* Copyright (c) 1983, 1993

/* $NetBSD: printjob.c,v 1.57 2019/02/03 03:19:30 mrg Exp $ */

/*
* 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. 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.
*/

#include <sys/cdefs.h>

#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1983, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)printjob.c 8.7 (Berkeley) 5/10/95";
#else
__RCSID("$NetBSD: printjob.c,v 1.57 2019/02/03 03:19:30 mrg Exp $");
#endif
#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 <sys/file.h>

#include <pwd.h>
#include <unistd.h>
#include <sys/uio.h>
#include <signal.h>
#include <termios.h>
#include <syslog.h>
#include <fcntl.h>
#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.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 pfd; /* printer file descriptor */
static int pid; /* pid of lpd process */
static int prchild; /* id of pr process */
static char title[80]; /* ``pr'' title */
static int tof; /* true if at top of form */

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 output */
static char tempremote[] = "remoteXXXXXX"; /* file name for remote filter */
static char width[10] = "-w"; /* page width in static characters */

__dead static void abortpr(int);
static void banner(char *, char *);
static int dofork(int);
static int dropit(int);
static void init(void);
static void setup_ofilter(int);
static void close_ofilter(void);
static void openpr(void);
static void opennet(void);
static void opentty(void);
static void openrem(void);
static int print(int, char *);
static int printit(char *);
static void pstatus(const char *, ...)
__attribute__((__format__(__printf__, 1, 2)));
static char response(void);
static void scan_out(int, char *, int);
static char *scnline(int, char *, int);
static int sendfile(int, char *);
static int sendit(char *);
static void sendmail(char *, int);
static void setty(void);
static void alarmer(int);

void
printjob(void)
{
struct stat stb;
struct queue *q, **qp;
struct queue **queue;
int i, nitems, fd;
off_t pidoff;
int errcnt, count = 0;

init(); /* set up capabilities */
(void)write(STDOUT_FILENO, "", 1); /* ack that daemon is started */

/* set up log file */
if ((fd = open(LF, O_WRONLY|O_APPEND, 0664)) < 0) {
syslog(LOG_ERR, "%s: %m", LF);
fd = open(_PATH_DEVNULL, O_WRONLY);
}
if (fd > 0) {
(void) dup2(fd, STDERR_FILENO);
(void) close(fd);
} else
(void)close(STDERR_FILENO);

setgid(getegid());
pid = getpid(); /* for use with lprm */
setpgrp(0, pid);
signal(SIGHUP, abortpr);
signal(SIGINT, abortpr);
signal(SIGQUIT, abortpr);
signal(SIGTERM, abortpr);

/*
* uses short form file names
*/
if (chdir(SD) < 0) {
syslog(LOG_ERR, "%s: %m", SD);
exit(1);
}
if (stat(LO, &stb) == 0 && (stb.st_mode & S_IXUSR))
exit(0); /* printing disabled */
lfd = open(LO, O_WRONLY|O_CREAT, 0644);
if (lfd < 0) {
syslog(LOG_ERR, "%s: %s: %m", printer, LO);
exit(1);
}
if (flock(lfd, LOCK_EX|LOCK_NB) < 0) {
if (errno == EWOULDBLOCK) /* active daemon present */
exit(0);
syslog(LOG_ERR, "%s: %s: %m", printer, LO);
exit(1);
}
ftruncate(lfd, 0);
/*
* write process id for others to know
*/
pidoff = i = snprintf(line, sizeof(line), "%u\n", pid);
if (write(lfd, line, i) != i) {
syslog(LOG_ERR, "%s: %s: %m", printer, LO);
exit(1);
}

/*
* create the temp filenames.
* XXX arguably we should keep the fds open and fdopen(3) dup()s,
* XXX but we're in a protected directory so it shouldn't matter.
*/
if ((fd = mkstemp(tempfile)) != -1) {
(void)close(fd);
(void)unlink(tempfile);
}
if ((fd = mkstemp(tempremote)) != -1) {
(void)close(fd);
(void)unlink(tempremote);
}

