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freebsd-dev/sbin/mount/mount.c
Pedro F. Giffuni 8967299b33 mount(1): Simplify by using asprintf(3) 
Instead of strlen() + malloc() + snprintf, just use asprintf().
No functional change.

Obtained from:	OpenBSD (CVS Rev. 1.67)
2016-09-19 18:42:58 +00:00

963 lines
23 KiB
C
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/*-
* 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.
* 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 const char copyright[] =
"@(#) Copyright (c) 1980, 1989, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#if 0
static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <paths.h>
#include <pwd.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libutil.h>
#include "extern.h"
#include "mntopts.h"
#include "pathnames.h"
/* `meta' options */
#define MOUNT_META_OPTION_FSTAB "fstab"
#define MOUNT_META_OPTION_CURRENT "current"
static int debug, fstab_style, verbose;
struct cpa {
char **a;
ssize_t sz;
int c;
};
char *catopt(char *, const char *);
struct statfs *getmntpt(const char *);
int hasopt(const char *, const char *);
int ismounted(struct fstab *, struct statfs *, int);
int isremountable(const char *);
void mangle(char *, struct cpa *);
char *update_options(char *, char *, int);
int mountfs(const char *, const char *, const char *,
int, const char *, const char *);
void remopt(char *, const char *);
void prmount(struct statfs *);
void putfsent(struct statfs *);
void usage(void);
char *flags2opts(int);
/* Map from mount options to printable formats. */
static struct opt {
uint64_t o_opt;
const char *o_name;
} optnames[] = {
{ MNT_ASYNC, "asynchronous" },
{ MNT_EXPORTED, "NFS exported" },
{ MNT_LOCAL, "local" },
{ MNT_NOATIME, "noatime" },
{ MNT_NOEXEC, "noexec" },
{ MNT_NOSUID, "nosuid" },
{ MNT_NOSYMFOLLOW, "nosymfollow" },
{ MNT_QUOTA, "with quotas" },
{ MNT_RDONLY, "read-only" },
{ MNT_SYNCHRONOUS, "synchronous" },
{ MNT_UNION, "union" },
{ MNT_NOCLUSTERR, "noclusterr" },
{ MNT_NOCLUSTERW, "noclusterw" },
{ MNT_SUIDDIR, "suiddir" },
{ MNT_SOFTDEP, "soft-updates" },
{ MNT_SUJ, "journaled soft-updates" },
{ MNT_MULTILABEL, "multilabel" },
{ MNT_ACLS, "acls" },
{ MNT_NFS4ACLS, "nfsv4acls" },
{ MNT_GJOURNAL, "gjournal" },
{ MNT_AUTOMOUNTED, "automounted" },
{ 0, NULL }
};
/*
* List of VFS types that can be remounted without becoming mounted on top
* of each other.
* XXX Is this list correct?
*/
static const char *
remountable_fs_names[] = {
"ufs", "ffs", "ext2fs",
0
};
static const char userquotaeq[] = "userquota=";
static const char groupquotaeq[] = "groupquota=";
static char *mountprog = NULL;
static int
use_mountprog(const char *vfstype)
{
/* XXX: We need to get away from implementing external mount
* programs for every filesystem, and move towards having
* each filesystem properly implement the nmount() system call.
