1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef lint 36 static const char copyright[] = 37 "@(#) Copyright (c) 1983, 1993\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #ifndef lint 42 /* 43 static char sccsid[] = "@(#)printjob.c 8.7 (Berkeley) 5/10/95"; 44 */ 45 static const char rcsid[] = 46 "$FreeBSD$"; 47 #endif /* not lint */ 48 49 50 /* 51 * printjob -- print jobs in the queue. 52 * 53 * NOTE: the lock file is used to pass information to lpq and lprm. 54 * it does not need to be removed because file locks are dynamic. 55 */ 56 57 #include <sys/param.h> 58 #include <sys/wait.h> 59 #include <sys/stat.h> 60 #include <sys/types.h> 61 62 #include <pwd.h> 63 #include <unistd.h> 64 #include <signal.h> 65 #include <syslog.h> 66 #include <fcntl.h> 67 #include <dirent.h> 68 #include <errno.h> 69 #include <stdio.h> 70 #include <string.h> 71 #include <stdlib.h> 72 #include <sys/ioctl.h> 73 #include <termios.h> 74 #include <time.h> 75 #include "lp.h" 76 #include "lp.local.h" 77 #include "pathnames.h" 78 #include "extern.h" 79 80 #define DORETURN 0 /* dofork should return "can't fork" error */ 81 #define DOABORT 1 /* dofork should just die if fork() fails */ 82 83 /* 84 * Error tokens 85 */ 86 #define REPRINT -2 87 #define ERROR -1 88 #define OK 0 89 #define FATALERR 1 90 #define NOACCT 2 91 #define FILTERERR 3 92 #define ACCESS 4 93 94 static dev_t fdev; /* device of file pointed to by symlink */ 95 static ino_t fino; /* inode of file pointed to by symlink */ 96 static FILE *cfp; /* control file */ 97 static int child; /* id of any filters */ 98 static int job_dfcnt; /* count of datafiles in current user job */ 99 static int lfd; /* lock file descriptor */ 100 static int ofd; /* output filter file descriptor */ 101 static int ofilter; /* id of output filter, if any */ 102 static int tfd = -1; /* output filter temp file output */ 103 static int pfd; /* prstatic inter file descriptor */ 104 static int pid; /* pid of lpd process */ 105 static int prchild; /* id of pr process */ 106 static char title[80]; /* ``pr'' title */ 107 static char locale[80]; /* ``pr'' locale */ 108 109 /* these two are set from pp->daemon_user, but only if they are needed */ 110 static char *daemon_uname; /* set from pwd->pw_name */ 111 static int daemon_defgid; 112 113 static char class[32]; /* classification field */ 114 static char origin_host[MAXHOSTNAMELEN]; /* user's host machine */ 115 /* indentation size in static characters */ 116 static char indent[10] = "-i0"; 117 static char jobname[100]; /* job or file name */ 118 static char length[10] = "-l"; /* page length in lines */ 119 static char logname[32]; /* user's login name */ 120 static char pxlength[10] = "-y"; /* page length in pixels */ 121 static char pxwidth[10] = "-x"; /* page width in pixels */ 122 /* tempstderr is the filename used to catch stderr from exec-ing filters */ 123 static char tempstderr[] = "errs.XXXXXXX"; 124 static char width[10] = "-w"; /* page width in static characters */ 125 #define TFILENAME "fltXXXXXX" 126 static char tfile[] = TFILENAME; /* file name for filter output */ 127 128 static void abortpr(int _signo); 129 static void alarmhandler(int _signo); 130 static void banner(struct printer *_pp, char *_name1, char *_name2); 131 static int dofork(const struct printer *_pp, int _action); 132 static int dropit(int _c); 133 static int execfilter(struct printer *_pp, char *_f_cmd, char **_f_av, 134 int _infd, int _outfd); 135 static void init(struct printer *_pp); 136 static void openpr(const struct printer *_pp); 137 static void opennet(const struct printer *_pp); 138 static void opentty(const struct printer *_pp); 139 static void openrem(const struct printer *pp); 140 static int print(struct printer *_pp, int _format, char *_file); 141 static int printit(struct printer *_pp, char *_file); 142 static void pstatus(const struct printer *_pp, const char *_msg, ...) 143 __printflike(2, 3); 144 static char response(const struct printer *_pp); 145 static void scan_out(struct printer *_pp, int _scfd, char *_scsp, 146 int _dlm); 147 static char *scnline(int _key, char *_p, int _c); 148 static int sendfile(struct printer *_pp, int _type, char *_file, 149 char _format); 150 static int sendit(struct printer *_pp, char *_file); 151 static void sendmail(struct printer *_pp, char *_userid, int _bombed); 152 static void setty(const struct printer *_pp); 153 154 void 155 printjob(struct printer *pp) 156 { 157 struct stat stb; 158 register struct jobqueue *q, **qp; 159 struct jobqueue **queue; 160 register int i, nitems; 161 off_t pidoff; 162 int errcnt, jobcount, tempfd; 163 164 jobcount = 0; 165 init(pp); /* set up capabilities */ 166 (void) write(1, "", 1); /* ack that daemon is started */ 167 (void) close(2); /* set up log file */ 168 if (open(pp->log_file, O_WRONLY|O_APPEND, LOG_FILE_MODE) < 0) { 169 syslog(LOG_ERR, "%s: %m", pp->log_file); 170 (void) open(_PATH_DEVNULL, O_WRONLY); 171 } 172 setgid(getegid()); 173 pid = getpid(); /* for use with lprm */ 174 setpgrp(0, pid); 175 176 /* 177 * At initial lpd startup, printjob may be called with various 178 * signal handlers in effect. After that initial startup, any 179 * calls to printjob will have a *different* set of signal-handlers 180 * in effect. Make sure all handlers are the ones we want. 181 */ 182 signal(SIGCHLD, SIG_DFL); 183 signal(SIGHUP, abortpr); 184 signal(SIGINT, abortpr); 185 signal(SIGQUIT, abortpr); 186 signal(SIGTERM, abortpr); 187 188 /* 189 * uses short form file names 190 */ 191 if (chdir(pp->spool_dir) < 0) { 192 syslog(LOG_ERR, "%s: %m", pp->spool_dir); 193 exit(1); 194 } 195 if (stat(pp->lock_file, &stb) == 0 && (stb.st_mode & LFM_PRINT_DIS)) 196 exit(0); /* printing disabled */ 197 lfd = open(pp->lock_file, O_WRONLY|O_CREAT|O_EXLOCK|O_NONBLOCK, 198 LOCK_FILE_MODE); 199 if (lfd < 0) { 200 if (errno == EWOULDBLOCK) /* active daemon present */ 201 exit(0); 202 syslog(LOG_ERR, "%s: %s: %m", pp->printer, pp->lock_file); 203 exit(1); 204 } 205 /* turn off non-blocking mode (was turned on for lock effects only) */ 206 if (fcntl(lfd, F_SETFL, 0) < 0) { 207 syslog(LOG_ERR, "%s: %s: %m", pp->printer, pp->lock_file); 208 exit(1); 209 } 210 ftruncate(lfd, 0); 211 /* 212 * write process id for others to know 213 */ 214 sprintf(line, "%u\n", pid); 215 pidoff = i = strlen(line); 216 if (write(lfd, line, i) != i) { 217 syslog(LOG_ERR, "%s: %s: %m", pp->printer, pp->lock_file); 218 exit(1); 219 } 220 /* 221 * search the spool directory for work and sort by queue order. 