin nq = (Namval_t*)(t->com.comnamq); 7014887Schin com0 = com[0]; 7028462SApril.Chin@Sun.COM shp->xargexit = 0; 7034887Schin while(np==SYSCOMMAND) 7044887Schin { 7058462SApril.Chin@Sun.COM register int n = b_command(0,com,&shp->bltindata); 7064887Schin if(n==0) 7074887Schin break; 7084887Schin command += n; 7094887Schin np = 0; 7104887Schin if(!(com0= *(com+=n))) 7114887Schin break; 7128462SApril.Chin@Sun.COM np = nv_bfsearch(com0, shp->bltin_tree, &nq, &cp); 7134887Schin } 7148462SApril.Chin@Sun.COM if(shp->xargexit) 7154887Schin { 7168462SApril.Chin@Sun.COM shp->xargmin -= command; 7178462SApril.Chin@Sun.COM shp->xargmax -= command; 7184887Schin } 7194887Schin else 7208462SApril.Chin@Sun.COM shp->xargmin = 0; 7214887Schin argn -= command; 7224887Schin if(!command && np && is_abuiltin(np)) 7238462SApril.Chin@Sun.COM np = dtsearch(shp->fun_tree,np); 7248462SApril.Chin@Sun.COM if(com0) 7254887Schin { 7268462SApril.Chin@Sun.COM if(!np && !strchr(com0,'/')) 7274887Schin { 7288462SApril.Chin@Sun.COM Dt_t *root = command?shp->bltin_tree:shp->fun_tree; 7298462SApril.Chin@Sun.COM np = nv_bfsearch(com0, root, &nq, &cp); 7308462SApril.Chin@Sun.COM #if SHOPT_NAMESPACE 7318462SApril.Chin@Sun.COM if(shp->namespace && !nq && !cp) 7328462SApril.Chin@Sun.COM { 7338462SApril.Chin@Sun.COM int offset = stktell(stkp); 7348462SApril.Chin@Sun.COM sfputr(stkp,nv_name(shp->namespace),-1); 7358462SApril.Chin@Sun.COM sfputc(stkp,'.'); 7368462SApril.Chin@Sun.COM sfputr(stkp,com0,0); 7378462SApril.Chin@Sun.COM stkseek(stkp,offset); 7388462SApril.Chin@Sun.COM np = nv_bfsearch(stkptr(stkp,offset), root, &nq, &cp); 7398462SApril.Chin@Sun.COM } 7408462SApril.Chin@Sun.COM #endif /* SHOPT_NAMESPACE */ 7414887Schin } 7428462SApril.Chin@Sun.COM comn = com[argn-1]; 7434887Schin } 7444887Schin io = t->tre.treio; 7458462SApril.Chin@Sun.COM if(shp->envlist = argp = t->com.comset) 7464887Schin { 7478462SApril.Chin@Sun.COM if(argn==0 || (np && nv_isattr(np,BLT_SPC))) 7484887Schin { 7498462SApril.Chin@Sun.COM if(argn) 7508462SApril.Chin@Sun.COM { 7518462SApril.Chin@Sun.COM if(checkopt(com,'A')) 7528462SApril.Chin@Sun.COM flgs |= NV_ARRAY; 7538462SApril.Chin@Sun.COM else if(checkopt(com,'a')) 7548462SApril.Chin@Sun.COM flgs |= NV_IARRAY; 7558462SApril.Chin@Sun.COM } 7564887Schin #if SHOPT_BASH 7574887Schin if(np==SYSLOCAL) 7584887Schin { 7594887Schin if(!nv_getval(SH_FUNNAMENOD)) 7604887Schin errormsg(SH_DICT,ERROR_exit(1),"%s: can only be used in a function",com0); 7618462SApril.Chin@Sun.COM if(!shp->st.var_local) 7624887Schin { 7638462SApril.Chin@Sun.COM sh_scope(shp,(struct argnod*)0,0); 7648462SApril.Chin@Sun.COM shp->st.var_local = shp->var_tree; 7654887Schin } 7664887Schin 7674887Schin } 7684887Schin if(np==SYSTYPESET || np==SYSLOCAL) 7694887Schin #else 7708462SApril.Chin@Sun.COM if(np==SYSTYPESET || (np && np->nvalue.bfp==SYSTYPESET->nvalue.bfp)) 7714887Schin #endif 7724887Schin { 7738462SApril.Chin@Sun.COM if(np!=SYSTYPESET) 7748462SApril.Chin@Sun.COM shp->typeinit = np; 7758462SApril.Chin@Sun.COM if(checkopt(com,'C')) 7768462SApril.Chin@Sun.COM flgs |= NV_COMVAR; 7778462SApril.Chin@Sun.COM if(checkopt(com,'S')) 7788462SApril.Chin@Sun.COM flgs |= NV_STATIC; 7794887Schin if(checkopt(com,'n')) 7804887Schin flgs |= NV_NOREF; 7814887Schin #if SHOPT_TYPEDEF 7828462SApril.Chin@Sun.COM else if(argn>=3 && checkopt(com,'T')) 7834887Schin { 7848462SApril.Chin@Sun.COM shp->prefix = NV_CLASS; 7854887Schin flgs |= NV_TYPE; 7864887Schin 7874887Schin } 7884887Schin #endif /* SHOPT_TYPEDEF */ 7898462SApril.Chin@Sun.COM if((shp->fn_depth && !shp->prefix) || np==SYSLOCAL) 7904887Schin flgs |= NV_NOSCOPE; 7914887Schin } 7924887Schin else if(np==SYSEXPORT) 7934887Schin flgs |= NV_EXPORT; 7948462SApril.Chin@Sun.COM if(flgs&(NV_EXPORT|NV_NOREF)) 7958462SApril.Chin@Sun.COM flgs |= NV_IDENT; 7968462SApril.Chin@Sun.COM else 7978462SApril.Chin@Sun.COM flgs |= NV_VARNAME; 7984887Schin #if 0 7994887Schin if(OPTIMIZE) 8004887Schin flgs |= NV_TAGGED; 8014887Schin #endif 8024887Schin nv_setlist(argp,flgs); 8038462SApril.Chin@Sun.COM if(np==shp->typeinit) 8048462SApril.Chin@Sun.COM shp->typeinit = 0; 8058462SApril.Chin@Sun.COM shp->envlist = argp; 8064887Schin argp = NULL; 8074887Schin } 8084887Schin } 8098462SApril.Chin@Sun.COM last_table = shp->last_table; 8108462SApril.Chin@Sun.COM shp->last_table = 0; 8114887Schin if((io||argn)) 8124887Schin { 8138462SApril.Chin@Sun.COM Shbltin_t *bp=0; 8144887Schin static char *argv[1]; 8158462SApril.Chin@Sun.COM int tflags = 1; 8168462SApril.Chin@Sun.COM if(np && nv_isattr(np,BLT_DCL)) 8178462SApril.Chin@Sun.COM tflags |= 2; 8184887Schin if(argn==0) 8194887Schin { 8204887Schin /* fake 'true' built-in */ 8214887Schin np = SYSTRUE; 8224887Schin *argv = nv_name(np); 8234887Schin com = argv; 8244887Schin } 8254887Schin /* set +x doesn't echo */ 8264887Schin else if((np!=SYSSET) && sh_isoption(SH_XTRACE)) 8278462SApril.Chin@Sun.COM sh_trace(com-command,tflags); 8284887Schin else if((t->tre.tretyp&FSHOWME) && sh_isoption(SH_SHOWME)) 8294887Schin { 8304887Schin int ison = sh_isoption(SH_XTRACE); 8314887Schin if(!ison) 8324887Schin sh_onoption(SH_XTRACE); 8338462SApril.Chin@Sun.COM sh_trace(com-command,tflags); 8344887Schin if(io) 8358462SApril.Chin@Sun.COM sh_redirect(shp,io,SH_SHOWME); 8364887Schin if(!ison) 8374887Schin sh_offoption(SH_XTRACE); 8384887Schin break; 8394887Schin } 8408462SApril.Chin@Sun.COM if(trap=shp->st.trap[SH_DEBUGTRAP]) 8418462SApril.Chin@Sun.COM { 8428462SApril.Chin@Sun.COM int n = sh_debug(shp,trap,(char*)0,(char*)0, com, ARG_RAW); 8438462SApril.Chin@Sun.COM if(n==255 && shp->fn_depth+shp->dot_depth) 8448462SApril.Chin@Sun.COM { 8458462SApril.Chin@Sun.COM np = SYSRETURN; 8468462SApril.Chin@Sun.COM argn = 1; 8478462SApril.Chin@Sun.COM com[0] = np->nvname; 8488462SApril.Chin@Sun.COM com[1] = 0; 8498462SApril.Chin@Sun.COM io = 0; 8508462SApril.Chin@Sun.COM argp = 0; 8518462SApril.Chin@Sun.COM } 8528462SApril.Chin@Sun.COM else if(n==2) 8538462SApril.Chin@Sun.COM break; 8548462SApril.Chin@Sun.COM } 8554887Schin if(io) 8568462SApril.Chin@Sun.COM sfsync(shp->outpool); 8578462SApril.Chin@Sun.COM shp->lastpath = 0; 8584887Schin if(!np && !strchr(com0,'/')) 8594887Schin { 8608462SApril.Chin@Sun.COM if(path_search(com0,NIL(Pathcomp_t**),1)) 8618462SApril.Chin@Sun.COM { 8628462SApril.Chin@Sun.COM error_info.line = t->com.comline-shp->st.firstline; 8638462SApril.Chin@Sun.COM if((np=nv_search(com0,shp->fun_tree,0)) && !np->nvalue.ip) 8648462SApril.Chin@Sun.COM { 8658462SApril.Chin@Sun.COM Namval_t *mp=nv_search(com0,shp->bltin_tree,0); 8668462SApril.Chin@Sun.COM if(mp) 8678462SApril.Chin@Sun.COM np = mp; 8688462SApril.Chin@Sun.COM } 8698462SApril.Chin@Sun.COM } 8704887Schin else 8714887Schin { 8728462SApril.Chin@Sun.COM if((np=nv_search(com0,shp->track_tree,0)) && !nv_isattr(np,NV_NOALIAS) && np->nvalue.cp) 8738462SApril.Chin@Sun.COM np=nv_search(nv_getval(np),shp->bltin_tree,0); 8744887Schin else 8754887Schin np = 0; 8764887Schin } 8774887Schin } 8784887Schin /* check for builtins */ 8794887Schin if(np && is_abuiltin(np)) 8804887Schin { 8818462SApril.Chin@Sun.COM volatile int scope=0, share=0; 8828462SApril.Chin@Sun.COM volatile void *save_ptr; 8838462SApril.Chin@Sun.COM volatile void *save_data; 8848462SApril.Chin@Sun.COM int jmpval, save_prompt; 8854887Schin struct checkpt buff; 8864887Schin unsigned long was_vi=0, was_emacs=0, was_gmacs=0; 8874887Schin struct stat statb; 8888462SApril.Chin@Sun.COM bp = &shp->bltindata; 8898462SApril.Chin@Sun.COM save_ptr = bp->ptr; 8908462SApril.Chin@Sun.COM save_data = bp->data; 8918462SApril.Chin@Sun.COM memset(&statb, 0, sizeof(struct stat)); 8924887Schin if(strchr(nv_name(np),'/')) 8934887Schin { 8944887Schin /* 8954887Schin * disable editors for built-in 8964887Schin * versions of commands on PATH 8974887Schin */ 8984887Schin was_vi = sh_isoption(SH_VI); 8994887Schin was_emacs = sh_isoption(SH_EMACS); 9004887Schin was_gmacs = sh_isoption(SH_GMACS); 9014887Schin sh_offoption(SH_VI); 9024887Schin sh_offoption(SH_EMACS); 9034887Schin sh_offoption(SH_GMACS); 9044887Schin } 9054887Schin sh_pushcontext(&buff,SH_JMPCMD); 9064887Schin jmpval = sigsetjmp(buff.buff,1); 9074887Schin if(jmpval == 0) 9084887Schin { 9094887Schin if(!(nv_isattr(np,BLT_ENV))) 9104887Schin error_info.flags |= ERROR_SILENT; 9114887Schin errorpush(&buff.err,0); 9124887Schin if(io) 9134887Schin { 9144887Schin struct openlist *item; 9154887Schin if(np==SYSLOGIN) 9164887Schin type=1; 9174887Schin else if(np==SYSEXEC) 9184887Schin type=1+!com[1]; 9194887Schin else 9208462SApril.Chin@Sun.COM type = (execflg && !shp->subshell && !shp->st.trapcom[0]); 9218462SApril.Chin@Sun.COM sh_redirect(shp,io,type); 9224887Schin for(item=buff.olist;item;item=item->next) 9234887Schin item->strm=0; 9244887Schin } 9254887Schin if(!(nv_isattr(np,BLT_ENV))) 9264887Schin { 9278462SApril.Chin@Sun.COM if(bp->nosfio) 9288462SApril.Chin@Sun.COM { 9298462SApril.Chin@Sun.COM if(!shp->pwd) 9308462SApril.Chin@Sun.COM path_pwd(0); 9318462SApril.Chin@Sun.COM if(shp->pwd) 9328462SApril.Chin@Sun.COM stat(".",&statb); 9338462SApril.Chin@Sun.COM } 9348462SApril.Chin@Sun.COM sfsync(NULL); 9354887Schin share = sfset(sfstdin,SF_SHARE,0); 9364887Schin sh_onstate(SH_STOPOK); 9374887Schin sfpool(sfstderr,NIL(Sfio_t*),SF_WRITE); 9384887Schin sfset(sfstderr,SF_LINE,1); 9398462SApril.Chin@Sun.COM save_prompt = shp->nextprompt; 9408462SApril.Chin@Sun.COM shp->nextprompt = 0; 9414887Schin } 9424887Schin if(argp) 9434887Schin { 9444887Schin scope++; 9458462SApril.Chin@Sun.COM sh_scope(shp,argp,0); 9464887Schin } 9474887Schin opt_info.index = opt_info.offset = 0; 9484887Schin opt_info.disc = 0; 9494887Schin error_info.id = *com; 9508462SApril.Chin@Sun.COM if(argn) 9518462SApril.Chin@Sun.COM shp->exitval = 0; 9528462SApril.Chin@Sun.COM shp->bltinfun = funptr(np); 9538462SApril.Chin@Sun.COM bp->bnode = np; 9548462SApril.Chin@Sun.COM bp->vnode = nq; 9558462SApril.Chin@Sun.COM bp->ptr = nv_context(np); 9568462SApril.Chin@Sun.COM bp->data = t->com.comstate; 9578462SApril.Chin@Sun.COM bp->sigset = 0; 9588462SApril.Chin@Sun.COM bp->notify = 0; 9598462SApril.Chin@Sun.COM bp->flags = (OPTIMIZE!=0); 9608462SApril.Chin@Sun.COM if(shp->subshell && nv_isattr(np,BLT_NOSFIO)) 9618462SApril.Chin@Sun.COM sh_subtmpfile(0); 9628462SApril.Chin@Sun.COM if(execflg && !shp->subshell && 9638462SApril.Chin@Sun.COM !shp->st.trapcom[0] && !shp->st.trap[SH_ERRTRAP] && shp->fn_depth==0 && !nv_isattr(np,BLT_ENV)) 9644887Schin { 9654887Schin /* do close-on-exec */ 9664887Schin int fd; 9678462SApril.Chin@Sun.COM for(fd=0; fd < shp->lim.open_max; fd++) 9688462SApril.Chin@Sun.COM if((shp->fdstatus[fd]&IOCLEX)&&fd!=shp->infd) 9694887Schin sh_close(fd); 9704887Schin } 9718462SApril.Chin@Sun.COM if(argn) 9728462SApril.Chin@Sun.COM shp->exitval = (*shp->bltinfun)(argn,com,(void*)bp); 9734887Schin if(error_info.flags&ERROR_INTERACTIVE) 9744887Schin tty_check(ERRIO); 9758462SApril.Chin@Sun.COM ((Shnode_t*)t)->com.comstate = shp->bltindata.data; 9768462SApril.Chin@Sun.COM bp->data = (void*)save_data; 9778462SApril.Chin@Sun.COM if(!nv_isattr(np,BLT_EXIT) && shp->exitval!=SH_RUNPROG) 9788462SApril.Chin@Sun.COM shp->exitval &= SH_EXITMASK; 9794887Schin } 9804887Schin else 9814887Schin { 9824887Schin struct openlist *item; 9834887Schin for(item=buff.olist;item;item=item->next) 9844887Schin { 9854887Schin if(item->strm) 9864887Schin { 9874887Schin sfclrlock(item->strm); 9888462SApril.Chin@Sun.COM if(shp->hist_ptr && item->strm == shp->hist_ptr->histfp) 9898462SApril.Chin@Sun.COM hist_close(shp->hist_ptr); 9904887Schin else 9914887Schin sfclose(item->strm); 9924887Schin } 9934887Schin } 9948462SApril.Chin@Sun.COM if(shp->bltinfun && (error_info.flags&ERROR_NOTIFY)) 9958462SApril.Chin@Sun.COM (*shp->bltinfun)(-2,com,(void*)bp); 9964887Schin /* failure on special built-ins fatal */ 9974887Schin if(jmpval<=SH_JMPCMD && (!nv_isattr(np,BLT_SPC) || command)) 9984887Schin jmpval=0; 9994887Schin } 10008462SApril.Chin@Sun.COM if(bp && bp->ptr!