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mknod.c

/*    $OpenBSD: mknod.c,v 1.13 2003/06/02 20:06:15 millert Exp $  */
/*    $NetBSD: mknod.c,v 1.8 1995/08/11 00:08:18 jtc Exp $  */

/*
 * Copyright (c) 1989, 1990, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kevin Fall.
 *
 * 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>
__COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
      The Regents of the University of California.  All rights reserved.\n");
__SCCSID("@(#)mknod.c   8.1 (Berkeley) 6/5/93");
__RCSID("$MirOS: src/sbin/mknod/mknod.c,v 1.2 2007/07/05 23:09:35 tg Exp $");

#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <locale.h>
#include <err.h>

extern char *__progname;

int domknod(int, char **, mode_t);
int domkfifo(int, char **, mode_t);
void usage(int);

int
main(int argc, char *argv[])
{
      int ch, ismkfifo = 0;
      void *set = NULL;
      mode_t mode = 0;

#ifndef __MirBSD__
      setlocale (LC_ALL, "");
#endif

      if (strcmp(__progname, "mkfifo") == 0)
            ismkfifo = 1;

      while ((ch = getopt(argc, argv, "m:")) != -1)
            switch(ch) {
            case 'm':
                  if (!(set = setmode(optarg))) {
                        errx(1, "invalid file mode.");
                        /* NOTREACHED */
                  }

                  /*
                   * In symbolic mode strings, the + and - operators are
                   * interpreted relative to an assumed initial mode of
                   * a=rw.
                   */
                  mode = getmode(set, DEFFILEMODE);
                  free(set);
                  break;
            case '?':
            default:
                  usage(ismkfifo);
            }
      argc -= optind;
      argv += optind;

      if (argv[0] == NULL)
            usage(ismkfifo);
      if (!ismkfifo) {
            if (argc == 2 && argv[1][0] == 'p') {
                  ismkfifo = 2;
                  argc--;
                  argv[1] = NULL;
            } else if (argc != 4) {
                  usage(ismkfifo);
                  /* NOTREACHED */
            }
      }

      /*
       * If the user specified a mode via `-m', don't allow the umask
       * to modified it.  If no `-m' flag was specified, the default
       * mode is the value of the bitwise inclusive or of S_IRUSR,
       * S_IWUSR, S_IRGRP, S_IWGRP, S_IROTH, and S_IWOTH as modified by
       * the umask.
       */
      if (set)
            (void)umask(0);
      else
            mode = DEFFILEMODE;

      if (ismkfifo)
            exit(domkfifo(argc, argv, mode));
      else
            exit(domknod(argc, argv, mode));
}

int
domknod(int argc, char **argv, mode_t mode)
{
      dev_t dev;
      char *endp;
      u_int major, minor;

      if (argv[1][0] == 'c')
            mode |= S_IFCHR;
      else if (argv[1][0] == 'b')
            mode |= S_IFBLK;
      else {
            errx(1, "node must be type 'b' or 'c'.");
            /* NOTREACHED */
      }

      major = (long)strtoul(argv[2], &endp, 0);
      if (endp == argv[2] || *endp != '\0') {
            errx(1, "non-numeric major number.");
            /* NOTREACHED */
      }
      minor = (long)strtoul(argv[3], &endp, 0);
      if (endp == argv[3] || *endp != '\0') {
            errx(1, "non-numeric minor number.");
            /* NOTREACHED */
      }
      dev = makedev(major, minor);
      if (major(dev) != major || minor(dev) != minor) {
            errx(1, "major or minor number too large");
            /* NOTREACHED */
      }
      if (mknod(argv[0], mode, dev) < 0) {
            err(1, "%s", argv[0]);
            /* NOTREACHED */
      }
      return(0);
}

int
domkfifo(int argc, char **argv, mode_t mode)
{
      int rv;

      for (rv = 0; *argv; ++argv) {
            if (mkfifo(*argv, mode) < 0) {
                  warn("%s", *argv);
                  rv = 1;
            }
      }
      return(rv);
}

void
usage(int ismkfifo)
{

      if (ismkfifo == 1)
            (void)fprintf(stderr, "usage: %s [-m mode] fifoname ...\n",
                __progname);
      else {
            (void)fprintf(stderr, "usage: %s [-m mode] name [b | c] major minor\n",
                __progname);
            (void)fprintf(stderr, "usage: %s [-m mode] name p\n",
                __progname);
      }
      exit(1);
}

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