768 lines
18 KiB
C
768 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 <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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{ 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, "adfo: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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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 filesystem 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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/* List of directories containing mount_xxx subcommands. */
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static const char *edirs[] = {
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_PATH_SBIN,
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_PATH_USRSBIN,
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NULL
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};
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const char *argv[100], **edir;
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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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for (edir = edirs; *edir; edir++) {
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(void)snprintf(execname,
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sizeof(execname), "%s/mount_%s", *edir, vfstype);
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execv(execname, (char * const *)argv);
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}
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if (errno == ENOENT) {
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int len = 0;
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char *cp;
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for (edir = edirs; *edir; edir++)
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len += strlen(*edir) + 2; /* ", " */
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if ((cp = malloc(len)) == NULL)
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errx(1, "malloc failed");
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cp[0] = '\0';
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for (edir = edirs; *edir; edir++) {
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strcat(cp, *edir);
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if (edir[1] != NULL)
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strcat(cp, ", ");
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}
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warn("exec mount_%s not found in %s", vfstype, cp);
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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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}
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
prmount(sfp)
|
|
struct statfs *sfp;
|
|
{
|
|
int flags;
|
|
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);
|
|
}
|
|
(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] [-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");
|
|
|
|
return res;
|
|
}
|