= nv_context(np)) 10018462SApril.Chin@Sun.COM np->nvfun = (Namfun_t*)bp->ptr; 10024887Schin if(!(nv_isattr(np,BLT_ENV))) 10034887Schin { 10048462SApril.Chin@Sun.COM if(bp->nosfio && shp->pwd) 10054887Schin { 10064887Schin struct stat stata; 10074887Schin stat(".",&stata); 10084887Schin /* restore directory changed */ 10094887Schin if(statb.st_ino!=stata.st_ino || statb.st_dev!=stata.st_dev) 10108462SApril.Chin@Sun.COM chdir(shp->pwd); 10114887Schin } 10124887Schin sh_offstate(SH_STOPOK); 10134887Schin if(share&SF_SHARE) 10144887Schin sfset(sfstdin,SF_PUBLIC|SF_SHARE,1); 10154887Schin sfset(sfstderr,SF_LINE,0); 10168462SApril.Chin@Sun.COM sfpool(sfstderr,shp->outpool,SF_WRITE); 10174887Schin sfpool(sfstdin,NIL(Sfio_t*),SF_WRITE); 10188462SApril.Chin@Sun.COM shp->nextprompt = save_prompt; 10194887Schin } 10204887Schin sh_popcontext(&buff); 10214887Schin errorpop(&buff.err); 10224887Schin error_info.flags &= ~ERROR_SILENT; 10238462SApril.Chin@Sun.COM shp->bltinfun = 0; 10244887Schin if(buff.olist) 10254887Schin free_list(buff.olist); 10264887Schin if(was_vi) 10274887Schin sh_onoption(SH_VI); 10284887Schin else if(was_emacs) 10294887Schin sh_onoption(SH_EMACS); 10304887Schin else if(was_gmacs) 10314887Schin sh_onoption(SH_GMACS); 10324887Schin if(scope) 10338462SApril.Chin@Sun.COM sh_unscope(shp); 10348462SApril.Chin@Sun.COM bp->ptr = (void*)save_ptr; 10358462SApril.Chin@Sun.COM bp->data = (void*)save_data; 10364887Schin /* don't restore for subshell exec */ 10378462SApril.Chin@Sun.COM if((shp->topfd>topfd) && !(shp->subshell && np==SYSEXEC)) 10388462SApril.Chin@Sun.COM sh_iorestore(shp,topfd,jmpval); 10394887Schin if(jmpval) 10408462SApril.Chin@Sun.COM siglongjmp(*shp->jmplist,jmpval); 10418462SApril.Chin@Sun.COM #if 0 10428462SApril.Chin@Sun.COM if(flgs&NV_STATIC) 10438462SApril.Chin@Sun.COM ((Shnode_t*)t)->com.comset = 0; 10448462SApril.Chin@Sun.COM #endif 10458462SApril.Chin@Sun.COM if(shp->exitval >=0) 10464887Schin goto setexit; 10474887Schin np = 0; 10484887Schin type=0; 10494887Schin } 10504887Schin /* check for functions */ 10514887Schin if(!command && np && nv_isattr(np,NV_FUNCTION)) 10524887Schin { 10538462SApril.Chin@Sun.COM volatile int indx; 10548462SApril.Chin@Sun.COM int jmpval=0; 10554887Schin struct checkpt buff; 10564887Schin Namval_t node; 10578462SApril.Chin@Sun.COM struct Namref nr; 10588462SApril.Chin@Sun.COM long mode; 10594887Schin register struct slnod *slp; 10604887Schin if(!np->nvalue.ip) 10614887Schin { 10628462SApril.Chin@Sun.COM indx = path_search(com0,NIL(Pathcomp_t**),0); 10634887Schin if(indx==1) 10648462SApril.Chin@Sun.COM np = nv_search(com0,shp->fun_tree,HASH_NOSCOPE); 10658462SApril.Chin@Sun.COM 10664887Schin if(!np->nvalue.ip) 10674887Schin { 10684887Schin if(indx==1) 10694887Schin { 10704887Schin errormsg(SH_DICT,ERROR_exit(0),e_defined,com0); 10718462SApril.Chin@Sun.COM shp->exitval = ERROR_NOEXEC; 10724887Schin } 10734887Schin else 10744887Schin { 10754887Schin errormsg(SH_DICT,ERROR_exit(0),e_found,"function"); 10768462SApril.Chin@Sun.COM shp->exitval = ERROR_NOENT; 10774887Schin } 10784887Schin goto setexit; 10794887Schin } 10804887Schin } 10814887Schin /* increase refcnt for unset */ 10824887Schin slp = (struct slnod*)np->nvenv; 10834887Schin sh_funstaks(slp->slchild,1); 10844887Schin staklink(slp->slptr); 10854887Schin if(nq) 10864887Schin { 10878462SApril.Chin@Sun.COM shp->last_table = last_table; 10888462SApril.Chin@Sun.COM mode = set_instance(nq,&node,&nr); 10894887Schin } 10904887Schin if(io) 10914887Schin { 10928462SApril.Chin@Sun.COM indx = shp->topfd; 10934887Schin sh_pushcontext(&buff,SH_JMPCMD); 10944887Schin jmpval = sigsetjmp(buff.buff,0); 10954887Schin } 10964887Schin if(jmpval == 0) 10974887Schin { 10984887Schin if(io) 10998462SApril.Chin@Sun.COM indx = sh_redirect(shp,io,execflg); 11008462SApril.Chin@Sun.COM sh_funct(shp,np,argn,com,t->com.comset,(flags&~OPTIMIZE_FLAG)); 11014887Schin } 11024887Schin if(io) 11034887Schin { 11044887Schin if(buff.olist) 11054887Schin free_list(buff.olist); 11064887Schin sh_popcontext(&buff); 11078462SApril.Chin@Sun.COM sh_iorestore(shp,indx,jmpval); 11084887Schin } 11094887Schin if(nq) 11108462SApril.Chin@Sun.COM unset_instance(nq,&node,&nr,mode); 11114887Schin sh_funstaks(slp->slchild,-1); 11124887Schin stakdelete(slp->slptr); 11134887Schin if(jmpval > SH_JMPFUN) 11148462SApril.Chin@Sun.COM siglongjmp(*shp->jmplist,jmpval); 11154887Schin goto setexit; 11164887Schin } 11174887Schin } 11184887Schin else if(!io) 11194887Schin { 11204887Schin setexit: 11214887Schin exitset(); 11224887Schin break; 11234887Schin } 11244887Schin } 11254887Schin case TFORK: 11264887Schin { 11274887Schin register pid_t parent; 11284887Schin int no_fork,jobid; 11294887Schin int pipes[2]; 11304887Schin no_fork = (execflg && !(type&(FAMP|FPOU)) && 11318462SApril.Chin@Sun.COM #if SHOPT_AMP || SHOPT_SPAWN 11328462SApril.Chin@Sun.COM !ntflag && 11338462SApril.Chin@Sun.COM #endif 11348462SApril.Chin@Sun.COM !shp->subshell && !shp->st.trapcom[0] && 11358462SApril.Chin@Sun.COM !shp->st.trap[SH_ERRTRAP] && shp->fn_depth==0 && 11368462SApril.Chin@Sun.COM !(pipejob && sh_isoption(SH_PIPEFAIL))); 11378462SApril.Chin@Sun.COM if(shp->subshell) 11388462SApril.Chin@Sun.COM sh_subtmpfile(1); 11398462SApril.Chin@Sun.COM if(sh_isstate(SH_PROFILE) || shp->dot_depth) 11404887Schin { 11414887Schin /* disable foreground job monitor */ 11424887Schin if(!(type&FAMP)) 11434887Schin sh_offstate(SH_MONITOR); 11444887Schin #if SHOPT_DEVFD 11454887Schin else if(!(type&FINT)) 11464887Schin sh_offstate(SH_MONITOR); 11474887Schin #endif /* SHOPT_DEVFD */ 11484887Schin } 11494887Schin if(no_fork) 11504887Schin job.parent=parent=0; 11514887Schin else 11524887Schin { 11534887Schin if(type&FCOOP) 11548462SApril.Chin@Sun.COM coproc_init(shp,pipes); 11554887Schin nv_getval(RANDNOD); 11564887Schin #if SHOPT_AMP 11574887Schin if((type&(FAMP|FINT)) == (FAMP|FINT)) 11588462SApril.Chin@Sun.COM parent = sh_ntfork(shp,t,com,&jobid,ntflag); 11594887Schin else 11604887Schin parent = sh_fork(type,&jobid); 11614887Schin if(parent<0) 11624887Schin break; 11634887Schin #else 11644887Schin #if SHOPT_SPAWN 11654887Schin # ifdef _lib_fork 11664887Schin if(com) 11678462SApril.Chin@Sun.COM parent = sh_ntfork(shp,t,com,&jobid,ntflag); 11684887Schin else 11694887Schin parent = sh_fork(type,&jobid); 11704887Schin # else 11718462SApril.Chin@Sun.COM if((parent = sh_ntfork(shp,t,com,&jobid,ntflag))<=0) 11724887Schin break; 11734887Schin # endif /* _lib_fork */ 11744887Schin if(parent<0) 11754887Schin break; 11764887Schin #else 11774887Schin parent = sh_fork(type,&jobid); 11784887Schin #endif /* SHOPT_SPAWN */ 11794887Schin #endif 11804887Schin } 11814887Schin if(job.parent=parent) 11824887Schin /* This is the parent branch of fork 11834887Schin * It may or may not wait for the child 11844887Schin */ 11854887Schin { 11864887Schin if(type&FPCL) 11878462SApril.Chin@Sun.COM sh_close(shp->inpipe[0]); 11884887Schin if(type&(FCOOP|FAMP)) 11898462SApril.Chin@Sun.COM shp->bckpid = parent; 11908462SApril.Chin@Sun.COM else if(!(type&(FAMP|FPOU))) 11914887Schin { 11928462SApril.Chin@Sun.COM if(shp->topfd > topfd) 11938462SApril.Chin@Sun.COM sh_iorestore(shp,topfd,0); 11948462SApril.Chin@Sun.COM if(!sh_isoption(SH_MONITOR)) 11958462SApril.Chin@Sun.COM { 11968462SApril.Chin@Sun.COM if(!(shp->sigflag[SIGINT]&(SH_SIGFAULT|SH_SIGOFF))) 11978462SApril.Chin@Sun.COM sh_sigtrap(SIGINT); 11988462SApril.Chin@Sun.COM shp->trapnote |= SH_SIGIGNORE; 11998462SApril.Chin@Sun.COM } 12008462SApril.Chin@Sun.COM if(execflg && shp->subshell) 12018462SApril.Chin@Sun.COM { 12028462SApril.Chin@Sun.COM shp->spid = parent; 12038462SApril.Chin@Sun.COM job.pwlist->p_env--; 12048462SApril.Chin@Sun.COM } 12058462SApril.Chin@Sun.COM else 12068462SApril.Chin@Sun.COM job_wait(parent); 12078462SApril.Chin@Sun.COM if(!sh_isoption(SH_MONITOR)) 12088462SApril.Chin@Sun.COM { 12098462SApril.Chin@Sun.COM shp->trapnote &= ~SH_SIGIGNORE; 12108462SApril.Chin@Sun.COM if(shp->exitval == (SH_EXITSIG|SIGINT)) 12118462SApril.Chin@Sun.COM sh_fault(SIGINT); 12128462SApril.Chin@Sun.COM } 12134887Schin } 12144887Schin if(type&FAMP) 12154887Schin { 12164887Schin if(sh_isstate(SH_PROFILE) || sh_isstate(SH_INTERACTIVE)) 12174887Schin { 12184887Schin /* print job number */ 12194887Schin #ifdef JOBS 12204887Schin sfprintf(sfstderr,"[%d]\t%d\n",jobid,parent); 12214887Schin #else 12224887Schin sfprintf(sfstderr,"%d\n",parent); 12234887Schin #endif /* JOBS */ 12244887Schin } 12254887Schin } 12264887Schin break; 12274887Schin } 12284887Schin else 12294887Schin /* 12304887Schin * this is the FORKED branch (child) of execute 12314887Schin */ 12324887Schin { 12338462SApril.Chin@Sun.COM volatile int jmpval; 12344887Schin struct checkpt buff; 12354887Schin if(no_fork) 12364887Schin sh_sigreset(2); 12374887Schin sh_pushcontext(&buff,SH_JMPEXIT); 12384887Schin jmpval = sigsetjmp(buff.buff,0); 12394887Schin if(jmpval) 12404887Schin goto done; 12414887Schin if((type&FINT) && !sh_isstate(SH_MONITOR)) 12424887Schin { 12434887Schin /* default std input for & */ 12444887Schin signal(SIGINT,SIG_IGN); 12454887Schin signal(SIGQUIT,SIG_IGN); 12468462SApril.Chin@Sun.COM if(!shp->st.ioset) 12474887Schin { 12484887Schin if(sh_close(0)>=0) 12494887Schin sh_chkopen(e_devnull); 12504887Schin } 12514887Schin } 12524887Schin sh_offstate(SH_MONITOR); 12534887Schin /* pipe in or out */ 12544887Schin #ifdef _lib_nice 12554887Schin if((type&FAMP) && sh_isoption(SH_BGNICE)) 12564887Schin nice(4); 12574887Schin #endif /* _lib_nice */ 12584887Schin if(type&FPIN) 12594887Schin { 12608462SApril.Chin@Sun.COM sh_iorenumber(shp,shp->inpipe[0],0); 12614887Schin if(!(type&FPOU) || (type&FCOOP)) 12628462SApril.Chin@Sun.COM sh_close(shp->inpipe[1]); 12634887Schin } 12644887Schin if(type&FPOU) 12654887Schin { 12668462SApril.Chin@Sun.COM sh_iorenumber(shp,shp->outpipe[1],1); 12678462SApril.Chin@Sun.COM sh_pclose(shp->outpipe); 12684887Schin } 12694887Schin if((type&COMMSK)!=TCOM) 12708462SApril.Chin@Sun.COM error_info.line = t->fork.forkline-shp->st.firstline; 12718462SApril.Chin@Sun.COM if(shp->topfd) 12728462SApril.Chin@Sun.COM sh_iounsave(shp); 12738462SApril.Chin@Sun.COM topfd = shp->topfd; 12748462SApril.Chin@Sun.COM sh_redirect(shp,t->tre.treio,1); 12758462SApril.Chin@Sun.COM if(shp->topfd > topfd) 12768462SApril.Chin@Sun.COM { 12778462SApril.Chin@Sun.COM while((parent = vfork()) < 0) 12788462SApril.Chin@Sun.COM _sh_fork(parent, 0, (int*)0); 12798462SApril.Chin@Sun.COM if(parent) 12808462SApril.Chin@Sun.COM { 12818462SApril.Chin@Sun.COM job_clear(); 12828462SApril.Chin@Sun.COM job_post(parent,0); 12838462SApril.Chin@Sun.COM job_wait(parent); 12848462SApril.Chin@Sun.COM sh_iorestore(shp,topfd,SH_JMPCMD); 12858462SApril.Chin@Sun.COM sh_done(shp,(shp->exitval&SH_EXITSIG)?(shp->exitval&SH_EXITMASK):0); 12868462SApril.Chin@Sun.COM 12878462SApril.Chin@Sun.COM } 12888462SApril.Chin@Sun.COM } 12894887Schin if((type&COMMSK)!=TCOM) 12904887Schin { 12914887Schin /* don't clear job table for out 12924887Schin pipes so that jobs comand can 12934887Schin be used in a pipeline 12944887Schin */ 12954887Schin if(!no_fork && !