1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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 #ifndef lint
34 static const char copyright[] =
35 "@(#) Copyright (c) 1983, 1993\n\
36 The Regents of the University of California. All rights reserved.\n";
37 #endif /* not lint */
38
39 #if 0
40 #ifndef lint
41 static char sccsid[] = "@(#)lprm.c 8.1 (Berkeley) 6/6/93";
42 #endif /* not lint */
43 #endif
44
45 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */
46 __FBSDID("$FreeBSD: stable/12/usr.sbin/lpr/lprm/lprm.c 326025 2017-11-20 19:49:47Z pfg $");
47
48 /*
49 * lprm - remove the current user's spool entry
50 *
51 * lprm [-] [[job #] [user] ...]
52 *
53 * Using information in the lock file, lprm will kill the
54 * currently active daemon (if necessary), remove the associated files,
55 * and startup a new daemon. Priviledged users may remove anyone's spool
56 * entries, otherwise one can only remove their own.
57 */
58
59 #include <sys/param.h>
60
61 #include <syslog.h>
62 #include <dirent.h>
63 #include <err.h>
64 #include <pwd.h>
65 #include <unistd.h>
66 #include <stdlib.h>
67 #include <stdio.h>
68 #include <string.h>
69 #include <ctype.h>
70 #include "lp.h"
71 #include "lp.local.h"
72
73 /*
74 * Stuff for handling job specifications
75 */
76 char *person; /* name of person doing lprm */
77 int requ[MAXREQUESTS]; /* job number of spool entries */
78 int requests; /* # of spool requests */
79 char *user[MAXUSERS]; /* users to process */
80 int users; /* # of users in user array */
81 uid_t uid, euid; /* real and effective user id's */
82
83 static char luser[16]; /* buffer for person */
84
85 int main(int argc, char *_argv[]);
86 static void usage(void);
87
88 int
main(int argc,char * argv[])89 main(int argc, char *argv[])
90 {
91 char *arg;
92 const char *printer;
93 struct passwd *p;
94 static char root[] = "root";
95
96 printer = NULL;
97 uid = getuid();
98 euid = geteuid();
99 PRIV_END /* be safe */
100 progname = argv[0];
101 gethostname(local_host, sizeof(local_host));
102 openlog("lpd", 0, LOG_LPR);
103
104 /*
105 * Bogus code later checks for string equality between
106 * `person' and "root", so if we are root, better make sure
107 * that code will succeed.
108 */
109 if (getuid() == 0) {
110 person = root;
111 } else if ((person = getlogin()) == NULL) {
112 if ((p = getpwuid(getuid())) == NULL)
113 fatal(0, "Who are you?");
114 if (strlen(p->pw_name) >= sizeof(luser))
115 fatal(0, "Your name is too long");
116 strcpy(luser, p->pw_name);
117 person = luser;
118 }
119 while (--argc) {
120 if ((arg = *++argv)[0] == '-')
121 switch (arg[1]) {
122 case 'P':
123 if (arg[2])
124 printer = &arg[2];
125 else if (argc > 1) {
126 argc--;
127 printer = *++argv;
128 }
129 break;
130 case '\0':
131 if (!users) {
132 users = -1;
133 break;
134 }
135 default:
136 usage();
137 }
138 else {
139 if (users < 0)
140 usage();
141 if (isdigit(arg[0])) {
142 if (requests >= MAXREQUESTS)
143 fatal(0, "Too many requests");
144 requ[requests++] = atoi(arg);
145 } else {
146 if (users >= MAXUSERS)
147 fatal(0, "Too many users");
148 user[users++] = arg;
149 }
150 }
151 }
152 if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
153 printer = DEFLP;
154
155 rmjob(printer);
156 exit(0);
157 }
158
159 static void
usage(void)160 usage(void)
161 {
162 fprintf(stderr, "usage: lprm [-] [-Pprinter] [[job #] [user] ...]\n");
163 exit(2);
164 }
165