/*
* search the spool directory for work and sort by queue order.
*/
if ((nitems = getq(&queue)) < 0) {
syslog(LOG_ERR, "%s: can't scan %s", printer, SD);
exit(1);
}
if (nitems == 0) /* no work to do */
exit(0);
if (stb.st_mode & S_IXOTH) { /* reset queue flag */
stb.st_mode &= ~S_IXOTH;
if (fchmod(lfd, stb.st_mode & 0777) < 0)
syslog(LOG_ERR, "%s: %s: %m", printer, LO);
}
openpr(); /* 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);
i = snprintf(line, sizeof(line), "%s\n", q->q_name);
if (write(lfd, line, i) != i)
syslog(LOG_ERR, "%s: %s: %m", printer, LO);
if (!remote)
i = printit(q->q_name);
else
i = sendit(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 & S_IXUSR)
goto done;
/* rebuild queue (after lpc topq) */
if (stb.st_mode & S_IXOTH) {
for (free((char *) q); nitems--; free((char *) q))
q = *qp++;
stb.st_mode &= ~S_IXOTH;
if (fchmod(lfd, stb.st_mode & 0777) < 0)
syslog(LOG_WARNING, "%s: %s: %m",
printer, LO);
break;
}
}
if (i == OK) /* file ok and printed */
count++;
else if (i == REPRINT && ++errcnt < 5) {
/* try reprinting the job */
syslog(LOG_INFO, "restarting %s", printer);
if (ofilter > 0)
close_ofilter();
(void)close(pfd); /* close printer */
if (ftruncate(lfd, pidoff) < 0)
syslog(LOG_WARNING, "%s: %s: %m", printer, LO);
openpr(); /* try to reopen printer */
goto restart;
} else {
syslog(LOG_WARNING, "%s: job could not be %s (%s)", printer,
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(logname, FATALERR);
}
}
}
free(queue);
queue = NULL;
/*
* search the spool directory for more work.
*/
if ((nitems = getq(&queue)) < 0) {
syslog(LOG_ERR, "%s: can't scan %s", printer, SD);
exit(1);
}
if (nitems == 0) { /* no more work to do */
done:
if (count > 0) { /* Files actually printed */
if (!SF && !tof)
(void)write(ofd, FF, strlen(FF));
if (TR != NULL) /* output trailer */
(void)write(ofd, TR, strlen(TR));
}
(void)unlink(tempfile);
(void)unlink(tempremote);
exit(0);
}
goto again;
}

#define FONTLEN 50
char fonts[4][FONTLEN]; /* 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(char *file)
{
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", printer, file);
return(OK);
}
/*
* Reset troff fonts.
*/
for (i = 0; i < 4; i++)
strlcpy(fonts[i], ifonts[i], sizeof(fonts[i]));
(void)snprintf(&width[2], sizeof(width) - 2, "%ld", PW);
indent[2] = '0';
indent[3] = '\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
* o -- "file name" postscript 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
*
* get_line reads a line and expands tabs to blanks
*/

/* pass 1 */

while (get_line(cfp))
switch (line[0]) {
case 'H':
strlcpy(fromhost, line+1, sizeof(fromhost));
if (class[0] == '\0')
strlcpy(class, line+1, sizeof(class));
continue;

case 'P':
strlcpy(logname, line+1, sizeof(logname));
if (RS) { /* restricted */
if (getpwnam(logname) == NULL) {
bombed = NOACCT;
sendmail(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')
strlcpy(jobname, line+1, sizeof(jobname));
else {
jobname[0] = ' ';
jobname[1] = '\0';
}
continue;

case 'C':
if (line[1] != '\0')
strlcpy(class, line+1, sizeof(class));
else if (class[0] == '\0') {
gethostname(class, sizeof(class));
class[sizeof(class) - 1] = '\0';
}
continue;

case 'T': /* header title for pr */
strlcpy(title, line+1, sizeof(title));
continue;

case 'L': /* identification line */
if (!SH && !HL)
banner(line+1, jobname);
continue;