222 */ 223 if ((nitems = getq(pp, &queue)) < 0) { 224 syslog(LOG_ERR, "%s: can't scan %s", pp->printer, 225 pp->spool_dir); 226 exit(1); 227 } 228 if (nitems == 0) /* no work to do */ 229 exit(0); 230 if (stb.st_mode & LFM_RESET_QUE) { /* reset queue flag */ 231 if (fchmod(lfd, stb.st_mode & ~LFM_RESET_QUE) < 0) 232 syslog(LOG_ERR, "%s: %s: %m", pp->printer, 233 pp->lock_file); 234 } 235 236 /* create a file which will be used to hold stderr from filters */ 237 if ((tempfd = mkstemp(tempstderr)) == -1) { 238 syslog(LOG_ERR, "%s: mkstemp(%s): %m", pp->printer, 239 tempstderr); 240 exit(1); 241 } 242 if ((i = fchmod(tempfd, 0664)) == -1) { 243 syslog(LOG_ERR, "%s: fchmod(%s): %m", pp->printer, 244 tempstderr); 245 exit(1); 246 } 247 /* lpd doesn't need it to be open, it just needs it to exist */ 248 close(tempfd); 249 250 openpr(pp); /* open printer or remote */ 251 again: 252 /* 253 * we found something to do now do it -- 254 * write the name of the current control file into the lock file 255 * so the spool queue program can tell what we're working on 256 */ 257 for (qp = queue; nitems--; free((char *) q)) { 258 q = *qp++; 259 if (stat(q->job_cfname, &stb) < 0) 260 continue; 261 errcnt = 0; 262 restart: 263 (void) lseek(lfd, pidoff, 0); 264 (void) snprintf(line, sizeof(line), "%s\n", q->job_cfname); 265 i = strlen(line); 266 if (write(lfd, line, i) != i) 267 syslog(LOG_ERR, "%s: %s: %m", pp->printer, 268 pp->lock_file); 269 if (!pp->remote) 270 i = printit(pp, q->job_cfname); 271 else 272 i = sendit(pp, q->job_cfname); 273 /* 274 * Check to see if we are supposed to stop printing or 275 * if we are to rebuild the queue. 276 */ 277 if (fstat(lfd, &stb) == 0) { 278 /* stop printing before starting next job? */ 279 if (stb.st_mode & LFM_PRINT_DIS) 280 goto done; 281 /* rebuild queue (after lpc topq) */ 282 if (stb.st_mode & LFM_RESET_QUE) { 283 for (free(q); nitems--; free(q)) 284 q = *qp++; 285 if (fchmod(lfd, stb.st_mode & ~LFM_RESET_QUE) 286 < 0) 287 syslog(LOG_WARNING, "%s: %s: %m", 288 pp->printer, pp->lock_file); 289 break; 290 } 291 } 292 if (i == OK) /* all files of this job printed */ 293 jobcount++; 294 else if (i == REPRINT && ++errcnt < 5) { 295 /* try reprinting the job */ 296 syslog(LOG_INFO, "restarting %s", pp->printer); 297 if (ofilter > 0) { 298 kill(ofilter, SIGCONT); /* to be sure */ 299 (void) close(ofd); 300 while ((i = wait(NULL)) > 0 && i != ofilter) 301 ; 302 if (i < 0) 303 syslog(LOG_WARNING, "%s: after kill(of=%d), wait() returned: %m", 304 pp->printer, ofilter); 305 ofilter = 0; 306 } 307 (void) close(pfd); /* close printer */ 308 if (ftruncate(lfd, pidoff) < 0) 309 syslog(LOG_WARNING, "%s: %s: %m", 310 pp->printer, pp->lock_file); 311 openpr(pp); /* try to reopen printer */ 312 goto restart; 313 } else { 314 syslog(LOG_WARNING, "%s: job could not be %s (%s)", 315 pp->printer, 316 pp->remote ? "sent to remote host" : "printed", 317 q->job_cfname); 318 if (i == REPRINT) { 319 /* ensure we don't attempt this job again */ 320 (void) unlink(q->job_cfname); 321 q->job_cfname[0] = 'd'; 322 (void) unlink(q->job_cfname); 323 if (logname[0]) 324 sendmail(pp, logname, FATALERR); 325 } 326 } 327 } 328 free(queue); 329 /* 330 * search the spool directory for more work. 331 */ 332 if ((nitems = getq(pp, &queue)) < 0) { 333 syslog(LOG_ERR, "%s: can't scan %s", pp->printer, 334 pp->spool_dir); 335 exit(1); 336 } 337 if (nitems == 0) { /* no more work to do */ 338 done: 339 if (jobcount > 0) { /* jobs actually printed */ 340 if (!pp->no_formfeed && !pp->tof) 341 (void) write(ofd, pp->form_feed, 342 strlen(pp->form_feed)); 343 if (pp->trailer != NULL) /* output trailer */ 344 (void) write(ofd, pp->trailer, 345 strlen(pp->trailer)); 346 } 347 (void) close(ofd); 348 (void) wait(NULL); 349 (void) unlink(tempstderr); 350 exit(0); 351 } 352 goto again; 353 } 354 355 char fonts[4][50]; /* fonts for troff */ 356 357 char ifonts[4][40] = { 358 _PATH_VFONTR, 359 _PATH_VFONTI, 360 _PATH_VFONTB, 361 _PATH_VFONTS, 362 }; 363 364 /* 365 * The remaining part is the reading of the control file (cf) 366 * and performing the various actions. 367 */ 368 static int 369 printit(struct printer *pp, char *file) 370 { 371 register int i; 372 char *cp; 373 int bombed, didignorehdr; 374 375 bombed = OK; 376 didignorehdr = 0; 377 /* 378 * open control file; ignore if no longer there. 379 */ 380 if ((cfp = fopen(file, "r")) == NULL) { 381 syslog(LOG_INFO, "%s: %s: %m", pp->printer, file); 382 return(OK); 383 } 384 /* 385 * Reset troff fonts. 386 */ 387 for (i = 0; i < 4; i++) 388 strcpy(fonts[i], ifonts[i]); 389 sprintf(&width[2], "%ld", pp->page_width); 390 strcpy(indent+2, "0"); 391 392 /* initialize job-specific count of datafiles processed */ 393 job_dfcnt = 0; 394 395 /* 396 * read the control file for work to do 397 * 398 * file format -- first character in the line is a command 399 * rest of the line is the argument. 400 * valid commands are: 401 * 402 * S -- "stat info" for symbolic link protection 403 * J -- "job name" on banner page 404 * C -- "class name" on banner page 405 * L -- "literal" user's name to print on banner 406 * T -- "title" for pr 407 * H -- "host name" of machine where lpr was done 408 * P -- "person" user's login name 409 * I -- "indent" amount to indent output 410 * R -- laser dpi "resolution" 411 * f -- "file name" name of text file to print 412 * l -- "file name" text file with control chars 413 * o -- "file name" postscript file, according to 414 * the RFC. Here it is treated like an 'f'. 415 * p -- "file name" text file to print with pr(1) 416 * t -- "file name" troff(1) file to print 417 * n -- "file name" ditroff(1) file to print 418 * d -- "file name" dvi file to print 419 * g -- "file name" plot(1G) file to print 420 * v -- "file name" plain raster file to print 421 * c -- "file name" cifplot file to print 422 * 1 -- "R font file" for troff 423 * 2 -- "I font file" for troff 424 * 3 -- "B font file" for troff 425 * 4 -- "S font file" for troff 426 * N -- "name" of file (used by lpq) 427 * U -- "unlink" name of file to remove 428 * (after we print it. (Pass 2 only)). 