526ba6d32b
remove all the code which was trying to do so. This code was nasty in several ways, it was hiding the kernel bug where the kernel was unable to properly load a module, and it was quitting if it wasn't able to load the module. The consequence is that an ABI breakage of the vfsconf API would have broken *every* mount utility.
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 filesystem 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 filesystem 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("fstype");
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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 filesystem 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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