(type&FPOU)) 12964887Schin job_clear(); 12974887Schin sh_exec(t->fork.forktre,flags|sh_state(SH_NOFORK)); 12984887Schin } 12994887Schin else if(com0) 13004887Schin { 13014887Schin sh_offoption(SH_ERREXIT); 13028462SApril.Chin@Sun.COM sh_freeup(shp); 13034887Schin path_exec(com0,com,t->com.comset); 13044887Schin } 13054887Schin done: 13064887Schin sh_popcontext(&buff); 13074887Schin if(jmpval>SH_JMPEXIT) 13088462SApril.Chin@Sun.COM siglongjmp(*shp->jmplist,jmpval); 13098462SApril.Chin@Sun.COM sh_done(shp,0); 13104887Schin } 13114887Schin } 13124887Schin 13134887Schin case TSETIO: 13144887Schin { 13154887Schin /* 13164887Schin * don't create a new process, just 13174887Schin * save and restore io-streams 13184887Schin */ 13194887Schin pid_t pid; 13204887Schin int jmpval, waitall; 13214887Schin struct checkpt buff; 13228462SApril.Chin@Sun.COM if(shp->subshell) 13234887Schin execflg = 0; 13244887Schin sh_pushcontext(&buff,SH_JMPIO); 13254887Schin if(type&FPIN) 13264887Schin { 13274887Schin was_interactive = sh_isstate(SH_INTERACTIVE); 13284887Schin sh_offstate(SH_INTERACTIVE); 13294887Schin if(!execflg) 13308462SApril.Chin@Sun.COM sh_iosave(shp,0,shp->topfd,(char*)0); 13318462SApril.Chin@Sun.COM sh_iorenumber(shp,shp->inpipe[0],0); 13324887Schin /* 13334887Schin * if read end of pipe is a simple command 13344887Schin * treat as non-sharable to improve performance 13354887Schin */ 13364887Schin if((t->fork.forktre->tre.tretyp&COMMSK)==TCOM) 13374887Schin sfset(sfstdin,SF_PUBLIC|SF_SHARE,0); 13384887Schin waitall = job.waitall; 13394887Schin job.waitall = 0; 13404887Schin pid = job.parent; 13414887Schin } 13424887Schin else 13438462SApril.Chin@Sun.COM error_info.line = t->fork.forkline-shp->st.firstline; 13444887Schin jmpval = sigsetjmp(buff.buff,0); 13454887Schin if(jmpval==0) 13464887Schin { 13478462SApril.Chin@Sun.COM sh_redirect(shp,t->fork.forkio,execflg); 13484887Schin (t->fork.forktre)->tre.tretyp |= t->tre.tretyp&FSHOWME; 13494887Schin sh_exec(t->fork.forktre,flags); 13504887Schin } 13518462SApril.Chin@Sun.COM else 13528462SApril.Chin@Sun.COM sfsync(shp->outpool); 13534887Schin sh_popcontext(&buff); 13548462SApril.Chin@Sun.COM sh_iorestore(shp,buff.topfd,jmpval); 13554887Schin if(buff.olist) 13564887Schin free_list(buff.olist); 13574887Schin if(type&FPIN) 13584887Schin { 13594887Schin job.waitall = waitall; 13608462SApril.Chin@Sun.COM type = shp->exitval; 13614887Schin if(!(type&SH_EXITSIG)) 13624887Schin { 13634887Schin /* wait for remainder of pipline */ 13644887Schin job_wait(waitall?pid:0); 13654887Schin if(type || !sh_isoption(SH_PIPEFAIL)) 13668462SApril.Chin@Sun.COM shp->exitval = type; 13674887Schin } 13688462SApril.Chin@Sun.COM shp->st.ioset = 0; 13694887Schin } 13704887Schin if(jmpval>SH_JMPIO) 13718462SApril.Chin@Sun.COM siglongjmp(*shp->jmplist,jmpval); 13724887Schin break; 13734887Schin } 13744887Schin 13754887Schin case TPAR: 13764887Schin echeck = 1; 13774887Schin flags &= ~OPTIMIZE_FLAG; 13788462SApril.Chin@Sun.COM if(!shp->subshell && !shp->st.trapcom[0] && !shp->st.trap[SH_ERRTRAP] && (flags&sh_state(SH_NOFORK))) 13794887Schin { 13804887Schin int jmpval; 13814887Schin struct checkpt buff; 13824887Schin sh_pushcontext(&buff,SH_JMPEXIT); 13834887Schin jmpval = sigsetjmp(buff.buff,0); 13844887Schin if(jmpval==0) 13854887Schin sh_exec(t->par.partre,flags); 13864887Schin sh_popcontext(&buff); 13874887Schin if(jmpval > SH_JMPEXIT) 13888462SApril.Chin@Sun.COM siglongjmp(*shp->jmplist,jmpval); 13898462SApril.Chin@Sun.COM sh_done(shp,0); 13904887Schin } 13914887Schin else 13924887Schin sh_subshell(t->par.partre,flags,0); 13934887Schin break; 13944887Schin 13954887Schin case TFIL: 13964887Schin { 13974887Schin /* 13984887Schin * This code sets up a pipe. 13994887Schin * All elements of the pipe are started by the parent. 14004887Schin * The last element executes in current environment 14014887Schin */ 14024887Schin int pvo[2]; /* old pipe for multi-stage */ 14034887Schin int pvn[2]; /* current set up pipe */ 14044887Schin int savepipe = pipejob; 14054887Schin int showme = t->tre.tretyp&FSHOWME; 14064887Schin pid_t savepgid = job.curpgid; 14078462SApril.Chin@Sun.COM job.curpgid = 0; 14088462SApril.Chin@Sun.COM if(shp->subshell) 1409*8810SCasper.Dik@Sun.COM { 1410*8810SCasper.Dik@Sun.COM if(shp->subshare) 1411*8810SCasper.Dik@Sun.COM sh_subtmpfile(0); 1412*8810SCasper.Dik@Sun.COM else 1413*8810SCasper.Dik@Sun.COM sh_subfork(); 1414*8810SCasper.Dik@Sun.COM } 14158462SApril.Chin@Sun.COM shp->inpipe = pvo; 14168462SApril.Chin@Sun.COM shp->outpipe = pvn; 14174887Schin pvo[1] = -1; 14184887Schin if(sh_isoption(SH_PIPEFAIL)) 14194887Schin job.waitall = 1; 14204887Schin else 14214887Schin job.waitall |= !pipejob && sh_isstate(SH_MONITOR); 14224887Schin do 14234887Schin { 14244887Schin #if SHOPT_FASTPIPE 14258462SApril.Chin@Sun.COM type = pipe_exec(shp,pvn,t->lst.lstlef, errorflg); 14264887Schin #else 14274887Schin /* create the pipe */ 14284887Schin sh_pipe(pvn); 14294887Schin /* execute out part of pipe no wait */ 14304887Schin (t->lst.lstlef)->tre.tretyp |= showme; 14314887Schin type = sh_exec(t->lst.lstlef, errorflg); 14324887Schin #endif /* SHOPT_FASTPIPE */ 14334887Schin pipejob=1; 14344887Schin /* save the pipe stream-ids */ 14354887Schin pvo[0] = pvn[0]; 14364887Schin /* close out-part of pipe */ 14374887Schin sh_close(pvn[1]); 14384887Schin /* pipeline all in one process group */ 14394887Schin t = t->lst.lstrit; 14404887Schin } 14414887Schin /* repeat until end of pipeline */ 14424887Schin while(!type && t->tre.tretyp==TFIL); 14438462SApril.Chin@Sun.COM shp->inpipe = pvn; 14448462SApril.Chin@Sun.COM shp->outpipe = 0; 14454887Schin if(type == 0) 14464887Schin { 14474887Schin /* 14484887Schin * execute last element of pipeline 14494887Schin * in the current process 14504887Schin */ 14514887Schin ((Shnode_t*)t)->tre.tretyp |= showme; 14524887Schin sh_exec(t,flags); 14534887Schin } 14544887Schin else 14554887Schin /* execution failure, close pipe */ 14564887Schin sh_pclose(pvn); 14574887Schin pipejob = savepipe; 14584887Schin #ifdef SIGTSTP 14594887Schin if(!pipejob && sh_isstate(SH_MONITOR)) 14608462SApril.Chin@Sun.COM tcsetpgrp(JOBTTY,shp->pid); 14614887Schin #endif /*SIGTSTP */ 14624887Schin job.curpgid = savepgid; 14634887Schin break; 14644887Schin } 14654887Schin 14664887Schin case TLST: 14674887Schin { 14684887Schin /* a list of commands are executed here */ 14694887Schin do 14704887Schin { 14714887Schin sh_exec(t->lst.lstlef,errorflg|OPTIMIZE); 14724887Schin t = t->lst.lstrit; 14734887Schin } 14744887Schin while(t->tre.tretyp == TLST); 14754887Schin sh_exec(t,flags); 14764887Schin break; 14774887Schin } 14784887Schin 14794887Schin case TAND: 14804887Schin if(type&TTEST) 14814887Schin skipexitset++; 14824887Schin if(sh_exec(t->lst.lstlef,OPTIMIZE)==0) 14834887Schin sh_exec(t->lst.lstrit,flags); 14844887Schin break; 14854887Schin 14864887Schin case TORF: 14874887Schin if(type&TTEST) 14884887Schin skipexitset++; 14894887Schin if(sh_exec(t->lst.lstlef,OPTIMIZE)!=0) 14904887Schin sh_exec(t->lst.lstrit,flags); 14914887Schin break; 14924887Schin 14934887Schin case TFOR: /* for and select */ 14944887Schin { 14954887Schin register char **args; 14964887Schin register int nargs; 14974887Schin register Namval_t *np; 14984887Schin int flag = errorflg|OPTIMIZE_FLAG; 14994887Schin struct dolnod *argsav=0; 15004887Schin struct comnod *tp; 15014887Schin char *cp, *trap, *nullptr = 0; 15024887Schin int nameref, refresh=1; 15038462SApril.Chin@Sun.COM char *av[5]; 15044887Schin #if SHOPT_OPTIMIZE 15058462SApril.Chin@Sun.COM int jmpval = ((struct checkpt*)shp->jmplist)->mode; 15064887Schin struct checkpt buff; 15078462SApril.Chin@Sun.COM void *optlist = shp->optlist; 15088462SApril.Chin@Sun.COM shp->optlist = 0; 15094887Schin sh_tclear(t->for_.fortre); 15104887Schin sh_pushcontext(&buff,jmpval); 15114887Schin jmpval = sigsetjmp(buff.buff,0); 15124887Schin if(jmpval) 15134887Schin goto endfor; 15144887Schin #endif /* SHOPT_OPTIMIZE */ 15158462SApril.Chin@Sun.COM error_info.line = t->for_.forline-shp->st.firstline; 15164887Schin if(!(tp=t->for_.forlst)) 15174887Schin { 15188462SApril.Chin@Sun.COM args=shp->st.dolv+1; 15198462SApril.Chin@Sun.COM nargs = shp->st.dolc; 15208462SApril.Chin@Sun.COM argsav=sh_arguse(shp); 15214887Schin } 15224887Schin else 15234887Schin { 15248462SApril.Chin@Sun.COM args=sh_argbuild(shp,&argn,tp,0); 15254887Schin nargs = argn; 15264887Schin } 15278462SApril.Chin@Sun.COM np = nv_open(t->for_.fornam, shp->var_tree,NV_NOASSIGN|NV_NOARRAY|NV_VARNAME|NV_NOREF); 15284887Schin nameref = nv_isref(np)!=0; 15298462SApril.Chin@Sun.COM shp->st.loopcnt++; 15304887Schin cp = *args; 15318462SApril.Chin@Sun.COM while(cp && shp->st.execbrk==0) 15324887Schin { 15334887Schin if(t->tre.tretyp&COMSCAN) 15344887Schin { 15354887Schin char *val; 15364887Schin int save_prompt; 15374887Schin /* reuse register */ 15384887Schin if(refresh) 15394887Schin { 15404887Schin sh_menu(sfstderr,nargs,args); 15414887Schin refresh = 0; 15424887Schin } 15438462SApril.Chin@Sun.COM save_prompt = shp->nextprompt; 15448462SApril.Chin@Sun.COM shp->nextprompt = 3; 15458462SApril.Chin@Sun.COM shp->timeout = 0; 15468462SApril.Chin@Sun.COM shp->exitval=sh_readline(shp,&nullptr,0,1,1000*shp->st.tmout); 15478462SApril.Chin@Sun.COM shp->nextprompt = save_prompt; 15488462SApril.Chin@Sun.COM if(shp->exitval||sfeof(sfstdin)||sferror(sfstdin)) 15494887Schin { 15508462SApril.Chin@Sun.COM shp->exitval = 1; 15514887Schin break; 15524887Schin } 15538462SApril.Chin@Sun.COM if(!(val=nv_getval(sh_scoped(shp,REPLYNOD)))) 15544887Schin continue; 15554887Schin else 15564887Schin { 15574887Schin if(*(cp=val) == 0) 15584887Schin { 15594887Schin refresh++; 15604887Schin goto check; 15614887Schin } 15624887Schin while(type = *cp++) 15634887Schin if(type < '0' && type > '9') 15644887Schin break; 15654887Schin if(type!=0) 15664887Schin type = nargs; 15674887Schin else 15684887Schin type = (int)strtol(val, (char**)0, 10)-1; 15694887Schin if(type<0 || type >= nargs) 15704887Schin cp = ""; 15714887Schin else 15724887Schin cp = args[type]; 15734887Schin } 15744887Schin } 15754887Schin if(nameref) 15764887Schin nv_offattr(np,NV_REF); 15774887Schin else if(nv_isattr(np, NV_ARRAY)) 15784887Schin nv_putsub(np,NIL(char*),0L); 15794887Schin nv_putval(np,cp,0); 15804887Schin if(nameref) 15814887Schin nv_setref(np,(Dt_t*)0,NV_VARNAME); 15828462SApril.Chin@Sun.COM if(trap=shp->st.trap[SH_DEBUGTRAP]) 15834887Schin { 15844887Schin av[0] = (t->tre.tretyp&COMSCAN)?"select":"for"; 15854887Schin av[1] = t->for_.fornam; 15868462SApril.Chin@Sun.COM av[2] = "in"; 15874887Schin av[3] = cp; 15888462SApril.Chin@Sun.COM av[4] = 0; 15898462SApril.Chin@Sun.COM sh_debug(shp,trap,(char*)0,(char*)0,av,0); 15904887Schin } 15914887Schin sh_exec(t->for_.fortre,flag); 15924887Schin flag &= ~OPTIMIZE_FLAG; 15934887Schin if(t->tre.tretyp&COMSCAN) 15944887Schin { 15958462SApril.Chin@Sun.COM if((cp=nv_getval(sh_scoped(shp,REPLYNOD))) && *cp==0) 15964887Schin refresh++; 15974887Schin } 15984887Schin else 15994887Schin cp = *++args; 16004887Schin check: 16018462SApril.Chin@Sun.COM if(shp->st.breakcnt<0) 16028462SApril.Chin@Sun.COM shp->st.execbrk = (++shp->st.breakcnt !=0); 16034887Schin } 16044887Schin #if SHOPT_OPTIMIZE 16054887Schin endfor: 16064887Schin sh_popcontext(&buff); 16074887Schin sh_tclear(t->for_.fortre); 16088462SApril.Chin@Sun.COM sh_optclear(shp,optlist); 16094887Schin if(jmpval) 16108462SApril.Chin@Sun.COM siglongjmp(*shp->jmplist,jmpval); 16114887Schin #endif /*SHOPT_OPTIMIZE */ 16128462SApril.Chin@Sun.COM if(shp->st.breakcnt>0) 16138462SApril.Chin@Sun.COM shp->st.execbrk = (--shp->st.breakcnt !=0); 16148462SApril.Chin@Sun.COM shp->st.loopcnt--; 16158462SApril.Chin@Sun.COM sh_argfree(shp,argsav,0); 16164887Schin nv_close(np); 16174887Schin break; 16184887Schin } 16194887Schin 16204887Schin case TWH: /* while and until */ 16214887Schin { 16228462SApril.Chin@Sun.COM volatile int r=0; 16234887Schin int first = OPTIMIZE_FLAG; 16244887Schin Shnode_t *tt = t->wh.whtre; 16254887Schin #if SHOPT_FILESCAN 16264887Schin Sfio_t *iop=0; 16274887Schin int savein,fd; 16284887Schin #endif /*SHOPT_FILESCAN*/ 16294887Schin #if SHOPT_OPTIMIZE 16308462SApril.Chin@Sun.COM int jmpval = ((struct checkpt*)shp->jmplist)->mode; 16314887Schin struct checkpt buff; 16328462SApril.Chin@Sun.COM void *optlist = shp->optlist; 16338462SApril.Chin@Sun.COM shp->optlist = 0; 16344887Schin sh_tclear(t->wh.whtre); 16354887Schin sh_tclear(t->wh.dotre); 16364887Schin sh_pushcontext(&buff,jmpval); 16374887Schin jmpval = sigsetjmp(buff.buff,0); 16384887Schin if(jmpval) 16394887Schin goto endwhile; 16404887Schin #endif /* SHOPT_OPTIMIZE */ 16414887Schin #if SHOPT_FILESCAN 16424887Schin if(type==TWH && tt->tre.tretyp==TCOM && !tt->com.comarg && tt->com.comio) 16434887Schin { 16448462SApril.Chin@Sun.COM fd = sh_redirect(shp,tt->com.comio,3); 16454887Schin savein = dup(0); 16464887Schin if(fd==0) 16474887Schin fd = savein; 16484887Schin iop = sfnew(NULL,NULL,SF_UNBOUND,fd,SF_READ); 16494887Schin close(0); 16504887Schin open("/dev/null",O_RDONLY); 16518462SApril.Chin@Sun.COM shp->offsets[0] = -1; 16528462SApril.Chin@Sun.COM shp->offsets[1] = 0; 16534887Schin if(tt->com.comset) 16544887Schin nv_setlist(tt->com.comset,NV_IDENT|NV_ASSIGN); 16554887Schin } 16564887Schin #endif /*SHOPT_FILESCAN */ 16578462SApril.Chin@Sun.COM shp->st.loopcnt++; 16588462SApril.Chin@Sun.COM while(shp->st.execbrk==0) 16594887Schin { 16604887Schin #if SHOPT_FILESCAN 16614887Schin if(iop) 16624887Schin { 16638462SApril.Chin@Sun.COM if(!