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- /* mknod -- make special files
- Copyright (C) 1990, 1991 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Usage: mknod [-m mode] [--mode=mode] path {bcu} major minor
- make a block or character device node
- mknod [-m mode] [--mode=mode] path p
- make a FIFO (named pipe)
-
- Options:
- -m, --mode=mode Set the mode of created nodes to MODE, which is
- symbolic as in chmod and uses the umask as a point of
- departure.
-
- David MacKenzie <djm@ai.mit.edu> */
-
- #include <stdio.h>
- #include <getopt.h>
- #include <sys/types.h>
- #include "system.h"
- #include "modechange.h"
-
- void error ();
- void strip_trailing_slashes ();
- void usage ();
-
- /* The name this program was run with. */
- char *program_name;
-
- struct option longopts[] =
- {
- {"mode", 1, NULL, 'm'},
- {NULL, 0, NULL, 0}
- };
-
- void
- main (argc, argv)
- int argc;
- char **argv;
- {
- unsigned short newmode;
- struct mode_change *change;
- char *symbolic_mode;
- int optc;
-
- program_name = argv[0];
- symbolic_mode = NULL;
-
- while ((optc = getopt_long (argc, argv, "m:", longopts, (int *) 0)) != EOF)
- {
- switch (optc)
- {
- case 'm':
- symbolic_mode = optarg;
- break;
- default:
- usage ();
- }
- }
-
- newmode = 0666 & ~umask (0);
- if (symbolic_mode)
- {
- change = mode_compile (symbolic_mode, 0);
- if (change == MODE_INVALID)
- error (1, 0, "invalid mode");
- else if (change == MODE_MEMORY_EXHAUSTED)
- error (1, 0, "virtual memory exhausted");
- newmode = mode_adjust (newmode, change);
- }
-
- if (argc - optind != 2 && argc - optind != 4)
- usage ();
-
- strip_trailing_slashes (argv[optind]);
-
- /* Only check the first character, to allow mnemonic usage like
- `mknod /dev/rst0 character 18 0'. */
-
- switch (argv[optind + 1][0])
- {
- case 'b': /* `block' or `buffered' */
- #ifndef S_IFBLK
- error (4, 0, "block special files not supported");
- #else
- if (argc - optind != 4)
- usage ();
- if (mknod (argv[optind], newmode | S_IFBLK,
- makedev (atoi (argv[optind + 2]), atoi (argv[optind + 3]))))
- error (1, errno, "%s", argv[optind]);
- #endif
- break;
-
- case 'c': /* `character' */
- case 'u': /* `unbuffered' */
- #ifndef S_IFCHR
- error (4, 0, "character special files not supported");
- #else
- if (argc - optind != 4)
- usage ();
- if (mknod (argv[optind], newmode | S_IFCHR,
- makedev (atoi (argv[optind + 2]), atoi (argv[optind + 3]))))
- error (1, errno, "%s", argv[optind]);
- #endif
- break;
-
- case 'p': /* `pipe' */
- #ifndef S_ISFIFO
- error (4, 0, "fifo files not supported");
- #else
- if (argc - optind != 2)
- usage ();
- if (mkfifo (argv[optind], newmode))
- error (1, errno, "%s", argv[optind]);
- #endif
- break;
-
- default:
- usage ();
- }
-
- exit (0);
- }
-
- void
- usage ()
- {
- fprintf (stderr, "\
- Usage: %s [-m mode] [--mode=mode] path {bcu} major minor\n\
- %s [-m mode] [--mode=mode] path p\n",
- program_name, program_name);
- exit (1);
- }
-