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 /* 47 * lprm - remove the current user's spool entry 48 * 49 * lprm [-] [[job #] [user] ...] 50 * 51 * Using information in the lock file, lprm will kill the 52 * currently active daemon (if necessary), remove the associated files, 53 * and startup a new daemon. Priviledged users may remove anyone's spool 54 * entries, otherwise one can only remove their own. 55 */ 56 57 #include <sys/param.h> 58 59 #include <syslog.h> 60 #include <dirent.h> 61 #include <err.h> 62 #include <pwd.h> 63 #include <unistd.h> 64 #include <stdlib.h> 65 #include <stdio.h> 66 #include <string.h> 67 #include <ctype.h> 68 #include "lp.h" 69 #include "lp.local.h" 70 71 /* 72 * Stuff for handling job specifications 73 */ 74 char *person; /* name of person doing lprm */ 75 int requ[MAXREQUESTS]; /* job number of spool entries */ 76 int requests; /* # of spool requests */ 77 char *user[MAXUSERS]; /* users to process */ 78 int users; /* # of users in user array */ 79 uid_t uid, euid; /* real and effective user id's */ 80 81 static char luser[16]; /* buffer for person */ 82 83 int main(int argc, char *_argv[]); 84 static void usage(void); 85 86 int 87 main(int argc, char *argv[]) 88 { 89 char *arg; 90 const char *printer; 91 struct passwd *p; 92 static char root[] = "root"; 93 94 printer = NULL; 95 uid = getuid(); 96 euid = geteuid(); 97 PRIV_END /* be safe */ 98 progname = argv[0]; 99 gethostname(local_host, sizeof(local_host)); 100 openlog("lpd", 0, LOG_LPR); 101 102 /* 103 * Bogus code later checks for string equality between 104 * `person' and "root", so if we are root, better make sure 105 * that code will succeed. 106 */ 107 if (getuid() == 0) { 108 person = root; 109 } else if ((person = getlogin()) == NULL) { 110 if ((p = getpwuid(getuid())) == NULL) 111 fatal(0, "Who are you?"); 112 if (strlen(p->pw_name) >= sizeof(luser)) 113 fatal(0, "Your name is too long"); 114 strcpy(luser, p->pw_name); 115 person = luser; 116 } 117 while (--argc) { 118 if ((arg = *++argv)[0] == '-') 119 switch (arg[1]) { 120 case 'P': 121 if (arg[2]) 122 printer = &arg[2]; 123 else if (argc > 1) { 124 argc--; 125 printer = *++argv; 126 } 127 break; 128 case '\0': 129 if (!users) { 130 users = -1; 131 break; 132 } 133 default: 134 usage(); 135 } 136 else { 137 if (users < 0) 138 usage(); 139 if (isdigit(arg[0])) { 140 if (requests >= MAXREQUESTS) 141 fatal(0, "Too many requests"); 142 requ[requests++] = atoi(arg); 143 } else { 144 if (users >= MAXUSERS) 145 fatal(0, "Too many users"); 146 user[users++] = arg; 147 } 148 } 149 } 150 if (printer == NULL && (printer = getenv("PRINTER")) == NULL) 151 printer = DEFLP; 152 153 rmjob(printer); 154 exit(0); 155 } 156 157 static void 158 usage(void) 159 { 160 fprintf(stderr, "usage: lprm [-] [-Pprinter] [[job #] [user] ...]\n"); 161 exit(2); 162 } 163