1/*	$NetBSD: lprm.c,v 1.18 2007/12/15 19:44:55 perry Exp $	*/
2
3/*
4 * Copyright (c) 1983, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34#ifndef lint
35__COPYRIGHT("@(#) Copyright (c) 1983, 1993\
36 The Regents of the University of California.  All rights reserved.");
37#if 0
38static char sccsid[] = "@(#)lprm.c	8.1 (Berkeley) 6/6/93";
39#else
40__RCSID("$NetBSD: lprm.c,v 1.18 2007/12/15 19:44:55 perry Exp $");
41#endif
42#endif /* not lint */
43
44/*
45 * lprm - remove the current user's spool entry
46 *
47 * lprm [-] [[job #] [user] ...]
48 *
49 * Using information in the lock file, lprm will kill the
50 * currently active daemon (if necessary), remove the associated files,
51 * and startup a new daemon.  Privileged users may remove anyone's spool
52 * entries, otherwise one can only remove their own.
53 */
54
55#include <sys/param.h>
56
57#include <err.h>
58#include <syslog.h>
59#include <dirent.h>
60#include <pwd.h>
61#include <unistd.h>
62#include <stdlib.h>
63#include <stdio.h>
64#include <string.h>
65#include <ctype.h>
66
67#include "lp.h"
68#include "lp.local.h"
69
70/*
71 * Stuff for handling job specifications
72 */
73char	*person;		/* name of person doing lprm */
74int	 requ[MAXREQUESTS];	/* job number of spool entries */
75int	 requests;		/* # of spool requests */
76char	*user[MAXUSERS];	/* users to process */
77int	 users;			/* # of users in user array */
78uid_t	 uid, euid;		/* real and effective user id's */
79
80static char	luser[16];	/* buffer for person */
81
82static void usage(void) __dead;
83
84int
85main(int argc, char *argv[])
86{
87	char *arg;
88	struct passwd *p;
89
90	uid = getuid();
91	euid = geteuid();
92	seteuid(uid);	/* be safe */
93	setprogname(*argv);
94	gethostname(host, sizeof(host));
95	host[sizeof(host) - 1] = '\0';
96	openlog("lpd", 0, LOG_LPR);
97	if ((p = getpwuid(getuid())) == NULL)
98		fatal("Who are you?");
99	if (strlen(p->pw_name) >= sizeof(luser))
100		fatal("Your name is too long");
101	strlcpy(luser, p->pw_name, sizeof(luser));
102	person = luser;
103	while (--argc) {
104		if ((arg = *++argv)[0] == '-')
105			switch (arg[1]) {
106			case 'P':
107				if (arg[2])
108					printer = &arg[2];
109				else if (argc > 1) {
110					argc--;
111					printer = *++argv;
112				}
113				break;
114			case 'w':
115				if (arg[2])
116					wait_time = atoi(&arg[2]);
117				else if (argc > 1) {
118					argc--;
119					wait_time = atoi(*++argv);
120				}
121				if (wait_time < 0)
122					errx(1, "wait time must be positive: %d",
123					    wait_time);
124				if (wait_time < 30)
125				    warnx("warning: wait time less than 30 seconds");
126				break;
127			case '\0':
128				if (!users) {
129					users = -1;
130					break;
131				}
132			default:
133				usage();
134			}
135		else {
136			if (users < 0)
137				usage();
138			if (isdigit((unsigned char)arg[0])) {
139				if (requests >= MAXREQUESTS)
140					fatal("Too many requests");
141				requ[requests++] = atoi(arg);
142			} else {
143				if (users >= MAXUSERS)
144					fatal("Too many users");
145				user[users++] = arg;
146			}
147		}
148	}
149	if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
150		printer = DEFLP;
151
152	rmjob();
153	exit(0);
154}
155
156static void
157usage(void)
158{
159	(void)fprintf(stderr,
160	    "Usage: %s [-] [-Pprinter] [-w maxwait] [[job #] [user] ...]\n",
161	    getprogname());
162	exit(2);
163}
164