5502303d77
ID for each file system in addition to the normal information. In umount(8), accept filesystem IDs as well as the usual device and path names. This makes it possible to unambiguously specify which file system is to be unmounted even when two or more file systems share the same device and mountpoint names (e.g. NFS mounts from the same export into different chroots). Suggested by: Dan Nelson <dnelson@allantgroup.com>
759 lines
18 KiB
C
759 lines
18 KiB
C
/*-
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* Copyright (c) 1980, 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1989, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fstab.h>
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#include <paths.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "extern.h"
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#include "mntopts.h"
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#include "pathnames.h"
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/* `meta' options */
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#define MOUNT_META_OPTION_FSTAB "fstab"
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#define MOUNT_META_OPTION_CURRENT "current"
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int debug, fstab_style, verbose;
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char *catopt(char *, const char *);
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struct statfs *getmntpt(const char *);
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int hasopt(const char *, const char *);
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int ismounted(struct fstab *, struct statfs *, int);
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int isremountable(const char *);
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void mangle(char *, int *, const char **);
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char *update_options(char *, char *, int);
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int mountfs(const char *, const char *, const char *,
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int, const char *, const char *);
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void remopt(char *, const char *);
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void prmount(struct statfs *);
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void putfsent(const struct statfs *);
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void usage(void);
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char *flags2opts(int);
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/* Map from mount options to printable formats. */
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static struct opt {
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int o_opt;
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const char *o_name;
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} optnames[] = {
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{ MNT_ASYNC, "asynchronous" },
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{ MNT_EXPORTED, "NFS exported" },
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{ MNT_LOCAL, "local" },
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{ MNT_NOATIME, "noatime" },
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{ MNT_NODEV, "nodev" },
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{ MNT_NOEXEC, "noexec" },
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{ MNT_NOSUID, "nosuid" },
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{ MNT_NOSYMFOLLOW, "nosymfollow" },
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{ MNT_QUOTA, "with quotas" },
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{ MNT_RDONLY, "read-only" },
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{ MNT_SYNCHRONOUS, "synchronous" },
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{ MNT_UNION, "union" },
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{ MNT_NOCLUSTERR, "noclusterr" },
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{ MNT_NOCLUSTERW, "noclusterw" },
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{ MNT_SUIDDIR, "suiddir" },
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{ MNT_SOFTDEP, "soft-updates" },
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{ MNT_MULTILABEL, "multilabel" },
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{ MNT_ACLS, "acls" },
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{ 0, NULL }
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};
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/*
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* List of VFS types that can be remounted without becoming mounted on top
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* of each other.
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* XXX Is this list correct?
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*/
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static const char *
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remountable_fs_names[] = {
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"ufs", "ffs", "ext2fs",
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0
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};
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int
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main(argc, argv)
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int argc;
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char * const argv[];
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{
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const char *mntfromname, **vfslist, *vfstype;
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struct fstab *fs;
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struct statfs *mntbuf;
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FILE *mountdfp;
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pid_t pid;
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int all, ch, i, init_flags, mntsize, rval, have_fstab;
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char *cp, *ep, *options;
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all = init_flags = 0;
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options = NULL;
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vfslist = NULL;
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vfstype = "ufs";
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while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1)
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switch (ch) {
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case 'a':
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all = 1;
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break;
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case 'd':
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debug = 1;
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break;
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case 'F':
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setfstab(optarg);
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break;
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case 'f':
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init_flags |= MNT_FORCE;
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break;
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case 'o':
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if (*optarg)
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options = catopt(options, optarg);
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break;
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case 'p':
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fstab_style = 1;
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verbose = 1;
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break;
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case 'r':
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options = catopt(options, "ro");
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break;
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case 't':
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if (vfslist != NULL)
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errx(1, "only one -t option may be specified");
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vfslist = makevfslist(optarg);
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vfstype = optarg;
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break;
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case 'u':
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init_flags |= MNT_UPDATE;
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break;
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case 'v':
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verbose = 1;
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break;
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case 'w':
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options = catopt(options, "noro");
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break;
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case '?':
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default:
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usage();
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/* NOTREACHED */
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}
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argc -= optind;
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argv += optind;
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#define BADTYPE(type) \
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(strcmp(type, FSTAB_RO) && \