*/
unsigned int i;
const char *fs[] = {
"cd9660", "mfs", "msdosfs", "nfs",
"nullfs", "smbfs", "udf", "unionfs",
NULL
};
if (mountprog != NULL)
return (1);
for (i = 0; fs[i] != NULL; ++i) {
if (strcmp(vfstype, fs[i]) == 0)
return (1);
}
return (0);
}
static int
exec_mountprog(const char *name, const char *execname, char *const argv[])
{
pid_t pid;
int status;
switch (pid = fork()) {
case -1: /* Error. */
warn("fork");
exit (1);
case 0: /* Child. */
/* Go find an executable. */
execvP(execname, _PATH_SYSPATH, argv);
if (errno == ENOENT) {
warn("exec %s not found", execname);
if (execname[0] != '/') {
warnx("in path: %s", _PATH_SYSPATH);
}
}
exit(1);
default: /* Parent. */
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);
}
break;
}
return (0);
}
static int
specified_ro(const char *arg)
{
char *optbuf, *opt;
int ret = 0;
optbuf = strdup(arg);
if (optbuf == NULL)
err(1, NULL);
for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
if (strcmp(opt, "ro") == 0) {
ret = 1;
break;
}
}
free(optbuf);
return (ret);
}
static void
restart_mountd(void)
{
struct pidfh *pfh;
pid_t mountdpid;
pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid);
if (pfh != NULL) {
/* Mountd is not running. */
pidfile_remove(pfh);
return;
}
if (errno != EEXIST) {
/* Cannot open pidfile for some reason. */
return;
}
/* We have mountd(8) PID in mountdpid varible, let's signal it. */
if (kill(mountdpid, SIGHUP) == -1)
err(1, "signal mountd");
}
int
main(int argc, char *argv[])
{
const char *mntfromname, **vfslist, *vfstype;
struct fstab *fs;
struct statfs *mntbuf;
int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro;
int onlylate;
char *cp, *ep, *options;
all = init_flags = late = onlylate = 0;
ro = 0;
options = NULL;
vfslist = NULL;
vfstype = "ufs";
while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1)
switch (ch) {
case 'a':
all = 1;
break;
case 'd':
debug = 1;
break;
case 'F':
setfstab(optarg);
break;
case 'f':
init_flags |= MNT_FORCE;
break;
case 'L':
onlylate = 1;
late = 1;
break;
case 'l':
late = 1;
break;
case 'n':
/* For compatibility with the Linux version of mount. */
break;
case 'o':
if (*optarg) {
options = catopt(options, optarg);
if (specified_ro(optarg))
ro = 1;
}
break;
case 'p':
fstab_style = 1;
verbose = 1;
break;
case 'r':
options = catopt(options, "ro");
ro = 1;
break;
case 't':
if (vfslist != NULL)
errx(1, "only one -t option may be specified");
vfslist = makevfslist(optarg);
vfstype = optarg;
break;
case 'u':
init_flags |= MNT_UPDATE;
break;
case 'v':
verbose = 1;
break;
case 'w':
options = catopt(options, "noro");
break;
case '?':
default:
usage();
/* NOTREACHED */
}
argc -= optind;
argv += optind;
#define BADTYPE(type) \
(strcmp(type, FSTAB_RO) && \
strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
if ((init_flags & MNT_UPDATE) && (ro == 0))
options = catopt(options, "noro");
rval = 0;
switch (argc) {
case 0:
if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
err(1, "getmntinfo");
if (all) {
while ((fs = getfsent()) != NULL) {
if (BADTYPE(fs->fs_type))
continue;
if (checkvfsname(fs->fs_vfstype, vfslist))
continue;
if (hasopt(fs->fs_mntops, "noauto"))
continue;
if (!hasopt(fs->fs_mntops, "late") && onlylate)
continue;
if (hasopt(fs->fs_mntops, "late") && !late)
continue;
if (hasopt(fs->fs_mntops, "failok"))
failok = 1;
else
failok = 0;
if (!(init_flags & MNT_UPDATE) &&
ismounted(fs, mntbuf, mntsize))
continue;
options = update_options(options, fs->fs_mntops,
mntbuf->f_flags);
if (mountfs(fs->fs_vfstype, fs->fs_spec,
fs->fs_file, init_flags, options,
fs->fs_mntops) && !failok)
rval = 1;
}
} else if (fstab_style) {
for (i = 0; i < mntsize; i++) {
if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
continue;
putfsent(&mntbuf[i]);
}
} else {
for (i = 0; i < mntsize; i++) {
if (checkvfsname(mntbuf[i].f_fstypename,
vfslist))
continue;
if (!verbose &&
(mntbuf[i].f_flags & MNT_IGNORE) != 0)
continue;
prmount(&mntbuf[i]);
}
}
exit(rval);
case 1:
if (vfslist != NULL)
usage();
rmslashes(*argv, *argv);
if (init_flags & MNT_UPDATE) {
mntfromname = NULL;
have_fstab = 0;
if ((mntbuf = getmntpt(*argv)) == NULL)
errx(1, "not currently mounted %s", *argv);
/*
* Only get the mntflags from fstab if both mntpoint
* and mntspec are identical. Also handle the special
* case where just '/' is mounted and 'spec' is not
* identical with the one from fstab ('/dev' is missing
* in the spec-string at boot-time).
