571 lines
13 KiB
C
571 lines
13 KiB
C
/* $NetBSD: mount.c,v 1.44 1998/08/25 19:18:16 ross Exp $ */
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/*
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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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) 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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#else
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__RCSID("$NetBSD: mount.c,v 1.44 1998/08/25 19:18:16 ross Exp $");
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#endif
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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/wait.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 "pathnames.h"
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int debug, verbose;
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int checkvfsname __P((const char *, const char **));
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void catopt __P((char **, const char *));
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struct statfs
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*getmntpt __P((const char *));
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int hasopt __P((const char *, const char *));
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const char
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**makevfslist __P((char *));
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static void
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mangle __P((char *, int *, const char ***, int *));
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int mountfs __P((const char *, const char *, const char *,
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int, const char *, const char *, int));
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void prmount __P((struct statfs *));
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void usage __P((void));
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int main __P((int, char *[]));
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/* Map from mount otions to printable formats. */
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static struct opt {
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int o_opt;
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int o_silent;
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const char *o_name;
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} optnames[] = {
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{ MNT_ASYNC, 0, "asynchronous" },
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{ MNT_DEFEXPORTED, 1, "exported to the world" },
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{ MNT_EXKERB, 1, "kerberos uid mapping" },
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{ MNT_EXPORTED, 0, "NFS exported" },
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{ MNT_EXPORTANON, 1, "anon uid mapping" },
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{ MNT_EXRDONLY, 1, "exported read-only" },
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{ MNT_LOCAL, 0, "local" },
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{ MNT_NOATIME, 0, "noatime" },
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{ MNT_NOCOREDUMP, 0, "nocoredump" },
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{ MNT_NODEV, 0, "nodev" },
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{ MNT_NOEXEC, 0, "noexec" },
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{ MNT_NOSUID, 0, "nosuid" },
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{ MNT_QUOTA, 0, "with quotas" },
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{ MNT_RDONLY, 0, "read-only" },
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{ MNT_ROOTFS, 1, "root file system" },
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{ MNT_SYMPERM, 0, "symperm" },
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{ MNT_SYNCHRONOUS, 0, "synchronous" },
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{ MNT_UNION, 0, "union" },
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{ 0 }
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};
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static char ffs_fstype[] = "ffs";
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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const char *mntfromname, *mntonname, **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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int all, ch, forceall, i, init_flags, mntsize, rval;
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char *options;
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const char *mountopts, *fstypename;
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all = forceall = init_flags = 0;
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options = NULL;
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vfslist = NULL;
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vfstype = ffs_fstype;
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while ((ch = getopt(argc, argv, "Aadfo:rwt:uv")) != -1)
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switch (ch) {
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case 'A':
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all = forceall = 1;
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break;
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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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catopt(&options, optarg);
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break;
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case 'r':
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init_flags |= MNT_RDONLY;
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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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init_flags &= ~MNT_RDONLY;
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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 (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 (mountfs(fs->fs_vfstype, fs->fs_spec,
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fs->fs_file, init_flags, options,
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fs->fs_mntops, !forceall))
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rval = 1;
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}
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else {
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if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
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err(1, "getmntinfo");
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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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/* NOTREACHED */
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case 1:
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if (vfslist != NULL) {
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usage();
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/* NOTREACHED */
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}
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if (init_flags & MNT_UPDATE) {
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if ((mntbuf = getmntpt(*argv)) == NULL)
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errx(1,
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"unknown special file or file system %s.",
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*argv);
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if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
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mntfromname = fs->fs_spec;
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/* ignore the fstab file options. */
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fs->fs_mntops = NULL;
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} else
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mntfromname = mntbuf->f_mntfromname;
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mntonname = mntbuf->f_mntonname;
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fstypename = mntbuf->f_fstypename;
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mountopts = NULL;
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} else {
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if ((fs = getfsfile(*argv)) == NULL &&
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(fs = getfsspec(*argv)) == NULL)
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errx(1,
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"%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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mntfromname = fs->fs_spec;
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mntonname = fs->fs_file;
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fstypename = fs->fs_vfstype;
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mountopts = fs->fs_mntops;
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}
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rval = mountfs(fstypename, mntfromname,
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mntonname, init_flags, options, mountopts, 0);
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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, and spec contains either
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* a ':' or a '@' then assume that an NFS filesystem is being
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* specified ala Sun.