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strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
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rval = 0;
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switch (argc) {
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case 0:
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if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
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err(1, "getmntinfo");
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if (all) {
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while ((fs = getfsent()) != NULL) {
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if (BADTYPE(fs->fs_type))
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continue;
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if (checkvfsname(fs->fs_vfstype, vfslist))
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continue;
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if (hasopt(fs->fs_mntops, "noauto"))
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continue;
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if (!(init_flags & MNT_UPDATE) &&
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ismounted(fs, mntbuf, mntsize))
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continue;
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if (mountfs(fs->fs_vfstype, fs->fs_spec,
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fs->fs_file, init_flags, options,
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fs->fs_mntops))
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rval = 1;
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}
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} else if (fstab_style) {
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for (i = 0; i < mntsize; i++) {
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if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
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continue;
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putfsent(&mntbuf[i]);
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}
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} else {
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for (i = 0; i < mntsize; i++) {
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if (checkvfsname(mntbuf[i].f_fstypename,
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vfslist))
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continue;
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prmount(&mntbuf[i]);
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}
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}
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exit(rval);
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case 1:
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if (vfslist != NULL)
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usage();
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if (init_flags & MNT_UPDATE) {
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mntfromname = NULL;
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have_fstab = 0;
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if ((mntbuf = getmntpt(*argv)) == NULL)
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errx(1, "not currently mounted %s", *argv);
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/*
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* Only get the mntflags from fstab if both mntpoint
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* and mntspec are identical. Also handle the special
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* case where just '/' is mounted and 'spec' is not
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* identical with the one from fstab ('/dev' is missing
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* in the spec-string at boot-time).
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*/
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if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
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if (strcmp(fs->fs_spec,
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mntbuf->f_mntfromname) == 0 &&
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strcmp(fs->fs_file,
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mntbuf->f_mntonname) == 0) {
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have_fstab = 1;
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mntfromname = mntbuf->f_mntfromname;
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} else if (argv[0][0] == '/' &&
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argv[0][1] == '\0') {
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fs = getfsfile("/");
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have_fstab = 1;
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mntfromname = fs->fs_spec;
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}
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}
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if (have_fstab) {
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options = update_options(options, fs->fs_mntops,
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mntbuf->f_flags);
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} else {
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mntfromname = mntbuf->f_mntfromname;
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options = update_options(options, NULL,
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mntbuf->f_flags);
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}
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rval = mountfs(mntbuf->f_fstypename, mntfromname,
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mntbuf->f_mntonname, init_flags, options, 0);
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break;
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}
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rmslashes(*argv, *argv);
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if ((fs = getfsfile(*argv)) == NULL &&
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(fs = getfsspec(*argv)) == NULL)
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errx(1, "%s: unknown special file or file system",
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*argv);
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if (BADTYPE(fs->fs_type))
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errx(1, "%s has unknown file system type",
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*argv);
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rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
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init_flags, options, fs->fs_mntops);
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break;
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case 2:
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/*
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* If -t flag has not been specified, the path cannot be
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* found, spec contains either a ':' or a '@', then assume
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* that an NFS file system is being specified ala Sun.
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* Check if the hostname contains only allowed characters
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* to reduce false positives. IPv6 addresses containing
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* ':' will be correctly parsed only if the separator is '@'.
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* The definition of a valid hostname is taken from RFC 1034.
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*/
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if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL) ||
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((ep = strchr(argv[0], ':')) != NULL)) {
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if (*ep == '@') {
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cp = ep + 1;
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ep = cp + strlen(cp);
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} else
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cp = argv[0];
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while (cp != ep) {
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if (!isdigit(*cp) && !isalpha(*cp) &&
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*cp != '.' && *cp != '-' && *cp != ':')
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break;
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cp++;
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}
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if (cp == ep)
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vfstype = "nfs";
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}
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rval = mountfs(vfstype,
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argv[0], argv[1], init_flags, options, NULL);
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break;
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default:
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usage();
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/* NOTREACHED */
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}
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/*
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* If the mount was successfully, and done by root, tell mountd the
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* good news. Pid checks are probably unnecessary, but don't hurt.
