1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)common.c 5.6 (Berkeley) 06/01/90"; 10 #endif /* not lint */ 11 12 /* 13 * Routines and data common to all the line printer functions. 14 */ 15 16 #include "lp.h" 17 18 int DU; /* daeomon user-id */ 19 int MX; /* maximum number of blocks to copy */ 20 int MC; /* maximum number of copies allowed */ 21 char *LP; /* line printer device name */ 22 char *RM; /* remote machine name */ 23 char *RP; /* remote printer name */ 24 char *LO; /* lock file name */ 25 char *ST; /* status file name */ 26 char *SD; /* spool directory */ 27 char *AF; /* accounting file */ 28 char *LF; /* log file for error messages */ 29 char *OF; /* name of output filter (created once) */ 30 char *IF; /* name of input filter (created per job) */ 31 char *RF; /* name of fortran text filter (per job) */ 32 char *TF; /* name of troff filter (per job) */ 33 char *NF; /* name of ditroff filter (per job) */ 34 char *DF; /* name of tex filter (per job) */ 35 char *GF; /* name of graph(1G) filter (per job) */ 36 char *VF; /* name of vplot filter (per job) */ 37 char *CF; /* name of cifplot filter (per job) */ 38 char *PF; /* name of vrast filter (per job) */ 39 char *FF; /* form feed string */ 40 char *TR; /* trailer string to be output when Q empties */ 41 short SC; /* suppress multiple copies */ 42 short SF; /* suppress FF on each print job */ 43 short SH; /* suppress header page */ 44 short SB; /* short banner instead of normal header */ 45 short HL; /* print header last */ 46 short RW; /* open LP for reading and writing */ 47 short PW; /* page width */ 48 short PL; /* page length */ 49 short PX; /* page width in pixels */ 50 short PY; /* page length in pixels */ 51 short BR; /* baud rate if lp is a tty */ 52 int FC; /* flags to clear if lp is a tty */ 53 int FS; /* flags to set if lp is a tty */ 54 int XC; /* flags to clear for local mode */ 55 int XS; /* flags to set for local mode */ 56 short RS; /* restricted to those with local accounts */ 57 58 char line[BUFSIZ]; 59 char pbuf[BUFSIZ/2]; /* buffer for printcap strings */ 60 char *bp = pbuf; /* pointer into pbuf for pgetent() */ 61 char *name; /* program name */ 62 char *printer; /* printer name */ 63 char host[32]; /* host machine name */ 64 char *from = host; /* client's machine name */ 65 int sendtorem; /* are we sending to a remote? */ 66 67 /* 68 * Create a connection to the remote printer server. 69 * Most of this code comes from rcmd.c. 70 */ 71 getport(rhost) 72 char *rhost; 73 { 74 struct hostent *hp; 75 struct servent *sp; 76 struct sockaddr_in sin; 77 int s, timo = 1, lport = IPPORT_RESERVED - 1; 78 int err; 79 80 /* 81 * Get the host address and port number to connect to. 82 */ 83 if (rhost == NULL) 84 fatal("no remote host to connect to"); 85 hp = gethostbyname(rhost); 86 if (hp == NULL) 87 fatal("unknown host %s", rhost); 88 sp = getservbyname("printer", "tcp"); 89 if (sp == NULL) 90 fatal("printer/tcp: unknown service"); 91 bzero((char *)&sin, sizeof(sin)); 92 bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length); 93 sin.sin_family = hp->h_addrtype; 94 sin.sin_port = sp->s_port; 95 96 /* 97 * Try connecting to the server. 98 */ 99 retry: 100 s = rresvport(&lport); 101 if (s < 0) 102 return(-1); 103 if (connect(s, (caddr_t)&sin, sizeof(sin)) < 0) { 104 err = errno; 105 (void) close(s); 106 errno = err; 107 if (errno == EADDRINUSE) { 108 lport--; 109 goto retry; 110 } 111 if (errno == ECONNREFUSED && timo <= 16) { 112 sleep(timo); 113 timo *= 2; 114 goto retry; 115 } 116 return(-1); 117 } 118 return(s); 119 } 120 121 /* 122 * Getline reads a line from the control file cfp, removes tabs, converts 123 * new-line to null and leaves it in line. 124 * Returns 0 at EOF or the number of