2 * Copyright (c) 1990, 1992 Jan-Simon Pendry
3 * Copyright (c) 1992, 1993, 1994
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 static const char copyright[] =
36 "@(#) Copyright (c) 1992, 1993, 1994\n\
37 The Regents of the University of California. All rights reserved.\n";
41 static const char rcsid[] =
45 #include <sys/param.h>
46 #include <sys/mount.h>
60 static struct mntopt mopts[] = {
66 static volatile sig_atomic_t caughtsig;
68 static void usage(void) __dead2;
82 char mntpath[MAXPATHLEN];
88 * mount(8) calls the mount programs with an argv[0] which is
89 * /just/ the file system name. So, if there is no underscore
90 * in argv[0], we assume that we are being called from mount(8)
91 * and that argv[0] is thus the name of the file system type.
93 fsname = strrchr(argv[0], '_');
95 if (strcmp(fsname, "_std") == 0)
96 errx(EX_USAGE, "argv[0] must end in _fsname");
103 while ((ch = getopt(argc, argv, "o:")) != -1)
106 getmntopts(optarg, mopts, &mntflags, 0);
118 /* resolve the mountpoint with realpath(3) */
119 (void)checkpath(argv[1], mntpath);
121 iov[0].iov_base = "fstype";
122 iov[0].iov_len = sizeof("fstype");
123 iov[1].iov_base = fsname;
124 iov[1].iov_len = strlen(iov[1].iov_base) + 1;
125 iov[2].iov_base = "fspath";
126 iov[2].iov_len = sizeof("fspath");
127 iov[3].iov_base = mntpath;
128 iov[3].iov_len = strlen(mntpath) + 1;
131 * nmount(2) would kill us with SIGSYS if the kernel doesn't have it.
132 * This design bug is inconvenient. We must catch the signal and not
133 * just ignore it because of a plain bug: nmount(2) would return
134 * EINVAL instead of the correct ENOSYS if the kernel doesn't have it
135 * and we don't let the signal kill us. EINVAL is too ambiguous.
136 * This bug in 4.4BSD-Lite1 was fixed in 4.4BSD-Lite2 but is still in
139 signal(SIGSYS, catchsig);
140 error = nmount(iov, 4, mntflags);
141 signal(SIGSYS, SIG_DFL);
144 * Try with the old mount syscall in the case
145 * this file system has not been converted yet,
146 * or the user didn't recompile his kernel.
148 if (error && (errno == EOPNOTSUPP || errno == ENOSYS || caughtsig))
149 error = mount(fsname, mntpath, mntflags, NULL);
159 (void)fprintf(stderr,
160 "usage: mount_%s [-o options] what_to_mount mount_point\n",