include text-utils/Makemodule.am
include term-utils/Makemodule.am
include login-utils/Makemodule.am
-include mount-deprecated/Makemodule.am
include sys-utils/Makemodule.am
include misc-utils/Makemodule.am
include disk-utils/Makemodule.am
AM_CONDITIONAL([BUILD_FDISK], [test "x$build_fdisk" = xyes])
-AC_ARG_ENABLE([deprecated-mount],
- AS_HELP_STRING([--enable-deprecated-mount], [build old mount utilities]),
- [], [enable_deprecated_mount=no]
-)
-UL_BUILD_INIT([deprecated_mount])
-UL_REQUIRES_LINUX([deprecated_mount])
-UL_REQUIRES_BUILD([deprecated_mount], [libblkid])
-AM_CONDITIONAL([BUILD_DEPRECATED_MOUNT], [test "x$build_deprecated_mount" = xyes])
-
-
AC_ARG_ENABLE([mount],
AS_HELP_STRING([--disable-mount], [do not build mount(8) and umount(8)]),
[], [enable_mount=check]
)
UL_BUILD_INIT([mount])
UL_REQUIRES_BUILD([mount], [libmount])
-UL_CONFLICTS_BUILD([mount], [deprecated_mount], [old deprecated mount version])
AM_CONDITIONAL([BUILD_MOUNT], [test "x$build_mount" = xyes])
+++ /dev/null
-if BUILD_DEPRECATED_MOUNT
-
-mount_common_sources = \
- mount-deprecated/sundries.c \
- mount-deprecated/sundries.h \
- mount-deprecated/fstab.h \
- mount-deprecated/mount_mntent.h \
- mount-deprecated/mount_constants.h \
- mount-deprecated/getusername.h \
- mount-deprecated/fsprobe.h \
- mount-deprecated/devname.c \
- mount-deprecated/devname.h \
- mount-deprecated/fstab.c \
- mount-deprecated/getusername.c \
- mount-deprecated/mount_mntent.c \
- mount-deprecated/fsprobe.c
-
-#
-# mount
-#
-bin_PROGRAMS += mount
-dist_man_MANS += mount-deprecated/mount.8
-mount_SOURCES = mount-deprecated/mount.c $(mount_common_sources)
-mount_CFLAGS = $(SUID_CFLAGS) $(AM_CFLAGS) -I$(ul_libblkid_incdir)
-mount_LDFLAGS = $(SUID_LDFLAGS) $(AM_LDFLAGS)
-mount_LDADD = $(LDADD) libblkid.la libcommon.la
-
-if HAVE_SELINUX
-mount_LDADD += $(SELINUX_LIBS)
-endif
-
-if HAVE_STATIC_MOUNT
-bin_PROGRAMS += mount.static
-mount_static_SOURCES = $(mount_SOURCES)
-mount_static_CFLAGS = $(mount_CFLAGS)
-mount_static_LDFLAGS = -all-static
-mount_static_LDADD = $(LDADD) libblkid.la libcommon.la
-if HAVE_SELINUX
-mount_static_LDADD += $(SELINUX_LIBS_STATIC)
-endif
-endif # HAVE_STATIC_MOUNT
-
-#
-# umount
-#
-bin_PROGRAMS += umount
-dist_man_MANS += mount-deprecated/umount.8
-umount_SOURCES = mount-deprecated/umount.c $(mount_common_sources)
-umount_CFLAGS = $(SUID_CFLAGS) $(AM_CFLAGS) -I$(ul_libblkid_incdir)
-umount_LDFLAGS = $(SUID_LDFLAGS) $(AM_LDFLAGS)
-umount_LDADD = $(LDADD) libblkid.la libcommon.la
-
-if HAVE_STATIC_UMOUNT
-bin_PROGRAMS += umount.static
-umount_static_SOURCES = $(umount_SOURCES)
-umount_static_CFLAGS = $(umount_CFLAGS)
-umount_static_LDFLAGS = -all-static
-umount_static_LDADD = $(LDADD) libblkid.la libcommon.la
-endif
-
-
-if MAKEINSTALL_DO_SETUID
-install-exec-hook-mount:
- chmod 4755 $(DESTDIR)$(bindir)/mount
- chmod 4755 $(DESTDIR)$(bindir)/umount
-
-INSTALL_EXEC_HOOKS += install-exec-hook-mount
-endif
-
-endif # BUILD_DEPRECATED_MOUNT
+++ /dev/null
-#include "fsprobe.h"
-
-#include "devname.h"
-#include "sundries.h" /* for xstrdup */
-
-const char *
-spec_to_devname(const char *spec)
-{
- if (!spec)
- return NULL;
- if (nocanonicalize || is_pseudo_fs(spec))
- return xstrdup(spec);
- return fsprobe_get_devname_by_spec(spec);
-}
+++ /dev/null
-#ifndef MOUNT_DEVNAME_H
-#define MOUNT_DEVNAME_H
-
-extern const char *spec_to_devname(const char *spec);
-
-#endif
+++ /dev/null
-#include <stdio.h>
-#include <string.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <unistd.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <stdlib.h>
-
-#include <blkid.h>
-
-#include "blkdev.h"
-#include "canonicalize.h"
-#include "pathnames.h"
-#include "fsprobe.h"
-
-/*
- * THIS IS DEPRECATED -- use blkid_evaluate_* API rather than this extra layer
- */
-
-
-static blkid_cache blcache;
-static blkid_probe blprobe;
-
-void
-fsprobe_init(void)
-{
- blcache = NULL;
- blprobe = NULL;
-}
-
-void
-fsprobe_exit(void)
-{
- if (blprobe)
- blkid_free_probe(blprobe);
- if (blcache)
- blkid_put_cache(blcache);
-}
-
-/*
- * Parses NAME=value, returns -1 on parse error, 0 success. The success is also
- * when the 'spec' doesn't contain name=value pair (because the spec could be
- * a devname too). In particular case the pointer 'name' is set to NULL.
- */
-int
-fsprobe_parse_spec(const char *spec, char **name, char **value)
-{
- *name = NULL;
- *value = NULL;
-
- if (strchr(spec, '='))
- return blkid_parse_tag_string(spec, name, value);
-
- return 0;
-}
-
-char *
-fsprobe_get_devname_by_spec(const char *spec)
-{
- return blkid_evaluate_spec(spec, &blcache);
-}
-
-int
-fsprobe_known_fstype(const char *fstype)
-{
- return blkid_known_fstype(fstype);
-}
-
-
-/* returns device LABEL, UUID, FSTYPE, ... by low-level
- * probing interface
- */
-static char *
-fsprobe_get_value(const char *name, const char *devname, int *ambi)
-{
- int fd, rc;
- const char *data = NULL;
-
- if (!devname || !name)
- return NULL;
- fd = open(devname, O_RDONLY);
- if (fd < 0)
- return NULL;
- if (!blprobe)
- blprobe = blkid_new_probe();
- if (!blprobe)
- goto done;
- if (blkid_probe_set_device(blprobe, fd, 0, 0))
- goto done;
-
- blkid_probe_enable_superblocks(blprobe, 1);
-
- blkid_probe_set_superblocks_flags(blprobe,
- BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID | BLKID_SUBLKS_TYPE);
-
- rc = blkid_do_safeprobe(blprobe);
- if (ambi)
- *ambi = rc == -2 ? 1 : 0; /* ambivalent probing result */
- if (!rc)
- blkid_probe_lookup_value(blprobe, name, &data, NULL);
-done:
- close(fd);
- return data ? strdup((char *) data) : NULL;
-}
-
-char *
-fsprobe_get_label_by_devname(const char *devname)
-{
- return fsprobe_get_value("LABEL", devname, NULL);
-}
-
-char *
-fsprobe_get_uuid_by_devname(const char *devname)
-{
- return fsprobe_get_value("UUID", devname, NULL);
-}
-
-char *
-fsprobe_get_fstype_by_devname(const char *devname)
-{
- return fsprobe_get_value("TYPE", devname, NULL);
-}
-
-char *
-fsprobe_get_fstype_by_devname_ambi(const char *devname, int *ambi)
-{
- return fsprobe_get_value("TYPE", devname, ambi);
-}
-
-char *
-fsprobe_get_devname_by_uuid(const char *uuid)
-{
- return blkid_evaluate_tag("UUID", uuid, &blcache);
-}
-
-char *
-fsprobe_get_devname_by_label(const char *label)
-{
- return blkid_evaluate_tag("LABEL", label, &blcache);
-}
+++ /dev/null
-#ifndef FSPROBE_H
-#define FSPROBE_H
-/*
- * THIS IS DEPRECATED -- use blkid_evaluate_* API rather than this extra layer
- *
- * This is the generic interface for filesystem guessing libraries.
- * Implementations are provided by
- */
-extern void fsprobe_init(void);
-extern void fsprobe_exit(void);
-
-extern int fsprobe_parse_spec(const char *spec, char **name, char **value);
-
-/* all routines return newly allocated string */
-extern char *fsprobe_get_devname_by_uuid(const char *uuid);
-extern char *fsprobe_get_devname_by_label(const char *label);
-extern char *fsprobe_get_devname_by_spec(const char *spec);
-
-extern char *fsprobe_get_label_by_devname(const char *devname);
-extern char *fsprobe_get_uuid_by_devname(const char *devname);
-extern char *fsprobe_get_fstype_by_devname(const char *devname);
-extern char *fsprobe_get_fstype_by_devname_ambi(const char *devname, int *ambi);
-
-
-extern int fsprobe_known_fstype(const char *fstype);
-
-#endif /* FSPROBE_H */
+++ /dev/null
-/* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
- * - added Native Language Support
- * Sun Mar 21 1999 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
- * - fixed strerr(errno) in gettext calls
- */
-
-#include <unistd.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <time.h>
-#include <mntent.h>
-
-#include "mount_mntent.h"
-#include "fstab.h"
-#include "sundries.h"
-#include "fsprobe.h"
-#include "pathnames.h"
-#include "nls.h"
-#include "strutils.h"
-#include "c.h"
-
-#define streq(s, t) (strcmp ((s), (t)) == 0)
-
-/* Information about mtab. ------------------------------------*/
-static int have_mtab_info = 0;
-static int var_mtab_does_not_exist = 0;
-static int var_mtab_is_a_symlink = 0;
-
-static void
-get_mtab_info(void) {
- if (!have_mtab_info) {
- struct stat mtab_stat;
-
- var_mtab_does_not_exist = 0;
- var_mtab_is_a_symlink = 0;
-
- if (lstat(_PATH_MOUNTED, &mtab_stat))
- var_mtab_does_not_exist = 1;
- else if (S_ISLNK(mtab_stat.st_mode))
- var_mtab_is_a_symlink = 1;
- have_mtab_info = 1;
- }
-}
-
-void
-reset_mtab_info(void) {
- have_mtab_info = 0;
-}
-
-int
-mtab_does_not_exist(void) {
- get_mtab_info();
- return var_mtab_does_not_exist;
-}
-
-int
-mtab_is_a_symlink(void) {
- get_mtab_info();
- return var_mtab_is_a_symlink;
-}
-
-int
-mtab_is_writable() {
- int fd;
-
- /* Should we write to /etc/mtab upon an update?
- Probably not if it is a symlink to /proc/mounts, since that
- would create a file /proc/mounts in case the proc filesystem
- is not mounted. */
- if (mtab_is_a_symlink())
- return 0;
-
- fd = open(_PATH_MOUNTED, O_RDWR | O_CREAT, 0644);
- if (fd >= 0) {
- close(fd);
- return 1;
- } else
- return 0;
-}
-
-/* Contents of mtab and fstab ---------------------------------*/
-
-struct mntentchn mounttable, fstab;
-static int got_mtab = 0;
-static int got_fstab = 0;
-
-static void read_mounttable(void), read_fstab(void);
-
-struct mntentchn *
-mtab_head() {
- if (!got_mtab)
- read_mounttable();
- return &mounttable;
-}
-
-struct mntentchn *
-fstab_head() {
- if (!got_fstab)
- read_fstab();
- return &fstab;
-}
-
-static void
-my_free_mc(struct mntentchn *mc) {
- if (mc) {
- my_free(mc->m.mnt_fsname);
- my_free(mc->m.mnt_dir);
- my_free(mc->m.mnt_type);
- my_free(mc->m.mnt_opts);
- free(mc);
- }
-}
-
-
-static void
-discard_mntentchn(struct mntentchn *mc0) {
- struct mntentchn *mc, *mc1;
-
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc1) {
- mc1 = mc->nxt;
- my_free_mc(mc);
- }
-}
-
-static void
-read_mntentchn(mntFILE *mfp, const char *fnam, struct mntentchn *mc0) {
- struct mntentchn *mc = mc0;
- struct my_mntent *mnt;
-
- while ((mnt = my_getmntent(mfp)) != NULL) {
- if (!streq(mnt->mnt_type, MNTTYPE_IGNORE)) {
- mc->nxt = (struct mntentchn *) xmalloc(sizeof(*mc));
- mc->nxt->prev = mc;
- mc = mc->nxt;
- mc->m = *mnt;
- mc->nxt = mc0;
- }
- }
- mc0->prev = mc;
- if (ferror(mfp->mntent_fp)) {
- int errsv = errno;
- error(_("warning: error reading %s: %s"),
- fnam, strerror (errsv));
- mc0->nxt = mc0->prev = NULL;
- }
- my_endmntent(mfp);
-}
-
-/*
- * Read /etc/mtab. If that fails, try /proc/mounts.
- * This produces a linked list. The list head mounttable is a dummy.
- */
-static void
-read_mounttable() {
- mntFILE *mfp;
- const char *fnam;
- struct mntentchn *mc = &mounttable;
-
- got_mtab = 1;
- mc->nxt = mc->prev = NULL;
-
- fnam = _PATH_MOUNTED;
- mfp = my_setmntent (fnam, "r");
- if (mfp == NULL || mfp->mntent_fp == NULL) {
- int errsv = errno;
- fnam = _PATH_PROC_MOUNTS;
- mfp = my_setmntent (fnam, "r");
- if (mfp == NULL || mfp->mntent_fp == NULL) {
- error(_("warning: can't open %s: %s"),
- _PATH_MOUNTED, strerror (errsv));
- return;
- }
- if (verbose)
- printf (_("mount: could not open %s - "
- "using %s instead\n"),
- _PATH_MOUNTED, _PATH_PROC_MOUNTS);
- }
- read_mntentchn(mfp, fnam, mc);
-}
-
-static void
-read_fstab() {
- mntFILE *mfp = NULL;
- const char *fnam;
- struct mntentchn *mc = &fstab;
-
- got_fstab = 1;
- mc->nxt = mc->prev = NULL;
-
- fnam = _PATH_MNTTAB;
- mfp = my_setmntent (fnam, "r");
- if (mfp == NULL || mfp->mntent_fp == NULL) {
- int errsv = errno;
- error(_("warning: can't open %s: %s"),
- _PATH_MNTTAB, strerror (errsv));
- return;
- }
- read_mntentchn(mfp, fnam, mc);
-}
-
-
-/* Given the name NAME, try to find it in mtab. */
-struct mntentchn *
-getmntfile (const char *name) {
- struct mntentchn *mc, *mc0;
-
- mc0 = mtab_head();
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt)
- if (streq(mc->m.mnt_dir, name) ||
- streq(mc->m.mnt_fsname, name))
- return mc;
- return NULL;
-}
-
-/*
- * Given the name NAME, and the place MCPREV we found it last time,
- * try to find it in mtab.
- */
-struct mntentchn *
-getmntfilebackward (const char *name, struct mntentchn *mcprev) {
- struct mntentchn *mc, *mc0;
-
- mc0 = mtab_head();
- if (!mcprev)
- mcprev = mc0;
-
- for (mc = mcprev->prev; mc && mc != mc0; mc = mc->prev)
- if (streq(mc->m.mnt_dir, name))
- return mc;
-
- for (mc = mcprev->prev; mc && mc != mc0; mc = mc->prev)
- if (streq(mc->m.mnt_fsname, name))
- return mc;
-
- return NULL;
-}
-
-/*
- * Given the directory name NAME, and the place MCPREV we found it last time,
- * try to find more occurrences.
- */
-struct mntentchn *
-getmntdirbackward (const char *name, struct mntentchn *mcprev) {
- struct mntentchn *mc, *mc0;
-
- mc0 = mtab_head();
- if (!mcprev)
- mcprev = mc0;
- for (mc = mcprev->prev; mc && mc != mc0; mc = mc->prev)
- if (streq(mc->m.mnt_dir, name))
- return mc;
- return NULL;
-}
-
-/*
- * Given the device name NAME, and the place MCPREV we found it last time,
- * try to find more occurrences.
- */
-struct mntentchn *
-getmntdevbackward (const char *name, struct mntentchn *mcprev) {
- struct mntentchn *mc, *mc0;
-
- mc0 = mtab_head();
- if (!mcprev)
- mcprev = mc0;
-
- /* canonical names in mtab */
- for (mc = mcprev->prev; mc && mc != mc0; mc = mc->prev) {
- if (streq(mc->m.mnt_fsname, name))
- return mc;
- }
-
- /* non-canonical names in mtab (this is BAD THING!) */
- for (mc = mcprev->prev; mc && mc != mc0; mc = mc->prev) {
- char *cn = canonicalize(mc->m.mnt_fsname);
- int res = cn ? streq(cn, name) : 0;
-
- free(cn);
- if (res)
- return mc;
- }
-
- return NULL;
-}
-
-/*
- * Given the name NAME, check that it occurs precisely once as dir or dev.
