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lprm.c revision 1.6 
      1 /*	$NetBSD: lprm.c,v 1.6 1996/12/09 09:57:49 mrg Exp $	*/
      2 /*
      3  * Copyright (c) 1983, 1993
      4  *	The Regents of the University of California.  All rights reserved.
      5  *
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef lint
     37 static char copyright[] =
     38 "@(#) Copyright (c) 1983, 1993\n\
     39 	The Regents of the University of California.  All rights reserved.\n";
     40 #endif /* not lint */
     41 
     42 #ifndef lint
     43 static char sccsid[] = "@(#)lprm.c	8.1 (Berkeley) 6/6/93";
     44 #endif /* not lint */
     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 void usage __P((void));
     83 
     84 int
     85 main(argc, argv)
     86 	int argc;
     87 	char *argv[];
     88 {
     89 	register char *arg;
     90 	struct passwd *p;
     91 
     92 	uid = getuid();
     93 	euid = geteuid();
     94 	seteuid(uid);	/* be safe */
     95 	name = argv[0];
     96 	gethostname(host, sizeof(host));
     97 	openlog("lpd", 0, LOG_LPR);
     98 	if ((p = getpwuid(getuid())) == NULL)
     99 		fatal("Who are you?");
    100 	if (strlen(p->pw_name) >= sizeof(luser))
    101 		fatal("Your name is too long");
    102 	strncpy(luser, p->pw_name, sizeof(luser) - 1);
    103 	person = luser;
    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("Too many requests");
    129 				requ[requests++] = atoi(arg);
    130 			} else {
    131 				if (users >= MAXUSERS)
    132 					fatal("Too many users");
    133 				user[users++] = arg;
    134 			}
    135 		}
    136 	}
    137 	if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
    138 		printer = DEFLP;
    139 
    140 	rmjob();
    141 	exit(0);
    142 }
    143 
    144 void
    145 usage()
    146 {
    147 	fprintf(stderr, "usage: lprm [-] [-Pprinter] [[job #] [user] ...]\n");
    148 	exit(2);
    149 }
    150