429 * M -- "mail" to user when done printing 430 * Z -- "locale" for pr 431 * 432 * getline reads a line and expands tabs to blanks 433 */ 434 435 /* pass 1 */ 436 437 while (getline(cfp)) 438 switch (line[0]) { 439 case 'H': 440 strlcpy(origin_host, line + 1, sizeof(origin_host)); 441 if (class[0] == '\0') { 442 strlcpy(class, line+1, sizeof(class)); 443 } 444 continue; 445 446 case 'P': 447 strlcpy(logname, line + 1, sizeof(logname)); 448 if (pp->restricted) { /* restricted */ 449 if (getpwnam(logname) == NULL) { 450 bombed = NOACCT; 451 sendmail(pp, line+1, bombed); 452 goto pass2; 453 } 454 } 455 continue; 456 457 case 'S': 458 cp = line+1; 459 i = 0; 460 while (*cp >= '0' && *cp <= '9') 461 i = i * 10 + (*cp++ - '0'); 462 fdev = i; 463 cp++; 464 i = 0; 465 while (*cp >= '0' && *cp <= '9') 466 i = i * 10 + (*cp++ - '0'); 467 fino = i; 468 continue; 469 470 case 'J': 471 if (line[1] != '\0') { 472 strlcpy(jobname, line + 1, sizeof(jobname)); 473 } else 474 strcpy(jobname, " "); 475 continue; 476 477 case 'C': 478 if (line[1] != '\0') 479 strlcpy(class, line + 1, sizeof(class)); 480 else if (class[0] == '\0') { 481 /* XXX - why call gethostname instead of 482 * just strlcpy'ing local_host? */ 483 gethostname(class, sizeof(class)); 484 class[sizeof(class) - 1] = '\0'; 485 } 486 continue; 487 488 case 'T': /* header title for pr */ 489 strlcpy(title, line + 1, sizeof(title)); 490 continue; 491 492 case 'L': /* identification line */ 493 if (!pp->no_header && !pp->header_last) 494 banner(pp, line+1, jobname); 495 continue; 496 497 case '1': /* troff fonts */ 498 case '2': 499 case '3': 500 case '4': 501 if (line[1] != '\0') { 502 strlcpy(fonts[line[0]-'1'], line + 1, 503 (size_t)50); 504 } 505 continue; 506 507 case 'W': /* page width */ 508 strlcpy(width+2, line + 1, sizeof(width) - 2); 509 continue; 510 511 case 'I': /* indent amount */ 512 strlcpy(indent+2, line + 1, sizeof(indent) - 2); 513 continue; 514 515 case 'Z': /* locale for pr */ 516 strlcpy(locale, line + 1, sizeof(locale)); 517 continue; 518 519 default: /* some file to print */ 520 /* only lowercase cmd-codes include a file-to-print */ 521 if ((line[0] < 'a') || (line[0] > 'z')) { 522 /* ignore any other lines */ 523 if (lflag <= 1) 524 continue; 525 if (!didignorehdr) { 526 syslog(LOG_INFO, "%s: in %s :", 527 pp->printer, file); 528 didignorehdr = 1; 529 } 530 syslog(LOG_INFO, "%s: ignoring line: '%c' %s", 531 pp->printer, line[0], &line[1]); 532 continue; 533 } 534 i = print(pp, line[0], line+1); 535 switch (i) { 536 case ERROR: 537 if (bombed == OK) 538 bombed = FATALERR; 539 break; 540 case REPRINT: 541 (void) fclose(cfp); 542 return(REPRINT); 543 case FILTERERR: 544 case ACCESS: 545 bombed = i; 546 sendmail(pp, logname, bombed); 547 } 548 title[0] = '\0'; 549 continue; 550 551 case 'N': 552 case 'U': 553 case 'M': 554 case 'R': 555 continue; 556 } 557 558 /* pass 2 */ 559 560 pass2: 561 fseek(cfp, 0L, 0); 562 while (getline(cfp)) 563 switch (line[0]) { 564 case 'L': /* identification line */ 565 if (!pp->no_header && pp->header_last) 566 banner(pp, line+1, jobname); 567 continue; 568 569 case 'M': 570 if (bombed < NOACCT) /* already sent if >= NOACCT */ 571 sendmail(pp, line+1, bombed); 572 continue; 573 574 case 'U': 575 if (strchr(line+1, '/')) 576 continue; 577 (void) unlink(line+1); 578 } 579 /* 580 * clean-up in case another control file exists 581 */ 582 (void) fclose(cfp); 583 (void) unlink(file); 584 return(bombed == OK ? OK : ERROR); 585 } 586 587 /* 588 * Print a file. 589 * Set up the chain [ PR [ | {IF, OF} ] ] or {IF, RF, TF, NF, DF, CF, VF}. 590 * Return -1 if a non-recoverable error occured, 591 * 2 if the filter detected some errors (but printed the job anyway), 592 * 1 if we should try to reprint this job and 593 * 0 if all is well. 594 * Note: all filters take stdin as the file, stdout as the printer, 595 * stderr as the log file, and must not ignore SIGINT. 596 */ 597 static int 598 print(struct printer *pp, int format, char *file) 599 { 600 register int n, i; 601 register char *prog; 602 int fi, fo; 603 FILE *fp; 604 char *av[15], buf[BUFSIZ]; 605 int pid, p[2], stopped; 606 union wait status; 607 struct stat stb; 608 609 if (lstat(file, &stb) < 0 || (fi = open(file, O_RDONLY)) < 0) { 610 syslog(LOG_INFO, "%s: unable to open %s ('%c' line)", 611 pp->printer, file, format); 612 return(ERROR); 613 } 614 /* 615 * Check to see if data file is a symbolic link. If so, it should 616 * still point to the same file or someone is trying to print 617 * something he shouldn't. 618 */ 619 if ((stb.st_mode & S_IFMT) == S_IFLNK && fstat(fi, &stb) == 0 && 620 (stb.st_dev != fdev || stb.st_ino != fino)) 621 return(ACCESS); 622 623 job_dfcnt++; /* increment datafile counter for this job */ 624 stopped = 0; /* output filter is not stopped */ 625 626 /* everything seems OK, start it up */ 627 if (!pp->no_formfeed && !pp->tof) { /* start on a fresh page */ 628 (void) write(ofd, pp->form_feed, strlen(pp->form_feed)); 629 pp->tof = 1; 630 } 631 if (pp->filters[LPF_INPUT] == NULL 632 && (format == 'f' || format == 'l' || format == 'o')) { 633 pp->tof = 0; 634 while ((n = read(fi, buf, BUFSIZ)) > 0) 635 if (write(ofd, buf, n) != n) { 636 (void) close(fi); 637 return(REPRINT); 638 } 639 (void) close(fi); 640 return(OK); 641 } 642 switch (format) { 643 case 'p': /* print file using 'pr' */ 644 if (pp->filters[LPF_INPUT] == NULL) { /* use output filter */ 645 prog = _PATH_PR; 646 i = 0; 647 av[i++] = "pr"; 648 av[i++] = width; 649 av[i++] = length; 650 av[i++] = "-h"; 651 av[i++] = *title ? title : " "; 652 av[i++] = "-L"; 653 av[i++] = *locale ? locale : "C"; 654 av[i++] = "-F"; 655 av[i] = 0; 656 fo = ofd; 657 goto start; 658 } 659 pipe(p); 660 if ((prchild = dofork(pp, DORETURN)) == 0) { /* child */ 661 dup2(fi, 0); /* file is stdin */ 662 dup2(p[1], 1); /* pipe is stdout */ 663 closelog(); 664 closeallfds(3); 665 execl(_PATH_PR, "pr", width, length, 666 "-h", *title ? title : " ", 667 "-L", *locale ? locale : "C", 668 "-F", (char *)0); 669 syslog(LOG_ERR, "cannot execl %s", _PATH_PR); 670 exit(2); 671 } 672 (void) close(p[1]); /* close output side */ 673 (void) close(fi); 674 if (prchild < 0) { 675 prchild = 0; 676 (void) close(p[0]); 677 return(ERROR); 678 } 679 fi = p[0]; /* use pipe for input */ 680 case 'f': /* print plain text file */ 681 prog = pp->filters[LPF_INPUT]; 682 av[1] = width; 683 av[2] = length; 684 av[3] = indent; 685 n = 4; 686 break; 687 case 'o': /* print postscript file */ 688 /* 689 * Treat this as a "plain file with control characters", and 690 * assume the standard LPF_INPUT filter will recognize that 691 * the data is postscript and know what to do with it. These 692 * 'o'-file requests could come from MacOS 10.1 systems. 