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 * 4. 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 31 #ifndef lint 32 static const char copyright[] = 33 "@(#) Copyright (c) 1983, 1993\n\ 34 The Regents of the University of California. All rights reserved.\n"; 35 #endif /* not lint */ 36 37 #if 0 38 #ifndef lint 39 static char sccsid[] = "@(#)lprm.c 8.1 (Berkeley) 6/6/93"; 40 #endif /* not lint */ 41 #endif 42 43 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */ 44 __FBSDID("$FreeBSD$"); 45 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 <pwd.h> 62 #include <unistd.h> 63 #include <stdlib.h> 64 #include <stdio.h> 65 #include <string.h> 66 #include <ctype.h> 67 #include "lp.h" 68 #include "lp.local.h" 69 70 /* 71 * Stuff for handling job specifications 72 */ 73 char *person; /* name of person doing lprm */ 74 int requ[MAXREQUESTS]; /* job number of spool entries */ 75 int requests; /* # of spool requests */ 76 char *user[MAXUSERS]; /* users to process */ 77 int users; /* # of users in user array */ 78 uid_t uid, euid; /* real and effective user id's */ 79 80 static char luser[16]; /* buffer for person */ 81 82 int main(int argc, char *_argv[]); 83 static void usage(void); 84 85 int 86 main(int argc, char *argv[]) 87 { 88 char *arg; 89 const char *printer; 90 struct passwd *p; 91 static char root[] = "root"; 92 93 printer = NULL; 94 uid = getuid(); 95 euid = geteuid(); 96 seteuid(uid); /* be safe */ 97 progname = argv[0]; 98 gethostname(local_host, sizeof(local_host)); 99 openlog("lpd", 0, LOG_LPR); 100 101 /* 102 * Bogus code later checks for string equality between 103 * `person' and "root", so if we are root, better make sure 104 * that code will succeed. 105 */ 106 if (getuid() == 0) { 107 person = root; 108 } else if ((person = getlogin()) == NULL) { 109 if ((p = getpwuid(getuid())) == NULL) 110 fatal(0, "Who are you?"); 111 if (strlen(p->pw_name) >= sizeof(luser)) 112 fatal(0, "Your name is too long"); 113 strcpy(luser, p->pw_name); 114 person = luser; 115 } 116 while (--argc) { 117 if ((arg = *++argv)[0] == '-') 118 switch (arg[1]) { 119 case 'P': 120 if (arg[2]) 121 printer = &arg[2]; 122 else if (argc > 1) { 123 argc--; 124 printer = *++argv; 125 } 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(arg[0])) { 139 if (requests >= MAXREQUESTS) 140 fatal(0, "Too many requests"); 141 requ[requests++] = atoi(arg); 142 } else { 143 if (users >= MAXUSERS) 144 fatal(0, "Too many users"); 145 user[users++] = arg; 146 } 147 } 148 } 149 if (printer == NULL && (printer = getenv("PRINTER")) == NULL) 150 printer = DEFLP; 151 152 rmjob(printer); 153 exit(0); 154 } 155 156 static void 157 usage(void) 158 { 159 fprintf(stderr, "usage: lprm [-] [-Pprinter] [[job #] [user] ...]\n"); 160 exit(2); 161 } 162