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freebsd-nq/usr.sbin/lpr/runqueue/printjob.c
Garrett Wollman 4a1a0dbedb Mega lpd/lpd upgrade, part I: 
- Get rid of a lot of the static variables which were shared by
  many routines and programs in the suite.
- Create an abstract interface to the printcap database, so that
  other retrieval and iteration mechanisms could be developed
  (e.g., YP, Hesiod, or automatic retrieval from a trusted server).
- Give each capability a human-readable name in addition to the historic
  two-character one.
- Otherwise generally clean up a lot of dark corners.  Many still remain.
- When submitting jobs, use the official login name record (from getlogin())
  if there is one, rather than reverse-mapping the uid.

More to come...
1997-12-02 20:46:22 +00:00

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/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1983, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*
static char sccsid[] = "@(#)printjob.c 8.7 (Berkeley) 5/10/95";
*/
static const char rcsid[] =
"$Id$";
#endif /* not lint */
/*
* printjob -- print jobs in the queue.
*
* NOTE: the lock file is used to pass information to lpq and lprm.
* it does not need to be removed because file locks are dynamic.
*/
#include <sys/param.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <pwd.h>
#include <unistd.h>
#include <signal.h>
#include <syslog.h>
#include <fcntl.h>
#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <time.h>
#include "lp.h"
#include "lp.local.h"
#include "pathnames.h"
#include "extern.h"
#define DORETURN 0 /* absorb fork error */
#define DOABORT 1 /* abort if dofork fails */
/*
* Error tokens
*/
#define REPRINT -2
#define ERROR -1
#define OK 0
#define FATALERR 1
#define NOACCT 2
#define FILTERERR 3
#define ACCESS 4
static dev_t fdev; /* device of file pointed to by symlink */
static ino_t fino; /* inode of file pointed to by symlink */
static FILE *cfp; /* control file */
static int child; /* id of any filters */
static int lfd; /* lock file descriptor */
static int ofd; /* output filter file descriptor */
static int ofilter; /* id of output filter, if any */
static int tfd = -1; /* output filter temp file output */
static int pfd; /* prstatic inter file descriptor */
static int pid; /* pid of lpd process */
static int prchild; /* id of pr process */
static char title[80]; /* ``pr'' title */
static char class[32]; /* classification field */
static char fromhost[32]; /* user's host machine */
/* indentation size in static characters */
static char indent[10] = "-i0";
static char jobname[100]; /* job or file name */
static char length[10] = "-l"; /* page length in lines */
static char logname[32]; /* user's login name */
static char pxlength[10] = "-y"; /* page length in pixels */
static char pxwidth[10] = "-x"; /* page width in pixels */
static char tempfile[] = "errsXXXXXX"; /* file name for filter errors */
static char width[10] = "-w"; /* page width in static characters */
#define TFILENAME "fltXXXXXX"
static char tfile[] = TFILENAME; /* file name for filter output */
static void abortpr __P((int));
static void alarmhandler __P((int));
static void banner __P((struct printer *pp, char *name1, char *name2));
static int dofork __P((const struct printer *pp, int action));
static int dropit __P((int));
static void init __P((struct printer *pp));
static void openpr __P((const struct printer *pp));
static void opennet __P((const struct printer *pp));
static void opentty __P((const struct printer *pp));
static void openrem __P((const struct printer *pp));
static int print __P((struct printer *pp, int format, char *file));
static int printit __P((struct printer *pp, char *file));
static void pstatus __P((const struct printer *, const char *, ...));
static char response __P((const struct printer *pp));
static void scan_out __P((struct printer *pp, int scfd, char *scsp,
int dlm));
static char *scnline __P((int, char *, int));
static int sendfile __P((struct printer *pp, int type, char *file,
int format));
static int sendit __P((struct printer *pp, char *file));
static void sendmail __P((struct printer *pp, char *user, int bombed));
static void setty __P((const struct printer *pp));
void msearch __P((char *, struct termios *));
void
printjob(pp)
struct printer *pp;
{
struct stat stb;
register struct queue *q, **qp;
struct queue **queue;
register int i, nitems;
off_t pidoff;
int errcnt, count = 0;
init(pp); /* set up capabilities */
(void) write(1, "", 1); /* ack that daemon is started */
(void) close(2); /* set up log file */
if (open(pp->log_file, O_WRONLY|O_APPEND, LOG_FILE_MODE) < 0) {
syslog(LOG_ERR, "%s: %m", pp->log_file);
(void) open(_PATH_DEVNULL, O_WRONLY);
}
setgid(getegid());
pid = getpid(); /* for use with lprm */
setpgrp(0, pid);
signal(SIGHUP, abortpr);
signal(SIGINT, abortpr);
signal(SIGQUIT, abortpr);
signal(SIGTERM, abortpr);
(void) mktemp(tempfile);
/*
* uses short form file names
*/
if (chdir(pp->spool_dir) < 0) {
syslog(LOG_ERR, "%s: %m", pp->spool_dir);
exit(1);
}
if (stat(pp->lock_file, &stb) == 0 && (stb.st_mode & LFM_PRINT_DIS))
exit(0); /* printing disabled */
lfd = open(pp->lock_file, O_WRONLY|O_CREAT|O_EXLOCK|O_NONBLOCK,
LOCK_FILE_MODE);
if (lfd < 0) {
if (errno == EWOULDBLOCK) /* active daemon present */
exit(0);
syslog(LOG_ERR, "%s: %s: %m", pp->printer, pp->lock_file);
exit(1);
}
/* turn off non-blocking mode (was turned on for lock effects only) */
if (fcntl(lfd, F_SETFL, 0) < 0) {
syslog(LOG_ERR, "%s: %s: %m", pp->printer, pp->lock_file);
exit(1);
}
ftruncate(lfd, 0);
/*
* write process id for others to know
*/
sprintf(line, "%u\n", pid);
pidoff = i = strlen(line);
if (write(lfd, line, i) != i) {
syslog(LOG_ERR, "%s: %s: %m", pp->printer, pp->lock_file);
exit(1);
}
/*
* search the spool directory for work and sort by queue order.
