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NetBSD/sbin/mount/mount.c

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/* $NetBSD: mount.c,v 1.16 1995/03/18 14:57:02 cgd Exp $ */
/*
* Copyright (c) 1980, 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1980, 1989, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)mount.c 8.19 (Berkeley) 4/19/94";
#else
static char rcsid[] = "$NetBSD: mount.c,v 1.16 1995/03/18 14:57:02 cgd Exp $";
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "pathnames.h"
int debug, verbose;
char **typelist = NULL;
int selected __P((const char *));
char *catopt __P((char *, const char *));
struct statfs
*getmntpt __P((const char *));
int hasopt __P((const char *, const char *));
void maketypelist __P((char *));
void mangle __P((char *, int *, const char **));
int mountfs __P((const char *, const char *, const char *,
int, const char *, const char *));
void prmount __P((struct statfs *));
void usage __P((void));
/* From mount_ufs.c. */
int mount_ufs __P((int, char * const *));
/* Map from mount otions to printable formats. */
static struct opt {
int o_opt;
const char *o_name;
} optnames[] = {
{ MNT_ASYNC, "asynchronous" },
{ MNT_EXPORTED, "NFS exported" },
{ MNT_LOCAL, "local" },
{ MNT_NODEV, "nodev" },
{ MNT_NOEXEC, "noexec" },
{ MNT_NOSUID, "nosuid" },
{ MNT_QUOTA, "with quotas" },
{ MNT_RDONLY, "read-only" },
{ MNT_SYNCHRONOUS, "synchronous" },
{ MNT_UNION, "union" },
{ NULL }
};
int
main(argc, argv)
int argc;
char * const argv[];
{
const char *mntonname, *vfstype;
struct fstab *fs;
struct statfs *mntbuf;
FILE *mountdfp;
pid_t pid;
int all, ch, i, init_flags, mntsize, rval;
char *options;
all = init_flags = 0;
options = NULL;
vfstype = "ufs";
while ((ch = getopt(argc, argv, "adfo:rwt:uv")) != EOF)
switch (ch) {
case 'a':
all = 1;
break;
case 'd':
debug = 1;
break;
case 'f':
init_flags |= MNT_FORCE;
break;
case 'o':
if (*optarg)
options = catopt(options, optarg);
break;
case 'r':
init_flags |= MNT_RDONLY;
break;
case 't':
if (typelist != NULL)
errx(1, "only one -t option may be specified.");
maketypelist(optarg);
vfstype = optarg;
break;
case 'u':
init_flags |= MNT_UPDATE;
break;
case 'v':
verbose = 1;
break;
case 'w':
init_flags &= ~MNT_RDONLY;
break;
case '?':
default:
usage();
/* NOTREACHED */
}
argc -= optind;
argv += optind;
#define BADTYPE(type) \
(strcmp(type, FSTAB_RO) && \
strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
rval = 0;
switch (argc) {
case 0:
if (all)
while ((fs = getfsent()) != NULL) {
if (BADTYPE(fs->fs_type))
continue;
if (!selected(fs->fs_vfstype))
continue;
if (hasopt(fs->fs_mntops, "noauto"))
continue;
if (mountfs(fs->fs_vfstype, fs->fs_spec,
fs->fs_file, init_flags, options,
fs->fs_mntops))
rval = 1;
}
else {
if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
err(1, "getmntinfo");
for (i = 0; i < mntsize; i++) {
if (!selected(mntbuf[i].f_fstypename))
continue;
prmount(&mntbuf[i]);
}
}
exit(rval);
case 1:
if (typelist != NULL)
usage();
if (init_flags & MNT_UPDATE) {
if ((mntbuf = getmntpt(*argv)) == NULL)
errx(1,
"unknown special file or file system %s.",
*argv);
if ((fs = getfsfile(mntbuf->f_mntonname)) == NULL)
errx(1, "can't find fstab entry for %s.",
*argv);
/* If it's an update, ignore the fstab file options. */
fs->fs_mntops = NULL;
mntonname = mntbuf->f_mntonname;
} else {
if ((fs = getfsfile(*argv)) == NULL &&
(fs = getfsspec(*argv)) == NULL)
errx(1,
"%s: unknown special file or file system.",
*argv);
if (BADTYPE(fs->fs_type))
errx(1, "%s has unknown file system type.",
*argv);
mntonname = fs->fs_file;
}
rval = mountfs(fs->fs_vfstype, fs->fs_spec,
mntonname, init_flags, options, fs->fs_mntops);
break;
case 2:
/*
* If -t flag has not been specified, and spec contains either
* a ':' or a '@' then assume that an NFS filesystem is being
* specified ala Sun.