(shp->cur_line=sfgetr(iop,'\n',SF_STRING))) 16644887Schin break; 16654887Schin } 16664887Schin else 16674887Schin #endif /*SHOPT_FILESCAN */ 16684887Schin if((sh_exec(tt,first)==0)!=(type==TWH)) 16694887Schin break; 16704887Schin r = sh_exec(t->wh.dotre,first|errorflg); 16718462SApril.Chin@Sun.COM if(shp->st.breakcnt<0) 16728462SApril.Chin@Sun.COM shp->st.execbrk = (++shp->st.breakcnt !=0); 16734887Schin /* This is for the arithmetic for */ 16748462SApril.Chin@Sun.COM if(shp->st.execbrk==0 && t->wh.whinc) 16754887Schin sh_exec((Shnode_t*)t->wh.whinc,first); 16764887Schin first = 0; 16774887Schin errorflg &= ~OPTIMIZE_FLAG; 16784887Schin #if SHOPT_FILESCAN 16798462SApril.Chin@Sun.COM shp->offsets[0] = -1; 16808462SApril.Chin@Sun.COM shp->offsets[1] = 0; 16814887Schin #endif /*SHOPT_FILESCAN */ 16824887Schin } 16834887Schin #if SHOPT_OPTIMIZE 16844887Schin endwhile: 16854887Schin sh_popcontext(&buff); 16864887Schin sh_tclear(t->wh.whtre); 16874887Schin sh_tclear(t->wh.dotre); 16888462SApril.Chin@Sun.COM sh_optclear(shp,optlist); 16894887Schin if(jmpval) 16908462SApril.Chin@Sun.COM siglongjmp(*shp->jmplist,jmpval); 16914887Schin #endif /*SHOPT_OPTIMIZE */ 16928462SApril.Chin@Sun.COM if(shp->st.breakcnt>0) 16938462SApril.Chin@Sun.COM shp->st.execbrk = (--shp->st.breakcnt !=0); 16948462SApril.Chin@Sun.COM shp->st.loopcnt--; 16958462SApril.Chin@Sun.COM shp->exitval= r; 16964887Schin #if SHOPT_FILESCAN 16974887Schin if(iop) 16984887Schin { 16994887Schin sfclose(iop); 17004887Schin close(0); 17014887Schin dup(savein); 17028462SApril.Chin@Sun.COM shp->cur_line = 0; 17034887Schin } 17044887Schin #endif /*SHOPT_FILESCAN */ 17054887Schin break; 17064887Schin } 17074887Schin case TARITH: /* (( expression )) */ 17084887Schin { 17094887Schin register char *trap; 17108462SApril.Chin@Sun.COM char *arg[4]; 17118462SApril.Chin@Sun.COM error_info.line = t->ar.arline-shp->st.firstline; 17128462SApril.Chin@Sun.COM arg[0] = "(("; 17134887Schin if(!(t->ar.arexpr->argflag&ARG_RAW)) 17148462SApril.Chin@Sun.COM arg[1] = sh_macpat(shp,t->ar.arexpr,OPTIMIZE|ARG_ARITH); 17154887Schin else 17164887Schin arg[1] = t->ar.arexpr->argval; 17178462SApril.Chin@Sun.COM arg[2] = "))"; 17188462SApril.Chin@Sun.COM arg[3] = 0; 17198462SApril.Chin@Sun.COM if(trap=shp->st.trap[SH_DEBUGTRAP]) 17208462SApril.Chin@Sun.COM sh_debug(shp,trap,(char*)0, (char*)0, arg, ARG_ARITH); 17214887Schin if(sh_isoption(SH_XTRACE)) 17224887Schin { 17234887Schin sh_trace(NIL(char**),0); 17244887Schin sfprintf(sfstderr,"((%s))\n",arg[1]); 17254887Schin } 17264887Schin if(t->ar.arcomp) 17278462SApril.Chin@Sun.COM shp->exitval = !arith_exec((Arith_t*)t->ar.arcomp); 17284887Schin else 17298462SApril.Chin@Sun.COM shp->exitval = !sh_arith(arg[1]); 17304887Schin break; 17314887Schin } 17324887Schin 17334887Schin case TIF: 17344887Schin if(sh_exec(t->if_.iftre,OPTIMIZE)==0) 17354887Schin sh_exec(t->if_.thtre,flags); 17364887Schin else if(t->if_.eltre) 17374887Schin sh_exec(t->if_.eltre, flags); 17384887Schin else 17398462SApril.Chin@Sun.COM shp->exitval=0; /* force zero exit for if-then-fi */ 17404887Schin break; 17414887Schin 17424887Schin case TSW: 17434887Schin { 17444887Schin Shnode_t *tt = (Shnode_t*)t; 17458462SApril.Chin@Sun.COM char *trap, *r = sh_macpat(shp,tt->sw.swarg,OPTIMIZE); 17468462SApril.Chin@Sun.COM error_info.line = t->sw.swline-shp->st.firstline; 17474887Schin t= (Shnode_t*)(tt->sw.swlst); 17488462SApril.Chin@Sun.COM if(trap=shp->st.trap[SH_DEBUGTRAP]) 17494887Schin { 17508462SApril.Chin@Sun.COM char *av[4]; 17518462SApril.Chin@Sun.COM av[0] = "case"; 17524887Schin av[1] = r; 17538462SApril.Chin@Sun.COM av[2] = "in"; 17548462SApril.Chin@Sun.COM av[3] = 0; 17558462SApril.Chin@Sun.COM sh_debug(shp,trap, (char*)0, (char*)0, av, 0); 17564887Schin } 17574887Schin while(t) 17584887Schin { 17594887Schin register struct argnod *rex=(struct argnod*)t->reg.regptr; 17604887Schin while(rex) 17614887Schin { 17624887Schin register char *s; 17634887Schin if(rex->argflag&ARG_MAC) 17644887Schin { 17658462SApril.Chin@Sun.COM s = sh_macpat(shp,rex,OPTIMIZE|ARG_EXP); 17664887Schin while(*s=='\\' && s[1]==0) 17674887Schin s+=2; 17684887Schin } 17694887Schin else 17704887Schin s = rex->argval; 17714887Schin type = (rex->argflag&ARG_RAW); 17724887Schin if((type && strcmp(r,s)==0) || 17734887Schin (!type && (strmatch(r,s) 17744887Schin || trim_eq(r,s)))) 17754887Schin { 17764887Schin do sh_exec(t->reg.regcom,(t->reg.regflag?0:flags)); 17774887Schin while(t->reg.regflag && 17784887Schin (t=(Shnode_t*)t->reg.regnxt)); 17794887Schin t=0; 17804887Schin break; 17814887Schin } 17824887Schin else 17834887Schin rex=rex->argnxt.ap; 17844887Schin } 17854887Schin if(t) 17864887Schin t=(Shnode_t*)t->reg.regnxt; 17874887Schin } 17884887Schin break; 17894887Schin } 17904887Schin 17914887Schin case TTIME: 17924887Schin { 17934887Schin /* time the command */ 17944887Schin struct tms before,after; 17954887Schin const char *format = e_timeformat; 17964887Schin clock_t at, tm[3]; 17974887Schin #ifdef timeofday 17984887Schin struct timeval tb,ta; 17994887Schin #else 18004887Schin clock_t bt; 18014887Schin #endif /* timeofday */ 18024887Schin if(type!=TTIME) 18034887Schin { 18044887Schin sh_exec(t->par.partre,OPTIMIZE); 18058462SApril.Chin@Sun.COM shp->exitval = !shp->exitval; 18064887Schin break; 18074887Schin } 18084887Schin if(t->par.partre) 18094887Schin { 18104887Schin long timer_on; 18114887Schin timer_on = sh_isstate(SH_TIMING); 18124887Schin #ifdef timeofday 18134887Schin timeofday(&tb); 18144887Schin times(&before); 18154887Schin #else 18164887Schin bt = times(&before); 18174887Schin #endif /* timeofday */ 18184887Schin job.waitall = 1; 18194887Schin sh_onstate(SH_TIMING); 18204887Schin sh_exec(t->par.partre,OPTIMIZE); 18214887Schin if(!timer_on) 18224887Schin sh_offstate(SH_TIMING); 18234887Schin job.waitall = 0; 18244887Schin } 18254887Schin else 18264887Schin { 18274887Schin #ifndef timeofday 18284887Schin bt = 0; 18294887Schin #endif /* timeofday */ 18304887Schin before.tms_utime = before.tms_cutime = 0; 18314887Schin before.tms_stime = before.tms_cstime = 0; 18324887Schin } 18334887Schin #ifdef timeofday 18344887Schin times(&after); 18354887Schin timeofday(&ta); 18368462SApril.Chin@Sun.COM at = shp->lim.clk_tck*(ta.tv_sec-tb.tv_sec); 18378462SApril.Chin@Sun.COM at += ((shp->lim.clk_tck*(((1000000L/2)/shp->lim.clk_tck)+(ta.tv_usec-tb.tv_usec)))/1000000L); 18384887Schin #else 18394887Schin at = times(&after) - bt; 18404887Schin #endif /* timeofday */ 18414887Schin tm[0] = at; 18424887Schin if(t->par.partre) 18434887Schin { 18448462SApril.Chin@Sun.COM Namval_t *np = nv_open("TIMEFORMAT",shp->var_tree,NV_NOADD); 18454887Schin if(np) 18464887Schin { 18474887Schin format = nv_getval(np); 18484887Schin nv_close(np); 18494887Schin } 18504887Schin if(!format) 18514887Schin format = e_timeformat; 18524887Schin } 18534887Schin else 18544887Schin format = strchr(format+1,'\n')+1; 18554887Schin tm[1] = after.tms_utime - before.tms_utime; 18564887Schin tm[1] += after.tms_cutime - before.tms_cutime; 18574887Schin tm[2] = after.tms_stime - before.tms_stime; 18584887Schin tm[2] += after.tms_cstime - before.tms_cstime; 18594887Schin if(format && *format) 18608462SApril.Chin@Sun.COM p_time(shp,sfstderr,sh_translate(format),tm); 18614887Schin break; 18624887Schin } 18634887Schin case TFUN: 18644887Schin { 18654887Schin register Namval_t *np; 18664887Schin register struct slnod *slp; 18674887Schin register char *fname = ((struct functnod*)t)->functnam; 18684887Schin register char *cp = strrchr(fname,'.'); 18694887Schin register Namval_t *npv=0; 18704887Schin #if SHOPT_NAMESPACE 18714887Schin if(t->tre.tretyp==TNSPACE) 18724887Schin { 18734887Schin Dt_t *root,*oldroot, *top=0; 18748462SApril.Chin@Sun.COM Namval_t *oldnspace = shp->namespace; 18758462SApril.Chin@Sun.COM int offset = stktell(stkp); 18768462SApril.Chin@Sun.COM long optindex = shp->st.optindex; 18774887Schin if(cp) 18784887Schin errormsg(SH_DICT,ERROR_exit(1),e_ident,fname); 18798462SApril.Chin@Sun.COM sfputc(stkp,'.'); 18808462SApril.Chin@Sun.COM sfputr(stkp,fname,0); 18818462SApril.Chin@Sun.COM np = nv_open(stkptr(stkp,offset),shp->var_base,NV_NOASSIGN|NV_NOARRAY|NV_VARNAME); 18828462SApril.Chin@Sun.COM offset = stktell(stkp); 18838462SApril.Chin@Sun.COM shp->namespace = np; 18844887Schin if(!(root=nv_dict(np))) 18854887Schin { 18864887Schin root = dtopen(&_Nvdisc,Dtoset); 18874887Schin nv_putval(np,(char*)root,NV_TABLE|NV_NOFREE); 18888462SApril.Chin@Sun.COM shp->st.optindex = 1; 18894887Schin } 18908462SApril.Chin@Sun.COM if(oldnspace && dtvnext(dtvnext(shp->var_tree))) 18918462SApril.Chin@Sun.COM top = dtview(shp->var_tree,0); 18928462SApril.Chin@Sun.COM else if(dtvnext(shp->var_tree)) 18938462SApril.Chin@Sun.COM top = dtview(shp->var_tree,0); 18948462SApril.Chin@Sun.COM oldroot = shp->var_tree; 18958462SApril.Chin@Sun.COM dtview(root,shp->var_base); 18968462SApril.Chin@Sun.COM shp->var_tree = root; 18974887Schin if(top) 18988462SApril.Chin@Sun.COM dtview(shp->var_tree,top); 18994887Schin sh_exec(t->for_.fortre,flags); 19008462SApril.Chin@Sun.COM if(dtvnext(shp->var_tree)) 19018462SApril.Chin@Sun.COM top = dtview(shp->var_tree,0); 19028462SApril.Chin@Sun.COM shp->var_tree = oldroot; 19034887Schin if(top) 19048462SApril.Chin@Sun.COM dtview(top,shp->var_tree); 19058462SApril.Chin@Sun.COM shp->namespace = oldnspace; 19068462SApril.Chin@Sun.COM shp->st.optindex = optindex; 19074887Schin break; 19084887Schin } 19094887Schin #endif /* SHOPT_NAMESPACE */ 19104887Schin /* look for discipline functions */ 19118462SApril.Chin@Sun.COM error_info.line = t->funct.functline-shp->st.firstline; 19124887Schin /* Function names cannot be special builtin */ 19138462SApril.Chin@Sun.COM if(cp || shp->prefix) 19144887Schin { 19158462SApril.Chin@Sun.COM int offset = stktell(stkp); 19168462SApril.Chin@Sun.COM if(shp->prefix) 19174887Schin { 19188462SApril.Chin@Sun.COM cp = shp->prefix; 19198462SApril.Chin@Sun.COM shp->prefix = 0; 19208462SApril.Chin@Sun.COM npv = nv_open(cp,shp->var_tree,NV_NOASSIGN|NV_NOARRAY|NV_VARNAME); 19218462SApril.Chin@Sun.COM shp->prefix = cp; 19224887Schin cp = fname; 19234887Schin } 19244887Schin else 19254887Schin { 19268462SApril.Chin@Sun.COM sfwrite(stkp,fname,cp++-fname); 19278462SApril.Chin@Sun.COM sfputc(stkp,0); 19288462SApril.Chin@Sun.COM npv = nv_open(stkptr(stkp,offset),shp->var_tree,NV_NOASSIGN|NV_NOARRAY|NV_VARNAME); 19294887Schin } 19308462SApril.Chin@Sun.COM offset = stktell(stkp); 19318462SApril.Chin@Sun.COM sfprintf(stkp,"%s.