/*      $NetBSD: lprm.c,v 1.20 2019/02/03 03:19:31 mrg Exp $    */

/*
* Copyright (c) 1983, 1993
*      The Regents of the University of California.  All rights reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1983, 1993\
The Regents of the University of California.  All rights reserved.");
#if 0
static char sccsid[] = "@(#)lprm.c      8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: lprm.c,v 1.20 2019/02/03 03:19:31 mrg Exp $");
#endif
#endif /* not lint */

/*
* lprm - remove the current user's spool entry
*
* lprm [-] [[job #] [user] ...]
*
* Using information in the lock file, lprm will kill the
* currently active daemon (if necessary), remove the associated files,
* and startup a new daemon.  Privileged users may remove anyone's spool
* entries, otherwise one can only remove their own.
*/

#include <sys/param.h>

#include <err.h>
#include <syslog.h>
#include <dirent.h>
#include <pwd.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>

#include "lp.h"
#include "lp.local.h"

/*
* Stuff for handling job specifications
*/
char    *person;                /* name of person doing lprm */
int      requ[MAXREQUESTS];     /* job number of spool entries */
int      requests;              /* # of spool requests */
char    *user[MAXUSERS];        /* users to process */
int      users;                 /* # of users in user array */
uid_t    uid, euid;             /* real and effective user id's */

static char     luser[16];      /* buffer for person */

static void usage(void) __dead;

int
main(int argc, char *argv[])
{
       char *arg;
       struct passwd *p;

       uid = getuid();
       euid = geteuid();
       seteuid(uid);   /* be safe */
       setprogname(*argv);
       gethostname(host, sizeof(host));
       host[sizeof(host) - 1] = '\0';
       openlog("lpd", 0, LOG_LPR);
       if ((p = getpwuid(getuid())) == NULL)
               fatal("Who are you?");
       if (strlen(p->pw_name) >= sizeof(luser))
               fatal("Your name is too long");
       strlcpy(luser, p->pw_name, sizeof(luser));
       person = luser;
       while (--argc) {
               if ((arg = *++argv)[0] == '-')
                       switch (arg[1]) {
                       case 'P':
                               if (arg[2])
                                       printer = &arg[2];
                               else if (argc > 1) {
                                       argc--;
                                       printer = *++argv;
                               }
                               break;
                       case 'w':
                               if (arg[2])
                                       wait_time = atoi(&arg[2]);
                               else if (argc > 1) {
                                       argc--;
                                       wait_time = atoi(*++argv);
                               }
                               if (wait_time < 0)
                                       errx(1, "wait time must be positive: %d",
                                           wait_time);
                               if (wait_time < 30)
                                   warnx("warning: wait time less than 30 seconds");
                               break;
                       case '\0':
                               if (!users) {
                                       users = -1;
                                       break;
                               }
                               /* FALLTHROUGH */
                       default:
                               usage();
                       }
               else {
                       if (users < 0)
                               usage();
                       if (isdigit((unsigned char)arg[0])) {
                               if (requests >= MAXREQUESTS)
                                       fatal("Too many requests");
                               requ[requests++] = atoi(arg);
                       } else {
                               if (users >= MAXUSERS)
                                       fatal("Too many users");
                               user[users++] = arg;
                       }
               }
       }
       if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
               printer = DEFLP;

       rmjob();
       exit(0);
}

static void
usage(void)
{
       (void)fprintf(stderr,
           "Usage: %s [-] [-Pprinter] [-w maxwait] [[job #] [user] ...]\n",
           getprogname());
       exit(2);
}