freebsd-dev/usr.sbin/lpr/lpc/cmds.c
Eitan Adler 1d1d4a4727 Check the return error of set[ug]id. While this can never fail in the
current version of FreeBSD, this isn't guarenteed by the API.  Custom
security modules, or future implementations of the setuid and setgid
may fail.

PR:		bin/172289
PR:		bin/172290
PR:		bin/172291
Submittud by:	Erik Cederstrand <erik@cederstrand.dk>
Discussed by:	freebsd-security
Approved by:	cperciva
MFC after:	1 week
2012-10-22 03:31:22 +00:00

1331 lines
31 KiB
C

/*
* 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.
* 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 */
#if 0
#ifndef lint
static char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/28/95";
#endif /* not lint */
#endif
#include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */
__FBSDID("$FreeBSD$");
/*
* lpc -- line printer control program -- commands:
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <signal.h>
#include <fcntl.h>
#include <err.h>
#include <errno.h>
#include <dirent.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "lp.h"
#include "lp.local.h"
#include "lpc.h"
#include "extern.h"
#include "pathnames.h"
/*
* Return values from kill_qtask().
*/
#define KQT_LFERROR -2
#define KQT_KILLFAIL -1
#define KQT_NODAEMON 0
#define KQT_KILLOK 1
static char *args2line(int argc, char **argv);
static int doarg(char *_job);
static int doselect(const struct dirent *_d);
static int kill_qtask(const char *lf);
static int sortq(const struct dirent **a, const struct dirent **b);
static int touch(struct jobqueue *_jq);
static void unlinkf(char *_name);
static void upstat(struct printer *_pp, const char *_msg, int _notify);
static void wrapup_clean(int _laststatus);
/*
* generic framework for commands which operate on all or a specified
* set of printers
*/
enum qsel_val { /* how a given ptr was selected */
QSEL_UNKNOWN = -1, /* ... not selected yet */
QSEL_BYNAME = 0, /* ... user specifed it by name */
QSEL_ALL = 1 /* ... user wants "all" printers */
/* (with more to come) */
};
static enum qsel_val generic_qselect; /* indicates how ptr was selected */
static int generic_initerr; /* result of initrtn processing */
static char *generic_cmdname;
static char *generic_msg; /* if a -msg was specified */
static char *generic_nullarg;
static void (*generic_wrapup)(int _last_status); /* perform rtn wrap-up */
void
generic(void (*specificrtn)(struct printer *_pp), int cmdopts,
void (*initrtn)(int _argc, char *_argv[]), int argc, char *argv[])
{
int cmdstatus, more, targc;
struct printer myprinter, *pp;
char **margv, **targv;
if (argc == 1) {
/*
* Usage needs a special case for 'down': The user must
* either include `-msg', or only the first parameter
* that they give will be processed as a printer name.
*/
printf("usage: %s {all | printer ...}", argv[0]);
if (strcmp(argv[0], "down") == 0) {
printf(" -msg [<text> ...]\n");
printf(" or: down {all | printer} [<text> ...]");
} else if (cmdopts & LPC_MSGOPT)
printf(" [-msg <text> ...]");
printf("\n");
return;
}
/* The first argument is the command name. */
generic_cmdname = *argv++;
argc--;
/*
* The initialization routine for a command might set a generic
* "wrapup" routine, which should be called after processing all
* the printers in the command. This might print summary info.
*
* Note that the initialization routine may also parse (and
* nullify) some of the parameters given on the command, leaving
* only the parameters which have to do with printer names.
*/
pp = &myprinter;
generic_wrapup = NULL;
generic_qselect = QSEL_UNKNOWN;
cmdstatus = 0;
/* this just needs to be a distinct value of type 'char *' */
if (generic_nullarg == NULL)
generic_nullarg = strdup("");
/*
* Some commands accept a -msg argument, which indicates that
* all remaining arguments should be combined into a string.
*/
generic_msg = NULL;
if (cmdopts & LPC_MSGOPT) {
targc = argc;
targv = argv;
for (; targc > 0; targc--, targv++) {
if (strcmp(*targv, "-msg") == 0) {
argc -= targc;
generic_msg = args2line(targc - 1, targv + 1);
break;
}
}
if (argc < 1) {
printf("error: No printer name(s) specified before"
" '-msg'.\n");
printf("usage: %s {all | printer ...}",
generic_cmdname);
printf(" [-msg <text> ...]\n");
return;
}
}
/* call initialization routine, if there is one for this cmd */
if (initrtn != NULL) {
generic_initerr = 0;
(*initrtn)(argc, argv);
if (generic_initerr)
return;
/*
* The initrtn may have null'ed out some of the parameters.
