freebsd-skq/usr.sbin/lpr/lpq/lpq.c
eadler 4bc19b04c5 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

196 lines
4.9 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[] = "@(#)lpq.c 8.3 (Berkeley) 5/10/95";
#endif /* not lint */
#endif
#include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */
__FBSDID("$FreeBSD$");
/*
* Spool Queue examination program
*
* lpq [-a] [-l] [-Pprinter] [user...] [job...]
*
* -a show all non-null queues on the local machine
* -l long output
* -P used to identify printer as per lpr/lprm
*/
#include <sys/param.h>
#include <ctype.h>
#include <dirent.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <unistd.h>
#include "lp.h"
#include "lp.local.h"
#include "pathnames.h"
int requ[MAXREQUESTS]; /* job number of spool entries */
int requests; /* # of spool requests */
char *user[MAXUSERS]; /* users to process */
int users; /* # of users in user array */
uid_t uid, euid;
static int ckqueue(const struct printer *_pp);
static void usage(void);
int main(int _argc, char **_argv);
int
main(int argc, char **argv)
{
int ch, aflag, lflag;
const char *printer;
struct printer myprinter, *pp = &myprinter;
printer = NULL;
euid = geteuid();
uid = getuid();
PRIV_END
progname = *argv;
if (gethostname(local_host, sizeof(local_host)))
err(1, "gethostname");
openlog("lpd", 0, LOG_LPR);
aflag = lflag = 0;
while ((ch = getopt(argc, argv, "alP:")) != -1)
switch((char)ch) {
case 'a':
++aflag;
break;
case 'l': /* long output */
++lflag;
break;
case 'P': /* printer name */
printer = optarg;
break;
case '?':
default:
usage();
}
if (!aflag && printer == NULL && (printer = getenv("PRINTER")) == NULL)
printer = DEFLP;
for (argc -= optind, argv += optind; argc; --argc, ++argv)
if (isdigit(argv[0][0])) {
if (requests >= MAXREQUESTS)
fatal(0, "too many requests");
requ[requests++] = atoi(*argv);
}
else {
if (users >= MAXUSERS)
fatal(0, "too many users");
user[users++] = *argv;
}
if (aflag) {
int more, status;
more = firstprinter(pp, &status);
if (status)
goto looperr;
while (more) {
if (ckqueue(pp) > 0) {
printf("%s:\n", pp->printer);
displayq(pp, lflag);
printf("\n");
}
do {
more = nextprinter(pp, &status);
looperr:
switch (status) {
case PCAPERR_TCOPEN:
printf("warning: %s: unresolved "
"tc= reference(s) ",
pp->printer);
case PCAPERR_SUCCESS:
break;
default:
fatal(pp, "%s", pcaperr(status));
}
} while (more && status);
}
} else {
int status;
init_printer(pp);
status = getprintcap(printer, pp);
if (status < 0)
fatal(pp, "%s", pcaperr(status));
displayq(pp, lflag);
}
exit(0);
}
static int
ckqueue(const struct printer *pp)
{
register struct dirent *d;
DIR *dirp;
char *spooldir;
spooldir = pp->spool_dir;
if ((dirp = opendir(spooldir)) == NULL)
return (-1);
while ((d = readdir(dirp)) != NULL) {
if (d->d_name[0] != 'c' || d->d_name[1] != 'f')
continue; /* daemon control files only */
closedir(dirp);
return (1); /* found something */
}
closedir(dirp);
return (0);
}
static void
usage(void)
{
fprintf(stderr,
"usage: lpq [-a] [-l] [-Pprinter] [user ...] [job ...]\n");
exit(1);
}