%s%c",nv_name(npv),cp,0); 19328462SApril.Chin@Sun.COM fname = stkptr(stkp,offset); 19334887Schin } 19348462SApril.Chin@Sun.COM else if((np=nv_search(fname,shp->bltin_tree,0)) && nv_isattr(np,BLT_SPC)) 19354887Schin errormsg(SH_DICT,ERROR_exit(1),e_badfun,fname); 19364887Schin #if SHOPT_NAMESPACE 19378462SApril.Chin@Sun.COM else if(shp->namespace) 19384887Schin { 19398462SApril.Chin@Sun.COM int offset = stktell(stkp); 19408462SApril.Chin@Sun.COM sfputr(stkp,nv_name(shp->namespace),-1); 19418462SApril.Chin@Sun.COM sfputc(stkp,'.'); 19428462SApril.Chin@Sun.COM sfputr(stkp,fname,0); 19438462SApril.Chin@Sun.COM fname = stkptr(stkp,offset); 19444887Schin } 19454887Schin #endif /* SHOPT_NAMESPACE */ 19464887Schin np = nv_open(fname,sh_subfuntree(1),NV_NOASSIGN|NV_NOARRAY|NV_VARNAME|NV_NOSCOPE); 19474887Schin if(npv) 19484887Schin { 19498462SApril.Chin@Sun.COM Namval_t *tp = npv; 19508462SApril.Chin@Sun.COM if(!shp->mktype) 19518462SApril.Chin@Sun.COM { 19528462SApril.Chin@Sun.COM if(shp->typeinit) 19538462SApril.Chin@Sun.COM { 19548462SApril.Chin@Sun.COM if(tp=nv_open(shp->typeinit->nvname,shp->typedict,NV_IDENT|NV_NOFAIL)) 19558462SApril.Chin@Sun.COM nv_close(npv); 19568462SApril.Chin@Sun.COM else 19578462SApril.Chin@Sun.COM tp = npv; 19588462SApril.Chin@Sun.COM } 19598462SApril.Chin@Sun.COM cp = nv_setdisc(tp,cp,np,(Namfun_t*)tp); 19608462SApril.Chin@Sun.COM } 19618462SApril.Chin@Sun.COM nv_close(tp); 19624887Schin if(!cp) 19634887Schin errormsg(SH_DICT,ERROR_exit(1),e_baddisc,fname); 19644887Schin } 19654887Schin if(np->nvalue.rp) 19664887Schin { 19674887Schin slp = (struct slnod*)np->nvenv; 19684887Schin sh_funstaks(slp->slchild,-1); 19694887Schin stakdelete(slp->slptr); 19708462SApril.Chin@Sun.COM if(shp->funload) 19718462SApril.Chin@Sun.COM { 19728462SApril.Chin@Sun.COM free((void*)np->nvalue.rp); 19738462SApril.Chin@Sun.COM np->nvalue.rp = 0; 19748462SApril.Chin@Sun.COM } 19758462SApril.Chin@Sun.COM 19764887Schin } 19778462SApril.Chin@Sun.COM if(!np->nvalue.rp) 19788462SApril.Chin@Sun.COM { 19798462SApril.Chin@Sun.COM np->nvalue.rp = new_of(struct Ufunction,shp->funload?sizeof(Dtlink_t):0); 19808462SApril.Chin@Sun.COM memset((void*)np->nvalue.rp,0,sizeof(struct Ufunction)); 19818462SApril.Chin@Sun.COM } 19824887Schin if(t->funct.functstak) 19834887Schin { 19848462SApril.Chin@Sun.COM static Dtdisc_t _Rpdisc = 19858462SApril.Chin@Sun.COM { 19868462SApril.Chin@Sun.COM offsetof(struct Ufunction,fname), -1, sizeof(struct Ufunction) 19878462SApril.Chin@Sun.COM }; 19884887Schin struct functnod *fp; 19894887Schin slp = t->funct.functstak; 19904887Schin sh_funstaks(slp->slchild,1); 19914887Schin staklink(slp->slptr); 19924887Schin np->nvenv = (char*)slp; 19934887Schin nv_funtree(np) = (int*)(t->funct.functtre); 19944887Schin np->nvalue.rp->hoffset = t->funct.functloc; 19954887Schin np->nvalue.rp->lineno = t->funct.functline; 19968462SApril.Chin@Sun.COM np->nvalue.rp->nspace = shp->namespace; 19974887Schin np->nvalue.rp->fname = 0; 19988462SApril.Chin@Sun.COM np->nvalue.rp->fdict = shp->fun_tree; 19994887Schin fp = (struct functnod*)(slp+1); 20004887Schin if(fp->functtyp==(TFUN|FAMP)) 20014887Schin np->nvalue.rp->fname = fp->functnam; 20024887Schin nv_setsize(np,fp->functline); 20034887Schin nv_offattr(np,NV_FPOSIX); 20048462SApril.Chin@Sun.COM if(shp->funload) 20058462SApril.Chin@Sun.COM { 20068462SApril.Chin@Sun.COM struct Ufunction *rp = np->nvalue.rp; 20078462SApril.Chin@Sun.COM rp->np = np; 20088462SApril.Chin@Sun.COM if(!shp->fpathdict) 20098462SApril.Chin@Sun.COM shp->fpathdict = dtopen(&_Rpdisc,Dtbag); 20108462SApril.Chin@Sun.COM if(shp->fpathdict) 20118462SApril.Chin@Sun.COM dtinsert(shp->fpathdict,rp); 20128462SApril.Chin@Sun.COM } 20134887Schin } 20144887Schin else 20154887Schin nv_unset(np); 20164887Schin if(type&FPOSIX) 20174887Schin nv_onattr(np,NV_FUNCTION|NV_FPOSIX); 20184887Schin else 20194887Schin nv_onattr(np,NV_FUNCTION); 20204887Schin if(type&FPIN) 20214887Schin nv_onattr(np,NV_FTMP); 20228462SApril.Chin@Sun.COM if(type&FOPTGET) 20238462SApril.Chin@Sun.COM nv_onattr(np,NV_OPTGET); 20244887Schin break; 20254887Schin } 20264887Schin 20274887Schin /* new test compound command */ 20284887Schin case TTST: 20294887Schin { 20304887Schin register int n; 20314887Schin register char *left; 20324887Schin int negate = (type&TNEGATE)!=0; 20334887Schin if(type&TTEST) 20344887Schin skipexitset++; 20358462SApril.Chin@Sun.COM error_info.line = t->tst.tstline-shp->st.firstline; 20364887Schin echeck = 1; 20374887Schin if((type&TPAREN)==TPAREN) 20384887Schin { 20394887Schin sh_exec(t->lst.lstlef,OPTIMIZE); 20408462SApril.Chin@Sun.COM n = !shp->exitval; 20414887Schin } 20424887Schin else 20434887Schin { 20444887Schin register int traceon=0; 20454887Schin register char *right; 20464887Schin register char *trap; 20474887Schin char *argv[6]; 20484887Schin n = type>>TSHIFT; 20498462SApril.Chin@Sun.COM left = sh_macpat(shp,&(t->lst.lstlef->arg),OPTIMIZE); 20504887Schin if(type&TBINARY) 20518462SApril.Chin@Sun.COM right = sh_macpat(shp,&(t->lst.lstrit->arg),((n==TEST_PEQ||n==TEST_PNE)?ARG_EXP:0)|OPTIMIZE); 20528462SApril.Chin@Sun.COM if(trap=shp->st.trap[SH_DEBUGTRAP]) 20534887Schin argv[0] = (type&TNEGATE)?((char*)e_tstbegin):"[["; 20544887Schin if(sh_isoption(SH_XTRACE)) 20554887Schin { 20564887Schin traceon = sh_trace(NIL(char**),0); 20574887Schin sfwrite(sfstderr,e_tstbegin,(type&TNEGATE?5:3)); 20584887Schin } 20594887Schin if(type&TUNARY) 20604887Schin { 20614887Schin if(traceon) 20624887Schin sfprintf(sfstderr,"-%c %s",n,sh_fmtq(left)); 20634887Schin if(trap) 20644887Schin { 20654887Schin char unop[3]; 20664887Schin unop[0] = '-'; 20674887Schin unop[1] = n; 20684887Schin unop[2] = 0; 20694887Schin argv[1] = unop; 20704887Schin argv[2] = left; 20714887Schin argv[3] = "]]"; 20724887Schin argv[4] = 0; 20738462SApril.Chin@Sun.COM sh_debug(shp,trap,(char*)0,(char*)0,argv, 0); 20744887Schin } 20754887Schin n = test_unop(n,left); 20764887Schin } 20774887Schin else if(type&TBINARY) 20784887Schin { 20794887Schin char *op; 20804887Schin int pattern = 0; 20814887Schin if(trap || traceon) 20824887Schin op = (char*)(shtab_testops+(n&037)-1)->sh_name; 20834887Schin type >>= TSHIFT; 20844887Schin if(type==TEST_PEQ || type==TEST_PNE) 20854887Schin pattern=ARG_EXP; 20864887Schin if(trap) 20874887Schin { 20884887Schin argv[1] = left; 20894887Schin argv[2] = op; 20904887Schin argv[3] = right; 20914887Schin argv[4] = "]]"; 20924887Schin argv[5] = 0; 20938462SApril.Chin@Sun.COM sh_debug(shp,trap,(char*)0,(char*)0,argv, pattern); 20944887Schin } 20954887Schin n = test_binop(n,left,right); 20964887Schin if(traceon) 20974887Schin { 20984887Schin sfprintf(sfstderr,"%s %s ",sh_fmtq(left),op); 20994887Schin if(pattern) 21004887Schin out_pattern(sfstderr,right,-1); 21014887Schin else 21024887Schin sfputr(sfstderr,sh_fmtq(right),-1); 21034887Schin } 21044887Schin } 21054887Schin if(traceon) 21064887Schin sfwrite(sfstderr,e_tstend,4); 21074887Schin } 21088462SApril.Chin@Sun.COM shp->exitval = ((!n)^negate); 21094887Schin if(!skipexitset) 21104887Schin exitset(); 21114887Schin break; 21124887Schin } 21134887Schin } 21148462SApril.Chin@Sun.COM if(shp->trapnote || (shp->exitval && sh_isstate(SH_ERREXIT)) && 21154887Schin t && echeck) 21164887Schin sh_chktrap(); 21174887Schin /* set $_ */ 21184887Schin if(mainloop && com0) 21194887Schin { 21204887Schin /* store last argument here if it fits */ 21214887Schin static char lastarg[32]; 21224887Schin if(sh_isstate(SH_FORKED)) 21238462SApril.Chin@Sun.COM sh_done(shp,0); 21248462SApril.Chin@Sun.COM if(shp->lastarg!= lastarg && shp->lastarg) 21258462SApril.Chin@Sun.COM free(shp->lastarg); 21268462SApril.Chin@Sun.COM if(strlen(comn) < sizeof(lastarg)) 21274887Schin { 21284887Schin nv_onattr(L_ARGNOD,NV_NOFREE); 21298462SApril.Chin@Sun.COM shp->lastarg = strcpy(lastarg,comn); 21304887Schin } 21314887Schin else 21324887Schin { 21334887Schin nv_offattr(L_ARGNOD,NV_NOFREE); 21348462SApril.Chin@Sun.COM shp->lastarg = strdup(comn); 21354887Schin } 21364887Schin } 21374887Schin if(!skipexitset) 21384887Schin exitset(); 21394887Schin if(!(OPTIMIZE)) 21404887Schin { 21418462SApril.Chin@Sun.COM if(sav != stkptr(stkp,0)) 21428462SApril.Chin@Sun.COM stkset(stkp,sav,0); 21438462SApril.Chin@Sun.COM else if(stktell(stkp)) 21448462SApril.Chin@Sun.COM stkseek(stkp,0); 21454887Schin } 21468462SApril.Chin@Sun.COM if(shp->trapnote&SH_SIGSET) 21478462SApril.Chin@Sun.COM sh_exit(SH_EXITSIG|shp->lastsig); 21484887Schin if(was_interactive) 21494887Schin sh_onstate(SH_INTERACTIVE); 21504887Schin if(was_monitor && sh_isoption(SH_MONITOR)) 21514887Schin sh_onstate(SH_MONITOR); 21524887Schin if(was_errexit) 21534887Schin sh_onstate(SH_ERREXIT); 21544887Schin } 21558462SApril.Chin@Sun.COM return(shp->exitval); 21568462SApril.Chin@Sun.COM } 21578462SApril.Chin@Sun.COM 21588462SApril.Chin@Sun.COM int sh_run(int argn, char *argv[]) 21598462SApril.Chin@Sun.COM { 21608462SApril.Chin@Sun.COM register struct dolnod *dp; 21618462SApril.Chin@Sun.COM register struct comnod *t = (struct comnod*)stakalloc(sizeof(struct comnod)); 21628462SApril.Chin@Sun.COM int savtop = staktell(); 21638462SApril.Chin@Sun.COM char *savptr = stakfreeze(0); 21648462SApril.Chin@Sun.COM Opt_t *op, *np = optctx(0, 0); 21658462SApril.Chin@Sun.COM Shbltin_t bltindata; 21668462SApril.Chin@Sun.COM bltindata = sh.bltindata; 21678462SApril.Chin@Sun.COM op = optctx(np, 0); 21688462SApril.Chin@Sun.COM memset(t, 0, sizeof(struct comnod)); 21698462SApril.Chin@Sun.COM dp = (struct dolnod*)stakalloc((unsigned)sizeof(struct dolnod) + ARG_SPARE*sizeof(char*) + argn*sizeof(char*)); 21708462SApril.Chin@Sun.COM dp->dolnum = argn; 21718462SApril.Chin@Sun.COM dp->dolbot = ARG_SPARE; 21728462SApril.Chin@Sun.COM memcpy(dp->dolval+ARG_SPARE, argv, (argn+1)*sizeof(char*)); 21738462SApril.Chin@Sun.COM t->comarg = (struct argnod*)dp; 21748462SApril.Chin@Sun.COM if(!strchr(argv[0],'/')) 21758462SApril.Chin@Sun.COM t->comnamp = (void*)nv_bfsearch(argv[0],sh.fun_tree,(Namval_t**)&t->comnamq,(char**)0); 21768462SApril.Chin@Sun.COM argn=sh_exec((Shnode_t*)t,sh_isstate(SH_ERREXIT)); 21778462SApril.Chin@Sun.COM optctx(op,np); 21788462SApril.Chin@Sun.COM sh.bltindata = bltindata; 21798462SApril.Chin@Sun.COM if(savptr!=stakptr(0)) 21808462SApril.Chin@Sun.COM stakset(savptr,savtop); 21818462SApril.Chin@Sun.COM else 21828462SApril.Chin@Sun.COM stakseek(savtop); 21838462SApril.Chin@Sun.COM return(argn); 21844887Schin } 21854887Schin 21864887Schin /* 21874887Schin * test for equality with second argument trimmed 21884887Schin * returns 1 if r == trim(s) otherwise 0 21894887Schin */ 21904887Schin 21914887Schin static int trim_eq(register const char *r,register const char *s) 21924887Schin { 21934887Schin register char c; 21944887Schin while(c = *s++) 21954887Schin { 21964887Schin if(c=='\\') 21974887Schin c = *s++; 21984887Schin if(c && c != *r++) 21994887Schin return(0); 22004887Schin } 22014887Schin return(*r==0); 22024887Schin } 22034887Schin 22044887Schin /* 22054887Schin * print out the command line if set -x is on 22064887Schin */ 22074887Schin 22084887Schin int sh_trace(register char *argv[], register int nl) 22094887Schin { 22108462SApril.Chin@Sun.COM Shell_t *shp = &sh; 22114887Schin register char *cp; 22124887Schin register int bracket = 0; 22138462SApril.Chin@Sun.COM int decl = (nl&2); 22148462SApril.Chin@Sun.COM nl &= ~2; 22154887Schin if(sh_isoption(SH_XTRACE)) 22164887Schin { 22174887Schin /* make this trace atomic */ 22184887Schin sfset(sfstderr,SF_SHARE|SF_PUBLIC,0); 22198462SApril.Chin@Sun.COM if(!(cp=nv_getval(sh_scoped(shp,PS4NOD)))) 22204887Schin cp = "+ "; 22214887Schin else 22224887Schin { 22234887Schin sh_offoption(SH_XTRACE); 22248462SApril.Chin@Sun.COM cp = sh_mactry(shp,cp); 22254887Schin sh_onoption(SH_XTRACE); 22264887Schin } 22274887Schin if(*cp) 22284887Schin sfputr(sfstderr,cp,-1); 22294887Schin if(argv) 22304887Schin { 22314887Schin char *argv0 = *argv; 22324887Schin nl = (nl?'\n':-1); 22334887Schin /* don't quote [ and [[ */ 22344887Schin if(*(cp=argv[0])=='[' && (!cp[1] || !cp[2]&&cp[1]=='[')) 22354887Schin { 22364887Schin sfputr(sfstderr,cp,*++argv?' ':nl); 22374887Schin bracket = 1; 22384887Schin } 22394887Schin while(cp = *argv++) 22404887Schin { 22414887Schin if(bracket==0 || *argv || *cp!=']') 22424887Schin cp = sh_fmtq(cp); 22438462SApril.Chin@Sun.COM if(decl && shp->prefix && cp!=argv0 && *cp!