* Compact the parameter list to remove those nulls, and
* correct the arg-count.
*/
targc = argc;
targv = argv;
margv = argv;
argc = 0;
for (; targc > 0; targc--, targv++) {
if (*targv != generic_nullarg) {
if (targv != margv)
*margv = *targv;
margv++;
argc++;
}
}
}
if (argc == 1 && strcmp(*argv, "all") == 0) {
generic_qselect = QSEL_ALL;
more = firstprinter(pp, &cmdstatus);
if (cmdstatus)
goto looperr;
while (more) {
(*specificrtn)(pp);
do {
more = nextprinter(pp, &cmdstatus);
looperr:
switch (cmdstatus) {
case PCAPERR_TCOPEN:
printf("warning: %s: unresolved "
"tc= reference(s) ",
pp->printer);
case PCAPERR_SUCCESS:
break;
default:
fatal(pp, "%s", pcaperr(cmdstatus));
}
} while (more && cmdstatus);
}
goto wrapup;
}
generic_qselect = QSEL_BYNAME; /* specifically-named ptrs */
for (; argc > 0; argc--, argv++) {
init_printer(pp);
cmdstatus = getprintcap(*argv, pp);
switch (cmdstatus) {
default:
fatal(pp, "%s", pcaperr(cmdstatus));
case PCAPERR_NOTFOUND:
printf("unknown printer %s\n", *argv);
continue;
case PCAPERR_TCOPEN:
printf("warning: %s: unresolved tc= reference(s)\n",
*argv);
break;
case PCAPERR_SUCCESS:
break;
}
(*specificrtn)(pp);
}
wrapup:
if (generic_wrapup) {
(*generic_wrapup)(cmdstatus);
}
free_printer(pp);
if (generic_msg)
free(generic_msg);
}
/*
* Convert an argv-array of character strings into a single string.
*/
static char *
args2line(int argc, char **argv)
{
char *cp1, *cend;
const char *cp2;
char buf[1024];
if (argc <= 0)
return strdup("\n");
cp1 = buf;
cend = buf + sizeof(buf) - 1; /* save room for '\0' */
while (--argc >= 0) {
cp2 = *argv++;
while ((cp1 < cend) && (*cp1++ = *cp2++))
;
cp1[-1] = ' ';
}
cp1[-1] = '\n';
*cp1 = '\0';
return strdup(buf);
}
/*
* Kill the current daemon, to stop printing of the active job.
*/
static int
kill_qtask(const char *lf)
{
FILE *fp;
pid_t pid;
int errsav, killres, lockres, res;
PRIV_START
fp = fopen(lf, "r");
errsav = errno;
PRIV_END
res = KQT_NODAEMON;
if (fp == NULL) {
/*
* If there is no lock file, then there is no daemon to
* kill. Any other error return means there is some
* kind of problem with the lock file.
*/
if (errsav != ENOENT)
res = KQT_LFERROR;
goto killdone;
}
/* If the lock file is empty, then there is no daemon to kill */
if (getline(fp) == 0)
goto killdone;
/*
* If the file can be locked without blocking, then there
* no daemon to kill, or we should not try to kill it.
*
* XXX - not sure I understand the reasoning behind this...
*/
lockres = flock(fileno(fp), LOCK_SH|LOCK_NB);
(void) fclose(fp);
if (lockres == 0)
goto killdone;
pid = atoi(line);
if (pid < 0) {
/*
* If we got a negative pid, then the contents of the
* lock file is not valid.
*/
res = KQT_LFERROR;
goto killdone;
}
PRIV_END
killres = kill(pid, SIGTERM);
errsav = errno;
PRIV_END
if (killres == 0) {
res = KQT_KILLOK;
printf("\tdaemon (pid %d) killed\n", pid);
} else if (errno == ESRCH) {
res = KQT_NODAEMON;
} else {
res = KQT_KILLFAIL;
printf("\tWarning: daemon (pid %d) not killed:\n", pid);
printf("\t %s\n", strerror(errsav));
}
killdone:
switch (res) {
case KQT_LFERROR:
printf("\tcannot open lock file: %s\n",
strerror(errsav));
break;
case KQT_NODAEMON:
printf("\tno daemon to abort\n");
break;
case KQT_KILLFAIL:
case KQT_KILLOK:
/* These two already printed messages to the user. */
break;
default:
printf("\t<internal error in kill_qtask>\n");
break;
}
return (res);
}
/*
* Write a message into the status file.
