printjob.c revision 97781
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 36static 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/* 43static char sccsid[] = "@(#)printjob.c 8.7 (Berkeley) 5/10/95"; 44*/ 45static const char rcsid[] = 46 "$FreeBSD: head/usr.sbin/lpr/lpd/printjob.c 97781 2002-06-03 20:47:01Z gad $"; 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 94static dev_t fdev; /* device of file pointed to by symlink */ 95static ino_t fino; /* inode of file pointed to by symlink */ 96static FILE *cfp; /* control file */ 97static int child; /* id of any filters */ 98static int job_dfcnt; /* count of datafiles in current user job */ 99static int lfd; /* lock file descriptor */ 100static int ofd; /* output filter file descriptor */ 101static int ofilter; /* id of output filter, if any */ 102static int tfd = -1; /* output filter temp file output */ 103static int pfd; /* prstatic inter file descriptor */ 104static int pid; /* pid of lpd process */ 105static int prchild; /* id of pr process */ 106static char title[80]; /* ``pr'' title */ 107static char locale[80]; /* ``pr'' locale */ 108 109/* these two are set from pp->daemon_user, but only if they are needed */ 110static char *daemon_uname; /* set from pwd->pw_name */ 111static int daemon_defgid; 112 113static char class[32]; /* classification field */ 114static char origin_host[MAXHOSTNAMELEN]; /* user's host machine */ 115 /* indentation size in static characters */ 116static char indent[10] = "-i0"; 117static char jobname[100]; /* job or file name */ 118static char length[10] = "-l"; /* page length in lines */ 119static char logname[32]; /* user's login name */ 120static char pxlength[10] = "-y"; /* page length in pixels */ 121static char pxwidth[10] = "-x"; /* page width in pixels */ 122/* tempstderr is the filename used to catch stderr from exec-ing filters */ 123static char tempstderr[] = "errs.XXXXXXX"; 124static char width[10] = "-w"; /* page width in static characters */ 125#define TFILENAME "fltXXXXXX" 126static char tfile[] = TFILENAME; /* file name for filter output */ 127 128static void abortpr(int _signo); 129static void alarmhandler(int _signo); 130static void banner(struct printer *_pp, char *_name1, char *_name2); 131static int dofork(const struct printer *_pp, int _action); 132static int dropit(int _c); 133static int execfilter(struct printer *_pp, char *_f_cmd, char **_f_av, 134 int _infd, int _outfd); 135static void init(struct printer *_pp); 136static void openpr(const struct printer *_pp); 137static void opennet(const struct printer *_pp); 138static void opentty(const struct printer *_pp); 139static void openrem(const struct printer *pp); 140static int print(struct printer *_pp, int _format, char *_file); 141static int printit(struct printer *_pp, char *_file); 142static void pstatus(const struct printer *_pp, const char *_msg, ...) 143 __printflike(2, 3); 144static char response(const struct printer *_pp); 145static void scan_out(struct printer *_pp, int _scfd, char *_scsp, 146 int _dlm); 147static char *scnline(int _key, char *_p, int _c); 148static int sendfile(struct printer *_pp, int _type, char *_file, 149 char _format, int _copyreq); 150static int sendit(struct printer *_pp, char *_file); 151static void sendmail(struct printer *_pp, char *_userid, int _bombed); 152static void setty(const struct printer *_pp); 153 154void 155printjob(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 */ 251again: 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 355char fonts[4][50]; /* fonts for troff */ 356 357char 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 */ 368static int 369printit(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 560pass2: 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 */ 597static int 598print(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], retcode, stopped, wstatus; 606 struct stat stb; 607 608 if (lstat(file, &stb) < 0 || (fi = open(file, O_RDONLY)) < 0) { 609 syslog(LOG_INFO, "%s: unable to open %s ('%c' line)", 610 pp->printer, file, format); 611 return(ERROR); 612 } 613 /* 614 * Check to see if data file is a symbolic link. If so, it should 615 * still point to the same file or someone is trying to print 616 * something he shouldn't. 617 */ 618 if ((stb.st_mode & S_IFMT) == S_IFLNK && fstat(fi, &stb) == 0 && 619 (stb.st_dev != fdev || stb.st_ino != fino)) 620 return(ACCESS); 621 622 job_dfcnt++; /* increment datafile counter for this job */ 623 stopped = 0; /* output filter is not stopped */ 624 625 /* everything seems OK, start it up */ 626 if (!pp->no_formfeed && !pp->tof) { /* start on a fresh page */ 627 (void) write(ofd, pp->form_feed, strlen(pp->form_feed)); 628 pp->tof = 1; 629 } 630 if (pp->filters[LPF_INPUT] == NULL 631 && (format == 'f' || format == 'l' || format == 'o')) { 632 pp->tof = 0; 633 while ((n = read(fi, buf, BUFSIZ)) > 0) 634 if (write(ofd, buf, n) != n) { 635 (void) close(fi); 636 return(REPRINT); 637 } 638 (void) close(fi); 639 return(OK); 640 } 641 switch (format) { 642 case 'p': /* print file using 'pr' */ 643 if (pp->filters[LPF_INPUT] == NULL) { /* use output filter */ 644 prog = _PATH_PR; 645 i = 0; 646 av[i++] = "pr"; 647 av[i++] = width; 648 av[i++] = length; 649 av[i++] = "-h"; 650 av[i++] = *title ? title : " "; 651 av[i++] = "-L"; 652 av[i++] = *locale ? locale : "C"; 653 av[i++] = "-F"; 654 av[i] = 0; 655 fo = ofd; 656 goto start; 657 } 658 pipe(p); 659 if ((prchild = dofork(pp, DORETURN)) == 0) { /* child */ 660 dup2(fi, 0); /* file is stdin */ 661 dup2(p[1], 1); /* pipe is stdout */ 662 closelog(); 663 closeallfds(3); 664 execl(_PATH_PR, "pr", width, length, 665 "-h", *title ? title : " ", 666 "-L", *locale ? locale : "C", 667 "-F", (char *)0); 668 syslog(LOG_ERR, "cannot execl %s", _PATH_PR); 669 exit(2); 670 } 671 (void) close(p[1]); /* close output side */ 672 (void) close(fi); 673 if (prchild < 0) { 674 prchild = 0; 675 (void) close(p[0]); 676 return(ERROR); 677 } 678 fi = p[0]; /* use pipe for input */ 679 case 'f': /* print plain text file */ 680 prog = pp->filters[LPF_INPUT]; 681 av[1] = width; 682 av[2] = length; 683 av[3] = indent; 684 n = 4; 685 break; 686 case 'o': /* print postscript file */ 687 /* 688 * Treat this as a "plain file with control characters", and 689 * assume the standard LPF_INPUT filter will recognize that 690 * the data is postscript and know what to do with it. These 691 * 'o'-file requests could come from MacOS 10.1 systems. 692 * (later versions of MacOS 10 will explicitly use 'l') 693 * A postscript file can contain binary data, which is why 'l' 694 * is somewhat more appropriate than 'f'. 695 */ 696 /* FALLTHROUGH */ 697 case 'l': /* like 'f' but pass control characters */ 698 prog = pp->filters[LPF_INPUT]; 699 av[1] = "-c"; 700 av[2] = width; 701 av[3] = length; 702 av[4] = indent; 703 n = 5; 704 break; 705 case 'r': /* print a fortran text file */ 706 prog = pp->filters[LPF_FORTRAN]; 707 av[1] = width; 708 av[2] = length; 709 n = 3; 710 break; 711 case 't': /* print troff output */ 712 case 'n': /* print ditroff output */ 713 case 'd': /* print tex output */ 714 (void) unlink(".railmag"); 715 if ((fo = creat(".railmag", FILMOD)) < 0) { 716 syslog(LOG_ERR, "%s: cannot create .railmag", 717 pp->printer); 718 (void) unlink(".railmag"); 719 } else { 720 for (n = 0; n < 4; n++) { 721 if (fonts[n][0] != '/') 722 (void) write(fo, _PATH_VFONT, 723 sizeof(_PATH_VFONT) - 1); 724 (void) write(fo, fonts[n], strlen(fonts[n])); 725 (void) write(fo, "\n", 1); 726 } 727 (void) close(fo); 728 } 729 prog = (format == 't') ? pp->filters[LPF_TROFF] 730 : ((format == 'n') ? pp->filters[LPF_DITROFF] 731 : pp->filters[LPF_DVI]); 732 av[1] = pxwidth; 733 av[2] = pxlength; 734 n = 3; 735 break; 736 case 'c': /* print cifplot output */ 737 prog = pp->filters[LPF_CIFPLOT]; 738 av[1] = pxwidth; 739 av[2] = pxlength; 740 n = 3; 741 break; 742 case 'g': /* print plot(1G) output */ 743 prog = pp->filters[LPF_GRAPH]; 744 av[1] = pxwidth; 745 av[2] = pxlength; 746 n = 3; 747 break; 748 case 'v': /* print raster output */ 749 prog = pp->filters[LPF_RASTER]; 750 av[1] = pxwidth; 751 av[2] = pxlength; 752 n = 3; 753 break; 754 default: 755 (void) close(fi); 756 syslog(LOG_ERR, "%s: illegal format character '%c'", 757 pp->printer, format); 758 return(ERROR); 759 } 760 if (prog == NULL) { 761 (void) close(fi); 762 syslog(LOG_ERR, 763 "%s: no filter found in printcap for format character '%c'", 764 pp->printer, format); 765 return(ERROR); 766 } 767 if ((av[0] = strrchr(prog, '/')) != NULL) 768 av[0]++; 769 else 770 av[0] = prog; 771 av[n++] = "-n"; 772 av[n++] = logname; 773 av[n++] = "-h"; 774 av[n++] = origin_host; 775 av[n++] = pp->acct_file; 776 av[n] = 0; 777 fo = pfd; 778 if (ofilter > 0) { /* stop output filter */ 779 write(ofd, "\031\1", 2); 780 while ((pid = 781 wait3(&wstatus, WUNTRACED, 0)) > 0 && pid != ofilter) 782 ; 783 if (pid < 0) 784 syslog(LOG_WARNING, "%s: after stopping 'of', wait3() returned: %m", 785 pp->printer); 786 else if (!WIFSTOPPED(wstatus)) { 787 (void) close(fi); 788 syslog(LOG_WARNING, "%s: output filter died " 789 "(pid=%d retcode=%d termsig=%d)", 790 pp->printer, ofilter, WEXITSTATUS(wstatus), 