='-') 22444887Schin { 22454887Schin if(*cp=='.' && cp[1]==0) 22468462SApril.Chin@Sun.COM cp = shp->prefix; 22474887Schin else 22488462SApril.Chin@Sun.COM sfputr(sfstderr,shp->prefix,'.'); 22494887Schin } 22504887Schin sfputr(sfstderr,cp,*argv?' ':nl); 22514887Schin } 22524887Schin sfset(sfstderr,SF_SHARE|SF_PUBLIC,1); 22534887Schin } 22544887Schin return(1); 22554887Schin } 22564887Schin return(0); 22574887Schin } 22584887Schin 22594887Schin /* 22604887Schin * This routine creates a subshell by calling fork() or vfork() 22614887Schin * If ((flags&COMASK)==TCOM), then vfork() is permitted 22624887Schin * If fork fails, the shell sleeps for exponentially longer periods 22634887Schin * and tries again until a limit is reached. 22644887Schin * SH_FORKLIM is the max period between forks - power of 2 usually. 22654887Schin * Currently shell tries after 2,4,8,16, and 32 seconds and then quits 22664887Schin * Failures cause the routine to error exit. 22674887Schin * Parent links to here-documents are removed by the child 22684887Schin * Traps are reset by the child 22694887Schin * The process-id of the child is returned to the parent, 0 to the child. 22704887Schin */ 22714887Schin 22724887Schin static void timed_out(void *handle) 22734887Schin { 22744887Schin NOT_USED(handle); 22754887Schin timeout = 0; 22764887Schin } 22774887Schin 22784887Schin 22794887Schin /* 22804887Schin * called by parent and child after fork by sh_fork() 22814887Schin */ 22824887Schin pid_t _sh_fork(register pid_t parent,int flags,int *jobid) 22834887Schin { 22844887Schin static long forkcnt = 1000L; 22858462SApril.Chin@Sun.COM Shell_t *shp = &sh; 22864887Schin pid_t curpgid = job.curpgid; 22874887Schin pid_t postid = (flags&FAMP)?0:curpgid; 22888462SApril.Chin@Sun.COM int sig,nochild; 22894887Schin if(parent<0) 22904887Schin { 22918462SApril.Chin@Sun.COM sh_sigcheck(); 22924887Schin if((forkcnt *= 2) > 1000L*SH_FORKLIM) 22934887Schin { 22944887Schin forkcnt=1000L; 22954887Schin errormsg(SH_DICT,ERROR_system(ERROR_NOEXEC),e_nofork); 22964887Schin } 22974887Schin timeout = (void*)sh_timeradd(forkcnt, 0, timed_out, NIL(void*)); 22988462SApril.Chin@Sun.COM nochild = job_wait((pid_t)1); 22994887Schin if(timeout) 23004887Schin { 23018462SApril.Chin@Sun.COM if(nochild) 23028462SApril.Chin@Sun.COM pause(); 23038462SApril.Chin@Sun.COM else if(forkcnt>1000L) 23048462SApril.Chin@Sun.COM forkcnt /= 2; 23054887Schin timerdel(timeout); 23068462SApril.Chin@Sun.COM timeout = 0; 23074887Schin } 23084887Schin return(-1); 23094887Schin } 23108462SApril.Chin@Sun.COM forkcnt = 1000L; 23114887Schin if(parent) 23124887Schin { 23138462SApril.Chin@Sun.COM int myjob,waitall=job.waitall; 23148462SApril.Chin@Sun.COM shp->nforks++; 23154887Schin if(job.toclear) 23164887Schin job_clear(); 23178462SApril.Chin@Sun.COM job.waitall = waitall; 23184887Schin #ifdef JOBS 23194887Schin /* first process defines process group */ 23204887Schin if(sh_isstate(SH_MONITOR)) 23214887Schin { 23224887Schin /* 23234887Schin * errno==EPERM means that an earlier processes 23244887Schin * completed. Make parent the job group id. 23254887Schin */ 23264887Schin if(postid==0) 23274887Schin job.curpgid = parent; 23284887Schin if(job.jobcontrol || (flags&FAMP)) 23294887Schin { 23304887Schin if(setpgid(parent,job.curpgid)<0 && errno==EPERM) 23314887Schin setpgid(parent,parent); 23324887Schin } 23334887Schin } 23344887Schin #endif /* JOBS */ 23354887Schin if(!sh_isstate(SH_MONITOR) && job.waitall && postid==0) 23364887Schin job.curpgid = parent; 23374887Schin if(flags&FCOOP) 23388462SApril.Chin@Sun.COM shp->cpid = parent; 23394887Schin myjob = job_post(parent,postid); 23404887Schin if(flags&FAMP) 23414887Schin job.curpgid = curpgid; 23424887Schin if(jobid) 23434887Schin *jobid = myjob; 23444887Schin return(parent); 23454887Schin } 23464887Schin #if !_std_malloc 23474887Schin vmtrace(-1); 23484887Schin #endif 23494887Schin /* This is the child process */ 23508462SApril.Chin@Sun.COM if(shp->trapnote&SH_SIGTERM) 23514887Schin sh_exit(SH_EXITSIG|SIGTERM); 23528462SApril.Chin@Sun.COM shp->nforks=0; 23534887Schin timerdel(NIL(void*)); 23544887Schin #ifdef JOBS 23554887Schin if(!job.jobcontrol && !(flags&FAMP)) 23564887Schin sh_offstate(SH_MONITOR); 23574887Schin if(sh_isstate(SH_MONITOR)) 23584887Schin { 23594887Schin parent = getpid(); 23604887Schin if(postid==0) 23614887Schin job.curpgid = parent; 23624887Schin while(setpgid(0,job.curpgid)<0 && job.curpgid!=parent) 23634887Schin job.curpgid = parent; 23644887Schin # ifdef SIGTSTP 23654887Schin if(job.curpgid==parent && !(flags&FAMP)) 23664887Schin tcsetpgrp(job.fd,job.curpgid); 23674887Schin # endif /* SIGTSTP */ 23684887Schin } 23694887Schin # ifdef SIGTSTP 23704887Schin if(job.jobcontrol) 23714887Schin { 23724887Schin signal(SIGTTIN,SIG_DFL); 23734887Schin signal(SIGTTOU,SIG_DFL); 23744887Schin signal(SIGTSTP,SIG_DFL); 23754887Schin } 23764887Schin # endif /* SIGTSTP */ 23774887Schin job.jobcontrol = 0; 23784887Schin #endif /* JOBS */ 23794887Schin job.toclear = 1; 23808462SApril.Chin@Sun.COM shp->login_sh = 0; 23814887Schin sh_offoption(SH_LOGIN_SHELL); 23824887Schin sh_onstate(SH_FORKED); 23834887Schin sh_onstate(SH_NOLOG); 23848462SApril.Chin@Sun.COM if (shp->fn_reset) 23858462SApril.Chin@Sun.COM shp->fn_depth = shp->fn_reset = 0; 23864887Schin #if SHOPT_ACCT 23874887Schin sh_accsusp(); 23884887Schin #endif /* SHOPT_ACCT */ 23894887Schin /* Reset remaining signals to parent */ 23904887Schin /* except for those `lost' by trap */ 23914887Schin sh_sigreset(2); 23928462SApril.Chin@Sun.COM shp->subshell = 0; 23938462SApril.Chin@Sun.COM if((flags&FAMP) && shp->coutpipe>1) 23948462SApril.Chin@Sun.COM sh_close(shp->coutpipe); 23958462SApril.Chin@Sun.COM sig = shp->savesig; 23968462SApril.Chin@Sun.COM shp->savesig = 0; 23974887Schin if(sig>0) 23984887Schin sh_fault(sig); 23994887Schin sh_sigcheck(); 24004887Schin return(0); 24014887Schin } 24024887Schin 24034887Schin pid_t sh_fork(int flags, int *jobid) 24044887Schin { 24054887Schin register pid_t parent; 24064887Schin register int sig; 24074887Schin #if SHOPT_FASTPIPE 24084887Schin if(sffileno(sfstdin)<0) 24094887Schin { 24104887Schin off_t current = sfseek(sfstdin,(off_t)0,SEEK_CUR); 24114887Schin sfseek(sfstdin,(off_t)0,SEEK_END); 24124887Schin sfdisc(sfstdin,SF_POPDISC); 24134887Schin fcntl(sffileno(sfstdin),F_SETFD,0); 24144887Schin sh_iostream(0); 24154887Schin sfseek(sfstdin,current,SEEK_SET); 24164887Schin } 24174887Schin #endif /* SHOPT_FASTPIPE */ 24184887Schin if(!sh.pathlist) 24194887Schin path_get(""); 24204887Schin sfsync(NIL(Sfio_t*)); 24214887Schin sh.trapnote &= ~SH_SIGTERM; 24224887Schin job_fork(-1); 24234887Schin sh.savesig = -1; 24244887Schin while(_sh_fork(parent=fork(),flags,jobid) < 0); 24258462SApril.Chin@Sun.COM sh_stats(STAT_FORKS); 24264887Schin sig = sh.savesig; 24274887Schin sh.savesig = 0; 24284887Schin if(sig>0) 24294887Schin sh_fault(sig); 24304887Schin job_fork(parent); 24314887Schin return(parent); 24324887Schin } 24334887Schin 24344887Schin /* 24354887Schin * add exports from previous scope to the new scope 24364887Schin */ 24374887Schin static void local_exports(register Namval_t *np, void *data) 24384887Schin { 24394887Schin register Namval_t *mp; 24404887Schin register char *cp; 24414887Schin if(nv_isarray(np)) 24424887Schin nv_putsub(np,NIL(char*),0); 24434887Schin if((cp = nv_getval(np)) && (mp = nv_search(nv_name(np), sh.var_tree, NV_ADD|HASH_NOSCOPE)) && nv_isnull(mp)) 24444887Schin nv_putval(mp, cp, 0); 24454887Schin } 24464887Schin 24474887Schin /* 24484887Schin * This routine is used to execute the given function <fun> in a new scope 24494887Schin * If <fun> is NULL, then arg points to a structure containing a pointer 24504887Schin * to a function that will be executed in the current environment. 24514887Schin */ 24524887Schin int sh_funscope(int argn, char *argv[],int(*fun)(void*),void *arg,int execflg) 24534887Schin { 24548462SApril.Chin@Sun.COM register char *trap; 24558462SApril.Chin@Sun.COM register int nsig; 24568462SApril.Chin@Sun.COM register Shell_t *shp = &sh; 24578462SApril.Chin@Sun.COM struct dolnod *argsav=0,*saveargfor; 24588462SApril.Chin@Sun.COM struct sh_scoped savst, *prevscope = shp->st.self; 24598462SApril.Chin@Sun.COM struct argnod *envlist=0; 24608462SApril.Chin@Sun.COM int jmpval; 24618462SApril.Chin@Sun.COM volatile int r = 0; 24628462SApril.Chin@Sun.COM char *savstak; 24638462SApril.Chin@Sun.COM struct funenv *fp; 24648462SApril.Chin@Sun.COM struct checkpt buff; 24658462SApril.Chin@Sun.COM Namval_t *nspace = shp->namespace; 24668462SApril.Chin@Sun.COM if(shp->fn_depth==0) 24678462SApril.Chin@Sun.COM shp->glob_options = shp->options; 24688462SApril.Chin@Sun.COM else 24698462SApril.Chin@Sun.COM shp->options = shp->glob_options; 24708462SApril.Chin@Sun.COM #if 0 24718462SApril.Chin@Sun.COM shp->st.lineno = error_info.line; 24728462SApril.Chin@Sun.COM #endif 24738462SApril.Chin@Sun.COM *prevscope = shp->st; 24744887Schin sh_offoption(SH_ERREXIT); 24758462SApril.Chin@Sun.COM shp->st.prevst = prevscope; 24768462SApril.Chin@Sun.COM shp->st.self = &savst; 24778462SApril.Chin@Sun.COM shp->topscope = (Shscope_t*)shp->st.self; 24788462SApril.Chin@Sun.COM shp->st.opterror = shp->st.optchar = 0; 24798462SApril.Chin@Sun.COM shp->st.optindex = 1; 24808462SApril.Chin@Sun.COM shp->st.loopcnt = 0; 24814887Schin if(!fun) 24824887Schin { 24834887Schin fp = (struct funenv*)arg; 24848462SApril.Chin@Sun.COM shp->st.real_fun = (fp->node)->nvalue.rp; 24854887Schin envlist = fp->env; 24864887Schin } 24878462SApril.Chin@Sun.COM prevscope->save_tree = shp->var_tree; 24888462SApril.Chin@Sun.COM sh_scope(shp,envlist,1); 24898462SApril.Chin@Sun.COM if(dtvnext(prevscope->save_tree)!= (shp->namespace?shp->var_base:0)) 24904887Schin { 24914887Schin /* eliminate parent scope */ 24924887Schin nv_scan(prevscope->save_tree, local_exports,(void*)0, NV_EXPORT, NV_EXPORT|NV_NOSCOPE); 24934887Schin } 24948462SApril.Chin@Sun.COM shp->st.save_tree = shp->var_tree; 24954887Schin if(!fun) 24964887Schin { 24974887Schin Namval_t *np; 24984887Schin if(nv_isattr(fp->node,NV_TAGGED)) 24994887Schin sh_onoption(SH_XTRACE); 25004887Schin else 25014887Schin sh_offoption(SH_XTRACE); 25024887Schin #if SHOPT_NAMESPACE 25038462SApril.Chin@Sun.COM if((np=(fp->node)->nvalue.rp->nspace) && np!=shp->namespace) 25044887Schin { 25058462SApril.Chin@Sun.COM Dt_t *dt = shp->var_tree; 25064887Schin dtview(dt,0); 25074887Schin dtview(dt,nv_dict(np)); 25088462SApril.Chin@Sun.COM shp->var_tree = nv_dict(np); 25098462SApril.Chin@Sun.COM shp->namespace = np; 25104887Schin } 25114887Schin #endif /* SHOPT_NAMESPACE */ 25124887Schin } 25138462SApril.Chin@Sun.COM shp->st.cmdname = argv[0]; 25144887Schin /* save trap table */ 25158462SApril.Chin@Sun.COM if((nsig=shp->st.trapmax*sizeof(char*))>0 || shp->st.trapcom[0]) 25164887Schin { 25174887Schin nsig += sizeof(char*); 25188462SApril.Chin@Sun.COM memcpy(savstak=stakalloc(nsig),(char*)&shp->st.trapcom[0],nsig); 25194887Schin } 25204887Schin sh_sigreset(0); 25218462SApril.Chin@Sun.COM argsav = sh_argnew(shp,argv,&saveargfor); 25224887Schin sh_pushcontext(&buff,SH_JMPFUN); 25234887Schin errorpush(&buff.err,0); 25244887Schin error_info.id = argv[0]; 25258462SApril.Chin@Sun.COM shp->st.var_local = shp->var_tree; 25264887Schin jmpval = sigsetjmp(buff.buff,0); 25274887Schin if(!fun) 25284887Schin { 25298462SApril.Chin@Sun.COM shp->st.filename = fp->node->nvalue.rp->fname; 25308462SApril.Chin@Sun.COM shp->st.funname = nv_name(fp->node); 25318462SApril.Chin@Sun.COM nv_putval(SH_PATHNAMENOD,shp->st.filename,NV_NOFREE); 25328462SApril.Chin@Sun.COM nv_putval(SH_FUNNAMENOD,shp->st.funname,NV_NOFREE); 25334887Schin } 25344887Schin if(jmpval == 0) 25354887Schin { 25368462SApril.Chin@Sun.COM if(shp->fn_depth++ > MAXDEPTH) 25378462SApril.Chin@Sun.COM siglongjmp(*shp->jmplist,SH_JMPERRFN); 25384887Schin else if(fun) 25394887Schin r= (*fun)(arg); 25404887Schin else 25414887Schin { 25424887Schin sh_exec((Shnode_t*)(nv_funtree((fp->node))),execflg|SH_ERREXIT); 25438462SApril.Chin@Sun.COM r = shp->exitval; 25444887Schin } 25454887Schin } 25468462SApril.Chin@Sun.COM if(--shp->fn_depth==1 && jmpval==SH_JMPERRFN) 25474887Schin errormsg(SH_DICT,ERROR_exit(1),e_toodeep,argv[0]); 25484887Schin