*/
static void
upstat(struct printer *pp, const char *msg, int notifyuser)
{
int fd;
char statfile[MAXPATHLEN];
status_file_name(pp, statfile, sizeof statfile);
umask(0);
PRIV_START
fd = open(statfile, O_WRONLY|O_CREAT|O_EXLOCK, STAT_FILE_MODE);
PRIV_END
if (fd < 0) {
printf("\tcannot create status file: %s\n", strerror(errno));
return;
}
(void) ftruncate(fd, 0);
if (msg == NULL)
(void) write(fd, "\n", 1);
else
(void) write(fd, msg, strlen(msg));
(void) close(fd);
if (notifyuser) {
if ((msg == (char *)NULL) || (strcmp(msg, "\n") == 0))
printf("\tstatus message is now set to nothing.\n");
else
printf("\tstatus message is now: %s", msg);
}
}
/*
* kill an existing daemon and disable printing.
*/
void
abort_q(struct printer *pp)
{
int killres, setres;
char lf[MAXPATHLEN];
lock_file_name(pp, lf, sizeof lf);
printf("%s:\n", pp->printer);
/*
* Turn on the owner execute bit of the lock file to disable printing.
*/
setres = set_qstate(SQS_STOPP, lf);
/*
* If set_qstate found that there already was a lock file, then
* call a routine which will read that lock file and kill the
* lpd-process which is listed in that lock file. If the lock
* file did not exist, then either there is no daemon running
* for this queue, or there is one running but *it* could not
* write a lock file (which means we can not determine the
* process id of that lpd-process).
*/
switch (setres) {
case SQS_CHGOK:
case SQS_CHGFAIL:
/* Kill the process */
killres = kill_qtask(lf);
break;
case SQS_CREOK:
case SQS_CREFAIL:
printf("\tno daemon to abort\n");
break;
case SQS_STATFAIL:
printf("\tassuming no daemon to abort\n");
break;
default:
printf("\t<unexpected result (%d) from set_qstate>\n",
setres);
break;
}
if (setres >= 0)
upstat(pp, "printing disabled\n", 0);
}
/*
* "global" variables for all the routines related to 'clean' and 'tclean'
*/
static time_t cln_now; /* current time */
static double cln_minage; /* minimum age before file is removed */
static long cln_sizecnt; /* amount of space freed up */
static int cln_debug; /* print extra debugging msgs */
static int cln_filecnt; /* number of files destroyed */
static int cln_foundcore; /* found a core file! */
static int cln_queuecnt; /* number of queues checked */
static int cln_testonly; /* remove-files vs just-print-info */
static int
doselect(const struct dirent *d)
{
int c = d->d_name[0];
if ((c == 'c' || c == 'd' || c == 'r' || c == 't') &&
d->d_name[1] == 'f')
return 1;
if (c == 'c') {
if (!strcmp(d->d_name, "core"))
cln_foundcore = 1;
}
if (c == 'e') {
if (!strncmp(d->d_name, "errs.", 5))
return 1;
}
return 0;
}
/*
* Comparison routine that clean_q() uses for scandir.
*
* The purpose of this sort is to have all `df' files end up immediately
* after the matching `cf' file. For files matching `cf', `df', `rf', or
* `tf', it sorts by job number and machine, then by `cf', `df', `rf', or
* `tf', and then by the sequence letter (which is A-Z, or a-z). This
* routine may also see filenames which do not start with `cf', `df', `rf',
* or `tf' (such as `errs.*'), and those are simply sorted by the full
* filename.
*
* XXX
* This assumes that all control files start with `cfA*', and it turns
* out there are a few implementations of lpr which will create `cfB*'
* filenames (they will have datafile names which start with `dfB*').
