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util-linux/sys-utils/mount.c

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/*
* mount(8) -- mount a filesystem
*
* Copyright (C) 2011 Red Hat, Inc. All rights reserved.
* Written by Karel Zak <kzak@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <getopt.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <stdarg.h>
#include <libmount.h>
#include <ctype.h>
#include "nls.h"
#include "c.h"
#include "env.h"
#include "strutils.h"
#include "closestream.h"
#include "canonicalize.h"
#define XALLOC_EXIT_CODE MNT_EX_SYSERR
#include "xalloc.h"
#define OPTUTILS_EXIT_CODE MNT_EX_USAGE
#include "optutils.h"
/*** TODO: DOCS:
*
* --options-mode={ignore,append,prepend,replace} MNT_OMODE_{IGNORE, ...}
* --options-source={fstab,mtab,disable} MNT_OMODE_{FSTAB,MTAB,NOTAB}
* --options-source-force MNT_OMODE_FORCE
*/
static int mk_exit_code(struct libmnt_context *cxt, int rc);
static void __attribute__((__noreturn__)) exit_non_root(const char *option)
{
const uid_t ruid = getuid();
const uid_t euid = geteuid();
if (ruid == 0 && euid != 0) {
/* user is root, but setuid to non-root */
if (option)
errx(MNT_EX_USAGE, _("only root can use \"--%s\" option "
"(effective UID is %u)"),
option, euid);
errx(MNT_EX_USAGE, _("only root can do that "
"(effective UID is %u)"), euid);
}
if (option)
errx(MNT_EX_USAGE, _("only root can use \"--%s\" option"), option);
errx(MNT_EX_USAGE, _("only root can do that"));
}
static void __attribute__((__noreturn__)) mount_print_version(void)
{
const char *ver = NULL;
const char **features = NULL, **p;
mnt_get_library_version(&ver);
mnt_get_library_features(&features);
printf(_("%s from %s (libmount %s"),
program_invocation_short_name,
PACKAGE_STRING,
ver);
p = features;
while (p && *p) {
fputs(p == features ? ": " : ", ", stdout);
fputs(*p++, stdout);
}
fputs(")\n", stdout);
exit(MNT_EX_SUCCESS);
}
static int table_parser_errcb(struct libmnt_table *tb __attribute__((__unused__)),
const char *filename, int line)
{
if (filename)
warnx(_("%s: parse error at line %d -- ignored"), filename, line);
return 1;
}
/*
* Replace control chars with '?' to be compatible with coreutils. For more
* robust solution use findmnt(1) where we use \x?? hex encoding.
*/
static void safe_fputs(const char *data)
{
const char *p;
for (p = data; p && *p; p++) {
if (iscntrl((unsigned char) *p))
fputc('?', stdout);
else
fputc(*p, stdout);
}
}
static void print_all(struct libmnt_context *cxt, char *pattern, int show_label)
{
struct libmnt_table *tb;
struct libmnt_iter *itr = NULL;
struct libmnt_fs *fs;
struct libmnt_cache *cache = NULL;
if (mnt_context_get_mtab(cxt, &tb))
err(MNT_EX_SYSERR, _("failed to read mtab"));
itr = mnt_new_iter(MNT_ITER_FORWARD);
if (!itr)
err(MNT_EX_SYSERR, _("failed to initialize libmount iterator"));
if (show_label)
cache = mnt_new_cache();
while (mnt_table_next_fs(tb, itr, &fs) == 0) {
const char *type = mnt_fs_get_fstype(fs);
const char *src = mnt_fs_get_source(fs);
const char *optstr = mnt_fs_get_options(fs);
char *xsrc = NULL;
if (type && pattern && !mnt_match_fstype(type, pattern))
continue;
if (!mnt_fs_is_pseudofs(fs) && !mnt_fs_is_netfs(fs))
xsrc = mnt_pretty_path(src, cache);
printf ("%s on ", xsrc ? xsrc : src);
safe_fputs(mnt_fs_get_target(fs));
if (type)
printf (" type %s", type);
if (optstr)
printf (" (%s)", optstr);
if (show_label && src) {
char *lb = mnt_cache_find_tag_value(cache, src, "LABEL");
if (lb)
printf (" [%s]", lb);
}
fputc('\n', stdout);
free(xsrc);
}
mnt_unref_cache(cache);
mnt_free_iter(itr);
}
/*
* mount -a [-F]
*/
static int mount_all(struct libmnt_context *cxt)
{
struct libmnt_iter *itr;
struct libmnt_fs *fs;
int mntrc, ignored, rc = MNT_EX_SUCCESS;
int nsucc = 0, nerrs = 0;
itr = mnt_new_iter(MNT_ITER_FORWARD);
if (!itr) {
warn(_("failed to initialize libmount iterator"));
