kernel/arm: send SIGSEGV to processes
[minix3.git] / sbin / mknod / mknod.c
blob8241529238d5c7481057fdbd4002ee1297002230
1 /* $NetBSD: mknod.c,v 1.42 2014/08/22 22:28:50 mlelstv Exp $ */
3 /*-
4 * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
32 #if HAVE_NBTOOL_CONFIG_H
33 #include "nbtool_config.h"
34 #endif
36 #include <sys/cdefs.h>
37 #ifndef lint
38 __COPYRIGHT("@(#) Copyright (c) 1998\
39 The NetBSD Foundation, Inc. All rights reserved.");
40 __RCSID("$NetBSD: mknod.c,v 1.42 2014/08/22 22:28:50 mlelstv Exp $");
41 #endif /* not lint */
43 #include <sys/types.h>
44 #include <sys/stat.h>
45 #include <sys/param.h>
46 #if !HAVE_NBTOOL_CONFIG_H
47 #include <sys/sysctl.h>
48 #endif
50 #include <err.h>
51 #include <errno.h>
52 #include <limits.h>
53 #include <stdio.h>
54 #include <stdlib.h>
55 #include <unistd.h>
56 #include <pwd.h>
57 #include <grp.h>
58 #include <string.h>
59 #include <ctype.h>
61 #include "pack_dev.h"
63 static int gid_name(const char *, gid_t *);
64 static dev_t callPack(pack_t *, int, u_long *);
66 __dead static void usage(void);
68 #ifdef KERN_DRIVERS
69 static struct kinfo_drivers *kern_drivers;
70 static int num_drivers;
72 static void get_device_info(void);
73 static void print_device_info(char **);
74 static int major_from_name(const char *, mode_t);
75 #endif
77 #define MAXARGS 3 /* 3 for bsdos, 2 for rest */
79 int
80 main(int argc, char **argv)
82 char *name, *p;
83 mode_t mode;
84 dev_t dev;
85 pack_t *pack;
86 u_long numbers[MAXARGS];
87 int n, ch, fifo, hasformat;
88 int r_flag = 0; /* force: delete existing entry */
89 #ifdef KERN_DRIVERS
90 int l_flag = 0; /* list device names and numbers */
91 int major;
92 #endif
93 void *modes = 0;
94 uid_t uid = -1;
95 gid_t gid = -1;
96 int rval;
98 dev = 0;
99 fifo = hasformat = 0;
100 pack = pack_native;
102 #ifdef KERN_DRIVERS
103 while ((ch = getopt(argc, argv, "lrRF:g:m:u:")) != -1) {
104 #else
105 while ((ch = getopt(argc, argv, "rRF:g:m:u:")) != -1) {
106 #endif
107 switch (ch) {
109 #ifdef KERN_DRIVERS
110 case 'l':
111 l_flag = 1;
112 break;
113 #endif
115 case 'r':
116 r_flag = 1;
117 break;
119 case 'R':
120 r_flag = 2;
121 break;
123 case 'F':
124 pack = pack_find(optarg);
125 if (pack == NULL)
126 errx(1, "invalid format: %s", optarg);
127 hasformat++;
128 break;
130 case 'g':
131 if (optarg[0] == '#') {
132 gid = strtol(optarg + 1, &p, 10);
133 if (*p == 0)
134 break;
136 if (gid_name(optarg, &gid) == 0)
137 break;
138 gid = strtol(optarg, &p, 10);
139 if (*p == 0)
140 break;
141 errx(1, "%s: invalid group name", optarg);
143 case 'm':
144 modes = setmode(optarg);
145 if (modes == NULL)
146 err(1, "Cannot set file mode `%s'", optarg);
147 break;
149 case 'u':
150 if (optarg[0] == '#') {
151 uid = strtol(optarg + 1, &p, 10);
152 if (*p == 0)
153 break;
155 if (uid_from_user(optarg, &uid) == 0)
156 break;
157 uid = strtol(optarg, &p, 10);
158 if (*p == 0)
159 break;
160 errx(1, "%s: invalid user name", optarg);
162 default:
163 case '?':
164 usage();
167 argc -= optind;
168 argv += optind;
170 #ifdef KERN_DRIVERS
171 if (l_flag) {
172 print_device_info(argv);
173 return 0;
175 #endif
177 if (argc < 2 || argc > 10)
178 usage();
180 name = *argv;
181 argc--;
182 argv++;
184 umask(mode = umask(0));
185 mode = (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mode;
187 if (argv[0][1] != '\0')
188 goto badtype;
189 switch (*argv[0]) {
190 case 'c':
191 mode |= S_IFCHR;
192 break;
194 case 'b':
195 mode |= S_IFBLK;
196 break;
198 case 'p':
199 if (hasformat)
200 errx(1, "format is meaningless for fifos");
201 mode |= S_IFIFO;
202 fifo = 1;
203 break;
205 default:
206 badtype:
207 errx(1, "node type must be 'b', 'c' or 'p'.");
209 argc--;
210 argv++;
212 if (fifo) {
213 if (argc != 0)