*/
static int
sortq(const struct dirent **a, const struct dirent **b)
{
const int a_lt_b = -1, a_gt_b = 1, cat_other = 10;
const char *fname_a, *fname_b, *jnum_a, *jnum_b;
int cat_a, cat_b, ch, res, seq_a, seq_b;
fname_a = (*a)->d_name;
fname_b = (*b)->d_name;
/*
* First separate filenames into categories. Categories are
* legitimate `cf', `df', `rf' & `tf' filenames, and "other" - in
* that order. It is critical that the mapping be exactly the
* same for 'a' vs 'b', so define a macro for the job.
*
* [aside: the standard `cf' file has the jobnumber start in
* position 4, but some implementations have that as an extra
* file-sequence letter, and start the job number in position 5.]
*/
#define MAP_TO_CAT(fname_X,cat_X,jnum_X,seq_X) do { \
cat_X = cat_other; \
ch = *(fname_X + 2); \
jnum_X = fname_X + 3; \
seq_X = 0; \
if ((*(fname_X + 1) == 'f') && (isalpha(ch))) { \
seq_X = ch; \
if (*fname_X == 'c') \
cat_X = 1; \
else if (*fname_X == 'd') \
cat_X = 2; \
else if (*fname_X == 'r') \
cat_X = 3; \
else if (*fname_X == 't') \
cat_X = 4; \
if (cat_X != cat_other) { \
ch = *jnum_X; \
if (!isdigit(ch)) { \
if (isalpha(ch)) { \
jnum_X++; \
ch = *jnum_X; \
seq_X = (seq_X << 8) + ch; \
} \
if (!isdigit(ch)) \
cat_X = cat_other; \
} \
} \
} \
} while (0)
MAP_TO_CAT(fname_a, cat_a, jnum_a, seq_a);
MAP_TO_CAT(fname_b, cat_b, jnum_b, seq_b);
#undef MAP_TO_CAT
/* First handle all cases which have "other" files */
if ((cat_a >= cat_other) || (cat_b >= cat_other)) {
/* for two "other" files, just compare the full name */
if (cat_a == cat_b)
res = strcmp(fname_a, fname_b);
else if (cat_a < cat_b)
res = a_lt_b;
else
res = a_gt_b;
goto have_res;
}
/*
* At this point, we know both files are legitimate `cf', `df', `rf',
* or `tf' files. Compare them by job-number and machine name.
*/
res = strcmp(jnum_a, jnum_b);
if (res != 0)
goto have_res;
/*
* We have two files which belong to the same job. Sort based
* on the category of file (`c' before `d', etc).
*/
if (cat_a < cat_b) {
res = a_lt_b;
goto have_res;
} else if (cat_a > cat_b) {
res = a_gt_b;
goto have_res;
}
/*
* Two files in the same category for a single job. Sort based
* on the sequence letter(s). (usually `A' through `Z', etc).
*/
if (seq_a < seq_b) {
res = a_lt_b;
goto have_res;
} else if (seq_a > seq_b) {
res = a_gt_b;
goto have_res;
}
/*
* Given that the filenames in a directory are unique, this SHOULD
* never happen (unless there are logic errors in this routine).
* But if it does happen, we must return "is equal" or the caller
* might see inconsistent results in the sorting order, and that
* can trigger other problems.
*/
printf("\t*** Error in sortq: %s == %s !\n", fname_a, fname_b);
printf("\t*** cat %d == %d ; seq = %d %d\n", cat_a, cat_b,
seq_a, seq_b);
res = 0;
have_res:
return res;
}
/*
* Remove all spool files and temporaries from the spooling area.
* Or, perhaps:
* Remove incomplete jobs from spooling area.
