ericonr
/
util-linux
mirror of https://github.com/ericonr/util-linux.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
util-linux/sys-utils/mount.c

888 lines
22 KiB
C
Raw Blame History

/*
* 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 "nls.h"
#include "c.h"
#include "env.h"
#include "optutils.h"
#include "strutils.h"
#include "xgetpass.h"
#include "exitcodes.h"
/*** TODO: DOCS:
*
* --guess-fstype is unsupported
*
* --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 passfd = -1;
static int readwrite;
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(MOUNT_EX_USAGE, _("only root can use \"--%s\" option "
"(effective UID is %u)"),
option, euid);
errx(MOUNT_EX_USAGE, _("only root can do that "
"(effective UID is %u)"), euid);
}
if (option)
errx(MOUNT_EX_USAGE, _("only root can use \"--%s\" option"), option);
errx(MOUNT_EX_USAGE, _("only root can do that"));
}
static void __attribute__((__noreturn__)) 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(MOUNT_EX_SUCCESS);
}
static int table_parser_errcb(struct libmnt_table *tb __attribute__((__unused__)),
const char *filename, int line)
{
if (filename)
warnx(_("%s: parse error: ignore entry at line %d."),
filename, line);
return 0;
}
static char *encrypt_pass_get(struct libmnt_context *cxt)
{
if (!cxt)
return 0;
#ifdef MCL_FUTURE
if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
warn(_("couldn't lock into memory"));
return NULL;
}
#endif
return xgetpass(passfd, _("Password: "));
}
static void encrypt_pass_release(struct libmnt_context *cxt
__attribute__((__unused__)), char *pwd)
{
char *p = pwd;
while (p && *p)
*p++ = '\0';
free(pwd);
munlockall();
}
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(MOUNT_EX_SYSERR, _("failed to read mtab"));
itr = mnt_new_iter(MNT_ITER_FORWARD);
if (!itr)
err(MOUNT_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))
xsrc = mnt_pretty_path(src, cache);
printf ("%s on %s", xsrc ? xsrc : src, 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_free_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 = MOUNT_EX_SUCCESS;
itr = mnt_new_iter(MNT_ITER_FORWARD);
if (!itr) {
warn(_("failed to initialize libmount iterator"));
return MOUNT_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 {
rc |= mk_exit_code(cxt, mntrc);
if (mnt_context_get_status(cxt)) {
rc |= MOUNT_EX_SOMEOK;
if (mnt_context_is_verbose(cxt))
printf("%-25s: successfully mounted\n", tgt);
}
}
}
if (mnt_context_is_parent(cxt)) {
/* wait for mount --fork children */
int nerrs = 0, nchildren = 0;
rc = mnt_context_wait_for_children(cxt, &nchildren, &nerrs);
if (!rc && nchildren)
rc = nchildren == nerrs ? MOUNT_EX_FAIL : MOUNT_EX_SOMEOK;
}
mnt_free_iter(itr);
return rc;
}
/*
* Handles generic errors like ENOMEM, ...
*
* rc = 0 success
* <0 error (usually -errno)
*
* Returns exit status (MOUNT_EX_*) and prints error message.
*/
static int handle_generic_errors(int rc, const char *msg, ...)
{
va_list va;
va_start(va, msg);
errno = -rc;
switch(errno) {
case EINVAL:
case EPERM:
vwarn(msg, va);
rc = MOUNT_EX_USAGE;
break;
case ENOMEM:
vwarn(msg, va);
rc = MOUNT_EX_SYSERR;
break;
default:
vwarn(msg, va);
rc = MOUNT_EX_FAIL;
break;
}
va_end(va);
return rc;
}
#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
/*
* rc = 0 success
* <0 error (usually -errno or -1)
*
* Returns exit status (MOUNT_EX_*) and/or prints error message.
*/
static int mk_exit_code(struct libmnt_context *cxt, int rc)
{
int syserr;
struct stat st;
unsigned long uflags = 0, mflags = 0;
int restricted = mnt_context_is_restricted(cxt);
const char *tgt = mnt_context_get_target(cxt);
const char *src = mnt_context_get_source(cxt);
try_readonly:
if (mnt_context_helper_executed(cxt))
/*
* /sbin/mount.<type> called, return status
*/
return mnt_context_get_helper_status(cxt);
if (rc == 0 && mnt_context_get_status(cxt) == 1) {
/*
* Libmount success && syscall success.
