usr.bin/mkfifo/mkfifo.c

   1 /*
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1990, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)mkfifo.c 8.2 (Berkeley) 1/5/94
  35  * $FreeBSD: src/usr.bin/mkfifo/mkfifo.c,v 1.5 1999/08/28 01:04:06 peter Exp $
  36  * $DragonFly: src/usr.bin/mkfifo/mkfifo.c,v 1.7 2005/03/16 07:16:14 cpressey Exp $
  37  */
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41
  42 #include <err.h>
  43 #include <errno.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <unistd.h>
  47
  48 #define BASEMODE        S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | \
  49                         S_IROTH | S_IWOTH
  50
  51 static void usage(void);
  52
  53 static int f_mode;
  54
  55 int
  56 main(int argc, char **argv)
  57 {
  58         const char *modestr;
  59         void *modep;
  60         mode_t fifomode;
  61         int ch, exitval;
  62
  63         modestr = modep = NULL;
  64
  65         while ((ch = getopt(argc, argv, "m:")) != -1) {
  66                 switch (ch) {
  67                 case 'm':
  68                         f_mode = 1;
  69                         modestr = optarg;
  70                         break;
  71                 case '?':
  72                 default:
  73                         usage();
  74                 }
  75         }
  76         argc -= optind;
  77         argv += optind;
  78         if (argv[0] == NULL)
  79                 usage();
  80
  81         if (f_mode) {
  82                 umask(0);
  83                 errno = 0;
  84                 if ((modep = setmode(modestr)) == NULL) {
  85                         if (errno != 0)
  86                                 err(1, "malloc failed");
  87                         errx(1, "invalid file mode: %s", modestr);
  88                 }
  89                 fifomode = getmode(modep, BASEMODE);
  90                 /* No need to free() modep here, as we'll be exiting soon. */
  91         } else {
  92                 fifomode = BASEMODE;
  93         }
  94
  95         for (exitval = 0; *argv != NULL; ++argv) {
  96                 if (mkfifo(*argv, fifomode) < 0) {
  97                         warn("%s", *argv);
  98                         exitval = 1;
  99                 }
 100         }
 101         exit(exitval);
 102 }
 103
 104 static void
 105 usage(void)
 106 {
 107         fprintf(stderr, "usage: mkfifo [-m mode] fifo_name ...\n");
 108         exit(1);
 109 }