usr.sbin/lpr/lpq/lpq.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. Neither the name of the University nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  * @(#) Copyright (c) 1983, 1993 The Regents of the University of California.  All rights reserved.
  31  * @(#)lpq.c    8.3 (Berkeley) 5/10/95
  32  * $FreeBSD: src/usr.sbin/lpr/lpq/lpq.c,v 1.7.2.4 2001/07/22 02:51:53 gad Exp $
  33  */
  34
  35 /*
  36  * Spool Queue examination program
  37  *
  38  * lpq [-a] [-l] [-Pprinter] [user...] [job...]
  39  *
  40  * -a show all non-null queues on the local machine
  41  * -l long output
  42  * -P used to identify printer as per lpr/lprm
  43  */
  44
  45 #include <sys/param.h>
  46
  47 #include <ctype.h>
  48 #include <dirent.h>
  49 #include <err.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <syslog.h>
  53 #include <unistd.h>
  54
  55 #include "lp.h"
  56 #include "lp.local.h"
  57 #include "pathnames.h"
  58
  59 int      requ[MAXREQUESTS];     /* job number of spool entries */
  60 int      requests;              /* # of spool requests */
  61 char    *user[MAXUSERS];        /* users to process */
  62 int      users;                 /* # of users in user array */
  63
  64 uid_t   uid, euid;
  65
  66 static int       ckqueue(const struct printer *_pp);
  67 static void      usage(void);
  68
  69 int
  70 main(int argc, char **argv)
  71 {
  72         int ch, aflag, lflag;
  73         const char *printer;
  74         struct printer myprinter, *pp = &myprinter;
  75
  76         printer = NULL;
  77         euid = geteuid();
  78         uid = getuid();
  79         seteuid(uid);
  80         progname = *argv;
  81         if (gethostname(local_host, sizeof(local_host)))
  82                 err(1, "gethostname");
  83         openlog("lpd", 0, LOG_LPR);
  84
  85         aflag = lflag = 0;
  86         while ((ch = getopt(argc, argv, "alP:")) != -1)
  87                 switch((char)ch) {
  88                 case 'a':
  89                         ++aflag;
  90                         break;
  91                 case 'l':                       /* long output */
  92                         ++lflag;
  93                         break;
  94                 case 'P':               /* printer name */
  95                         printer = optarg;
  96                         break;
  97                 case '?':
  98                 default:
  99                         usage();
 100                 }
 101
 102         if (!aflag && printer == NULL && (printer = getenv("PRINTER")) == NULL)
 103                 printer = DEFLP;
 104
 105         for (argc -= optind, argv += optind; argc; --argc, ++argv)
 106                 if (isdigit(argv[0][0])) {
 107                         if (requests >= MAXREQUESTS)
 108                                 fatal(0, "too many requests");
 109                         requ[requests++] = atoi(*argv);
 110                 }
 111                 else {
 112                         if (users >= MAXUSERS)
 113                                 fatal(0, "too many users");
 114                         user[users++] = *argv;
 115                 }
 116
 117         if (aflag) {
 118                 int more, status;
 119
 120                 more = firstprinter(pp, &status);
 121                 if (status)
 122                         goto looperr;
 123                 while (more) {
 124                         if (ckqueue(pp) > 0) {
 125                                 printf("%s:\n", pp->printer);
 126                                 displayq(pp, lflag);
 127                                 printf("\n");
 128                         }
 129                         do {
 130                                 more = nextprinter(pp, &status);
 131 looperr:
 132                                 switch (status) {
 133                                 case PCAPERR_TCOPEN:
 134                                         printf("warning: %s: unresolved "
 135                                                "tc= reference(s) ",
 136                                                pp->printer);
 137                                 case PCAPERR_SUCCESS:
 138                                         break;
 139                                 default:
 140                                         fatal(pp, "%s", pcaperr(status));
 141                                 }
 142                         } while (more && status);
 143                 }
 144         } else {
 145                 int status;
 146
 147                 init_printer(pp);
 148                 status = getprintcap(printer, pp);
 149                 if (status < 0)
 150                         fatal(pp, "%s", pcaperr(status));
 151
 152                 displayq(pp, lflag);
 153         }
 154         exit(0);
 155 }
 156
 157 static int
 158 ckqueue(const struct printer *pp)
 159 {
 160         struct dirent *d;
 161         DIR *dirp;
 162         char *spooldir;
 163
 164         spooldir = pp->spool_dir;
 165         if ((dirp = opendir(spooldir)) == NULL)
 166                 return (-1);
 167         while ((d = readdir(dirp)) != NULL) {
 168                 if (d->d_name[0] != 'c' || d->d_name[1] != 'f')
 169                         continue;       /* daemon control files only */
 170                 closedir(dirp);
 171                 return (1);             /* found something */
 172         }
 173         closedir(dirp);
 174         return (0);
 175 }
 176
 177 static void
 178 usage(void)
 179 {
 180         fprintf(stderr,
 181         "usage: lpq [-a] [-l] [-Pprinter] [user ...] [job ...]\n");
 182         exit(1);
 183 }