*/
if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
if (strcmp(fs->fs_spec,
mntbuf->f_mntfromname) == 0 &&
strcmp(fs->fs_file,
mntbuf->f_mntonname) == 0) {
have_fstab = 1;
mntfromname = mntbuf->f_mntfromname;
} else if (argv[0][0] == '/' &&
argv[0][1] == '\0') {
fs = getfsfile("/");
have_fstab = 1;
mntfromname = fs->fs_spec;
}
}
if (have_fstab) {
options = update_options(options, fs->fs_mntops,
mntbuf->f_flags);
} else {
mntfromname = mntbuf->f_mntfromname;
options = update_options(options, NULL,
mntbuf->f_flags);
}
rval = mountfs(mntbuf->f_fstypename, mntfromname,
mntbuf->f_mntonname, init_flags, options, 0);
break;
}
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);
rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
init_flags, options, fs->fs_mntops);
break;
case 2:
/*
* If -t flag has not been specified, the path cannot be
* found, spec contains either a ':' or a '@', then assume
* that an NFS file system is being specified ala Sun.
* Check if the hostname contains only allowed characters
* to reduce false positives. IPv6 addresses containing
* ':' will be correctly parsed only if the separator is '@'.
* The definition of a valid hostname is taken from RFC 1034.
*/
if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL ||
(ep = strchr(argv[0], ':')) != NULL)) {
if (*ep == '@') {
cp = ep + 1;
ep = cp + strlen(cp);
} else
cp = argv[0];
while (cp != ep) {
if (!isdigit(*cp) && !isalpha(*cp) &&
*cp != '.' && *cp != '-' && *cp != ':')
break;
cp++;
}
if (cp == ep)
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.
*/
if (rval == 0 && getuid() == 0)
restart_mountd();
exit(rval);
}
int
ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
{
char realfsfile[PATH_MAX];
int i;
if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
/* the root file system can always be remounted */
return (0);
/* The user may have specified a symlink in fstab, resolve the path */
if (realpath(fs->fs_file, realfsfile) == NULL) {
/* Cannot resolve the path, use original one */
strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile));
}
/*
* Consider the filesystem to be mounted if:
* It has the same mountpoint as a mounted filesytem, and
* It has the same type as that same mounted filesystem, and
* It has the same device name as that same mounted filesystem, OR
* It is a nonremountable filesystem
*/
for (i = mntsize - 1; i >= 0; --i)
if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 &&
strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 &&
(!isremountable(fs->fs_vfstype) ||
(strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)))
return (1);
return (0);
}
int
isremountable(const char *vfsname)
{
const char **cp;
for (cp = remountable_fs_names; *cp; cp++)
if (strcmp(*cp, vfsname) == 0)
return (1);
return (0);
}
int
hasopt(const char *mntopts, const char *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);
}
static void
append_arg(struct cpa *sa, char *arg)
{
if (sa->c + 1 == sa->sz) {
sa->sz = sa->sz == 0 ? 8 : sa->sz * 2;
sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz);
if (sa->a == NULL)
errx(1, "realloc failed");
}
sa->a[++sa->c] = arg;
}
int
mountfs(const char *vfstype, const char *spec, const char *name, int flags,
const char *options, const char *mntopts)
{
struct statfs sf;
int i, ret;
char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX];
static struct cpa mnt_argv;
/* resolve the mountpoint with realpath(3) */
if (checkpath(name, mntpath) != 0) {
warn("%s", mntpath);
return (1);
}
name = mntpath;
if (mntopts == NULL)
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
* optimization mode. We don't pass the default "-o rw"
* for that reason.
