1 /* $NetBSD: mount_tmpfs.c,v 1.24 2008/08/05 20:57:45 pooka Exp $ */
4 * Copyright (c) 2005, 2006 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/param.h>
34 #include <sys/mount.h>
37 #include <vfs/tmpfs/tmpfs_args.h>
54 #include "mount_tmpfs.h"
56 /* --------------------------------------------------------------------- */
58 #define MOPT_TMPFSOPTS \
59 { "gid=", 0, MNT_GID, 1}, \
60 { "uid=", 0, MNT_UID, 1}, \
61 { "mode=", 0, MNT_MODE, 1}, \
62 { "inodes=", 0, MNT_INODES, 1}, \
63 { "size=", 0, MNT_SIZE, 1}, \
64 { "maxfilesize=", 0, MNT_MAXFSIZE, 1}
67 static const struct mntopt mopts[] = {
75 /* --------------------------------------------------------------------- */
77 static gid_t a_gid(char *);
78 static uid_t a_uid(char *);
79 static mode_t a_mask(char *);
80 static int64_t a_number(char *s);
81 static void usage(void) __dead2;
83 /* --------------------------------------------------------------------- */
86 mount_tmpfs_parseargs(int argc, char *argv[],
87 struct tmpfs_args *args, int *mntflags,
88 char *canon_dev, char *canon_dir)
90 int gidset, modeset, uidset; /* Ought to be 'bool'. */
99 /* Set default values for mount point arguments. */
100 memset(args, 0, sizeof(*args));
101 args->ta_version = TMPFS_ARGS_VERSION;
102 args->ta_size_max = 0;
103 args->ta_nodes_max = 0;
104 args->ta_maxfsize_max = 0;
109 modeset = 0; mode = 0;
111 optind = optreset = 1;
112 while ((ch = getopt(argc, argv, "Cf:g:m:n:o:s:u:")) != -1 ) {
118 args->ta_maxfsize_max = a_number(optarg);
127 mode = a_mask(optarg);
132 args->ta_nodes_max = a_number(optarg);
136 getmntopts(optarg, mopts, mntflags, &extend_flags);
137 if (extend_flags & MNT_GID) {
138 ptr = strstr(optarg, "gid=");
140 delim = strstr(ptr, ",");
143 gid = a_gid(ptr + 4);
146 gid = a_gid(ptr + 4);
149 extend_flags ^= MNT_GID;
151 if (extend_flags & MNT_UID) {
152 ptr = strstr(optarg, "uid=");
154 delim = strstr(ptr, ",");
157 uid = a_uid(ptr + 4);
160 uid = a_uid(ptr + 4);
163 extend_flags ^= MNT_UID;
165 if (extend_flags & MNT_MODE) {
166 ptr = strstr(optarg, "mode=");
168 delim = strstr(ptr, ",");
171 mode = a_mask(ptr + 5);
174 mode = a_mask(ptr + 5);
177 extend_flags ^= MNT_MODE;
179 if (extend_flags & MNT_INODES) {
180 ptr = strstr(optarg, "inodes=");
182 delim = strstr(ptr, ",");
185 args->ta_nodes_max = a_number(ptr + 7);
188 args->ta_nodes_max = a_number(ptr + 7);
190 extend_flags ^= MNT_INODES;
192 if (extend_flags & MNT_SIZE) {
193 ptr = strstr(optarg, "size=");
195 delim = strstr(ptr, ",");
198 args->ta_size_max = a_number(ptr + 5);
201 args->ta_size_max = a_number(ptr + 5);
203 extend_flags ^= MNT_SIZE;
205 if (extend_flags & MNT_MAXFSIZE) {
206 ptr = strstr(optarg, "maxfilesize=");
208 delim = strstr(ptr, ",");
211 args->ta_maxfsize_max = a_number(ptr + 12);
214 args->ta_maxfsize_max = a_number(ptr + 12);
216 extend_flags ^= MNT_MAXFSIZE;
221 args->ta_size_max = a_number(optarg);
240 strlcpy(canon_dev, argv[0], MAXPATHLEN);
241 strlcpy(canon_dir, argv[1], MAXPATHLEN);
243 if (stat(canon_dir, &sb) == -1)
244 err(EXIT_FAILURE, "cannot stat `%s'", canon_dir);
246 args->ta_root_uid = uidset ? uid : sb.st_uid;
247 args->ta_root_gid = gidset ? gid : sb.st_gid;
248 args->ta_root_mode = modeset ? mode : sb.st_mode;
251 /* --------------------------------------------------------------------- */
260 if ((gr = getgrnam(s)) != NULL)
263 for (gname = s; *s && isdigit(*s); ++s);
267 errx(EX_NOUSER, "unknown group id: %s", gname);
279 if ((pw = getpwnam(s)) != NULL)
282 for (uname = s; *s && isdigit(*s); ++s);
286 errx(EX_NOUSER, "unknown user id: %s", uname);
298 if (*s >= '0' && *s <= '7') {
300 rv = strtol(s, &ep, 8);
302 if (!done || rv < 0 || *ep)
303 errx(EX_USAGE, "invalid file mode: %s", s);
312 if (dehumanize_number(s, &rv) < 0 || rv < 0)
313 errx(EX_USAGE, "bad number for option: %s", s);
321 "Usage: %s [-C] [-g group] [-m mode] [-n nodes] [-o options] [-s size]\n"
322 " [-u user] [-f maxfilesize] tmpfs mountpoint\n", getprogname());
326 /* --------------------------------------------------------------------- */
329 mount_tmpfs(int argc, char *argv[])
331 struct tmpfs_args args;
332 char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN];
336 fsnode_t copyroot = NULL, copyhlinks;
338 mount_tmpfs_parseargs(argc, argv, &args, &mntflags,
339 canon_dev, canon_dir);
341 error = getvfsbyname("tmpfs", &vfc);
342 if (error && vfsisloadable("tmpfs")) {
344 err(EX_OSERR, "vfsload(%s)", "tmpfs");
346 error = getvfsbyname("tmpfs", &vfc);
349 errx(EX_OSERR, "%s filesystem not available", "tmpfs");
352 copyroot = FSCopy(©hlinks, canon_dir);
354 if (mount(vfc.vfc_name, canon_dir, mntflags, &args) == -1)
355 err(EXIT_FAILURE, "tmpfs on %s", canon_dir);
358 FSPaste(canon_dir, copyroot, copyhlinks);
365 main(int argc, char *argv[])
367 setprogname(argv[0]);
368 return mount_tmpfs(argc, argv);