case '1': /* troff fonts */
case '2':
case '3':
case '4':
if (line[1] != '\0') {
strlcpy(fonts[line[0]-'1'], line+1,
sizeof(fonts[line[0]-'1']));
}
continue;

case 'W': /* page width */
strlcpy(width+2, line+1, sizeof(width) - 2);
continue;

case 'I': /* indent amount */
strlcpy(indent+2, line+1, sizeof(indent) - 2);
continue;

default: /* some file to print */
switch (i = print(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(logname, bombed);
}
title[0] = '\0';
continue;

case 'N':
case 'U':
case 'M':
case 'R':
continue;
}

/* pass 2 */

pass2:
fseek(cfp, 0L, 0);
while (get_line(cfp))
switch (line[0]) {
case 'L': /* identification line */
if (!SH && HL)
banner(line+1, jobname);
continue;

case 'M':
if (bombed < NOACCT) /* already sent if >= NOACCT */
sendmail(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 occurred,
* 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(int format, char *file)
{
FILE *fp;
int status;
struct stat stb;
const char *prog, *av[17];
char buf[BUFSIZ];
int n, fi, fo, child_pid, p[2], stopped = 0, nofile;

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 (S_ISLNK(stb.st_mode) && fstat(fi, &stb) == 0 &&
(stb.st_dev != fdev || stb.st_ino != fino))
return(ACCESS);
if (!SF && !tof) { /* start on a fresh page */
(void)write(ofd, FF, strlen(FF));
tof = 1;
}
if (IF == NULL && (format == 'f' || format == 'l')) {
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 (IF == 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] = 0;
fo = ofd;
goto start;
}
pipe(p);
if ((prchild = dofork(DORETURN)) == 0) { /* child */
dup2(fi, 0); /* file is stdin */
dup2(p[1], 1); /* pipe is stdout */
closelog();
nofile = sysconf(_SC_OPEN_MAX);
for (n = 3; n < nofile; n++)
(void)close(n);
execl(_PATH_PR, "pr", width, length,
"-h", *title ? title : " ", NULL);
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 */
/* FALLTHROUGH */
case 'f': /* print plain text file */
prog = IF;
av[1] = width;
av[2] = length;
av[3] = indent;
n = 4;
break;
case 'o': /* print a postscript file */
if (PF == NULL) {
/* if PF is not set, handle it like an 'l' */
prog = IF;
av[1] = "-c";
av[2] = width;
av[3] = length;
av[4] = indent;
n = 5;
break;
} else {
prog = PF;
av[1] = pxwidth;
av[2] = pxlength;
n = 3;
break;
}
case 'l': /* like 'f' but pass control characters */
prog = IF;
av[1] = "-c";
av[2] = width;
av[3] = length;
av[4] = indent;
n = 5;
break;
case 'r': /* print a fortran text file */
prog = RF;
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", 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') ? TF : (format == 'n') ? NF : DF;
av[1] = pxwidth;
av[2] = pxlength;
n = 3;
break;
case 'c': /* print cifplot output */
prog = CF;
av[1] = pxwidth;
av[2] = pxlength;
n = 3;
break;
case 'g': /* print plot(1G) output */
prog = GF;
av[1] = pxwidth;
av[2] = pxlength;
n = 3;
break;
case 'v': /* print raster output */
prog = VF;
av[1] = pxwidth;
av[2] = pxlength;
n = 3;
break;
default:
(void)close(fi);
syslog(LOG_ERR, "%s: illegal format character '%c'",
printer, format);
return(ERROR);
}
if (prog == NULL) {
(void)close(fi);
syslog(LOG_ERR,
"%s: no filter found in printcap for format character '%c'",
printer, format);
return (ERROR);
}
if ((av[0] = strrchr(prog, '/')) != NULL)
av[0]++;
else
av[0] = prog;
av[n++] = "-n";
av[n++] = logname;
if (*jobname != '\0' && strcmp(jobname, " ") != 0) {
av[n++] = "-j";
av[n++] = jobname;
}
av[n++] = "-h";
av[n++] = fromhost;
av[n++] = AF;
av[n] = 0;
fo = pfd;
if (ofilter > 0) { /* stop output filter */
write(ofd, "\031\1", 2);
while ((child_pid =
wait3(&status, WUNTRACED, 0)) > 0 && child_pid != ofilter)
;
if (WIFSTOPPED(status) == 0) {
(void)close(fi);
syslog(LOG_WARNING,
"%s: output filter died (retcode=%d termsig=%d)",
printer, WEXITSTATUS(status), WTERMSIG(status));
return(REPRINT);
}
stopped++;
}
start:
if ((child = dofork(DORETURN)) == 0) { /* child */
dup2(fi, 0);
dup2(fo, 1);
unlink(tempfile);
n = open(tempfile, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0664);
if (n >= 0)
dup2(n, 2);
closelog();
nofile = sysconf(_SC_OPEN_MAX);
for (n = 3; n < nofile; n++)
(void)close(n);
execv(prog, __UNCONST(av));
syslog(LOG_ERR, "cannot execv %s", prog);
exit(2);
}
if (child < 0) {
child = 0;
prchild = 0;
tof = 0;
syslog(LOG_ERR, "cannot start child process: %m");
return (ERROR);
}
(void)close(fi);
while ((child_pid = wait(&status)) > 0 && child_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);
}
}
tof = 0;