*/
if (flags & MNT_UPDATE)
optbuf = catopt(optbuf, "update");
/* Compatibility glue. */
if (strcmp(vfstype, "msdos") == 0) {
warnx(
"Using \"-t msdosfs\", since \"-t msdos\" is deprecated.");
vfstype = "msdosfs";
}
/* Construct the name of the appropriate mount command */
(void)snprintf(execname, sizeof(execname), "mount_%s", vfstype);
mnt_argv.c = -1;
append_arg(&mnt_argv, execname);
mangle(optbuf, &mnt_argv);
if (mountprog != NULL)
strcpy(execname, mountprog);
append_arg(&mnt_argv, strdup(spec));
append_arg(&mnt_argv, strdup(name));
append_arg(&mnt_argv, NULL);
if (debug) {
if (use_mountprog(vfstype))
printf("exec: %s", execname);
else
printf("mount -t %s", vfstype);
for (i = 1; i < mnt_argv.c; i++)
(void)printf(" %s", mnt_argv.a[i]);
(void)printf("\n");
free(optbuf);
free(mountprog);
mountprog = NULL;
return (0);
}
if (use_mountprog(vfstype)) {
ret = exec_mountprog(name, execname, mnt_argv.a);
} else {
ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a);
}
free(optbuf);
free(mountprog);
mountprog = NULL;
if (verbose) {
if (statfs(name, &sf) < 0) {
warn("statfs %s", name);
return (1);
}
if (fstab_style)
putfsent(&sf);
else
prmount(&sf);
}
return (ret);
}
void
prmount(struct statfs *sfp)
{
uint64_t flags;
unsigned int i;
struct opt *o;
struct passwd *pw;
(void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
sfp->f_fstypename);
flags = sfp->f_flags & MNT_VISFLAGMASK;
for (o = optnames; flags != 0 && o->o_opt != 0; o++)
if (flags & o->o_opt) {
(void)printf(", %s", o->o_name);
flags &= ~o->o_opt;
}
/*
* Inform when file system is mounted by an unprivileged user
* or privileged non-root user.
*/
if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) {
(void)printf(", mounted by ");
if ((pw = getpwuid(sfp->f_owner)) != NULL)
(void)printf("%s", pw->pw_name);
else
(void)printf("%d", sfp->f_owner);
}
if (verbose) {
if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
(void)printf(", writes: sync %ju async %ju",
(uintmax_t)sfp->f_syncwrites,
(uintmax_t)sfp->f_asyncwrites);
if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
(void)printf(", reads: sync %ju async %ju",
(uintmax_t)sfp->f_syncreads,
(uintmax_t)sfp->f_asyncreads);
if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) {
printf(", fsid ");
for (i = 0; i < sizeof(sfp->f_fsid); i++)
printf("%02x", ((u_char *)&sfp->f_fsid)[i]);
}
}
(void)printf(")\n");
}
struct statfs *
getmntpt(const char *name)
{
struct statfs *mntbuf;
int i, mntsize;
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
for (i = mntsize - 1; i >= 0; i--) {
if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
strcmp(mntbuf[i].f_mntonname, name) == 0)
return (&mntbuf[i]);
}
return (NULL);
}
char *
catopt(char *s0, const char *s1)
{
char *cp;
if (s1 == NULL || *s1 == '\0')
return (s0);
if (s0 && *s0) {
if (asprintf(&cp, "%s,%s", s0, s1) == -1)
errx(1, "asprintf failed");
} else
cp = strdup(s1);
if (s0)
free(s0);
return (cp);
}
void
mangle(char *options, struct cpa *a)
{
char *p, *s, *val;
for (s = options; (p = strsep(&s, ",")) != NULL;)
if (*p != '\0') {
if (strcmp(p, "noauto") == 0) {
/*
* Do not pass noauto option to nmount().
* or external mount program. noauto is
* only used to prevent mounting a filesystem
* when 'mount -a' is specified, and is
* not a real mount option.
*/
continue;
} else if (strcmp(p, "late") == 0) {
/*
* "late" is used to prevent certain file
* systems from being mounted before late
* in the boot cycle; for instance,
* loopback NFS mounts can't be mounted
* before mountd starts.
*/
continue;
} else if (strcmp(p, "failok") == 0) {
/*
* "failok" is used to prevent certain file
* systems from being causing the system to
* drop into single user mode in the boot
* cycle, and is not a real mount option.
*/
continue;
} else if (strncmp(p, "mountprog", 9) == 0) {
/*
* "mountprog" is used to force the use of
* userland mount programs.