*/
if (typelist == NULL && strpbrk(argv[0], ":@") != NULL)
vfstype = "nfs";
rval = mountfs(vfstype,
argv[0], argv[1], init_flags, options, NULL);
break;
default:
usage();
/* NOTREACHED */
}
/*
* If the mount was successfully, and done by root, tell mountd the
* good news. Pid checks are probably unnecessary, but don't hurt.
*/
if (rval == 0 && getuid() == 0 &&
(mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) {
if (fscanf(mountdfp, "%ld", &pid) == 1 &&
pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH)
err(1, "signal mountd");
(void)fclose(mountdfp);
}
exit(rval);
}
int
hasopt(mntopts, option)
const char *mntopts, *option;
{
int negative, found;
char *opt, *optbuf;
if (option[0] == 'n' && option[1] == 'o') {
negative = 1;
option += 2;
} else
negative = 0;
optbuf = strdup(mntopts);
found = 0;
for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
if (opt[0] == 'n' && opt[1] == 'o') {
if (!strcasecmp(opt + 2, option))
found = negative;
} else if (!strcasecmp(opt, option))
found = !negative;
}
free(optbuf);
return (found);
}
int
mountfs(vfstype, spec, name, flags, options, mntopts)
const char *vfstype, *spec, *name, *options, *mntopts;
int flags;
{
/* List of directories containing mount_xxx subcommands. */
static const char *edirs[] = {
_PATH_SBIN,
_PATH_USRSBIN,
NULL
};
const char *argv[100], **edir;
struct statfs sf;
pid_t pid;
int argc, i, status;
char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN];
if (realpath(name, mntpath) == NULL) {
warn("realpath %s", mntpath);
return (1);
}
name = mntpath;
if (mntopts == NULL)
mntopts = "";
if (options == NULL) {
if (*mntopts == '\0')
options = "rw";
else {
options = mntopts;
mntopts = "";
}
}
optbuf = catopt(strdup(mntopts), options);
if (strcmp(name, "/") == 0)
flags |= MNT_UPDATE;
if (flags & MNT_FORCE)
optbuf = catopt(optbuf, "force");
if (flags & MNT_RDONLY)
optbuf = catopt(optbuf, "ro");
/*
* XXX
* The mount_mfs (newfs) command uses -o to select the
* optimisation mode. We don't pass the default "-o rw"
* for that reason.