- */
-int
-is_mounted_once(const char *name) {
- struct mntentchn *mc, *mc0;
- int ct = 0;
-
- mc0 = mtab_head();
- for (mc = mc0->prev; mc && mc != mc0; mc = mc->prev)
- if (streq(mc->m.mnt_dir, name) ||
- streq(mc->m.mnt_fsname, name))
- ct++;
- return (ct == 1);
-}
-
-/* Given the name FILE, try to find the option "loop=FILE" in mtab. */
-struct mntentchn *
-getmntoptfile (const char *file) {
- struct mntentchn *mc, *mc0;
- const char *opts, *s;
- int l;
-
- if (!file)
- return NULL;
-
- l = strlen(file);
-
- mc0 = mtab_head();
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt)
- if ((opts = mc->m.mnt_opts) != NULL
- && (s = strstr(opts, "loop="))
- && !strncmp(s+5, file, l)
- && (s == opts || s[-1] == ',')
- && (s[l+5] == 0 || s[l+5] == ','))
- return mc;
- return NULL;
-}
-
-/* compares "quoted" or 'quoted' with unquoted */
-static int
-streq_quoted(const char *quoted, const char *unquoted)
-{
- if (*quoted == '"' || *quoted == '\'')
- return !strncmp(quoted + 1, unquoted, strlen(quoted) - 2);
-
- return streq(quoted, unquoted);
-}
-
-static int
-has_label(const char *device, const char *label) {
- const char *devlabel;
- int ret;
-
- devlabel = fsprobe_get_label_by_devname(device);
- if (!devlabel)
- return 0;
-
- ret = streq_quoted(label, devlabel);
- my_free(devlabel);
- return ret;
-}
-
-static int
-has_uuid(const char *device, const char *uuid){
- const char *devuuid;
- int ret;
-
- devuuid = fsprobe_get_uuid_by_devname(device);
- if (!devuuid)
- return 0;
-
- ret = streq_quoted(uuid, devuuid);
- my_free(devuuid);
- return ret;
-}
-
-/* Find the entry (DEV,DIR) in fstab -- spec and dir must be canonicalized! */
-struct mntentchn *
-getfs_by_devdir (const char *dev, const char *dir) {
- struct mntentchn *mc, *mc0;
-
- mc0 = fstab_head();
-
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt) {
- int ok = 1;
-
- /* dir */
- if (!streq(mc->m.mnt_dir, dir)) {
- char *dr = canonicalize(mc->m.mnt_dir);
- ok = streq(dr, dir);
- my_free(dr);
- }
-
- /* spec */
- if (ok && !streq(mc->m.mnt_fsname, dev)) {
- const char *fs = mc->m.mnt_fsname;
-
- if (strncmp (fs, "LABEL=", 6) == 0) {
- ok = has_label(dev, fs + 6);
- } else if (strncmp (fs, "UUID=", 5) == 0) {
- ok = has_uuid(dev, fs + 5);
- } else {
- fs = canonicalize_spec(mc->m.mnt_fsname);
- ok = streq_except_trailing_slash(fs, dev);
- my_free(fs);
- }
- }
- if (ok)
- return mc;
- }
-
- return NULL;
-}
-
-/* Find the dir DIR in fstab. */
-struct mntentchn *
-getfs_by_dir (const char *dir) {
- struct mntentchn *mc, *mc0;
- char *cdir;
-
- mc0 = fstab_head();
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt)
- if (streq(mc->m.mnt_dir, dir))
- return mc;
-
- cdir = canonicalize(dir);
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt) {
- int ok = streq(mc->m.mnt_dir, cdir);
- if (!ok) {
- char *dr = canonicalize(mc->m.mnt_dir);
- ok = dr ? streq(dr, cdir) : 0;
- free(dr);
- }
- if (ok) {
- free(cdir);
- return mc;
- }
- }
- free(cdir);
- return NULL;
-}
-
-/* Find the device SPEC in fstab. */
-struct mntentchn *
-getfs_by_spec (const char *spec) {
- char *name = NULL, *value = NULL, *cspec;
- struct mntentchn *mc = NULL;
-
- if (!spec)
- return NULL;
-
- if (fsprobe_parse_spec(spec, &name, &value) != 0)
- return NULL; /* parse error */
-
- if (name) {
- if (!strcmp(name,"LABEL"))
- mc = getfs_by_label (value);
- else if (!strcmp(name,"UUID"))
- mc = getfs_by_uuid (value);
-
- free(name);
- free(value);
- return mc;
- }
-
- cspec = canonicalize_spec(spec);
- mc = getfs_by_devname(cspec);
- free(cspec);
-
- if (!mc)
- /* noncanonical name like /dev/cdrom */
- mc = getfs_by_devname(spec);
-
- return mc;
-}
-
-/* Find the device in fstab. */
-struct mntentchn *
-getfs_by_devname (const char *devname) {
- struct mntentchn *mc, *mc0;
-
- mc0 = fstab_head();
-
- /* canonical devname in fstab */
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt)
- if (streq(mc->m.mnt_fsname, devname))
- return mc;
-
- /* noncanonical devname in fstab */
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt) {
- char *fs;
-
- if (strncmp(mc->m.mnt_fsname, "LABEL=", 6) == 0 ||
- strncmp(mc->m.mnt_fsname, "UUID=", 5) == 0)
- continue;
-
- fs = canonicalize_spec(mc->m.mnt_fsname);
- if (streq(fs, devname)) {
- free(fs);
- return mc;
- }
- free(fs);
- }
-
- return NULL;
-}
-
-
-/* Find the uuid UUID in fstab. */
-struct mntentchn *
-getfs_by_uuid (const char *uuid) {
- struct mntentchn *mc, *mc0;
-
- mc0 = fstab_head();
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt)
- if (strncmp (mc->m.mnt_fsname, "UUID=", 5) == 0
- && streq_quoted(mc->m.mnt_fsname + 5, uuid))
- return mc;
- return NULL;
-}
-
-/* Find the label LABEL in fstab. */
-struct mntentchn *
-getfs_by_label (const char *label) {
- struct mntentchn *mc, *mc0;
-
- mc0 = fstab_head();
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt)
- if (strncmp (mc->m.mnt_fsname, "LABEL=", 6) == 0
- && streq_quoted(mc->m.mnt_fsname + 6, label))
- return mc;
- return NULL;
-}
-
-/* Updating mtab ----------------------------------------------*/
-
-/* Flag for already existing lock file. */
-static int we_created_lockfile = 0;
-static int lockfile_fd = -1;
-
-/* Flag to indicate that signals have been set up. */
-static int signals_have_been_setup = 0;
-
-/* Ensure that the lock is released if we are interrupted. */
-#ifndef HAVE_STRSIGNAL_DECL
-extern char *strsignal(int sig); /* not always in <string.h> */
-#endif
-
-static void
-handler (int sig) {
- die(EX_USER, "%s", strsignal(sig));
-}
-
-static void
-setlkw_timeout (int sig __attribute__ ((__unused__))) {
- /* nothing, fcntl will fail anyway */
-}
-
-/* Remove lock file. */
-void
-unlock_mtab (void) {
- if (we_created_lockfile) {
- close(lockfile_fd);
- lockfile_fd = -1;
- unlink (_PATH_MOUNTED_LOCK);
- we_created_lockfile = 0;
- }
-}
-
-/* Create the lock file.
- The lock file will be removed if we catch a signal or when we exit. */
-/* The old code here used flock on a lock file /etc/mtab~ and deleted
- this lock file afterwards. However, as rgooch remarks, that has a
- race: a second mount may be waiting on the lock and proceed as
- soon as the lock file is deleted by the first mount, and immediately
- afterwards a third mount comes, creates a new /etc/mtab~, applies
- flock to that, and also proceeds, so that the second and third mount
- now both are scribbling in /etc/mtab.
- The new code uses a link() instead of a creat(), where we proceed
- only if it was us that created the lock, and hence we always have
- to delete the lock afterwards. Now the use of flock() is in principle
- superfluous, but avoids an arbitrary sleep(). */
-
-/* Where does the link point to? Obvious choices are mtab and mtab~~.
- HJLu points out that the latter leads to races. Right now we use
- mtab~.<pid> instead. Use 20 as upper bound for the length of %d. */
-#define MOUNTLOCK_LINKTARGET _PATH_MOUNTED_LOCK "%d"
-#define MOUNTLOCK_LINKTARGET_LTH (sizeof(_PATH_MOUNTED_LOCK)+20)
-
-/*
- * The original mount locking code has used sleep(1) between attempts and
- * maximal number of attemps has been 5.
- *
- * There was very small number of attempts and extremely long waiting (1s)
- * that is useless on machines with large number of concurret mount processes.
- *
- * Now we wait few thousand microseconds between attempts and we have global
- * time limit (30s) rather than limit for number of attempts. The advantage
- * is that this method also counts time which we spend in fcntl(F_SETLKW) and
- * number of attempts is not so much restricted.
- *
- * -- kzak@redhat.com [2007-Mar-2007]
- */
-
-/* maximum seconds between first and last attempt */
-#define MOUNTLOCK_MAXTIME 30
-
-/* sleep time (in microseconds, max=999999) between attempts */
-#define MOUNTLOCK_WAITTIME 5000
-
-void
-lock_mtab (void) {
- int i;
- struct timespec waittime;
- struct timeval maxtime;
- char linktargetfile[MOUNTLOCK_LINKTARGET_LTH];
-
- if (!signals_have_been_setup) {
- int sig = 0;
- struct sigaction sa;
-
- sa.sa_handler = handler;
- sa.sa_flags = 0;
- sigfillset (&sa.sa_mask);
-
- while (sigismember (&sa.sa_mask, ++sig) != -1
- && sig != SIGCHLD) {
- if (sig == SIGALRM)
- sa.sa_handler = setlkw_timeout;
- else
- sa.sa_handler = handler;
- sigaction (sig, &sa, (struct sigaction *) 0);
- }
- signals_have_been_setup = 1;
- }
-
- sprintf(linktargetfile, MOUNTLOCK_LINKTARGET, getpid ());
-
- i = open (linktargetfile, O_WRONLY|O_CREAT, S_IRUSR|S_IWUSR);
- if (i < 0) {
- int errsv = errno;
- /* linktargetfile does not exist (as a file)
- and we cannot create it. Read-only filesystem?
- Too many files open in the system?
- Filesystem full? */
- die (EX_FILEIO, _("can't create lock file %s: %s "
- "(use -n flag to override)"),
- linktargetfile, strerror (errsv));
- }
- close(i);
-
- gettimeofday(&maxtime, NULL);
- maxtime.tv_sec += MOUNTLOCK_MAXTIME;
-
- waittime.tv_sec = 0;
- waittime.tv_nsec = (1000 * MOUNTLOCK_WAITTIME);
-
- /* Repeat until it was us who made the link */
- while (!we_created_lockfile) {
- struct timeval now;
- struct flock flock;
- int errsv, j;
-
- j = link(linktargetfile, _PATH_MOUNTED_LOCK);
- errsv = errno;
-
- if (j == 0)
- we_created_lockfile = 1;
-
- if (j < 0 && errsv != EEXIST) {
- (void) unlink(linktargetfile);
- die (EX_FILEIO, _("can't link lock file %s: %s "
- "(use -n flag to override)"),
- _PATH_MOUNTED_LOCK, strerror (errsv));
- }
-
- lockfile_fd = open (_PATH_MOUNTED_LOCK, O_WRONLY);
-
- if (lockfile_fd < 0) {
- /* Strange... Maybe the file was just deleted? */
- int errsv = errno;
- gettimeofday(&now, NULL);
- if (errno == ENOENT && now.tv_sec < maxtime.tv_sec) {
- we_created_lockfile = 0;
- continue;
- }
- (void) unlink(linktargetfile);
- die (EX_FILEIO, _("can't open lock file %s: %s "
- "(use -n flag to override)"),
- _PATH_MOUNTED_LOCK, strerror (errsv));
- }
-
- flock.l_type = F_WRLCK;
- flock.l_whence = SEEK_SET;
- flock.l_start = 0;
- flock.l_len = 0;
-
- if (j == 0) {
- /* We made the link. Now claim the lock. */
- if (fcntl (lockfile_fd, F_SETLK, &flock) == -1) {
- if (verbose) {
- int errsv = errno;
- printf(_("Can't lock lock file %s: %s\n"),
- _PATH_MOUNTED_LOCK, strerror (errsv));
- }
- /* proceed, since it was us who created the lockfile anyway */
- }
- (void) unlink(linktargetfile);
- } else {
- /* Someone else made the link. Wait. */
- gettimeofday(&now, NULL);
- if (now.tv_sec < maxtime.tv_sec) {
- alarm(maxtime.tv_sec - now.tv_sec);
- if (fcntl (lockfile_fd, F_SETLKW, &flock) == -1) {
- int errsv = errno;
- (void) unlink(linktargetfile);
- die (EX_FILEIO, _("can't lock lock file %s: %s"),
- _PATH_MOUNTED_LOCK, (errno == EINTR) ?
- _("timed out") : strerror (errsv));
- }
- alarm(0);
-
- nanosleep(&waittime, NULL);
- } else {
- (void) unlink(linktargetfile);
- die (EX_FILEIO, _("Cannot create link %s\n"
- "Perhaps there is a stale lock file?\n"),
- _PATH_MOUNTED_LOCK);
- }
- close(lockfile_fd);
- }
- }
-}
-
-/* returns whole option with name @optname from @src list */
-char *
-get_option(const char *optname, const char *src, size_t *len)
-{
- char *opt, *end;
- size_t sz;
-
- if (!src)
- return NULL;
-
- opt = strstr(src, optname);
- if (!opt)
- return NULL;
-
- end = strchr(opt, ',');
- sz = end && end > opt ? (size_t) (end - opt) : strlen(opt);
-
- if (len)
- *len = sz;
-
- if ((opt == src || *(opt - 1) == ',') &&
- (*(opt + sz) == '\0' || *(opt + sz) == ','))
- return opt;
-
- return NULL;
-}
-
- /* If @list contains "user=peter" and @s is "user=", return "peter" */
-char *
-get_option_value(const char *list, const char *s)
-{
- const char *t;
- size_t n = strlen(s);
-
- while (list && *list) {
- if (strncmp(list, s, n) == 0) {
- s = t = list + n;
- while (*s && *s != ',')
- s++;
- return xstrndup(t, s-t);
- }
- while (*list && *list++ != ',') ;
- }
- return NULL;
-}
-
-static int
-cpy_option(const char *optname, char *dest, const char *src)
-{
- char *opt;
- size_t sz;
-
- opt = get_option(optname, src, &sz);
- if (!opt)
- /* the option doesn't exist */
- return 0;
-
- if (get_option(optname, dest, NULL))
- /* the options is already in dest */
- return 0;
-
- if (*dest) {
- dest = dest + strlen(dest);
- *dest++ = ','; /* separator */
- }
- memcpy(dest, opt, sz); /* copy option */
- *(dest + sz) = '\0'; /* terminator */
-
- return 1;
-}
-
-/* Generates (and allocates) new options for remount
- *
- * We cannot blindly replace the old options, otherwise we will lost some
- * internally generated stuff (e.g loop=).
- */
-static char *
-mk_remount_opts(const char *old, const char *instead)
-{
- char *new;
- size_t sz;
-
- if (old == NULL && instead == NULL)
- return NULL;
- if (!old)
- return xstrdup(instead);
-
- /* max size of new options is:
- * old + new + '\0' + separator (for each copied option)
- */
- sz = strlen(old) + (instead ? strlen(instead) : 0) + 2;
- new = xmalloc(sz);
- if (instead && *instead)
- strncpy(new, instead, sz);
- else
- *new = '\0';
-
- cpy_option("loop=", new, old);
-
- return new;
-}
-
-/*
- * Update the mtab.
- * Used by umount with null INSTEAD: remove the last DIR entry.
- * Used by mount upon a remount: update option part,
- * and complain if a wrong device or type was given.
- * [Note that often a remount will be a rw remount of /
- * where there was no entry before, and we'll have to believe
- * the values given in INSTEAD.]
- */
-
-void
-update_mtab (const char *dir, struct my_mntent *instead) {
- mntFILE *mfp, *mftmp;
- const char *fnam = _PATH_MOUNTED;
- struct mntentchn mtabhead; /* dummy */
- struct mntentchn *mc, *mc0 = NULL, *absent = NULL;
- struct stat sbuf;
- int fd;
-
- if (mtab_does_not_exist() || !mtab_is_writable())
- return;
-
- lock_mtab();
-
- /* having locked mtab, read it again */
- mc0 = mc = &mtabhead;
- mc->nxt = mc->prev = NULL;
-
- mfp = my_setmntent(fnam, "r");
- if (mfp == NULL || mfp->mntent_fp == NULL) {
- int errsv = errno;
- error (_("cannot open %s (%s) - mtab not updated"),
- fnam, strerror (errsv));
- goto leave;
- }
-
- read_mntentchn(mfp, fnam, mc);
-
- /* find last occurrence of dir */
- if (dir) {
- for (mc = mc0->prev; mc && mc != mc0; mc = mc->prev)
- if (streq(mc->m.mnt_dir, dir))
- break;
- }
- if (dir && mc && mc != mc0) {
- if (instead == NULL) {
- /* An umount - remove entry */
- if (mc && mc != mc0) {
- mc->prev->nxt = mc->nxt;
- mc->nxt->prev = mc->prev;
- my_free_mc(mc);
- }
- } else if (!strcmp(mc->m.mnt_dir, instead->mnt_dir)) {
- /* A remount */
- char *opts = mk_remount_opts(mc->m.mnt_opts,
- instead->mnt_opts);
- my_free(mc->m.mnt_opts);
- mc->m.mnt_opts = opts;
- } else {
- /* A move */
- my_free(mc->m.mnt_dir);
- mc->m.mnt_dir = xstrdup(instead->mnt_dir);
- }
- } else if (instead) {
- /* not found, add a new entry */
- absent = xmalloc(sizeof(*absent));
- absent->m.mnt_fsname = xstrdup(instead->mnt_fsname);
- absent->m.mnt_dir = xstrdup(instead->mnt_dir);
- absent->m.mnt_type = xstrdup(instead->mnt_type);
- absent->m.mnt_opts = xstrdup(instead->mnt_opts);
- absent->m.mnt_freq = instead->mnt_freq;
- absent->m.mnt_passno = instead->mnt_passno;
- absent->nxt = mc0;
- if (mc0->prev != NULL) {
- absent->prev = mc0->prev;
- mc0->prev->nxt = absent;
- } else {
- absent->prev = mc0;
- }
- mc0->prev = absent;
- if (mc0->nxt == NULL)
- mc0->nxt = absent;
- }
-
- /* write chain to mtemp */
- mftmp = my_setmntent (_PATH_MOUNTED_TMP, "w");
- if (mftmp == NULL || mftmp->mntent_fp == NULL) {
- int errsv = errno;
- error (_("cannot open %s (%s) - mtab not updated"),
- _PATH_MOUNTED_TMP, strerror (errsv));
- goto leave;
- }
-
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt) {
- if (my_addmntent(mftmp, &(mc->m)) == 1) {
- int errsv = errno;
- error(_("error writing %s: %s"),
- _PATH_MOUNTED_TMP, strerror (errsv));
- goto leave;
- }
- }
-
- discard_mntentchn(mc0);
- mc0 = NULL;
-
- /*
- * We have to be paranoid with write() to avoid incomplete
- * /etc/mtab. Users are able to control writing by RLIMIT_FSIZE.
- */
- if (fflush(mftmp->mntent_fp) != 0) {
- int errsv = errno;
- error (_("%s: cannot fflush changes: %s"),
- _PATH_MOUNTED_TMP, strerror (errsv));
- goto leave;
- }
-
- fd = fileno(mftmp->mntent_fp);
-
- /*
- * It seems that better is incomplete and broken /etc/mtab that
- * /etc/mtab that is writeable for non-root users.
- *
- * We always skip rename() when chown() and chmod() failed.
- * -- kzak, 11-Oct-2007
- */
-
- if (fchmod(fd, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) < 0) {
- int errsv = errno;
- fprintf(stderr, _("error changing mode of %s: %s\n"),
- _PATH_MOUNTED_TMP, strerror (errsv));
- goto leave;
- }
-
- /*
- * If mount is setuid and some non-root user mounts sth,
- * then mtab.tmp might get the group of this user. Copy uid/gid
- * from the present mtab before renaming.