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*/
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if (rval == 0 && getuid() == 0 &&
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(mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) {
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if (fscanf(mountdfp, "%d", &pid) == 1 &&
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pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH)
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err(1, "signal mountd");
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(void)fclose(mountdfp);
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}
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exit(rval);
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}
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int
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ismounted(fs, mntbuf, mntsize)
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struct fstab *fs;
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struct statfs *mntbuf;
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int mntsize;
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{
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int i;
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if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
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/* the root file system can always be remounted */
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return (0);
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for (i = mntsize - 1; i >= 0; --i)
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if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 &&
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(!isremountable(fs->fs_vfstype) ||
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strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
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return (1);
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return (0);
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}
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int
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isremountable(vfsname)
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const char *vfsname;
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{
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const char **cp;
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for (cp = remountable_fs_names; *cp; cp++)
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if (strcmp(*cp, vfsname) == 0)
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return (1);
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return (0);
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}
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int
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hasopt(mntopts, option)
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const char *mntopts, *option;
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{
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int negative, found;
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char *opt, *optbuf;
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if (option[0] == 'n' && option[1] == 'o') {
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negative = 1;
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option += 2;
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} else
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negative = 0;
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optbuf = strdup(mntopts);
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found = 0;
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for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
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if (opt[0] == 'n' && opt[1] == 'o') {
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if (!strcasecmp(opt + 2, option))
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found = negative;
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} else if (!strcasecmp(opt, option))
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found = !negative;
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}
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free(optbuf);
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return (found);
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}
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int
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mountfs(vfstype, spec, name, flags, options, mntopts)
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const char *vfstype, *spec, *name, *options, *mntopts;
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int flags;
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{
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const char *argv[100], **edir;
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char *path, *cur;
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struct statfs sf;
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pid_t pid;
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int argc, i, status;
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char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN];
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#if __GNUC__
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(void)&optbuf;
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(void)&name;
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#endif
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/* resolve the mountpoint with realpath(3) */
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(void)checkpath(name, mntpath);
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name = mntpath;
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if (mntopts == NULL)
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mntopts = "";
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if (options == NULL) {
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if (*mntopts == '\0') {
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options = "rw";
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} else {
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options = mntopts;
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mntopts = "";
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}
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}
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optbuf = catopt(strdup(mntopts), options);
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if (strcmp(name, "/") == 0)
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flags |= MNT_UPDATE;
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if (flags & MNT_FORCE)
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optbuf = catopt(optbuf, "force");
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if (flags & MNT_RDONLY)
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optbuf = catopt(optbuf, "ro");
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/*
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* XXX
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* The mount_mfs (newfs) command uses -o to select the
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* optimization mode. We don't pass the default "-o rw"
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* for that reason.
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*/