*/
if ((nitems = getq(pp, &queue)) < 0) {
syslog(LOG_ERR, "%s: can't scan %s", pp->printer,
pp->spool_dir);
exit(1);
}
if (nitems == 0) /* no work to do */
exit(0);
if (stb.st_mode & LFM_RESET_QUE) { /* reset queue flag */
if (fchmod(lfd, stb.st_mode & ~LFM_RESET_QUE) < 0)
syslog(LOG_ERR, "%s: %s: %m", pp->printer,
pp->lock_file);
}
openpr(pp); /* open printer or remote */
again:
/*
* we found something to do now do it --
* write the name of the current control file into the lock file
* so the spool queue program can tell what we're working on
*/
for (qp = queue; nitems--; free((char *) q)) {
q = *qp++;
if (stat(q->q_name, &stb) < 0)
continue;
errcnt = 0;
restart:
(void) lseek(lfd, pidoff, 0);
(void) snprintf(line, sizeof(line), "%s\n", q->q_name);
i = strlen(line);
if (write(lfd, line, i) != i)
syslog(LOG_ERR, "%s: %s: %m", pp->printer,
pp->lock_file);
if (!pp->remote)
i = printit(pp, q->q_name);
else
i = sendit(pp, q->q_name);
/*
* Check to see if we are supposed to stop printing or
* if we are to rebuild the queue.
*/
if (fstat(lfd, &stb) == 0) {
/* stop printing before starting next job? */
if (stb.st_mode & LFM_PRINT_DIS)
goto done;
/* rebuild queue (after lpc topq) */
if (stb.st_mode & LFM_RESET_QUE) {
for (free(q); nitems--; free(q))
q = *qp++;
if (fchmod(lfd, stb.st_mode & ~LFM_RESET_QUE)
< 0)
syslog(LOG_WARNING, "%s: %s: %m",
pp->printer, pp->lock_file);
break;
}
}
if (i == OK) /* file ok and printed */
count++;
else if (i == REPRINT && ++errcnt < 5) {
/* try reprinting the job */
syslog(LOG_INFO, "restarting %s", pp->printer);
if (ofilter > 0) {
kill(ofilter, SIGCONT); /* to be sure */
(void) close(ofd);
while ((i = wait(NULL)) > 0 && i != ofilter)
;
ofilter = 0;
}
(void) close(pfd); /* close printer */
if (ftruncate(lfd, pidoff) < 0)
syslog(LOG_WARNING, "%s: %s: %m",
pp->printer, pp->lock_file);
openpr(pp); /* try to reopen printer */
goto restart;
} else {
syslog(LOG_WARNING, "%s: job could not be %s (%s)",
pp->printer,
pp->remote ? "sent to remote host" : "printed",
q->q_name);
if (i == REPRINT) {
/* ensure we don't attempt this job again */
(void) unlink(q->q_name);
q->q_name[0] = 'd';
(void) unlink(q->q_name);
if (logname[0])
sendmail(pp, logname, FATALERR);
}
}
}
free(queue);
/*
* search the spool directory for more work.
*/
if ((nitems = getq(pp, &queue)) < 0) {
syslog(LOG_ERR, "%s: can't scan %s", pp->printer,
pp->spool_dir);
exit(1);
}
if (nitems == 0) { /* no more work to do */
done:
if (count > 0) { /* Files actually printed */
if (!pp->no_formfeed && !pp->tof)
(void) write(ofd, pp->form_feed,
strlen(pp->form_feed));
if (pp->trailer != NULL) /* output trailer */
(void) write(ofd, pp->trailer,
strlen(pp->trailer));
}
(void) close(ofd);
(void) wait(NULL);
(void) unlink(tempfile);
exit(0);
}
goto again;
}
char fonts[4][50]; /* fonts for troff */
char ifonts[4][40] = {
_PATH_VFONTR,
_PATH_VFONTI,
_PATH_VFONTB,
_PATH_VFONTS,
};
/*
* The remaining part is the reading of the control file (cf)
* and performing the various actions.
*/
static int
printit(pp, file)
struct printer *pp;
char *file;
{
register int i;
char *cp;
int bombed = OK;
/*
* open control file; ignore if no longer there.
*/
if ((cfp = fopen(file, "r")) == NULL) {
syslog(LOG_INFO, "%s: %s: %m", pp->printer, file);
return(OK);
}
/*
* Reset troff fonts.
*/
for (i = 0; i < 4; i++)
strcpy(fonts[i], ifonts[i]);
sprintf(&width[2], "%ld", pp->page_width);
strcpy(indent+2, "0");
/*
* read the control file for work to do
*
* file format -- first character in the line is a command
* rest of the line is the argument.
* valid commands are:
*
* S -- "stat info" for symbolic link protection
* J -- "job name" on banner page
* C -- "class name" on banner page
* L -- "literal" user's name to print on banner
* T -- "title" for pr
* H -- "host name" of machine where lpr was done
* P -- "person" user's login name
* I -- "indent" amount to indent output
* R -- laser dpi "resolution"
* f -- "file name" name of text file to print
* l -- "file name" text file with control chars
* p -- "file name" text file to print with pr(1)
* t -- "file name" troff(1) file to print
* n -- "file name" ditroff(1) file to print
* d -- "file name" dvi file to print
* g -- "file name" plot(1G) file to print
* v -- "file name" plain raster file to print
* c -- "file name" cifplot file to print
* 1 -- "R font file" for troff
* 2 -- "I font file" for troff
* 3 -- "B font file" for troff
* 4 -- "S font file" for troff
* N -- "name" of file (used by lpq)
* U -- "unlink" name of file to remove
* (after we print it. (Pass 2 only)).