/* Copy filter output to "lf" logfile */
if ((fp = fopen(tempfile, "r")) != NULL) {
while (fgets(buf, sizeof(buf), fp))
fputs(buf, stderr);
fclose(fp);
}

if (!WIFEXITED(status)) {
syslog(LOG_WARNING,
"%s: Daemon filter '%c' terminated (pid=%d) (termsig=%d)",
printer, format, (int)child_pid, WTERMSIG(status));
return(ERROR);
}
switch (WEXITSTATUS(status)) {
case 0:
tof = 1;
return(OK);
case 1:
return(REPRINT);
case 2:
return(ERROR);
default:
syslog(LOG_WARNING, "%s: filter '%c' exited (retcode=%d)",
printer, format, WEXITSTATUS(status));
return(FILTERERR);
}
}

/*
* Send the daemon control file (cf) and any data files.
* Return -1 if a non-recoverable error occurred, 1 if a recoverable error and
* 0 if all is well.
*/
static int
sendit(char *file)
{
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 (get_line(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;
continue;
}
if (line[0] >= 'a' && line[0] <= 'z') {
strlcpy(last, line, sizeof(last));
while ((i = get_line(cfp)) != 0)
if (strcmp(last, line))
break;
switch (sendfile('\3', last+1)) {
case OK:
if (i)
goto again;
break;
case REPRINT:
(void)fclose(cfp);
return(REPRINT);
case ACCESS:
sendmail(logname, ACCESS);
/* FALLTHROUGH */
case ERROR:
err = ERROR;
}
break;
}
}
if (err == OK && sendfile('\2', file) > 0) {
(void)fclose(cfp);
return(REPRINT);
}
/*
* pass 2
*/
fseek(cfp, 0L, 0);
while (get_line(cfp))
if (line[0] == 'U' && strchr(line+1, '/') == 0)
(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(int type, char *file)
{
int f, i, amt;
struct stat stb;
char buf[BUFSIZ];
int sizerr, resp;
extern int rflag;
char *save_file;

save_file = file;
if (type == '\3' && rflag && (OF || IF)) {
int save_pfd = pfd;

(void)unlink(tempremote);
pfd = open(tempremote, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0664);
if (pfd == -1) {
pfd = save_pfd;
return ERROR;
}
setup_ofilter(1);
switch (i = print('f', file)) {
case ERROR:
case REPRINT:
case FILTERERR:
case ACCESS:
return(i);
}
close_ofilter();
pfd = save_pfd;
file = tempremote;
}