*/
val = strchr(p, '=');
if (val != NULL) {
++val;
if (*val != '\0')
mountprog = strdup(val);
}
if (mountprog == NULL) {
errx(1, "Need value for -o mountprog");
}
continue;
} else if (strcmp(p, "userquota") == 0) {
continue;
} else if (strncmp(p, userquotaeq,
sizeof(userquotaeq) - 1) == 0) {
continue;
} else if (strcmp(p, "groupquota") == 0) {
continue;
} else if (strncmp(p, groupquotaeq,
sizeof(groupquotaeq) - 1) == 0) {
continue;
} else if (*p == '-') {
append_arg(a, p);
p = strchr(p, '=');
if (p != NULL) {
*p = '\0';
append_arg(a, p + 1);
}
} else {
append_arg(a, strdup("-o"));
append_arg(a, p);
}
}
}
char *
update_options(char *opts, char *fstab, int curflags)
{
char *o, *p;
char *cur;
char *expopt, *newopt, *tmpopt;
if (opts == NULL)
return (strdup(""));
/* remove meta options from list */
remopt(fstab, MOUNT_META_OPTION_FSTAB);
remopt(fstab, MOUNT_META_OPTION_CURRENT);
cur = flags2opts(curflags);
/*
* Expand all meta-options passed to us first.
*/
expopt = NULL;
for (p = opts; (o = strsep(&p, ",")) != NULL;) {
if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
expopt = catopt(expopt, fstab);
else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
expopt = catopt(expopt, cur);
else
expopt = catopt(expopt, o);
}
free(cur);
free(opts);
/*
* Remove previous contradictory arguments. Given option "foo" we
* remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
* and "foo" - so we can deal with possible options like "notice".
*/
newopt = NULL;
for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
errx(1, "malloc failed");
strcpy(tmpopt, "no");
strcat(tmpopt, o);
remopt(newopt, tmpopt);
free(tmpopt);
if (strncmp("no", o, 2) == 0)
remopt(newopt, o+2);
newopt = catopt(newopt, o);
}
free(expopt);
return (newopt);
}
void
remopt(char *string, const char *opt)
{
char *o, *p, *r;
if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
return;
r = string;
for (p = string; (o = strsep(&p, ",")) != NULL;) {
if (strcmp(opt, o) != 0) {
if (*r == ',' && *o != '\0')
r++;
while ((*r++ = *o++) != '\0')
;
*--r = ',';
}
}
*r = '\0';
}
void
usage(void)
{
(void)fprintf(stderr, "%s\n%s\n%s\n",
"usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]",
" mount [-dfpruvw] special | node",
" mount [-dfpruvw] [-o options] [-t ufs | external_type] special node");
exit(1);
}
void
putfsent(struct statfs *ent)
{
struct fstab *fst;
char *opts, *rw;
int l;
opts = NULL;
/* flags2opts() doesn't return the "rw" option. */
if ((ent->f_flags & MNT_RDONLY) != 0)
rw = NULL;
else
rw = catopt(NULL, "rw");
opts = flags2opts(ent->f_flags);
opts = catopt(rw, opts);
if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 ||
strncmp(ent->f_mntfromname, "<above>", 7) == 0) {
strcpy(ent->f_mntfromname, (strnstr(ent->f_mntfromname, ":", 8)
+1));
}
l = strlen(ent->f_mntfromname);
printf("%s%s%s%s", ent->f_mntfromname,
l < 8 ? "\t" : "",
l < 16 ? "\t" : "",
l < 24 ? "\t" : " ");
l = strlen(ent->f_mntonname);
printf("%s%s%s%s", ent->f_mntonname,
l < 8 ? "\t" : "",
l < 16 ? "\t" : "",
l < 24 ? "\t" : " ");
printf("%s\t", ent->f_fstypename);
l = strlen(opts);
printf("%s%s", opts,
l < 8 ? "\t" : " ");
free(opts);
if ((fst = getfsspec(ent->f_mntfromname)))
printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
else if ((fst = getfsfile(ent->f_mntonname)))
printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
else if (strcmp(ent->f_fstypename, "ufs") == 0) {
if (strcmp(ent->f_mntonname, "/") == 0)
printf("\t1 1\n");
else
printf("\t2 2\n");
} else
printf("\t0 0\n");
}
char *
flags2opts(int flags)
{
char *res;
res = NULL;
if (flags & MNT_RDONLY) res = catopt(res, "ro");
if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync");
if (flags & MNT_NOEXEC) res = catopt(res, "noexec");
if (flags & MNT_NOSUID) res = catopt(res, "nosuid");
if (flags & MNT_UNION) res = catopt(res, "union");
if (flags & MNT_ASYNC) res = catopt(res, "async");
if (flags & MNT_NOATIME) res = catopt(res, "noatime");
if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr");
if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw");
if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow");
if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir");
if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel");
if (flags & MNT_ACLS) res = catopt(res, "acls");
if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls");
return (res);
}
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