- */
- if (stat(_PATH_MOUNTED, &sbuf) == 0) {
- if (fchown(fd, sbuf.st_uid, sbuf.st_gid) < 0) {
- int errsv = errno;
- fprintf (stderr, _("error changing owner of %s: %s\n"),
- _PATH_MOUNTED_TMP, strerror(errsv));
- goto leave;
- }
- }
-
- my_endmntent (mftmp);
-
- /* rename mtemp to mtab */
- if (rename (_PATH_MOUNTED_TMP, _PATH_MOUNTED) < 0) {
- int errsv = errno;
- fprintf(stderr, _("can't rename %s to %s: %s\n"),
- _PATH_MOUNTED_TMP, _PATH_MOUNTED, strerror(errsv));
- }
-
- leave:
- if (mc0)
- discard_mntentchn(mc0);
- unlink(_PATH_MOUNTED_TMP);
- unlock_mtab();
-}
-
+++ /dev/null
-#ifndef MOUNT_FSTAB_H
-#define MOUNT_FSTAB_H
-
-#include "mount_mntent.h"
-
-int mtab_is_writable(void);
-int mtab_is_a_symlink(void);
-int mtab_does_not_exist(void);
-void reset_mtab_info(void);
-int is_mounted_once(const char *name);
-
-struct mntentchn {
- struct mntentchn *nxt, *prev;
- struct my_mntent m;
-};
-
-struct mntentchn *mtab_head (void);
-struct mntentchn *getmntfile (const char *name);
-struct mntentchn *getmntfilebackward (const char *name, struct mntentchn *mcprev);
-struct mntentchn *getmntoptfile (const char *file);
-struct mntentchn *getmntdirbackward (const char *dir, struct mntentchn *mc);
-struct mntentchn *getmntdevbackward (const char *dev, struct mntentchn *mc);
-
-struct mntentchn *fstab_head (void);
-struct mntentchn *getfs_by_dir (const char *dir);
-struct mntentchn *getfs_by_spec (const char *spec);
-struct mntentchn *getfs_by_devname (const char *devname);
-struct mntentchn *getfs_by_devdir (const char *dev, const char *dir);
-struct mntentchn *getfs_by_uuid (const char *uuid);
-struct mntentchn *getfs_by_label (const char *label);
-
-void lock_mtab (void);
-void unlock_mtab (void);
-void update_mtab (const char *special, struct my_mntent *with);
-
-char *get_option(const char *optname, const char *src, size_t *len);
-char *get_option_value(const char *list, const char *s);
-
-#endif /* MOUNT_FSTAB_H */
+++ /dev/null
-#include <unistd.h>
-#include <pwd.h>
-#include <sys/types.h>
-#include "getusername.h"
-
-char *
-getusername() {
- char *user = 0;
- struct passwd *pw = getpwuid(getuid());
-
- if (pw)
- user = pw->pw_name;
- return user;
-}
+++ /dev/null
-extern char *getusername(void);
+++ /dev/null
-.\" Copyright (c) 1996-2004 Andries Brouwer
-.\"
-.\" This page is somewhat derived from a page that was
-.\" (c) 1980, 1989, 1991 The Regents of the University of California
-.\" and had been heavily modified by Rik Faith and myself.
-.\" (Probably no BSD text remains.)
-.\" Fragments of text were written by Werner Almesberger, Remy Card,
-.\" Stephen Tweedie and Eric Youngdale.
-.\"
-.\" This is free documentation; 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.
-.\"
-.\" The GNU General Public License's references to "object code"
-.\" and "executables" are to be interpreted as the output of any
-.\" document formatting or typesetting system, including
-.\" intermediate and printed output.
-.\"
-.\" This manual is distributed in the hope that it will 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.
-.\"
-.\" 960705, aeb: version for mount-2.7g
-.\" 970114, aeb: xiafs and ext are dead; romfs is new
-.\" 970623, aeb: -F option
-.\" 970914, reg: -s option
-.\" 981111, K.Garloff: /etc/filesystems
-.\" 990111, aeb: documented /sbin/mount.smbfs
-.\" 990730, Yann Droneaud <lch@multimania.com>: updated page
-.\" 991214, Elrond <Elrond@Wunder-Nett.org>: added some docs on devpts
-.\" 010714, Michael K. Johnson <johnsonm@redhat.com> added -O
-.\" 010725, Nikita Danilov <NikitaDanilov@Yahoo.COM>: reiserfs options
-.\" 011124, Karl Eichwalder <ke@gnu.franken.de>: tmpfs options
-.\"
-.TH MOUNT 8 "December 2004" "util-linux" "System Administration"
-.SH NAME
-mount \- mount a filesystem
-.SH SYNOPSIS
-.B mount
-.RB [ \-lhV ]
-.LP
-.BI "mount \-a
-.RB [ \-fFnrsvw ]
-.RB [ \-t
-.IR vfstype ]
-.RB [ \-O
-.IR optlist ]
-.LP
-.B mount
-.RB [ \-fnrsvw ]
-.RB [ \-o
-.IR option [ \fB,\fPoption ]...]
-.IR device | dir
-.LP
-.B mount
-.RB [ \-fnrsvw ]
-.RB [ \-t
-.IB vfstype ]
-.RB [ \-o
-.IR options ]
-.I device dir
-.SH DESCRIPTION
-All files accessible in a Unix system are arranged in one big
-tree, the file hierarchy, rooted at
-.BR / .
-These files can be spread out over several devices. The
-.B mount
-command serves to attach the filesystem found on some device
-to the big file tree. Conversely, the
-.BR umount (8)
-command will detach it again.
-
-The standard form of the
-.B mount
-command, is
-.RS
-
-.br
-.BI "mount \-t" " type device dir"
-.br
-
-.RE
-This tells the kernel to attach the filesystem found on
-.I device
-(which is of type
-.IR type )
-at the directory
-.IR dir .
-The previous contents (if any) and owner and mode of
-.I dir
-become invisible, and as long as this filesystem remains mounted,
-the pathname
-.I dir
-refers to the root of the filesystem on
-.IR device .
-
-If only directory or device is given, for example:
-.RS
-
-.br
-.BI "mount /dir"
-.br
-
-.RE
-then mount looks for a mountpoint and if not found then for a device in the
-/etc/fstab file.
-
-.B The listing and help.
-.RS
-Three forms of invocation do not actually mount anything:
-.TP
-.B "mount \-h"
-prints a help message
-.TP
-.B "mount \-V"
-prints a version string
-.TP
-.BR "mount " [ -l "] [" "-t \fItype\fP" ]
-lists all mounted filesystems (of type
-.IR type ).
-The option \-l adds the labels in this listing.
-See below.
-.RE
-
-.B The device indication.
-.RS
-Most devices are indicated by a file name (of a block special device), like
-.IR /dev/sda1 ,
-but there are other possibilities. For example, in the case of an NFS mount,
-.I device
-may look like
-.IR knuth.cwi.nl:/dir .
-It is possible to indicate a block special device using its
-volume
-.B LABEL
-or
-.B UUID
-(see the \-L and \-U options below).
-
-The recommended setup is to use LABEL=<label> or UUID=<uuid> tags rather than
-.B /dev/disk/by-{label,uuid}
-udev symlinks in the /etc/fstab file. The tags are
-more readable, robust and portable. The
-.BR mount (8)
-command internally uses udev
-symlinks, so use the symlinks in /etc/fstab has no advantage over LABEL=/UUID=.
-For more details see
-.BR libblkid (3).
-
-Note that
-.BR mount (8)
-uses UUIDs as strings. The UUIDs from command line or
-.BR fstab (5)
-are not converted to internal binary representation. The string representation
-of the UUID should be based on lower case characters.
-
-The
-.I proc
-filesystem is not associated with a special device, and when
-mounting it, an arbitrary keyword, such as
-.I proc
-can be used instead of a device specification.
-(The customary choice
-.I none
-is less fortunate: the error message `none busy' from
-.B umount
-can be confusing.)
-.RE
-
-.B The /etc/fstab, /etc/mtab and /proc/mounts files.
-.RS
-The file
-.I /etc/fstab
-(see
-.BR fstab (5)),
-may contain lines describing what devices are usually
-mounted where, using which options.
-.LP
-The command
-.RS
-.sp
-.B mount \-a
-.RB [ \-t
-.IR type ]
-.RB [ \-O
-.IR optlist ]
-.sp
-.RE
-(usually given in a bootscript) causes all filesystems mentioned in
-.I fstab
-(of the proper type and/or having or not having the proper options)
-to be mounted as indicated, except for those whose line contains the
-.B noauto
-keyword. Adding the
-.B \-F
-option will make mount fork, so that the
-filesystems are mounted simultaneously.
-.LP
-When mounting a filesystem mentioned in
-.IR fstab
-or
-.IR mtab ,
-it suffices to give only the device, or only the mount point.
-
-
-The programs
-.B mount
-and
-.B umount
-maintain a list of currently mounted filesystems in the file
-.IR /etc/mtab .
-If no arguments are given to
-.BR mount ,
-this list is printed.
-
-The
-.B mount
-program does not read the
-.I /etc/fstab
-file if
-.I device
-(or LABEL/UUID) and
-.I dir
-are specified. For example:
-.RS
-.sp
-.B "mount /dev/foo /dir"
-.sp
-.RE
-If you want to override mount options from
-.I /etc/fstab
-you have to use:
-.RS
-.sp
-.B "mount device|dir -o <options>"
-.sp
-.RE
-and then the mount options from command line will be appended to
-the list of options from
-.IR /etc/fstab .
-The usual behaviour is that the last option wins if there is more duplicated
-options.
-
-When the
-.I proc
-filesystem is mounted (say at
-.IR /proc ),
-the files
-.I /etc/mtab
-and
-.I /proc/mounts
-have very similar contents. The former has somewhat
-more information, such as the mount options used,
-but is not necessarily up-to-date (cf. the
-.B \-n
-option below). It is possible to replace
-.I /etc/mtab
-by a symbolic link to
-.IR /proc/mounts ,
-and especially when you have very large numbers of mounts
-things will be much faster with that symlink,
-but some information is lost that way, and in particular
-using the "user" option will fail.
-.RE
-
-.B The non-superuser mounts.
-.RS
-Normally, only the superuser can mount filesystems.
-However, when
-.I fstab
-contains the
-.B user
-option on a line, anybody can mount the corresponding system.
-.LP
-Thus, given a line
-.RS
-.sp
-.B "/dev/cdrom /cd iso9660 ro,user,noauto,unhide"
-.sp
-.RE
-any user can mount the iso9660 filesystem found on his CDROM
-using the command
-.RS
-.sp
-.B "mount /dev/cdrom"
-.sp
-.RE
-or
-.RS
-.sp
-.B "mount /cd"
-.sp
-.RE
-For more details, see
-.BR fstab (5).
-Only the user that mounted a filesystem can unmount it again.
-If any user should be able to unmount, then use
-.B users
-instead of
-.B user
-in the
-.I fstab
-line.
-The
-.B owner
-option is similar to the
-.B user
-option, with the restriction that the user must be the owner
-of the special file. This may be useful e.g. for
-.I /dev/fd
-if a login script makes the console user owner of this device.
-The
-.B group
-option is similar, with the restriction that the user must be
-member of the group of the special file.
-.RE
-
-
-.B The bind mounts.
-.RS
-.\" In fact since 2.3.99. At first the syntax was mount -t bind.
-Since Linux 2.4.0 it is possible to remount part of the
-file hierarchy somewhere else. The call is
-.RS
-.br
-.B mount --bind
-.I olddir newdir
-.RE
-or shortoption
-.RS
-.br
-.B mount -B
-.I olddir newdir
-.RE
-or fstab entry is:
-.RS
-.br
-.I /olddir
-.I /newdir
-.B none bind
-.RE
-
-After this call the same contents is accessible in two places.
-One can also remount a single file (on a single file). It's also
-possible to use the bind mount to create a mountpoint from a regular
-directory, for example:
-
-.RS
-.br
-.B mount --bind
-.I foo foo
-.RE
-
-The bind mount call attaches only (part of) a single filesystem, not possible
-submounts. The entire file hierarchy including submounts is attached
-a second place using
-
-.RS
-.br
-.B mount --rbind
-.I olddir newdir
-.RE
-
-or shortoption
-
-.RS
-.br
-.B mount -R
-.I olddir newdir
-.RE
-.\" available since Linux 2.4.11.
-
-Note that the filesystem mount options will remain the same as those
-on the original mount point, and cannot be changed by passing the -o
-option along with --bind/--rbind. The mount options can be
-changed by a separate remount command, for example:
-
-.RS
-.br
-.B mount --bind
-.I olddir newdir
-.br
-.B mount -o remount,ro
-.I newdir
-.RE
-
-Note that behavior of the remount operation depends on the /etc/mtab file. The
-first command stores the 'bind' flag to the /etc/mtab file and the second
-command reads the flag from the file. If you have a system without the
-/etc/mtab file or if you explicitly define source and target for the remount
-command (then mount(8) does not read /etc/mtab), then you have to use bind flag
-(or option) for the remount command too. For example:
-
-.RS
-.br
-.B mount --bind
-.I olddir newdir
-.br
-.B mount -o remount,ro,bind
-.I olddir newdir
-.RE
-.RE
-
-.B The move operation.
-.RS
-Since Linux 2.5.1 it is possible to atomically move a
-.B mounted tree
-to another place. The call is
-.RS
-.br
-.B mount --move
-.I olddir newdir
-.RE
-or shortoption
-.RS
-.br
-.B mount -M
-.I olddir newdir
-.RE
-This will cause the contents which previously appeared under olddir to be
-accessed under newdir. The physical location of the files is not changed.
-Note that the
-.I olddir
-has to be a mountpoint.
-.RE
-
-.B The shared subtrees operations.
-.RS
-Since Linux 2.6.15 it is possible to mark a mount and its submounts as shared,
-private, slave or unbindable. A shared mount provides ability to create mirrors
-of that mount such that mounts and umounts within any of the mirrors propagate
-to the other mirror. A slave mount receives propagation from its master, but
-any not vice-versa. A private mount carries no propagation abilities. A
-unbindable mount is a private mount which cannot be cloned through a bind
-operation. Detailed semantics is documented in Documentation/filesystems/sharedsubtree.txt
-file in the kernel source tree.
-
-.RS
-.nf
-.BI "mount --make-shared " mountpoint
-.BI "mount --make-slave " mountpoint
-.BI "mount --make-private " mountpoint
-.BI "mount --make-unbindable " mountpoint
-.fi
-.RE
-
-The following commands allows one to recursively change the type of all the
-mounts under a given mountpoint.
-
-.RS
-.nf
-.BI "mount --make-rshared " mountpoint
-.BI "mount --make-rslave " mountpoint
-.BI "mount --make-rprivate " mountpoint
-.BI "mount --make-runbindable " mountpoint
-.fi
-.RE
-.RE
-
-.SH COMMAND LINE OPTIONS
-The full set of mount options used by an invocation of
-.B mount
-is determined by first extracting the
-mount options for the filesystem from the
-.I fstab
-table, then applying any options specified by the
-.B \-o
-argument, and finally applying a
-.BR \-r " or " \-w
-option, when present.
-
-Command line options available for the
-.B mount
-command:
-.IP "\fB\-V, \-\-version\fP"
-Display version information and exit.
-.IP "\fB\-h, \-\-help\fP"
-Display help text and exit.
-.IP "\fB\-v, \-\-verbose\fP"
-Verbose mode.
-.IP "\fB\-a, \-\-all\fP"
-Mount all filesystems (of the given types) mentioned in
-.IR fstab .
-.IP "\fB\-F, \-\-fork\fP"
-(Used in conjunction with
-.BR \-a .)
-Fork off a new incarnation of mount for each device.
-This will do the mounts on different devices or different NFS servers
-in parallel.
-This has the advantage that it is faster; also NFS timeouts go in
-parallel. A disadvantage is that the mounts are done in undefined order.
-Thus, you cannot use this option if you want to mount both
-.I /usr
-and
-.IR /usr/spool .
-.IP "\fB\-f, \-\-fake\fP"
-Causes everything to be done except for the actual system call; if it's not
-obvious, this ``fakes'' mounting the filesystem. This option is useful in
-conjunction with the
-.B \-v
-flag to determine what the
-.B mount
-command is trying to do. It can also be used to add entries for devices
-that were mounted earlier with the -n option. The -f option checks for
-existing record in /etc/mtab and fails when the record already
-exists (with regular non-fake mount, this check is done by kernel).
-.IP "\fB\-i, \-\-internal\-only\fP"
-Don't call the /sbin/mount.<filesystem> helper even if it exists.
-.IP "\fB\-l\fP"
-Add the labels in the mount output. Mount must have
-permission to read the disk device (e.g. be suid root) for this to work.
-One can set such a label for ext2, ext3 or ext4 using the
-.BR e2label (8)
-utility, or for XFS using
-.BR xfs_admin (8),
-or for reiserfs using
-.BR reiserfstune (8).
-.IP "\fB\-n, \-\-no\-mtab\fP"
-Mount without writing in
-.IR /etc/mtab .
-This is necessary for example when
-.I /etc
-is on a read-only filesystem.
-.IP "\fB\-\-no\-canonicalize\fP"
-Don't canonicalize paths. The mount command canonicalizes all paths
-(from command line or fstab) and stores canonicalized paths to the
-.IR /etc/mtab
-file. This option can be used together with the
-.B \-f
-flag for already canonicalized absolute paths.
-.IP "\fB\-s\fP"
-Tolerate sloppy mount options rather than failing. This will ignore
-mount options not supported by a filesystem type. Not all filesystems
-support this option. This option exists for support of the Linux
-autofs\-based automounter.
-.IP "\fB\-r, \-\-read\-only\fP"
-Mount the filesystem read-only. A synonym is
-.BR "\-o ro" .
-
-Note that, depending on the filesystem type, state and kernel behavior, the
-system may still write to the device. For example, Ext3 or ext4 will replay its
-journal if the filesystem is dirty. To prevent this kind of write access, you
-may want to mount ext3 or ext4 filesystem with "ro,noload" mount options or
-set the block device to read-only mode, see command
-.BR blockdev (8).
-.IP "\fB\-w, \-\-rw\fP"
-Mount the filesystem read/write. This is the default. A synonym is
-.BR "\-o rw" .
-.IP "\fB\-L \fIlabel\fP"
-Mount the partition that has the specified
-.IR label .
-.IP "\fB\-U \fIuuid\fP"
-Mount the partition that has the specified
-.IR uuid .
-These two options require the file
-.I /proc/partitions
-(present since Linux 2.1.116) to exist.
-.IP "\fB\-t, \-\-types \fIvfstype\fP"
-The argument following the
-.B \-t
-is used to indicate the filesystem type. The filesystem types which are
-currently supported include:
-.IR adfs ,
-.IR affs ,
-.IR autofs ,
-.IR cifs ,
-.IR coda ,
-.IR coherent ,
-.IR cramfs ,
-.IR debugfs ,
-.IR devpts ,
-.IR efs ,
-.IR ext ,
-.IR ext2 ,
-.IR ext3 ,
-.IR ext4 ,
-.IR hfs ,
-.IR hfsplus ,
-.IR hpfs ,
-.IR iso9660 ,
-.IR jfs ,
-.IR minix ,
-.IR msdos ,
-.IR ncpfs ,
-.IR nfs ,
-.IR nfs4 ,
-.IR ntfs ,
-.IR proc ,
-.IR qnx4 ,
-.IR ramfs ,
-.IR reiserfs ,
-.IR romfs ,
-.IR squashfs ,
-.IR smbfs ,
-.IR sysv ,
-.IR tmpfs ,
-.IR ubifs ,
-.IR udf ,
-.IR ufs ,
-.IR umsdos ,
-.IR usbfs ,
-.IR vfat ,
-.IR xenix ,
-.IR xfs ,
-.IR xiafs .
-Note that coherent, sysv and xenix are equivalent and that
-.I xenix
-and
-.I coherent
-will be removed at some point in the future \(em use
-.I sysv
-instead. Since kernel version 2.1.21 the types
-.I ext
-and
-.I xiafs
-do not exist anymore. Earlier,
-.I usbfs
-was known as
-.IR usbdevfs .
-Note, the real list of all supported filesystems depends on your
-kernel.
-
-The programs
-.B mount
-and
-.B umount
-support filesystem subtypes. The subtype is defined by '.subtype' suffix. For
-example 'fuse.sshfs'. It's recommended to use subtype notation rather than add
-any prefix to the mount source (for example 'sshfs#example.com' is
-depreacated).
-
-For most types all the
-.B mount
-program has to do is issue a simple
-.IR mount (2)
-system call, and no detailed knowledge of the filesystem type is required.