return MNT_EX_SYSERR;
}
while (mnt_context_next_mount(cxt, itr, &fs, &mntrc, &ignored) == 0) {
const char *tgt = mnt_fs_get_target(fs);
if (ignored) {
if (mnt_context_is_verbose(cxt))
printf(ignored == 1 ? _("%-25s: ignored\n") :
_("%-25s: already mounted\n"),
tgt);
} else if (mnt_context_is_fork(cxt)) {
if (mnt_context_is_verbose(cxt))
printf("%-25s: mount successfully forked\n", tgt);
} else {
if (mk_exit_code(cxt, mntrc) == MNT_EX_SUCCESS) {
nsucc++;
/* Note that MNT_EX_SUCCESS return code does
* not mean that FS has been really mounted
* (e.g. nofail option) */
if (mnt_context_get_status(cxt)
&& mnt_context_is_verbose(cxt))
printf("%-25s: successfully mounted\n", tgt);
} else
nerrs++;
}
}
if (mnt_context_is_parent(cxt)) {
/* wait for mount --fork children */
int nchildren = 0;
nerrs = 0, nsucc = 0;
rc = mnt_context_wait_for_children(cxt, &nchildren, &nerrs);
if (!rc && nchildren)
nsucc = nchildren - nerrs;
}
if (nerrs == 0)
rc = MNT_EX_SUCCESS; /* all success */
else if (nsucc == 0)
rc = MNT_EX_FAIL; /* all failed */
else
rc = MNT_EX_SOMEOK; /* some success, some failed */
mnt_free_iter(itr);
return rc;
}
/*
* mount -a -o remount
*/
static int remount_all(struct libmnt_context *cxt)
{
struct libmnt_iter *itr;
struct libmnt_fs *fs;
int mntrc, ignored, rc = MNT_EX_SUCCESS;
int nsucc = 0, nerrs = 0;
itr = mnt_new_iter(MNT_ITER_FORWARD);
if (!itr) {
warn(_("failed to initialize libmount iterator"));
return MNT_EX_SYSERR;
}
while (mnt_context_next_remount(cxt, itr, &fs, &mntrc, &ignored) == 0) {
const char *tgt = mnt_fs_get_target(fs);
if (ignored) {
if (mnt_context_is_verbose(cxt))
printf(_("%-25s: ignored\n"), tgt);
} else {
if (mk_exit_code(cxt, mntrc) == MNT_EX_SUCCESS) {
nsucc++;
/* Note that MNT_EX_SUCCESS return code does
* not mean that FS has been really mounted
* (e.g. nofail option) */
if (mnt_context_get_status(cxt)
&& mnt_context_is_verbose(cxt))
printf("%-25s: successfully remounted\n", tgt);
} else
nerrs++;
}
}
if (nerrs == 0)
rc = MNT_EX_SUCCESS; /* all success */
else if (nsucc == 0)
rc = MNT_EX_FAIL; /* all failed */
else
rc = MNT_EX_SOMEOK; /* some success, some failed */
mnt_free_iter(itr);
return rc;
}
static void success_message(struct libmnt_context *cxt)
{
unsigned long mflags = 0;
const char *tgt, *src, *pr = program_invocation_short_name;
if (mnt_context_helper_executed(cxt)
|| mnt_context_get_status(cxt) != 1)
return;
mnt_context_get_mflags(cxt, &mflags);
tgt = mnt_context_get_target(cxt);
src = mnt_context_get_source(cxt);
if (mflags & MS_MOVE)
printf(_("%s: %s moved to %s.\n"), pr, src, tgt);
else if (mflags & MS_BIND)
printf(_("%s: %s bound on %s.\n"), pr, src, tgt);
else if (mflags & MS_PROPAGATION) {
if (src && strcmp(src, "none") != 0 && tgt)
printf(_("%s: %s mounted on %s.\n"), pr, src, tgt);
printf(_("%s: %s propagation flags changed.\n"), pr, tgt);
} else
printf(_("%s: %s mounted on %s.\n"), pr, src, tgt);
}
#if defined(HAVE_LIBSELINUX) && defined(HAVE_SECURITY_GET_INITIAL_CONTEXT)
#include <selinux/selinux.h>
#include <selinux/context.h>
static void selinux_warning(struct libmnt_context *cxt, const char *tgt)
{
if (tgt && mnt_context_is_verbose(cxt) && is_selinux_enabled() > 0) {
security_context_t raw = NULL, def = NULL;
if (getfilecon(tgt, &raw) > 0
&& security_get_initial_context("file", &def) == 0) {
if (!selinux_file_context_cmp(raw, def))
printf(_(
"mount: %s does not contain SELinux labels.\n"
" You just mounted an file system that supports labels which does not\n"
" contain labels, onto an SELinux box. It is likely that confined\n"
" applications will generate AVC messages and not be allowed access to\n"
" this file system. For more details see restorecon(8) and mount(8).\n"),
tgt);
}
freecon(raw);
freecon(def);
}
}
#else
# define selinux_warning(_x, _y)
#endif
/*
* Returns exit status (MNT_EX_*) and/or prints error message.
