usr.bin/mkfifo/mkfifo.c

   1 /*      $NetBSD: mkfifo.c,v 1.13 2011/09/04 20:30:34 joerg Exp $        */
   2
   3 /*
   4  * Copyright (c) 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __COPYRIGHT("@(#) Copyright (c) 1990, 1993\
  35  The Regents of the University of California.  All rights reserved.");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)mkfifo.c    8.2 (Berkeley) 1/5/94";
  41 #endif
  42 __RCSID("$NetBSD: mkfifo.c,v 1.13 2011/09/04 20:30:34 joerg Exp $");
  43 #endif /* not lint */
  44
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include <locale.h>
  49 #include <errno.h>
  50 #include <sys/types.h>
  51 #include <sys/stat.h>
  52 #include <unistd.h>
  53 #include <err.h>
  54
  55 __dead static void usage(void);
  56
  57 int
  58 main(int argc, char *argv[])
  59 {
  60         int ch, exitval;
  61         void *set;
  62         mode_t mode;
  63
  64         setlocale (LC_ALL, "");
  65
  66         /* The default mode is the value of the bitwise inclusive or of
  67            S_IRUSR, S_IWUSR, S_IRGRP, S_IWGRP, S_IROTH, and S_IWOTH
  68            modified by the file creation mask */
  69         mode = 0666 & ~umask(0);
  70
  71         while ((ch = getopt(argc, argv, "m:")) != -1)
  72                 switch(ch) {
  73                 case 'm':
  74                         if (!(set = setmode(optarg))) {
  75                                 err(1, "Cannot set file mode `%s'", optarg);
  76                                 /* NOTREACHED */
  77                         }
  78                         /* In symbolic mode strings, the + and - operators are
  79                            interpreted relative to an assumed initial mode of
  80                            a=rw. */
  81                         mode = getmode(set, 0666);
  82                         free(set);
  83                         break;
  84                 case '?':
  85                 default:
  86                         usage();
  87                 }
  88         argc -= optind;
  89         argv += optind;
  90         if (argv[0] == NULL)
  91                 usage();
  92
  93         for (exitval = 0; *argv; ++argv) {
  94                 if (mkfifo(*argv, mode) < 0) {
  95                         warn("%s", *argv);
  96                         exitval = 1;
  97                 }
  98         }
  99         exit(exitval);
 100 }
 101
 102 static void
 103 usage(void)
 104 {
 105         (void)fprintf(stderr, "usage: mkfifo [-m mode] fifoname ...\n");
 106         exit(1);
 107 }