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 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */
34 /*
35 * lprm - remove the current user's spool entry
36 *
37 * lprm [-] [[job #] [user] ...]
38 *
39 * Using information in the lock file, lprm will kill the
40 * currently active daemon (if necessary), remove the associated files,
41 * and startup a new daemon. Priviledged users may remove anyone's spool
42 * entries, otherwise one can only remove their own.
43 */
44
45 #include <sys/param.h>
46
47 #include <syslog.h>
48 #include <dirent.h>
49 #include <err.h>
50 #include <pwd.h>
51 #include <unistd.h>
52 #include <stdlib.h>
53 #include <stdio.h>
54 #include <string.h>
55 #include <ctype.h>
56 #include "lp.h"
57 #include "lp.local.h"
58
59 /*
60 * Stuff for handling job specifications
61 */
62 char *person; /* name of person doing lprm */
63 int requ[MAXREQUESTS]; /* job number of spool entries */
64 int requests; /* # of spool requests */
65 char *user[MAXUSERS]; /* users to process */
66 int users; /* # of users in user array */
67 uid_t uid, euid; /* real and effective user id's */
68
69 static char luser[16]; /* buffer for person */
70
71 int main(int argc, char *_argv[]);
72 static void usage(void);
73
74 int
main(int argc,char * argv[])75 main(int argc, char *argv[])
76 {
77 char *arg;
78 const char *printer;
79 struct passwd *p;
80 static char root[] = "root";
81
82 printer = NULL;
83 uid = getuid();
84 euid = geteuid();
85 PRIV_END /* be safe */
86 progname = argv[0];
87 gethostname(local_host, sizeof(local_host));
88 openlog("lpd", 0, LOG_LPR);
89
90 /*
91 * Bogus code later checks for string equality between
92 * `person' and "root", so if we are root, better make sure
93 * that code will succeed.
94 */
95 if (getuid() == 0) {
96 person = root;
97 } else if ((person = getlogin()) == NULL) {
98 if ((p = getpwuid(getuid())) == NULL)
99 fatal(0, "Who are you?");
100 if (strlen(p->pw_name) >= sizeof(luser))
101 fatal(0, "Your name is too long");
102 strcpy(luser, p->pw_name);
103 person = luser;
104 }
105 while (--argc) {
106 if ((arg = *++argv)[0] == '-')
107 switch (arg[1]) {
108 case 'P':
109 if (arg[2])
110 printer = &arg[2];
111 else if (argc > 1) {
112 argc--;
113 printer = *++argv;
114 }
115 break;
116 case '\0':
117 if (!users) {
118 users = -1;
119 break;
120 }
121 default:
122 usage();
123 }
124 else {
125 if (users < 0)
126 usage();
127 if (isdigit(arg[0])) {
128 if (requests >= MAXREQUESTS)
129 fatal(0, "Too many requests");
130 requ[requests++] = atoi(arg);
131 } else {
132 if (users >= MAXUSERS)
133 fatal(0, "Too many users");
134 user[users++] = arg;
135 }
136 }
137 }
138 if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
139 printer = DEFLP;
140
141 rmjob(printer);
142 exit(0);
143 }
144
145 static void
usage(void)146 usage(void)
147 {
148 fprintf(stderr, "usage: lprm [-] [-Pprinter] [[job #] [user] ...]\n");
149 exit(2);
150 }
151