fd33bfb7f2
function for resolving paths. Make pathadj() no longer warn about symlinks. Symlinks in /dev are regularly used in several places like LVM . The warning was also only visible when calling a mount_* command directly as mount(8) itself would resolve the path witout warning before passing it to a mount_* command.
142 lines
3.8 KiB
C
142 lines
3.8 KiB
C
/* $NetBSD: mount_autofs.c,v 1.5 2020/07/26 08:20:22 mlelstv Exp $ */
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/*-
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* Copyright (c) 2018 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: mount_autofs.c,v 1.5 2020/07/26 08:20:22 mlelstv Exp $");
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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 <err.h>
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#include <unistd.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 <mntopts.h>
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#include <fs/autofs/autofs_mount.h>
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#include "mountprog.h"
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#include "mount_autofs.h"
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static const struct mntopt mopts[] = {
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MOPT_STDOPTS,
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MOPT_GETARGS,
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MOPT_NULL,
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};
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int mount_autofs(int argc, char **argv);
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__dead static void usage(void);
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#ifndef MOUNT_NOMAIN
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int
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main(int argc, char **argv)
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{
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return mount_autofs(argc, argv);
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}
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#endif
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void
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mount_autofs_parseargs(int argc, char *argv[], void *v, int *mntflags,
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char *canon_dev, char *canon_dir)
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{
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int ch;
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mntoptparse_t mp;
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struct autofs_args *am = v;
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*mntflags = 0;
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while ((ch = getopt(argc, argv, "f:o:O:p:")) != -1)
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switch (ch) {
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case 'f':
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strlcpy(am->from, optarg, MAXPATHLEN);
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break;
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case 'o':
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mp = getmntopts(optarg, mopts, mntflags, 0);
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if (mp == NULL)
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err(EXIT_FAILURE, "getmntopts");
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freemntopts(mp);
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break;
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case 'O':
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strlcpy(am->master_options, optarg, MAXPATHLEN);
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break;
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case 'p':
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strlcpy(am->master_prefix, optarg, MAXPATHLEN);
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 2)
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usage();
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strlcpy(canon_dev, argv[0], MAXPATHLEN);
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pathadj(argv[1], canon_dir);
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}
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int
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mount_autofs(int argc, char *argv[])
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{
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char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN];
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char from[MAXPATHLEN], master_options[MAXPATHLEN];
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char master_prefix[MAXPATHLEN];
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int mntflags;
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struct autofs_args am = {
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.from = from,
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.master_options = master_options,
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.master_prefix = master_prefix,
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};
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mount_autofs_parseargs(argc, argv, &am, &mntflags,
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canon_dev, canon_dir);
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if (mount(MOUNT_KERNFS, canon_dir, mntflags, &am, sizeof(am)) == -1)
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err(EXIT_FAILURE, "autofs on %s", canon_dir);
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if (mntflags & MNT_GETARGS) {
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printf("from=%s, master_options=%s, master_prefix=%s\n",
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am.from, am.master_options, am.master_prefix);
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}
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return EXIT_SUCCESS;
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"Usage: %s [-f from] [-O autofs_options] [-o options] [-p prefix] "
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"autofs mount_point\n", getprogname());
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exit(EXIT_FAILURE);
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}
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