sh_popcontext(&buff); 25498462SApril.Chin@Sun.COM if (shp->st.self != &savst) 25508462SApril.Chin@Sun.COM shp->var_tree = (Dt_t*)savst.save_tree; 25518462SApril.Chin@Sun.COM sh_unscope(shp); 25528462SApril.Chin@Sun.COM shp->namespace = nspace; 25538462SApril.Chin@Sun.COM shp->var_tree = (Dt_t*)prevscope->save_tree; 25548462SApril.Chin@Sun.COM if(shp->topscope != (Shscope_t*)shp->st.self) 25558462SApril.Chin@Sun.COM sh_setscope(shp->topscope); 25568462SApril.Chin@Sun.COM sh_argreset(shp,argsav,saveargfor); 25578462SApril.Chin@Sun.COM trap = shp->st.trapcom[0]; 25588462SApril.Chin@Sun.COM shp->st.trapcom[0] = 0; 25594887Schin sh_sigreset(1); 25608462SApril.Chin@Sun.COM if (shp->st.self != &savst) 25618462SApril.Chin@Sun.COM *shp->st.self = shp->st; 25628462SApril.Chin@Sun.COM shp->st = *prevscope; 25638462SApril.Chin@Sun.COM shp->topscope = (Shscope_t*)prevscope; 25648462SApril.Chin@Sun.COM nv_getval(sh_scoped(shp,IFSNOD)); 25654887Schin if(nsig) 25668462SApril.Chin@Sun.COM memcpy((char*)&shp->st.trapcom[0],savstak,nsig); 25678462SApril.Chin@Sun.COM shp->trapnote=0; 25684887Schin if(nsig) 25694887Schin stakset(savstak,0); 25708462SApril.Chin@Sun.COM shp->options = shp->glob_options; 25714887Schin if(trap) 25724887Schin { 25734887Schin sh_trap(trap,0); 25744887Schin free(trap); 25754887Schin } 25768462SApril.Chin@Sun.COM if(shp->exitval > SH_EXITSIG) 25778462SApril.Chin@Sun.COM sh_fault(shp->exitval&SH_EXITMASK); 25784887Schin if(jmpval > SH_JMPFUN) 25794887Schin { 25804887Schin sh_chktrap(); 25818462SApril.Chin@Sun.COM siglongjmp(*shp->jmplist,jmpval); 25824887Schin } 25834887Schin return(r); 25844887Schin } 25854887Schin 25868462SApril.Chin@Sun.COM static void sh_funct(Shell_t *shp,Namval_t *np,int argn, char *argv[],struct argnod *envlist,int execflg) 25874887Schin { 25884887Schin struct funenv fun; 25894887Schin char *fname = nv_getval(SH_FUNNAMENOD); 25908462SApril.Chin@Sun.COM struct Level *lp =(struct Level*)(SH_LEVELNOD->nvfun); 25918462SApril.Chin@Sun.COM int level; 25928462SApril.Chin@Sun.COM sh_stats(STAT_FUNCT); 25938462SApril.Chin@Sun.COM if(!lp->hdr.disc) 25948462SApril.Chin@Sun.COM lp = init_level(0); 25958462SApril.Chin@Sun.COM if((struct sh_scoped*)shp->topscope != shp->st.self) 25968462SApril.Chin@Sun.COM sh_setscope(shp->topscope); 25978462SApril.Chin@Sun.COM level = lp->maxlevel = shp->dot_depth + shp->fn_depth+1; 25988462SApril.Chin@Sun.COM SH_LEVELNOD->nvalue.s = lp->maxlevel; 25998462SApril.Chin@Sun.COM shp->st.lineno = error_info.line; 26004887Schin if(nv_isattr(np,NV_FPOSIX)) 26014887Schin { 26024887Schin char *save; 26038462SApril.Chin@Sun.COM int loopcnt = shp->st.loopcnt; 26048462SApril.Chin@Sun.COM shp->posix_fun = np; 26058462SApril.Chin@Sun.COM save = argv[-1]; 26068462SApril.Chin@Sun.COM argv[-1] = 0; 26078462SApril.Chin@Sun.COM shp->st.funname = nv_name(np); 26088462SApril.Chin@Sun.COM nv_putval(SH_FUNNAMENOD, nv_name(np),NV_NOFREE); 26094887Schin opt_info.index = opt_info.offset = 0; 26104887Schin error_info.errors = 0; 26118462SApril.Chin@Sun.COM shp->st.loopcnt = 0; 26128462SApril.Chin@Sun.COM b_dot_cmd(argn+1,argv-1,&shp->bltindata); 26138462SApril.Chin@Sun.COM shp->st.loopcnt = loopcnt; 26144887Schin argv[-1] = save; 26154887Schin } 26164887Schin else 26174887Schin { 26184887Schin fun.env = envlist; 26194887Schin fun.node = np; 26204887Schin sh_funscope(argn,argv,0,&fun,execflg); 26214887Schin } 26228462SApril.Chin@Sun.COM if(level-- != nv_getnum(SH_LEVELNOD)) 26238462SApril.Chin@Sun.COM { 26248462SApril.Chin@Sun.COM Shscope_t *sp = sh_getscope(0,SEEK_END); 26258462SApril.Chin@Sun.COM sh_setscope(sp); 26268462SApril.Chin@Sun.COM } 26278462SApril.Chin@Sun.COM lp->maxlevel = level; 26288462SApril.Chin@Sun.COM SH_LEVELNOD->nvalue.s = lp->maxlevel; 26298462SApril.Chin@Sun.COM #if 0 26308462SApril.Chin@Sun.COM nv_putval(SH_FUNNAMENOD,shp->st.funname,NV_NOFREE); 26318462SApril.Chin@Sun.COM #else 26324887Schin nv_putval(SH_FUNNAMENOD,fname,NV_NOFREE); 26338462SApril.Chin@Sun.COM #endif 26348462SApril.Chin@Sun.COM nv_putval(SH_PATHNAMENOD,shp->st.filename,NV_NOFREE); 26354887Schin } 26364887Schin 26374887Schin /* 26384887Schin * external interface to execute a function without arguments 26394887Schin * <np> is the function node 26404887Schin * If <nq> is not-null, then sh.name and sh.subscript will be set 26414887Schin */ 26424887Schin int sh_fun(Namval_t *np, Namval_t *nq, char *argv[]) 26434887Schin { 26448462SApril.Chin@Sun.COM Shell_t *shp = &sh; 26454887Schin register int offset; 26464887Schin register char *base; 26474887Schin Namval_t node; 26488462SApril.Chin@Sun.COM struct Namref nr; 26498462SApril.Chin@Sun.COM long mode; 26508462SApril.Chin@Sun.COM char *prefix = shp->prefix; 26514887Schin int n=0; 26524887Schin char *av[2]; 26534887Schin Fcin_t save; 26544887Schin fcsave(&save); 26554887Schin if((offset=staktell())>0) 26564887Schin base=stakfreeze(0); 26578462SApril.Chin@Sun.COM shp->prefix = 0; 26584887Schin if(!argv) 26594887Schin { 26604887Schin argv = av; 26614887Schin argv[1]=0; 26624887Schin } 26634887Schin argv[0] = nv_name(np); 26644887Schin while(argv[n]) 26654887Schin n++; 26664887Schin if(nq) 26678462SApril.Chin@Sun.COM mode = set_instance(nq,&node, &nr); 26684887Schin if(is_abuiltin(np)) 26694887Schin { 26704887Schin int jmpval; 26714887Schin struct checkpt buff; 26728462SApril.Chin@Sun.COM Shbltin_t *bp = &sh.bltindata; 26734887Schin sh_pushcontext(&buff,SH_JMPCMD); 26744887Schin jmpval = sigsetjmp(buff.buff,1); 26754887Schin if(jmpval == 0) 26764887Schin { 26778462SApril.Chin@Sun.COM bp->bnode = np; 26788462SApril.Chin@Sun.COM bp->ptr = nv_context(np); 26794887Schin errorpush(&buff.err,0); 26804887Schin error_info.id = argv[0]; 26814887Schin opt_info.index = opt_info.offset = 0; 26824887Schin opt_info.disc = 0; 26834887Schin sh.exitval = 0; 26848462SApril.Chin@Sun.COM sh.exitval = (*funptr(np))(n,argv,(void*)bp); 26854887Schin } 26864887Schin sh_popcontext(&buff); 26874887Schin if(jmpval>SH_JMPCMD) 26884887Schin siglongjmp(*sh.jmplist,jmpval); 26894887Schin } 26904887Schin else 26918462SApril.Chin@Sun.COM sh_funct(shp,np,n,argv,(struct argnod*)0,sh_isstate(SH_ERREXIT)); 26924887Schin if(nq) 26938462SApril.Chin@Sun.COM unset_instance(nq, &node, &nr, mode); 26944887Schin fcrestore(&save); 26954887Schin if(offset>0) 26964887Schin stakset(base,offset); 26978462SApril.Chin@Sun.COM shp->prefix = prefix; 26984887Schin return(sh.exitval); 26994887Schin } 27004887Schin 27014887Schin /* 27024887Schin * This dummy routine is called by built-ins that do recursion 27034887Schin * on the file system (chmod, chgrp, chown). It causes 27044887Schin * the shell to invoke the non-builtin version in this case 27054887Schin */ 27064887Schin int cmdrecurse(int argc, char* argv[], int ac, char* av[]) 27074887Schin { 27084887Schin NOT_USED(argc); 27094887Schin NOT_USED(argv[0]); 27104887Schin NOT_USED(ac); 27114887Schin NOT_USED(av[0]); 27124887Schin return(SH_RUNPROG); 27134887Schin } 27144887Schin 27154887Schin /* 27164887Schin * set up pipe for cooperating process 27174887Schin */ 27188462SApril.Chin@Sun.COM static void coproc_init(Shell_t *shp, int pipes[]) 27194887Schin { 27204887Schin int outfd; 27218462SApril.Chin@Sun.COM if(shp->coutpipe>=0 && shp->cpid) 27224887Schin errormsg(SH_DICT,ERROR_exit(1),e_pexists); 27238462SApril.Chin@Sun.COM shp->cpid = 0; 27248462SApril.Chin@Sun.COM if(shp->cpipe[0]<=0 || shp->cpipe[1]<=0) 27254887Schin { 27264887Schin /* first co-process */ 27278462SApril.Chin@Sun.COM sh_pclose(shp->cpipe); 27288462SApril.Chin@Sun.COM sh_pipe(shp->cpipe); 27298462SApril.Chin@Sun.COM if((outfd=shp->cpipe[1]) < 10) 27304887Schin { 27318462SApril.Chin@Sun.COM int fd=fcntl(shp->cpipe[1],F_DUPFD,10); 27324887Schin if(fd>=10) 27334887Schin { 27348462SApril.Chin@Sun.COM shp->fdstatus[fd] = (shp->fdstatus[outfd]&~IOCLEX); 27354887Schin close(outfd); 27368462SApril.Chin@Sun.COM shp->fdstatus[outfd] = IOCLOSE; 27378462SApril.Chin@Sun.COM shp->cpipe[1] = fd; 27384887Schin } 27394887Schin } 27408462SApril.Chin@Sun.COM if(fcntl(*shp->cpipe,F_SETFD,FD_CLOEXEC)>=0) 27418462SApril.Chin@Sun.COM shp->fdstatus[shp->cpipe[0]] |= IOCLEX; 27428462SApril.Chin@Sun.COM shp->fdptrs[shp->cpipe[0]] = shp->cpipe; 27434887Schin 27448462SApril.Chin@Sun.COM if(fcntl(shp->cpipe[1],F_SETFD,FD_CLOEXEC) >=0) 27458462SApril.Chin@Sun.COM shp->fdstatus[shp->cpipe[1]] |= IOCLEX; 27464887Schin } 27478462SApril.Chin@Sun.COM shp->outpipe = shp->cpipe; 27488462SApril.Chin@Sun.COM sh_pipe(shp->inpipe=pipes); 27498462SApril.Chin@Sun.COM shp->coutpipe = shp->inpipe[1]; 27508462SApril.Chin@Sun.COM shp->fdptrs[shp->coutpipe] = &shp->coutpipe; 27518462SApril.Chin@Sun.COM if(fcntl(shp->outpipe[0],F_SETFD,FD_CLOEXEC)>=0) 27528462SApril.Chin@Sun.COM shp->fdstatus[shp->outpipe[0]] |= IOCLEX; 27534887Schin } 27544887Schin 27554887Schin #if SHOPT_SPAWN 27564887Schin 27574887Schin 27584887Schin #if SHOPT_AMP || !defined(_lib_fork) 27594887Schin /* 27604887Schin * print out function definition 27614887Schin */ 27624887Schin static void print_fun(register Namval_t* np, void *data) 27634887Schin { 27644887Schin register char *format; 27654887Schin NOT_USED(data); 27664887Schin if(!is_afunction(np) || !np->nvalue.ip) 27674887Schin return; 27684887Schin if(nv_isattr(np,NV_FPOSIX)) 27694887Schin format="%s()\n{ "; 27704887Schin else 27714887Schin format="function %s\n{ "; 27724887Schin sfprintf(sfstdout,format,nv_name(np)); 27734887Schin sh_deparse(sfstdout,(Shnode_t*)(nv_funtree(np)),0); 27744887Schin sfwrite(sfstdout,"}\n",2); 27754887Schin } 27764887Schin 27774887Schin /* 27784887Schin * create a shell script consisting of t->fork.forktre and execute it 27794887Schin */ 27804887Schin static int run_subshell(const Shnode_t *t,pid_t grp) 27814887Schin { 27828462SApril.Chin@Sun.COM static const char prolog[] = "(print $(typeset +A);set; typeset -p; print .sh.dollar=$$;set +o)"; 27834887Schin register int i, fd, trace = sh_isoption(SH_XTRACE); 27844887Schin int pin,pout; 27854887Schin pid_t pid; 27864887Schin char *arglist[2], *envlist[2], devfd[12], *cp; 27874887Schin Sfio_t *sp = sftmp(0); 27884887Schin envlist[0] = "_=" SH_ID; 27894887Schin envlist[1] = 0; 27904887Schin arglist[0] = error_info.id?error_info.id:sh.shname; 27914887Schin if(*arglist[0]=='-') 27924887Schin arglist[0]++; 27934887Schin arglist[1] = devfd; 27944887Schin strncpy(devfd,e_devfdNN,sizeof(devfd)); 27954887Schin arglist[2] = 0; 27964887Schin sfstack(sfstdout,sp); 27974887Schin if(trace) 27984887Schin sh_offoption(SH_XTRACE); 27994887Schin sfwrite(sfstdout,"typeset -A -- ",14); 28004887Schin sh_trap(prolog,0); 28014887Schin nv_scan(sh.fun_tree, print_fun, (void*)0,0, 0); 28024887Schin if(sh.st.dolc>0) 28034887Schin { 28044887Schin /* pass the positional parameters */ 28054887Schin char **argv = sh.st.dolv+1; 28064887Schin sfwrite(sfstdout,"set --",6); 28074887Schin while(*argv) 28084887Schin sfprintf(sfstdout," %s",sh_fmtq(*argv++)); 28094887Schin sfputc(sfstdout,'\n'); 28104887Schin } 28114887Schin pin = (sh.inpipe?sh.inpipe[1]:0); 28124887Schin pout = (sh.outpipe?sh.outpipe[0]:0); 28134887Schin for(i=3; i < 10; i++) 28144887Schin { 28154887Schin if(sh.fdstatus[i]&IOCLEX && i!=pin && i!=pout) 28164887Schin { 28174887Schin sfprintf(sfstdout,"exec %d<&%d\n",i,i); 28184887Schin fcntl(i,F_SETFD,0); 28194887Schin } 28204887Schin } 28214887Schin sfprintf(sfstdout,"LINENO=%d\n",t->fork.forkline); 28224887Schin if(trace) 28234887Schin { 28244887Schin sfwrite(sfstdout,"set -x\n",7); 28254887Schin sh_onoption(SH_XTRACE); 28264887Schin } 28274887Schin sfstack(sfstdout,NIL(Sfio_t*)); 28284887Schin sh_deparse(sp,t->fork.forktre,0); 28294887Schin sfseek(sp,(Sfoff_t)0,SEEK_SET); 28304887Schin fd = sh_dup(sffileno(sp)); 28314887Schin cp = devfd+8; 28324887Schin if(fd>9) 28334887Schin *cp++ = '0' + (fd/10); 28344887Schin *cp++ = '0' + fd%10; 28354887Schin *cp = 0; 28364887Schin sfclose(sp); 28374887Schin sfsync(NIL(Sfio_t*)); 28384887Schin if(!sh.shpath) 28394887Schin sh.shpath = pathshell(); 28404887Schin pid = spawnveg(sh.shpath,arglist,envlist,grp); 28414887Schin close(fd); 28424887Schin for(i=3; i < 10; i++) 28434887Schin { 28444887Schin if(sh.fdstatus[i]&IOCLEX && i!