-For a few types however (like nfs, nfs4, cifs, smbfs, ncpfs) ad hoc code is
-necessary. The nfs, nfs4, cifs, smbfs, and ncpfs filesystems
-have a separate mount program. In order to make it possible to
-treat all types in a uniform way, mount will execute the program
-.BI /sbin/mount. TYPE
-(if that exists) when called with type
-.IR TYPE .
-Since various versions of the
-.B smbmount
-program have different calling conventions,
-.B /sbin/mount.smbfs
-may have to be a shell script that sets up the desired call.
-
-If no
-.B \-t
-option is given, or if the
-.B auto
-type is specified, mount will try to guess the desired type.
-Mount uses the blkid library for guessing the filesystem
-type; if that does not turn up anything that looks familiar,
-mount will try to read the file
-.IR /etc/filesystems ,
-or, if that does not exist,
-.IR /proc/filesystems .
-All of the filesystem types listed there will be tried,
-except for those that are labeled "nodev" (e.g.,
-.IR devpts ,
-.I proc
-and
-.IR nfs ).
-If
-.I /etc/filesystems
-ends in a line with a single * only, mount will read
-.I /proc/filesystems
-afterwards.
-
-The
-.B auto
-type may be useful for user-mounted floppies.
-Creating a file
-.I /etc/filesystems
-can be useful to change the probe order (e.g., to try vfat before msdos
-or ext3 before ext2) or if you use a kernel module autoloader.
-
-More than one type may be specified in a comma separated
-list. The list of filesystem types can be prefixed with
-.B no
-to specify the filesystem types on which no action should be taken.
-(This can be meaningful with the
-.B \-a
-option.) For example, the command:
-.RS
-.RS
-.sp
-.B "mount \-a \-t nomsdos,ext"
-.sp
-.RE
-mounts all filesystems except those of type
-.I msdos
-and
-.IR ext .
-.RE
-.IP "\fB\-O, \-\-test-opts \fIopts\fP"
-Used in conjunction with
-.BR \-a ,
-to limit the set of filesystems to which the
-.B \-a
-is applied. Like
-.B \-t
-in this regard except that it is useless except in the context of
-.BR \-a .
-For example, the command:
-.RS
-.RS
-.sp
-.B "mount \-a \-O no_netdev"
-.sp
-.RE
-mounts all filesystems except those which have the option
-.I _netdev
-specified in the options field in the
-.I /etc/fstab
-file.
-
-It is different from
-.B \-t
-in that each option is matched exactly; a leading
-.B no
-at the beginning of one option does not negate the rest.
-
-The
-.B \-t
-and
-.B \-O
-options are cumulative in effect; that is, the command
-.RS
-.sp
-.B "mount \-a \-t ext2 \-O _netdev"
-.sp
-.RE
-mounts all ext2 filesystems with the _netdev option, not all filesystems
-that are either ext2 or have the _netdev option specified.
-.RE
-.IP "\fB\-o, \-\-options \fIopts\fP"
-Options are specified with a
-.B \-o
-flag followed by a comma separated string of options. For example:
-.RS
-.RS
-.sp
-.B "mount LABEL=mydisk \-o noatime,nouser"
-.sp
-.RE
-
-For more details, see
-.B FILESYSTEM INDEPENDENT MOUNT OPTIONS
-and
-.B FILESYSTEM SPECIFIC MOUNT OPTIONS
-sections.
-.RE
-.IP "\fB\-B, \-\-bind\fP"
-Remount a subtree somewhere else (so that its contents are available
-in both places). See above.
-.IP "\fB\-R, \-\-rbind\fP"
-Remount a subtree and all possible submounts somewhere else (so that its
-contents are available in both places). See above.
-.IP "\fB\-M, \-\-move\fP"
-Move a subtree to some other place. See above.
-
-.SH FILESYSTEM INDEPENDENT MOUNT OPTIONS
-Some of these options are only useful when they appear in the
-.I /etc/fstab
-file.
-
-Some of these options could be enabled or disabled by default
-in the system kernel. To check the current setting see the options
-in /proc/mounts.
-
-The following options apply to any filesystem that is being
-mounted (but not every filesystem actually honors them - e.g., the
-.B sync
-option today has effect only for ext2, ext3, fat, vfat and ufs):
-
-.TP
-.B async
-All I/O to the filesystem should be done asynchronously. (See also the
-.B sync
-option.)
-.TP
-.B atime
-Do not use noatime feature, then the inode access time is controlled by kernel
-defaults. See also the description for
-.B strictatime
-and
-.B relatime
-mount options.
-.TP
-.B noatime
-Do not update inode access times on this filesystem (e.g., for faster
-access on the news spool to speed up news servers).
-.TP
-.B auto
-Can be mounted with the
-.B \-a
-option.
-.TP
-.B noauto
-Can only be mounted explicitly (i.e., the
-.B \-a
-option will not cause the filesystem to be mounted).
-.TP
-\fBcontext=\fP\fIcontext\fP, \fBfscontext=\fP\fIcontext\fP, \fBdefcontext=\fP\fIcontext\fP and \fBrootcontext=\fP\fIcontext\fP
-The
-.BR context=
-option is useful when mounting filesystems that do not support
-extended attributes, such as a floppy or hard disk formatted with VFAT, or
-systems that are not normally running under SELinux, such as an ext3 formatted
-disk from a non-SELinux workstation. You can also use
-.BR context=
-on filesystems you do not trust, such as a floppy. It also helps in compatibility with
-xattr-supporting filesystems on earlier 2.4.<x> kernel versions. Even where
-xattrs are supported, you can save time not having to label every file by
-assigning the entire disk one security context.
-
-A commonly used option for removable media is
-.BR context="system_u:object_r:removable_t" .
-
-Two other options are
-.BR fscontext=
-and
-.BR defcontext= ,
-both of which are mutually exclusive of the context option. This means you
-can use fscontext and defcontext with each other, but neither can be used with
-context.
-
-The
-.BR fscontext=
-option works for all filesystems, regardless of their xattr
-support. The fscontext option sets the overarching filesystem label to a
-specific security context. This filesystem label is separate from the
-individual labels on the files. It represents the entire filesystem for
-certain kinds of permission checks, such as during mount or file creation.
-Individual file labels are still obtained from the xattrs on the files
-themselves. The context option actually sets the aggregate context that
-fscontext provides, in addition to supplying the same label for individual
-files.
-
-You can set the default security context for unlabeled files using
-.BR defcontext=
-option. This overrides the value set for unlabeled files in the policy and requires a
-filesystem that supports xattr labeling.
-
-The
-.BR rootcontext=
-option allows you to explicitly label the root inode of a FS being mounted
-before that FS or inode because visible to userspace. This was found to be
-useful for things like stateless linux.
-
-Note that kernel rejects any remount request that includes the context
-option even if unchanged from the current context.
-
-.B Warning that \fIcontext\fP value might contains comma
-and in this case the value has to be properly quoted otherwise
-.BR mount (8)
-will interpret the comma as separator between mount options. Don't forget that
-shell strips off quotes and
-.BR "double quoting is required" ,
-for example:
-.RS
-.RS
-.sp
-mount -t tmpfs none /mnt \-o 'context="system_u:object_r:tmp_t:s0:c127,c456",noexec'
-.sp
-.RE
-
-For more details, see
-.BR selinux (8)
-.RE
-
-.TP
-.B defaults
-Use default options:
-.BR rw ", " suid ", " dev ", " exec ", " auto ", " nouser ", and " async.
-.TP
-.B dev
-Interpret character or block special devices on the filesystem.
-.TP
-.B nodev
-Do not interpret character or block special devices on the file
-system.
-.TP
-.B diratime
-Update directory inode access times on this filesystem. This is the default.
-.TP
-.B nodiratime
-Do not update directory inode access times on this filesystem.
-.TP
-.B dirsync
-All directory updates within the filesystem should be done synchronously.
-This affects the following system calls: creat, link, unlink, symlink,
-mkdir, rmdir, mknod and rename.
-.TP
-.B exec
-Permit execution of binaries.
-.TP
-.B noexec
-Do not allow direct execution of any binaries on the mounted filesystem.
-(Until recently it was possible to run binaries anyway using a command like
-/lib/ld*.so /mnt/binary. This trick fails since Linux 2.4.25 / 2.6.0.)
-.TP
-.B group
-Allow an ordinary (i.e., non-root) user to mount the filesystem if one
-of his groups matches the group of the device.
-This option implies the options
-.BR nosuid " and " nodev
-(unless overridden by subsequent options, as in the option line
-.BR group,dev,suid ).
-.TP
-.B iversion
-Every time the inode is modified, the i_version field will be incremented.
-.TP
-.B noiversion
-Do not increment the i_version inode field.
-.TP
-.B mand
-Allow mandatory locks on this filesystem. See
-.BR fcntl (2).
-.TP
-.B nomand
-Do not allow mandatory locks on this filesystem.
-.TP
-.B _netdev
-The filesystem resides on a device that requires network access
-(used to prevent the system from attempting to mount these filesystems
-until the network has been enabled on the system).
-.TP
-.B nofail
-Do not report errors for this device if it does not exist.
-.TP
-.B relatime
-Update inode access times relative to modify or change time. Access
-time is only updated if the previous access time was earlier than the
-current modify or change time. (Similar to noatime, but doesn't break
-mutt or other applications that need to know if a file has been read
-since the last time it was modified.)
-
-Since Linux 2.6.30, the kernel defaults to the behavior provided by this
-option (unless
-.B noatime
-was specified), and the
-.B strictatime
-option is required to obtain traditional semantics. In addition, since Linux
-2.6.30, the file's last access time is always updated if it is more than 1
-day old.
-.TP
-.B norelatime
-Do not use
-.B relatime
-feature. See also the
-.B strictatime
-mount option.
-.TP
-.B strictatime
-Allows to explicitly requesting full atime updates. This makes it
-possible for kernel to defaults to
-.B relatime
-or
-.B noatime
-but still allow userspace to override it. For more details about the default
-system mount options see /proc/mounts.
-.TP
-.B nostrictatime
-Use the kernel's default behaviour for inode access time updates.
-.TP
-.B suid
-Allow set-user-identifier or set-group-identifier bits to take
-effect.
-.TP
-.B nosuid
-Do not allow set-user-identifier or set-group-identifier bits to take
-effect. (This seems safe, but is in fact rather unsafe if you have
-suidperl(1) installed.)
-.TP
-.B silent
-Turn on the silent flag.
-.TP
-.B loud
-Turn off the silent flag.
-.TP
-.B owner
-Allow an ordinary (i.e., non-root) user to mount the filesystem if he
-is the owner of the device.
-This option implies the options
-.BR nosuid " and " nodev
-(unless overridden by subsequent options, as in the option line
-.BR owner,dev,suid ).
-.TP
-.B remount
-Attempt to remount an already-mounted filesystem. This is commonly
-used to change the mount flags for a filesystem, especially to make a
-readonly filesystem writable. It does not change device or mount point.
-
-The remount functionality follows the standard way how the mount command works
-with options from fstab. It means the mount command doesn't read fstab (or
-mtab) only when a
-.IR device
-and
-.IR dir
-are fully specified.
-
-.BR "mount -o remount,rw /dev/foo /dir"
-
-After this call all old mount options are replaced and arbitrary stuff from
-fstab is ignored, except the loop= option which is internally generated and
-maintained by the mount command.
-
-.BR "mount -o remount,rw /dir"
-
-After this call mount reads fstab (or mtab) and merges these options with
-options from command line (
-.B -o
-).
-.TP
-.B ro
-Mount the filesystem read-only.
-.TP
-.B rw
-Mount the filesystem read-write.
-.TP
-.B sync
-All I/O to the filesystem should be done synchronously. In case of media with limited number of write cycles
-(e.g. some flash drives) "sync" may cause life-cycle shortening.
-.TP
-.B user
-Allow an ordinary user to mount the filesystem.
-The name of the mounting user is written to mtab so that he can unmount
-the filesystem again.
-This option implies the options
-.BR noexec ", " nosuid ", and " nodev
-(unless overridden by subsequent options, as in the option line
-.BR user,exec,dev,suid ).
-.TP
-.B nouser
-Forbid an ordinary (i.e., non-root) user to mount the filesystem.
-This is the default.
-.TP
-.B users
-Allow every user to mount and unmount the filesystem.
-This option implies the options
-.BR noexec ", " nosuid ", and " nodev
-(unless overridden by subsequent options, as in the option line
-.BR users,exec,dev,suid ).
-
-.SH "FILESYSTEM SPECIFIC MOUNT OPTIONS"
-The following options apply only to certain filesystems.
-We sort them by filesystem. They all follow the
-.B \-o
-flag.
-
-What options are supported depends a bit on the running kernel.
-More info may be found in the kernel source subdirectory
-.IR Documentation/filesystems .
-
-.SH "Mount options for adfs"
-.TP
-\fBuid=\fP\fIvalue\fP and \fBgid=\fP\fIvalue\fP
-Set the owner and group of the files in the filesystem (default: uid=gid=0).
-.TP
-\fBownmask=\fP\fIvalue\fP and \fBothmask=\fP\fIvalue\fP
-Set the permission mask for ADFS 'owner' permissions and 'other' permissions,
-respectively (default: 0700 and 0077, respectively).
-See also
-.IR /usr/src/linux/Documentation/filesystems/adfs.txt .
-.SH "Mount options for affs"
-.TP
-\fBuid=\fP\fIvalue\fP and \fBgid=\fP\fIvalue\fP
-Set the owner and group of the root of the filesystem (default: uid=gid=0,
-but with option
-.B uid
-or
-.B gid
-without specified value, the uid and gid of the current process are taken).
-.TP
-\fBsetuid=\fP\fIvalue\fP and \fBsetgid=\fP\fIvalue\fP
-Set the owner and group of all files.
-.TP
-.BI mode= value
-Set the mode of all files to
-.IR value " & 0777"
-disregarding the original permissions.
-Add search permission to directories that have read permission.
-The value is given in octal.
-.TP
-.B protect
-Do not allow any changes to the protection bits on the filesystem.
-.TP
-.B usemp
-Set uid and gid of the root of the filesystem to the uid and gid
-of the mount point upon the first sync or umount, and then
-clear this option. Strange...
-.TP
-.B verbose
-Print an informational message for each successful mount.
-.TP
-.BI prefix= string
-Prefix used before volume name, when following a link.
-.TP
-.BI volume= string
-Prefix (of length at most 30) used before '/' when following a symbolic link.
-.TP
-.BI reserved= value
-(Default: 2.) Number of unused blocks at the start of the device.
-.TP
-.BI root= value
-Give explicitly the location of the root block.
-.TP
-.BI bs= value
-Give blocksize. Allowed values are 512, 1024, 2048, 4096.
-.TP
-.BR grpquota | noquota | quota | usrquota
-These options are accepted but ignored.
-(However, quota utilities may react to such strings in
-.IR /etc/fstab .)
-
-.SH "Mount options for cifs"
-See the options section of the
-.BR mount.cifs (8)
-man page (cifs-utils package must be installed).
-
-.SH "Mount options for coherent"
-None.
-
-.SH "Mount options for debugfs"
-The debugfs filesystem is a pseudo filesystem, traditionally mounted on
-.IR /sys/kernel/debug .
-.\" or just /debug
-.\" present since 2.6.11
-There are no mount options.
-
-.SH "Mount options for devpts"
-The devpts filesystem is a pseudo filesystem, traditionally mounted on
-.IR /dev/pts .
-In order to acquire a pseudo terminal, a process opens
-.IR /dev/ptmx ;
-the number of the pseudo terminal is then made available to the process
-and the pseudo terminal slave can be accessed as
-.IR /dev/pts/ <number>.
-.TP
-\fBuid=\fP\fIvalue\fP and \fBgid=\fP\fIvalue\fP
-This sets the owner or the group of newly created PTYs to
-the specified values. When nothing is specified, they will
-be set to the UID and GID of the creating process.
-For example, if there is a tty group with GID 5, then
-.B gid=5
-will cause newly created PTYs to belong to the tty group.
-.TP
-.BI mode= value
-Set the mode of newly created PTYs to the specified value.
-The default is 0600.
-A value of
-.B mode=620
-and
-.B gid=5
-makes "mesg y" the default on newly created PTYs.
-.TP
-\fBnewinstance
-Create a private instance of devpts filesystem, such that
-indices of ptys allocated in this new instance are
-independent of indices created in other instances of devpts.
-
-All mounts of devpts without this
-.B newinstance
-option share the same set of pty indices (i.e legacy mode).
-Each mount of devpts with the
-.B newinstance
-option has a private set of pty indices.
-
-This option is mainly used to support containers in the
-linux kernel. It is implemented in linux kernel versions
-starting with 2.6.29. Further, this mount option is valid
-only if CONFIG_DEVPTS_MULTIPLE_INSTANCES is enabled in the
-kernel configuration.
-
-To use this option effectively,
-.IR /dev/ptmx
-must be a symbolic link to
-.IR pts/ptmx.
-See
-.IR Documentation/filesystems/devpts.txt
-in the linux kernel source tree for details.
-.TP
-.BI ptmxmode= value
-
-Set the mode for the new
-.IR ptmx
-device node in the devpts filesystem.
-
-With the support for multiple instances of devpts (see
-.B newinstance
-option above), each instance has a private
-.IR ptmx
-node in the root of the devpts filesystem (typically
-.IR /dev/pts/ptmx).
-
-For compatibility with older versions of the kernel, the
-default mode of the new
-.IR ptmx
-node is 0000.
-.BI ptmxmode= value
-specifies a more useful mode for the
-.IR ptmx
-node and is highly recommended when the
-.B newinstance
-option is specified.
-
-This option is only implemented in linux kernel versions
-starting with 2.6.29. Further this option is valid only if
-CONFIG_DEVPTS_MULTIPLE_INSTANCES is enabled in the kernel
-configuration.
-
-.SH "Mount options for ext"
-None.
-Note that the `ext' filesystem is obsolete. Don't use it.
-Since Linux version 2.1.21 extfs is no longer part of the kernel source.
-
-.SH "Mount options for ext2"
-The `ext2' filesystem is the standard Linux filesystem.
-.\" Due to a kernel bug, it may be mounted with random mount options
-.\" (fixed in Linux 2.0.4).
-Since Linux 2.5.46, for most mount options the default
-is determined by the filesystem superblock. Set them with
-.BR tune2fs (8).
-.TP
-.BR acl | noacl
-Support POSIX Access Control Lists (or not).
-.\" requires CONFIG_EXT2_FS_POSIX_ACL
-.TP
-.BR bsddf | minixdf
-Set the behaviour for the
-.I statfs
-system call. The
-.B minixdf
-behaviour is to return in the
-.I f_blocks
-field the total number of blocks of the filesystem, while the
-.B bsddf
-behaviour (which is the default) is to subtract the overhead blocks
-used by the ext2 filesystem and not available for file storage. Thus
-.nf
-
-% mount /k -o minixdf; df /k; umount /k
-Filesystem 1024-blocks Used Available Capacity Mounted on
-/dev/sda6 2630655 86954 2412169 3% /k
-% mount /k -o bsddf; df /k; umount /k
-Filesystem 1024-blocks Used Available Capacity Mounted on
-/dev/sda6 2543714 13 2412169 0% /k
-
-.fi
-(Note that this example shows that one can add command line options
-to the options given in
-.IR /etc/fstab .)
-
-.TP
-.BR check=none " or " nocheck
-No checking is done at mount time. This is the default. This is fast.
