1 /* mknod -- make special files
2 Copyright (C) 1990, 1991, 1995 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
18 /* Usage: mknod [-m mode] [--mode=mode] path {bcu} major minor
19 make a block or character device node
20 mknod [-m mode] [--mode=mode] path p
21 make a FIFO (named pipe)
24 -m, --mode=mode Set the mode of created nodes to MODE, which is
25 symbolic as in chmod and uses the umask as a point of
28 David MacKenzie <djm@ai.mit.edu> */
33 #include <sys/types.h>
36 #include "modechange.h"
40 /* The name this program was run with. */
43 /* If nonzero, display usage information and exit. */
46 /* If nonzero, print the version on standard output and exit. */
47 static int show_version;
49 static struct option const longopts[] =
51 {"mode", required_argument, NULL, 'm'},
52 {"help", no_argument, &show_help, 1},
53 {"version", no_argument, &show_version, 1},
61 fprintf (stderr, _("Try `%s --help' for more information.\n"),
65 printf (_("Usage: %s [OPTION]... NAME TYPE [MAJOR MINOR]\n"), program_name);
67 Create the special file NAME of the given TYPE.\n\
69 -m, --mode=MODE set permission mode (as in chmod), not 0666 - umask\n\
70 --help display this help and exit\n\
71 --version output version information and exit\n\
73 MAJOR MINOR are forbidden for TYPE p, mandatory otherwise. TYPE may be:\n\
75 b create a block (buffered) special file\n\
76 c, u create a character (unbuffered) special file \n\
83 main (int argc, char **argv)
85 unsigned short newmode;
86 struct mode_change *change;
90 long int tmp_major, tmp_minor;
93 program_name = argv[0];
94 setlocale (LC_ALL, "");
95 bindtextdomain (PACKAGE, LOCALEDIR);
100 while ((optc = getopt_long (argc, argv, "m:", longopts, (int *) 0)) != EOF)
107 symbolic_mode = optarg;
116 printf ("mknod - %s\n", PACKAGE_VERSION);
123 newmode = 0666 & ~umask (0);
126 change = mode_compile (symbolic_mode, 0);
127 if (change == MODE_INVALID)
128 error (1, 0, _("invalid mode"));
129 else if (change == MODE_MEMORY_EXHAUSTED)
130 error (1, 0, _("virtual memory exhausted"));
131 newmode = mode_adjust (newmode, change);
134 if (argc - optind != 2 && argc - optind != 4)
137 if (argc - optind < 2)
138 msg = _("too few arguments");
139 else if (argc - optind > 4)
140 msg = _("too many arguments");
142 msg = _("wrong number of arguments");
147 /* Only check the first character, to allow mnemonic usage like
148 `mknod /dev/rst0 character 18 0'. */
150 switch (argv[optind + 1][0])
152 case 'b': /* `block' or `buffered' */
154 error (4, 0, _("block special files not supported"));
156 if (argc - optind != 4)
159 when creating block special files, major and minor device\n\
160 numbers must be specified"));
164 s = argv[optind + 2];
165 if (xstrtol (s, NULL, 0, &tmp_major, NULL) != LONGINT_OK)
166 error (1, 0, _("invalid major device number `%s'"), s);
168 s = argv[optind + 3];
169 if (xstrtol (s, NULL, 0, &tmp_minor, NULL) != LONGINT_OK)
170 error (1, 0, _("invalid minor device number `%s'"), s);
172 i_major = (int) tmp_major;
173 i_minor = (int) tmp_minor;
175 if (mknod (argv[optind], newmode | S_IFBLK, makedev (i_major, i_minor)))
176 error (1, errno, "%s", argv[optind]);
180 case 'c': /* `character' */
181 case 'u': /* `unbuffered' */
183 error (4, 0, _("character special files not supported"));
185 if (argc - optind != 4)
188 when creating character special files, major and minor device\n\
189 numbers must be specified"));
193 s = argv[optind + 2];
194 if (xstrtol (s, NULL, 0, &tmp_major, NULL) != LONGINT_OK)
195 error (1, 0, _("invalid major device number `%s'"), s);
197 s = argv[optind + 3];
198 if (xstrtol (s, NULL, 0, &tmp_minor, NULL) != LONGINT_OK)
199 error (1, 0, _("invalid minor device number `%s'"), s);
201 i_major = (int) tmp_major;
202 i_minor = (int) tmp_minor;
204 if (mknod (argv[optind], newmode | S_IFCHR, makedev (i_major, i_minor)))
205 error (1, errno, "%s", argv[optind]);
209 case 'p': /* `pipe' */
211 error (4, 0, _("fifo files not supported"));
213 if (argc - optind != 2)
216 major and minor device numbers may not be specified for fifo files"));
219 if (mkfifo (argv[optind], newmode))
220 error (1, errno, "%s", argv[optind]);