=pin && i!=pout) 28454887Schin fcntl(i,F_SETFD,FD_CLOEXEC); 28464887Schin } 28474887Schin if(pid <=0) 28484887Schin errormsg(SH_DICT,ERROR_system(ERROR_NOEXEC),e_exec,arglist[0]); 28494887Schin return(pid); 28504887Schin } 28514887Schin #endif /* !_lib_fork */ 28524887Schin 28534887Schin static void sigreset(int mode) 28544887Schin { 28554887Schin register char *trap; 28564887Schin register int sig=sh.st.trapmax; 28574887Schin while(sig-- > 0) 28584887Schin { 28594887Schin if((trap=sh.st.trapcom[sig]) && *trap==0) 28604887Schin signal(sig,mode?sh_fault:SIG_IGN); 28614887Schin } 28624887Schin } 28634887Schin 28644887Schin /* 28654887Schin * A combined fork/exec for systems with slow or non-existent fork() 28664887Schin */ 28678462SApril.Chin@Sun.COM static pid_t sh_ntfork(Shell_t *shp,const Shnode_t *t,char *argv[],int *jobid,int flag) 28684887Schin { 28694887Schin static pid_t spawnpid; 28704887Schin static int savetype; 28714887Schin static int savejobid; 28728462SApril.Chin@Sun.COM struct checkpt buff; 28738462SApril.Chin@Sun.COM int otype=0, jmpval; 28748462SApril.Chin@Sun.COM volatile int jobwasset=0, scope=0, sigwasset=0; 28758462SApril.Chin@Sun.COM char **arge, *path; 28768462SApril.Chin@Sun.COM volatile pid_t grp = 0; 28778462SApril.Chin@Sun.COM Pathcomp_t *pp; 28784887Schin if(flag) 28794887Schin { 28804887Schin otype = savetype; 28814887Schin savetype=0; 28824887Schin } 28834887Schin # if SHOPT_AMP || !defined(_lib_fork) 28844887Schin if(!argv) 28854887Schin { 28864887Schin register Shnode_t *tchild = t->fork.forktre; 28874887Schin int optimize=0; 28884887Schin otype = t->tre.tretyp; 28894887Schin savetype = otype; 28904887Schin spawnpid = 0; 28914887Schin # ifndef _lib_fork 28924887Schin if((tchild->tre.tretyp&COMMSK)==TCOM) 28934887Schin { 28944887Schin Namval_t *np = (Namval_t*)(tchild->com.comnamp); 28954887Schin if(np) 28964887Schin { 28974887Schin path = nv_name(np); 28984887Schin if(!nv_isattr(np,BLT_ENV)) 28994887Schin np=0; 29004887Schin else if(strcmp(path,"echo")==0 || memcmp(path,"print",5)==0) 29014887Schin np=0; 29024887Schin } 29034887Schin else if(!tchild->com.comarg) 29044887Schin optimize=1; 29054887Schin else if(tchild->com.comtyp&COMSCAN) 29064887Schin { 29074887Schin if(tchild->com.comarg->argflag&ARG_RAW) 29084887Schin path = tchild->com.comarg->argval; 29094887Schin else 29104887Schin path = 0; 29114887Schin } 29124887Schin else 29134887Schin path = ((struct dolnod*)tchild->com.comarg)->dolval[ARG_SPARE]; 29144887Schin if(!np && path && !nv_search(path,shp->fun_tree,0)) 29154887Schin optimize=1; 29164887Schin } 29174887Schin # endif 29184887Schin sh_pushcontext(&buff,SH_JMPIO); 29194887Schin jmpval = sigsetjmp(buff.buff,0); 29204887Schin { 29214887Schin if((otype&FINT) && !sh_isstate(SH_MONITOR)) 29224887Schin { 29234887Schin signal(SIGQUIT,SIG_IGN); 29244887Schin signal(SIGINT,SIG_IGN); 29254887Schin if(!shp->st.ioset) 29264887Schin { 29278462SApril.Chin@Sun.COM sh_iosave(shp,0,buff.topfd,(char*)0); 29288462SApril.Chin@Sun.COM sh_iorenumber(shp,sh_chkopen(e_devnull),0); 29294887Schin } 29304887Schin } 29314887Schin if(otype&FPIN) 29324887Schin { 29334887Schin int fd = shp->inpipe[1]; 29348462SApril.Chin@Sun.COM sh_iosave(shp,0,buff.topfd,(char*)0); 29358462SApril.Chin@Sun.COM sh_iorenumber(shp,shp->inpipe[0],0); 29364887Schin if(fd>=0 && (!(otype&FPOU) || (otype&FCOOP)) && fcntl(fd,F_SETFD,FD_CLOEXEC)>=0) 29374887Schin shp->fdstatus[fd] |= IOCLEX; 29384887Schin } 29394887Schin if(otype&FPOU) 29404887Schin { 29418462SApril.Chin@Sun.COM sh_iosave(shp,1,buff.topfd,(char*)0); 29428462SApril.Chin@Sun.COM sh_iorenumber(shp,sh_dup(shp->outpipe[1]),1); 29434887Schin if(fcntl(shp->outpipe[0],F_SETFD,FD_CLOEXEC)>=0) 29444887Schin shp->fdstatus[shp->outpipe[0]] |= IOCLEX; 29454887Schin } 29464887Schin 29474887Schin if(t->fork.forkio) 29488462SApril.Chin@Sun.COM sh_redirect(shp,t->fork.forkio,0); 29494887Schin if(optimize==0) 29504887Schin { 29514887Schin #ifdef SIGTSTP 29524887Schin if(job.jobcontrol) 29534887Schin { 29544887Schin signal(SIGTTIN,SIG_DFL); 29554887Schin signal(SIGTTOU,SIG_DFL); 29564887Schin } 29574887Schin #endif /* SIGTSTP */ 29584887Schin #ifdef JOBS 29594887Schin if(sh_isstate(SH_MONITOR) && (job.jobcontrol || (otype&FAMP))) 29604887Schin { 29614887Schin if((otype&FAMP) || job.curpgid==0) 29624887Schin grp = 1; 29634887Schin else 29644887Schin grp = job.curpgid; 29654887Schin } 29664887Schin #endif /* JOBS */ 29674887Schin spawnpid = run_subshell(t,grp); 29684887Schin } 29694887Schin else 29704887Schin { 29714887Schin sh_exec(tchild,SH_NTFORK); 29724887Schin if(jobid) 29734887Schin *jobid = savejobid; 29744887Schin } 29754887Schin } 29764887Schin sh_popcontext(&buff); 29774887Schin if((otype&FINT) && !sh_isstate(SH_MONITOR)) 29784887Schin { 29794887Schin signal(SIGQUIT,sh_fault); 29804887Schin signal(SIGINT,sh_fault); 29814887Schin } 29824887Schin if((otype&FPIN) && (!(otype&FPOU) || (otype&FCOOP)) && fcntl(shp->inpipe[1],F_SETFD,FD_CLOEXEC)>=0) 29834887Schin shp->fdstatus[shp->inpipe[1]] &= ~IOCLEX; 29844887Schin if(t->fork.forkio || otype) 29858462SApril.Chin@Sun.COM sh_iorestore(shp,buff.topfd,jmpval); 29864887Schin if(optimize==0) 29874887Schin { 29884887Schin #ifdef SIGTSTP 29894887Schin if(job.jobcontrol) 29904887Schin { 29914887Schin signal(SIGTTIN,SIG_IGN); 29924887Schin signal(SIGTTOU,SIG_IGN); 29934887Schin } 29944887Schin #endif /* SIGTSTP */ 29954887Schin if(spawnpid>0) 29964887Schin _sh_fork(spawnpid,otype,jobid); 29974887Schin if(grp>0 && !(otype&FAMP)) 29984887Schin { 29994887Schin while(tcsetpgrp(job.fd,job.curpgid)<0 && job.curpgid!=spawnpid) 30004887Schin job.curpgid = spawnpid; 30014887Schin } 30024887Schin } 30034887Schin savetype=0; 30044887Schin if(jmpval>SH_JMPIO) 30054887Schin siglongjmp(*shp->jmplist,jmpval); 30064887Schin if(spawnpid<0 && (otype&FCOOP)) 30074887Schin { 30084887Schin sh_close(shp->coutpipe); 30094887Schin sh_close(shp->cpipe[1]); 30104887Schin shp->cpipe[1] = -1; 30114887Schin shp->coutpipe = -1; 30124887Schin } 30134887Schin shp->exitval = 0; 30144887Schin return(spawnpid); 30154887Schin } 30164887Schin # endif /* !_lib_fork */ 30174887Schin sh_pushcontext(&buff,SH_JMPCMD); 30184887Schin errorpush(&buff.err,ERROR_SILENT); 30194887Schin jmpval = sigsetjmp(buff.buff,0); 30204887Schin if(jmpval == 0) 30214887Schin { 30224887Schin if((otype&FINT) && !sh_isstate(SH_MONITOR)) 30234887Schin { 30244887Schin signal(SIGQUIT,SIG_IGN); 30254887Schin signal(SIGINT,SIG_IGN); 30264887Schin } 30274887Schin spawnpid = -1; 30284887Schin if(t->com.comio) 30298462SApril.Chin@Sun.COM sh_redirect(shp,t->com.comio,0); 30304887Schin error_info.id = *argv; 30314887Schin if(t->com.comset) 30324887Schin { 30334887Schin scope++; 30348462SApril.Chin@Sun.COM sh_scope(shp,t->com.comset,0); 30354887Schin } 30364887Schin if(!strchr(path=argv[0],'/')) 30374887Schin { 30384887Schin Namval_t *np; 30394887Schin if((np=nv_search(path,shp->track_tree,0)) && !nv_isattr(np,NV_NOALIAS) && np->nvalue.cp) 30404887Schin path = nv_getval(np); 30414887Schin else if(path_absolute(path,NIL(Pathcomp_t*))) 30424887Schin { 30438462SApril.Chin@Sun.COM path = stkptr(shp->stk,PATH_OFFSET); 30448462SApril.Chin@Sun.COM stkfreeze(shp->stk,0); 30458462SApril.Chin@Sun.COM } 30468462SApril.Chin@Sun.COM else 30478462SApril.Chin@Sun.COM { 30488462SApril.Chin@Sun.COM pp=path_get(path); 30498462SApril.Chin@Sun.COM while(pp) 30504887Schin { 30518462SApril.Chin@Sun.COM if(pp->len==1 && *pp->name=='.') 30528462SApril.Chin@Sun.COM break; 30538462SApril.Chin@Sun.COM pp = pp->next; 30544887Schin } 30558462SApril.Chin@Sun.COM if(!pp) 30568462SApril.Chin@Sun.COM path = 0; 30574887Schin } 30588462SApril.Chin@Sun.COM } 30598462SApril.Chin@Sun.COM else if(sh_isoption(SH_RESTRICTED)) 30608462SApril.Chin@Sun.COM errormsg(SH_DICT,ERROR_exit(1),e_restricted,path); 30618462SApril.Chin@Sun.COM if(!path) 30628462SApril.Chin@Sun.COM { 30638462SApril.Chin@Sun.COM spawnpid = -1; 30648462SApril.Chin@Sun.COM goto fail; 30658462SApril.Chin@Sun.COM } 30668462SApril.Chin@Sun.COM arge = sh_envgen(); 30678462SApril.Chin@Sun.COM shp->exitval = 0; 30684887Schin #ifdef SIGTSTP 30694887Schin if(job.jobcontrol) 30704887Schin { 30714887Schin signal(SIGTTIN,SIG_DFL); 30724887Schin signal(SIGTTOU,SIG_DFL); 30734887Schin jobwasset++; 30744887Schin } 30754887Schin #endif /* SIGTSTP */ 30764887Schin #ifdef JOBS 30774887Schin if(sh_isstate(SH_MONITOR) && (job.jobcontrol || (otype&FAMP))) 30784887Schin { 30794887Schin if((otype&FAMP) || job.curpgid==0) 30804887Schin grp = 1; 30814887Schin else 30824887Schin grp = job.curpgid; 30834887Schin } 30844887Schin #endif /* JOBS */ 30854887Schin 30864887Schin sfsync(NIL(Sfio_t*)); 30874887Schin sigreset(0); /* set signals to ignore */ 30884887Schin sigwasset++; 30894887Schin /* find first path that has a library component */ 30904887Schin for(pp=path_get(argv[0]); pp && !pp->lib ; pp=pp->next); 30914887Schin spawnpid = path_spawn(path,argv,arge,pp,(grp<<1)|1); 30924887Schin if(spawnpid < 0 && errno==ENOEXEC) 30934887Schin { 30944887Schin char *devfd; 30954887Schin int fd = open(path,O_RDONLY); 30964887Schin argv[-1] = argv[0]; 30974887Schin argv[0] = path; 30984887Schin if(fd>=0) 30994887Schin { 31004887Schin struct stat statb; 31014887Schin sfprintf(sh.strbuf,"/dev/fd/%d",fd); 31024887Schin if(stat(devfd=sfstruse(sh.strbuf),&statb)>=0) 31034887Schin argv[0] = devfd; 31044887Schin } 31054887Schin if(!shp->shpath) 31064887Schin shp->shpath = pathshell(); 31074887Schin spawnpid = path_spawn(shp->shpath,&argv[-1],arge,pp,(grp<<1)|1); 31084887Schin if(fd>=0) 31094887Schin close(fd); 31104887Schin argv[0] = argv[-1]; 31114887Schin } 31124887Schin fail: 31134887Schin if(spawnpid < 0) switch(errno=shp->path_err) 31144887Schin { 31154887Schin case ENOENT: 31164887Schin errormsg(SH_DICT,ERROR_system(ERROR_NOENT),e_found+4); 31174887Schin default: 31184887Schin errormsg(SH_DICT,ERROR_system(ERROR_NOEXEC),e_exec+4); 31194887Schin } 31204887Schin } 31214887Schin else 31224887Schin exitset(); 31234887Schin sh_popcontext(&buff); 31244887Schin if(buff.olist) 31254887Schin free_list(buff.olist); 31264887Schin #ifdef SIGTSTP 31274887Schin if(jobwasset) 31284887Schin { 31294887Schin signal(SIGTTIN,SIG_IGN); 31304887Schin signal(SIGTTOU,SIG_IGN); 31314887Schin } 31324887Schin #endif /* SIGTSTP */ 31334887Schin if(sigwasset) 31344887Schin sigreset(1); /* restore ignored signals */ 31354887Schin if(scope) 31364887Schin { 31378462SApril.Chin@Sun.COM sh_unscope(shp); 31384887Schin if(jmpval==SH_JMPSCRIPT) 31394887Schin nv_setlist(t->com.comset,NV_EXPORT|NV_IDENT|NV_ASSIGN); 31404887Schin } 31414887Schin if(t->com.comio) 31428462SApril.Chin@Sun.COM sh_iorestore(shp,buff.topfd,jmpval); 31434887Schin if(jmpval>SH_JMPCMD) 31444887Schin siglongjmp(*shp->jmplist,jmpval); 31454887Schin if(spawnpid>0) 31464887Schin { 31474887Schin _sh_fork(spawnpid,otype,jobid); 31484887Schin #ifdef JOBS 31494887Schin if(grp==1) 31504887Schin job.curpgid = spawnpid; 31514887Schin # ifdef SIGTSTP 31524887Schin if(grp>0 && !(otype&FAMP)) 31534887Schin { 31544887Schin while(tcsetpgrp(job.fd,job.curpgid)<0 && job.curpgid!=spawnpid) 31554887Schin job.curpgid = spawnpid; 31564887Schin } 31574887Schin # endif /* SIGTSTP */ 31584887Schin #endif /* JOBS */ 31594887Schin savejobid = *jobid; 31604887Schin if(otype) 31614887Schin return(0); 31624887Schin } 31634887Schin return(spawnpid); 31644887Schin } 31654887Schin 31664887Schin # ifdef _was_lib_fork 31674887Schin # define _lib_fork 1 31684887Schin # endif 31694887Schin # ifndef _lib_fork 31704887Schin pid_t fork(void) 31714887Schin { 31724887Schin errormsg(SH_DICT,ERROR_exit(3),e_notimp,"fork"); 31734887Schin return(-1); 31744887Schin } 31754887Schin # endif /* _lib_fork */ 31764887Schin #endif /* SHOPT_SPAWN */ 3177