401 lines
8.7 KiB
C
401 lines
8.7 KiB
C
/* $NetBSD: mknod.c,v 1.34 2004/06/20 22:20:15 jmc Exp $ */
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/*-
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* Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1998 The NetBSD Foundation, Inc. All rights reserved.\n");
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__RCSID("$NetBSD: mknod.c,v 1.34 2004/06/20 22:20:15 jmc Exp $");
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#if !HAVE_NBTOOL_CONFIG_H
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#include <sys/sysctl.h>
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#endif
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#include <err.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <pwd.h>
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#include <grp.h>
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#include <string.h>
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#include <ctype.h>
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#include "pack_dev.h"
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static int gid_name(const char *, gid_t *);
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static portdev_t callPack(pack_t *, int, u_long *);
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int main(int, char *[]);
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static void usage(void);
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#ifdef KERN_DRIVERS
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static struct kinfo_drivers *kern_drivers;
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static int num_drivers;
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static void get_device_info(void);
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static void print_device_info(char **);
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static int major_from_name(const char *, mode_t);
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#endif
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#define MAXARGS 3 /* 3 for bsdos, 2 for rest */
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int
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main(int argc, char **argv)
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{
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char *name, *p;
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mode_t mode;
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portdev_t dev;
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pack_t *pack;
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u_long numbers[MAXARGS];
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int n, ch, fifo, hasformat;
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int r_flag = 0; /* force: delete existing entry */
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#ifdef KERN_DRIVERS
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int l_flag = 0; /* list device names and numbers */
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int major;
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#endif
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void *modes = 0;
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uid_t uid = -1;
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gid_t gid = -1;
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int rval;
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dev = 0;
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fifo = hasformat = 0;
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pack = pack_native;
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#ifdef KERN_DRIVERS
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while ((ch = getopt(argc, argv, "lrRF:g:m:u:")) != -1) {
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#else
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while ((ch = getopt(argc, argv, "rRF:g:m:u:")) != -1) {
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#endif
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switch (ch) {
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#ifdef KERN_DRIVERS
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case 'l':
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l_flag = 1;
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break;
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#endif
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case 'r':
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r_flag = 1;
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break;
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case 'R':
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r_flag = 2;
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break;
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case 'F':
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pack = pack_find(optarg);
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if (pack == NULL)
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errx(1, "invalid format: %s", optarg);
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hasformat++;
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break;
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case 'g':
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if (optarg[0] == '#') {
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gid = strtol(optarg + 1, &p, 10);
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if (*p == 0)
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break;
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}
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if (gid_name(optarg, &gid) == 0)
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break;
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gid = strtol(optarg, &p, 10);
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if (*p == 0)
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break;
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errx(1, "%s: invalid group name", optarg);
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case 'm':
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modes = setmode(optarg);
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if (modes == NULL)
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errx(1, "invalid mode: %s", optarg);
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break;
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case 'u':
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if (optarg[0] == '#') {
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uid = strtol(optarg + 1, &p, 10);
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if (*p == 0)
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break;
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}
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if (uid_from_user(optarg, &uid) == 0)
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break;
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uid = strtol(optarg, &p, 10);
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if (*p == 0)
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break;
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errx(1, "%s: invalid user name", optarg);
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default:
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case '?':
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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#ifdef KERN_DRIVERS
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if (l_flag) {
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print_device_info(argv);
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return 0;
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}
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#endif
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if (argc < 2 || argc > 10)
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usage();
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name = *argv;
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argc--;
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argv++;
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umask(mode = umask(0));
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mode = (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mode;
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if (argv[0][1] != '\0')
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goto badtype;
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switch (*argv[0]) {
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case 'c':
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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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if (hasformat)
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errx(1, "format is meaningless for fifos");
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mode |= S_IFIFO;
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fifo = 1;
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break;
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default:
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badtype:
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errx(1, "node type must be 'b', 'c' or 'p'.");
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}
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argc--;
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argv++;
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if (fifo) {
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if (argc != 0)
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usage();
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} else {
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if (argc < 1 || argc > MAXARGS)
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usage();
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}
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for (n = 0; n < argc; n++) {
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errno = 0;
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numbers[n] = strtoul(argv[n], &p, 0);
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if (*p == 0 && errno == 0)
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continue;
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#ifdef KERN_DRIVERS
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if (n == 0) {
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major = major_from_name(argv[0], mode);