791 WTERMSIG(wstatus)); 792 return(REPRINT); 793 } 794 stopped++; 795 } 796start: 797 if ((child = dofork(pp, DORETURN)) == 0) { /* child */ 798 dup2(fi, 0); 799 dup2(fo, 1); 800 /* setup stderr for the filter (child process) 801 * so it goes to our temporary errors file */ 802 n = open(tempstderr, O_WRONLY|O_TRUNC, 0664); 803 if (n >= 0) 804 dup2(n, 2); 805 closelog(); 806 closeallfds(3); 807 execv(prog, av); 808 syslog(LOG_ERR, "%s: cannot execv(%s): %m", pp->printer, 809 prog); 810 exit(2); 811 } 812 (void) close(fi); 813 if (child < 0) 814 retcode = 100; 815 else { 816 while ((pid = wait(&wstatus)) > 0 && pid != child) 817 ; 818 if (pid < 0) { 819 retcode = 100; 820 syslog(LOG_WARNING, "%s: after execv(%s), wait() returned: %m", 821 pp->printer, prog); 822 } else 823 retcode = WEXITSTATUS(wstatus); 824 } 825 child = 0; 826 prchild = 0; 827 if (stopped) { /* restart output filter */ 828 if (kill(ofilter, SIGCONT) < 0) { 829 syslog(LOG_ERR, "cannot restart output filter"); 830 exit(1); 831 } 832 } 833 pp->tof = 0; 834 835 /* Copy the filter's output to "lf" logfile */ 836 if ((fp = fopen(tempstderr, "r"))) { 837 while (fgets(buf, sizeof(buf), fp)) 838 fputs(buf, stderr); 839 fclose(fp); 840 } 841 842 if (!WIFEXITED(wstatus)) { 843 syslog(LOG_WARNING, "%s: filter '%c' terminated (termsig=%d)", 844 pp->printer, format, WTERMSIG(wstatus)); 845 return(ERROR); 846 } 847 switch (retcode) { 848 case 0: 849 pp->tof = 1; 850 return(OK); 851 case 1: 852 return(REPRINT); 853 case 2: 854 return(ERROR); 855 default: 856 syslog(LOG_WARNING, "%s: filter '%c' exited (retcode=%d)", 857 pp->printer, format, retcode); 858 return(FILTERERR); 859 } 860} 861 862/* 863 * Send the daemon control file (cf) and any data files. 864 * Return -1 if a non-recoverable error occured, 1 if a recoverable error and 865 * 0 if all is well. 866 */ 867static int 868sendit(struct printer *pp, char *file) 869{ 870 int dfcopies, err, i; 871 char *cp, last[BUFSIZ]; 872 873 /* 874 * open control file 875 */ 876 if ((cfp = fopen(file, "r")) == NULL) 877 return(OK); 878 879 /* initialize job-specific count of datafiles processed */ 880 job_dfcnt = 0; 881 882 /* 883 * read the control file for work to do 884 * 885 * file format -- first character in the line is a command 886 * rest of the line is the argument. 887 * commands of interest are: 888 * 889 * a-z -- "file name" name of file to print 890 * U -- "unlink" name of file to remove 891 * (after we print it. (Pass 2 only)). 892 */ 893 894 /* 895 * pass 1 896 */ 897 err = OK; 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 dfcopies = 1; 929 strcpy(last, line); 930 while ((i = getline(cfp)) != 0) { 931 if (strcmp(last, line) != 0) 932 break; 933 dfcopies++; 934 } 935 switch (sendfile(pp, '\3', last+1, *last, dfcopies)) { 936 case OK: 937 if (i) 938 goto again; 939 break; 940 case REPRINT: 941 (void) fclose(cfp); 942 return(REPRINT); 943 case ACCESS: 944 sendmail(pp, logname, ACCESS); 945 case ERROR: 946 err = ERROR; 947 } 948 break; 949 } 950 } 951 if (err == OK && sendfile(pp, '\2', file, '\0', 1) > 0) { 952 (void) fclose(cfp); 953 return(REPRINT); 954 } 955 /* 956 * pass 2 957 */ 958 fseek(cfp, 0L, 0); 959 while (getline(cfp)) 960 if (line[0] == 'U' && !strchr(line+1, '/')) 961 (void) unlink(line+1); 962 /* 963 * clean-up in case another control file exists 964 */ 965 (void) fclose(cfp); 966 (void) unlink(file); 967 return(err); 968} 969 970/* 971 * Send a data file to the remote machine and spool it. 972 * Return positive if we should try resending. 973 */ 974static int 975sendfile(struct printer *pp, int type, char *file, char format, int copyreq) 976{ 977 int i, amt; 978 struct stat stb; 979 char *av[15], *filtcmd; 980 char buf[BUFSIZ], opt_c[4], opt_h[4], opt_n[4]; 981 int copycnt, filtstat, narg, resp, sfd, sfres, sizerr, statrc; 982 983 statrc = lstat(file, &stb); 984 if (statrc < 0) { 985 syslog(LOG_ERR, "%s: error from lstat(%s): %m", 986 pp->printer, file); 987 return (ERROR); 988 } 989 sfd = open(file, O_RDONLY); 990 if (sfd < 0) { 991 syslog(LOG_ERR, "%s: error from open(%s,O_RDONLY): %m", 992 pp->printer, file); 993 return (ERROR); 994 } 995 /* 996 * Check to see if data file is a symbolic link. If so, it should 997 * still point to the same file or someone is trying to print something 998 * he shouldn't. 999 */ 1000 if ((stb.st_mode & S_IFMT) == S_IFLNK && fstat(sfd, &stb) == 0 && 1001 (stb.st_dev != fdev || stb.st_ino != fino)) { 1002 close(sfd); 1003 return (ACCESS); 1004 } 1005 1006 /* Everything seems OK for reading the file, now to send it */ 1007 filtcmd = NULL; 1008 sizerr = 0; 1009 tfd = -1; 1010 if (type == '\3') { 1011 /* 1012 * Type == 3 means this is a datafile, not a control file. 1013 * Increment the counter of data-files in this job, and 1014 * then check for input or output filters (which are only 1015 * applied to datafiles, not control files). 