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 (S_ISLNK(stb.st_mode) && fstat(f, &stb) == 0 &&
(stb.st_dev != fdev || stb.st_ino != fino))
return(ACCESS);

amt = snprintf(buf, sizeof(buf), "%c%lld %s\n", type,
(long long)stb.st_size, save_file);
for (i = 0; ; i++) {
if (write(pfd, buf, amt) != amt ||
(resp = response()) < 0 || resp == '\1') {
(void)close(f);
return(REPRINT);
} else if (resp == '\0')
break;
if (i == 0)
pstatus("no space on remote; waiting for queue to drain");
if (i == 10)
syslog(LOG_ALERT, "%s: can't send to %s; queue full",
printer, RM);
sleep(5 * 60);
}
if (i)
pstatus("sending to %s", RM);
sizerr = 0;
for (i = 0; i < stb.st_size; i += BUFSIZ) {
struct sigaction osa, nsa;

amt = BUFSIZ;
if (i + amt > stb.st_size)
amt = stb.st_size - i;
if (sizerr == 0 && read(f, buf, amt) != amt)
sizerr = 1;
nsa.sa_handler = alarmer;
sigemptyset(&nsa.sa_mask);
sigaddset(&nsa.sa_mask, SIGALRM);
nsa.sa_flags = 0;
(void)sigaction(SIGALRM, &nsa, &osa);
alarm(wait_time);
if (write(pfd, buf, amt) != amt) {
alarm(0);
(void)sigaction(SIGALRM, &osa, NULL);
(void)close(f);
return(REPRINT);
}
alarm(0);
(void)sigaction(SIGALRM, &osa, NULL);
}

(void)close(f);
if (sizerr) {
syslog(LOG_INFO, "%s: %s: changed size", printer, file);
/* tell recvjob to ignore this file */
(void)write(pfd, "\1", 1);
return(ERROR);
}
if (write(pfd, "", 1) != 1 || response())
return(REPRINT);
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(void)
{
struct sigaction osa, nsa;
char resp;

nsa.sa_handler = alarmer;
sigemptyset(&nsa.sa_mask);
sigaddset(&nsa.sa_mask, SIGALRM);
nsa.sa_flags = 0;
(void)sigaction(SIGALRM, &nsa, &osa);
alarm(wait_time);
if (read(pfd, &resp, 1) != 1) {
syslog(LOG_INFO, "%s: lost connection", printer);
resp = -1;
}
alarm(0);
(void)sigaction(SIGALRM, &osa, NULL);
return (resp);
}

/*
* Banner printing stuff
*/
static void
banner(char *name1, char *name2)
{
time_t tvec;

time(&tvec);
if (!SF && !tof)
(void)write(ofd, FF, strlen(FF));
if (SB) { /* 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(ofd, name1, '\0');
(void)write(ofd, "\n\n", 2);
scan_out(ofd, name2, '\0');
if (class[0]) {
(void)write(ofd,"\n\n\n",3);
scan_out(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 (!SF)
(void)write(ofd, FF, strlen(FF));
tof = 1;
}

static char *
scnline(int key, char *p, int c)
{
int scnwidth;

for (scnwidth = WIDTH; --scnwidth;) {
key <<= 1;
*p++ = key & 0200 ? c : BACKGND;
}
return (p);
}

#define TRC(q) (((q)-' ')&0177)

static void
scan_out(int scfd, char *scsp, int dlm)
{
char *strp;
int nchrs, j;
char outbuf[LINELEN+1], *sp, c, cc;
int d, scnhgt;
extern const char scnkey[][HEIGHT]; /* in lpdchar.c */