-It is wise to invoke
-.BR e2fsck (8)
-every now and then, e.g. at boot time. The non-default behavior is unsupported
-(check=normal and check=strict options have been removed). Note that these mount options
-don't have to be supported if ext4 kernel driver is used for ext2 and ext3 filesystems.
-.TP
-.B debug
-Print debugging info upon each (re)mount.
-.TP
-.BR errors= { continue | remount-ro | panic }
-Define the behaviour when an error is encountered.
-(Either ignore errors and just mark the filesystem erroneous and continue,
-or remount the filesystem read-only, or panic and halt the system.)
-The default is set in the filesystem superblock, and can be
-changed using
-.BR tune2fs (8).
-.TP
-.BR grpid | bsdgroups " and " nogrpid | sysvgroups
-These options define what group id a newly created file gets.
-When
-.BR grpid
-is set, it takes the group id of the directory in which it is created;
-otherwise (the default) it takes the fsgid of the current process, unless
-the directory has the setgid bit set, in which case it takes the gid
-from the parent directory, and also gets the setgid bit set
-if it is a directory itself.
-.TP
-.BR grpquota | noquota | quota | usrquota
-These options are accepted but ignored.
-.TP
-.BR nouid32
-Disables 32-bit UIDs and GIDs. This is for interoperability with older
-kernels which only store and expect 16-bit values.
-.TP
-.BR oldalloc " or " orlov
-Use old allocator or Orlov allocator for new inodes. Orlov is default.
-.TP
-\fBresgid=\fP\fIn\fP and \fBresuid=\fP\fIn\fP
-The ext2 filesystem reserves a certain percentage of the available
-space (by default 5%, see
-.BR mke2fs (8)
-and
-.BR tune2fs (8)).
-These options determine who can use the reserved blocks.
-(Roughly: whoever has the specified uid, or belongs to the specified group.)
-.TP
-.BI sb= n
-Instead of block 1, use block
-.I n
-as superblock. This could be useful when the filesystem has been damaged.
-(Earlier, copies of the superblock would be made every 8192 blocks: in
-block 1, 8193, 16385, ... (and one got thousands of copies on
-a big filesystem). Since version 1.08,
-.B mke2fs
-has a \-s (sparse superblock) option to reduce the number of backup
-superblocks, and since version 1.15 this is the default. Note
-that this may mean that ext2 filesystems created by a recent
-.B mke2fs
-cannot be mounted r/w under Linux 2.0.*.)
-The block number here uses 1k units. Thus, if you want to use logical
-block 32768 on a filesystem with 4k blocks, use "sb=131072".
-.TP
-.BR user_xattr | nouser_xattr
-Support "user." extended attributes (or not).
-.\" requires CONFIG_EXT2_FS_XATTR
-
-
-.SH "Mount options for ext3"
-The ext3 filesystem is a version of the ext2 filesystem which has been
-enhanced with journaling. It supports the same options as ext2 as
-well as the following additions:
-.\" .TP
-.\" .BR abort
-.\" Mount the filesystem in abort mode, as if a fatal error has occurred.
-.TP
-.BR journal=update
-Update the ext3 filesystem's journal to the current format.
-.TP
-.BR journal=inum
-When a journal already exists, this option is ignored. Otherwise, it
-specifies the number of the inode which will represent the ext3 filesystem's
-journal file; ext3 will create a new journal, overwriting the old contents
-of the file whose inode number is
-.IR inum .
-.TP
-.BR journal_dev=devnum
-When the external journal device's major/minor numbers
-have changed, this option allows the user to specify
-the new journal location. The journal device is
-identified through its new major/minor numbers encoded
-in devnum.
-.TP
-.BR norecovery / noload
-Don't load the journal on mounting. Note that
-if the filesystem was not unmounted cleanly,
-skipping the journal replay will lead to the
-filesystem containing inconsistencies that can
-lead to any number of problems.
-.TP
-.BR data= { journal | ordered | writeback }
-Specifies the journaling mode for file data. Metadata is always journaled.
-To use modes other than
-.B ordered
-on the root filesystem, pass the mode to the kernel as boot parameter, e.g.
-.IR rootflags=data=journal .
-.RS
-.TP
-.B journal
-All data is committed into the journal prior to being written into the
-main filesystem.
-.TP
-.B ordered
-This is the default mode. All data is forced directly out to the main file
-system prior to its metadata being committed to the journal.
-.TP
-.B writeback
-Data ordering is not preserved - data may be written into the main
-filesystem after its metadata has been committed to the journal.
-This is rumoured to be the highest-throughput option. It guarantees
-internal filesystem integrity, however it can allow old data to appear
-in files after a crash and journal recovery.
-.RE
-.TP
-.BR barrier=0 " / " barrier=1 "
-This enables/disables barriers. barrier=0 disables it, barrier=1 enables it.
-Write barriers enforce proper on-disk ordering of journal commits, making
-volatile disk write caches safe to use, at some performance penalty. The ext3
-filesystem does not enable write barriers by default. Be sure to enable
-barriers unless your disks are battery-backed one way or another. Otherwise
-you risk filesystem corruption in case of power failure.
-.TP
-.BI commit= nrsec
-Sync all data and metadata every
-.I nrsec
-seconds. The default value is 5 seconds. Zero means default.
-.TP
-.BR user_xattr
-Enable Extended User Attributes. See the
-.BR attr (5)
-manual page.
-.TP
-.BR acl
-Enable POSIX Access Control Lists. See the
-.BR acl (5)
-manual page.
-
-.SH "Mount options for ext4"
-The ext4 filesystem is an advanced level of the ext3 filesystem which
-incorporates scalability and reliability enhancements for supporting large
-filesystem.
-
-The options
-.B journal_dev, noload, data, commit, orlov, oldalloc, [no]user_xattr
-.B [no]acl, bsddf, minixdf, debug, errors, data_err, grpid, bsdgroups, nogrpid
-.B sysvgroups, resgid, resuid, sb, quota, noquota, grpquota and usrquota
-are backwardly compatible with ext3 or ext2.
-.TP
-.BR journal_checksum
-Enable checksumming of the journal transactions. This will allow the recovery
-code in e2fsck and the kernel to detect corruption in the kernel. It is a
-compatible change and will be ignored by older kernels.
-.TP
-.BR journal_async_commit
-Commit block can be written to disk without waiting for descriptor blocks. If
-enabled older kernels cannot mount the device.
-This will enable 'journal_checksum' internally.
-.TP
-.BR barrier=0 " / " barrier=1 " / " barrier " / " nobarrier
-This enables/disables the use of write barriers in the jbd code. barrier=0
-disables, barrier=1 enables. This also requires an IO stack which can support
-barriers, and if jbd gets an error on a barrier write, it will disable again
-with a warning. Write barriers enforce proper on-disk ordering of journal
-commits, making volatile disk write caches safe to use, at some performance
-penalty. If your disks are battery-backed in one way or another, disabling
-barriers may safely improve performance. The mount options "barrier" and
-"nobarrier" can also be used to enable or disable barriers, for consistency
-with other ext4 mount options.
-
-The ext4 filesystem enables write barriers by default.
-.TP
-.BI inode_readahead= n
-This tuning parameter controls the maximum number of inode table blocks that
-ext4's inode table readahead algorithm will pre-read into the buffer cache.
-The default value is 32 blocks.
-.TP
-.BI stripe= n
-Number of filesystem blocks that mballoc will try to use for allocation size
-and alignment. For RAID5/6 systems this should be the number of data disks *
-RAID chunk size in filesystem blocks.
-.TP
-.BR delalloc
-Deferring block allocation until write-out time.
-.TP
-.BR nodelalloc
-Disable delayed allocation. Blocks are allocated when data is copied from user
-to page cache.
-.TP
-.BI max_batch_time= usec
-Maximum amount of time ext4 should wait for additional filesystem operations to
-be batch together with a synchronous write operation. Since a synchronous
-write operation is going to force a commit and then a wait for the I/O
-complete, it doesn't cost much, and can be a huge throughput win, we wait for a
-small amount of time to see if any other transactions can piggyback on the
-synchronous write. The algorithm used is designed to automatically tune for
-the speed of the disk, by measuring the amount of time (on average) that it
-takes to finish committing a transaction. Call this time the "commit time".
-If the time that the transaction has been running is less than the commit time,
-ext4 will try sleeping for the commit time to see if other operations will join
-the transaction. The commit time is capped by the max_batch_time, which
-defaults to 15000us (15ms). This optimization can be turned off entirely by
-setting max_batch_time to 0.
-.TP
-.BI min_batch_time= usec
-This parameter sets the commit time (as described above) to be at least
-min_batch_time. It defaults to zero microseconds. Increasing this parameter
-may improve the throughput of multi-threaded, synchronous workloads on very
-fast disks, at the cost of increasing latency.
-.TP
-.BI journal_ioprio= prio
-The I/O priority (from 0 to 7, where 0 is the highest priority) which should be
-used for I/O operations submitted by kjournald2 during a commit operation.
-This defaults to 3, which is a slightly higher priority than the default I/O
-priority.
-.TP
-.BR abort
-Simulate the effects of calling ext4_abort() for
-debugging purposes. This is normally used while
-remounting a filesystem which is already mounted.
-.TP
-.BR auto_da_alloc | noauto_da_alloc
-Many broken applications don't use fsync() when
-replacing existing files via patterns such as
-
-fd = open("foo.new")/write(fd,..)/close(fd)/ rename("foo.new", "foo")
-
-or worse yet
-
-fd = open("foo", O_TRUNC)/write(fd,..)/close(fd).
-
-If auto_da_alloc is enabled, ext4 will detect the replace-via-rename and
-replace-via-truncate patterns and force that any delayed allocation blocks are
-allocated such that at the next journal commit, in the default data=ordered
-mode, the data blocks of the new file are forced to disk before the rename()
-operation is committed. This provides roughly the same level of guarantees as
-ext3, and avoids the "zero-length" problem that can happen when a system
-crashes before the delayed allocation blocks are forced to disk.
-.TP
-.BR discard / nodiscard
-Controls whether ext4 should issue discard/TRIM commands to the underlying
-block device when blocks are freed. This is useful for SSD devices and
-sparse/thinly-provisioned LUNs, but it is off by default until sufficient
-testing has been done.
-.TP
-.BR nouid32
-Disables 32-bit UIDs and GIDs. This is for
-interoperability with older kernels which only
-store and expect 16-bit values.
-.TP
-.BR resize
-Allows to resize filesystem to the end of the last
-existing block group, further resize has to be done
-with resize2fs either online, or offline. It can be
-used only with conjunction with remount.
-.TP
-.BR block_validity / noblock_validity
-This options allows to enables/disables the in-kernel facility for tracking
-filesystem metadata blocks within internal data structures. This allows multi-
-block allocator and other routines to quickly locate extents which might
-overlap with filesystem metadata blocks. This option is intended for debugging
-purposes and since it negatively affects the performance, it is off by default.
-.TP
-.BR dioread_lock / dioread_nolock
-Controls whether or not ext4 should use the DIO read locking. If the
-dioread_nolock option is specified ext4 will allocate uninitialized extent
-before buffer write and convert the extent to initialized after IO completes.
-This approach allows ext4 code to avoid using inode mutex, which improves
-scalability on high speed storages. However this does not work with data
-journaling and dioread_nolock option will be ignored with kernel warning.
-Note that dioread_nolock code path is only used for extent-based files.
-Because of the restrictions this options comprises it is off by default
-(e.g. dioread_lock).
-.TP
-.BR i_version
-Enable 64-bit inode version support. This option is off by default.
-
-.SH "Mount options for fat"
-(Note:
-.I fat
-is not a separate filesystem, but a common part of the
-.IR msdos ,
-.I umsdos
-and
-.I vfat
-filesystems.)
-.TP
-.BR blocksize= { 512 | 1024 | 2048 }
-Set blocksize (default 512). This option is obsolete.
-.TP
-\fBuid=\fP\fIvalue\fP and \fBgid=\fP\fIvalue\fP
-Set the owner and group of all files.
-(Default: the uid and gid of the current process.)
-.TP
-.BI umask= value
-Set the umask (the bitmask of the permissions that are
-.B not
-present). The default is the umask of the current process.
-The value is given in octal.
-.TP
-.BI dmask= value
-Set the umask applied to directories only.
-The default is the umask of the current process.
-The value is given in octal.
-.\" Present since Linux 2.5.43.
-.TP
-.BI fmask= value
-Set the umask applied to regular files only.
-The default is the umask of the current process.
-The value is given in octal.
-.\" Present since Linux 2.5.43.
-.TP
-.BI allow_utime= value
-This option controls the permission check of mtime/atime.
-.RS
-.TP
-.B 20
-If current process is in group of file's group ID, you can change timestamp.
-.TP
-.B 2
-Other users can change timestamp.
-.PP
-The default is set from `dmask' option. (If the directory is writable,
-.BR utime (2)
-is also allowed. I.e. ~dmask & 022)
-
-Normally
-.BR utime (2)
-checks current process is owner of the file, or it has
-CAP_FOWNER capability. But FAT filesystem doesn't have uid/gid on disk, so
-normal check is too inflexible. With this option you can relax it.
-.RE
-.TP
-.BI check= value
-Three different levels of pickyness can be chosen:
-.RS
-.TP
-.BR r [ elaxed ]
-Upper and lower case are accepted and equivalent, long name parts are
-truncated (e.g.
-.I verylongname.foobar
-becomes
-.IR verylong.foo ),
-leading and embedded spaces are accepted in each name part (name and extension).
-.TP
-.BR n [ ormal ]
-Like "relaxed", but many special characters (*, ?, <, spaces, etc.) are
-rejected. This is the default.
-.TP
-.BR s [ trict ]
-Like "normal", but names may not contain long parts and special characters
-that are sometimes used on Linux, but are not accepted by MS-DOS are
-rejected. (+, =, spaces, etc.)
-.RE
-.TP
-.BI codepage= value
-Sets the codepage for converting to shortname characters on FAT
-and VFAT filesystems. By default, codepage 437 is used.
-.TP
-.BR conv= {b [ inary ]| t [ ext ]| a [ uto ]}
-The
-.I fat
-filesystem can perform CRLF<-->NL (MS-DOS text format to UNIX text
-format) conversion in the kernel. The following conversion modes are
-available:
-.RS
-.TP
-.B binary
-no translation is performed. This is the default.
-.TP
-.B text
-CRLF<-->NL translation is performed on all files.
-.TP
-.B auto
-CRLF<-->NL translation is performed on all files that don't have a
-"well-known binary" extension. The list of known extensions can be found at
-the beginning of
-.I fs/fat/misc.c
-(as of 2.0, the list is: exe, com, bin, app, sys, drv, ovl, ovr, obj,
-lib, dll, pif, arc, zip, lha, lzh, zoo, tar, z, arj, tz, taz, tzp, tpz,
-gz, tgz, deb, gif, bmp, tif, gl, jpg, pcx, tfm, vf, gf, pk, pxl, dvi).
-.PP
-Programs that do computed lseeks won't like in-kernel text conversion.
-Several people have had their data ruined by this translation. Beware!
-
-For filesystems mounted in binary mode, a conversion tool
-(fromdos/todos) is available. This option is obsolete.
-.RE
-.TP
-.BI cvf_format= module
-Forces the driver to use the CVF (Compressed Volume File) module
-.RI cvf_ module
-instead of auto-detection. If the kernel supports kmod, the
-cvf_format=xxx option also controls on-demand CVF module loading.
-This option is obsolete.
-.TP
-.BI cvf_option= option
-Option passed to the CVF module. This option is obsolete.
-.TP
-.B debug
-Turn on the
-.I debug
-flag. A version string and a list of filesystem parameters will be
-printed (these data are also printed if the parameters appear to be
-inconsistent).
-.TP
-.BR fat= {12 | 16 | 32 }
-Specify a 12, 16 or 32 bit fat. This overrides
-the automatic FAT type detection routine. Use with caution!
-.TP
-.BI iocharset= value
-Character set to use for converting between 8 bit characters
-and 16 bit Unicode characters. The default is iso8859-1.
-Long filenames are stored on disk in Unicode format.
-.TP
-.BI tz=UTC
-This option disables the conversion of timestamps
-between local time (as used by Windows on FAT) and UTC
-(which Linux uses internally). This is particularly
-useful when mounting devices (like digital cameras)
-that are set to UTC in order to avoid the pitfalls of
-local time.
-.TP
-.B quiet
-Turn on the
-.I quiet
-flag. Attempts to chown or chmod files do not return errors,
-although they fail. Use with caution!
-.TP
-.B showexec
-If set, the execute permission bits of the file will be allowed only if
-the extension part of the name is .EXE, .COM, or .BAT. Not set by default.
-.TP
-.B sys_immutable
-If set, ATTR_SYS attribute on FAT is handled as IMMUTABLE flag on Linux.
-Not set by default.
-.TP
-.B flush
-If set, the filesystem will try to flush to disk more early than normal.
-Not set by default.
-.TP
-.B usefree
-Use the "free clusters" value stored on FSINFO. It'll
-be used to determine number of free clusters without
-scanning disk. But it's not used by default, because
-recent Windows don't update it correctly in some
-case. If you are sure the "free clusters" on FSINFO is
-correct, by this option you can avoid scanning disk.
-.TP
-.BR dots ", " nodots ", " dotsOK= [ yes | no ]
-Various misguided attempts to force Unix or DOS conventions
-onto a FAT filesystem.
-
-.SH "Mount options for hfs"
-.TP
-.BI creator= cccc ", type=" cccc
-Set the creator/type values as shown by the MacOS finder
-used for creating new files. Default values: '????'.
-.TP
-.BI uid= n ", gid=" n
-Set the owner and group of all files.
-(Default: the uid and gid of the current process.)
-.TP
-.BI dir_umask= n ", file_umask=" n ", umask=" n
-Set the umask used for all directories, all regular files, or all
-files and directories. Defaults to the umask of the current process.
-.TP
-.BI session= n
-Select the CDROM session to mount.
-Defaults to leaving that decision to the CDROM driver.
-This option will fail with anything but a CDROM as underlying device.
-.TP
-.BI part= n
-Select partition number n from the device.
-Only makes sense for CDROMs.
-Defaults to not parsing the partition table at all.
-.TP
-.B quiet
-Don't complain about invalid mount options.
-
-.SH "Mount options for hpfs"
-.TP
-\fBuid=\fP\fIvalue\fP and \fBgid=\fP\fIvalue\fP
-Set the owner and group of all files. (Default: the uid and gid
-of the current process.)
-.TP
-.BI umask= value
-Set the umask (the bitmask of the permissions that are
-.B not
-present). The default is the umask of the current process.
-The value is given in octal.
-.TP
-.BR case= { lower | asis }
-Convert all files names to lower case, or leave them.
-(Default:
-.BR case=lower .)
-.TP
-.BR conv= { binary | text | auto }
-For
-.BR conv=text ,
-delete some random CRs (in particular, all followed by NL)
-when reading a file.
-For
-.BR conv=auto ,
-choose more or less at random between
-.BR conv=binary " and " conv=text .
-For
-.BR conv=binary ,
-just read what is in the file. This is the default.
-.TP
-.B nocheck
-Do not abort mounting when certain consistency checks fail.
-
-.SH "Mount options for iso9660"
-ISO 9660 is a standard describing a filesystem structure to be used
-on CD-ROMs. (This filesystem type is also seen on some DVDs. See also the
-.I udf
-filesystem.)
-
-Normal
-.I iso9660
-filenames appear in a 8.3 format (i.e., DOS-like restrictions on filename
-length), and in addition all characters are in upper case. Also there is
-no field for file ownership, protection, number of links, provision for
-block/character devices, etc.
