2.11BSD/src/usr.sbin/lpr/printjob.c
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#if !defined(lint) && defined(DOSCCS)
static char sccsid[] = "@(#)printjob.c 5.2.3 (2.11BSD GTE) 1996/12/23";
#endif
/*
* 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 "lp.h"
#include <sys/time.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
char title[80]; /* ``pr'' title */
FILE *cfp; /* control file */
int pfd; /* printer file descriptor */
int ofd; /* output filter file descriptor */
int lfd; /* lock file descriptor */
int pid; /* pid of lpd process */
int prchild; /* id of pr process */
int child; /* id of any filters */
int ofilter; /* id of output filter, if any */
int tof; /* true if at top of form */
int remote; /* true if sending files to remote */
dev_t fdev; /* device of file pointed to by symlink */
ino_t fino; /* inode of file pointed to by symlink */
char fromhost[64]; /* user's host machine */
char logname[32]; /* user's login name */
char jobname[100]; /* job or file name */
char class[32]; /* classification field */
char width[10] = "-w"; /* page width in characters */
char length[10] = "-l"; /* page length in lines */
char pxwidth[10] = "-x"; /* page width in pixels */
char pxlength[10] = "-y"; /* page length in pixels */
char indent[10] = "-i0"; /* indentation size in characters */
char tmpfile[] = "errsXXXXXX"; /* file name for filter output */
printjob()
{
struct stat stb;
register struct queue *q, **qp;
struct queue **queue;
register int i, nitems;
long pidoff;
int count = 0;
extern int abortpr();
init(); /* set up capabilities */
(void) write(1, "", 1); /* ack that daemon is started */
(void) close(2); /* set up log file */
if (open(LF, O_WRONLY|O_APPEND, 0664) < 0) {
syslog(LOG_ERR, "%s: %m", LF);
(void) open("/dev/null", 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(tmpfile);
/*
* 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 & 0100))
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 deamon present */
exit(0);
syslog(LOG_ERR, "%s: %s: %m", printer, LO);
exit(1);
}
ftruncate(lfd, 0L);
/*
* 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", printer, LO);
exit(1);
}
/*
* 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 & 01) { /* reset queue flag */
if (fchmod(lfd, stb.st_mode & 0776) < 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;
restart:
(void) lseek(lfd, (off_t)pidoff, 0);
(void) sprintf(line, "%s\n", q->q_name);
i = strlen(line);
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 & 0100)
goto done;
/* rebuild queue (after lpc topq) */
if (stb.st_mode & 01) {
for (free((char *) q); nitems--; free((char *) q))
q = *qp++;
if (fchmod(lfd, stb.st_mode & 0776) < 0)
syslog(LOG_WARNING, "%s: %s: %m",
printer, LO);
break;
}
}
if (i == OK) /* file ok and printed */
count++;
else if (i == REPRINT) { /* try reprinting the job */
syslog(LOG_INFO, "restarting %s", printer);
if (ofilter > 0) {
kill(ofilter, SIGCONT); /* to be sure */
(void) close(ofd);
while ((i = wait(0)) > 0 && i != ofilter)
;
ofilter = 0;
}
(void) close(pfd); /* close printer */
if (ftruncate(lfd, (off_t)pidoff) < 0)
syslog(LOG_WARNING, "%s: %s: %m", printer, LO);
openpr(); /* try to reopen printer */
goto restart;
}
}
free((char *) queue);
/*
* 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(tmpfile);
exit(0);
}
goto again;
}
char fonts[4][50]; /* fonts for troff */
char *ifonts[4] = {
"/usr/share/vfont/R",
"/usr/share/vfont/I",
"/usr/share/vfont/B",
"/usr/share/vfont/S"
};
/*
* The remaining part is the reading of the control file (cf)
* and performing the various actions.
*/
printit(file)
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", printer, file);
return(OK);
}
/*
* Reset troff fonts.