*/
void
clean_gi(int argc, char *argv[])
{
/* init some fields before 'clean' is called for each queue */
cln_queuecnt = 0;
cln_now = time(NULL);
cln_minage = 3600.0; /* only delete files >1h old */
cln_filecnt = 0;
cln_sizecnt = 0;
cln_debug = 0;
cln_testonly = 0;
generic_wrapup = &wrapup_clean;
/* see if there are any options specified before the ptr list */
for (; argc > 0; argc--, argv++) {
if (**argv != '-')
break;
if (strcmp(*argv, "-d") == 0) {
/* just an example of an option... */
cln_debug++;
*argv = generic_nullarg; /* "erase" it */
} else {
printf("Invalid option '%s'\n", *argv);
generic_initerr = 1;
}
}
return;
}
void
tclean_gi(int argc, char *argv[])
{
/* only difference between 'clean' and 'tclean' is one value */
/* (...and the fact that 'clean' is priv and 'tclean' is not) */
clean_gi(argc, argv);
cln_testonly = 1;
return;
}
void
clean_q(struct printer *pp)
{
char *cp, *cp1, *lp;
struct dirent **queue;
size_t linerem;
int didhead, i, n, nitems, rmcp;
cln_queuecnt++;
didhead = 0;
if (generic_qselect == QSEL_BYNAME) {
printf("%s:\n", pp->printer);
didhead = 1;
}
lp = line;
cp = pp->spool_dir;
while (lp < &line[sizeof(line) - 1]) {
if ((*lp++ = *cp++) == 0)
break;
}
lp[-1] = '/';
linerem = sizeof(line) - (lp - line);
cln_foundcore = 0;
PRIV_START
nitems = scandir(pp->spool_dir, &queue, doselect, sortq);
PRIV_END
if (nitems < 0) {
if (!didhead) {
printf("%s:\n", pp->printer);
didhead = 1;
}
printf("\tcannot examine spool directory\n");
return;
}
if (cln_foundcore) {
if (!didhead) {
printf("%s:\n", pp->printer);
didhead = 1;
}
printf("\t** found a core file in %s !\n", pp->spool_dir);
}
if (nitems == 0)
return;
if (!didhead)
printf("%s:\n", pp->printer);
if (cln_debug) {
printf("\t** ----- Sorted list of files being checked:\n");
i = 0;
do {
cp = queue[i]->d_name;
printf("\t** [%3d] = %s\n", i, cp);
} while (++i < nitems);
printf("\t** ----- end of sorted list\n");
}
i = 0;
do {
cp = queue[i]->d_name;
rmcp = 0;
if (*cp == 'c') {
/*
* A control file. Look for matching data-files.
*/
/* XXX
* Note the logic here assumes that the hostname
* part of cf-filenames match the hostname part
* in df-filenames, and that is not necessarily
* true (eg: for multi-homed hosts). This needs
* some further thought...
*/
n = 0;
while (i + 1 < nitems) {
cp1 = queue[i + 1]->d_name;
if (*cp1 != 'd' || strcmp(cp + 3, cp1 + 3))
break;
i++;
n++;
}
if (n == 0) {
rmcp = 1;
}
} else if (*cp == 'e') {
/*
* Must be an errrs or email temp file.
*/
rmcp = 1;
} else {
/*
* Must be a df with no cf (otherwise, it would have
* been skipped above) or an rf or tf file (which can
* always be removed if it is old enough).
*/
rmcp = 1;
}
if (rmcp) {
if (strlen(cp) >= linerem) {
printf("\t** internal error: 'line' overflow!\n");
printf("\t** spooldir = %s\n", pp->spool_dir);
printf("\t** cp = %s\n", cp);
return;
}
strlcpy(lp, cp, linerem);
unlinkf(line);
}
} while (++i < nitems);
}
static void
wrapup_clean(int laststatus __unused)
{
printf("Checked %d queues, and ", cln_queuecnt);
if (cln_filecnt < 1) {
printf("no cruft was found\n");
return;
}
if (cln_testonly) {
printf("would have ");
}
printf("removed %d files (%ld bytes).\n", cln_filecnt, cln_sizecnt);
}
static void
unlinkf(char *name)
{
struct stat stbuf;
double agemod, agestat;
int res;
char linkbuf[BUFSIZ];
/*
* We have to use lstat() instead of stat(), in case this is a df*
* "file" which is really a symlink due to 'lpr -s' processing. In
* that case, we need to check the last-mod time of the symlink, and
* not the file that the symlink is pointed at.