-
-Rock Ridge is an extension to iso9660 that provides all of these UNIX-like
-features. Basically there are extensions to each directory record that
-supply all of the additional information, and when Rock Ridge is in use,
-the filesystem is indistinguishable from a normal UNIX filesystem (except
-that it is read-only, of course).
-.TP
-.B norock
-Disable the use of Rock Ridge extensions, even if available. Cf.\&
-.BR map .
-.TP
-.B nojoliet
-Disable the use of Microsoft Joliet extensions, even if available. Cf.\&
-.BR map .
-.TP
-.BR check= { r [ elaxed ]| s [ trict ]}
-With
-.BR check=relaxed ,
-a filename is first converted to lower case before doing the lookup.
-This is probably only meaningful together with
-.B norock
-and
-.BR map=normal .
-(Default:
-.BR check=strict .)
-.TP
-\fBuid=\fP\fIvalue\fP and \fBgid=\fP\fIvalue\fP
-Give all files in the filesystem the indicated user or group id,
-possibly overriding the information found in the Rock Ridge extensions.
-(Default:
-.BR uid=0,gid=0 .)
-.TP
-.BR map= { n [ ormal ]| o [ ff ]| a [ corn ]}
-For non-Rock Ridge volumes, normal name translation maps upper
-to lower case ASCII, drops a trailing `;1', and converts `;' to `.'.
-With
-.B map=off
-no name translation is done. See
-.BR norock .
-(Default:
-.BR map=normal .)
-.B map=acorn
-is like
-.BR map=normal
-but also apply Acorn extensions if present.
-.TP
-.BI mode= value
-For non-Rock Ridge volumes, give all files the indicated mode.
-(Default: read permission for everybody.)
-Since Linux 2.1.37 one no longer needs to specify the mode in
-decimal. (Octal is indicated by a leading 0.)
-.TP
-.B unhide
-Also show hidden and associated files.
-(If the ordinary files and the associated or hidden files have
-the same filenames, this may make the ordinary files inaccessible.)
-.TP
-.BR block= { 512 | 1024 | 2048 }
-Set the block size to the indicated value.
-(Default:
-.BR block=1024 .)
-.TP
-.BR conv= { a [ uto ]| b [ inary ]| m [ text ]| t [ ext ]}
-(Default:
-.BR conv=binary .)
-Since Linux 1.3.54 this option has no effect anymore.
-(And non-binary settings used to be very dangerous,
-possibly leading to silent data corruption.)
-.TP
-.B cruft
-If the high byte of the file length contains other garbage,
-set this mount option to ignore the high order bits of the file length.
-This implies that a file cannot be larger than 16MB.
-.TP
-.BI session= x
-Select number of session on multisession CD. (Since 2.3.4.)
-.TP
-.BI sbsector= xxx
-Session begins from sector xxx. (Since 2.3.4.)
-.LP
-The following options are the same as for vfat and specifying them only makes
-sense when using discs encoded using Microsoft's Joliet extensions.
-.TP
-.BI iocharset= value
-Character set to use for converting 16 bit Unicode characters on CD
-to 8 bit characters. The default is iso8859-1.
-.TP
-.B utf8
-Convert 16 bit Unicode characters on CD to UTF-8.
-
-.SH "Mount options for jfs"
-.TP
-.BI iocharset= name
-Character set to use for converting from Unicode to ASCII. The default is
-to do no conversion. Use
-.B iocharset=utf8
-for UTF8 translations. This requires CONFIG_NLS_UTF8 to be set in
-the kernel
-.I ".config"
-file.
-.TP
-.BI resize= value
-Resize the volume to
-.I value
-blocks. JFS only supports growing a volume, not shrinking it. This option
-is only valid during a remount, when the volume is mounted read-write. The
-.B resize
-keyword with no value will grow the volume to the full size of the partition.
-.TP
-.B nointegrity
-Do not write to the journal. The primary use of this option is to allow
-for higher performance when restoring a volume from backup media. The
-integrity of the volume is not guaranteed if the system abnormally ends.
-.TP
-.B integrity
-Default. Commit metadata changes to the journal. Use this option to remount
-a volume where the
-.B nointegrity
-option was previously specified in order to restore normal behavior.
-.TP
-.BR errors= { continue | remount-ro | panic }
-Define the behaviour when an error is encountered.
-(Either ignore errors and just mark the filesystem erroneous and continue,
-or remount the filesystem read-only, or panic and halt the system.)
-.TP
-.BR noquota | quota | usrquota | grpquota
-These options are accepted but ignored.
-
-.SH "Mount options for minix"
-None.
-
-.SH "Mount options for msdos"
-See mount options for fat.
-If the
-.I msdos
-filesystem detects an inconsistency, it reports an error and sets the file
-system read-only. The filesystem can be made writable again by remounting
-it.
-
-.SH "Mount options for ncpfs"
-Just like
-.IR nfs ", the " ncpfs
-implementation expects a binary argument (a
-.IR "struct ncp_mount_data" )
-to the mount system call. This argument is constructed by
-.BR ncpmount (8)
-and the current version of
-.B mount
-(2.12) does not know anything about ncpfs.
-
-.SH "Mount options for nfs and nfs4"
-See the options section of the
-.BR nfs (5)
-man page (nfs-utils package must be installed).
-
-The
-.IR nfs " and " nfs4
-implementation expects a binary argument (a
-.IR "struct nfs_mount_data" )
-to the mount system call. This argument is constructed by
-.BR mount.nfs (8)
-and the current version of
-.B mount
-(2.13) does not know anything about nfs and nfs4.
-
-.SH "Mount options for ntfs"
-.TP
-.BI iocharset= name
-Character set to use when returning file names.
-Unlike VFAT, NTFS suppresses names that contain
-nonconvertible characters. Deprecated.
-.\" since 2.5.11
-.TP
-.BI nls= name
-New name for the option earlier called
-.IR iocharset .
-.\" since 2.5.11
-.TP
-.BR utf8
-Use UTF-8 for converting file names.
-.TP
-.BR uni_xlate= { 0 | 1 | 2 }
-For 0 (or `no' or `false'), do not use escape sequences
-for unknown Unicode characters.
-For 1 (or `yes' or `true') or 2, use vfat-style 4-byte escape sequences
-starting with ":". Here 2 give a little-endian encoding
-and 1 a byteswapped bigendian encoding.
-.TP
-.B posix=[0|1]
-If enabled (posix=1), the filesystem distinguishes between
-upper and lower case. The 8.3 alias names are presented as
-hard links instead of being suppressed. This option is obsolete.
-.TP
-\fBuid=\fP\fIvalue\fP, \fBgid=\fP\fIvalue\fP and \fBumask=\fP\fIvalue\fP
-Set the file permission on the filesystem.
-The umask value is given in octal.
-By default, the files are owned by root and not readable by somebody else.
-
-.SH "Mount options for proc"
-.TP
-\fBuid=\fP\fIvalue\fP and \fBgid=\fP\fIvalue\fP
-These options are recognized, but have no effect as far as I can see.
-
-.SH "Mount options for ramfs"
-Ramfs is a memory based filesystem. Mount it and you have it. Unmount it
-and it is gone. Present since Linux 2.3.99pre4.
-There are no mount options.
-
-.SH "Mount options for reiserfs"
-Reiserfs is a journaling filesystem.
-.TP
-.BR conv
-Instructs version 3.6 reiserfs software to mount a version 3.5 filesystem,
-using the 3.6 format for newly created objects. This filesystem will no
-longer be compatible with reiserfs 3.5 tools.
-.TP
-.BR hash= { rupasov | tea | r5 | detect }
-Choose which hash function reiserfs will use to find files within directories.
-.RS
-.TP
-.B rupasov
-A hash invented by Yury Yu. Rupasov. It is fast and preserves locality,
-mapping lexicographically close file names to close hash values.
-This option should not be used, as it causes a high probability of hash
-collisions.
-.TP
-.B tea
-A Davis-Meyer function implemented by Jeremy Fitzhardinge.
-It uses hash permuting bits in the name. It gets high randomness
-and, therefore, low probability of hash collisions at some CPU cost.
-This may be used if EHASHCOLLISION errors are experienced with the r5 hash.
-.TP
-.B r5
-A modified version of the rupasov hash. It is used by default and is
-the best choice unless the filesystem has huge directories and
-unusual file-name patterns.
-.TP
-.B detect
-Instructs
-.IR mount
-to detect which hash function is in use by examining
-the filesystem being mounted, and to write this information into
-the reiserfs superblock. This is only useful on the first mount of
-an old format filesystem.
-.RE
-.TP
-.BR hashed_relocation
-Tunes the block allocator. This may provide performance improvements
-in some situations.
-.TP
-.BR no_unhashed_relocation
-Tunes the block allocator. This may provide performance improvements
-in some situations.
-.TP
-.BR noborder
-Disable the border allocator algorithm invented by Yury Yu. Rupasov.
-This may provide performance improvements in some situations.
-.TP
-.BR nolog
-Disable journaling. This will provide slight performance improvements in
-some situations at the cost of losing reiserfs's fast recovery from crashes.
-Even with this option turned on, reiserfs still performs all journaling
-operations, save for actual writes into its journaling area. Implementation
-of
-.IR nolog
-is a work in progress.
-.TP
-.BR notail
-By default, reiserfs stores small files and `file tails' directly into its
-tree. This confuses some utilities such as
-.BR LILO (8).
-This option is used to disable packing of files into the tree.
-.TP
-.BR replayonly
-Replay the transactions which are in the journal, but do not actually
-mount the filesystem. Mainly used by
-.IR reiserfsck .
-.TP
-.BI resize= number
-A remount option which permits online expansion of reiserfs partitions.
-Instructs reiserfs to assume that the device has
-.I number
-blocks.
-This option is designed for use with devices which are under logical
-volume management (LVM).
-There is a special
-.I resizer
-utility which can be obtained from
-.IR ftp://ftp.namesys.com/pub/reiserfsprogs .
-.TP
-.BR user_xattr
-Enable Extended User Attributes. See the
-.BR attr (5)
-manual page.
-.TP
-.BR acl
-Enable POSIX Access Control Lists. See the
-.BR acl (5)
-manual page.
-.TP
-.BR barrier=none " / " barrier=flush "
-This enables/disables the use of write barriers in the journaling code.
-barrier=none disables it, barrier=flush enables it. Write barriers enforce
-proper on-disk ordering of journal commits, making volatile disk write caches
-safe to use, at some performance penalty. The reiserfs filesystem does not
-enable write barriers by default. Be sure to enable barriers unless your disks
-are battery-backed one way or another. Otherwise you risk filesystem
-corruption in case of power failure.
-
-.SH "Mount options for romfs"
-None.
-
-.SH "Mount options for squashfs"
-None.
-
-.SH "Mount options for smbfs"
-Just like
-.IR nfs ", the " smbfs
-implementation expects a binary argument (a
-.IR "struct smb_mount_data" )
-to the mount system call. This argument is constructed by
-.BR smbmount (8)
-and the current version of
-.B mount
-(2.12) does not know anything about smbfs.
-
-.SH "Mount options for sysv"
-None.
-
-.SH "Mount options for tmpfs"
-.TP
-.BI size= nbytes
-Override default maximum size of the filesystem.
-The size is given in bytes, and rounded up to entire pages.
-The default is half of the memory. The size parameter also accepts a suffix %
-to limit this tmpfs instance to that percentage of your physical RAM:
-the default, when neither size nor nr_blocks is specified, is size=50%
-.TP
-.B nr_blocks=
-The same as size, but in blocks of PAGE_CACHE_SIZE
-.TP
-.B nr_inodes=
-The maximum number of inodes for this instance. The default
-is half of the number of your physical RAM pages, or (on a
-machine with highmem) the number of lowmem RAM pages,
-whichever is the lower.
-.PP
-The tmpfs mount options for sizing (
-.BR size ,
-.BR nr_blocks ,
-and
-.BR nr_inodes )
-accept a suffix
-.BR k ,
-.B m
-or
-.B g
-for Ki, Mi, Gi (binary kilo, mega and giga) and can be changed on remount.
-
-.TP
-.B mode=
-Set initial permissions of the root directory.
-.TP
-.B uid=
-The user id.
-.TP
-.B gid=
-The group id.
-.TP
-.B mpol=[default|prefer:Node|bind:NodeList|interleave|interleave:NodeList]
-Set the NUMA memory allocation policy for all files in that
-instance (if the kernel CONFIG_NUMA is enabled) - which can be adjusted on the
-fly via 'mount -o remount ...'
-.RS
-.TP
-.B default
-prefers to allocate memory from the local node
-.TP
-.B prefer:Node
-prefers to allocate memory from the given Node
-.TP
-.B bind:NodeList
-allocates memory only from nodes in NodeList
-.TP
-.B interleave
-prefers to allocate from each node in turn
-.TP
-.B interleave:NodeList
-allocates from each node of NodeList in turn.
-.PP
-The NodeList format is a comma-separated list of decimal numbers and ranges, a
-range being two hyphen-separated decimal numbers, the smallest and largest node
-numbers in the range. For example, mpol=bind:0-3,5,7,9-15
-
-Note that trying to mount a tmpfs with an mpol option will fail if the
-running kernel does not support NUMA; and will fail if its nodelist
-specifies a node which is not online. If your system relies on that
-tmpfs being mounted, but from time to time runs a kernel built without
-NUMA capability (perhaps a safe recovery kernel), or with fewer nodes
-online, then it is advisable to omit the mpol option from automatic
-mount options. It can be added later, when the tmpfs is already mounted
-on MountPoint, by 'mount -o remount,mpol=Policy:NodeList MountPoint'.
-
-.SH "Mount options for ubifs"
-UBIFS is a flash file system which works on top of UBI volumes. Note that
-.B
-atime
-is not supported and is always turned off.
-.TP
-The device name may be specified as
-.RS
-.B ubiX_Y
-UBI device number
-.BR X ,
-volume number
-.B Y
-.TP
-.B ubiY
-UBI device number
-.BR 0 ,
-volume number
-.B Y
-.TP
-.B ubiX:NAME
-UBI device number
-.BR X ,
-volume with name
-.B NAME
-.TP
-.B ubi:NAME
-UBI device number
-.BR 0 ,
-volume with name
-.B NAME
-.RE
-Alternative
-.B !
-separator may be used instead of
-.BR : .
-.TP
-The following mount options are available:
-.TP
-.BR bulk_read
-Enable bulk-read. VFS read-ahead is disabled because it slows down the file
-system. Bulk-Read is an internal optimization. Some flashes may read faster if
-the data are read at one go, rather than at several read requests. For
-example, OneNAND can do "read-while-load" if it reads more than one NAND page.
-.TP
-.BR no_bulk_read
-Do not bulk-read. This is the default.
-.TP
-.BR chk_data_crc
-Check data CRC-32 checksums. This is the default.
-.TP
-.BR no_chk_data_crc.
-Do not check data CRC-32 checksums. With this option, the filesystem does not
-check CRC-32 checksum for data, but it does check it for the internal indexing
-information. This option only affects reading, not writing. CRC-32 is always
-calculated when writing the data.
-.TP
-.BR compr= { none | lzo | zlib }
-Select the default compressor which is used when new files are written. It is
-still possible to read compressed files if mounted with the
-.B none
-option.
-
-.SH "Mount options for udf"
-udf is the "Universal Disk Format" filesystem defined by the Optical
-Storage Technology Association, and is often used for DVD-ROM.
-See also
-.IR iso9660 .
-.TP
-.B gid=
-Set the default group.
-.TP
-.B umask=
-Set the default umask.
-The value is given in octal.
-.TP
-.B uid=
-Set the default user.
-.TP
-.B unhide
-Show otherwise hidden files.
-.TP
-.B undelete
-Show deleted files in lists.
-.TP
-.B nostrict
-Unset strict conformance.
-.\" .TP
-.\" .B utf8
-.\" (unused).
-.TP
-.B iocharset
-Set the NLS character set.
-.TP
-.B bs=
-Set the block size. (May not work unless 2048.)
-.TP
-.B novrs
-Skip volume sequence recognition.
-.TP
-.B session=
-Set the CDROM session counting from 0. Default: last session.
-.TP
-.B anchor=
-Override standard anchor location. Default: 256.
-.TP
-.B volume=
-Override the VolumeDesc location. (unused)
-.TP
-.B partition=
-Override the PartitionDesc location. (unused)
-.TP
-.B lastblock=
-Set the last block of the filesystem.
-.TP
-.B fileset=
-Override the fileset block location. (unused)
-.TP
-.B rootdir=
-Override the root directory location. (unused)
-
-.SH "Mount options for ufs"
-.TP
-.BI ufstype= value
-UFS is a filesystem widely used in different operating systems.
-The problem are differences among implementations. Features of some
-implementations are undocumented, so its hard to recognize the
-type of ufs automatically.
-That's why the user must specify the type of ufs by mount option.
-Possible values are:
-.RS
-.TP
-.B old
-Old format of ufs, this is the default, read only.
-(Don't forget to give the \-r option.)
-.TP
-.B 44bsd
-For filesystems created by a BSD-like system (NetBSD,FreeBSD,OpenBSD).
-.TP
-.B ufs2
-Used in FreeBSD 5.x supported as read-write.
-.TP
-.B 5xbsd
-Synonym for ufs2.
-.TP
-.B sun
-For filesystems created by SunOS or Solaris on Sparc.
-.TP
-.B sunx86
-For filesystems created by Solaris on x86.
-.TP
-.B hp
-For filesystems created by HP-UX, read-only.
-.TP
-.B nextstep
-For filesystems created by NeXTStep (on NeXT station) (currently read only).
-.TP
-.B nextstep-cd
-For NextStep CDROMs (block_size == 2048), read-only.
-.TP
-.B openstep
-For filesystems created by OpenStep (currently read only).
-The same filesystem type is also used by Mac OS X.
-.RE
-
-.TP
-.BI onerror= value
-Set behaviour on error:
-.RS
-.TP
-.B panic
-If an error is encountered, cause a kernel panic.
-.TP
-.RB [ lock | umount | repair ]
-These mount options don't do anything at present;
-when an error is encountered only a console message is printed.
-.RE
-
-.SH "Mount options for umsdos"
-See mount options for msdos.
-The
-.B dotsOK
-option is explicitly killed by
-.IR umsdos .
-
-.SH "Mount options for vfat"
-First of all, the mount options for
-.I fat
-are recognized.
-The
-.B dotsOK
-option is explicitly killed by
-.IR vfat .
-Furthermore, there are
-.TP
-.B uni_xlate
-Translate unhandled Unicode characters to special escaped sequences.
-This lets you backup and restore filenames that are created with any
-Unicode characters. Without this option, a '?' is used when no
-translation is possible. The escape character is ':' because it is
-otherwise illegal on the vfat filesystem. The escape sequence
-that gets used, where u is the unicode character,
-is: ':', (u & 0x3f), ((u>>6) & 0x3f), (u>>12).
-.TP
-.B posix
-Allow two files with names that only differ in case.
-This option is obsolete.
-.TP
-.B nonumtail
-First try to make a short name without sequence number,
-before trying
-.IR name~num.ext .
-.TP
-.B utf8
-UTF8 is the filesystem safe 8-bit encoding of Unicode that is used by the
-console. It can be enabled for the filesystem with this option or disabled
-with utf8=0, utf8=no or utf8=false. If `uni_xlate' gets set, UTF8 gets
-disabled.
