168 lines
4.7 KiB
C
168 lines
4.7 KiB
C
/*
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* Copyright (c) 1990, 1992 Jan-Simon Pendry
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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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) 1992, 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 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/uio.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include "mntopts.h"
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static struct mntopt mopts[] = {
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MOPT_STDOPTS,
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{ NULL }
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};
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static char *fsname;
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static volatile sig_atomic_t caughtsig;
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static void usage(void) __dead2;
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static void
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catchsig(int s)
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{
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caughtsig = 1;
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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 *argv[];
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{
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int ch, mntflags;
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char mntpath[MAXPATHLEN];
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struct iovec iov[4];
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int error;
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/*
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* XXX
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* mount(8) calls the mount programs with an argv[0] which is
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* /just/ the file system name. So, if there is no underscore
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* in argv[0], we assume that we are being called from mount(8)
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* and that argv[0] is thus the name of the file system type.
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*/
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fsname = strrchr(argv[0], '_');
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if (fsname) {
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if (strcmp(fsname, "_std") == 0)
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errx(EX_USAGE, "argv[0] must end in _fsname");
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fsname++;
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} else {
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fsname = argv[0];
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}
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mntflags = 0;
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while ((ch = getopt(argc, argv, "o:")) != -1)
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switch (ch) {
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case 'o':
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getmntopts(optarg, mopts, &mntflags, 0);
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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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/* resolve the mountpoint with realpath(3) */
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(void)checkpath(argv[1], mntpath);
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iov[0].iov_base = "fstype";
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iov[0].iov_len = sizeof("fstype");
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iov[1].iov_base = fsname;
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iov[1].iov_len = strlen(iov[1].iov_base) + 1;
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iov[2].iov_base = "fspath";
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iov[2].iov_len = sizeof("fspath");
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iov[3].iov_base = mntpath;
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iov[3].iov_len = strlen(mntpath) + 1;
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/*
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* nmount(2) would kill us with SIGSYS if the kernel doesn't have it.
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* This design bug is inconvenient. We must catch the signal and not
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* just ignore it because of a plain bug: nmount(2) would return
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* EINVAL instead of the correct ENOSYS if the kernel doesn't have it
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* and we don't let the signal kill us. EINVAL is too ambiguous.
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* This bug in 4.4BSD-Lite1 was fixed in 4.4BSD-Lite2 but is still in
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* FreeBSD-5.0.
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*/
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signal(SIGSYS, catchsig);
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error = nmount(iov, 4, mntflags);
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signal(SIGSYS, SIG_DFL);
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/*
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* Try with the old mount syscall in the case
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* this file system has not been converted yet,
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* or the user didn't recompile his kernel.
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*/
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if (error && (errno == EOPNOTSUPP || errno == ENOSYS || caughtsig))
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error = mount(fsname, mntpath, mntflags, NULL);
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if (error)
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err(EX_OSERR, NULL);
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exit(0);
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}
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void
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usage()
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{
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(void)fprintf(stderr,
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"usage: mount_%s [-o options] what_to_mount mount_point\n",
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fsname);
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exit(EX_USAGE);
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}
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