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https://github.com/topjohnwu/ndk-busybox.git
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104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini mknod implementation for busybox
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*
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* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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static const char mknod_usage[] = "mknod [OPTIONS] NAME TYPE MAJOR MINOR\n"
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#ifndef BB_FEATURE_TRIVIAL_HELP
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"\nCreate a special file (block, character, or pipe).\n\n"
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"Options:\n"
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"\t-m\tcreate the special file using the specified mode (default a=rw)\n\n"
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"TYPEs include:\n"
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"\tb:\tMake a block (buffered) device.\n"
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"\tc or u:\tMake a character (un-buffered) device.\n"
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"\tp:\tMake a named pipe. MAJOR and MINOR are ignored for named pipes.\n"
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#endif
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;
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int mknod_main(int argc, char **argv)
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{
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char *thisarg;
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mode_t mode = 0;
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mode_t perm = 0666;
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dev_t dev = 0;
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argc--;
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argv++;
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/* Parse any options */
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while (argc > 1) {
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if (**argv != '-')
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break;
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thisarg = *argv;
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thisarg++;
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switch (*thisarg) {
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case 'm':
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argc--;
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argv++;
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parse_mode(*argv, &perm);
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umask(0);
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break;
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default:
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usage(mknod_usage);
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}
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argc--;
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argv++;
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}
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if (argc != 4 && argc != 2) {
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usage(mknod_usage);
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}
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switch (argv[1][0]) {
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case 'c':
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case 'u':
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mode = S_IFCHR;
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break;
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case 'b':
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mode = S_IFBLK;
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break;
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case 'p':
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mode = S_IFIFO;
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if (argc!=2) {
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usage(mknod_usage);
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}
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break;
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default:
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usage(mknod_usage);
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}
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if (mode == S_IFCHR || mode == S_IFBLK) {
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dev = (atoi(argv[2]) << 8) | atoi(argv[3]);
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}
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mode |= perm;
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if (mknod(argv[0], mode, dev) != 0)
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fatalError("%s: %s\n", argv[0], strerror(errno));
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return (TRUE);
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}
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