1 /* common.c 4.5 83/06/02 */ 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 int err; 64 65 /* 66 * Get the host address and port number to connect to. 67 */ 68 if (rhost == NULL) 69 fatal("no remote host to connect to"); 70 hp = gethostbyname(rhost); 71 if (hp == NULL) 72 fatal("unknown host %s", rhost); 73 sp = getservbyname("printer", "tcp"); 74 if (sp == NULL) 75 fatal("printer/tcp: unknown service"); 76 bzero((char *)&sin, sizeof(sin)); 77 bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length); 78 sin.sin_family = hp->h_addrtype; 79 sin.sin_port = sp->s_port; 80 81 /* 82 * Try connecting to the server. 83 */ 84 retry: 85 s = rresvport(&lport); 86 if (s < 0) 87 return(-1); 88 if (connect(s, (caddr_t)&sin, sizeof(sin), 0) < 0) { 89 err = errno; 90 (void) close(s); 91 errno = err; 92 if (errno == EADDRINUSE) { 93 lport--; 94 goto retry; 95 } 96 if (errno == ECONNREFUSED && timo <= 16) { 97 sleep(timo); 98 timo *= 2; 99 goto retry; 100 } 101 return(-1); 102 } 103 return(s); 104 } 105 106 rresvport(alport) 107 int *alport; 108 { 109 struct sockaddr_in sin; 110 int s; 111 112 sin.sin_family = AF_INET; 113 sin.sin_addr.s_addr = 0; 114 s = socket(AF_INET, SOCK_STREAM, 0); 115 if (s < 0) 116 return(-1); 117 for (; *alport > IPPORT_RESERVED/2; (*alport)--) { 118 sin.sin_port = htons((u_short) *alport); 119 if (bind(s, (caddr_t)&sin, sizeof(sin), 0) >= 0) 120 return(s); 121 if (errno != EADDRINUSE && errno != EADDRNOTAVAIL) 122 break; 123 } 124 (void) close(s); 125 return(-1); 126 } 127 128 /* 129 * Getline reads a line from the control file cfp, removes tabs, converts 130 * new-line to null and leaves it in line. 131 * Returns 0 at EOF or the number of characters read. 132 */ 133 getline(cfp) 134 FILE *cfp; 135 { 136 register int linel = 0; 137 register char *lp = line; 138 register c; 139 140 while ((c = getc(cfp)) != '\n') { 141 if (c == EOF) 142 return(0); 143 if (c == '\t') { 144 do { 145 *lp++ = ' '; 146 linel++; 147 } while ((linel & 07) != 0); 148 continue; 149 } 150 *lp++ = c; 151 linel++; 152 } 153 *lp++ = '\0'; 154 return(linel); 155 } 156 157 /* 158 * Scan the current directory and make a list of daemon files sorted by 159 * creation time. 160 * Return the number of entries and a pointer to the list. 161 */ 162 getq(namelist) 163 struct queue *(*namelist[]); 164 { 165 register struct direct *d; 166 register struct queue *q, **queue; 167 register int nitems; 168 struct stat stbuf; 169 int arraysz, compar(); 170 DIR *dirp; 171 172 if ((dirp = opendir(".")) == NULL) 173 return(-1); 174 if (fstat(dirp->dd_fd, &stbuf) < 0) 175 goto errdone; 176 177 /* 178 * Estimate the array size by taking the size of the directory file 179 * and dividing it by a multiple of the minimum size entry. 180 */ 181 arraysz = (stbuf.st_size / 24); 182 queue = (struct queue **)malloc(arraysz * sizeof(struct queue *)); 183 if (queue == NULL) 184 goto errdone; 185 186 nitems = 0; 187 while ((d = readdir(dirp)) != NULL) { 188 if (d->d_name[0] != 'c' || d->d_name[1] != 'f') 189 continue; /* daemon control files only */ 190 if (stat(d->d_name, &stbuf) < 0) 191 continue; /* Doesn't exist */ 192 q = (struct queue *)malloc(sizeof(time_t)+strlen(d->d_name)+1); 193 if (q == NULL) 194 goto errdone; 195 q->q_time = stbuf.st_mtime; 196 strcpy(q->q_name, d->d_name); 197 /* 198 * Check to make sure the array has space left and 199 * realloc the maximum size. 200 */ 201 if (++nitems > arraysz) { 202 queue = (struct queue **)realloc((char *)queue, 203 (stbuf.st_size/12) * sizeof(struct queue *)); 204 if (queue == NULL) 205 goto errdone; 206 } 207 queue[nitems-1] = q; 208 } 209 closedir(dirp); 210 if (nitems) 211 qsort(queue, nitems, sizeof(struct queue *), compar); 212 *namelist = queue; 213 return(nitems); 214 215 errdone: 216 closedir(dirp); 217 return(-1); 218 } 219 220 /* 221 * Compare modification times. 222 */ 223 static 224 compar(p1, p2) 225 register struct queue **p1, **p2; 226 { 227 if ((*p1)->q_time < (*p2)->q_time) 228 return(-1); 229 if ((*p1)->q_time > (*p2)->q_time) 230 return(1); 231 return(0); 232 } 233 234 /*VARARGS1*/ 235 fatal(msg, a1, a2, a3) 236 char *msg; 237 { 238 if (from != host) 239 printf("%s: ", host); 240 printf("%s: ", name); 241 if (printer) 242 printf("%s: ", printer); 243 printf(msg, a1, a2, a3); 244 putchar('\n'); 245 exit(1); 246 } 247