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b6cf6bb275
found when the user specifies "mount -t type". Instead of printing out one message for each path element (/sbin, /usr/sbin), it prints out: mount: exec mount_type not found in /sbin, /usr/sbin: No such file or directory The code is quite long for such a stupid little piece of aesthesism but it is very straghtforward so I guess it's ok. Besides, I don't want to do a "char foo[100];" and have malloc break down when someone decides to add a few more paths to a variable that's far apart from this code. :) By the way, there is no malloc() off-by-one error for the '\0' at the end of the string although I don't explicitly add 1 to the length. The code allocates strlen(path element)+2 bytes for each path element, and doesn't use the last two bytes (for the delimiting ", "). Reviewed by: the list (I hope)
539 lines
12 KiB
C
539 lines
12 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 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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static char sccsid[] = "@(#)mount.c 8.19 (Berkeley) 4/19/94";
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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 <sys/types.h>
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#include <sys/stat.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 <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, skipvfs;
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int badvfsname __P((const char *, const char **));
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int badvfstype __P((int, const char **));
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char *catopt __P((char *, const char *));
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struct statfs
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*getmntpt __P((const char *));
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const char
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**makevfslist __P((char *));
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void mangle __P((char *, int *, const char **));
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int mountfs __P((const char *, const char *, const char *,
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int, const char *, const char *));
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void prmount __P((const char *, const char *, int));
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void usage __P((void));
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/* From mount_ufs.c. */
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int mount_ufs __P((int, char * const *));
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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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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_NODEV, "nodev" },
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{ MNT_NOEXEC, "noexec" },
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{ MNT_NOSUID, "nosuid" },
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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_USER, "user mount" },
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{ NULL }
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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 *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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pid_t pid;
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int all, ch, i, init_flags, mntsize, rval;
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char *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:rwt:uv")) != EOF)
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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 '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 (badvfsname(fs->fs_vfstype, vfslist))
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continue;
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if (strstr(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))
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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 (badvfstype(mntbuf[i].f_type, vfslist))
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continue;
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prmount(mntbuf[i].f_mntfromname,
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mntbuf[i].f_mntonname, mntbuf[i].f_flags);
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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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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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errx(1, "can't find fstab entry for %s.",
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*argv);
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/* If it's an update, ignore the fstab file options. */
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fs->fs_mntops = NULL;
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mntonname = mntbuf->f_mntonname;
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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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mntonname = fs->fs_file;
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}
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rval = mountfs(fs->fs_vfstype, fs->fs_spec,
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mntonname, 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, 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);
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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, "%ld", &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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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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struct stat sb;
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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 (realpath(name, mntpath) != NULL && stat(mntpath, &sb) == 0) {
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if (!S_ISDIR(sb.st_mode)) {
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warnx("%s: Not a directory", mntpath);
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return (1);
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}
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} else {
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warn("%s", mntpath);
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return (1);
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}
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if (mntopts == NULL)
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mntopts = "";
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name = mntpath;
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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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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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* optimisation 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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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 = vfork()) {
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case -1: /* Error. */
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warn("vfork");
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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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warn(NULL);
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exit(1);
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}
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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("%s", name);
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return (1);
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}
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prmount(sf.f_mntfromname, sf.f_mntonname, sf.f_flags);
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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(spec, name, flags)
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const char *spec, *name;
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int flags;
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{
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struct opt *o;
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int f;
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(void)printf("%s on %s", spec, name);
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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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(void)printf("%s%s", !f++ ? " (" : ", ", o->o_name);
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flags &= ~o->o_opt;
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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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int
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badvfsname(vfsname, vfslist)
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const char *vfsname;
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const char **vfslist;
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{
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if (vfslist == NULL)
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return (0);
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while (*vfslist != NULL) {
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if (strcmp(vfsname, *vfslist) == 0)
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return (skipvfs);
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++vfslist;
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}
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return (!skipvfs);
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}
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int
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badvfstype(vfstype, vfslist)
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int vfstype;
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const char **vfslist;
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{
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struct vfsconf *vfc;
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vfc = getvfsbytype(vfstype);
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if ( ! vfc )
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return (0);
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return (badvfsname(vfc->vfc_name, vfslist));
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}
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const char **
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makevfslist(fslist)
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char *fslist;
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{
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const char **av;
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int i;
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char *nextcp;
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if (fslist == NULL)
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return (NULL);
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if (fslist[0] == 'n' && fslist[1] == 'o') {
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fslist += 2;
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skipvfs = 1;
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}
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for (i = 0, nextcp = fslist; *nextcp; nextcp++)
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if (*nextcp == ',')
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i++;
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if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) {
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warn(NULL);
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return (NULL);
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}
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nextcp = fslist;
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i = 0;
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av[i++] = nextcp;
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while ((nextcp = strchr(nextcp, ',')) != NULL) {
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*nextcp++ = '\0';
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av[i++] = nextcp;
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}
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av[i++] = NULL;
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return (av);
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}
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char *
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catopt(s0, s1)
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char *s0;
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const char *s1;
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{
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size_t i;
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char *cp;
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if (s0 && *s0) {
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i = strlen(s0) + strlen(s1) + 1 + 1;
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if ((cp = malloc(i)) == NULL)
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err(1, NULL);
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(void)snprintf(cp, i, "%s,%s", s0, s1);
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} else
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cp = strdup(s1);
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if (s0)
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free(s0);
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return (cp);
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}
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void
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mangle(options, argcp, argv)
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char *options;
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int *argcp;
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const char **argv;
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{
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char *p, *s;
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int argc;
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argc = *argcp;
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for (s = options; (p = strsep(&s, ",")) != NULL;)
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if (*p != '\0')
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if (*p == '-') {
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argv[argc++] = p;
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p = strchr(p, '=');
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if (p) {
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*p = '\0';
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argv[argc++] = p+1;
|
|
}
|
|
} else if (strcmp(p, "rw") != 0) {
|
|
argv[argc++] = "-o";
|
|
argv[argc++] = p;
|
|
}
|
|
|
|
*argcp = argc;
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
|
|
(void)fprintf(stderr,
|
|
"usage: mount %s %s\n mount %s\n mount %s\n",
|
|
"[-dfruvw] [-o options] [-t ufs | external_type]",
|
|
"special node",
|
|
"[-adfruvw] [-t ufs | external_type]",
|
|
"[-dfruvw] special | node");
|
|
exit(1);
|
|
}
|