1016 */ 1017 job_dfcnt++; 1018 1019 /* 1020 * Note that here we are filtering datafiles, one at a time, 1021 * as they are sent to the remote machine. Here, the *only* 1022 * difference between an input filter (`if=') and an output 1023 * filter (`of=') is the argument list that the filter is 1024 * started up with. Here, the output filter is executed 1025 * for each individual file as it is sent. This is not the 1026 * same as local print queues, where the output filter is 1027 * started up once, and then all jobs are passed thru that 1028 * single invocation of the output filter. 1029 * 1030 * Also note that a queue for a remote-machine can have an 1031 * input filter or an output filter, but not both. 1032 */ 1033 if (pp->filters[LPF_INPUT]) { 1034 filtcmd = pp->filters[LPF_INPUT]; 1035 av[0] = filtcmd; 1036 narg = 0; 1037 strcpy(opt_c, "-c"); 1038 strcpy(opt_h, "-h"); 1039 strcpy(opt_n, "-n"); 1040 if (format == 'l') 1041 av[++narg] = opt_c; 1042 av[++narg] = width; 1043 av[++narg] = length; 1044 av[++narg] = indent; 1045 av[++narg] = opt_n; 1046 av[++narg] = logname; 1047 av[++narg] = opt_h; 1048 av[++narg] = origin_host; 1049 av[++narg] = pp->acct_file; 1050 av[++narg] = NULL; 1051 } else if (pp->filters[LPF_OUTPUT]) { 1052 filtcmd = pp->filters[LPF_OUTPUT]; 1053 av[0] = filtcmd; 1054 narg = 0; 1055 av[++narg] = width; 1056 av[++narg] = length; 1057 av[++narg] = NULL; 1058 } 1059 } 1060 if (filtcmd) { 1061 /* 1062 * If there is an input or output filter, we have to run 1063 * the datafile thru that filter and store the result as 1064 * a temporary spool file, because the protocol requires 1065 * that we send the remote host the file-size before we 1066 * start to send any of the data. 1067 */ 1068 strcpy(tfile, TFILENAME); 1069 tfd = mkstemp(tfile); 1070 if (tfd == -1) { 1071 syslog(LOG_ERR, "%s: mkstemp(%s): %m", pp->printer, 1072 TFILENAME); 1073 sfres = ERROR; 1074 goto return_sfres; 1075 } 1076 filtstat = execfilter(pp, filtcmd, av, sfd, tfd); 1077 1078 /* process the return-code from the filter */ 1079 switch (filtstat) { 1080 case 0: 1081 break; 1082 case 1: 1083 sfres = REPRINT; 1084 goto return_sfres; 1085 case 2: 1086 sfres = ERROR; 1087 goto return_sfres; 1088 default: 1089 syslog(LOG_WARNING, 1090 "%s: filter '%c' exited (retcode=%d)", 1091 pp->printer, format, filtstat); 1092 sfres = FILTERERR; 1093 goto return_sfres; 1094 } 1095 statrc = fstat(tfd, &stb); /* to find size of tfile */ 1096 if (statrc < 0) { 1097 syslog(LOG_ERR, 1098 "%s: error processing 'if', fstat(%s): %m", 1099 pp->printer, tfile); 1100 sfres = ERROR; 1101 goto return_sfres; 1102 } 1103 close(sfd); 1104 sfd = tfd; 1105 lseek(sfd, 0, SEEK_SET); 1106 } 1107 1108 copycnt = 0; 1109sendagain: 1110 copycnt++; 1111 1112 if (copycnt < 2) 1113 (void) sprintf(buf, "%c%qd %s\n", type, stb.st_size, file); 1114 else 1115 (void) sprintf(buf, "%c%qd %s_c%d\n", type, stb.st_size, 1116 file, copycnt); 1117 amt = strlen(buf); 1118 for (i = 0; ; i++) { 1119 if (write(pfd, buf, amt) != amt || 1120 (resp = response(pp)) < 0 || resp == '\1') { 1121 sfres = REPRINT; 1122 goto return_sfres; 1123 } else if (resp == '\0') 1124 break; 1125 if (i == 0) 1126 pstatus(pp, 1127 "no space on remote; waiting for queue to drain"); 1128 if (i == 10) 1129 syslog(LOG_ALERT, "%s: can't send to %s; queue full", 1130 pp->printer, pp->remote_host); 1131 sleep(5 * 60); 1132 } 1133 if (i) 1134 pstatus(pp, "sending to %s", pp->remote_host); 1135 /* 1136 * XXX - we should change trstat_init()/trstat_write() to include 1137 * the copycnt in the statistics record it may write. 1138 */ 1139 if (type == '\3') 1140 trstat_init(pp, file, job_dfcnt); 1141 for (i = 0; i < stb.st_size; i += BUFSIZ) { 1142 amt = BUFSIZ; 1143 if (i + amt > stb.st_size) 1144 amt = stb.st_size - i; 1145 if (sizerr == 0 && read(sfd, buf, amt) != amt) 1146 sizerr = 1; 1147 if (write(pfd, buf, amt) != amt) { 1148 sfres = REPRINT; 1149 goto return_sfres; 1150 } 1151 } 1152 1153 if (sizerr) { 1154 syslog(LOG_INFO, "%s: %s: changed size", pp->printer, file); 1155 /* tell recvjob to ignore this file */ 1156 (void) write(pfd, "\1", 1); 1157 sfres = ERROR; 1158 goto return_sfres; 1159 } 1160 if (write(pfd, "", 1) != 1 || response(pp)) { 1161 sfres = REPRINT; 1162 goto return_sfres; 1163 } 1164 if (type == '\3') { 1165 trstat_write(pp, TR_SENDING, stb.st_size, logname, 1166 pp->remote_host, origin_host); 1167 /* 1168 * Usually we only need to send one copy of a datafile, 1169 * because the control-file will simply print the same 1170 * file multiple times. However, some printers ignore 1171 * the control file, and simply print each data file as 1172 * it arrives. For such "remote hosts", we need to 1173 * transfer the same data file multiple times. Such a 1174 * a host is indicated by adding 'rc' to the printcap 1175 * entry. 