*/
for (i = 0; i < 4; i++)
strcpy(fonts[i], ifonts[i]);
sprintf(width+2, "%d", PW);
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
* 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':
strcpy(fromhost, line+1);
if (class[0] == '\0')
strncpy(class, line+1, sizeof(class)-1);
continue;
case 'P':
strncpy(logname, line+1, sizeof(logname)-1);
if (RS) { /* restricted */
if (getpwnam(logname) == (struct passwd *)0) {
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')
strncpy(jobname, line+1, sizeof(jobname)-1);
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));
continue;
case 'T': /* header title for pr */
strncpy(title, line+1, sizeof(title)-1);
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')
strcpy(fonts[line[0]-'1'], line+1);
continue;
case 'W': /* page width */
strncpy(width+2, line+1, sizeof(width)-3);
continue;
case 'I': /* indent amount */
strncpy(indent+2, line+1, sizeof(indent)-3);
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':
continue;
}
/* pass 2 */
pass2:
fseek(cfp, 0L, 0);
while (getline(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':
(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.
*/
print(format, file)
int format;
char *file;
{
register int n;
register char *prog;
int fi, fo;
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 (!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 = 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 */
for (n = 3; n < NOFILE; n++)
(void) close(n);
execl(PR, "pr", width, length, "-h", *title ? title : " ", 0);
syslog(LOG_ERR, "cannot execl %s", 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 = IF;
av[1] = width;
av[2] = length;
av[3] = indent;
n = 4;
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, "/usr/share/vfont/",17);
(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 ((av[0] = rindex(prog, '/')) != NULL)
av[0]++;
else
av[0] = prog;
av[n++] = "-n";
av[n++] = logname;
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 ((pid = wait3(&status, WUNTRACED, 0)) > 0 && pid != ofilter)
;
if (status.w_stopval != WSTOPPED) {
(void) close(fi);
syslog(LOG_WARNING, "%s: output filter died (%d)",
printer, status.w_retcode);
return(REPRINT);
}
stopped++;
}
start:
if ((child = dofork(DORETURN)) == 0) { /* child */
dup2(fi, 0);
dup2(fo, 1);
n = open(tmpfile, O_WRONLY|O_CREAT|O_TRUNC, 0664);
if (n >= 0)
dup2(n, 2);
for (n = 3; n < NOFILE; n++)
(void) close(n);
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(&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);
}
}
tof = 0;
if (!WIFEXITED(status)) {
syslog(LOG_WARNING, "%s: Daemon filter '%c' terminated (%d)",
printer, format, status.w_termsig);
return(ERROR);
}
switch (status.w_retcode) {
case 0:
tof = 1;
return(OK);
case 1:
return(REPRINT);
default:
syslog(LOG_WARNING, "%s: Daemon filter '%c' exited (%d)",
printer, format, status.w_retcode);
case 2:
return(ERROR);
}
}
/*
* 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.
*/
sendit(file)
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;
continue;
}
if (line[0] >= 'a' && line[0] <= 'z') {
strcpy(last, line);
while (i = getline(cfp))
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);
case ERROR:
err = ERROR;
}
break;
}
}
if (err == OK && sendfile('\2', file) > 0) {
(void) fclose(cfp);
return(REPRINT);
}
/*
* pass 2
*/
fseek(cfp, 0L, 0);
while (getline(cfp))
if (line[0] == 'U')
(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.
*/
sendfile(type, file)
char type, *file;
{
register int f, amt;
long i;
struct stat stb;
char buf[BUFSIZ];
int sizerr, resp;
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);
(void) sprintf(buf, "%c%ld %s\n", type, stb.st_size, file);
amt = strlen(buf);
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)
status("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)
status("sending to %s", RM);
sizerr = 0;
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);
return(REPRINT);
}
}
(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.