*/
selinux_warning(cxt, tgt);
return MOUNT_EX_SUCCESS; /* mount(2) success */
}
if (!mnt_context_syscall_called(cxt)) {
/*
* libmount errors (extra library checks)
*/
switch (rc) {
case -EPERM:
warnx(_("only root can mount %s on %s"), src, tgt);
return MOUNT_EX_USAGE;
case -EBUSY:
warnx(_("%s is already mounted"), src);
return MOUNT_EX_USAGE;
}
if (src == NULL || tgt == NULL) {
if (mflags & MS_REMOUNT)
warnx(_("%s not mounted"), src ? src : tgt);
else
warnx(_("can't find %s in %s"), src ? src : tgt,
mnt_get_fstab_path());
return MOUNT_EX_USAGE;
}
if (!mnt_context_get_fstype(cxt)) {
if (restricted)
warnx(_("I could not determine the filesystem type, "
"and none was specified"));
else
warnx(_("you must specify the filesystem type"));
return MOUNT_EX_USAGE;
}
return handle_generic_errors(rc, _("%s: mount failed"),
tgt ? tgt : src);
} else if (mnt_context_get_syscall_errno(cxt) == 0) {
/*
* mount(2) syscall success, but something else failed
* (probably error in mtab processing).
*/
if (rc < 0)
return handle_generic_errors(rc,
_("%s: filesystem mounted, but mount(8) failed"),
tgt ? tgt : src);
return MOUNT_EX_SOFTWARE; /* internal error */
}
/*
* mount(2) errors
*/
syserr = mnt_context_get_syscall_errno(cxt);
mnt_context_get_mflags(cxt, &mflags); /* mount(2) flags */
mnt_context_get_user_mflags(cxt, &uflags); /* userspace flags */
switch(syserr) {
case EPERM:
if (geteuid() == 0) {
if (stat(tgt, &st) || !S_ISDIR(st.st_mode))
warnx(_("mount point %s is not a directory"), tgt);
else
warnx(_("permission denied"));
} else
warnx(_("must be superuser to use mount"));
break;
case EBUSY:
{
struct libmnt_table *tb;
if (mflags & MS_REMOUNT) {
warnx(_("%s is busy"), tgt);
break;
}
warnx(_("%s is already mounted or %s busy"), src, tgt);
if (src && mnt_context_get_mtab(cxt, &tb) == 0) {
struct libmnt_iter *itr = mnt_new_iter(MNT_ITER_FORWARD);
struct libmnt_fs *fs;
while(mnt_table_next_fs(tb, itr, &fs) == 0) {
const char *s = mnt_fs_get_srcpath(fs),
*t = mnt_fs_get_target(fs);
if (t && s && streq_except_trailing_slash(s, src))
fprintf(stderr, _(
" %s is already mounted on %s\n"), s, t);
}
mnt_free_iter(itr);
}
break;
}
case ENOENT:
if (lstat(tgt, &st))
warnx(_("mount point %s does not exist"), tgt);
else if (stat(tgt, &st))
warnx(_("mount point %s is a symbolic link to nowhere"), tgt);
else if (stat(src, &st)) {
if (uflags & MNT_MS_NOFAIL)
return MOUNT_EX_SUCCESS;
warnx(_("special device %s does not exist"), src);
} else {
errno = syserr;
warn(_("mount(2) failed")); /* print errno */
}
break;
case ENOTDIR:
if (stat(tgt, &st) || ! S_ISDIR(st.st_mode))
warnx(_("mount point %s is not a directory"), tgt);
else if (stat(src, &st) && errno == ENOTDIR) {
if (uflags & MNT_MS_NOFAIL)
return MOUNT_EX_SUCCESS;
warnx(_("special device %s does not exist "
"(a path prefix is not a directory)"), src);
} else {
errno = syserr;
warn(_("mount(2) failed")); /* print errno */
}
break;
case EINVAL:
if (mflags & MS_REMOUNT)
warnx(_("%s not mounted or bad option"), tgt);
else
warnx(_("wrong fs type, bad option, bad superblock on %s,\n"
" missing codepage or helper program, or other error"),
src);
if (mnt_fs_is_netfs(mnt_context_get_fs(cxt)))
fprintf(stderr, _(
" (for several filesystems (e.g. nfs, cifs) you might\n"
" need a /sbin/mount.<type> helper program)\n"));
fprintf(stderr, _(
" In some cases useful info is found in syslog - try\n"
" dmesg | tail or so\n"));
break;
case EMFILE:
warnx(_("mount table full"));
break;
case EIO:
warnx(_("%s: can't read superblock"), src);
break;
case ENODEV:
warnx(_("unknown filesystem type '%s'"), mnt_context_get_fstype(cxt));
break;
case ENOTBLK:
if (uflags & MNT_MS_NOFAIL)
return MOUNT_EX_SUCCESS;
if (stat(src, &st))