* M -- "mail" to user when done printing
*
* getline reads a line and expands tabs to blanks
*/
/* pass 1 */
while (getline(cfp))
switch (line[0]) {
case 'H':
strncpy(fromhost, line+1, sizeof(fromhost) - 1);
fromhost[sizeof(fromhost) - 1] = '\0';
if (class[0] == '\0') {
strncpy(class, line+1, sizeof(class) - 1);
class[sizeof(class) - 1] = '\0';
}
continue;
case 'P':
strncpy(logname, line+1, sizeof(logname) - 1);
logname[sizeof(logname) - 1] = '\0';
if (pp->restricted) { /* restricted */
if (getpwnam(logname) == NULL) {
bombed = NOACCT;
sendmail(pp, line+1, bombed);
goto pass2;
}
}
continue;
case 'S':
cp = line+1;
i = 0;
while (*cp >= '0' && *cp <= '9')
i = i * 10 + (*cp++ - '0');
fdev = i;
cp++;
i = 0;
while (*cp >= '0' && *cp <= '9')
i = i * 10 + (*cp++ - '0');
fino = i;
continue;
case 'J':
if (line[1] != '\0') {
strncpy(jobname, line+1, sizeof(jobname) - 1);
jobname[sizeof(jobname) - 1] = '\0';
} else
strcpy(jobname, " ");
continue;
case 'C':
if (line[1] != '\0')
strncpy(class, line+1, sizeof(class) - 1);
else if (class[0] == '\0')
gethostname(class, sizeof(class));
class[sizeof(class) - 1] = '\0';
continue;
case 'T': /* header title for pr */
strncpy(title, line+1, sizeof(title) - 1);
title[sizeof(title) - 1] = '\0';
continue;
case 'L': /* identification line */
if (!pp->no_header && !pp->header_last)
banner(pp, line+1, jobname);
continue;
case '1': /* troff fonts */
case '2':
case '3':
case '4':
if (line[1] != '\0') {
strncpy(fonts[line[0]-'1'], line+1,
50-1);
fonts[line[0]-'1'][50-1] = '\0';
}
continue;
case 'W': /* page width */
strncpy(width+2, line+1, sizeof(width) - 3);
width[2+sizeof(width) - 3] = '\0';
continue;
case 'I': /* indent amount */
strncpy(indent+2, line+1, sizeof(indent) - 3);
indent[2+sizeof(indent) - 3] = '\0';
continue;
default: /* some file to print */
switch (i = print(pp, line[0], line+1)) {
case ERROR:
if (bombed == OK)
bombed = FATALERR;
break;
case REPRINT:
(void) fclose(cfp);
return(REPRINT);
case FILTERERR:
case ACCESS:
bombed = i;
sendmail(pp, logname, bombed);
}
title[0] = '\0';
continue;
case 'N':
case 'U':
case 'M':
case 'R':
continue;
}
/* pass 2 */
pass2:
fseek(cfp, 0L, 0);
while (getline(cfp))
switch (line[0]) {
case 'L': /* identification line */
if (!pp->no_header && pp->header_last)
banner(pp, line+1, jobname);
continue;
case 'M':
if (bombed < NOACCT) /* already sent if >= NOACCT */
sendmail(pp, line+1, bombed);
continue;
case 'U':
if (strchr(line+1, '/'))
continue;
(void) unlink(line+1);
}
/*
* clean-up in case another control file exists
*/
(void) fclose(cfp);
(void) unlink(file);
return(bombed == OK ? OK : ERROR);
}
/*
* Print a file.
* Set up the chain [ PR [ | {IF, OF} ] ] or {IF, RF, TF, NF, DF, CF, VF}.
* Return -1 if a non-recoverable error occured,
* 2 if the filter detected some errors (but printed the job anyway),
* 1 if we should try to reprint this job and
* 0 if all is well.
* Note: all filters take stdin as the file, stdout as the printer,
* stderr as the log file, and must not ignore SIGINT.
*/
static int
print(pp, format, file)
struct printer *pp;
int format;
char *file;
{
register int n;
register char *prog;
int fi, fo;
FILE *fp;
char *av[15], buf[BUFSIZ];
int pid, p[2], stopped = 0;
union wait status;
struct stat stb;
if (lstat(file, &stb) < 0 || (fi = open(file, O_RDONLY)) < 0)
return(ERROR);
/*
* Check to see if data file is a symbolic link. If so, it should
* still point to the same file or someone is trying to print
* something he shouldn't.