*/
response()
{
char resp;
if (read(pfd, &resp, 1) != 1) {
syslog(LOG_INFO, "%s: lost connection", printer);
return(-1);
}
return(resp);
}
/*
* Banner printing stuff
*/
banner(name1, name2)
char *name1, *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;
}
char *
scnline(key, p, c)
register char key, *p;
char c;
{
register scnwidth;
for (scnwidth = WIDTH; --scnwidth;) {
key <<= 1;
*p++ = key & 0200 ? c : BACKGND;
}
return (p);
}
#define TRC(q) (((q)-' ')&0177)
scan_out(scfd, scsp, dlm)
int scfd;
char *scsp, dlm;
{
register char *strp;
register nchrs, j;
char outbuf[LINELEN+1], *sp, c, cc;
int d, scnhgt;
extern 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[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);
}
}
dropit(c)
char 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
*/
sendmail(user, bombed)
char *user;
int bombed;
{
register int i;
int p[2], s;
register char *cp;
char buf[100];
struct stat stb;
FILE *fp;
pipe(p);
if ((s = dofork(DORETURN)) == 0) { /* child */
dup2(p[0], 0);
for (i = 3; i < NOFILE; i++)
(void) close(i);
if ((cp = rindex(_PATH_SENDMAIL, '/')) != NULL)
cp++;
else
cp = _PATH_SENDMAIL;
sprintf(buf, "%s@%s", user, fromhost);
execl(_PATH_SENDMAIL, cp, buf, 0);
exit(0);
} else if (s > 0) { /* parent */
dup2(p[1], 1);
printf("To: %s@%s\n", user, fromhost);
printf("Subject: printer job\n\n");
printf("Your printer job ");
if (*jobname)
printf("(%s) ", jobname);
switch (bombed) {
case OK:
printf("\ncompleted successfully\n");
break;
default:
case FATALERR:
printf("\ncould not be printed\n");
break;
case NOACCT:
printf("\ncould not be printed without an account on %s\n", host);
break;
case FILTERERR:
if (stat(tmpfile, &stb) < 0 || stb.st_size == 0 ||
(fp = fopen(tmpfile, "r")) == NULL) {
printf("\nwas printed but had some errors\n");
break;
}
printf("\nwas printed but had the following errors:\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");
}
fflush(stdout);
(void) close(1);
}
(void) close(p[0]);
(void) close(p[1]);
wait(&s);
}
/*
* dofork - fork with retries on failure
*/
dofork(action)
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(DU);
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.
*/
abortpr()
{
(void) unlink(tmpfile);
kill(0, SIGINT);
if (ofilter > 0)
kill(ofilter, SIGCONT);
while (wait(0) > 0)
;
exit(0);
}
init()
{
int status;
if ((status = pgetent(line, printer)) < 0) {
syslog(LOG_ERR, "can't open printer description file");
exit(1);
} else if (status == 0) {
syslog(LOG_ERR, "unknown printer: %s", printer);
exit(1);
}
if ((LP = pgetstr("lp", &bp)) == NULL)
LP = DEFDEVLP;
if ((RP = pgetstr("rp", &bp)) == NULL)
RP = DEFLP;
if ((LO = pgetstr("lo", &bp)) == NULL)
LO = DEFLOCK;
if ((ST = pgetstr("st", &bp)) == NULL)
ST = DEFSTAT;
if ((LF = pgetstr("lf", &bp)) == NULL)
LF = DEFLOGF;
if ((SD = pgetstr("sd", &bp)) == NULL)
SD = DEFSPOOL;
if ((DU = pgetnum("du")) < 0)
DU = DEFUID;
if ((FF = pgetstr("ff", &bp)) == NULL)
FF = DEFFF;
if ((PW = pgetnum("pw")) < 0)
PW = DEFWIDTH;
sprintf(&width[2], "%d", PW);
if ((PL = pgetnum("pl")) < 0)
PL = DEFLENGTH;
sprintf(&length[2], "%d", PL);
if ((PX = pgetnum("px")) < 0)
PX = 0;
sprintf(&pxwidth[2], "%d", PX);
if ((PY = pgetnum("py")) < 0)
PY = 0;
sprintf(&pxlength[2], "%d", PY);
RM = pgetstr("rm", &bp);
/*
* Figure out whether the local machine is the same as the remote
* machine entry (if it exists). If not, then ignore the local
* queue information.
*/
if (RM != (char *) NULL) {
char name[256];
struct hostent *hp;
/* get the standard network name of the local host */
gethostname(name, sizeof(name));
name[sizeof(name)-1] = '\0';
hp = gethostbyname(name);
if (hp == (struct hostent *) NULL) {
syslog(LOG_ERR,
"unable to get network name for local machine %s",
name);
goto localcheck_done;
} else strcpy(name, hp->h_name);
/* get the standard network name of RM */
hp = gethostbyname(RM);
if (hp == (struct hostent *) NULL) {
syslog(LOG_ERR,
"unable to get hostname for remote machine %s", RM);
goto localcheck_done;
}
/* if printer is not on local machine, ignore LP */
if (strcmp(name, hp->h_name) != 0) *LP = '\0';
}
localcheck_done:
AF = pgetstr("af", &bp);
OF = pgetstr("of", &bp);
IF = pgetstr("if", &bp);
RF = pgetstr("rf", &bp);
TF = pgetstr("tf", &bp);
NF = pgetstr("nf", &bp);
DF = pgetstr("df", &bp);
GF = pgetstr("gf", &bp);
VF = pgetstr("vf", &bp);
CF = pgetstr("cf", &bp);
TR = pgetstr("tr", &bp);
RS = pgetflag("rs");
SF = pgetflag("sf");
SH = pgetflag("sh");
SB = pgetflag("sb");
HL = pgetflag("hl");
RW = pgetflag("rw");
BR = pgetnum("br");
if ((FC = pgetnum("fc")) < 0)
FC = 0;
if ((FS = pgetnum("fs")) < 0)
FS = 0;
if ((XC = pgetnum("xc")) < 0)
XC = 0;
if ((XS = pgetnum("xs")) < 0)
XS = 0;
tof = !pgetflag("fo");
}
/*
* Acquire line printer or remote connection.