*/
static int mk_exit_code(struct libmnt_context *cxt, int rc)
{
const char *tgt;
char buf[BUFSIZ] = { 0 };
rc = mnt_context_get_excode(cxt, rc, buf, sizeof(buf));
tgt = mnt_context_get_target(cxt);
if (*buf) {
const char *spec = tgt;
if (!spec)
spec = mnt_context_get_source(cxt);
if (!spec)
spec = "???";
warnx("%s: %s.", spec, buf);
}
if (rc == MNT_EX_SUCCESS && mnt_context_get_status(cxt) == 1) {
selinux_warning(cxt, tgt);
}
return rc;
}
static struct libmnt_table *append_fstab(struct libmnt_context *cxt,
struct libmnt_table *fstab,
const char *path)
{
if (!fstab) {
fstab = mnt_new_table();
if (!fstab)
err(MNT_EX_SYSERR, _("failed to initialize libmount table"));
mnt_table_set_parser_errcb(fstab, table_parser_errcb);
mnt_context_set_fstab(cxt, fstab);
mnt_unref_table(fstab); /* reference is handled by @cxt now */
}
if (mnt_table_parse_fstab(fstab, path))
errx(MNT_EX_USAGE,_("%s: failed to parse"), path);
return fstab;
}
/*
* Check source and target paths -- non-root user should not be able to
* resolve paths which are unreadable for him.
*/
static void sanitize_paths(struct libmnt_context *cxt)
{
const char *p;
struct libmnt_fs *fs = mnt_context_get_fs(cxt);
if (!fs)
return;
p = mnt_fs_get_target(fs);
if (p) {
char *np = canonicalize_path_restricted(p);
if (!np)
err(MNT_EX_USAGE, "%s", p);
mnt_fs_set_target(fs, np);
free(np);
}
p = mnt_fs_get_srcpath(fs);
if (p) {
char *np = canonicalize_path_restricted(p);
if (!np)
err(MNT_EX_USAGE, "%s", p);
mnt_fs_set_source(fs, np);
free(np);
}
}
static void append_option(struct libmnt_context *cxt, const char *opt)
{
if (opt && (*opt == '=' || *opt == '\'' || *opt == '\"' || isblank(*opt)))
errx(MNT_EX_USAGE, _("unsupported option format: %s"), opt);
if (mnt_context_append_options(cxt, opt))
err(MNT_EX_SYSERR, _("failed to append option '%s'"), opt);
}
static int has_remount_flag(struct libmnt_context *cxt)
{
unsigned long mflags = 0;
if (mnt_context_get_mflags(cxt, &mflags))
return 0;
return mflags & MS_REMOUNT;
}
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fputs(USAGE_HEADER, out);
fprintf(out, _(
" %1$s [-lhV]\n"
" %1$s -a [options]\n"
" %1$s [options] [--source] <source> | [--target] <directory>\n"
" %1$s [options] <source> <directory>\n"
" %1$s <operation> <mountpoint> [<target>]\n"),
program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Mount a filesystem.\n"), out);
fputs(USAGE_OPTIONS, out);
fprintf(out, _(
" -a, --all mount all filesystems mentioned in fstab\n"
" -c, --no-canonicalize don't canonicalize paths\n"
" -f, --fake dry run; skip the mount(2) syscall\n"
" -F, --fork fork off for each device (use with -a)\n"
" -T, --fstab <path> alternative file to /etc/fstab\n"));
fprintf(out, _(
" -i, --internal-only don't call the mount.<type> helpers\n"));
fprintf(out, _(
" -l, --show-labels show also filesystem labels\n"));
fprintf(out, _(
" -n, --no-mtab don't write to /etc/mtab\n"));
fprintf(out, _(
" --options-mode <mode>\n"
" what to do with options loaded from fstab\n"
" --options-source <source>\n"
" mount options source\n"
" --options-source-force\n"
" force use of options from fstab/mtab\n"));
fprintf(out, _(
" -o, --options <list> comma-separated list of mount options\n"