*/
if ((stb.st_mode & S_IFMT) == S_IFLNK && fstat(fi, &stb) == 0 &&
(stb.st_dev != fdev || stb.st_ino != fino))
return(ACCESS);
if (!pp->no_formfeed && !pp->tof) { /* start on a fresh page */
(void) write(ofd, pp->form_feed, strlen(pp->form_feed));
pp->tof = 1;
}
if (pp->filters[LPF_INPUT] == NULL
&& (format == 'f' || format == 'l')) {
pp->tof = 0;
while ((n = read(fi, buf, BUFSIZ)) > 0)
if (write(ofd, buf, n) != n) {
(void) close(fi);
return(REPRINT);
}
(void) close(fi);
return(OK);
}
switch (format) {
case 'p': /* print file using 'pr' */
if (pp->filters[LPF_INPUT] == NULL) { /* use output filter */
prog = _PATH_PR;
av[0] = "pr";
av[1] = width;
av[2] = length;
av[3] = "-h";
av[4] = *title ? title : " ";
av[5] = "-F";
av[6] = 0;
fo = ofd;
goto start;
}
pipe(p);
if ((prchild = dofork(pp, DORETURN)) == 0) { /* child */
dup2(fi, 0); /* file is stdin */
dup2(p[1], 1); /* pipe is stdout */
closelog();
closeallfds(3);
execl(_PATH_PR, "pr", width, length,
"-h", *title ? title : " ", "-F", 0);
syslog(LOG_ERR, "cannot execl %s", _PATH_PR);
exit(2);
}
(void) close(p[1]); /* close output side */
(void) close(fi);
if (prchild < 0) {
prchild = 0;
(void) close(p[0]);
return(ERROR);
}
fi = p[0]; /* use pipe for input */
case 'f': /* print plain text file */
prog = pp->filters[LPF_INPUT];
av[1] = width;
av[2] = length;
av[3] = indent;
n = 4;
break;
case 'l': /* like 'f' but pass control characters */
prog = pp->filters[LPF_INPUT];
av[1] = "-c";
av[2] = width;
av[3] = length;
av[4] = indent;
n = 5;
break;
case 'r': /* print a fortran text file */
prog = pp->filters[LPF_FORTRAN];
av[1] = width;
av[2] = length;
n = 3;
break;
case 't': /* print troff output */
case 'n': /* print ditroff output */
case 'd': /* print tex output */
(void) unlink(".railmag");
if ((fo = creat(".railmag", FILMOD)) < 0) {
syslog(LOG_ERR, "%s: cannot create .railmag",
pp->printer);
(void) unlink(".railmag");
} else {
for (n = 0; n < 4; n++) {
if (fonts[n][0] != '/')
(void) write(fo, _PATH_VFONT,
sizeof(_PATH_VFONT) - 1);
(void) write(fo, fonts[n], strlen(fonts[n]));
(void) write(fo, "\n", 1);
}
(void) close(fo);
}
prog = (format == 't') ? pp->filters[LPF_TROFF]
: ((format == 'n') ? pp->filters[LPF_DITROFF]
: pp->filters[LPF_DVI]);
av[1] = pxwidth;
av[2] = pxlength;
n = 3;
break;
case 'c': /* print cifplot output */
prog = pp->filters[LPF_CIFPLOT];
av[1] = pxwidth;
av[2] = pxlength;
n = 3;
break;
case 'g': /* print plot(1G) output */
prog = pp->filters[LPF_GRAPH];
av[1] = pxwidth;
av[2] = pxlength;
n = 3;
break;
case 'v': /* print raster output */
prog = pp->filters[LPF_RASTER];
av[1] = pxwidth;
av[2] = pxlength;
n = 3;
break;
default:
(void) close(fi);
syslog(LOG_ERR, "%s: illegal format character '%c'",
pp->printer, format);
return(ERROR);
}
if (prog == NULL) {
(void) close(fi);
syslog(LOG_ERR,
"%s: no filter found in printcap for format character '%c'",
pp->printer, format);
return(ERROR);
}
if ((av[0] = strrchr(prog, '/')) != NULL)
av[0]++;
else
av[0] = prog;
av[n++] = "-n";
av[n++] = logname;
av[n++] = "-h";
av[n++] = fromhost;
av[n++] = pp->acct_file;
av[n] = 0;
fo = pfd;
if (ofilter > 0) { /* stop output filter */
write(ofd, "\031\1", 2);
while ((pid =
wait3((int *)&status, WUNTRACED, 0)) > 0 && pid != ofilter)
;
if (status.w_stopval != WSTOPPED) {
(void) close(fi);
syslog(LOG_WARNING,
"%s: output filter died "
"(retcode=%d termsig=%d)",
pp->printer, status.w_retcode,
status.w_termsig);
return(REPRINT);
}
stopped++;
}
start:
if ((child = dofork(pp, DORETURN)) == 0) { /* child */
dup2(fi, 0);
dup2(fo, 1);
n = open(tempfile, O_WRONLY|O_CREAT|O_TRUNC, 0664);
if (n >= 0)
dup2(n, 2);
closelog();
closeallfds(3);
execv(prog, av);
syslog(LOG_ERR, "cannot execv %s", prog);
exit(2);
}
(void) close(fi);
if (child < 0)
status.w_retcode = 100;
else
while ((pid = wait((int *)&status)) > 0 && pid != child)
;
child = 0;
prchild = 0;
if (stopped) { /* restart output filter */
if (kill(ofilter, SIGCONT) < 0) {
syslog(LOG_ERR, "cannot restart output filter");
exit(1);
}
}
pp->tof = 0;
/* Copy filter output to "lf" logfile */
if ((fp = fopen(tempfile, "r"))) {
while (fgets(buf, sizeof(buf), fp))
fputs(buf, stderr);
fclose(fp);
}
if (!WIFEXITED(status)) {
syslog(LOG_WARNING, "%s: filter '%c' terminated (termsig=%d)",
pp->printer, format, status.w_termsig);
return(ERROR);
}
switch (status.w_retcode) {
case 0:
pp->tof = 1;
return(OK);
case 1:
return(REPRINT);
case 2:
return(ERROR);
default:
syslog(LOG_WARNING, "%s: filter '%c' exited (retcode=%d)",
pp->printer, format, status.w_retcode);
return(FILTERERR);
}
}
/*
* Send the daemon control file (cf) and any data files.
