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lprm.c revision 1.12 
      1 /*	$NetBSD: lprm.c,v 1.12 2002/07/03 22:28:28 kleink Exp $	*/
      2 
      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. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 #ifndef lint
     39 __COPYRIGHT("@(#) Copyright (c) 1983, 1993\n\
     40 	The Regents of the University of California.  All rights reserved.\n");
     41 #if 0
     42 static char sccsid[] = "@(#)lprm.c	8.1 (Berkeley) 6/6/93";
     43 #else
     44 __RCSID("$NetBSD: lprm.c,v 1.12 2002/07/03 22:28:28 kleink Exp $");
     45 #endif
     46 #endif /* not lint */
     47 
     48 /*
     49  * lprm - remove the current user's spool entry
     50  *
     51  * lprm [-] [[job #] [user] ...]
     52  *
     53  * Using information in the lock file, lprm will kill the
     54  * currently active daemon (if necessary), remove the associated files,
     55  * and startup a new daemon.  Privileged users may remove anyone's spool
     56  * entries, otherwise one can only remove their own.
     57  */
     58 
     59 #include <sys/param.h>
     60 
     61 #include <err.h>
     62 #include <syslog.h>
     63 #include <dirent.h>
     64 #include <pwd.h>
     65 #include <unistd.h>
     66 #include <stdlib.h>
     67 #include <stdio.h>
     68 #include <string.h>
     69 #include <ctype.h>
     70 
     71 #include "lp.h"
     72 #include "lp.local.h"
     73 
     74 /*
     75  * Stuff for handling job specifications
     76  */
     77 char	*person;		/* name of person doing lprm */
     78 int	 requ[MAXREQUESTS];	/* job number of spool entries */
     79 int	 requests;		/* # of spool requests */
     80 char	*user[MAXUSERS];	/* users to process */
     81 int	 users;			/* # of users in user array */
     82 uid_t	 uid, euid;		/* real and effective user id's */
     83 
     84 static char	luser[16];	/* buffer for person */
     85 
     86 static void usage __P((void));
     87 int main __P((int, char *[]));
     88 
     89 int
     90 main(argc, argv)
     91 	int argc;
     92 	char *argv[];
     93 {
     94 	char *arg;
     95 	struct passwd *p;
     96 
     97 	uid = getuid();
     98 	euid = geteuid();
     99 	seteuid(uid);	/* be safe */
    100 	name = argv[0];
    101 	gethostname(host, sizeof(host));
    102 	host[sizeof(host) - 1] = '\0';
    103 	openlog("lpd", 0, LOG_LPR);
    104 	if ((p = getpwuid(getuid())) == NULL)
    105 		fatal("Who are you?");
    106 	if (strlen(p->pw_name) >= sizeof(luser))
    107 		fatal("Your name is too long");
    108 	strncpy(luser, p->pw_name, sizeof(luser) - 1);
    109 	luser[sizeof(luser) - 1] = '\0';
    110 	person = luser;
    111 	while (--argc) {
    112 		if ((arg = *++argv)[0] == '-')
    113 			switch (arg[1]) {
    114 			case 'P':
    115 				if (arg[2])
    116 					printer = &arg[2];
    117 				else if (argc > 1) {
    118 					argc--;
    119 					printer = *++argv;
    120 				}
    121 				break;
    122 			case 'w':
    123 				if (arg[2])
    124 					wait_time = atoi(&arg[2]);
    125 				else if (argc > 1) {
    126 					argc--;
    127 					wait_time = atoi(*++argv);
    128 				}
    129 				if (wait_time < 0)
    130 					errx(1, "wait time must be positive: %d",
    131 					    wait_time);
    132 				if (wait_time < 30)
    133 				    warnx("warning: wait time less than 30 seconds");
    134 				break;
    135 			case '\0':
    136 				if (!users) {
    137 					users = -1;
    138 					break;
    139 				}
    140 			default:
    141 				usage();
    142 			}
    143 		else {
    144 			if (users < 0)
    145 				usage();
    146 			if (isdigit(arg[0])) {
    147 				if (requests >= MAXREQUESTS)
    148 					fatal("Too many requests");
    149 				requ[requests++] = atoi(arg);
    150 			} else {
    151 				if (users >= MAXUSERS)
    152 					fatal("Too many users");
    153 				user[users++] = arg;
    154 			}
    155 		}
    156 	}
    157 	if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
    158 		printer = DEFLP;
    159 
    160 	rmjob();
    161 	exit(0);
    162 }
    163 
    164 static void
    165 usage()
    166 {
    167 	fprintf(stderr,
    168 		"usage: lprm [-] [-Pprinter] [-w maxwait] [[job #] [user] ...]\n");
    169 	exit(2);
    170 }
    171