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++ >= PW/(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(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(char *user, int bombed)
{
int i, p[2], s, nofile;
const char *cp = NULL; /* XXX gcc */
struct stat stb;
FILE *fp;

if (user[0] == '-' || user[0] == '/' || !isprint((unsigned char)user[0]))
return;
pipe(p);
if ((s = dofork(DORETURN)) == 0) { /* child */
dup2(p[0], 0);
closelog();
nofile = sysconf(_SC_OPEN_MAX);
for (i = 3; i < nofile; i++)
(void)close(i);
if ((cp = strrchr(_PATH_SENDMAIL, '/')) != NULL)
cp++;
else
cp = _PATH_SENDMAIL;
execl(_PATH_SENDMAIL, cp, "-t", NULL);
_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", printer,
*jobname ? jobname : "<unknown>");
printf("Reply-To: root@%s\n\n", host);
printf("Your printer job ");
if (*jobname)
printf("(%s) ", jobname);
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:
cp = "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);
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_ERR, "fork for sendmail failed: %m");
}
(void)close(p[0]);
(void)close(p[1]);
if (s > 0) {
wait(NULL);
syslog(LOG_INFO, "mail sent to user %s about job %s on "
"printer %s (%s)", user, *jobname ? jobname : "<unknown>",
printer, cp);
}
}

/*
* dofork - fork with retries on failure
*/
static int
dofork(int action)
{
int i, child_pid;
struct passwd *pw;

for (i = 0; i < 20; i++) {
if ((child_pid = fork()) < 0) {
sleep((unsigned)(i*i));
continue;
}
/*
* Child should run as daemon instead of root
*/
if (child_pid == 0) {
pw = getpwuid(DU);
if (pw == 0) {
syslog(LOG_ERR, "uid %ld not in password file",
DU);
break;
}
initgroups(pw->pw_name, pw->pw_gid);
setgid(pw->pw_gid);
setuid(DU);
signal(SIGCHLD, SIG_DFL);
}
return (child_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(int signo)
{
(void)unlink(tempfile);
(void)unlink(tempremote);
kill(0, SIGINT);
if (ofilter > 0)
kill(ofilter, SIGCONT);
while (wait(NULL) > 0)
;
exit(0);
}

static void
init(void)
{
char *s;

getprintcap(printer);

FF = cgetstr(bp, "ff", &s) == -1 ? DEFFF : s;

if (cgetnum(bp, "du", &DU) < 0)
DU = DEFUID;
if (cgetnum(bp, "pw", &PW) < 0)
PW = DEFWIDTH;
(void)snprintf(&width[2], sizeof(width) - 2, "%ld", PW);
if (cgetnum(bp, "pl", &PL) < 0)
PL = DEFLENGTH;
(void)snprintf(&length[2], sizeof(length) - 2, "%ld", PL);
if (cgetnum(bp,"px", &PX) < 0)
PX = 0;
(void)snprintf(&pxwidth[2], sizeof(pxwidth) - 2, "%ld", PX);
if (cgetnum(bp, "py", &PY) < 0)
PY = 0;
(void)snprintf(&pxlength[2], sizeof(pxlength) - 2, "%ld", PY);

AF = cgetstr(bp, "af", &s) == -1 ? NULL : s;
OF = cgetstr(bp, "of", &s) == -1 ? NULL : s;
IF = cgetstr(bp, "if", &s) == -1 ? NULL : s;
RF = cgetstr(bp, "rf", &s) == -1 ? NULL : s;
TF = cgetstr(bp, "tf", &s) == -1 ? NULL : s;
NF = cgetstr(bp, "nf", &s) == -1 ? NULL : s;
DF = cgetstr(bp, "df", &s) == -1 ? NULL : s;
GF = cgetstr(bp, "gf", &s) == -1 ? NULL : s;
VF = cgetstr(bp, "vf", &s) == -1 ? NULL : s;
CF = cgetstr(bp, "cf", &s) == -1 ? NULL : s;
PF = cgetstr(bp, "pf", &s) == -1 ? NULL : s;
TR = cgetstr(bp, "tr", &s) == -1 ? NULL : s;

