usr.sbin/lpr/lprm/lprm.c

   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  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by the University of
  17  *      California, Berkeley and its contributors.
  18  * 4. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * @(#) Copyright (c) 1983, 1993 The Regents of the University of California.  All rights reserved.
  35  * @(#)lprm.c   8.1 (Berkeley) 6/6/93
  36  * $FreeBSD: src/usr.sbin/lpr/lprm/lprm.c,v 1.6.2.3 2001/06/25 01:01:04 gad Exp $
  37  * $DragonFly: src/usr.sbin/lpr/lprm/lprm.c,v 1.2 2003/06/17 04:29:56 dillon Exp $
  38  */
  39
  40 /*
  41  * lprm - remove the current user's spool entry
  42  *
  43  * lprm [-] [[job #] [user] ...]
  44  *
  45  * Using information in the lock file, lprm will kill the
  46  * currently active daemon (if necessary), remove the associated files,
  47  * and startup a new daemon.  Priviledged users may remove anyone's spool
  48  * entries, otherwise one can only remove their own.
  49  */
  50
  51 #include <sys/param.h>
  52
  53 #include <syslog.h>
  54 #include <dirent.h>
  55 #include <pwd.h>
  56 #include <unistd.h>
  57 #include <stdlib.h>
  58 #include <stdio.h>
  59 #include <string.h>
  60 #include <ctype.h>
  61 #include "lp.h"
  62 #include "lp.local.h"
  63
  64 /*
  65  * Stuff for handling job specifications
  66  */
  67 char    *person;                /* name of person doing lprm */
  68 int      requ[MAXREQUESTS];     /* job number of spool entries */
  69 int      requests;              /* # of spool requests */
  70 char    *user[MAXUSERS];        /* users to process */
  71 int      users;                 /* # of users in user array */
  72 uid_t    uid, euid;             /* real and effective user id's */
  73
  74 static char     luser[16];      /* buffer for person */
  75
  76 int              main(int argc, char *_argv[]);
  77 static void      usage(void);
  78
  79 int
  80 main(int argc, char *argv[])
  81 {
  82         char *arg;
  83         const char *printer;
  84         struct passwd *p;
  85         static char root[] = "root";
  86
  87         printer = NULL;
  88         uid = getuid();
  89         euid = geteuid();
  90         seteuid(uid);   /* be safe */
  91         progname = argv[0];
  92         gethostname(local_host, sizeof(local_host));
  93         openlog("lpd", 0, LOG_LPR);
  94
  95         /*
  96          * Bogus code later checks for string equality between
  97          * `person' and "root", so if we are root, better make sure
  98          * that code will succeed.
  99          */
 100         if (getuid() == 0) {
 101                 person = root;
 102         } else if ((person = getlogin()) == NULL) {
 103                 if ((p = getpwuid(getuid())) == NULL)
 104                         fatal(0, "Who are you?");
 105                 if (strlen(p->pw_name) >= sizeof(luser))
 106                         fatal(0, "Your name is too long");
 107                 strcpy(luser, p->pw_name);
 108                 person = luser;
 109         }
 110         while (--argc) {
 111                 if ((arg = *++argv)[0] == '-')
 112                         switch (arg[1]) {
 113                         case 'P':
 114                                 if (arg[2])
 115                                         printer = &arg[2];
 116                                 else if (argc > 1) {
 117                                         argc--;
 118                                         printer = *++argv;
 119                                 }
 120                                 break;
 121                         case '\0':
 122                                 if (!users) {
 123                                         users = -1;
 124                                         break;
 125                                 }
 126                         default:
 127                                 usage();
 128                         }
 129                 else {
 130                         if (users < 0)
 131                                 usage();
 132                         if (isdigit(arg[0])) {
 133                                 if (requests >= MAXREQUESTS)
 134                                         fatal(0, "Too many requests");
 135                                 requ[requests++] = atoi(arg);
 136                         } else {
 137                                 if (users >= MAXUSERS)
 138                                         fatal(0, "Too many users");
 139                                 user[users++] = arg;
 140                         }
 141                 }
 142         }
 143         if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
 144                 printer = DEFLP;
 145
 146         rmjob(printer);
 147         exit(0);
 148 }
 149
 150 static void
 151 usage(void)
 152 {
 153         fprintf(stderr, "usage: lprm [-] [-Pprinter] [[job #] [user] ...]\n");
 154         exit(2);
 155 }