1176 * XXX - Right now this ONLY works for remote hosts which 1177 * do ignore the name of the data file, because 1178 * this sends the file multiple times with slight 1179 * changes to the filename. To do this right would 1180 * require that we also rewrite the control file 1181 * to match those filenames. 1182 */ 1183 if (pp->resend_copies && (copycnt < copyreq)) { 1184 lseek(sfd, 0, SEEK_SET); 1185 goto sendagain; 1186 } 1187 } 1188 sfres = OK; 1189 1190return_sfres: 1191 (void)close(sfd); 1192 if (tfd != -1) { 1193 /* 1194 * If tfd is set, then it is the same value as sfd, and 1195 * therefore it is already closed at this point. All 1196 * we need to do is remove the temporary file. 1197 */ 1198 tfd = -1; 1199 unlink(tfile); 1200 } 1201 return (sfres); 1202} 1203 1204/* 1205 * This routine is called to execute one of the filters as was 1206 * specified in a printcap entry. While the child-process will read 1207 * all of 'infd', it is up to the caller to close that file descriptor 1208 * in the parent process. 1209 */ 1210static int 1211execfilter(struct printer *pp, char *f_cmd, char *f_av[], int infd, int outfd) 1212{ 1213 int errfd, fpid, retcode, wpid, wstatus; 1214 FILE *errfp; 1215 char buf[BUFSIZ], *slash; 1216 1217 fpid = dofork(pp, DORETURN); 1218 if (fpid != 0) { 1219 /* 1220 * This is the parent process, which just waits for the child 1221 * to complete and then returns the result. Note that it is 1222 * the child process which reads the input stream. 1223 */ 1224 if (fpid < 0) 1225 retcode = 100; 1226 else { 1227 while ((wpid = wait(&wstatus)) > 0 && 1228 wpid != fpid) 1229 ; 1230 if (wpid < 0) { 1231 retcode = 100; 1232 syslog(LOG_WARNING, 1233 "%s: after execv(%s), wait() returned: %m", 1234 pp->printer, f_cmd); 1235 } else 1236 retcode = WEXITSTATUS(wstatus); 1237 } 1238 1239 /* 1240 * Copy everything the filter wrote to stderr from our 1241 * temporary errors file to the "lf=" logfile. 1242 */ 1243 errfp = fopen(tempstderr, "r"); 1244 if (errfp) { 1245 while (fgets(buf, sizeof(buf), errfp)) 1246 fputs(buf, stderr); 1247 fclose(errfp); 1248 } 1249 1250 return (retcode); 1251 } 1252 1253 /* 1254 * This is the child process, which is the one that executes the 1255 * given filter. 1256 */ 1257 /* 1258 * If the first parameter has any slashes in it, then change it 1259 * to point to the first character after the last slash. 1260 */ 1261 slash = strrchr(f_av[0], '/'); 1262 if (slash != NULL) 1263 f_av[0] = slash + 1; 1264 /* 1265 * XXX - in the future, this should setup an explicit list of 1266 * environment variables and use execve()! 1267 */ 1268 1269 /* 1270 * Setup stdin, stdout, and stderr as we want them when the filter 1271 * is running. Stderr is setup so it points to a temporary errors 1272 * file, and the parent process will copy that temporary file to 1273 * the real logfile after the filter completes. 1274 */ 1275 dup2(infd, 0); 1276 dup2(outfd, 1); 1277 errfd = open(tempstderr, O_WRONLY|O_TRUNC, 0664); 1278 if (errfd >= 0) 1279 dup2(errfd, 2); 1280 closelog(); 1281 closeallfds(3); 1282 execv(f_cmd, f_av); 1283 syslog(LOG_ERR, "%s: cannot execv(%s): %m", pp->printer, f_cmd); 1284 exit(2); 1285 /* NOTREACHED */ 1286} 1287 1288/* 1289 * Check to make sure there have been no errors and that both programs 1290 * are in sync with eachother. 1291 * Return non-zero if the connection was lost. 1292 */ 1293static char 1294response(const struct printer *pp) 1295{ 1296 char resp; 1297 1298 if (read(pfd, &resp, 1) != 1) { 1299 syslog(LOG_INFO, "%s: lost connection", pp->printer); 1300 return(-1); 1301 } 1302 return(resp); 1303} 1304 1305/* 1306 * Banner printing stuff 1307 */ 1308static void 1309banner(struct printer *pp, char *name1, char *name2) 1310{ 1311 time_t tvec; 1312 1313 time(&tvec); 1314 if (!pp->no_formfeed && !pp->tof) 1315 (void) write(ofd, pp->form_feed, strlen(pp->form_feed)); 1316 if (pp->short_banner) { /* short banner only */ 1317 if (class[0]) { 1318 (void) write(ofd, class, strlen(class)); 1319 (void) write(ofd, ":", 1); 1320 } 1321 (void) write(ofd, name1, strlen(name1)); 1322 (void) write(ofd, " Job: ", 7); 1323 (void) write(ofd, name2, strlen(name2)); 1324 (void) write(ofd, " Date: ", 8); 1325 (void) write(ofd, ctime(&tvec), 24); 1326 (void) write(ofd, "\n", 1); 1327 } else { /* normal banner */ 1328 (void) write(ofd, "\n\n\n", 3); 1329 scan_out(pp, ofd, name1, '\0'); 1330 (void) write(ofd, "\n\n", 2); 1331 scan_out(pp, ofd, name2, '\0'); 1332 if (class[0]) { 1333 (void) write(ofd,"\n\n\n",3); 1334 scan_out(pp, ofd, class, '\0'); 1335 } 1336 (void) write(ofd, "\n\n\n\n\t\t\t\t\tJob: ", 15); 1337 (void) write(ofd, name2, strlen(name2)); 1338 (void) write(ofd, "\n\t\t\t\t\tDate: ", 12); 1339 (void) write(ofd, ctime(&tvec), 24); 1340 (void) write(ofd, "\n", 1); 1341 } 1342 if (!pp->no_formfeed) 1343 (void) write(ofd, pp->form_feed, strlen(pp->form_feed)); 1344 pp->tof = 1; 1345} 1346 1347static char * 1348scnline(int key, char *p, int c) 1349{ 1350 register int scnwidth; 1351 1352 for (scnwidth = WIDTH; --scnwidth;) { 1353 key <<= 1; 1354 *p++ = key & 0200 ? c : BACKGND; 1355 } 1356 return (p); 1357} 1358 1359#define TRC(q) (((q)-' ')&0177) 1360 1361static void 1362scan_out(struct printer *pp, int scfd, char *scsp, int dlm) 1363{ 1364 register char *strp; 1365 register int nchrs, j; 1366 char outbuf[LINELEN+1], *sp, c, cc; 1367 int d, scnhgt; 1368 1369 for (scnhgt = 0; scnhgt++ < HEIGHT+DROP; ) { 1370 strp = &outbuf[0]; 1371 sp = scsp; 1372 for (nchrs = 0; ; ) { 1373 d = dropit(c = TRC(cc = *sp++)); 1374 if ((!d && scnhgt > HEIGHT) || (scnhgt <= DROP && d)) 1375 for (j = WIDTH; --j;) 1376 *strp++ = BACKGND; 1377 else 1378 strp = scnline(scnkey[(int)c][scnhgt-1-d], strp, cc); 1379 if (*sp == dlm || *sp == '\0' || 1380 nchrs++ >= pp->page_width/(WIDTH+1)-1) 1381 break; 1382 *strp++ = BACKGND; 1383 *strp++ = BACKGND; 1384 } 1385 while (*--strp == BACKGND && strp >= outbuf) 1386 ; 1387 strp++; 1388 *strp++ = '\n'; 1389 (void) write(scfd, outbuf, strp-outbuf); 1390 } 1391} 1392 1393static int 1394dropit(int c) 1395{ 1396 switch(c) { 1397 1398 case TRC('_'): 1399 case TRC(';'): 1400 case TRC(','): 1401 case TRC('g'): 1402 case TRC('j'): 1403 case TRC('p'): 1404 case TRC('q'): 1405 case TRC('y'): 1406 return (DROP); 1407 1408 default: 1409 return (0); 1410 } 1411} 1412 1413/* 1414 * sendmail --- 1415 * tell people about job completion 1416 */ 1417static void 1418sendmail(struct printer *pp, char *userid, int bombed) 1419{ 1420 register int i; 1421 int p[2], s; 1422 register const char *cp; 1423 struct stat stb; 1424 FILE *fp; 1425 1426 pipe(p); 1427 if ((s = dofork(pp, DORETURN)) == 0) { /* child */ 1428 dup2(p[0], 0); 1429 closelog(); 1430 closeallfds(3); 1431 if ((cp = strrchr(_PATH_SENDMAIL, '/')) != NULL) 1432 cp++; 1433 else 1434 cp = _PATH_SENDMAIL; 1435 execl(_PATH_SENDMAIL, cp, "-t", (char *)0); 1436 _exit(0); 1437 } else if (s > 0) { /* parent */ 1438 dup2(p[1], 1); 1439 printf("To: %s@%s\n", userid, origin_host); 1440 printf("Subject: %s printer job \"%s\"\n", pp->printer, 1441 *jobname ? jobname : "<unknown>"); 1442 printf("Reply-To: root@%s\n\n", local_host); 1443 printf("Your printer job "); 1444 if (*jobname) 1445 printf("(%s) ", jobname); 1446 1447 switch (bombed) { 1448 case OK: 1449 cp = "OK"; 1450 printf("\ncompleted successfully\n"); 1451 break; 1452 default: 1453 case FATALERR: 1454 cp = "FATALERR"; 1455 printf("\ncould not be printed\n"); 1456 break; 1457 case NOACCT: 1458 cp = "NOACCT"; 1459 printf("\ncould not be printed without an account on %s\n", 1460 local_host); 1461 break; 1462 case FILTERERR: 1463 cp = "FILTERERR"; 1464 if (stat(tempstderr, &stb) < 0 || stb.st_size == 0 1465 || (fp = fopen(tempstderr, "r")) == NULL) { 1466 printf("\nhad some errors and may not have printed\n"); 1467 break; 1468 } 1469 printf("\nhad the following errors and may not have printed:\n"); 1470 while ((i = getc(fp)) != EOF) 1471 putchar(i); 1472 (void) fclose(fp); 1473 break; 1474 case ACCESS: 1475 cp = "ACCESS"; 1476 printf("\nwas not printed because it was not linked to the original file\n"); 1477 } 1478 fflush(stdout); 1479 (void) close(1); 1480 } else { 1481 syslog(LOG_WARNING, "unable to send mail to %s: %m", userid); 1482 return; 1483 } 1484 (void) close(p[0]); 1485 (void) close(p[1]); 1486 wait(NULL); 1487 syslog(LOG_INFO, "mail sent to user %s about job %s on printer %s (%s)", 1488 userid, *jobname ? jobname : "<unknown>", pp->printer, cp); 1489} 1490 1491/* 1492 * dofork - fork with retries on failure 1493 */ 1494static int 1495dofork(const struct printer *pp, int action) 1496{ 1497 int i, fail, forkpid; 1498 struct passwd *pwd; 1499 1500 forkpid = -1; 1501 if (daemon_uname == NULL) { 1502 pwd = getpwuid(pp->daemon_user); 1503 if (pwd == NULL) { 1504 syslog(LOG_ERR, "%s: Can't lookup default daemon uid (%ld) in password file", 1505 pp->printer, pp->daemon_user); 1506 goto error_ret; 1507 } 1508 daemon_uname = strdup(pwd->pw_name); 1509 daemon_defgid = pwd->pw_gid; 1510 } 1511 1512 for (i = 0; i < 20; i++) { 1513 forkpid = fork(); 1514 if (forkpid < 0) { 1515 sleep((unsigned)(i*i)); 1516 continue; 1517 } 1518 /* 1519 * Child should run as daemon instead of root 1520 */ 1521 if (forkpid == 0) { 1522 errno = 0; 1523 fail = initgroups(daemon_uname, daemon_defgid); 1524 if (fail) { 1525 syslog(LOG_ERR, "%s: initgroups(%s,%u): %m", 1526 pp->printer, daemon_uname, daemon_defgid); 1527 break; 1528 } 1529 fail = setgid(daemon_defgid); 1530 if (fail) { 1531 syslog(LOG_ERR, "%s: setgid(%u): %m", 1532 pp->printer, daemon_defgid); 1533 break; 1534 } 1535 fail = setuid(pp->daemon_user); 1536 if (fail) { 1537 syslog(LOG_ERR, "%s: setuid(%ld): %m", 1538 pp->printer, pp->daemon_user); 1539 break; 1540 } 1541 } 1542 return forkpid; 1543 } 1544 1545 /* 1546 * An error occurred. If the error is in the child process, then 1547 * this routine MUST always exit(). DORETURN only effects how 1548 * errors should be handled in the parent process. 1549 */ 1550error_ret: 1551 if (forkpid == 0) { 1552 syslog(LOG_ERR, "%s: dofork(): aborting child process...", 1553 pp->printer); 1554 exit(1); 1555 } 1556 syslog(LOG_ERR, "%s: dofork(): failure in fork", pp->printer); 1557 1558 sleep(1); /* throttle errors, as a safety measure */ 1559 switch (action) { 1560 case DORETURN: 1561 return -1; 1562 default: 1563 syslog(LOG_ERR, "bad action (%d) to dofork", action); 1564 /* FALLTHROUGH */ 1565 case DOABORT: 1566 exit(1); 1567 } 1568 /*NOTREACHED*/ 1569} 1570 1571/* 1572 * Kill child processes to abort current job. 1573 */ 1574static void 1575abortpr(int signo __unused) 1576{ 1577 1578 (void) unlink(tempstderr); 1579 kill(0, SIGINT); 1580 if (ofilter > 0) 1581 kill(ofilter, SIGCONT); 1582 while (wait(NULL) > 0) 1583 ; 1584 if (ofilter > 0 && tfd != -1) 1585 unlink(tfile); 1586 exit(0); 1587} 1588 1589static void 1590init(struct printer *pp) 1591{ 1592 char *s; 1593 1594 sprintf(&width[2], "%ld", pp->page_width); 1595 sprintf(&length[2], "%ld", pp->page_length); 1596 sprintf(&pxwidth[2], "%ld", pp->page_pwidth); 1597 sprintf(&pxlength[2], "%ld", pp->page_plength); 1598 if ((s = checkremote(pp)) != 0) { 1599 syslog(LOG_WARNING, "%s", s); 1600 free(s); 1601 } 1602} 1603 1604void 1605startprinting(const char *printer) 1606{ 1607 struct printer myprinter, *pp = &myprinter; 1608 int status; 1609 1610 init_printer(pp); 1611 status = getprintcap(printer, pp); 1612 switch(status) { 1613 case PCAPERR_OSERR: 1614 syslog(LOG_ERR, "can't open printer description file: %m"); 1615 exit(1); 1616 case PCAPERR_NOTFOUND: 1617 syslog(LOG_ERR, "unknown printer: %s", printer); 1618 exit(1); 1619 case PCAPERR_TCLOOP: 1620 fatal(pp, "potential reference loop detected in printcap file"); 1621 default: 1622 break; 1623 } 1624 printjob(pp); 1625} 1626 1627/* 1628 * Acquire line printer or remote connection. 1629 */ 1630static void 1631openpr(const struct printer *pp) 1632{ 1633 int p[2]; 1634 char *cp; 1635 1636 if (pp->remote) { 1637 openrem(pp); 1638 /* 1639 * Lpd does support the setting of 'of=' filters for 1640 * jobs going to remote machines, but that does not 1641 * have the same meaning as 'of=' does when handling 1642 * local print queues. For remote machines, all 'of=' 1643 * filter processing is handled in sendfile(), and that 1644 * does not use these global "output filter" variables. 1645 */ 1646 ofd = -1; 1647 ofilter = 0; 1648 return; 1649 } else if (*pp->lp) { 1650 if ((cp = strchr(pp->lp, '@')) != NULL) 1651 opennet(pp); 1652 else 1653 opentty(pp); 1654 } else { 1655 syslog(LOG_ERR, "%s: no line printer device or host name", 1656 pp->printer); 1657 exit(1); 1658 } 1659 1660 /* 1661 * Start up an output filter, if needed. 