* Return -1 if a non-recoverable error occured, 1 if a recoverable error and
* 0 if all is well.
*/
static int
sendit(pp, file)
struct printer *pp;
char *file;
{
register int i, err = OK;
char *cp, last[BUFSIZ];
/*
* open control file
*/
if ((cfp = fopen(file, "r")) == NULL)
return(OK);
/*
* read the control file for work to do
*
* file format -- first character in the line is a command
* rest of the line is the argument.
* commands of interest are:
*
* a-z -- "file name" name of file to print
* U -- "unlink" name of file to remove
* (after we print it. (Pass 2 only)).
*/
/*
* pass 1
*/
while (getline(cfp)) {
again:
if (line[0] == 'S') {
cp = line+1;
i = 0;
while (*cp >= '0' && *cp <= '9')
i = i * 10 + (*cp++ - '0');
fdev = i;
cp++;
i = 0;
while (*cp >= '0' && *cp <= '9')
i = i * 10 + (*cp++ - '0');
fino = i;
} else if (line[0] == 'H') {
strcpy(fromhost, line+1);
if (class[0] == '\0')
strncpy(class, line+1, sizeof(class) - 1);
} else if (line[0] == 'P') {
strncpy(logname, line+1, sizeof(logname) - 1);
if (pp->restricted) { /* restricted */
if (getpwnam(logname) == NULL) {
sendmail(pp, line+1, NOACCT);
err = ERROR;
break;
}
}
} else if (line[0] == 'I') {
strncpy(indent+2, line+1, sizeof(indent) - 3);
} else if (line[0] >= 'a' && line[0] <= 'z') {
strcpy(last, line);
while ((i = getline(cfp)) != 0)
if (strcmp(last, line))
break;
switch (sendfile(pp, '\3', last+1, *last)) {
case OK:
if (i)
goto again;
break;
case REPRINT:
(void) fclose(cfp);
return(REPRINT);
case ACCESS:
sendmail(pp, logname, ACCESS);
case ERROR:
err = ERROR;
}
break;
}
}
if (err == OK && sendfile(pp, '\2', file, '\0') > 0) {
(void) fclose(cfp);
return(REPRINT);
}
/*
* pass 2
*/
fseek(cfp, 0L, 0);
while (getline(cfp))
if (line[0] == 'U' && !strchr(line+1, '/'))
(void) unlink(line+1);
/*
* clean-up in case another control file exists
*/
(void) fclose(cfp);
(void) unlink(file);
return(err);
}
/*
* Send a data file to the remote machine and spool it.
* Return positive if we should try resending.
*/
static int
sendfile(pp, type, file, format)
struct printer *pp;
int type;
char *file;
char format;
{
register int f, i, amt;
struct stat stb;
char buf[BUFSIZ];
int sizerr, resp, closedpr;
if (lstat(file, &stb) < 0 || (f = open(file, O_RDONLY)) < 0)
return(ERROR);
/*
* Check to see if data file is a symbolic link. If so, it should
* still point to the same file or someone is trying to print something
* he shouldn't.
*/
if ((stb.st_mode & S_IFMT) == S_IFLNK && fstat(f, &stb) == 0 &&
(stb.st_dev != fdev || stb.st_ino != fino))
return(ACCESS);
sizerr = 0;
closedpr = 0;
if (type == '\3') {
if (pp->filters[LPF_INPUT]) {
/*
* We're sending something with an ifilter, we have to
* run the ifilter and store the output as a
* temporary file (tfile)... the protocol requires us
* to send the file size
*/
char *av[15];
int n;
int ifilter;
union wait status; /* XXX */
strcpy(tfile,TFILENAME);
if ((tfd = mkstemp(tfile)) == -1) {
syslog(LOG_ERR, "mkstemp: %m");
return(ERROR);
}
if ((av[0] = strrchr(pp->filters[LPF_INPUT], '/')) == NULL)
av[0] = pp->filters[LPF_INPUT];
else
av[0]++;
if (format == 'l')
av[n=1] = "-c";
else
n = 0;
av[++n] = width;
av[++n] = length;
av[++n] = indent;
av[++n] = "-n";
av[++n] = logname;
av[++n] = "-h";
av[++n] = fromhost;
av[++n] = pp->acct_file;
av[++n] = 0;
if ((ifilter = dofork(pp, DORETURN)) == 0) { /* child */
dup2(f, 0);
dup2(tfd, 1);
n = open(tempfile, O_WRONLY|O_CREAT|O_TRUNC,
TEMP_FILE_MODE);
if (n >= 0)
dup2(n, 2);
closelog();
closeallfds(3);
execv(pp->filters[LPF_INPUT], av);
syslog(LOG_ERR, "cannot execv %s",
pp->filters[LPF_INPUT]);
exit(2);
}
(void) close(f);
if (ifilter < 0)
status.w_retcode = 100;
else
while ((pid = wait((int *)&status)) > 0 &&
pid != ifilter)
;
switch (status.w_retcode) {
case 0:
break;
case 1:
unlink(tfile);
return(REPRINT);
case 2:
unlink(tfile);
return(ERROR);
default:
syslog(LOG_WARNING, "%s: filter '%c' exited"
" (retcode=%d)",
pp->printer, format, status.w_retcode);
unlink(tfile);
return(FILTERERR);
}
if (fstat(tfd, &stb) < 0) /* the size of tfile */
return(ERROR);
f = tfd;
lseek(f,0,SEEK_SET);
} else if (ofilter) {
/*
