1 /*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * @(#) Copyright (c) 1983, 1993 The Regents of the University of California. All rights reserved.
31 * @(#)lprm.c 8.1 (Berkeley) 6/6/93
32 * $FreeBSD: src/usr.sbin/lpr/lprm/lprm.c,v 1.6.2.3 2001/06/25 01:01:04 gad Exp $
33 */
34
35 /*
36 * lprm - remove the current user's spool entry
37 *
38 * lprm [-] [[job #] [user] ...]
39 *
40 * Using information in the lock file, lprm will kill the
41 * currently active daemon (if necessary), remove the associated files,
42 * and startup a new daemon. Priviledged users may remove anyone's spool
43 * entries, otherwise one can only remove their own.
44 */
45
46 #include <sys/param.h>
47
48 #include <syslog.h>
49 #include <dirent.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 static void usage(void);
72
73 int
main(int argc,char * argv[])74 main(int argc, char *argv[])
75 {
76 char *arg;
77 const char *printer;
78 struct passwd *p;
79 static char root[] = "root";
80
81 printer = NULL;
82 uid = getuid();
83 euid = geteuid();
84 seteuid(uid); /* be safe */
85 progname = argv[0];
86 gethostname(local_host, sizeof(local_host));
87 openlog("lpd", 0, LOG_LPR);
88
89 /*
90 * Bogus code later checks for string equality between
91 * `person' and "root", so if we are root, better make sure
92 * that code will succeed.
93 */
94 if (getuid() == 0) {
95 person = root;
96 } else if ((person = getlogin()) == NULL) {
97 if ((p = getpwuid(getuid())) == NULL)
98 fatal(0, "Who are you?");
99 if (strlen(p->pw_name) >= sizeof(luser))
100 fatal(0, "Your name is too long");
101 strcpy(luser, p->pw_name);
102 person = luser;
103 }
104 while (--argc) {
105 if ((arg = *++argv)[0] == '-')
106 switch (arg[1]) {
107 case 'P':
108 if (arg[2])
109 printer = &arg[2];
110 else if (argc > 1) {
111 argc--;
112 printer = *++argv;
113 }
114 break;
115 case '\0':
116 if (!users) {
117 users = -1;
118 break;
119 }
120 default:
121 usage();
122 }
123 else {
124 if (users < 0)
125 usage();
126 if (isdigit(arg[0])) {
127 if (requests >= MAXREQUESTS)
128 fatal(0, "Too many requests");
129 requ[requests++] = atoi(arg);
130 } else {
131 if (users >= MAXUSERS)
132 fatal(0, "Too many users");
133 user[users++] = arg;
134 }
135 }
136 }
137 if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
138 printer = DEFLP;
139
140 rmjob(printer);
141 exit(0);
142 }
143
144 static void
usage(void)145 usage(void)
146 {
147 fprintf(stderr, "usage: lprm [-] [-Pprinter] [[job #] [user] ...]\n");
148 exit(2);
149 }
150