" -O, --test-opts <list> limit the set of filesystems (use with -a)\n"
" -r, --read-only mount the filesystem read-only (same as -o ro)\n"
" -t, --types <list> limit the set of filesystem types\n"));
fprintf(out, _(
" --source <src> explicitly specifies source (path, label, uuid)\n"
" --target <target> explicitly specifies mountpoint\n"));
fprintf(out, _(
" -v, --verbose say what is being done\n"));
fprintf(out, _(
" -w, --rw, --read-write mount the filesystem read-write (default)\n"));
fprintf(out, _(
" -N, --namespace <ns> perform mount in another namespace\n"));
fputs(USAGE_SEPARATOR, out);
printf(USAGE_HELP_OPTIONS(25));
fprintf(out, _(
"\nSource:\n"
" -L, --label <label> synonym for LABEL=<label>\n"
" -U, --uuid <uuid> synonym for UUID=<uuid>\n"
" LABEL=<label> specifies device by filesystem label\n"
" UUID=<uuid> specifies device by filesystem UUID\n"
" PARTLABEL=<label> specifies device by partition label\n"
" PARTUUID=<uuid> specifies device by partition UUID\n"));
fprintf(out, _(
" <device> specifies device by path\n"
" <directory> mountpoint for bind mounts (see --bind/rbind)\n"
" <file> regular file for loopdev setup\n"));
fprintf(out, _(
"\nOperations:\n"
" -B, --bind mount a subtree somewhere else (same as -o bind)\n"
" -M, --move move a subtree to some other place\n"
" -R, --rbind mount a subtree and all submounts somewhere else\n"));
fprintf(out, _(
" --make-shared mark a subtree as shared\n"
" --make-slave mark a subtree as slave\n"
" --make-private mark a subtree as private\n"
" --make-unbindable mark a subtree as unbindable\n"));
fprintf(out, _(
" --make-rshared recursively mark a whole subtree as shared\n"
" --make-rslave recursively mark a whole subtree as slave\n"
" --make-rprivate recursively mark a whole subtree as private\n"
" --make-runbindable recursively mark a whole subtree as unbindable\n"));
printf(USAGE_MAN_TAIL("mount(8)"));
exit(MNT_EX_SUCCESS);
}
struct flag_str {
int value;
char *str;
};
static int omode2mask(const char *str)
{
size_t i;
static const struct flag_str flags[] = {
{ MNT_OMODE_IGNORE, "ignore" },
{ MNT_OMODE_APPEND, "append" },
{ MNT_OMODE_PREPEND, "prepend" },
{ MNT_OMODE_REPLACE, "replace" },
};
for (i = 0; i < ARRAY_SIZE(flags); i++) {
if (!strcmp(str, flags[i].str))
return flags[i].value;
}
return -EINVAL;
}
static long osrc2mask(const char *str, size_t len)
{
size_t i;
static const struct flag_str flags[] = {
{ MNT_OMODE_FSTAB, "fstab" },
{ MNT_OMODE_MTAB, "mtab" },
{ MNT_OMODE_NOTAB, "disable" },
};
for (i = 0; i < ARRAY_SIZE(flags); i++) {
if (!strncmp(str, flags[i].str, len) && !flags[i].str[len])
return flags[i].value;
}
return -EINVAL;
}
static pid_t parse_pid(const char *str)
{
char *end;
pid_t ret;
errno = 0;
ret = strtoul(str, &end, 10);
if (ret < 0 || errno || end == str || (end && *end))
return 0;
return ret;
}
int main(int argc, char **argv)
{
int c, rc = MNT_EX_SUCCESS, all = 0, show_labels = 0;
struct libmnt_context *cxt;
struct libmnt_table *fstab = NULL;
char *srcbuf = NULL;
char *types = NULL;
int oper = 0, is_move = 0;
int propa = 0;
int optmode = 0, optmode_mode = 0, optmode_src = 0;
enum {
MOUNT_OPT_SHARED = CHAR_MAX + 1,
