usr.sbin/lpr/lprm/lprm.c

   1 /*      $NetBSD: lprm.c,v 1.18 2007/12/15 19:44:55 perry 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. 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 #include <sys/cdefs.h>
  34 #ifndef lint
  35 __COPYRIGHT("@(#) Copyright (c) 1983, 1993\
  36  The Regents of the University of California.  All rights reserved.");
  37 #if 0
  38 static char sccsid[] = "@(#)lprm.c      8.1 (Berkeley) 6/6/93";
  39 #else
  40 __RCSID("$NetBSD: lprm.c,v 1.18 2007/12/15 19:44:55 perry Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 /*
  45  * lprm - remove the current user's spool entry
  46  *
  47  * lprm [-] [[job #] [user] ...]
  48  *
  49  * Using information in the lock file, lprm will kill the
  50  * currently active daemon (if necessary), remove the associated files,
  51  * and startup a new daemon.  Privileged users may remove anyone's spool
  52  * entries, otherwise one can only remove their own.
  53  */
  54
  55 #include <sys/param.h>
  56
  57 #include <err.h>
  58 #include <syslog.h>
  59 #include <dirent.h>
  60 #include <pwd.h>
  61 #include <unistd.h>
  62 #include <stdlib.h>
  63 #include <stdio.h>
  64 #include <string.h>
  65 #include <ctype.h>
  66
  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 static void usage(void) __dead;
  83
  84 int
  85 main(int argc, char *argv[])
  86 {
  87         char *arg;
  88         struct passwd *p;
  89
  90         uid = getuid();
  91         euid = geteuid();
  92         seteuid(uid);   /* be safe */
  93         setprogname(*argv);
  94         gethostname(host, sizeof(host));
  95         host[sizeof(host) - 1] = '\0';
  96         openlog("lpd", 0, LOG_LPR);
  97         if ((p = getpwuid(getuid())) == NULL)
  98                 fatal("Who are you?");
  99         if (strlen(p->pw_name) >= sizeof(luser))
 100                 fatal("Your name is too long");
 101         strlcpy(luser, p->pw_name, sizeof(luser));
 102         person = luser;
 103         while (--argc) {
 104                 if ((arg = *++argv)[0] == '-')
 105                         switch (arg[1]) {
 106                         case 'P':
 107                                 if (arg[2])
 108                                         printer = &arg[2];
 109                                 else if (argc > 1) {
 110                                         argc--;
 111                                         printer = *++argv;
 112                                 }
 113                                 break;
 114                         case 'w':
 115                                 if (arg[2])
 116                                         wait_time = atoi(&arg[2]);
 117                                 else if (argc > 1) {
 118                                         argc--;
 119                                         wait_time = atoi(*++argv);
 120                                 }
 121                                 if (wait_time < 0)
 122                                         errx(1, "wait time must be positive: %d",
 123                                             wait_time);
 124                                 if (wait_time < 30)
 125                                     warnx("warning: wait time less than 30 seconds");
 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((unsigned char)arg[0])) {
 139                                 if (requests >= MAXREQUESTS)
 140                                         fatal("Too many requests");
 141                                 requ[requests++] = atoi(arg);
 142                         } else {
 143                                 if (users >= MAXUSERS)
 144                                         fatal("Too many users");
 145                                 user[users++] = arg;
 146                         }
 147                 }
 148         }
 149         if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
 150                 printer = DEFLP;
 151
 152         rmjob();
 153         exit(0);
 154 }
 155
 156 static void
 157 usage(void)
 158 {
 159         (void)fprintf(stderr,
 160             "Usage: %s [-] [-Pprinter] [-w maxwait] [[job #] [user] ...]\n",
 161             getprogname());
 162         exit(2);
 163 }