warnx(_("%s is not a block device, and stat(2) fails?"), src);
else if (S_ISBLK(st.st_mode))
warnx(_("the kernel does not recognize %s as a block device\n"
" (maybe `modprobe driver'?)"), src);
else if (S_ISREG(st.st_mode))
warnx(_("%s is not a block device (maybe try `-o loop'?)"), src);
else
warnx(_(" %s is not a block device"), src);
break;
case ENXIO:
if (uflags & MNT_MS_NOFAIL)
return MOUNT_EX_SUCCESS;
warnx(_("%s is not a valid block device"), src);
break;
case EACCES:
case EROFS:
if (mflags & MS_RDONLY)
warnx(_("cannot mount %s read-only"), src);
else if (readwrite)
warnx(_("%s is write-protected but explicit `-w' flag given"), src);
else if (mflags & MS_REMOUNT)
warnx(_("cannot remount %s read-write, is write-protected"), src);
else {
warnx(_("%s is write-protected, mounting read-only"), src);
mnt_context_reset_status(cxt);
mnt_context_set_mflags(cxt, mflags | MS_RDONLY);
rc = mnt_context_do_mount(cxt);
if (!rc)
rc = mnt_context_finalize_mount(cxt);
goto try_readonly;
}
break;
case ENOMEDIUM:
warnx(_("no medium found on %s"), src);
break;
default:
warn(_("mount %s on %s failed"), src, tgt);
break;
}
return MOUNT_EX_FAIL;
}
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(MOUNT_EX_SYSERR, _("failed to initialize libmount table"));
mnt_table_set_parser_errcb(fstab, table_parser_errcb);
mnt_context_set_fstab(cxt, fstab);
}
if (mnt_table_parse_fstab(fstab, path))
errx(MOUNT_EX_USAGE,_("%s: failed to parse"), path);
return fstab;
}
static void __attribute__((__noreturn__)) usage(FILE *out)
{
fputs(USAGE_HEADER, out);
fprintf(out, _(
" %1$s [-lhV]\n"
" %1$s -a [options]\n"
" %1$s [options] <source> | <directory>\n"
" %1$s [options] <source> <directory>\n"
" %1$s <operation> <mountpoint> [<target>]\n"),
program_invocation_short_name);
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, _(
" -h, --help display this help text and exit\n"
" -i, --internal-only don't call the mount.<type> helpers\n"
" -l, --show-labels lists all mounts with LABELs\n"
" -n, --no-mtab don't write to /etc/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"
" -p, --pass-fd <num> read the passphrase from file descriptor\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, _(
" -v, --verbose say what is being done\n"
" -V, --version display version information and exit\n"
" -w, --read-write mount the filesystem read-write (default)\n"));
fputs(USAGE_SEPARATOR, out);
fputs(USAGE_HELP, out);
fputs(USAGE_VERSION, out);
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"));
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"));
fprintf(out, USAGE_MAN_TAIL("mount(8)"));
exit(out == stderr ? MOUNT_EX_USAGE : MOUNT_EX_SUCCESS);
}
int main(int argc, char **argv)
{
int c, rc = MOUNT_EX_SUCCESS, all = 0, show_labels = 0;
struct libmnt_context *cxt;
struct libmnt_table *fstab = NULL;
char *source = NULL, *srcbuf = NULL;
char *types = NULL;
unsigned long oper = 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
};
static const struct option longopts[] = {
{ "all", 0, 0, 'a' },
{ "fake", 0, 0, 'f' },
{ "fstab", 1, 0, 'T' },
{ "fork", 0, 0, 'F' },
{ "help", 0, 0, 'h' },
{ "no-mtab", 0, 0, 'n' },
{ "read-only", 0, 0, 'r' },
{ "ro", 0, 0, 'r' },
{ "verbose", 0, 0, 'v' },
{ "version", 0, 0, 'V' },
{ "read-write", 0, 0, 'w' },
{ "rw", 0, 0, 'w' },
{ "options", 1, 0, 'o' },
{ "test-opts", 1, 0, 'O' },
{ "pass-fd", 1, 0, 'p' },
{ "types", 1, 0, 't' },
{ "uuid", 1, 0, 'U' },
{ "label", 1, 0, 'L'},
{ "bind", 0, 0, 'B' },
{ "move", 0, 0, 'M' },
{ "rbind", 0, 0, 'R' },
{ "make-shared", 0, 0, MOUNT_OPT_SHARED },
{ "make-slave", 0, 0, MOUNT_OPT_SLAVE },
{ "make-private", 0, 0, MOUNT_OPT_PRIVATE },
{ "make-unbindable", 0, 0, MOUNT_OPT_UNBINDABLE },
{ "make-rshared", 0, 0, MOUNT_OPT_RSHARED },