characters read. 125 */ 126 getline(cfp) 127 FILE *cfp; 128 { 129 register int linel = 0; 130 register char *lp = line; 131 register c; 132 133 while ((c = getc(cfp)) != '\n') { 134 if (c == EOF) 135 return(0); 136 if (c == '\t') { 137 do { 138 *lp++ = ' '; 139 linel++; 140 } while ((linel & 07) != 0); 141 continue; 142 } 143 *lp++ = c; 144 linel++; 145 } 146 *lp++ = '\0'; 147 return(linel); 148 } 149 150 /* 151 * Scan the current directory and make a list of daemon files sorted by 152 * creation time. 153 * Return the number of entries and a pointer to the list. 154 */ 155 getq(namelist) 156 struct queue *(*namelist[]); 157 { 158 register struct direct *d; 159 register struct queue *q, **queue; 160 register int nitems; 161 struct stat stbuf; 162 int arraysz, compar(); 163 DIR *dirp; 164 165 if ((dirp = opendir(SD)) == NULL) 166 return(-1); 167 if (fstat(dirp->dd_fd, &stbuf) < 0) 168 goto errdone; 169 170 /* 171 * Estimate the array size by taking the size of the directory file 172 * and dividing it by a multiple of the minimum size entry. 173 */ 174 arraysz = (stbuf.st_size / 24); 175 queue = (struct queue **)malloc(arraysz * sizeof(struct queue *)); 176 if (queue == NULL) 177 goto errdone; 178 179 nitems = 0; 180 while ((d = readdir(dirp)) != NULL) { 181 if (d->d_name[0] != 'c' || d->d_name[1] != 'f') 182 continue; /* daemon control files only */ 183 if (stat(d->d_name, &stbuf) < 0) 184 continue; /* Doesn't exist */ 185 q = (struct queue *)malloc(sizeof(time_t)+strlen(d->d_name)+1); 186 if (q == NULL) 187 goto errdone; 188 q->q_time = stbuf.st_mtime; 189 strcpy(q->q_name, d->d_name); 190 /* 191 * Check to make sure the array has space left and 192 * realloc the maximum size. 193 */ 194 if (++nitems > arraysz) { 195 queue = (struct queue **)realloc((char *)queue, 196 (stbuf.st_size/12) * sizeof(struct queue *)); 197 if (queue == NULL) 198 goto errdone; 199 } 200 queue[nitems-1] = q; 201 } 202 closedir(dirp); 203 if (nitems) 204 qsort(queue, nitems, sizeof(struct queue *), compar); 205 *namelist = queue; 206 return(nitems); 207 208 errdone: 209 closedir(dirp); 210 return(-1); 211 } 212 213 /* 214 * Compare modification times. 215 */ 216 static 217 compar(p1, p2) 218 register struct queue **p1, **p2; 219 { 220 if ((*p1)->q_time < (*p2)->q_time) 221 return(-1); 222 if ((*p1)->q_time > (*p2)->q_time) 223 return(1); 224 return(0); 225 } 226 227 /* 228 * Figure out whether the local machine is the same 229 * as the remote machine (RM) entry (if it exists). 230 */ 231 char * 232 checkremote() 233 { 234 char name[MAXHOSTNAMELEN]; 235 register struct hostent *hp; 236 static char errbuf[128]; 237 238 sendtorem = 0; /* assume printer is local */ 239 if (RM != (char *)NULL) { 240 /* get the official name of the local host */ 241 gethostname(name, sizeof(name)); 242 name[sizeof(name)-1] = '\0'; 243 hp = gethostbyname(name); 244 if (hp == (struct hostent *) NULL) { 245 (void) sprintf(errbuf, 246 "unable to get official name for local machine %s", 247 name); 248 return errbuf; 249 } else (void) strcpy(name, hp->h_name); 250 251 /* get the official name of RM */ 252 hp = gethostbyname(RM); 253 if (hp == (struct hostent *) NULL) { 254 (void) sprintf(errbuf, 255 "unable to get official name for remote machine %s", 256 RM); 257 return errbuf; 258 } 259 260 /* 261 * if the two hosts are not the same, 262 * then the printer must be remote. 263 */ 264 if (strcmp(name, hp->h_name) != 0) 265 sendtorem = 1; 266 } 267 return (char *)0; 268 } 269 270 /*VARARGS1*/ 271 fatal(msg, a1, a2, a3) 272 char *msg; 273 { 274 if (from != host) 275 printf("%s: ", host); 276 printf("%s: ", name); 277 if (printer) 278 printf("%s: ", printer); 279 printf(msg, a1, a2, a3); 280 putchar('\n'); 281 exit(1); 282 } 283