* We're sending something with an ofilter, we have to
* store the output as a temporary file (tfile)... the
* protocol requires us to send the file size
*/
int i;
for (i = 0; i < stb.st_size; i += BUFSIZ) {
amt = BUFSIZ;
if (i + amt > stb.st_size)
amt = stb.st_size - i;
if (sizerr == 0 && read(f, buf, amt) != amt) {
sizerr = 1;
break;
}
if (write(ofd, buf, amt) != amt) {
(void) close(f);
return(REPRINT);
}
}
close(ofd);
close(f);
while ((i = wait(NULL)) > 0 && i != ofilter)
;
ofilter = 0;
if (fstat(tfd, &stb) < 0) { /* the size of tfile */
openpr(pp);
return(ERROR);
}
f = tfd;
lseek(f,0,SEEK_SET);
closedpr = 1;
}
}
(void) sprintf(buf, "%c%qd %s\n", type, stb.st_size, file);
amt = strlen(buf);
for (i = 0; ; i++) {
if (write(pfd, buf, amt) != amt ||
(resp = response(pp)) < 0 || resp == '\1') {
(void) close(f);
if (tfd != -1 && type == '\3') {
tfd = -1;
unlink(tfile);
if (closedpr)
openpr(pp);
}
return(REPRINT);
} else if (resp == '\0')
break;
if (i == 0)
pstatus(pp,
"no space on remote; waiting for queue to drain");
if (i == 10)
syslog(LOG_ALERT, "%s: can't send to %s; queue full",
pp->printer, pp->remote_host);
sleep(5 * 60);
}
if (i)
pstatus(pp, "sending to %s", pp->remote_host);
for (i = 0; i < stb.st_size; i += BUFSIZ) {
amt = BUFSIZ;
if (i + amt > stb.st_size)
amt = stb.st_size - i;
if (sizerr == 0 && read(f, buf, amt) != amt)
sizerr = 1;
if (write(pfd, buf, amt) != amt) {
(void) close(f);
if (tfd != -1 && type == '\3') {
tfd = -1;
unlink(tfile);
if (closedpr)
openpr(pp);
}
return(REPRINT);
}
}
(void) close(f);
if (tfd != -1 && type == '\3') {
tfd = -1;
unlink(tfile);
}
if (sizerr) {
syslog(LOG_INFO, "%s: %s: changed size", pp->printer, file);
/* tell recvjob to ignore this file */
(void) write(pfd, "\1", 1);
if (closedpr)
openpr(pp);
return(ERROR);
}
if (write(pfd, "", 1) != 1 || response(pp)) {
if (closedpr)
openpr(pp);
return(REPRINT);
}
if (closedpr)
openpr(pp);
return(OK);
}
/*
* Check to make sure there have been no errors and that both programs
* are in sync with eachother.
* Return non-zero if the connection was lost.
*/
static char
response(pp)
const struct printer *pp;
{
char resp;
if (read(pfd, &resp, 1) != 1) {
syslog(LOG_INFO, "%s: lost connection", pp->printer);
return(-1);
}
return(resp);
}
/*
* Banner printing stuff
*/
static void
banner(pp, name1, name2)
struct printer *pp;
char *name1, *name2;
{
time_t tvec;
time(&tvec);
if (!pp->no_formfeed && !pp->tof)
(void) write(ofd, pp->form_feed, strlen(pp->form_feed));
if (pp->short_banner) { /* short banner only */
if (class[0]) {
(void) write(ofd, class, strlen(class));
(void) write(ofd, ":", 1);
}
(void) write(ofd, name1, strlen(name1));
(void) write(ofd, " Job: ", 7);
(void) write(ofd, name2, strlen(name2));
(void) write(ofd, " Date: ", 8);
(void) write(ofd, ctime(&tvec), 24);
(void) write(ofd, "\n", 1);
} else { /* normal banner */
(void) write(ofd, "\n\n\n", 3);
scan_out(pp, ofd, name1, '\0');
(void) write(ofd, "\n\n", 2);
scan_out(pp, ofd, name2, '\0');
if (class[0]) {
(void) write(ofd,"\n\n\n",3);
scan_out(pp, ofd, class, '\0');
}
(void) write(ofd, "\n\n\n\n\t\t\t\t\tJob: ", 15);
(void) write(ofd, name2, strlen(name2));
(void) write(ofd, "\n\t\t\t\t\tDate: ", 12);
(void) write(ofd, ctime(&tvec), 24);
(void) write(ofd, "\n", 1);
}
if (!pp->no_formfeed)
(void) write(ofd, pp->form_feed, strlen(pp->form_feed));
pp->tof = 1;
}
static char *
scnline(key, p, c)
register int key;
register char *p;
int c;
{
register scnwidth;
for (scnwidth = WIDTH; --scnwidth;) {
key <<= 1;
*p++ = key & 0200 ? c : BACKGND;
}
return (p);
}
#define TRC(q) (((q)-' ')&0177)
static void
scan_out(pp, scfd, scsp, dlm)
struct printer *pp;
int scfd, dlm;
char *scsp;
{
register char *strp;
register nchrs, j;
char outbuf[LINELEN+1], *sp, c, cc;
int d, scnhgt;
for (scnhgt = 0; scnhgt++ < HEIGHT+DROP; ) {
strp = &outbuf[0];
sp = scsp;
for (nchrs = 0; ; ) {
d = dropit(c = TRC(cc = *sp++));
if ((!d && scnhgt > HEIGHT) || (scnhgt <= DROP && d))
for (j = WIDTH; --j;)
*strp++ = BACKGND;
else
strp = scnline(scnkey[(int)c][scnhgt-1-d], strp, cc);
if (*sp == dlm || *sp == '\0' ||
nchrs++ >= pp->page_width/(WIDTH+1)-1)