*/
PRIV_START
res = lstat(name, &stbuf);
PRIV_END
if (res < 0) {
printf("\terror return from stat(%s):\n", name);
printf("\t %s\n", strerror(errno));
return;
}
agemod = difftime(cln_now, stbuf.st_mtime);
agestat = difftime(cln_now, stbuf.st_ctime);
if (cln_debug > 1) {
/* this debugging-aid probably is not needed any more... */
printf("\t\t modify age=%g secs, stat age=%g secs\n",
agemod, agestat);
}
if ((agemod <= cln_minage) && (agestat <= cln_minage))
return;
/*
* if this file is a symlink, then find out the target of the
* symlink before unlink-ing the file itself
*/
if (S_ISLNK(stbuf.st_mode)) {
PRIV_START
res = readlink(name, linkbuf, sizeof(linkbuf));
PRIV_END
if (res < 0) {
printf("\terror return from readlink(%s):\n", name);
printf("\t %s\n", strerror(errno));
return;
}
if (res == sizeof(linkbuf))
res--;
linkbuf[res] = '\0';
}
cln_filecnt++;
cln_sizecnt += stbuf.st_size;
if (cln_testonly) {
printf("\twould remove %s\n", name);
if (S_ISLNK(stbuf.st_mode)) {
printf("\t (which is a symlink to %s)\n", linkbuf);
}
} else {
PRIV_START
res = unlink(name);
PRIV_END
if (res < 0)
printf("\tcannot remove %s (!)\n", name);
else
printf("\tremoved %s\n", name);
/* XXX
* Note that for a df* file, this code should also check to see
* if it is a symlink to some other file, and if the original
* lpr command included '-r' ("remove file"). Of course, this
* code would not be removing the df* file unless there was no
* matching cf* file, and without the cf* file it is currently
* impossible to determine if '-r' had been specified...
*
* As a result of this quandry, we may be leaving behind a
* user's file that was supposed to have been removed after
* being printed. This may effect services such as CAP or
* samba, if they were configured to use 'lpr -r', and if
* datafiles are not being properly removed.
*/
if (S_ISLNK(stbuf.st_mode)) {
printf("\t (which was a symlink to %s)\n", linkbuf);
}
}
}
/*
* Enable queuing to the printer (allow lpr to add new jobs to the queue).
*/
void
enable_q(struct printer *pp)
{
int setres;
char lf[MAXPATHLEN];
lock_file_name(pp, lf, sizeof lf);
printf("%s:\n", pp->printer);
setres = set_qstate(SQS_ENABLEQ, lf);
}
/*
* Disable queuing.
*/
void
disable_q(struct printer *pp)
{
int setres;
char lf[MAXPATHLEN];
lock_file_name(pp, lf, sizeof lf);
printf("%s:\n", pp->printer);
setres = set_qstate(SQS_DISABLEQ, lf);
}
/*
* Disable queuing and printing and put a message into the status file
* (reason for being down). If the user specified `-msg', then use
* everything after that as the message for the status file. If the
* user did NOT specify `-msg', then the command should take the first
* parameter as the printer name, and all remaining parameters as the
* message for the status file. (This is to be compatible with the
* original definition of 'down', which was implemented long before
* `-msg' was around).
*/
void
down_gi(int argc, char *argv[])
{
/* If `-msg' was specified, then this routine has nothing to do. */
if (generic_msg != NULL)
return;
/*
* If the user only gave one parameter, then use a default msg.
* (if argc == 1 at this point, then *argv == name of printer).
*/
if (argc == 1) {
generic_msg = strdup("printing disabled\n");
return;
}
/*
* The user specified multiple parameters, and did not specify
* `-msg'. Build a message from all the parameters after the
* first one (and nullify those parameters so generic-processing
* will not process them as printer-queue names).
*/
argc--;
argv++;
generic_msg = args2line(argc, argv);
for (; argc > 0; argc--, argv++)
*argv = generic_nullarg; /* "erase" it */
}
void
down_q(struct printer *pp)
{
int setres;
char lf[MAXPATHLEN];
lock_file_name(pp, lf, sizeof lf);
printf("%s:\n", pp->printer);
setres = set_qstate(SQS_DISABLEQ+SQS_STOPP, lf);
if (setres >= 0)
upstat(pp, generic_msg, 1);
}
/*
* Exit lpc
*/
void
quit(int argc __unused, char *argv[] __unused)
{
exit(0);
}
/*
* Kill and restart the daemon.
*/
void
restart_q(struct printer *pp)
{
int killres, setres, startok;
char lf[MAXPATHLEN];
lock_file_name(pp, lf, sizeof lf);
printf("%s:\n", pp->printer);
killres = kill_qtask(lf);
/*
* XXX - if the kill worked, we should probably sleep for
* a second or so before trying to restart the queue.
*/
/* make sure the queue is set to print jobs */
setres = set_qstate(SQS_STARTP, lf);
PRIV_START
startok = startdaemon(pp);
PRIV_END
if (!startok)
printf("\tcouldn't restart daemon\n");
else
printf("\tdaemon restarted\n");
}
/*
* Set the status message of each queue listed. Requires a "-msg"
* parameter to indicate the end of the queue list and start of msg text.
