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