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if (flags & MNT_UPDATE)
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optbuf = catopt(optbuf, "update");
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/* Compatibility glue. */
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if (strcmp(vfstype, "msdos") == 0)
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vfstype = "msdosfs";
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argc = 0;
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argv[argc++] = vfstype;
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mangle(optbuf, &argc, argv);
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argv[argc++] = spec;
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argv[argc++] = name;
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argv[argc] = NULL;
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if (debug) {
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(void)printf("exec: mount_%s", vfstype);
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for (i = 1; i < argc; i++)
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(void)printf(" %s", argv[i]);
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(void)printf("\n");
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return (0);
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}
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switch (pid = fork()) {
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case -1: /* Error. */
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warn("fork");
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free(optbuf);
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return (1);
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case 0: /* Child. */
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if (strcmp(vfstype, "ufs") == 0)
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exit(mount_ufs(argc, (char * const *) argv));
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/* Go find an executable. */
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(void)snprintf(execname, sizeof(execname), "mount_%s", vfstype);
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execvP(execname, _PATH_SYSPATH, (char * const *)argv);
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if (errno == ENOENT) {
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warn("exec mount_%s not found in %s", vfstype, path);
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}
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exit(1);
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/* NOTREACHED */
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default: /* Parent. */
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free(optbuf);
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if (waitpid(pid, &status, 0) < 0) {
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warn("waitpid");
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return (1);
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}
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if (WIFEXITED(status)) {
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if (WEXITSTATUS(status) != 0)
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return (WEXITSTATUS(status));
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} else if (WIFSIGNALED(status)) {
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warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
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return (1);
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}
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if (verbose) {
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if (statfs(name, &sf) < 0) {
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warn("statfs %s", name);
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return (1);
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}
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if (fstab_style)
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putfsent(&sf);
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else
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prmount(&sf);
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}
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break;
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}
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return (0);
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}
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void
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prmount(sfp)
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struct statfs *sfp;
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{
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int flags, i;
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struct opt *o;
|
|
struct passwd *pw;
|
|
|
|
(void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
|
|
sfp->f_fstypename);
|
|
|
|
flags = sfp->f_flags & MNT_VISFLAGMASK;
|
|
for (o = optnames; flags && o->o_opt; o++)
|
|
if (flags & o->o_opt) {
|
|
(void)printf(", %s", o->o_name);
|
|
flags &= ~o->o_opt;
|
|
}
|
|
if (sfp->f_owner) {
|
|
(void)printf(", mounted by ");
|
|
if ((pw = getpwuid(sfp->f_owner)) != NULL)
|
|
(void)printf("%s", pw->pw_name);
|
|
else
|
|
(void)printf("%d", sfp->f_owner);
|
|
}
|
|
if (verbose) {
|
|
if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
|
|
(void)printf(", writes: sync %ld async %ld",
|
|
sfp->f_syncwrites, sfp->f_asyncwrites);
|
|
if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
|
|
(void)printf(", reads: sync %ld async %ld",
|
|
sfp->f_syncreads, sfp->f_asyncreads);
|
|
printf(", fsid ");
|
|
for (i = 0; i < sizeof(sfp->f_fsid); i++)
|
|
printf("%02x", ((u_char *)&sfp->f_fsid)[i]);
|
|
}
|
|
(void)printf(")\n");
|
|
}
|
|
|
|
struct statfs *
|
|
getmntpt(name)
|
|
const char *name;
|
|
{
|
|
struct statfs *mntbuf;
|
|
int i, mntsize;
|
|
|
|
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
|
|
for (i = mntsize - 1; i >= 0; i--) {
|
|
if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
|
|
strcmp(mntbuf[i].f_mntonname, name) == 0)
|
|
return (&mntbuf[i]);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
char *
|
|
catopt(s0, s1)
|
|
char *s0;
|
|
const char *s1;
|
|
{
|
|
size_t i;
|
|
char *cp;
|
|
|
|
if (s1 == NULL || *s1 == '\0')
|
|
return s0;
|
|
|
|
if (s0 && *s0) {
|
|
i = strlen(s0) + strlen(s1) + 1 + 1;
|
|
if ((cp = malloc(i)) == NULL)
|
|
errx(1, "malloc failed");
|
|
(void)snprintf(cp, i, "%s,%s", s0, s1);
|
|
} else
|
|
cp = strdup(s1);
|
|
|
|
if (s0)
|
|
free(s0);
|
|
return (cp);
|
|
}
|
|
|
|
void
|
|
mangle(options, argcp, argv)
|
|
char *options;
|
|
int *argcp;
|
|
const char **argv;
|
|
{
|
|
char *p, *s;
|
|
int argc;
|
|
|
|
argc = *argcp;
|
|
for (s = options; (p = strsep(&s, ",")) != NULL;)
|
|
if (*p != '\0') {
|
|
if (*p == '-') {
|
|
argv[argc++] = p;
|
|
p = strchr(p, '=');
|
|
if (p) {
|
|
*p = '\0';
|
|
argv[argc++] = p+1;
|
|
}
|
|
} else if (strcmp(p, "rw") != 0) {
|
|
argv[argc++] = "-o";
|
|
argv[argc++] = p;
|
|
}
|
|
}
|
|
|
|
*argcp = argc;
|
|
}
|
|
|
|
|
|
char *
|
|
update_options(opts, fstab, curflags)
|
|
char *opts;
|
|
char *fstab;
|
|
int curflags;
|
|
{
|
|
char *o, *p;
|
|
char *cur;
|
|
char *expopt, *newopt, *tmpopt;
|
|
|
|
if (opts == NULL)
|
|
return strdup("");
|
|
|
|
/* remove meta options from list */
|
|
remopt(fstab, MOUNT_META_OPTION_FSTAB);
|
|
remopt(fstab, MOUNT_META_OPTION_CURRENT);
|
|
cur = flags2opts(curflags);
|
|
|
|
/*
|
|
* Expand all meta-options passed to us first.