-.TP
-.BR shortname= { lower | win95 | winnt | mixed }
-
-Defines the behaviour for creation and display of filenames which fit into
-8.3 characters. If a long name for a file exists, it will always be
-preferred display. There are four modes:
-:
-.RS
-.TP
-.I lower
-Force the short name to lower case upon display; store a long name when
-the short name is not all upper case.
-.TP
-.I win95
-Force the short name to upper case upon display; store a long name when
-the short name is not all upper case.
-.TP
-.I winnt
-Display the shortname as is; store a long name when the short name is
-not all lower case or all upper case.
-.TP
-.I mixed
-Display the short name as is; store a long name when the short name is not
-all upper case. This mode is the default since Linux 2.6.32.
-.RE
-
-
-.SH "Mount options for usbfs"
-.TP
-\fBdevuid=\fP\fIuid\fP and \fBdevgid=\fP\fIgid\fP and \fBdevmode=\fP\fImode\fP
-Set the owner and group and mode of the device files in the usbfs filesystem
-(default: uid=gid=0, mode=0644). The mode is given in octal.
-.TP
-\fBbusuid=\fP\fIuid\fP and \fBbusgid=\fP\fIgid\fP and \fBbusmode=\fP\fImode\fP
-Set the owner and group and mode of the bus directories in the usbfs
-filesystem (default: uid=gid=0, mode=0555). The mode is given in octal.
-.TP
-\fBlistuid=\fP\fIuid\fP and \fBlistgid=\fP\fIgid\fP and \fBlistmode=\fP\fImode\fP
-Set the owner and group and mode of the file
-.I devices
-(default: uid=gid=0, mode=0444). The mode is given in octal.
-
-.SH "Mount options for xenix"
-None.
-
-.SH "Mount options for xfs"
-.TP
-.BI allocsize= size
-Sets the buffered I/O end-of-file preallocation size when
-doing delayed allocation writeout (default size is 64KiB).
-Valid values for this option are page size (typically 4KiB)
-through to 1GiB, inclusive, in power-of-2 increments.
-.TP
-.BR attr2 | noattr2
-The options enable/disable (default is enabled) an "opportunistic"
-improvement to be made in the way inline extended attributes are
-stored on-disk.
-When the new form is used for the first time (by setting or
-removing extended attributes) the on-disk superblock feature
-bit field will be updated to reflect this format being in use.
-.TP
-.B barrier
-Enables the use of block layer write barriers for writes into
-the journal and unwritten extent conversion. This allows for
-drive level write caching to be enabled, for devices that
-support write barriers.
-.TP
-.B dmapi
-Enable the DMAPI (Data Management API) event callouts.
-Use with the
-.B mtpt
-option.
-.TP
-.BR grpid | bsdgroups " and " nogrpid | sysvgroups
-These options define what group ID a newly created file gets.
-When grpid is set, it takes the group ID of the directory in
-which it is created; otherwise (the default) it takes the fsgid
-of the current process, unless the directory has the setgid bit
-set, in which case it takes the gid from the parent directory,
-and also gets the setgid bit set if it is a directory itself.
-.TP
-.BI ihashsize= value
-Sets the number of hash buckets available for hashing the
-in-memory inodes of the specified mount point. If a value
-of zero is used, the value selected by the default algorithm
-will be displayed in
-.IR /proc/mounts .
-.TP
-.BR ikeep | noikeep
-When inode clusters are emptied of inodes, keep them around
-on the disk (ikeep) - this is the traditional XFS behaviour
-and is still the default for now. Using the noikeep option,
-inode clusters are returned to the free space pool.
-.TP
-.B inode64
-Indicates that XFS is allowed to create inodes at any location
-in the filesystem, including those which will result in inode
-numbers occupying more than 32 bits of significance. This is
-provided for backwards compatibility, but causes problems for
-backup applications that cannot handle large inode numbers.
-.TP
-.BR largeio | nolargeio
-If
-.B nolargeio
-is specified, the optimal I/O reported in
-st_blksize by
-.BR stat (2)
-will be as small as possible to allow user
-applications to avoid inefficient read/modify/write I/O.
-If
-.B largeio
-is specified, a filesystem that has a
-.B swidth
-specified
-will return the
-.B swidth
-value (in bytes) in st_blksize. If the
-filesystem does not have a
-.B swidth
-specified but does specify
-an
-.B allocsize
-then
-.B allocsize
-(in bytes) will be returned
-instead.
-If neither of these two options are specified, then filesystem
-will behave as if
-.B nolargeio
-was specified.
-.TP
-.BI logbufs= value
-Set the number of in-memory log buffers. Valid numbers range
-from 2-8 inclusive.
-The default value is 8 buffers for any recent kernel.
-.TP
-.BI logbsize= value
-Set the size of each in-memory log buffer.
-Size may be specified in bytes, or in kilobytes with a "k" suffix.
-Valid sizes for version 1 and version 2 logs are 16384 (16k) and
-32768 (32k). Valid sizes for version 2 logs also include
-65536 (64k), 131072 (128k) and 262144 (256k).
-The default value for any recent kernel is 32768.
-.TP
-\fBlogdev=\fP\fIdevice\fP and \fBrtdev=\fP\fIdevice\fP
-Use an external log (metadata journal) and/or real-time device.
-An XFS filesystem has up to three parts: a data section, a log section,
-and a real-time section.
-The real-time section is optional, and the log section can be separate
-from the data section or contained within it.
-Refer to
-.BR xfs (5).
-.TP
-.BI mtpt= mountpoint
-Use with the
-.B dmapi
-option. The value specified here will be
-included in the DMAPI mount event, and should be the path of
-the actual mountpoint that is used.
-.TP
-.B noalign
-Data allocations will not be aligned at stripe unit boundaries.
-.TP
-.B noatime
-Access timestamps are not updated when a file is read.
-.TP
-.B norecovery
-The filesystem will be mounted without running log recovery.
-If the filesystem was not cleanly unmounted, it is likely to
-be inconsistent when mounted in
-.B norecovery
-mode.
-Some files or directories may not be accessible because of this.
-Filesystems mounted
-.B norecovery
-must be mounted read-only or the mount will fail.
-.TP
-.B nouuid
-Don't check for double mounted filesystems using the filesystem uuid.
-This is useful to mount LVM snapshot volumes.
-.TP
-.B osyncisosync
-Make O_SYNC writes implement true O_SYNC. WITHOUT this option,
-Linux XFS behaves as if an
-.B osyncisdsync
-option is used,
-which will make writes to files opened with the O_SYNC flag set
-behave as if the O_DSYNC flag had been used instead.
-This can result in better performance without compromising
-data safety.
-However if this option is not in effect, timestamp updates from
-O_SYNC writes can be lost if the system crashes.
-If timestamp updates are critical, use the
-.B osyncisosync
-option.
-.TP
-.BR uquota | usrquota | uqnoenforce | quota
-User disk quota accounting enabled, and limits (optionally)
-enforced. Refer to
-.BR xfs_quota (8)
-for further details.
-.TP
-.BR gquota | grpquota | gqnoenforce
-Group disk quota accounting enabled and limits (optionally)
-enforced. Refer to
-.BR xfs_quota (8)
-for further details.
-.TP
-.BR pquota | prjquota | pqnoenforce
-Project disk quota accounting enabled and limits (optionally)
-enforced. Refer to
-.BR xfs_quota (8)
-for further details.
-.TP
-\fBsunit=\fP\fIvalue\fP and \fBswidth=\fP\fIvalue\fP
-Used to specify the stripe unit and width for a RAID device or a stripe
-volume.
-.I value
-must be specified in 512-byte block units.
-If this option is not specified and the filesystem was made on a stripe
-volume or the stripe width or unit were specified for the RAID device at
-mkfs time, then the mount system call will restore the value from the
-superblock.
-For filesystems that are made directly on RAID devices, these options can be
-used to override the information in the superblock if the underlying disk
-layout changes after the filesystem has been created.
-The
-.B swidth
-option is required if the
-.B sunit
-option has been specified,
-and must be a multiple of the
-.B sunit
-value.
-.TP
-.B swalloc
-Data allocations will be rounded up to stripe width boundaries
-when the current end of file is being extended and the file
-size is larger than the stripe width size.
-
-.SH "Mount options for xiafs"
-None. Although nothing is wrong with xiafs, it is not used much,
-and is not maintained. Probably one shouldn't use it.
-Since Linux version 2.1.21 xiafs is no longer part of the kernel source.
-
-.SH "THE LOOP DEVICE"
-One further possible type is a mount via the loop device. For example,
-the command
-.RS
-.sp
-.B "mount /tmp/disk.img /mnt -t vfat -o loop=/dev/loop"
-.sp
-.RE
-will set up the loop device
-.I /dev/loop3
-to correspond to the file
-.IR /tmp/disk.img ,
-and then mount this device on
-.IR /mnt .
-
-If no explicit loop device is mentioned
-(but just an option `\fB\-o loop\fP' is given), then
-.B mount
-will try to find some unused loop device and use that, for example
-.RS
-.sp
-.B "mount /tmp/disk.img /mnt -o loop"
-.sp
-.RE
-The mount command
-.B automatically
-creates a loop device from a regular file if a filesystem type is
-not specified or the filesystem is known for libblkid, for example:
-.RS
-.sp
-.B "mount /tmp/disk.img /mnt"
-.sp
-.B "mount -t ext3 /tmp/disk.img /mnt"
-.sp
-.RE
-This type of mount knows about three options, namely
-.BR loop ", " offset ", " sizelimit " ,
-that are really options to
-.BR \%losetup (8).
-(These options can be used in addition to those specific
-to the filesystem type.)
-
-Since Linux 2.6.25 is supported auto-destruction of loop devices and
-then any loop device allocated by
-.B mount
-will be freed by
-.B umount
-independently on
-.IR /etc/mtab .
-
-You can also free a loop device by hand, using `losetup -d' or `umount -d`.
-
-.SH RETURN CODES
-.B mount
-has the following return codes (the bits can be ORed):
-.TP
-.BR 0
-success
-.TP
-.BR 1
-incorrect invocation or permissions
-.TP
-.BR 2
-system error (out of memory, cannot fork, no more loop devices)
-.TP
-.BR 4
-internal
-.B mount
-bug
-.TP
-.BR 8
-user interrupt
-.TP
-.BR 16
-problems writing or locking /etc/mtab
-.TP
-.BR 32
-mount failure
-.TP
-.BR 64
-some mount succeeded
-
-.SH NOTES
-The syntax of external mount helpers is:
-
-.RS
-.BI /sbin/mount. <suffix>
-.I spec dir
-.RB [ \-sfnv ]
-.RB [ \-o
-.IR options ]
-.RB [ \-t
-.IR type.subtype ]
-.RE
-
-where the <type> is filesystem type and \-sfnvo options have same meaning like
-standard mount options. The \-t option is used for filesystems with subtypes
-support (for example /sbin/mount.fuse -t fuse.sshfs).
-
-.SH FILES
-.TP 18n
-.I /etc/fstab
-filesystem table
-.TP
-.I /etc/mtab
-table of mounted filesystems
-.TP
-.I /etc/mtab~
-lock file
-.TP
-.I /etc/mtab.tmp
-temporary file
-.TP
-.I /etc/filesystems
-a list of filesystem types to try
-
-.SH "SEE ALSO"
-.BR mount (2),
-.BR umount (2),
-.BR fstab (5),
-.BR umount (8),
-.BR swapon (8),
-.BR nfs (5),
-.BR xfs (5),
-.BR e2label (8),
-.BR xfs_admin (8),
-.BR mountd (8),
-.BR nfsd (8),
-.BR mke2fs (8),
-.BR tune2fs (8),
-.BR losetup (8)
-.SH BUGS
-It is possible for a corrupted filesystem to cause a crash.
-.PP
-Some Linux filesystems don't support
-.B "\-o sync and \-o dirsync"
-(the ext2, ext3, fat and vfat filesystems
-.I do
-support synchronous updates (a la BSD) when mounted with the
-.B sync
-option).
-.PP
-The
-.B "\-o remount"
-may not be able to change mount parameters (all
-.IR ext2fs -specific
-parameters, except
-.BR sb ,
-are changeable with a remount, for example, but you can't change
-.B gid
-or
-.B umask
-for the
-.IR fatfs ).
-.PP
-Mount by label or uuid will work only if your devices have the names listed in
-.IR /proc/partitions .
-In particular, it may well fail if the kernel was compiled with devfs
-but devfs is not mounted.
-.PP
-It is possible that files
-.IR /etc/mtab
-and
-.IR /proc/mounts
-don't match. The first file is based only on the mount command options, but the
-content of the second file also depends on the kernel and others settings (e.g.
-remote NFS server. In particular case the mount command may reports unreliable
-information about a NFS mount point and the /proc/mounts file usually contains
-more reliable information.)
-.PP
-Checking files on NFS filesystem referenced by file descriptors (i.e. the
-.BR fcntl
-and
-.BR ioctl
-families of functions) may lead to inconsistent result due to the lack of
-consistency check in kernel even if noac is used.
-.SH HISTORY
-A
-.B mount
-command existed in Version 5 AT&T UNIX.
-.SH AVAILABILITY
-The mount command is part of the util-linux package and is available from
-ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
+++ /dev/null
-/*
- * A mount(8) for Linux.
- *
- * Modifications by many people. Distributed under GPL.
- */
-
-#include <unistd.h>
-#include <ctype.h>
-#include <errno.h>
-#include <string.h>
-#include <getopt.h>
-#include <stdio.h>
-
-#include <pwd.h>
-#include <grp.h>
-
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-#include <sys/mount.h>
-
-#include <mntent.h>
-
-#ifdef HAVE_LIBSELINUX
-#include <selinux/selinux.h>
-#include <selinux/context.h>
-#endif
-
-#include "pathnames.h"
-#include "fsprobe.h"
-#include "devname.h"
-#include "mount_constants.h"
-#include "sundries.h"
-#include "mount_mntent.h"
-#include "fstab.h"
-#include "loopdev.h"
-#include "linux_version.h"
-#include "getusername.h"
-#include "env.h"
-#include "nls.h"
-#include "blkdev.h"
-#include "strutils.h"
-#include "closestream.h"
-#include "xgetpass.h"
-
-#define DO_PS_FIDDLING
-
-#ifdef DO_PS_FIDDLING
-#include "setproctitle.h"
-#endif
-
-/* True for fake mount (-f). */
-static int fake = 0;
-
-/* True if we are allowed to call /sbin/mount.${FSTYPE} */
-static int external_allowed = 1;
-
-/* Don't write an entry in /etc/mtab (-n). */
-static int nomtab = 0;
-
-/* True for explicit readonly (-r). */
-static int readonly = 0;
-
-/* Nonzero for sloppy (-s). */
-static int sloppy = 0;
-
-/* True for explicit read/write (-w). */
-static int readwrite = 0;
-
-/* True for all mount (-a). */
-static int mount_all = 0;
-
-/* True for fork() during all mount (-F). */
-static int optfork = 0;
-
-/* Add volumelabel in a listing of mounted devices (-l). */
-static int list_with_volumelabel = 0;
-
-/* Nonzero for mount {bind|move|make-shared|make-private|
- * make-unbindable|make-slave}
- */
-static int mounttype = 0;
-
-/* True if (ruid != euid) or (0 != ruid), i.e. only "user" mounts permitted. */
-static int restricted = 1;
-
-/* mount(2) options */
-struct mountargs {
- const char *spec;
- const char *node;
- const char *type;
- int flags;
- void *data;
-};
-
-/* Map from -o and fstab option strings to the flag argument to mount(2). */
-struct opt_map {
- const char *opt; /* option name */
- int skip; /* skip in mtab option string */
- int inv; /* true if flag value should be inverted */
- int mask; /* flag mask value */
- int cmask; /* comments mask */
-};
-
-/* Custom mount options for our own purposes. */
-/* Maybe these should now be freed for kernel use again */
-#define MS_NOAUTO 0x80000000
-#define MS_USERS 0x40000000
-#define MS_USER 0x20000000
-#define MS_OWNER 0x10000000
-#define MS_GROUP 0x08000000
-#define MS_COMMENT 0x02000000
-#define MS_LOOP 0x00010000
-
-#define MS_COMMENT_NOFAIL (1 << 1)
-#define MS_COMMENT_NETDEV (1 << 2)
-
-/* Options that we keep the mount system call from seeing. */
-#define MS_NOSYS (MS_NOAUTO|MS_USERS|MS_USER|MS_COMMENT|MS_LOOP)
-
-/* Options that we keep from appearing in the options field in the mtab. */
-#define MS_NOMTAB (MS_REMOUNT|MS_NOAUTO|MS_USERS|MS_USER)
-
-#define MS_PROPAGATION (MS_SHARED|MS_SLAVE|MS_UNBINDABLE|MS_PRIVATE)
-
-/* Options that we make ordinary users have by default. */
-#define MS_SECURE (MS_NOEXEC|MS_NOSUID|MS_NODEV)
-
-/* Options that we make owner-mounted devices have by default */
-#define MS_OWNERSECURE (MS_NOSUID|MS_NODEV)
-
-static const struct opt_map opt_map[] = {
- { "defaults", 0, 0, 0 }, /* default options */
- { "ro", 1, 0, MS_RDONLY }, /* read-only */
- { "rw", 1, 1, MS_RDONLY }, /* read-write */
- { "exec", 0, 1, MS_NOEXEC }, /* permit execution of binaries */
- { "noexec", 0, 0, MS_NOEXEC }, /* don't execute binaries */
- { "suid", 0, 1, MS_NOSUID }, /* honor suid executables */
- { "nosuid", 0, 0, MS_NOSUID }, /* don't honor suid executables */
- { "dev", 0, 1, MS_NODEV }, /* interpret device files */
- { "nodev", 0, 0, MS_NODEV }, /* don't interpret devices */
- { "sync", 0, 0, MS_SYNCHRONOUS}, /* synchronous I/O */
- { "async", 0, 1, MS_SYNCHRONOUS}, /* asynchronous I/O */
- { "dirsync", 0, 0, MS_DIRSYNC}, /* synchronous directory modifications */
- { "remount", 0, 0, MS_REMOUNT}, /* Alter flags of mounted FS */
- { "bind", 0, 0, MS_BIND }, /* Remount part of tree elsewhere */
- { "rbind", 0, 0, MS_BIND|MS_REC }, /* Idem, plus mounted subtrees */
- { "auto", 0, 1, MS_NOAUTO }, /* Can be mounted using -a */
- { "noauto", 0, 0, MS_NOAUTO }, /* Can only be mounted explicitly */
- { "users", 0, 0, MS_USERS }, /* Allow ordinary user to mount */
- { "nousers", 0, 1, MS_USERS }, /* Forbid ordinary user to mount */
- { "user", 0, 0, MS_USER }, /* Allow ordinary user to mount */
- { "nouser", 0, 1, MS_USER }, /* Forbid ordinary user to mount */
- { "owner", 0, 0, MS_OWNER }, /* Let the owner of the device mount */
- { "noowner", 0, 1, MS_OWNER }, /* Device owner has no special privs */
- { "group", 0, 0, MS_GROUP }, /* Let the group of the device mount */
- { "nogroup", 0, 1, MS_GROUP }, /* Device group has no special privs */
- { "_netdev", 0, 0, MS_COMMENT, MS_COMMENT_NETDEV }, /* Device requires network */
- { "comment", 0, 0, MS_COMMENT}, /* fstab comment only (kudzu,_netdev)*/
-
- /* add new options here */
-#ifdef MS_NOSUB
- { "sub", 0, 1, MS_NOSUB }, /* allow submounts */
- { "nosub", 0, 0, MS_NOSUB }, /* don't allow submounts */
-#endif
-#ifdef MS_SILENT
- { "silent", 0, 0, MS_SILENT }, /* be quiet */
- { "loud", 0, 1, MS_SILENT }, /* print out messages. */
-#endif
-#ifdef MS_MANDLOCK
- { "mand", 0, 0, MS_MANDLOCK }, /* Allow mandatory locks on this FS */
- { "nomand", 0, 1, MS_MANDLOCK }, /* Forbid mandatory locks on this FS */
-#endif
- { "loop", 1, 0, MS_LOOP }, /* use a loop device */
-#ifdef MS_NOATIME
- { "atime", 0, 1, MS_NOATIME }, /* Update access time */
- { "noatime", 0, 0, MS_NOATIME }, /* Do not update access time */
-#endif
-#ifdef MS_I_VERSION
- { "iversion", 0, 0, MS_I_VERSION }, /* Update inode I_version time */
- { "noiversion", 0, 1, MS_I_VERSION }, /* Don't update inode I_version time */
-#endif
-#ifdef MS_NODIRATIME
- { "diratime", 0, 1, MS_NODIRATIME }, /* Update dir access times */
- { "nodiratime", 0, 0, MS_NODIRATIME },/* Do not update dir access times */
-#endif
-#ifdef MS_RELATIME
- { "relatime", 0, 0, MS_RELATIME }, /* Update access times relative to
- mtime/ctime */
- { "norelatime", 0, 1, MS_RELATIME }, /* Update access time without regard
- to mtime/ctime */
-#endif
-#ifdef MS_STRICTATIME
- { "strictatime", 0, 0, MS_STRICTATIME }, /* Strict atime semantics */
- { "nostrictatime", 0, 1, MS_STRICTATIME }, /* kernel default atime */
-#endif
- { "nofail", 0, 0, MS_COMMENT, MS_COMMENT_NOFAIL }, /* Do not fail if ENOENT on dev */
- { NULL, 0, 0, 0 }
-};
-
-static int opt_nofail;
-static int invuser_flags;
-static int comment_flags;
-
-static const char *opt_loopdev, *opt_vfstype, *opt_offset, *opt_sizelimit,
- *opt_encryption, *opt_speed, *opt_comment, *opt_uhelper, *opt_helper;
-
-static int is_readonly(const char *node);
-static int mounted (const char *spec0, const char *node0, struct mntentchn *fstab_mc);
-static int check_special_mountprog(const char *spec, const char *node,
- const char *type, int flags, char *extra_opts, int *status);
-
-static struct string_opt_map {
- char *tag;
- int skip;
- const char **valptr;
-} string_opt_map[] = {
- { "loop=", 0, &opt_loopdev },
- { "vfs=", 1, &opt_vfstype },
- { "offset=", 0, &opt_offset },
- { "sizelimit=", 0, &opt_sizelimit },
- { "encryption=", 0, &opt_encryption },
- { "speed=", 0, &opt_speed },
- { "comment=", 1, &opt_comment },
- { "uhelper=", 0, &opt_uhelper },
- { "helper=", 0, &opt_helper },
- { NULL, 0, NULL }
-};
-
-static void
-clear_string_opts(void) {
- struct string_opt_map *m;
-
- for (m = &string_opt_map[0]; m->tag; m++)
- *(m->valptr) = NULL;
-}
-
-static void
-clear_flags_opts(void) {
- invuser_flags = 0;
- comment_flags = 0;
- opt_nofail = 0;
-}
-
-static int
-parse_string_opt(char *s) {
- struct string_opt_map *m;
- int lth;
-
- for (m = &string_opt_map[0]; m->tag; m++) {
- lth = strlen(m->tag);
- if (!strncmp(s, m->tag, lth)) {
- *(m->valptr) = xstrdup(s + lth);
- return 1;
- }
- }
- return 0;
-}
-
-/* Report on a single mount. */
-static void
-print_one (const struct my_mntent *me) {
-
- char *fsname = NULL;
-
- if (mount_quiet)
- return;
-
- /* users assume backing file name rather than /dev/loopN in
- * mount(8) output if the device has been initialized by mount(8).
