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/* $OpenBSD: lprm.c,v 1.21 2015/01/16 06:40:18 deraadt Exp $ */
/* $$NetBSD: lprm.c,v 1.9 1999/08/16 03:12:32 simonb 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.
*/
/*
* lprm - remove the current user's spool entry
*
* lprm [-] [[job #] [user] ...]
*
* Using information in the lock file, lprm will kill the
* currently active daemon (if necessary), remove the associated files,
* and startup a new daemon. Privileged users may remove anyone's spool
* entries, otherwise one can only remove their own.
*/
#include <ctype.h>
#include <signal.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <pwd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <limits.h>
#include "lp.h"
#include "lp.local.h"
/*
* Stuff for handling job specifications
*/
char *person; /* name of person doing lprm */
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 */
volatile sig_atomic_t gotintr; /* set when we receive SIGINT */
static char luser[LOGIN_NAME_MAX]; /* buffer for person */
static __dead void usage(void);
int
main(int argc, char **argv)
{
struct passwd *pw;
char *cp;
long l;
int ch;
/*
* Simulate setuid daemon w/ PRIV_END called.
* We don't want lpr to actually be setuid daemon since that
* requires that the lpr binary be owned by user daemon, which
* is potentially unsafe.
*/
if ((pw = getpwuid(DEFUID)) == NULL)
errx(1, "daemon uid (%u) not in password file", DEFUID);
effective_uid = pw->pw_uid;
real_uid = getuid();
effective_gid = pw->pw_gid;
real_gid = getgid();
setresgid(real_gid, real_gid, effective_gid);
setresuid(real_uid, real_uid, effective_uid);
gethostname(host, sizeof(host));
openlog("lprm", 0, LOG_LPR);
if ((pw = getpwuid(real_uid)) == NULL)
fatal("Who are you?");
if (strlen(pw->pw_name) >= sizeof(luser))
fatal("Your name is too long");
strlcpy(luser, pw->pw_name, sizeof(luser));
person = luser;
while ((ch = getopt(argc, argv, "P:w:-")) != -1) {
switch (ch) {
case '-':
users = -1;
break;
case 'P':
printer = optarg;
break;
case 'w':
l = strtol(optarg, &cp, 10);
if (*cp != '\0' || l < 0 || l >= INT_MAX)
errx(1, "wait time must be positive integer: %s",
optarg);
wait_time = (u_int)l;
if (wait_time < 30)
warnx("warning: wait time less than 30 seconds");
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
printer = DEFLP;
if (users < 0 && argc != 0)
usage();
while (argc > 0) {
if (isdigit((unsigned char)*argv[0])) {
if (requests >= MAXREQUESTS)
fatal("Too many requests");
requ[requests++] = atoi(argv[0]);
} else {
if (users >= MAXUSERS)
fatal("Too many users");
user[users++] = argv[0];
}
argc--;
argv++;
}
rmjob();
exit(0);
}
static __dead void
usage(void)
{
extern char *__progname;
fprintf(stderr, "usage: %s [-] [-Pprinter] [[job# ...] [user ...]]\n",
__progname);
exit(2);
}
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