*/
void
setstatus_gi(int argc __unused, char *argv[] __unused)
{
if (generic_msg == NULL) {
printf("You must specify '-msg' before the text of the new status message.\n");
generic_initerr = 1;
}
}
void
setstatus_q(struct printer *pp)
{
struct stat stbuf;
int not_shown;
char lf[MAXPATHLEN];
lock_file_name(pp, lf, sizeof lf);
printf("%s:\n", pp->printer);
upstat(pp, generic_msg, 1);
/*
* Warn the user if 'lpq' will not display this new status-message.
* Note that if lock file does not exist, then the queue is enabled
* for both queuing and printing.
*/
not_shown = 1;
if (stat(lf, &stbuf) >= 0) {
if (stbuf.st_mode & LFM_PRINT_DIS)
not_shown = 0;
}
if (not_shown) {
printf("\tnote: This queue currently has printing enabled,\n");
printf("\t so this -msg will only be shown by 'lpq' if\n");
printf("\t a job is actively printing on it.\n");
}
}
/*
* Enable printing on the specified printer and startup the daemon.
*/
void
start_q(struct printer *pp)
{
int setres, startok;
char lf[MAXPATHLEN];
lock_file_name(pp, lf, sizeof lf);
printf("%s:\n", pp->printer);
setres = set_qstate(SQS_STARTP, lf);
PRIV_START
startok = startdaemon(pp);
PRIV_END
if (!startok)
printf("\tcouldn't start daemon\n");
else
printf("\tdaemon started\n");
PRIV_END
}
/*
* Print the status of the printer queue.
*/
void
status(struct printer *pp)
{
struct stat stbuf;
register int fd, i;
register struct dirent *dp;
DIR *dirp;
char file[MAXPATHLEN];
printf("%s:\n", pp->printer);
lock_file_name(pp, file, sizeof file);
if (stat(file, &stbuf) >= 0) {
printf("\tqueuing is %s\n",
((stbuf.st_mode & LFM_QUEUE_DIS) ? "disabled"
: "enabled"));
printf("\tprinting is %s\n",
((stbuf.st_mode & LFM_PRINT_DIS) ? "disabled"
: "enabled"));
} else {
printf("\tqueuing is enabled\n");
printf("\tprinting is enabled\n");
}
if ((dirp = opendir(pp->spool_dir)) == NULL) {
printf("\tcannot examine spool directory\n");
return;
}
i = 0;
while ((dp = readdir(dirp)) != NULL) {
if (*dp->d_name == 'c' && dp->d_name[1] == 'f')
i++;
}
closedir(dirp);
if (i == 0)
printf("\tno entries in spool area\n");
else if (i == 1)
printf("\t1 entry in spool area\n");
else
printf("\t%d entries in spool area\n", i);
fd = open(file, O_RDONLY);
if (fd < 0 || flock(fd, LOCK_SH|LOCK_NB) == 0) {
(void) close(fd); /* unlocks as well */
printf("\tprinter idle\n");
return;
}
(void) close(fd);
/* print out the contents of the status file, if it exists */
status_file_name(pp, file, sizeof file);
fd = open(file, O_RDONLY|O_SHLOCK);
if (fd >= 0) {
(void) fstat(fd, &stbuf);
if (stbuf.st_size > 0) {
putchar('\t');
while ((i = read(fd, line, sizeof(line))) > 0)
(void) fwrite(line, 1, i, stdout);
}
(void) close(fd); /* unlocks as well */
}
}
/*
* Stop the specified daemon after completing the current job and disable
* printing.
*/
void
stop_q(struct printer *pp)
{
int setres;
char lf[MAXPATHLEN];
lock_file_name(pp, lf, sizeof lf);
printf("%s:\n", pp->printer);
setres = set_qstate(SQS_STOPP, lf);
if (setres >= 0)
upstat(pp, "printing disabled\n", 0);
}
struct jobqueue **queue;
int nitems;
time_t mtime;
/*
* Put the specified jobs at the top of printer queue.
