blob: 8f411a341ab9167247a4f384f5d981e04adf982a [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Eric Andersenc4996011999-10-20 22:08:37 +00002/*
3 * Mini mknod implementation for busybox
4 *
5 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 */
22
Eric Andersencc8ed391999-10-05 16:24:54 +000023#include "internal.h"
Eric Andersenb0e9a701999-10-18 22:28:26 +000024#include <stdio.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000025#include <errno.h>
26#include <sys/types.h>
27#include <sys/stat.h>
28#include <fcntl.h>
29#include <unistd.h>
30
Erik Andersen7ab9c7e2000-05-12 19:41:47 +000031static const char mknod_usage[] = "mknod [OPTIONS] NAME TYPE MAJOR MINOR\n"
32#ifndef BB_FEATURE_TRIVIAL_HELP
33 "\nCreate a special file (block, character, or pipe).\n\n"
Erik Andersen5e1189e2000-04-15 16:34:54 +000034 "Options:\n"
35 "\t-m\tcreate the special file using the specified mode (default a=rw)\n\n"
Erik Andersene49d5ec2000-02-08 19:58:47 +000036 "TYPEs include:\n"
37 "\tb:\tMake a block (buffered) device.\n"
Erik Andersene49d5ec2000-02-08 19:58:47 +000038 "\tc or u:\tMake a character (un-buffered) device.\n"
Erik Andersen7ab9c7e2000-05-12 19:41:47 +000039 "\tp:\tMake a named pipe. MAJOR and MINOR are ignored for named pipes.\n"
40#endif
41 ;
Erik Andersene49d5ec2000-02-08 19:58:47 +000042
43int mknod_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000044{
Erik Andersen5e1189e2000-04-15 16:34:54 +000045 char *thisarg;
Erik Andersene49d5ec2000-02-08 19:58:47 +000046 mode_t mode = 0;
Erik Andersen5e1189e2000-04-15 16:34:54 +000047 mode_t perm = 0666;
Erik Andersene49d5ec2000-02-08 19:58:47 +000048 dev_t dev = 0;
Eric Andersencc8ed391999-10-05 16:24:54 +000049
Erik Andersen5e1189e2000-04-15 16:34:54 +000050 argc--;
51 argv++;
52
53 /* Parse any options */
54 while (argc > 1) {
55 if (**argv != '-')
56 break;
57 thisarg = *argv;
58 thisarg++;
59 switch (*thisarg) {
60 case 'm':
61 argc--;
62 argv++;
63 parse_mode(*argv, &perm);
Erik Andersen6ed02a02000-04-28 22:10:34 +000064 umask(0);
Erik Andersen5e1189e2000-04-15 16:34:54 +000065 break;
66 default:
67 usage(mknod_usage);
68 }
69 argc--;
70 argv++;
71 }
72 if (argc != 4 && argc != 2) {
Erik Andersene49d5ec2000-02-08 19:58:47 +000073 usage(mknod_usage);
Erik Andersen812d4662000-01-07 18:30:40 +000074 }
Erik Andersen5e1189e2000-04-15 16:34:54 +000075 switch (argv[1][0]) {
Eric Andersencc8ed391999-10-05 16:24:54 +000076 case 'c':
77 case 'u':
78 mode = S_IFCHR;
79 break;
80 case 'b':
81 mode = S_IFBLK;
82 break;
83 case 'p':
84 mode = S_IFIFO;
Erik Andersen5e1189e2000-04-15 16:34:54 +000085 if (argc!=2) {
86 usage(mknod_usage);
87 }
Eric Andersencc8ed391999-10-05 16:24:54 +000088 break;
89 default:
Erik Andersene49d5ec2000-02-08 19:58:47 +000090 usage(mknod_usage);
Eric Andersencc8ed391999-10-05 16:24:54 +000091 }
92
Erik Andersene49d5ec2000-02-08 19:58:47 +000093 if (mode == S_IFCHR || mode == S_IFBLK) {
Erik Andersen6ed02a02000-04-28 22:10:34 +000094 dev = (atoi(argv[2]) << 8) | atoi(argv[3]);
Eric Andersencc8ed391999-10-05 16:24:54 +000095 }
96
Erik Andersen5e1189e2000-04-15 16:34:54 +000097 mode |= perm;
Eric Andersencc8ed391999-10-05 16:24:54 +000098
Erik Andersen5e1189e2000-04-15 16:34:54 +000099 if (mknod(argv[0], mode, dev) != 0)
100 fatalError("%s: %s\n", argv[0], strerror(errno));
Erik Andersen9cf3bfa2000-04-13 18:49:43 +0000101 exit (TRUE);
Eric Andersencc8ed391999-10-05 16:24:54 +0000102}
Erik Andersen5e1189e2000-04-15 16:34:54 +0000103