*/
openpr()
{
register int i, n;
int resp;
if (*LP) {
for (i = 1; ; i = i < 32 ? i << 1 : i) {
pfd = open(LP, RW ? O_RDWR : O_WRONLY);
if (pfd >= 0)
break;
if (errno == ENOENT) {
syslog(LOG_ERR, "%s: %m", LP);
exit(1);
}
if (i == 1)
status("waiting for %s to become ready (offline ?)", printer);
sleep(i);
}
if (isatty(pfd))
setty();
status("%s is ready and printing", printer);
} else if (RM != NULL) {
for (i = 1; ; i = i < 256 ? i << 1 : i) {
resp = -1;
pfd = getport(RM);
if (pfd >= 0) {
(void) sprintf(line, "\2%s\n", RP);
n = strlen(line);
if (write(pfd, line, n) == n &&
(resp = response()) == '\0')
break;
(void) close(pfd);
}
if (i == 1) {
if (resp < 0)
status("waiting for %s to come up", RM);
else {
status("waiting for queue to be enabled on %s", RM);
i = 256;
}
}
sleep(i);
}
status("sending to %s", RM);
remote = 1;
} else {
syslog(LOG_ERR, "%s: no line printer device or host name",
printer);
exit(1);
}
/*
* Start up an output filter, if needed.
*/
if (OF) {
int p[2];
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 */
for (i = 3; i < NOFILE; i++)
(void) close(i);
if ((cp = rindex(OF, '/')) == NULL)
cp = OF;
else
cp++;
execl(OF, cp, width, length, 0);
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;
}
}
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, EXTA,
38400, EXTB,
0, 0
};
/*
* setup tty lines.
*/
setty()
{
struct sgttyb ttybuf;
register struct bauds *bp;
if (ioctl(pfd, TIOCEXCL, (char *)0) < 0) {
syslog(LOG_ERR, "%s: ioctl(TIOCEXCL): %m", printer);
exit(1);
}
if (ioctl(pfd, TIOCGETP, (char *)&ttybuf) < 0) {
syslog(LOG_ERR, "%s: ioctl(TIOCGETP): %m", printer);
exit(1);
}
if (BR > 0) {
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);
}
ttybuf.sg_ispeed = ttybuf.sg_ospeed = bp->speed;
}
ttybuf.sg_flags &= ~FC;
ttybuf.sg_flags |= FS;
if (ioctl(pfd, TIOCSETP, (char *)&ttybuf) < 0) {
syslog(LOG_ERR, "%s: ioctl(TIOCSETP): %m", printer);
exit(1);
}
if (XC || XS) {
int ldisc = NTTYDISC;
if (ioctl(pfd, TIOCSETD, &ldisc) < 0) {
syslog(LOG_ERR, "%s: ioctl(TIOCSETD): %m", printer);
exit(1);
}
}
if (XC) {
if (ioctl(pfd, TIOCLBIC, &XC) < 0) {
syslog(LOG_ERR, "%s: ioctl(TIOCLBIC): %m", printer);
exit(1);
}
}
if (XS) {
if (ioctl(pfd, TIOCLBIS, &XS) < 0) {
syslog(LOG_ERR, "%s: ioctl(TIOCLBIS): %m", printer);
exit(1);
}
}
}
/*VARARGS1*/
status(msg, a1, a2, a3)
char *msg;
{
register int fd;
char buf[BUFSIZ];
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, 0L);
sprintf(buf, msg, a1, a2, a3);
strcat(buf, "\n");
(void) write(fd, buf, strlen(buf));
(void) close(fd);
}