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if (major != -1) {
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numbers[0] = major;
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continue;
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}
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if (!isdigit(*(unsigned char *)argv[0]))
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errx(1, "unknown driver: %s", argv[0]);
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}
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#endif
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errx(1, "invalid number: %s", argv[n]);
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}
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switch (argc) {
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case 0:
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dev = 0;
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break;
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case 1:
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dev = numbers[0];
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break;
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default:
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dev = callPack(pack, argc, numbers);
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break;
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}
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if (modes != NULL)
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mode = getmode(modes, mode);
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umask(0);
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rval = fifo ? mkfifo(name, mode) : mknod(name, mode, dev);
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if (rval < 0 && errno == EEXIST && r_flag) {
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struct stat sb;
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if (lstat(name, &sb) != 0 || (!fifo && sb.st_rdev != dev))
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sb.st_mode = 0;
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if ((sb.st_mode & S_IFMT) == (mode & S_IFMT)) {
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if (r_flag == 1)
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/* Ignore permissions and user/group */
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return 0;
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if (sb.st_mode != mode)
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rval = chmod(name, mode);
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else
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rval = 0;
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} else {
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unlink(name);
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rval = fifo ? mkfifo(name, mode)
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: mknod(name, mode, dev);
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}
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}
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if (rval < 0)
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err(1, "%s", name);
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if ((uid != -1 || gid != -1) && chown(name, uid, gid) == -1)
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/* XXX Should we unlink the files here? */
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warn("%s: uid/gid not changed", name);
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return 0;
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}
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static void
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usage(void)
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{
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const char *progname = getprogname();
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(void)fprintf(stderr,
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"usage: %s [-rR] [-F format] [-m mode] [-u user] [-g group]\n",
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progname);
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(void)fprintf(stderr,
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#ifdef KERN_DRIVERS
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" [ name [b | c] [major | driver] minor\n"
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#else
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" [ name [b | c] major minor\n"
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#endif
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" | name [b | c] major unit subunit\n"
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" | name [b | c] number\n"
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" | name p ]\n");
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#ifdef KERN_DRIVERS
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(void)fprintf(stderr, " %s -l [driver] ...\n", progname);
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#endif
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exit(1);
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}
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static int
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gid_name(const char *name, gid_t *gid)
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{
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struct group *g;
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g = getgrnam(name);
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if (!g)
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return -1;
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*gid = g->gr_gid;
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return 0;
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}
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static portdev_t
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callPack(pack_t *f, int n, u_long *numbers)
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{
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portdev_t d;
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const char *error = NULL;
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d = (*f)(n, numbers, &error);
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if (error != NULL)
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errx(1, "%s", error);
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return d;
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}
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#ifdef KERN_DRIVERS
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static void
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get_device_info(void)
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{
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static int mib[2] = {CTL_KERN, KERN_DRIVERS};
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size_t len;
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if (sysctl(mib, 2, NULL, &len, NULL, 0) != 0)
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err(1, "kern.drivers" );
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kern_drivers = malloc(len);
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if (kern_drivers == NULL)
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err(1, "malloc");
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if (sysctl(mib, 2, kern_drivers, &len, NULL, 0) != 0)
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err(1, "kern.drivers" );
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num_drivers = len / sizeof *kern_drivers;
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}
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static void
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print_device_info(char **names)
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{
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int i;
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struct kinfo_drivers *kd;
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if (kern_drivers == NULL)
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get_device_info();
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do {
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kd = kern_drivers;
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for (i = 0; i < num_drivers; kd++, i++) {
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if (*names && strcmp(*names, kd->d_name))
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continue;
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printf("%s", kd->d_name);
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if (kd->d_cmajor != -1)
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printf(" character major %d", kd->d_cmajor);
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if (kd->d_bmajor != -1)
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printf(" block major %d", kd->d_bmajor);
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printf("\n");
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}
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} while (*names && *++names);
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}
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static int
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major_from_name(const char *name, mode_t mode)
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{
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int i;
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struct kinfo_drivers *kd;
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if (kern_drivers == NULL)
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get_device_info();
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kd = kern_drivers;
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for (i = 0; i < num_drivers; kd++, i++) {
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if (strcmp(name, kd->d_name))
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continue;
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if (mode & S_IFCHR)
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return kd->d_cmajor;
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return kd->d_bmajor;
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}
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return -1;
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}
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#endif
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