214 usage();
215 } else {
216 if (argc < 1 || argc > MAXARGS)
217 usage();
220 for (n = 0; n < argc; n++) {
221 errno = 0;
222 numbers[n] = strtoul(argv[n], &p, 0);
223 if (*p == 0 && errno == 0)
224 continue;
225 #ifdef KERN_DRIVERS
226 if (argc == 2 && n == 0) {
227 major = major_from_name(argv[0], mode);
228 if (major != -1) {
229 numbers[0] = major;
230 continue;
232 if (!isdigit(*(unsigned char *)argv[0]))
233 errx(1, "unknown driver: %s", argv[0]);
235 #endif
236 errx(1, "invalid number: %s", argv[n]);
239 switch (argc) {
240 case 0:
241 dev = 0;
242 break;
244 case 1:
245 dev = numbers[0];
246 break;
248 default:
249 dev = callPack(pack, argc, numbers);
250 break;
253 if (modes != NULL)
254 mode = getmode(modes, mode);
255 umask(0);
256 rval = fifo ? mkfifo(name, mode) : mknod(name, mode, dev);
257 if (rval < 0 && errno == EEXIST && r_flag) {
258 struct stat sb;
259 if (lstat(name, &sb) != 0 || (!fifo && sb.st_rdev != dev))
260 sb.st_mode = 0;
262 if ((sb.st_mode & S_IFMT) == (mode & S_IFMT)) {
263 if (r_flag == 1)
264 /* Ignore permissions and user/group */
265 return 0;
266 if (sb.st_mode != mode)
267 rval = chmod(name, mode);
268 else
269 rval = 0;
270 } else {
271 unlink(name);
272 rval = fifo ? mkfifo(name, mode)
273 : mknod(name, mode, dev);
276 if (rval < 0)
277 err(1, "%s", name);
278 if ((uid != (uid_t)-1 || gid != (uid_t)-1) && chown(name, uid, gid) == -1)
279 /* XXX Should we unlink the files here? */
280 warn("%s: uid/gid not changed", name);
282 return 0;
285 static void
286 usage(void)
288 const char *progname = getprogname();
290 (void)fprintf(stderr,
291 "usage: %s [-rR] [-F format] [-m mode] [-u user] [-g group]\n",
292 progname);
293 (void)fprintf(stderr,
294 #ifdef KERN_DRIVERS
295 " [ name [b | c] [major | driver] minor\n"
296 #else
297 " [ name [b | c] major minor\n"
298 #endif
299 " | name [b | c] major unit subunit\n"
300 " | name [b | c] number\n"
301 " | name p ]\n");
302 #ifdef KERN_DRIVERS
303 (void)fprintf(stderr, " %s -l [driver] ...\n", progname);
304 #endif
305 exit(1);
308 static int
309 gid_name(const char *name, gid_t *gid)
311 struct group *g;
313 g = getgrnam(name);
314 if (!g)
315 return -1;
316 *gid = g->gr_gid;
317 return 0;
320 static dev_t
321 callPack(pack_t *f, int n, u_long *numbers)
323 dev_t d;
324 const char *error = NULL;
326 d = (*f)(n, numbers, &error);
327 if (error != NULL)
328 errx(1, "%s", error);
329 return d;
332 #ifdef KERN_DRIVERS
333 static void
334 get_device_info(void)
336 static int mib[2] = {CTL_KERN, KERN_DRIVERS};
337 size_t len;
339 if (sysctl(mib, 2, NULL, &len, NULL, 0) != 0)
340 err(1, "kern.drivers" );
341 kern_drivers = malloc(len);
342 if (kern_drivers == NULL)
343 err(1, "malloc");
344 if (sysctl(mib, 2, kern_drivers, &len, NULL, 0) != 0)
345 err(1, "kern.drivers" );
347 num_drivers = len / sizeof *kern_drivers;
350 static void
351 print_device_info(char **names)
353 int i;
354 struct kinfo_drivers *kd;
356 if (kern_drivers == NULL)
357 get_device_info();
359 do {
360 kd = kern_drivers;
361 for (i = 0; i < num_drivers; kd++, i++) {
362 if (*names && strcmp(*names, kd->d_name))
363 continue;
364 printf("%s", kd->d_name);
365 if (kd->d_cmajor != -1)
366 printf(" character major %d", kd->d_cmajor);
367 if (kd->d_bmajor != -1)
368 printf(" block major %d", kd->d_bmajor);
369 printf("\n");
371 } while (*names && *++names);
374 static int
375 major_from_name(const char *name, mode_t mode)
377 int i;
378 struct kinfo_drivers *kd;
380 if (kern_drivers == NULL)
381 get_device_info();
383 kd = kern_drivers;
384 for (i = 0; i < num_drivers; kd++, i++) {
385 if (strcmp(name, kd->d_name))
386 continue;
387 if (S_ISCHR(mode))
388 return kd->d_cmajor;
389 return kd->d_bmajor;
391 return -1;
393 #endif