RS = (cgetcap(bp, "rs", ':') != NULL);
SF = (cgetcap(bp, "sf", ':') != NULL);
SH = (cgetcap(bp, "sh", ':') != NULL);
SB = (cgetcap(bp, "sb", ':') != NULL);
HL = (cgetcap(bp, "hl", ':') != NULL);
RW = (cgetcap(bp, "rw", ':') != NULL);

cgetnum(bp, "br", &BR);
if (cgetnum(bp, "fc", &FC) < 0)
FC = 0;
if (cgetnum(bp, "fs", &FS) < 0)
FS = 0;
if (cgetnum(bp, "xc", &XC) < 0)
XC = 0;
if (cgetnum(bp, "xs", &XS) < 0)
XS = 0;
MS = cgetstr(bp, "ms", &s) == -1 ? NULL : s;

tof = (cgetcap(bp, "fo", ':') == NULL);
}

/*
* Setup output filter - called once for local printer, or (if -r given to lpd)
* once per file for remote printers
*/
static void
setup_ofilter(int check_rflag)
{
extern int rflag;

if (OF && (!remote || (check_rflag && rflag))) {
int p[2];
int i, nofile;
const char *cp;

pipe(p);
if ((ofilter = dofork(DOABORT)) == 0) { /* child */
dup2(p[0], 0); /* pipe is std in */
dup2(pfd, 1); /* printer is std out */
closelog();
nofile = sysconf(_SC_OPEN_MAX);
for (i = 3; i < nofile; i++)
(void)close(i);
if ((cp = strrchr(OF, '/')) == NULL)
cp = OF;
else
cp++;
execl(OF, cp, width, length, NULL);
syslog(LOG_ERR, "%s: %s: %m", printer, OF);
exit(1);
}
(void)close(p[0]); /* close input side */
ofd = p[1]; /* use pipe for output */
} else {
ofd = pfd;
ofilter = 0;
}
}

/*
* Close the output filter and reset ofd back to the main pfd descriptor
*/
static void
close_ofilter(void)
{
int i;

if (ofilter) {
kill(ofilter, SIGCONT); /* to be sure */
(void)close(ofd);
ofd = pfd;
while ((i = wait(NULL)) > 0 && i != ofilter)
;
ofilter = 0;
}
}

/*
* Acquire line printer or remote connection.
*/
static void
openpr(void)
{
if (!remote && *LP) {
if (strchr(LP, '@') != NULL)
opennet();
else
opentty();
} else if (remote) {
openrem();
} else {
syslog(LOG_ERR, "%s: no line printer device or host name",
printer);
exit(1);
}

/*
* Start up an output filter, if needed.
*/
setup_ofilter(0);
}

/*
* Printer connected directly to the network
* or to a terminal server on the net
*/
static void
opennet(void)
{
int i;
int resp;

for (i = 1; ; i = i < 256 ? i << 1 : i) {
resp = -1;
pfd = getport(LP);
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("waiting for %s to come up", LP);
else
pstatus("waiting for access to printer on %s", LP);
}
sleep(i);
}
pstatus("sending to %s", LP);
}

/*
* Printer is connected to an RS232 port on this host
*/
static void
opentty(void)
{
int i;

for (i = 1; ; i = i < 32 ? i << 1 : i) {
pfd = open(LP, RW ? O_RDWR : O_WRONLY);
if (pfd >= 0) {
delay(500);
break;
}
if (errno == ENOENT) {
syslog(LOG_ERR, "%s: %m", LP);
exit(1);
}
if (i == 1)
pstatus("waiting for %s to become ready (offline ?)",
printer);
sleep(i);
}
if (isatty(pfd))
setty();
pstatus("%s is ready and printing", printer);
}

/*
* Printer is on a remote host
*/
static void
openrem(void)
{
int i, n;
int resp;

for (i = 1; ; i = i < 256 ? i << 1 : i) {
resp = -1;
pfd = getport(RM);
if (pfd >= 0) {
n = snprintf(line, sizeof(line), "\2%s\n", RP);
if (write(pfd, line, n) == n &&
(resp = response()) == '\0')
break;
(void) close(pfd);
}
if (i == 1) {
if (resp < 0)
pstatus("waiting for %s to come up", RM);
else {
pstatus("waiting for queue to be enabled on %s",
RM);
i = 256;
}
}
sleep(i);
}
pstatus("sending to %s", RM);
}

static void
alarmer(int s)
{
/* nothing */
}

#if !defined(__NetBSD__)
struct bauds {
int baud;
int speed;
} bauds[] = {
50, B50,
75, B75,
110, B110,
134, B134,
150, B150,
200, B200,
300, B300,
600, B600,
1200, B1200,
1800, B1800,
2400, B2400,
4800, B4800,
9600, B9600,
19200, B19200,
38400, B38400,
57600, B57600,
115200, B115200,
0, 0
};
#endif