break;
*strp++ = BACKGND;
*strp++ = BACKGND;
}
while (*--strp == BACKGND && strp >= outbuf)
;
strp++;
*strp++ = '\n';
(void) write(scfd, outbuf, strp-outbuf);
}
}
static int
dropit(c)
int c;
{
switch(c) {
case TRC('_'):
case TRC(';'):
case TRC(','):
case TRC('g'):
case TRC('j'):
case TRC('p'):
case TRC('q'):
case TRC('y'):
return (DROP);
default:
return (0);
}
}
/*
* sendmail ---
* tell people about job completion
*/
static void
sendmail(pp, user, bombed)
struct printer *pp;
char *user;
int bombed;
{
register int i;
int p[2], s;
register char *cp;
struct stat stb;
FILE *fp;
pipe(p);
if ((s = dofork(pp, DORETURN)) == 0) { /* child */
dup2(p[0], 0);
closelog();
closeallfds(3);
if ((cp = strrchr(_PATH_SENDMAIL, '/')) != NULL)
cp++;
else
cp = _PATH_SENDMAIL;
execl(_PATH_SENDMAIL, cp, "-t", 0);
_exit(0);
} else if (s > 0) { /* parent */
dup2(p[1], 1);
printf("To: %s@%s\n", user, fromhost);
printf("Subject: %s printer job \"%s\"\n", pp->printer,
*jobname ? jobname : "<unknown>");
printf("Reply-To: root@%s\n\n", host);
printf("Your printer job ");
if (*jobname)
printf("(%s) ", jobname);
cp = "XXX compiler confusion"; /* XXX shut GCC up */
switch (bombed) {
case OK:
printf("\ncompleted successfully\n");
cp = "OK";
break;
default:
case FATALERR:
printf("\ncould not be printed\n");
cp = "FATALERR";
break;
case NOACCT:
printf("\ncould not be printed without an account on %s\n", host);
cp = "NOACCT";
break;
case FILTERERR:
if (stat(tempfile, &stb) < 0 || stb.st_size == 0 ||
(fp = fopen(tempfile, "r")) == NULL) {
printf("\nhad some errors and may not have printed\n");
break;
}
printf("\nhad the following errors and may not have printed:\n");
while ((i = getc(fp)) != EOF)
putchar(i);
(void) fclose(fp);
cp = "FILTERERR";
break;
case ACCESS:
printf("\nwas not printed because it was not linked to the original file\n");
cp = "ACCESS";
}
fflush(stdout);
(void) close(1);
} else {
syslog(LOG_WARNING, "unable to send mail to %s: %m", user);
return;
}
(void) close(p[0]);
(void) close(p[1]);
wait(NULL);
syslog(LOG_INFO, "mail sent to user %s about job %s on printer %s (%s)",
user, *jobname ? jobname : "<unknown>", pp->printer, cp);
}
/*
* dofork - fork with retries on failure
*/
static int
dofork(pp, action)
const struct printer *pp;
int action;
{
register int i, pid;
for (i = 0; i < 20; i++) {
if ((pid = fork()) < 0) {
sleep((unsigned)(i*i));
continue;
}
/*
* Child should run as daemon instead of root
*/
if (pid == 0)
setuid(pp->daemon_user);
return(pid);
}
syslog(LOG_ERR, "can't fork");
switch (action) {
case DORETURN:
return (-1);
default:
syslog(LOG_ERR, "bad action (%d) to dofork", action);
/*FALL THRU*/
case DOABORT:
exit(1);
}
/*NOTREACHED*/
}
/*
* Kill child processes to abort current job.
*/
static void
abortpr(signo)
int signo;
{
(void) unlink(tempfile);
kill(0, SIGINT);
if (ofilter > 0)
kill(ofilter, SIGCONT);
while (wait(NULL) > 0)
;
if (ofilter > 0 && tfd != -1)
unlink(tfile);
exit(0);
}
static void
init(pp)
struct printer *pp;
{
char *s;
sprintf(&width[2], "%ld", pp->page_width);
sprintf(&length[2], "%ld", pp->page_length);
sprintf(&pxwidth[2], "%ld", pp->page_pwidth);
sprintf(&pxlength[2], "%ld", pp->page_plength);
if ((s = checkremote(pp)) != 0) {
syslog(LOG_WARNING, "%s", s);
free(s);
}
}
void
startprinting(printer)
const char *printer;
{
struct printer myprinter, *pp = &myprinter;
int status;
init_printer(pp);
status = getprintcap(printer, pp);
switch(status) {
case PCAPERR_OSERR:
syslog(LOG_ERR, "can't open printer description file: %m");
exit(1);
case PCAPERR_NOTFOUND:
syslog(LOG_ERR, "unknown printer: %s", printer);
exit(1);
case PCAPERR_TCLOOP:
fatal(pp, "potential reference loop detected in printcap file");
default:
break;
}
printjob(pp);
}
/*
* Acquire line printer or remote connection.
*/
static void
openpr(pp)
const struct printer *pp;
{
int p[2];
char *cp;
if (pp->remote) {
openrem(pp);
} else if (*pp->lp) {
if ((cp = strchr(pp->lp, '@')) != NULL)
opennet(pp);
else
opentty(pp);
} else {
syslog(LOG_ERR, "%s: no line printer device or host name",
pp->printer);
exit(1);
}
/*
* Start up an output filter, if needed.