{ "make-rslave", 0, 0, MOUNT_OPT_RSLAVE },
{ "make-rprivate", 0, 0, MOUNT_OPT_RPRIVATE },
{ "make-runbindable", 0, 0, MOUNT_OPT_RUNBINDABLE },
{ "no-canonicalize", 0, 0, 'c' },
{ "internal-only", 0, 0, 'i' },
{ "show-labels", 0, 0, 'l' },
{ NULL, 0, 0, 0 }
};
sanitize_env();
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
mnt_init_debug(0);
cxt = mnt_new_context();
if (!cxt)
err(MOUNT_EX_SYSERR, _("libmount context allocation failed"));
mnt_context_set_tables_errcb(cxt, table_parser_errcb);
while ((c = getopt_long(argc, argv, "aBcfFhilL:Mno:O:p:rRsU:vVwt:T:",
longopts, NULL)) != -1) {
/* only few options are allowed for non-root users */
if (mnt_context_is_restricted(cxt) && !strchr("hlLUVvpr", c))
exit_non_root(option_to_longopt(c, longopts));
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 'h':
usage(stdout);
break;
case 'i':
mnt_context_disable_helpers(cxt, TRUE);
break;
case 'n':
mnt_context_disable_mtab(cxt, TRUE);
break;
case 'r':
if (mnt_context_append_options(cxt, "ro"))
err(MOUNT_EX_SYSERR, _("failed to append options"));
readwrite = 0;
break;
case 'v':
mnt_context_enable_verbose(cxt, TRUE);
break;
case 'V':
print_version();
break;
case 'w':
if (mnt_context_append_options(cxt, "rw"))
err(MOUNT_EX_SYSERR, _("failed to append options"));
readwrite = 1;
break;
case 'o':
if (mnt_context_append_options(cxt, optarg))
err(MOUNT_EX_SYSERR, _("failed to append options"));
break;
case 'O':
if (mnt_context_set_options_pattern(cxt, optarg))
err(MOUNT_EX_SYSERR, _("failed to set options pattern"));
break;
case 'p':
passfd = strtol_or_err(optarg,
_("invalid passphrase file descriptor"));
break;
case 'L':
case 'U':
if (source)
errx(MOUNT_EX_USAGE, _("only one <source> may be specified"));
if (asprintf(&srcbuf, "%s=\"%s\"",
c == 'L' ? "LABEL" : "UUID", optarg) <= 0)
err(MOUNT_EX_SYSERR, _("failed to allocate source buffer"));
source = 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 = MS_BIND;
break;
case 'M':
oper = MS_MOVE;
break;
case 'R':
oper = (MS_BIND | MS_REC);
break;
case MOUNT_OPT_SHARED:
oper = MS_SHARED;
break;
case MOUNT_OPT_SLAVE:
oper = MS_SLAVE;
break;
case MOUNT_OPT_PRIVATE:
oper = MS_PRIVATE;
break;
case MOUNT_OPT_UNBINDABLE:
oper = MS_UNBINDABLE;
break;
case MOUNT_OPT_RSHARED:
oper = (MS_SHARED | MS_REC);
break;
case MOUNT_OPT_RSLAVE:
oper = (MS_SLAVE | MS_REC);
break;
case MOUNT_OPT_RPRIVATE:
oper = (MS_PRIVATE | MS_REC);
break;
case MOUNT_OPT_RUNBINDABLE:
oper = (MS_UNBINDABLE | MS_REC);
break;
default:
usage(stderr);
break;
}
}
argc -= optind;
argv += optind;
if (!source && !argc && !all) {
if (oper)
usage(stderr);
print_all(cxt, types, show_labels);
goto done;
}
if (oper && (types || all || source))
usage(stderr);
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);
mnt_context_set_passwd_cb(cxt, encrypt_pass_get, encrypt_pass_release);
if (all) {
/*
* A) Mount all
*/
rc = mount_all(cxt);
goto done;
} else if (argc == 0 && source) {
/*
* B) mount -L|-U
*/
mnt_context_set_source(cxt, source);
} else if (argc == 1) {
/*
* C) mount [-L|-U] <target>
* mount <source|target>
*/
if (source) {
if (mnt_context_is_restricted(cxt))
exit_non_root(NULL);
mnt_context_set_source(cxt, source);
}
mnt_context_set_target(cxt, argv[0]);
} else if (argc == 2 && !source) {
/*
* 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
usage(stderr);
if (oper) {
/* MS_PROPAGATION operations, let's set the mount flags */
mnt_context_set_mflags(cxt, oper);
/* For -make* or --bind is fstab unnecessary */
mnt_context_set_optsmode(cxt, MNT_OMODE_NOTAB);
}
rc = mnt_context_mount(cxt);
rc = mk_exit_code(cxt, rc);
done:
free(srcbuf);
mnt_free_context(cxt);
mnt_free_table(fstab);
return rc;
}
Reference in New Issue View Git Blame Copy Permalink