MOUNT_OPT_SLAVE,
MOUNT_OPT_PRIVATE,
MOUNT_OPT_UNBINDABLE,
MOUNT_OPT_RSHARED,
MOUNT_OPT_RSLAVE,
MOUNT_OPT_RPRIVATE,
MOUNT_OPT_RUNBINDABLE,
MOUNT_OPT_TARGET,
MOUNT_OPT_SOURCE,
MOUNT_OPT_OPTMODE,
MOUNT_OPT_OPTSRC,
MOUNT_OPT_OPTSRC_FORCE
};
static const struct option longopts[] = {
{ "all", no_argument, NULL, 'a' },
{ "fake", no_argument, NULL, 'f' },
{ "fstab", required_argument, NULL, 'T' },
{ "fork", no_argument, NULL, 'F' },
{ "help", no_argument, NULL, 'h' },
{ "no-mtab", no_argument, NULL, 'n' },
{ "read-only", no_argument, NULL, 'r' },
{ "ro", no_argument, NULL, 'r' },
{ "verbose", no_argument, NULL, 'v' },
{ "version", no_argument, NULL, 'V' },
{ "read-write", no_argument, NULL, 'w' },
{ "rw", no_argument, NULL, 'w' },
{ "options", required_argument, NULL, 'o' },
{ "test-opts", required_argument, NULL, 'O' },
{ "types", required_argument, NULL, 't' },
{ "uuid", required_argument, NULL, 'U' },
{ "label", required_argument, NULL, 'L' },
{ "bind", no_argument, NULL, 'B' },
{ "move", no_argument, NULL, 'M' },
{ "rbind", no_argument, NULL, 'R' },
{ "make-shared", no_argument, NULL, MOUNT_OPT_SHARED },
{ "make-slave", no_argument, NULL, MOUNT_OPT_SLAVE },
{ "make-private", no_argument, NULL, MOUNT_OPT_PRIVATE },
{ "make-unbindable", no_argument, NULL, MOUNT_OPT_UNBINDABLE },
{ "make-rshared", no_argument, NULL, MOUNT_OPT_RSHARED },
{ "make-rslave", no_argument, NULL, MOUNT_OPT_RSLAVE },
{ "make-rprivate", no_argument, NULL, MOUNT_OPT_RPRIVATE },
{ "make-runbindable", no_argument, NULL, MOUNT_OPT_RUNBINDABLE },
{ "no-canonicalize", no_argument, NULL, 'c' },
{ "internal-only", no_argument, NULL, 'i' },
{ "show-labels", no_argument, NULL, 'l' },
{ "target", required_argument, NULL, MOUNT_OPT_TARGET },
{ "source", required_argument, NULL, MOUNT_OPT_SOURCE },
{ "options-mode", required_argument, NULL, MOUNT_OPT_OPTMODE },
{ "options-source", required_argument, NULL, MOUNT_OPT_OPTSRC },
{ "options-source-force", no_argument, NULL, MOUNT_OPT_OPTSRC_FORCE},
{ "namespace", required_argument, NULL, 'N' },
{ NULL, 0, NULL, 0 }
};
static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
{ 'B','M','R' }, /* bind,move,rbind */
{ 'L','U', MOUNT_OPT_SOURCE }, /* label,uuid,source */
{ 0 }
};
int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
sanitize_env();
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
close_stdout_atexit();
strutils_set_exitcode(MNT_EX_USAGE);
mnt_init_debug(0);
cxt = mnt_new_context();
if (!cxt)
err(MNT_EX_SYSERR, _("libmount context allocation failed"));
mnt_context_set_tables_errcb(cxt, table_parser_errcb);
while ((c = getopt_long(argc, argv, "aBcfFhilL:Mno:O:rRsU:vVwt:T:N:",
longopts, NULL)) != -1) {
/* only few options are allowed for non-root users */
if (mnt_context_is_restricted(cxt) &&
!strchr("hlLUVvrist", c) &&
c != MOUNT_OPT_TARGET &&
c != MOUNT_OPT_SOURCE)
exit_non_root(option_to_longopt(c, longopts));
err_exclusive_options(c, longopts, excl, excl_st);
switch(c) {
case 'a':
all = 1;
break;
case 'c':
mnt_context_disable_canonicalize(cxt, TRUE);
break;
case 'f':
mnt_context_enable_fake(cxt, TRUE);
break;
case 'F':
mnt_context_enable_fork(cxt, TRUE);
break;
case 'i':