693 * (later versions of MacOS 10 will explicitly use 'l') 694 * A postscript file can contain binary data, which is why 'l' 695 * is somewhat more appropriate than 'f'. 696 */ 697 /* FALLTHROUGH */ 698 case 'l': /* like 'f' but pass control characters */ 699 prog = pp->filters[LPF_INPUT]; 700 av[1] = "-c"; 701 av[2] = width; 702 av[3] = length; 703 av[4] = indent; 704 n = 5; 705 break; 706 case 'r': /* print a fortran text file */ 707 prog = pp->filters[LPF_FORTRAN]; 708 av[1] = width; 709 av[2] = length; 710 n = 3; 711 break; 712 case 't': /* print troff output */ 713 case 'n': /* print ditroff output */ 714 case 'd': /* print tex output */ 715 (void) unlink(".railmag"); 716 if ((fo = creat(".railmag", FILMOD)) < 0) { 717 syslog(LOG_ERR, "%s: cannot create .railmag", 718 pp->printer); 719 (void) unlink(".railmag"); 720 } else { 721 for (n = 0; n < 4; n++) { 722 if (fonts[n][0] != '/') 723 (void) write(fo, _PATH_VFONT, 724 sizeof(_PATH_VFONT) - 1); 725 (void) write(fo, fonts[n], strlen(fonts[n])); 726 (void) write(fo, "\n", 1); 727 } 728 (void) close(fo); 729 } 730 prog = (format == 't') ? pp->filters[LPF_TROFF] 731 : ((format == 'n') ? pp->filters[LPF_DITROFF] 732 : pp->filters[LPF_DVI]); 733 av[1] = pxwidth; 734 av[2] = pxlength; 735 n = 3; 736 break; 737 case 'c': /* print cifplot output */ 738 prog = pp->filters[LPF_CIFPLOT]; 739 av[1] = pxwidth; 740 av[2] = pxlength; 741 n = 3; 742 break; 743 case 'g': /* print plot(1G) output */ 744 prog = pp->filters[LPF_GRAPH]; 745 av[1] = pxwidth; 746 av[2] = pxlength; 747 n = 3; 748 break; 749 case 'v': /* print raster output */ 750 prog = pp->filters[LPF_RASTER]; 751 av[1] = pxwidth; 752 av[2] = pxlength; 753 n = 3; 754 break; 755 default: 756 (void) close(fi); 757 syslog(LOG_ERR, "%s: illegal format character '%c'", 758 pp->printer, format); 759 return(ERROR); 760 } 761 if (prog == NULL) { 762 (void) close(fi); 763 syslog(LOG_ERR, 764 "%s: no filter found in printcap for format character '%c'", 765 pp->printer, format); 766 return(ERROR); 767 } 768 if ((av[0] = strrchr(prog, '/')) != NULL) 769 av[0]++; 770 else 771 av[0] = prog; 772 av[n++] = "-n"; 773 av[n++] = logname; 774 av[n++] = "-h"; 775 av[n++] = origin_host; 776 av[n++] = pp->acct_file; 777 av[n] = 0; 778 fo = pfd; 779 if (ofilter > 0) { /* stop output filter */ 780 write(ofd, "\031\1", 2); 781 while ((pid = 782 wait3((int *)&status, WUNTRACED, 0)) > 0 && pid != ofilter) 783 ; 784 if (pid < 0) 785 syslog(LOG_WARNING, "%s: after stopping 'of', wait3() returned: %m", 786 pp->printer); 787 else if (status.w_stopval != WSTOPPED) { 788 (void) close(fi); 789 syslog(LOG_WARNING, 790 "%s: output filter died " 791 "(pid=%d retcode=%d termsig=%d)", 792 pp->printer, ofilter, status.w_retcode, 793 status.w_termsig); 794 return(REPRINT); 795 } 796 stopped++; 797 } 798 start: 799 if ((child = dofork(pp, DORETURN)) == 0) { /* child */ 800 dup2(fi, 0); 801 dup2(fo, 1); 802 /* setup stderr for the filter (child process) 803 * so it goes to our temporary errors file */ 804 n = open(tempstderr, O_WRONLY|O_TRUNC, 0664); 805 if (n >= 0) 806 dup2(n, 2); 807 closelog(); 808 closeallfds(3); 809 execv(prog, av); 810 syslog(LOG_ERR, "%s: cannot execv(%s): %m", pp->printer, 811 prog); 812 exit(2); 813 } 814 (void) close(fi); 815 if (child < 0) 816 status.w_retcode = 100; 817 else { 818 while ((pid = wait((int *)&status)) > 0 && pid != child) 819 ; 820 if (pid < 0) { 821 status.w_retcode = 100; 822 syslog(LOG_WARNING, "%s: after execv(%s), wait() returned: %m", 823 pp->printer, prog); 824 } 825 } 826 child = 0; 827 prchild = 0; 828 if (stopped) { /* restart output filter */ 829 if (kill(ofilter, SIGCONT) < 0) { 830 syslog(LOG_ERR, "cannot restart output filter"); 831 exit(1); 832 } 833 } 834 pp->tof = 0; 835 836 /* Copy the filter's output to "lf" logfile */ 837 if ((fp = fopen(tempstderr, "r"))) { 838 while (fgets(buf, sizeof(buf), fp)) 839 fputs(buf, stderr); 840 fclose(fp); 841 } 842 843 if (!WIFEXITED(status)) { 844 syslog(LOG_WARNING, "%s: filter '%c' terminated (termsig=%d)", 845 pp->printer, format, status.w_termsig); 846 return(ERROR); 847 } 848 switch (status.w_retcode) { 849 case 0: 850 pp->tof = 1; 851 return(OK); 852 case 1: 853 return(REPRINT); 854 case 2: 855 return(ERROR); 856 default: 857 syslog(LOG_WARNING, "%s: filter '%c' exited (retcode=%d)", 858 pp->printer, format, status.w_retcode); 859 return(FILTERERR); 860 } 861 } 862 863 /* 864 * Send the daemon control file (cf) and any data files. 865 * Return -1 if a non-recoverable error occured, 1 if a recoverable error and 866 * 0 if all is well. 867 */ 868 static int 869 sendit(struct printer *pp, char *file) 870 { 871 register int i, err = OK; 872 char *cp, last[BUFSIZ]; 873 874 /* 875 * open control file 876 */ 877 if ((cfp = fopen(file, "r")) == NULL) 878 return(OK); 879 880 /* initialize job-specific count of datafiles processed */ 881 job_dfcnt = 0; 882 883 /* 884 * read the control file for work to do 885 * 886 * file format -- first character in the line is a command 887 * rest of the line is the argument. 888 * commands of interest are: 889 * 890 * a-z -- "file name" name of file to print 891 * U -- "unlink" name of file to remove 892 * (after we print it. (Pass 2 only)). 