1662 */ 1663 if (pp->filters[LPF_OUTPUT] && !pp->filters[LPF_INPUT] && !ofilter) { 1664 pipe(p); 1665 if (pp->remote) { 1666 strcpy(tfile, TFILENAME); 1667 tfd = mkstemp(tfile); 1668 } 1669 if ((ofilter = dofork(pp, DOABORT)) == 0) { /* child */ 1670 dup2(p[0], 0); /* pipe is std in */ 1671 /* tfile/printer is stdout */ 1672 dup2(pp->remote ? tfd : pfd, 1); 1673 closelog(); 1674 closeallfds(3); 1675 if ((cp = strrchr(pp->filters[LPF_OUTPUT], '/')) == NULL) 1676 cp = pp->filters[LPF_OUTPUT]; 1677 else 1678 cp++; 1679 execl(pp->filters[LPF_OUTPUT], cp, width, length, 1680 (char *)0); 1681 syslog(LOG_ERR, "%s: %s: %m", pp->printer, 1682 pp->filters[LPF_OUTPUT]); 1683 exit(1); 1684 } 1685 (void) close(p[0]); /* close input side */ 1686 ofd = p[1]; /* use pipe for output */ 1687 } else { 1688 ofd = pfd; 1689 ofilter = 0; 1690 } 1691} 1692 1693/* 1694 * Printer connected directly to the network 1695 * or to a terminal server on the net 1696 */ 1697static void 1698opennet(const struct printer *pp) 1699{ 1700 register int i; 1701 int resp; 1702 u_long port; 1703 char *ep; 1704 void (*savealrm)(int); 1705 1706 port = strtoul(pp->lp, &ep, 0); 1707 if (*ep != '@' || port > 65535) { 1708 syslog(LOG_ERR, "%s: bad port number: %s", pp->printer, 1709 pp->lp); 1710 exit(1); 1711 } 1712 ep++; 1713 1714 for (i = 1; ; i = i < 256 ? i << 1 : i) { 1715 resp = -1; 1716 savealrm = signal(SIGALRM, alarmhandler); 1717 alarm(pp->conn_timeout); 1718 pfd = getport(pp, ep, port); 1719 alarm(0); 1720 (void)signal(SIGALRM, savealrm); 1721 if (pfd < 0 && errno == ECONNREFUSED) 1722 resp = 1; 1723 else if (pfd >= 0) { 1724 /* 1725 * need to delay a bit for rs232 lines 1726 * to stabilize in case printer is 1727 * connected via a terminal server 1728 */ 1729 delay(500); 1730 break; 1731 } 1732 if (i == 1) { 1733 if (resp < 0) 1734 pstatus(pp, "waiting for %s to come up", 1735 pp->lp); 1736 else 1737 pstatus(pp, 1738 "waiting for access to printer on %s", 1739 pp->lp); 1740 } 1741 sleep(i); 1742 } 1743 pstatus(pp, "sending to %s port %lu", ep, port); 1744} 1745 1746/* 1747 * Printer is connected to an RS232 port on this host 1748 */ 1749static void 1750opentty(const struct printer *pp) 1751{ 1752 register int i; 1753 1754 for (i = 1; ; i = i < 32 ? i << 1 : i) { 1755 pfd = open(pp->lp, pp->rw ? O_RDWR : O_WRONLY); 1756 if (pfd >= 0) { 1757 delay(500); 1758 break; 1759 } 1760 if (errno == ENOENT) { 1761 syslog(LOG_ERR, "%s: %m", pp->lp); 1762 exit(1); 1763 } 1764 if (i == 1) 1765 pstatus(pp, 1766 "waiting for %s to become ready (offline?)", 1767 pp->printer); 1768 sleep(i); 1769 } 1770 if (isatty(pfd)) 1771 setty(pp); 1772 pstatus(pp, "%s is ready and printing", pp->printer); 1773} 1774 1775/* 1776 * Printer is on a remote host 1777 */ 1778static void 1779openrem(const struct printer *pp) 1780{ 1781 register int i; 1782 int resp; 1783 void (*savealrm)(int); 1784 1785 for (i = 1; ; i = i < 256 ? i << 1 : i) { 1786 resp = -1; 1787 savealrm = signal(SIGALRM, alarmhandler); 1788 alarm(pp->conn_timeout); 1789 pfd = getport(pp, pp->remote_host, 0); 1790 alarm(0); 1791 (void)signal(SIGALRM, savealrm); 1792 if (pfd >= 0) { 1793 if ((writel(pfd, "\2", pp->remote_queue, "\n", 1794 (char *)0) 1795 == 2 + strlen(pp->remote_queue)) 1796 && (resp = response(pp)) == 0) 1797 break; 1798 (void) close(pfd); 1799 } 1800 if (i == 1) { 1801 if (resp < 0) 1802 pstatus(pp, "waiting for %s to come up", 1803 pp->remote_host); 1804 else { 1805 pstatus(pp, 1806 "waiting for queue to be enabled on %s", 1807 pp->remote_host); 1808 i = 256; 1809 } 1810 } 1811 sleep(i); 1812 } 1813 pstatus(pp, "sending to %s", pp->remote_host); 1814} 1815 1816/* 1817 * setup tty lines. 1818 */ 1819static void 1820setty(const struct printer *pp) 1821{ 1822 struct termios ttybuf; 1823 1824 if (ioctl(pfd, TIOCEXCL, (char *)0) < 0) { 1825 syslog(LOG_ERR, "%s: ioctl(TIOCEXCL): %m", pp->printer); 1826 exit(1); 1827 } 1828 if (tcgetattr(pfd, &ttybuf) < 0) { 1829 syslog(LOG_ERR, "%s: tcgetattr: %m", pp->printer); 1830 exit(1); 1831 } 1832 if (pp->baud_rate > 0) 1833 cfsetspeed(&ttybuf, pp->baud_rate); 1834 if (pp->mode_set) { 1835 char *s = strdup(pp->mode_set), *tmp; 1836 1837 while ((tmp = strsep(&s, ",")) != NULL) { 1838 (void) msearch(tmp, &ttybuf); 1839 } 1840 } 1841 if (pp->mode_set != 0 || pp->baud_rate > 0) { 1842 if (tcsetattr(pfd, TCSAFLUSH, &ttybuf) == -1) { 1843 syslog(LOG_ERR, "%s: tcsetattr: %m", pp->printer); 1844 } 1845 } 1846} 1847 1848#include <stdarg.h> 1849 1850static void 1851pstatus(const struct printer *pp, const char *msg, ...) 1852{ 1853 int fd; 1854 char *buf; 1855 va_list ap; 1856 va_start(ap, msg); 1857 1858 umask(0); 1859 fd = open(pp->status_file, O_WRONLY|O_CREAT|O_EXLOCK, STAT_FILE_MODE); 1860 if (fd < 0) { 1861 syslog(LOG_ERR, "%s: %s: %m", pp->printer, pp->status_file); 1862 exit(1); 1863 } 1864 ftruncate(fd, 0); 1865 vasprintf(&buf, msg, ap); 1866 va_end(ap); 1867 writel(fd, buf, "\n", (char *)0); 1868 close(fd); 1869 free(buf); 1870} 1871 1872void 1873alarmhandler(int signo __unused) 1874{ 1875 /* the signal is ignored */ 1876 /* (the '__unused' is just to avoid a compile-time warning) */ 1877} 1878