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*/
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if (vfslist == NULL && strpbrk(argv[0], ":@") != NULL)
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vfstype = "nfs";
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rval = mountfs(vfstype,
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argv[0], argv[1], init_flags, options, NULL, 0);
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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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int pid;
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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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/* NOTREACHED */
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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, skipmounted)
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const char *vfstype, *spec, *name, *options, *mntopts;
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int flags, skipmounted;
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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, **edir;
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struct statfs *sfp, sf;
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pid_t pid;
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int argc, numfs, i, status, maxargc;
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char *optbuf, execname[MAXPATHLEN + 1], execbase[MAXPATHLEN],
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mntpath[MAXPATHLEN];
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#ifdef __GNUC__
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(void) &name;
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(void) &optbuf;
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(void) &vfstype;
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#endif
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if (realpath(name, mntpath) == NULL) {
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warn("realpath %s", name);
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return (1);
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}
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name = mntpath;
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optbuf = NULL;
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if (mntopts)
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catopt(&optbuf, mntopts);
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if (options)
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catopt(&optbuf, options);
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if (!mntopts && !options)
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catopt(&optbuf, "rw");
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if (!strcmp(name, "/"))
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flags |= MNT_UPDATE;
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else if (skipmounted) {
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if ((numfs = getmntinfo(&sfp, MNT_WAIT)) == 0) {
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warn("getmntinfo");
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return (1);
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}
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for(i = 0; i < numfs; i++) {
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/* XXX can't check f_mntfromname,
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thanks to mfs, union, etc. */
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if (strncmp(name, sfp[i].f_mntonname, MNAMELEN) == 0 &&
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strncmp(vfstype, sfp[i].f_fstypename,
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MFSNAMELEN) == 0) {
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if (verbose)
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(void)printf("%s on %s type %.*s: %s\n",
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sfp[i].f_mntfromname,
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sfp[i].f_mntonname,
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MFSNAMELEN,
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sfp[i].f_fstypename,
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"already mounted");
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return (0);
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}
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}
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}
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if (flags & MNT_FORCE)
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catopt(&optbuf, "force");
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if (flags & MNT_RDONLY)
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catopt(&optbuf, "ro");
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if (flags & MNT_UPDATE) {
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catopt(&optbuf, "update");
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/* Figure out the fstype only if we defaulted to ffs */
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if (vfstype == ffs_fstype && statfs(name, &sf) != -1)
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vfstype = sf.f_fstypename;
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}
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maxargc = 64;
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argv = malloc(sizeof(char *) * maxargc);
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(void) snprintf(execbase, sizeof(execbase), "mount_%s", vfstype);
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argc = 0;
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argv[argc++] = execbase;
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if (optbuf)
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mangle(optbuf, &argc, &argv, &maxargc);
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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 (verbose) {
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(void)printf("exec:");
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for (i = 0; i < argc; i++)
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(void)printf(" %s", argv[i]);
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(void)printf("\n");
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}
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switch (pid = vfork()) {
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case -1: /* Error. */
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warn("vfork");
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if (optbuf)
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free(optbuf);
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return (1);
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case 0: /* Child. */
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if (debug)
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_exit(0);
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/* Go find an executable. */
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edir = edirs;
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do {
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(void)snprintf(execname,
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sizeof(execname), "%s/%s", *edir, execbase);
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(void)execv(execname, (char * const *)argv);
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if (errno != ENOENT)
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warn("exec %s for %s", execname, name);
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} while (*++edir != NULL);
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if (errno == ENOENT)
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warnx("%s not found for %s", execbase, name);
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_exit(1);
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/* NOTREACHED */
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default: /* Parent. */
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if (optbuf)
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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, strsignal(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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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;
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struct opt *o;
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struct passwd *pw;
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int f;
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(void)printf("%s on %s type %.*s", sfp->f_mntfromname, sfp->f_mntonname,
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MFSNAMELEN, sfp->f_fstypename);
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flags = sfp->f_flags & MNT_VISFLAGMASK;
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for (f = 0, o = optnames; flags && o->o_opt; o++)
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if (flags & o->o_opt) {
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if (!o->o_silent)
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(void)printf("%s%s", !f++ ? " (" : ", ",
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o->o_name);
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flags &= ~o->o_opt;
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}
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if (flags)
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(void)printf("%sunknown flag%s %#x", !f++ ? " (" : ", ",
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flags & (flags - 1) ? "s" : "", flags);
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if (sfp->f_owner) {
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(void)printf("%smounted by ", !f++ ? " (" : ", ");
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if ((pw = getpwuid(sfp->f_owner)) != NULL)
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(void)printf("%s", pw->pw_name);
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else
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(void)printf("%d", sfp->f_owner);
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}
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(void)printf(f ? ")\n" : "\n");
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}
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struct statfs *
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getmntpt(name)
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const char *name;
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{
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struct statfs *mntbuf;
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int i, mntsize;
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mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
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for (i = 0; i < mntsize; i++)
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if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
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strcmp(mntbuf[i].f_mntonname, name) == 0)
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return (&mntbuf[i]);
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return (NULL);
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}
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void
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catopt(sp, o)
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char **sp;
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const char *o;
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{
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char *s;
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size_t i, j;
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s = *sp;
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if (s) {
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i = strlen(s);
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j = i + 1 + strlen(o) + 1;
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s = realloc(s, j);
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(void)snprintf(s + i, j, ",%s", o);
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} else
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s = strdup(o);
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*sp = s;
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}
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static void
|
|
mangle(options, argcp, argvp, maxargcp)
|
|
char *options;
|
|
int *argcp, *maxargcp;
|
|
const char ***argvp;
|
|
{
|
|
char *p, *s;
|
|
int argc, maxargc;
|
|
const char **argv;
|
|
|
|
argc = *argcp;
|
|
argv = *argvp;
|
|
maxargc = *maxargcp;
|
|
|
|
for (s = options; (p = strsep(&s, ",")) != NULL;) {
|
|
/* Always leave space for one more argument and the NULL. */
|
|
if (argc >= maxargc - 4) {
|
|
maxargc <<= 1;
|
|
argv = realloc(argv, maxargc * sizeof(char *));
|
|
}
|
|
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;
|
|
*argvp = argv;
|
|
*maxargcp = maxargc;
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
|
|
(void)fprintf(stderr,
|
|
"usage: mount %s %s\n mount %s\n mount %s\n",
|
|
"[-dfruvw] [-o options] [-t ffs | external_type]",
|
|
"special node",
|
|
"[-adfruvw] [-t ffs | external_type]",
|
|
"[-dfruvw] special | node");
|
|
exit(1);
|
|
/* NOTREACHED */
|
|
}
|