|
|
*/
|
|
expopt = NULL;
|
|
for (p = opts; (o = strsep(&p, ",")) != NULL;) {
|
|
if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
|
|
expopt = catopt(expopt, fstab);
|
|
else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
|
|
expopt = catopt(expopt, cur);
|
|
else
|
|
expopt = catopt(expopt, o);
|
|
}
|
|
free(cur);
|
|
free(opts);
|
|
|
|
/*
|
|
* Remove previous contradictory arguments. Given option "foo" we
|
|
* remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
|
|
* and "foo" - so we can deal with possible options like "notice".
|
|
*/
|
|
newopt = NULL;
|
|
for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
|
|
if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
|
|
errx(1, "malloc failed");
|
|
|
|
strcpy(tmpopt, "no");
|
|
strcat(tmpopt, o);
|
|
remopt(newopt, tmpopt);
|
|
free(tmpopt);
|
|
|
|
if (strncmp("no", o, 2) == 0)
|
|
remopt(newopt, o+2);
|
|
|
|
newopt = catopt(newopt, o);
|
|
}
|
|
free(expopt);
|
|
|
|
return newopt;
|
|
}
|
|
|
|
void
|
|
remopt(string, opt)
|
|
char *string;
|
|
const char *opt;
|
|
{
|
|
char *o, *p, *r;
|
|
|
|
if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
|
|
return;
|
|
|
|
r = string;
|
|
|
|
for (p = string; (o = strsep(&p, ",")) != NULL;) {
|
|
if (strcmp(opt, o) != 0) {
|
|
if (*r == ',' && *o != '\0')
|
|
r++;
|
|
while ((*r++ = *o++) != '\0')
|
|
;
|
|
*--r = ',';
|
|
}
|
|
}
|
|
*r = '\0';
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
|
|
(void)fprintf(stderr, "%s\n%s\n%s\n",
|
|
"usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node",
|
|
" mount [-adfpruvw] [ -F fstab] [-t ufs | external_type]",
|
|
" mount [-dfpruvw] special | node");
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
putfsent(ent)
|
|
const struct statfs *ent;
|
|
{
|
|
struct fstab *fst;
|
|
char *opts;
|
|
|
|
opts = flags2opts(ent->f_flags);
|
|
printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname,
|
|
ent->f_fstypename, opts);
|
|
free(opts);
|
|
|
|
if ((fst = getfsspec(ent->f_mntfromname)))
|
|
printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
|
|
else if ((fst = getfsfile(ent->f_mntonname)))
|
|
printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
|
|
else if (strcmp(ent->f_fstypename, "ufs") == 0) {
|
|
if (strcmp(ent->f_mntonname, "/") == 0)
|
|
printf("\t1 1\n");
|
|
else
|
|
printf("\t2 2\n");
|
|
} else
|
|
printf("\t0 0\n");
|
|
}
|
|
|
|
|
|
char *
|
|
flags2opts(flags)
|
|
int flags;
|
|
{
|
|
char *res;
|
|
|
|
res = NULL;
|
|
|
|
res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw");
|
|
|
|
if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync");
|
|
if (flags & MNT_NOEXEC) res = catopt(res, "noexec");
|
|
if (flags & MNT_NOSUID) res = catopt(res, "nosuid");
|
|
if (flags & MNT_NODEV) res = catopt(res, "nodev");
|
|
if (flags & MNT_UNION) res = catopt(res, "union");
|
|
if (flags & MNT_ASYNC) res = catopt(res, "async");
|
|
if (flags & MNT_NOATIME) res = catopt(res, "noatime");
|
|
if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr");
|
|
if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw");
|
|
if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow");
|
|
if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir");
|
|
if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel");
|
|
if (flags & MNT_ACLS) res = catopt(res, "acls");
|
|
|
|
return res;
|
|
}
|