*/
if (flags & MNT_UPDATE)
optbuf = catopt(optbuf, "update");
argc = 0;
argv[argc++] = vfstype;
mangle(optbuf, &argc, argv);
argv[argc++] = spec;
argv[argc++] = name;
argv[argc] = NULL;
if (debug) {
(void)printf("exec: mount_%s", vfstype);
for (i = 1; i < argc; i++)
(void)printf(" %s", argv[i]);
(void)printf("\n");
return (0);
}
switch (pid = vfork()) {
case -1: /* Error. */
warn("vfork");
free(optbuf);
return (1);
case 0: /* Child. */
if (strcmp(vfstype, "ufs") == 0)
exit(mount_ufs(argc, (char * const *) argv));
/* Go find an executable. */
edir = edirs;
do {
(void)snprintf(execname,
sizeof(execname), "%s/mount_%s", *edir, vfstype);
execv(execname, (char * const *)argv);
if (errno != ENOENT)
warn("exec %s for %s", execname, name);
} while (*++edir != NULL);
if (errno == ENOENT)
warn("exec %s for %s", execname, name);
exit(1);
/* NOTREACHED */
default: /* Parent. */
free(optbuf);
if (waitpid(pid, &status, 0) < 0) {
warn("waitpid");
return (1);
}
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) != 0)
return (WEXITSTATUS(status));
} else if (WIFSIGNALED(status)) {
warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
return (1);
}
if (verbose) {
if (statfs(name, &sf) < 0) {
warn("statfs %s", name);
return (1);
}
prmount(&sf);
}
break;
}
return (0);
}
void
prmount(sf)
struct statfs *sf;
{
int flags;
struct opt *o;
int f;
(void)printf("%s on %s type %s", sf->f_mntfromname, sf->f_mntonname,
sf->f_fstypename);
flags = sf->f_flags & MNT_VISFLAGMASK;
for (f = 0, o = optnames; flags && o->o_opt; o++)
if (flags & o->o_opt) {
(void)printf("%s%s", !f++ ? " (" : ", ", o->o_name);
flags &= ~o->o_opt;
}
(void)printf(f ? ")\n" : "\n");
}
struct statfs *
getmntpt(name)
const char *name;
{
struct statfs *mntbuf;
int i, mntsize;
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
for (i = 0; i < mntsize; i++)
if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
strcmp(mntbuf[i].f_mntonname, name) == 0)
return (&mntbuf[i]);
return (NULL);
}
static enum { IN_LIST, NOT_IN_LIST } which;
int
selected(type)
const char *type;
{
char **av;
/* If no type specified, it's always selected. */
if (typelist == NULL)
return (1);
for (av = typelist; *av != NULL; ++av)
if (!strcmp(type, *av))
return (which == IN_LIST ? 1 : 0);
return (which == IN_LIST ? 0 : 1);
}
void
maketypelist(fslist)
char *fslist;
{
int i;
char *nextcp, **av;
if ((fslist == NULL) || (fslist[0] == '\0'))
errx(1, "empty type list");
/*
* XXX
* Note: the syntax is "noxxx,yyy" for no xxx's and
* no yyy's, not the more intuitive "noyyy,noyyy".
*/
if (fslist[0] == 'n' && fslist[1] == 'o') {
fslist += 2;
which = NOT_IN_LIST;
} else
which = IN_LIST;
/* Count the number of types. */
for (i = 1, nextcp = fslist; nextcp = strchr(nextcp, ','); i++)
++nextcp;
/* Build an array of that many types. */
if ((av = typelist = malloc((i + 1) * sizeof(char *))) == NULL)
err(1, NULL);
av[0] = fslist;
for (i = 1, nextcp = fslist; nextcp = strchr(nextcp, ','); i++) {
*nextcp = '\0';
av[i] = ++nextcp;
}
/* Terminate the array. */
av[i] = NULL;
}
char *
catopt(s0, s1)
char *s0;
const char *s1;
{
size_t i;
char *cp;
if (s0 && *s0) {
i = strlen(s0) + strlen(s1) + 1 + 1;
if ((cp = malloc(i)) == NULL)
err(1, NULL);
(void)snprintf(cp, i, "%s,%s", s0, s1);
} else
cp = strdup(s1);
if (s0)
free(s0);
return (cp);
}
void
mangle(options, argcp, argv)
char *options;
int *argcp;
const char **argv;
{
char *p, *s;
int argc;
argc = *argcp;
for (s = options; (p = strsep(&s, ",")) != NULL;)
if (*p != '\0')
if (*p == '-') {
argv[argc++] = p;
p = strchr(p, '=');
if (p) {
*p = '\0';
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);
}
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