mnt_context_disable_helpers(cxt, TRUE);
break;
case 'n':
mnt_context_disable_mtab(cxt, TRUE);
break;
case 'r':
append_option(cxt, "ro");
mnt_context_enable_rwonly_mount(cxt, FALSE);
break;
case 'v':
mnt_context_enable_verbose(cxt, TRUE);
break;
case 'w':
append_option(cxt, "rw");
mnt_context_enable_rwonly_mount(cxt, TRUE);
break;
case 'o':
append_option(cxt, optarg);
break;
case 'O':
if (mnt_context_set_options_pattern(cxt, optarg))
err(MNT_EX_SYSERR, _("failed to set options pattern"));
break;
case 'L':
xasprintf(&srcbuf, "LABEL=\"%s\"", optarg);
mnt_context_disable_swapmatch(cxt, 1);
mnt_context_set_source(cxt, srcbuf);
free(srcbuf);
break;
case 'U':
xasprintf(&srcbuf, "UUID=\"%s\"", optarg);
mnt_context_disable_swapmatch(cxt, 1);
mnt_context_set_source(cxt, srcbuf);
free(srcbuf);
break;
case 'l':
show_labels = 1;
break;
case 't':
types = optarg;
break;
case 'T':
fstab = append_fstab(cxt, fstab, optarg);
break;
case 's':
mnt_context_enable_sloppy(cxt, TRUE);
break;
case 'B':
oper = 1;
append_option(cxt, "bind");
break;
case 'M':
oper = 1;
is_move = 1;
break;
case 'R':
oper = 1;
append_option(cxt, "rbind");
break;
case 'N':
{
char path[PATH_MAX];
pid_t pid = parse_pid(optarg);
if (pid)
snprintf(path, sizeof(path), "/proc/%i/ns/mnt", pid);
if (mnt_context_set_target_ns(cxt, pid ? path : optarg))
err(MNT_EX_SYSERR, _("failed to set target namespace to %s"), pid ? path : optarg);
break;
}
case MOUNT_OPT_SHARED:
append_option(cxt, "shared");
propa = 1;
break;
case MOUNT_OPT_SLAVE:
append_option(cxt, "slave");
propa = 1;
break;
case MOUNT_OPT_PRIVATE:
append_option(cxt, "private");
propa = 1;
break;
case MOUNT_OPT_UNBINDABLE:
append_option(cxt, "unbindable");
propa = 1;
break;
case MOUNT_OPT_RSHARED:
append_option(cxt, "rshared");
propa = 1;
break;
case MOUNT_OPT_RSLAVE:
append_option(cxt, "rslave");
propa = 1;
break;
case MOUNT_OPT_RPRIVATE:
append_option(cxt, "rprivate");
propa = 1;
break;
case MOUNT_OPT_RUNBINDABLE:
append_option(cxt, "runbindable");
propa = 1;
break;
case MOUNT_OPT_TARGET:
mnt_context_disable_swapmatch(cxt, 1);
mnt_context_set_target(cxt, optarg);
break;
case MOUNT_OPT_SOURCE:
mnt_context_disable_swapmatch(cxt, 1);
mnt_context_set_source(cxt, optarg);
break;
case MOUNT_OPT_OPTMODE:
optmode_mode = omode2mask(optarg);
if (optmode_mode == -EINVAL) {
warnx(_("bad usage"));
errtryhelp(MNT_EX_USAGE);
}
break;
case MOUNT_OPT_OPTSRC:
{
unsigned long tmp = 0;
if (string_to_bitmask(optarg, &tmp, osrc2mask)) {
warnx(_("bad usage"));
errtryhelp(MNT_EX_USAGE);
}
optmode_src = tmp;
break;
}
case MOUNT_OPT_OPTSRC_FORCE:
optmode |= MNT_OMODE_FORCE;
break;
case 'h':
mnt_free_context(cxt);
usage();
case 'V':
mnt_free_context(cxt);
mount_print_version();
default:
errtryhelp(MNT_EX_USAGE);
}
}
argc -= optind;
argv += optind;
optmode |= optmode_mode | optmode_src;
if (optmode) {
if (!optmode_mode)
optmode |= MNT_OMODE_PREPEND;
if (!optmode_src)
optmode |= MNT_OMODE_FSTAB | MNT_OMODE_MTAB;
mnt_context_set_optsmode(cxt, optmode);
}
if (fstab && !mnt_context_is_nocanonicalize(cxt)) {
/*
* We have external (context independent) fstab instance, let's
* make a connection between the fstab and the canonicalization
* cache.
