1 /* common.c 4.3 83/05/18 */ 2 /* 3 * Routines and data common to all the line printer functions. 4 */ 5 6 #include "lp.h" 7 8 int DU; /* daeomon user-id */ 9 int MX; /* maximum number of blocks to copy */ 10 char *LP; /* line printer device name */ 11 char *RM; /* remote machine name */ 12 char *RP; /* remote printer name */ 13 char *LO; /* lock file name */ 14 char *ST; /* status file name */ 15 char *SD; /* spool directory */ 16 char *AF; /* accounting file */ 17 char *LF; /* log file for error messages */ 18 char *OF; /* name of output filter (created once) */ 19 char *IF; /* name of input filter (created per job) */ 20 char *RF; /* name of fortran text filter (per job) */ 21 char *TF; /* name of troff filter (per job) */ 22 char *DF; /* name of tex filter (per job) */ 23 char *GF; /* name of graph(1G) filter (per job) */ 24 char *VF; /* name of vplot filter (per job) */ 25 char *CF; /* name of cifplot filter (per job) */ 26 char *PF; /* name of vrast filter (per job) */ 27 char *FF; /* form feed string */ 28 char *TR; /* trailer string to be output when Q empties */ 29 short SF; /* suppress FF on each print job */ 30 short SH; /* suppress header page */ 31 short SB; /* short banner instead of normal header */ 32 short RW; /* open LP for reading and writing */ 33 short PW; /* page width */ 34 short PL; /* page length */ 35 short PX; /* page width in pixels */ 36 short PY; /* page length in pixels */ 37 short BR; /* baud rate if lp is a tty */ 38 short FC; /* flags to clear if lp is a tty */ 39 short FS; /* flags to set if lp is a tty */ 40 short XC; /* flags to clear for local mode */ 41 short XS; /* flags to set for local mode */ 42 short RS; /* restricted to those with local accounts */ 43 44 char line[BUFSIZ]; 45 char pbuf[BUFSIZ/2]; /* buffer for printcap strings */ 46 char *bp = pbuf; /* pointer into pbuf for pgetent() */ 47 char *name; /* program name */ 48 char *printer; /* printer name */ 49 char host[32]; /* host machine name */ 50 char *from = host; /* client's machine name */ 51 52 /* 53 * Create a connection to the remote printer server. 54 * Most of this code comes from rcmd.c. 55 */ 56 getport(rhost) 57 char *rhost; 58 { 59 struct hostent *hp; 60 struct servent *sp; 61 struct sockaddr_in sin; 62 int s, timo = 1, lport = IPPORT_RESERVED - 1; 63 64 /* 65 * Get the host address and port number to connect to. 66 */ 67 if (rhost == NULL) 68 fatal("no remote host to connect to"); 69 hp = gethostbyname(rhost); 70 if (hp == NULL) 71 fatal("unknown host %s", rhost); 72 sp = getservbyname("printer", "tcp"); 73 if (sp == NULL) 74 fatal("printer/tcp: unknown service"); 75 bzero((char *)&sin, sizeof(sin)); 76 bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length); 77 sin.sin_family = hp->h_addrtype; 78 sin.sin_port = sp->s_port; 79 80 /* 81 * Try connecting to the server. 82 */ 83 retry: 84 s = rresvport(&lport); 85 if (s < 0) 86 return(-1); 87 if (connect(s, (caddr_t)&sin, sizeof(sin), 0) < 0) { 88 if (errno == EADDRINUSE) { 89 close(s); 90 lport--; 91 goto retry; 92 } 93 if (errno == ECONNREFUSED && timo <= 16) { 94 (void) close(s); 95 sleep(timo); 96 timo *= 2; 97 goto retry; 98 } 99 return(-1); 100 } 101 return(s); 102 } 103 104 rresvport(alport) 105 int *alport; 106 { 107 struct sockaddr_in sin; 108 int s; 109 110 sin.sin_family = AF_INET; 111 sin.sin_addr.s_addr = 0; 112 s = socket(AF_INET, SOCK_STREAM, 0); 113 if (s < 0) 114 return(-1); 115 for (;;) { 116 sin.sin_port = htons((u_short) *alport); 117 if (bind(s, (caddr_t)&sin, sizeof(sin), 0) >= 0) 118 return(s); 119 if (errno != EADDRINUSE && errno != EADDRNOTAVAIL) 120 return(-1); 121 (*alport)--; 122 if (*alport == IPPORT_RESERVED/2) 123 return(-1); 124 } 125 } 126 127 /* 128 * Getline reads a line from the control file cfp, removes tabs, converts 129 * new-line to null and leaves it in line. 130 * Returns 0 at EOF or the number of characters read. 131 */ 132 getline(cfp) 133 FILE *cfp; 134 { 135 register int linel = 0; 136 register char *lp = line; 137 register c; 138 139 while ((c = getc(cfp)) != '\n') { 140 if (c == EOF) 141 return(0); 142 if (c == '\t') { 143 do { 144 *lp++ = ' '; 145 linel++; 146 } while ((linel & 07) != 0); 147 continue; 148 } 149 *lp++ = c; 150 linel++; 151 } 152 *lp++ = '\0'; 153 return(linel); 154 } 155 156 /* 157 * Scan the current directory and make a list of daemon files sorted by 158 * creation time. 159 * Return the number of entries and a pointer to the list. 160 */ 161 getq(namelist) 162 struct queue *(*namelist[]); 163 { 164 register struct direct *d; 165 register struct queue *q, **queue; 166 register int nitems; 167 struct stat stbuf; 168 int arraysz, compar(); 169 DIR *dirp; 170 171 if ((dirp = opendir(".")) == NULL) 172 return(-1); 173 if (fstat(dirp->dd_fd, &stbuf) < 0) 174 return(-1); 175 176 /* 177 * Estimate the array size by taking the size of the directory file 178 * and dividing it by a multiple of the minimum size entry. 179 */ 180 arraysz = (stbuf.st_size / 24); 181 queue = (struct queue **)malloc(arraysz * sizeof(struct queue *)); 182 if (queue == NULL) 183 return(-1); 184 185 nitems = 0; 186 while ((d = readdir(dirp)) != NULL) { 187 if (d->d_name[0] != 'c' || d->d_name[1] != 'f') 188 continue; /* daemon control files only */ 189 if (stat(d->d_name, &stbuf) < 0) 190 continue; /* Doesn't exist */ 191 q = (struct queue *)malloc(sizeof(time_t)+strlen(d->d_name)+1); 192 if (q == NULL) 193 return(-1); 194 q->q_time = stbuf.st_mtime; 195 strcpy(q->q_name, d->d_name); 196 /* 197 * Check to make sure the array has space left and 198 * realloc the maximum size. 199 */ 200 if (++nitems > arraysz) { 201 queue = (struct queue **)realloc((char *)queue, 202 (stbuf.st_size/12) * sizeof(struct queue *)); 203 if (queue == NULL) 204 return(-1); 205 } 206 queue[nitems-1] = q; 207 } 208 closedir(dirp); 209 if (nitems) 210 qsort(queue, nitems, sizeof(struct queue *), compar); 211 *namelist = queue; 212 return(nitems); 213 } 214 215 /* 216 * Compare modification times. 217 */ 218 static 219 compar(p1, p2) 220 register struct queue **p1, **p2; 221 { 222 if ((*p1)->q_time < (*p2)->q_time) 223 return(-1); 224 if ((*p1)->q_time > (*p2)->q_time) 225 return(1); 226 return(0); 227 } 228 229 /*VARARGS1*/ 230 fatal(msg, a1, a2, a3) 231 char *msg; 232 { 233 if (from != host) 234 printf("%s: ", host); 235 printf("%s: ", name); 236 if (printer) 237 printf("%s: ", printer); 238 printf(msg, a1, a2, a3); 239 putchar('\n'); 240 exit(1); 241 } 242 243 fatalerror(msg) 244 char *msg; 245 { 246 extern int sys_nerr; 247 extern char *sys_errlist[]; 248 249 printf("%s: ", name); 250 if (*msg) 251 printf("%s: ", msg); 252 fputs(errno < sys_nerr ? sys_errlist[errno] : "Unknown error" , stdout); 253 putchar('\n'); 254 exit(1); 255 } 256