/*
* setup tty lines.
*/
static void
setty(void)
{
struct info i;
char **argv, **ap, *p, *val;

i.fd = pfd;
i.set = i.wset = 0;
if (ioctl(i.fd, TIOCEXCL, (char *)0) < 0) {
syslog(LOG_ERR, "%s: ioctl(TIOCEXCL): %m", printer);
exit(1);
}
if (tcgetattr(i.fd, &i.t) < 0) {
syslog(LOG_ERR, "%s: tcgetattr: %m", printer);
exit(1);
}
if (BR > 0) {
#if !defined(__NetBSD__)
struct bauds *bp;
for (bp = bauds; bp->baud; bp++)
if (BR == bp->baud)
break;
if (!bp->baud) {
syslog(LOG_ERR, "%s: illegal baud rate %d", printer, BR);
exit(1);
}
cfsetspeed(&i.t, bp->speed);
#else
cfsetspeed(&i.t, BR);
#endif
i.set = 1;
}
if (MS) {
if (ioctl(i.fd, TIOCGETD, &i.ldisc) < 0) {
syslog(LOG_ERR, "%s: ioctl(TIOCGETD): %m", printer);
exit(1);
}
if (ioctl(i.fd, TIOCGWINSZ, &i.win) < 0)
syslog(LOG_INFO, "%s: ioctl(TIOCGWINSZ): %m",
printer);

argv = (char **)calloc(256, sizeof(char *));
if (argv == NULL) {
syslog(LOG_ERR, "%s: calloc: %m", printer);
exit(1);
}
p = strdup(MS);
ap = argv;
while ((val = strsep(&p, " \t,")) != NULL) {
*ap++ = strdup(val);
}

for (; *argv; ++argv) {
if (ksearch(&argv, &i))
continue;
if (msearch(&argv, &i))
continue;
syslog(LOG_INFO, "%s: unknown stty flag: %s",
printer, *argv);
}
} else {
if (FC) {
sttyclearflags(&i.t, FC);
i.set = 1;
}
if (FS) {
sttysetflags(&i.t, FS);
i.set = 1;
}
if (XC) {
sttyclearlflags(&i.t, XC);
i.set = 1;
}
if (XS) {
sttysetlflags(&i.t, XS);
i.set = 1;
}
}

if (i.set && tcsetattr(i.fd, TCSANOW, &i.t) < 0) {
syslog(LOG_ERR, "%s: tcsetattr: %m", printer);
exit(1);
}
if (i.wset && ioctl(i.fd, TIOCSWINSZ, &i.win) < 0)
syslog(LOG_INFO, "%s: ioctl(TIOCSWINSZ): %m", printer);
return;
}

#include <stdarg.h>

static void
pstatus(const char *msg, ...)
{
int fd;
char *buf;
va_list ap;
struct iovec iov[2];

umask(0);
fd = open(ST, O_WRONLY|O_CREAT, 0664);
if (fd < 0 || flock(fd, LOCK_EX) < 0) {
syslog(LOG_ERR, "%s: %s: %m", printer, ST);
exit(1);
}
ftruncate(fd, 0);
va_start(ap, msg);
(void)vasprintf(&buf, msg, ap);
va_end(ap);

iov[0].iov_base = buf;
iov[0].iov_len = strlen(buf);
iov[1].iov_base = __UNCONST("\n");
iov[1].iov_len = 1;
(void)writev(fd, iov, 2);
(void)close(fd);
free(buf);
}