*/
mnt_table_set_cache(fstab, mnt_context_get_cache(cxt));
}
if (!mnt_context_get_source(cxt) &&
!mnt_context_get_target(cxt) &&
!argc &&
!all) {
if (oper || mnt_context_get_options(cxt)) {
warnx(_("bad usage"));
errtryhelp(MNT_EX_USAGE);
}
print_all(cxt, types, show_labels);
goto done;
}
/* Non-root users are allowed to use -t to print_all(),
but not to mount */
if (mnt_context_is_restricted(cxt) && types)
exit_non_root("types");
if (oper && (types || all || mnt_context_get_source(cxt))) {
warnx(_("bad usage"));
errtryhelp(MNT_EX_USAGE);
}
if (types && (all || strchr(types, ',') ||
strncmp(types, "no", 2) == 0))
mnt_context_set_fstype_pattern(cxt, types);
else if (types)
mnt_context_set_fstype(cxt, types);
if (all) {
/*
* A) Mount all
*/
if (has_remount_flag(cxt))
rc = remount_all(cxt);
else
rc = mount_all(cxt);
goto done;
} else if (argc == 0 && (mnt_context_get_source(cxt) ||
mnt_context_get_target(cxt))) {
/*
* B) mount -L|-U|--source|--target
*
* non-root may specify source *or* target, but not both
*/
if (mnt_context_is_restricted(cxt) &&
mnt_context_get_source(cxt) &&
mnt_context_get_target(cxt))
exit_non_root(NULL);
} else if (argc == 1 && (!mnt_context_get_source(cxt) ||
!mnt_context_get_target(cxt))) {
/*
* C) mount [-L|-U|--source] <target>
* mount [--target <dir>] <source>
* mount <source|target>
*
* non-root may specify source *or* target, but not both
*
* It does not matter for libmount if we set source or target
* here (the library is able to swap it), but it matters for
* sanitize_paths().
*/
int istag = mnt_tag_is_valid(argv[0]);
if (istag && mnt_context_get_source(cxt))
/* -L, -U or --source together with LABEL= or UUID= */
errx(MNT_EX_USAGE, _("source specified more than once"));
else if (istag || mnt_context_get_target(cxt))
mnt_context_set_source(cxt, argv[0]);
else
mnt_context_set_target(cxt, argv[0]);
if (mnt_context_is_restricted(cxt) &&
mnt_context_get_source(cxt) &&
mnt_context_get_target(cxt))
exit_non_root(NULL);
} else if (argc == 2 && !mnt_context_get_source(cxt)
&& !mnt_context_get_target(cxt)) {
/*
* D) mount <source> <target>
*/
if (mnt_context_is_restricted(cxt))
exit_non_root(NULL);
mnt_context_set_source(cxt, argv[0]);
mnt_context_set_target(cxt, argv[1]);
} else {
warnx(_("bad usage"));
errtryhelp(MNT_EX_USAGE);
}
if (mnt_context_is_restricted(cxt))
sanitize_paths(cxt);
if (is_move)
/* "move" as option string is not supported by libmount */
mnt_context_set_mflags(cxt, MS_MOVE);
if ((oper && !has_remount_flag(cxt)) || propa)
/* For --make-* or --bind is fstab/mtab unnecessary */
mnt_context_set_optsmode(cxt, MNT_OMODE_NOTAB);
rc = mnt_context_mount(cxt);
rc = mk_exit_code(cxt, rc);
if (rc == MNT_EX_SUCCESS && mnt_context_is_verbose(cxt))
success_message(cxt);
done:
mnt_free_context(cxt);
return rc;
}
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