*/
if (pp->filters[LPF_OUTPUT] && !pp->filters[LPF_INPUT] && !ofilter) {
pipe(p);
if (pp->remote) {
strcpy(tfile, TFILENAME);
tfd = mkstemp(tfile);
}
if ((ofilter = dofork(pp, DOABORT)) == 0) { /* child */
dup2(p[0], 0); /* pipe is std in */
/* tfile/printer is stdout */
dup2(pp->remote ? tfd : pfd, 1);
closelog();
closeallfds(3);
if ((cp = strrchr(pp->filters[LPF_OUTPUT], '/')) == NULL)
cp = pp->filters[LPF_OUTPUT];
else
cp++;
execl(pp->filters[LPF_OUTPUT], cp, width, length, 0);
syslog(LOG_ERR, "%s: %s: %m", pp->printer,
pp->filters[LPF_OUTPUT]);
exit(1);
}
(void) close(p[0]); /* close input side */
ofd = p[1]; /* use pipe for output */
} else {
ofd = pfd;
ofilter = 0;
}
}
/*
* Printer connected directly to the network
* or to a terminal server on the net
*/
static void
opennet(pp)
const struct printer *pp;
{
register int i;
int resp;
u_long port;
char *ep;
void (*savealrm)(int);
port = strtoul(pp->lp, &ep, 0);
if (*ep != ':' || port > 65536) {
syslog(LOG_ERR, "%s: bad port number: %s", pp->printer,
pp->lp);
exit(1);
}
ep++;
for (i = 1; ; i = i < 256 ? i << 1 : i) {
resp = -1;
savealrm = signal(SIGALRM, alarmhandler);
alarm(pp->conn_timeout);
pfd = getport(pp, ep, port);
alarm(0);
(void)signal(SIGALRM, savealrm);
if (pfd < 0 && errno == ECONNREFUSED)
resp = 1;
else if (pfd >= 0) {
/*
* need to delay a bit for rs232 lines
* to stabilize in case printer is
* connected via a terminal server
*/
delay(500);
break;
}
if (i == 1) {
if (resp < 0)
pstatus(pp, "waiting for %s to come up",
pp->lp);
else
pstatus(pp,
"waiting for access to printer on %s",
pp->lp);
}
sleep(i);
}
pstatus(pp, "sending to %s port %d", ep, port);
}
/*
* Printer is connected to an RS232 port on this host
*/
static void
opentty(pp)
const struct printer *pp;
{
register int i;
for (i = 1; ; i = i < 32 ? i << 1 : i) {
pfd = open(pp->lp, pp->rw ? O_RDWR : O_WRONLY);
if (pfd >= 0) {
delay(500);
break;
}
if (errno == ENOENT) {
syslog(LOG_ERR, "%s: %m", pp->lp);
exit(1);
}
if (i == 1)
pstatus(pp,
"waiting for %s to become ready (offline?)",
pp->printer);
sleep(i);
}
if (isatty(pfd))
setty(pp);
pstatus(pp, "%s is ready and printing", pp->printer);
}
/*
* Printer is on a remote host
*/
static void
openrem(pp)
const struct printer *pp;
{
register int i;
int resp;
void (*savealrm)(int);
for (i = 1; ; i = i < 256 ? i << 1 : i) {
resp = -1;
savealrm = signal(SIGALRM, alarmhandler);
alarm(pp->conn_timeout);
pfd = getport(pp, pp->remote_host, 0);
alarm(0);
(void)signal(SIGALRM, savealrm);
if (pfd >= 0) {
if ((writel(pfd, "\2", pp->remote_queue, "\n",
(char *)0)
== 2 + strlen(pp->remote_queue))
&& (resp = response(pp)) == 0)
break;
(void) close(pfd);
}
if (i == 1) {
if (resp < 0)
pstatus(pp, "waiting for %s to come up",
pp->remote_host);
else {
pstatus(pp,
"waiting for queue to be enabled on %s",
pp->remote_host);
i = 256;
}
}
sleep(i);
}
pstatus(pp, "sending to %s", pp->remote_host);
}
/*
* setup tty lines.
*/
static void
setty(pp)
const struct printer *pp;
{
struct termios ttybuf;
if (ioctl(pfd, TIOCEXCL, (char *)0) < 0) {
syslog(LOG_ERR, "%s: ioctl(TIOCEXCL): %m", pp->printer);
exit(1);
}
if (tcgetattr(pfd, &ttybuf) < 0) {
syslog(LOG_ERR, "%s: tcgetattr: %m", pp->printer);
exit(1);
}
if (pp->baud_rate > 0)
cfsetspeed(&ttybuf, pp->baud_rate);
if (pp->mode_set) {
char *s = strdup(pp->mode_set), *tmp;
while ((tmp = strsep(&s, ",")) != NULL) {
msearch(tmp, &ttybuf);
}
}
if (pp->mode_set != 0 || pp->baud_rate > 0) {
if (tcsetattr(pfd, TCSAFLUSH, &ttybuf) == -1) {
syslog(LOG_ERR, "%s: tcsetattr: %m", pp->printer);
}
}
}
#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
static void
#ifdef __STDC__
pstatus(const struct printer *pp, const char *msg, ...)
#else
pstatus(pp, msg, va_alist)
const struct printer *pp;
char *msg;
va_dcl
#endif
{
int fd;
char *buf;
va_list ap;
#ifdef __STDC__
va_start(ap, msg);
#else
va_start(ap);
#endif
umask(0);
fd = open(pp->status_file, O_WRONLY|O_CREAT|O_EXLOCK, STAT_FILE_MODE);
if (fd < 0) {
syslog(LOG_ERR, "%s: %s: %m", pp->printer, pp->status_file);
exit(1);
}
ftruncate(fd, 0);
vasprintf(&buf, msg, ap);
va_end(ap);
writel(fd, buf, "\n", (char *)0);
close(fd);
free(buf);
}
void
alarmhandler(signo)
{
/* ignored */
}
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