893 */ 894 895 /* 896 * pass 1 897 */ 898 while (getline(cfp)) { 899 again: 900 if (line[0] == 'S') { 901 cp = line+1; 902 i = 0; 903 while (*cp >= '0' && *cp <= '9') 904 i = i * 10 + (*cp++ - '0'); 905 fdev = i; 906 cp++; 907 i = 0; 908 while (*cp >= '0' && *cp <= '9') 909 i = i * 10 + (*cp++ - '0'); 910 fino = i; 911 } else if (line[0] == 'H') { 912 strlcpy(origin_host, line + 1, sizeof(origin_host)); 913 if (class[0] == '\0') { 914 strlcpy(class, line + 1, sizeof(class)); 915 } 916 } else if (line[0] == 'P') { 917 strlcpy(logname, line + 1, sizeof(logname)); 918 if (pp->restricted) { /* restricted */ 919 if (getpwnam(logname) == NULL) { 920 sendmail(pp, line+1, NOACCT); 921 err = ERROR; 922 break; 923 } 924 } 925 } else if (line[0] == 'I') { 926 strlcpy(indent+2, line + 1, sizeof(indent) - 2); 927 } else if (line[0] >= 'a' && line[0] <= 'z') { 928 strcpy(last, line); 929 while ((i = getline(cfp)) != 0) 930 if (strcmp(last, line)) 931 break; 932 switch (sendfile(pp, '\3', last+1, *last)) { 933 case OK: 934 if (i) 935 goto again; 936 break; 937 case REPRINT: 938 (void) fclose(cfp); 939 return(REPRINT); 940 case ACCESS: 941 sendmail(pp, logname, ACCESS); 942 case ERROR: 943 err = ERROR; 944 } 945 break; 946 } 947 } 948 if (err == OK && sendfile(pp, '\2', file, '\0') > 0) { 949 (void) fclose(cfp); 950 return(REPRINT); 951 } 952 /* 953 * pass 2 954 */ 955 fseek(cfp, 0L, 0); 956 while (getline(cfp)) 957 if (line[0] == 'U' && !strchr(line+1, '/')) 958 (void) unlink(line+1); 959 /* 960 * clean-up in case another control file exists 961 */ 962 (void) fclose(cfp); 963 (void) unlink(file); 964 return(err); 965 } 966 967 /* 968 * Send a data file to the remote machine and spool it. 969 * Return positive if we should try resending. 970 */ 971 static int 972 sendfile(struct printer *pp, int type, char *file, char format) 973 { 974 int i, amt; 975 struct stat stb; 976 char *av[15], *filtcmd; 977 char buf[BUFSIZ], opt_c[4], opt_h[4], opt_n[4]; 978 int filtstat, narg, resp, sfd, sfres, sizerr, statrc; 979 980 statrc = lstat(file, &stb); 981 if (statrc < 0) { 982 syslog(LOG_ERR, "%s: error from lstat(%s): %m", 983 pp->printer, file); 984 return (ERROR); 985 } 986 sfd = open(file, O_RDONLY); 987 if (sfd < 0) { 988 syslog(LOG_ERR, "%s: error from open(%s,O_RDONLY): %m", 989 pp->printer, file); 990 return (ERROR); 991 } 992 /* 993 * Check to see if data file is a symbolic link. If so, it should 994 * still point to the same file or someone is trying to print something 995 * he shouldn't. 996 */ 997 if ((stb.st_mode & S_IFMT) == S_IFLNK && fstat(sfd, &stb) == 0 && 998 (stb.st_dev != fdev || stb.st_ino != fino)) { 999 close(sfd); 1000 return (ACCESS); 1001 } 1002 1003 /* Everything seems OK for reading the file, now to send it */ 1004 filtcmd = NULL; 1005 sizerr = 0; 1006 tfd = -1; 1007 if (type == '\3') { 1008 /* 1009 * Type == 3 means this is a datafile, not a control file. 1010 * Increment the counter of data-files in this job, and 1011 * then check for input or output filters (which are only 1012 * applied to datafiles, not control files). 1013 */ 1014 job_dfcnt++; 1015 1016 /* 1017 * Note that here we are filtering datafiles, one at a time, 1018 * as they are sent to the remote machine. Here, the *only* 1019 * difference between an input filter (`if=') and an output 1020 * filter (`of=') is the argument list that the filter is 1021 * started up with. Here, the output filter is executed 1022 * for each individual file as it is sent. This is not the 1023 * same as local print queues, where the output filter is 1024 * started up once, and then all jobs are passed thru that 1025 * single invocation of the output filter. 1026 * 1027 * Also note that a queue for a remote-machine can have an 1028 * input filter or an output filter, but not both. 1029 */ 1030 if (pp->filters[LPF_INPUT]) { 1031 filtcmd = pp->filters[LPF_INPUT]; 1032 av[0] = filtcmd; 1033 narg = 0; 1034 strcpy(opt_c, "-c"); 1035 strcpy(opt_h, "-h"); 1036 strcpy(opt_n, "-n"); 1037 if (format == 'l') 1038 av[++narg] = opt_c; 1039 av[++narg] = width; 1040 av[++narg] = length; 1041 av[++narg] = indent; 1042 av[++narg] = opt_n; 1043 av[++narg] = logname; 1044 av[++narg] = opt_h; 1045 av[++narg] = origin_host; 1046 av[++narg] = pp->acct_file; 1047 av[++narg] = NULL; 1048 } else if (pp->filters[LPF_OUTPUT]) { 1049 filtcmd = pp->filters[LPF_OUTPUT]; 1050 av[0] = filtcmd; 1051 narg = 0; 1052 av[++narg] = width; 1053 av[++narg] = length; 1054 av[++narg] = NULL; 1055 } 1056 } 1057 if (filtcmd) { 1058 /* 1059 * If there is an input or output filter, we have to run 1060 * the datafile thru that filter and store the result as 1061 * a temporary spool file, because the protocol requires 1062 * that we send the remote host the file-size before we 1063 * start to send any of the data. 1064 */ 1065 strcpy(tfile, TFILENAME); 1066 tfd = mkstemp(tfile); 1067 if (tfd == -1) { 1068 syslog(LOG_ERR, "%s: mkstemp(%s): %m", pp->printer, 1069 TFILENAME); 1070 sfres = ERROR; 1071 goto return_sfres; 1072 } 1073 filtstat = execfilter(pp, filtcmd, av, sfd, tfd); 1074 1075 /* process the return-code from the filter */ 1076 switch (filtstat) { 1077 case 0: 1078 break; 1079 case 1: 1080 sfres = REPRINT; 1081 goto return_sfres; 1082 case 2: 1083 sfres = ERROR; 1084 goto return_sfres; 1085 default: 1086 syslog(LOG_WARNING, 1087 "%s: filter '%c' exited (retcode=%d)", 1088 pp->printer, format, filtstat); 1089 sfres = FILTERERR; 1090 goto return_sfres; 1091 } 1092 statrc = fstat(tfd, &stb); /* to find size of tfile */ 1093 if (statrc < 0) { 1094 syslog(LOG_ERR, 1095 "%s: error processing 'if', fstat(%s): %m", 1096 pp->printer, tfile); 1097 sfres = ERROR; 1098 goto return_sfres; 1099 } 1100 close(sfd); 1101 sfd = tfd; 1102 lseek(sfd, 0, SEEK_SET); 1103 } 1104 1105 (void) sprintf(buf, "%c%qd %s\n", type, stb.st_size, file); 1106 amt = strlen(buf); 1107 for (i = 0; ; i++) { 1108 if (write(pfd, buf, amt) != amt || 1109 (resp = response(pp)) < 0 || resp == '\1') { 1110 sfres = REPRINT; 1111 goto return_sfres; 1112 } else if (resp == '\0') 1113 break; 1114 if (i == 0) 1115 pstatus(pp, 1116 "no space on remote; waiting for queue to drain"); 1117 if (i == 10) 1118 syslog(LOG_ALERT, "%s: can't send to %s; queue full", 1119 pp->printer, pp->remote_host); 1120 sleep(5 * 60); 1121 } 1122 if (i) 1123 pstatus(pp, "sending to %s", pp->remote_host); 1124 if (type == '\3') 1125 trstat_init(pp, file, job_dfcnt); 1126 for (i = 0; i < stb.st_size; i += BUFSIZ) { 1127 amt = BUFSIZ; 1128 if (i + amt > stb.st_size) 1129 amt = stb.st_size - i; 1130 if (sizerr == 0 && read(sfd, buf, amt) != amt) 1131 sizerr = 1; 1132 if (write(pfd, buf, amt) != amt) { 1133 sfres = REPRINT; 1134 goto return_sfres; 1135 } 1136 } 1137 1138 if (sizerr) { 1139 syslog(LOG_INFO, "%s: %s: changed size", pp->printer, file); 1140 /* tell recvjob to ignore this file */ 1141 (void) write(pfd, "\1", 1); 1142 sfres = ERROR; 1143 goto return_sfres; 1144 } 1145 if (write(pfd, "", 1) != 1 || response(pp)) { 1146 sfres = REPRINT; 1147 goto return_sfres; 1148 } 1149 if (type == '\3') 1150 trstat_write(pp, TR_SENDING, stb.st_size, logname, 1151 pp->remote_host, origin_host); 1152 sfres = OK; 1153 1154 return_sfres: 1155 (void)close(sfd); 1156 if (tfd != -1) { 1157 /* 1158 * If tfd is set, then it is the same value as sfd, and 1159 * therefore it is already closed at this point. All 1160 * we need to do is remove the temporary file. 1161 */ 1162 tfd = -1; 1163 unlink(tfile); 1164 } 1165 return (sfres); 1166 } 1167 1168 /* 1169 * This routine is called to execute one of the filters as was 1170 * specified in a printcap entry. While the child-process will read 1171 * all of 'infd', it is up to the caller to close that file descriptor 1172 * in the parent process. 1173 */ 1174 static int 1175 execfilter(struct printer *pp, char *f_cmd, char *f_av[], int infd, int outfd) 1176 { 1177 int errfd, fpid, wpid; 1178 FILE *errfp; 1179 union wait status; /* XXX */ 1180 char buf[BUFSIZ], *slash; 1181 1182 fpid = dofork(pp, DORETURN); 1183 if (fpid != 0) { 1184 /* 1185 * This is the parent process, which just waits for the child 1186 * to complete and then returns the result. Note that it is 1187 * the child process which reads the input stream. 1188 */ 1189 if (fpid < 0) 1190 status.w_retcode = 100; 1191 else { 1192 while ((wpid = wait((int *)&status)) > 0 && 1193 wpid != fpid) 1194 ; 1195 if (wpid < 0) { 1196 status.w_retcode = 100; 1197 syslog(LOG_WARNING, 1198 "%s: after execv(%s), wait() returned: %m", 1199 pp->printer, f_cmd); 1200 } 1201 } 1202 1203 /* 1204 * Copy everything the filter wrote to stderr from our 1205 * temporary errors file to the "lf=" logfile. 1206 */ 1207 errfp = fopen(tempstderr, "r"); 1208 if (errfp) { 1209 while (fgets(buf, sizeof(buf), errfp)) 1210 fputs(buf, stderr); 1211 fclose(errfp); 1212 } 1213 1214 return (status.w_retcode); 1215 } 1216 1217 /* 1218 * This is the child process, which is the one that executes the 1219 * given filter. 1220 */ 1221 /* 1222 * If the first parameter has any slashes in it, then change it 1223 * to point to the first character after the last slash. 1224 */ 1225 slash = strrchr(f_av[0], '/'); 1226 if (slash != NULL) 1227 f_av[0] = slash + 1; 1228 /* 1229 * XXX - in the future, this should setup an explicit list of 1230 * environment variables and use execve()! 1231 */ 1232 1233 /* 1234 * Setup stdin, stdout, and stderr as we want them when the filter 1235 * is running. Stderr is setup so it points to a temporary errors 1236 * file, and the parent process will copy that temporary file to 1237 * the real logfile after the filter completes. 1238 */ 1239 dup2(infd, 0); 1240 dup2(outfd, 1); 1241 errfd = open(tempstderr, O_WRONLY|O_TRUNC, 0664); 1242 if (errfd >= 0) 1243 dup2(errfd, 2); 1244 closelog(); 1245 closeallfds(3); 1246 execv(f_cmd, f_av); 1247 syslog(LOG_ERR, "%s: cannot execv(%s): %m", pp->printer, f_cmd); 1248 exit(2); 1249 /* NOTREACHED */ 1250 } 1251 1252 /* 1253 * Check to make sure there have been no errors and that both programs 1254 * are in sync with eachother. 1255 * Return non-zero if the connection was lost. 1256 */ 1257 static char 1258 response(const struct printer *pp) 1259 { 1260 char resp; 1261 1262 if (read(pfd, &resp, 1) != 1) { 1263 syslog(LOG_INFO, "%s: lost connection", pp->printer); 1264 return(-1); 1265 } 1266 return(resp); 1267 } 1268 1269 /* 1270 * Banner printing stuff 1271 */ 1272 static void 1273 banner(struct printer *pp, char *name1, char *name2) 1274 { 1275 time_t tvec; 1276 1277 time(&tvec); 1278 if (!pp->no_formfeed && !pp->tof) 1279 (void) write(ofd, pp->form_feed, strlen(pp->form_feed)); 1280 if (pp->short_banner) { /* short banner only */ 1281 if (class[0]) { 1282 (void) write(ofd, class, strlen(class)); 1283 (void) write(ofd, ":", 1); 1284 } 1285 (void) write(ofd, name1, strlen(name1)); 1286 (void) write(ofd, " Job: ", 7); 1287 (void) write(ofd, name2, strlen(name2)); 1288 (void) write(ofd, " Date: ", 8); 1289 (void) write(ofd, ctime(&tvec), 24); 1290 (void) write(ofd, "\n", 1); 1291 } else { /* normal banner */ 1292 (void) write(ofd, "\n\n\n", 3); 1293 scan_out(pp, ofd, name1, '\0'); 1294 (void) write(ofd, "\n\n", 2); 1295 scan_out(pp, ofd, name2, '\0'); 1296 if (class[0]) { 1297 (void) write(ofd,"\n\n\n",3); 1298 scan_out(pp, ofd, class, '\0'); 1299 } 1300 (void) write(ofd, "\n\n\n\n\t\t\t\t\tJob: ", 15); 1301 (void) write(ofd, name2, strlen(name2)); 1302 (void) write(ofd, "\n\t\t\t\t\tDate: ", 12); 1303 (void) write(ofd, ctime(&tvec), 24); 1304 (void) write(ofd, "\n", 1); 1305 } 1306 if (!pp->no_formfeed) 1307 (void) write(ofd, pp->form_feed, strlen(pp->form_feed)); 1308 pp->tof = 1; 1309 } 1310 1311 static char * 1312 scnline(int key, char *p, int c) 1313 { 1314 register int scnwidth; 1315 1316 for (scnwidth = WIDTH; --scnwidth;) { 1317 key <<= 1; 1318 *p++ = key & 0200 ? c : BACKGND; 1319 } 1320 return (p); 1321 } 1322 1323 #define TRC(q) (((q)-' ')&0177) 1324 1325 static void 1326 scan_out(struct printer *pp, int scfd, char *scsp, int dlm) 1327 { 1328 register char *strp; 1329 register int nchrs, j; 1330 char outbuf[LINELEN+1], *sp, c, cc; 1331 int d, scnhgt; 1332 1333 for (scnhgt = 0; scnhgt++ < HEIGHT+DROP; ) { 1334 strp = &outbuf[0]; 1335 sp = scsp; 1336 for (nchrs = 0; ; ) { 1337 d = dropit(c = TRC(cc = *sp++)); 1338 if ((!d && scnhgt > HEIGHT) || (scnhgt <= DROP && d)) 1339 for (j = WIDTH; --j;) 1340 *strp++ = BACKGND; 1341 else 1342 strp = scnline(scnkey[(int)c][scnhgt-1-d], strp, cc); 1343 if (*sp == dlm || *sp == '\0' || 1344 nchrs++ >= pp->page_width/(WIDTH+1)-1) 1345 break; 1346 *strp++ = BACKGND; 1347 *strp++ = BACKGND; 1348 } 1349 while (*--strp == BACKGND && strp >= outbuf) 1350 ; 1351 strp++; 1352 *strp++ = '\n'; 1353 (void) write(scfd, outbuf, strp-outbuf); 1354 } 1355 } 1356 1357 static int 1358 dropit(int c) 1359 { 1360 switch(c) { 1361 1362 case TRC('_'): 1363 case TRC(';'): 1364 case TRC(','): 1365 case TRC('g'): 1366 case TRC('j'): 1367 case TRC('p'): 1368 case TRC('q'): 1369 case TRC('y'): 1370 return (DROP); 1371 1372 default: 1373 return (0); 1374 } 1375 } 1376 1377 /* 1378 * sendmail --- 1379 * tell people about job completion 1380 */ 1381 static void 1382 sendmail(struct printer *pp, char *userid, int bombed) 1383 { 1384 register int i; 1385 int p[2], s; 1386 register const char *cp; 1387 struct stat stb; 1388 FILE *fp; 1389 1390 pipe(p); 1391 if ((s = dofork(pp, DORETURN)) == 0) { /* child */ 1392 dup2(p[0], 0); 1393 closelog(); 1394 closeallfds(3); 1395 if ((cp = strrchr(_PATH_SENDMAIL, '/')) != NULL) 1396 cp++; 1397 else 1398 cp = _PATH_SENDMAIL; 1399 execl(_PATH_SENDMAIL, cp, "-t", (char *)0); 1400 _exit(0); 1401 } else if (s > 0) { /* parent */ 1402 dup2(p[1], 1); 1403 printf("To: %s@%s\n", userid, origin_host); 1404 printf("Subject: %s printer job \"%s\"\n", pp->printer, 1405 *jobname ? jobname : "<unknown>"); 1406 printf("Reply-To: root@%s\n\n", local_host); 1407 printf("Your printer job "); 1408 if (*jobname) 1409 printf("(%s) ", jobname); 1410 1411 switch (bombed) { 1412 case OK: 1413 cp = "OK"; 1414 printf("\ncompleted successfully\n"); 1415 break; 1416 default: 1417 case FATALERR: 1418 cp = "FATALERR"; 1419 printf("\ncould not be printed\n"); 1420 break; 1421 case NOACCT: 1422 cp = "NOACCT"; 1423 printf("\ncould not be printed without an account on %s\n", 1424 local_host); 1425 break; 1426 case FILTERERR: 1427 cp = "FILTERERR"; 1428 if (stat(tempstderr, &stb) < 0 || stb.st_size == 0 1429 || (fp = fopen(tempstderr, "r")) == NULL) { 1430 printf("\nhad some errors and may not have printed\n"); 1431 break; 1432 } 1433 printf("\nhad the following errors and may not have printed:\n"); 1434 while ((i = getc(fp)) != EOF) 1435 putchar(i); 1436 (void) fclose(fp); 1437 break; 1438 case ACCESS: 1439 cp = "ACCESS"; 1440 printf("\nwas not printed because it was not linked to the original file\n"); 1441 } 1442 fflush(stdout); 1443 (void) close(1); 1444 } else { 1445 syslog(LOG_WARNING, "unable to send mail to %s: %m", userid); 1446 return; 1447 } 1448 (void) close(p[0]); 1449 (void) close(p[1]); 1450 wait(NULL); 1451 syslog(LOG_INFO, "mail sent to user %s about job %s on printer %s (%s)", 1452 userid, *jobname ? jobname : "<unknown>", pp->printer, cp); 1453 } 1454 1455 /* 1456 * dofork - fork with retries on failure 1457 */ 1458 static int 1459 dofork(const struct printer *pp, int action) 1460 { 1461 int i, fail, forkpid; 1462 struct passwd *pwd; 1463 1464 forkpid = -1; 1465 if (daemon_uname == NULL) { 1466 pwd = getpwuid(pp->daemon_user); 1467 if (pwd == NULL) { 1468 syslog(LOG_ERR, "%s: Can't lookup default daemon uid (%ld) in password file", 1469 pp->printer, pp->daemon_user); 1470 goto error_ret; 1471 } 1472 daemon_uname = strdup(pwd->pw_name); 1473 daemon_defgid = pwd->pw_gid; 1474 } 1475 1476 for (i = 0; i < 20; i++) { 1477 forkpid = fork(); 1478 if (forkpid < 0) { 1479 sleep((unsigned)(i*i)); 1480 continue; 1481 } 1482 /* 1483 * Child should run as daemon instead of root 1484 */ 1485 if (forkpid == 0) { 1486 errno = 0; 1487 fail = initgroups(daemon_uname, daemon_defgid); 1488 if (fail) { 1489 syslog(LOG_ERR, "%s: initgroups(%s,%u): %m", 1490 pp->printer, daemon_uname, daemon_defgid); 1491 break; 1492 } 1493 fail = setgid(daemon_defgid); 1494 if (fail) { 1495 syslog(LOG_ERR, "%s: setgid(%u): %m", 1496 pp->printer, daemon_defgid); 1497 break; 1498 } 1499 fail = setuid(pp->daemon_user); 1500 if (fail) { 1501 syslog(LOG_ERR, "%s: setuid(%ld): %m", 1502 pp->printer, pp->daemon_user); 1503 break; 1504 } 1505 } 1506 return forkpid; 1507 } 1508 1509 /* 1510 * An error occurred. If the error is in the child process, then 1511 * this routine MUST always exit(). DORETURN only effects how 1512 * errors should be handled in the parent process. 1513 */ 1514 error_ret: 1515 if (forkpid == 0) { 1516 syslog(LOG_ERR, "%s: dofork(): aborting child process...", 1517 pp->printer); 1518 exit(1); 1519 } 1520 syslog(LOG_ERR, "%s: dofork(): failure in fork", pp->printer); 1521 1522 sleep(1); /* throttle errors, as a safety measure */ 1523 switch (action) { 1524 case DORETURN: 1525 return -1; 1526 default: 1527 syslog(LOG_ERR, "bad action (%d) to dofork", action); 1528 /* FALLTHROUGH */ 1529 case DOABORT: 1530 exit(1); 1531 } 1532 /*NOTREACHED*/ 1533 } 1534 1535 /* 1536 * Kill child processes to abort current job. 1537 */ 1538 static void 1539 abortpr(int signo __unused) 1540 { 1541 1542 (void) unlink(tempstderr); 1543 kill(0, SIGINT); 1544 if (ofilter > 0) 1545 kill(ofilter, SIGCONT); 1546 while (wait(NULL) > 0) 1547 ; 1548 if (ofilter > 0 && tfd != -1) 1549 unlink(tfile); 1550 exit(0); 1551 } 1552 1553 static void 1554 init(struct printer *pp) 1555 { 1556 char *s; 1557 1558 sprintf(&width[2], "%ld", pp->page_width); 1559 sprintf(&length[2], "%ld", pp->page_length); 1560 sprintf(&pxwidth[2], "%ld", pp->page_pwidth); 1561 sprintf(&pxlength[2], "%ld", pp->page_plength); 1562 if ((s = checkremote(pp)) != 0) { 1563 syslog(LOG_WARNING, "%s", s); 1564 free(s); 1565 } 1566 } 1567 1568 void 1569 startprinting(const char *printer) 1570 { 1571 struct printer myprinter, *pp = &myprinter; 1572 int status; 1573 1574 init_printer(pp); 1575 status = getprintcap(printer, pp); 1576 switch(status) { 1577 case PCAPERR_OSERR: 1578 syslog(LOG_ERR, "can't open printer description file: %m"); 1579 exit(1); 1580 case PCAPERR_NOTFOUND: 1581 syslog(LOG_ERR, "unknown printer: %s", printer); 1582 exit(1); 1583 case PCAPERR_TCLOOP: 1584 fatal(pp, "potential reference loop detected in printcap file"); 1585 default: 1586 break; 1587 } 1588 printjob(pp); 1589 } 1590 1591 /* 1592 * Acquire line printer or remote connection. 