*/
void
topq(int argc, char *argv[])
{
register int i;
struct stat stbuf;
int cmdstatus, changed;
struct printer myprinter, *pp = &myprinter;
if (argc < 3) {
printf("usage: topq printer [jobnum ...] [user ...]\n");
return;
}
--argc;
++argv;
init_printer(pp);
cmdstatus = getprintcap(*argv, pp);
switch(cmdstatus) {
default:
fatal(pp, "%s", pcaperr(cmdstatus));
case PCAPERR_NOTFOUND:
printf("unknown printer %s\n", *argv);
return;
case PCAPERR_TCOPEN:
printf("warning: %s: unresolved tc= reference(s)", *argv);
break;
case PCAPERR_SUCCESS:
break;
}
printf("%s:\n", pp->printer);
PRIV_START
if (chdir(pp->spool_dir) < 0) {
printf("\tcannot chdir to %s\n", pp->spool_dir);
goto out;
}
PRIV_END
nitems = getq(pp, &queue);
if (nitems == 0)
return;
changed = 0;
mtime = queue[0]->job_time;
for (i = argc; --i; ) {
if (doarg(argv[i]) == 0) {
printf("\tjob %s is not in the queue\n", argv[i]);
continue;
} else
changed++;
}
for (i = 0; i < nitems; i++)
free(queue[i]);
free(queue);
if (!changed) {
printf("\tqueue order unchanged\n");
return;
}
/*
* Turn on the public execute bit of the lock file to
* get lpd to rebuild the queue after the current job.
*/
PRIV_START
if (changed && stat(pp->lock_file, &stbuf) >= 0)
(void) chmod(pp->lock_file, stbuf.st_mode | LFM_RESET_QUE);
out:
PRIV_END
}
/*
* Reposition the job by changing the modification time of
* the control file.
*/
static int
touch(struct jobqueue *jq)
{
struct timeval tvp[2];
int ret;
tvp[0].tv_sec = tvp[1].tv_sec = --mtime;
tvp[0].tv_usec = tvp[1].tv_usec = 0;
PRIV_START
ret = utimes(jq->job_cfname, tvp);
PRIV_END
return (ret);
}
/*
* Checks if specified job name is in the printer's queue.
* Returns: negative (-1) if argument name is not in the queue.
*/
static int
doarg(char *job)
{
register struct jobqueue **qq;
register int jobnum, n;
register char *cp, *machine;
int cnt = 0;
FILE *fp;
/*
* Look for a job item consisting of system name, colon, number
* (example: ucbarpa:114)
*/
if ((cp = strchr(job, ':')) != NULL) {
machine = job;
*cp++ = '\0';
job = cp;
} else
machine = NULL;
/*
* Check for job specified by number (example: 112 or 235ucbarpa).
*/
if (isdigit(*job)) {
jobnum = 0;
do
jobnum = jobnum * 10 + (*job++ - '0');
while (isdigit(*job));
for (qq = queue + nitems; --qq >= queue; ) {
n = 0;
for (cp = (*qq)->job_cfname+3; isdigit(*cp); )
n = n * 10 + (*cp++ - '0');
if (jobnum != n)
continue;
if (*job && strcmp(job, cp) != 0)
continue;
if (machine != NULL && strcmp(machine, cp) != 0)
continue;
if (touch(*qq) == 0) {
printf("\tmoved %s\n", (*qq)->job_cfname);
cnt++;
}
}
return(cnt);
}
/*
* Process item consisting of owner's name (example: henry).
*/
for (qq = queue + nitems; --qq >= queue; ) {
PRIV_START
fp = fopen((*qq)->job_cfname, "r");
PRIV_END
if (fp == NULL)
continue;
while (getline(fp) > 0)
if (line[0] == 'P')
break;
(void) fclose(fp);
if (line[0] != 'P' || strcmp(job, line+1) != 0)
continue;
if (touch(*qq) == 0) {
printf("\tmoved %s\n", (*qq)->job_cfname);
cnt++;
}
}
return(cnt);
}
/*
* Enable both queuing & printing, and start printer (undo `down').
*/
void
up_q(struct printer *pp)
{
int setres, startok;
char lf[MAXPATHLEN];
lock_file_name(pp, lf, sizeof lf);
printf("%s:\n", pp->printer);
setres = set_qstate(SQS_ENABLEQ+SQS_STARTP, lf);
PRIV_START
startok = startdaemon(pp);
PRIV_END
if (!startok)
printf("\tcouldn't start daemon\n");
else
printf("\tdaemon started\n");
}