1593 */ 1594 static void 1595 openpr(const struct printer *pp) 1596 { 1597 int p[2]; 1598 char *cp; 1599 1600 if (pp->remote) { 1601 openrem(pp); 1602 /* 1603 * Lpd does support the setting of 'of=' filters for 1604 * jobs going to remote machines, but that does not 1605 * have the same meaning as 'of=' does when handling 1606 * local print queues. For remote machines, all 'of=' 1607 * filter processing is handled in sendfile(), and that 1608 * does not use these global "output filter" variables. 1609 */ 1610 ofd = -1; 1611 ofilter = 0; 1612 return; 1613 } else if (*pp->lp) { 1614 if ((cp = strchr(pp->lp, '@')) != NULL) 1615 opennet(pp); 1616 else 1617 opentty(pp); 1618 } else { 1619 syslog(LOG_ERR, "%s: no line printer device or host name", 1620 pp->printer); 1621 exit(1); 1622 } 1623 1624 /* 1625 * Start up an output filter, if needed. 1626 */ 1627 if (pp->filters[LPF_OUTPUT] && !pp->filters[LPF_INPUT] && !ofilter) { 1628 pipe(p); 1629 if (pp->remote) { 1630 strcpy(tfile, TFILENAME); 1631 tfd = mkstemp(tfile); 1632 } 1633 if ((ofilter = dofork(pp, DOABORT)) == 0) { /* child */ 1634 dup2(p[0], 0); /* pipe is std in */ 1635 /* tfile/printer is stdout */ 1636 dup2(pp->remote ? tfd : pfd, 1); 1637 closelog(); 1638 closeallfds(3); 1639 if ((cp = strrchr(pp->filters[LPF_OUTPUT], '/')) == NULL) 1640 cp = pp->filters[LPF_OUTPUT]; 1641 else 1642 cp++; 1643 execl(pp->filters[LPF_OUTPUT], cp, width, length, 1644 (char *)0); 1645 syslog(LOG_ERR, "%s: %s: %m", pp->printer, 1646 pp->filters[LPF_OUTPUT]); 1647 exit(1); 1648 } 1649 (void) close(p[0]); /* close input side */ 1650 ofd = p[1]; /* use pipe for output */ 1651 } else { 1652 ofd = pfd; 1653 ofilter = 0; 1654 } 1655 } 1656 1657 /* 1658 * Printer connected directly to the network 1659 * or to a terminal server on the net 1660 */ 1661 static void 1662 opennet(const struct printer *pp) 1663 { 1664 register int i; 1665 int resp; 1666 u_long port; 1667 char *ep; 1668 void (*savealrm)(int); 1669 1670 port = strtoul(pp->lp, &ep, 0); 1671 if (*ep != '@' || port > 65535) { 1672 syslog(LOG_ERR, "%s: bad port number: %s", pp->printer, 1673 pp->lp); 1674 exit(1); 1675 } 1676 ep++; 1677 1678 for (i = 1; ; i = i < 256 ? i << 1 : i) { 1679 resp = -1; 1680 savealrm = signal(SIGALRM, alarmhandler); 1681 alarm(pp->conn_timeout); 1682 pfd = getport(pp, ep, port); 1683 alarm(0); 1684 (void)signal(SIGALRM, savealrm); 1685 if (pfd < 0 && errno == ECONNREFUSED) 1686 resp = 1; 1687 else if (pfd >= 0) { 1688 /* 1689 * need to delay a bit for rs232 lines 1690 * to stabilize in case printer is 1691 * connected via a terminal server 1692 */ 1693 delay(500); 1694 break; 1695 } 1696 if (i == 1) { 1697 if (resp < 0) 1698 pstatus(pp, "waiting for %s to come up", 1699 pp->lp); 1700 else 1701 pstatus(pp, 1702 "waiting for access to printer on %s", 1703 pp->lp); 1704 } 1705 sleep(i); 1706 } 1707 pstatus(pp, "sending to %s port %lu", ep, port); 1708 } 1709 1710 /* 1711 * Printer is connected to an RS232 port on this host 1712 */ 1713 static void 1714 opentty(const struct printer *pp) 1715 { 1716 register int i; 1717 1718 for (i = 1; ; i = i < 32 ? i << 1 : i) { 1719 pfd = open(pp->lp, pp->rw ? O_RDWR : O_WRONLY); 1720 if (pfd >= 0) { 1721 delay(500); 1722 break; 1723 } 1724 if (errno == ENOENT) { 1725 syslog(LOG_ERR, "%s: %m", pp->lp); 1726 exit(1); 1727 } 1728 if (i == 1) 1729 pstatus(pp, 1730 "waiting for %s to become ready (offline?)", 1731 pp->printer); 1732 sleep(i); 1733 } 1734 if (isatty(pfd)) 1735 setty(pp); 1736 pstatus(pp, "%s is ready and printing", pp->printer); 1737 } 1738 1739 /* 1740 * Printer is on a remote host 1741 */ 1742 static void 1743 openrem(const struct printer *pp) 1744 { 1745 register int i; 1746 int resp; 1747 void (*savealrm)(int); 1748 1749 for (i = 1; ; i = i < 256 ? i << 1 : i) { 1750 resp = -1; 1751 savealrm = signal(SIGALRM, alarmhandler); 1752 alarm(pp->conn_timeout); 1753 pfd = getport(pp, pp->remote_host, 0); 1754 alarm(0); 1755 (void)signal(SIGALRM, savealrm); 1756 if (pfd >= 0) { 1757 if ((writel(pfd, "\2", pp->remote_queue, "\n", 1758 (char *)0) 1759 == 2 + strlen(pp->remote_queue)) 1760 && (resp = response(pp)) == 0) 1761 break; 1762 (void) close(pfd); 1763 } 1764 if (i == 1) { 1765 if (resp < 0) 1766 pstatus(pp, "waiting for %s to come up", 1767 pp->remote_host); 1768 else { 1769 pstatus(pp, 1770 "waiting for queue to be enabled on %s", 1771 pp->remote_host); 1772 i = 256; 1773 } 1774 } 1775 sleep(i); 1776 } 1777 pstatus(pp, "sending to %s", pp->remote_host); 1778 } 1779 1780 /* 1781 * setup tty lines. 1782 */ 1783 static void 1784 setty(const struct printer *pp) 1785 { 1786 struct termios ttybuf; 1787 1788 if (ioctl(pfd, TIOCEXCL, (char *)0) < 0) { 1789 syslog(LOG_ERR, "%s: ioctl(TIOCEXCL): %m", pp->printer); 1790 exit(1); 1791 } 1792 if (tcgetattr(pfd, &ttybuf) < 0) { 1793 syslog(LOG_ERR, "%s: tcgetattr: %m", pp->printer); 1794 exit(1); 1795 } 1796 if (pp->baud_rate > 0) 1797 cfsetspeed(&ttybuf, pp->baud_rate); 1798 if (pp->mode_set) { 1799 char *s = strdup(pp->mode_set), *tmp; 1800 1801 while ((tmp = strsep(&s, ",")) != NULL) { 1802 (void) msearch(tmp, &ttybuf); 1803 } 1804 } 1805 if (pp->mode_set != 0 || pp->baud_rate > 0) { 1806 if (tcsetattr(pfd, TCSAFLUSH, &ttybuf) == -1) { 1807 syslog(LOG_ERR, "%s: tcsetattr: %m", pp->printer); 1808 } 1809 } 1810 } 1811 1812 #ifdef __STDC__ 1813 #include <stdarg.h> 1814 #else 1815 #include <varargs.h> 1816 #endif 1817 1818 static void 1819 #ifdef __STDC__ 1820 pstatus(const struct printer *pp, const char *msg, ...) 1821 #else 1822 pstatus(pp, msg, va_alist) 1823 const struct printer *pp; 1824 char *msg; 1825 va_dcl 1826 #endif 1827 { 1828 int fd; 1829 char *buf; 1830 va_list ap; 1831 #ifdef __STDC__ 1832 va_start(ap, msg); 1833 #else 1834 va_start(ap); 1835 #endif 1836 1837 umask(0); 1838 fd = open(pp->status_file, O_WRONLY|O_CREAT|O_EXLOCK, STAT_FILE_MODE); 1839 if (fd < 0) { 1840 syslog(LOG_ERR, "%s: %s: %m", pp->printer, pp->status_file); 1841 exit(1); 1842 } 1843 ftruncate(fd, 0); 1844 vasprintf(&buf, msg, ap); 1845 va_end(ap); 1846 writel(fd, buf, "\n", (char *)0); 1847 close(fd); 1848 free(buf); 1849 } 1850 1851 void 1852 alarmhandler(int signo __unused) 1853 { 1854 /* the signal is ignored */ 1855 /* (the '__unused' is just to avoid a compile-time warning) */ 1856 } 1857