- */
- if (strncmp(me->mnt_fsname, "/dev/loop", 9) == 0 &&
- loopdev_is_autoclear(me->mnt_fsname))
- fsname = loopdev_get_backing_file(me->mnt_fsname);
-
- if (!fsname)
- fsname = (char *) me->mnt_fsname;
-
- printf ("%s on %s", fsname, me->mnt_dir);
- if (me->mnt_type != NULL && *(me->mnt_type) != '\0')
- printf (" type %s", me->mnt_type);
- if (me->mnt_opts != NULL)
- printf (" (%s)", me->mnt_opts);
- if (list_with_volumelabel && is_pseudo_fs(me->mnt_type) == 0) {
- const char *devname = spec_to_devname(me->mnt_fsname);
-
- if (devname) {
- const char *label;
-
- label = fsprobe_get_label_by_devname(devname);
- my_free(devname);
-
- if (label) {
- printf (" [%s]", label);
- my_free(label);
- }
- }
- }
- printf ("\n");
-}
-
-/* Report on everything in mtab (of the specified types if any). */
-static int
-print_all (char *types) {
- struct mntentchn *mc, *mc0;
-
- mc0 = mtab_head();
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt) {
- if (matching_type (mc->m.mnt_type, types))
- print_one (&(mc->m));
- }
-
- if (!mtab_does_not_exist() && !mtab_is_a_symlink() && is_readonly(_PATH_MOUNTED))
- printf(_("\n"
- "mount: warning: /etc/mtab is not writable (e.g. read-only filesystem).\n"
- " It's possible that information reported by mount(8) is not\n"
- " up to date. For actual information about system mount points\n"
- " check the /proc/mounts file.\n\n"));
-
- exit (0);
-}
-
-/* reallocates its first arg */
-static char *
-append_opt(char *s, const char *opt, const char *val)
-{
- if (!opt)
- return s;
- if (!s) {
- if (!val)
- return xstrdup(opt); /* opt */
-
- return xstrconcat3(NULL, opt, val); /* opt=val */
- }
- if (!val)
- return xstrconcat3(s, ",", opt); /* s,opt */
-
- return xstrconcat4(s, ",", opt, val); /* s,opt=val */
-}
-
-static char *
-append_numopt(char *s, const char *opt, unsigned int num)
-{
- char buf[32];
-
- snprintf(buf, sizeof(buf), "%u", num);
- return append_opt(s, opt, buf);
-}
-
-#ifdef HAVE_LIBSELINUX
-/* strip quotes from a "string"
- * Warning: This function modify the "str" argument.
- */
-static char *
-strip_quotes(char *str)
-{
- char *end = NULL;
-
- if (*str != '"')
- return str;
-
- end = strrchr(str, '"');
- if (end == NULL || end == str)
- die (EX_USAGE, _("mount: improperly quoted option string '%s'"), str);
-
- *end = '\0';
- return str+1;
-}
-
-/* translates SELinux context from human to raw format and
- * appends it to the mount extra options.
- *
- * returns -1 on error and 0 on success
- */
-static int
-append_context(const char *optname, char *optdata, char **extra_opts)
-{
- security_context_t raw = NULL;
- char *data = NULL;
-
- if (is_selinux_enabled() != 1)
- /* ignore the option if we running without selinux */
- return 0;
-
- if (optdata==NULL || *optdata=='\0' || optname==NULL)
- return -1;
-
- /* TODO: use strip_quotes() for all mount options? */
- data = *optdata =='"' ? strip_quotes(optdata) : optdata;
-
- if (selinux_trans_to_raw_context(
- (security_context_t) data, &raw) == -1 ||
- raw == NULL)
- return -1;
-
- if (verbose)
- printf(_("mount: translated %s '%s' to '%s'\n"),
- optname, data, (char *) raw);
-
- *extra_opts = append_opt(*extra_opts, optname, NULL);
- *extra_opts = xstrconcat4(*extra_opts, "\"", (char *) raw, "\"");
-
- freecon(raw);
- return 0;
-}
-
-/* returns newly allocated string without *context= options */
-static char *remove_context_options(char *opts)
-{
- char *begin = NULL, *end = NULL, *p;
- int open_quote = 0, changed = 0;
-
- if (!opts)
- return NULL;
-
- opts = xstrdup(opts);
-
- for (p = opts; p && *p; p++) {
- if (!begin)
- begin = p; /* begin of the option item */
- if (*p == '"')
- open_quote ^= 1; /* reverse the status */
- if (open_quote)
- continue; /* still in quoted block */
- if (*p == ',')
- end = p; /* terminate the option item */
- else if (*(p + 1) == '\0')
- end = p + 1; /* end of optstr */
- if (!begin || !end)
- continue;
-
- if (strncmp(begin, "context=", 8) == 0 ||
- strncmp(begin, "fscontext=", 10) == 0 ||
- strncmp(begin, "defcontext=", 11) == 0 ||
- strncmp(begin, "rootcontext=", 12) == 0 ||
- strncmp(begin, "seclabel", 8) == 0) {
- size_t sz;
-
- if ((begin == opts || *(begin - 1) == ',') && *end == ',')
- end++;
- sz = strlen(end);
-
- memmove(begin, end, sz + 1);
- if (!*begin && *(begin - 1) == ',')
- *(begin - 1) = '\0';
-
- p = begin;
- changed = 1;
- }
- begin = end = NULL;
- }
-
- if (changed && verbose)
- printf (_("mount: SELinux *context= options are ignore on remount.\n"));
-
- return opts;
-}
-
-static int has_context_option(char *opts)
-{
- if (get_option("context=", opts, NULL) ||
- get_option("fscontext=", opts, NULL) ||
- get_option("defcontext=", opts, NULL) ||
- get_option("rootcontext=", opts, NULL))
- return 1;
-
- return 0;
-}
-
-#endif
-
-/*
- * Look for OPT in opt_map table and return mask value.
- * If OPT isn't found, tack it onto extra_opts (which is non-NULL).
- * For the options uid= and gid= replace user or group name by its value.
- */
-static inline void
-parse_opt(char *opt, int *mask, int *inv_user, char **extra_opts) {
- const struct opt_map *om;
-
- for (om = opt_map; om->opt != NULL; om++)
- if (streq (opt, om->opt)) {
- if (om->inv)
- *mask &= ~om->mask;
- else
- *mask |= om->mask;
- if (om->inv && ((*mask & MS_USER) || (*mask & MS_USERS))
- && (om->mask & MS_SECURE))
- *inv_user |= om->mask;
- if ((om->mask == MS_USER || om->mask == MS_USERS)
- && !om->inv)
- *mask |= MS_SECURE;
- if ((om->mask == MS_OWNER || om->mask == MS_GROUP)
- && !om->inv)
- *mask |= MS_OWNERSECURE;
-#ifdef MS_SILENT
- if (om->mask == MS_SILENT && om->inv) {
- mount_quiet = 1;
- verbose = 0;
- }
-#endif
- if (om->mask == MS_COMMENT) {
- comment_flags |= om->cmask;
- if (om->cmask == MS_COMMENT_NOFAIL)
- opt_nofail = 1;
- }
- return;
- }
-
- /* convert nonnumeric ids to numeric */
- if (!strncmp(opt, "uid=", 4) && !isdigit(opt[4])) {
- struct passwd *pw = getpwnam(opt+4);
-
- if (pw) {
- *extra_opts = append_numopt(*extra_opts,
- "uid=", pw->pw_uid);
- return;
- }
- }
- if (!strncmp(opt, "gid=", 4) && !isdigit(opt[4])) {
- struct group *gr = getgrnam(opt+4);
-
- if (gr) {
- *extra_opts = append_numopt(*extra_opts,
- "gid=", gr->gr_gid);
- return;
- }
- }
-
-#ifdef HAVE_LIBSELINUX
- if (strncmp(opt, "context=", 8) == 0 && *(opt+8)) {
- if (append_context("context=", opt+8, extra_opts) == 0)
- return;
- }
- if (strncmp(opt, "fscontext=", 10) == 0 && *(opt+10)) {
- if (append_context("fscontext=", opt+10, extra_opts) == 0)
- return;
- }
- if (strncmp(opt, "defcontext=", 11) == 0 && *(opt+11)) {
- if (append_context("defcontext=", opt+11, extra_opts) == 0)
- return;
- }
- if (strncmp(opt, "rootcontext=", 12) == 0 && *(opt+12)) {
- if (append_context("rootcontext=", opt+12, extra_opts) == 0)
- return;
- }
-#endif
- *extra_opts = append_opt(*extra_opts, opt, NULL);
-}
-
-
-/* Take -o options list and compute 4th and 5th args to mount(2). flags
- gets the standard options (indicated by bits) and extra_opts all the rest */
-static void
-parse_opts (const char *options, int *flags, char **extra_opts) {
- *flags = 0;
- *extra_opts = NULL;
-
- clear_string_opts();
- clear_flags_opts();
-
- if (options != NULL) {
- char *opts = xstrdup(options);
- int open_quote = 0;
- char *opt, *p;
-
- for (p=opts, opt=NULL; p && *p; p++) {
- if (!opt)
- opt = p; /* begin of the option item */
- if (*p == '"')
- open_quote ^= 1; /* reverse the status */
- if (open_quote)
- continue; /* still in quoted block */
- if (*p == ',')
- *p = '\0'; /* terminate the option item */
- /* end of option item or last item */
- if (*p == '\0' || *(p+1) == '\0') {
- if (!parse_string_opt(opt))
- parse_opt(opt, flags, &invuser_flags, extra_opts);
- opt = NULL;
- }
- }
- free(opts);
- }
-
- if (readonly)
- *flags |= MS_RDONLY;
- if (readwrite)
- *flags &= ~MS_RDONLY;
-
- *flags |= mounttype;
-
- /* The propagation flags should not be used together with any
- * other flags (except MS_REC and MS_SILENT) */
- if (*flags & MS_PROPAGATION)
- *flags &= (MS_PROPAGATION | MS_REC | MS_SILENT);
-}
-
-/* Try to build a canonical options string. */
-static char *
-fix_opts_string (int flags, const char *extra_opts,
- const char *user, int inv_user)
-{
- const struct opt_map *om;
- const struct string_opt_map *m;
- char *new_opts;
-
- new_opts = append_opt(NULL, (flags & MS_RDONLY) ? "ro" : "rw", NULL);
- for (om = opt_map; om->opt != NULL; om++) {
- if (om->skip)
- continue;
- if (om->inv || !om->mask || (flags & om->mask) != om->mask)
- continue;
- if (om->mask == MS_COMMENT && !(comment_flags & om->cmask))
- continue;
- new_opts = append_opt(new_opts, om->opt, NULL);
- flags &= ~om->mask;
- }
- for (m = &string_opt_map[0]; m->tag; m++) {
- if (!m->skip && *(m->valptr))
- new_opts = append_opt(new_opts, m->tag, *(m->valptr));
- }
- if (extra_opts && *extra_opts)
- new_opts = append_opt(new_opts, extra_opts, NULL);
-
- if (user)
- new_opts = append_opt(new_opts, "user=", user);
-
- if (inv_user) {
- for (om = opt_map; om->opt != NULL; om++) {
- if (om->mask && om->inv
- && (inv_user & om->mask) == om->mask) {
- new_opts = append_opt(new_opts, om->opt, NULL);
- inv_user &= ~om->mask;
- }
- }
- }
-
- return new_opts;
-}
-
-static int
-already (const char *spec0, const char *node0) {
- struct mntentchn *mc;
- int ret = 1;
- char *spec = canonicalize_spec(spec0);
- char *node = canonicalize(node0);
-
- if ((mc = getmntfile(node)) != NULL)
- error (_("mount: according to mtab, "
- "%s is already mounted on %s"),
- mc->m.mnt_fsname, node);
- else if (spec && strcmp (spec, "none") &&
- (mc = getmntfile(spec)) != NULL)
- error (_("mount: according to mtab, %s is mounted on %s"),
- spec, mc->m.mnt_dir);
- else
- ret = 0;
-
- free(spec);
- free(node);
-
- return ret;
-}
-
-/* Create mtab with a root entry. */
-static void
-create_mtab (void) {
- struct mntentchn *fstab;
- struct my_mntent mnt;
- int flags;
- mntFILE *mfp;
-
- lock_mtab();
-
- mfp = my_setmntent (_PATH_MOUNTED, "a+");
- if (mfp == NULL || mfp->mntent_fp == NULL) {
- int errsv = errno;
- die (EX_FILEIO, _("mount: can't open %s for writing: %s"),
- _PATH_MOUNTED, strerror (errsv));
- }
-
- /* Find the root entry by looking it up in fstab */
- if ((fstab = getfs_by_dir ("/")) || (fstab = getfs_by_dir ("root"))) {
- char *extra_opts;
- parse_opts (fstab->m.mnt_opts, &flags, &extra_opts);
- mnt.mnt_dir = "/";
- mnt.mnt_fsname = spec_to_devname(fstab->m.mnt_fsname);
- mnt.mnt_type = fstab->m.mnt_type;
- mnt.mnt_opts = fix_opts_string (flags, extra_opts, NULL, 0);
- mnt.mnt_freq = mnt.mnt_passno = 0;
- free(extra_opts);
-
- if (my_addmntent (mfp, &mnt) == 1) {
- int errsv = errno;
- die (EX_FILEIO, _("mount: error writing %s: %s"),
- _PATH_MOUNTED, strerror (errsv));
- }
- }
- if (fchmod (fileno (mfp->mntent_fp), 0644) < 0)
- if (errno != EROFS) {
- int errsv = errno;
- die (EX_FILEIO,
- _("mount: error changing mode of %s: %s"),
- _PATH_MOUNTED, strerror (errsv));
- }
- my_endmntent (mfp);
-
- unlock_mtab();
-
- reset_mtab_info();
-}
-
-/* count successful mount system calls */
-static int mountcount = 0;
-
-/*
- * do_mount_syscall()
- * Mount a single file system. Keep track of successes.
- * returns: 0: OK, -1: error in errno
- */
-static int
-do_mount_syscall (struct mountargs *args) {
- int flags = args->flags;
-
- if ((flags & MS_MGC_MSK) == 0)
- flags |= MS_MGC_VAL;
-
- if (verbose > 2)
- printf("mount: mount(2) syscall: source: \"%s\", target: \"%s\", "
- "filesystemtype: \"%s\", mountflags: %d, data: %s\n",
- args->spec, args->node, args->type, flags, (char *) args->data);
-
- return mount (args->spec, args->node, args->type, flags, args->data);
-}
-
-/*
- * do_mount()
- * Mount a single file system, possibly invoking an external handler to
- * do so. Keep track of successes.
- * returns: 0: OK, -1: error in errno
- */
-static int
-do_mount (struct mountargs *args, int *special, int *status) {
- int ret;
- if (check_special_mountprog(args->spec, args->node, args->type,
- args->flags, args->data, status)) {
- *special = 1;
- ret = 0;
- } else {
- ret = do_mount_syscall(args);
- }
- if (ret == 0)
- mountcount++;
- return ret;
-}
-
-/*
- * check_special_mountprog()
- * If there is a special mount program for this type, exec it.
- * returns: 0: no exec was done, 1: exec was done, status has result
- */
-static int
-check_special_mountprog(const char *spec, const char *node, const char *type, int flags,
- char *extra_opts, int *status) {
- char search_path[] = FS_SEARCH_PATH;
- char *path, mountprog[150];
- struct stat statbuf;
- int res;
-
- if (!external_allowed)
- return 0;
-
- if (type == NULL || strcmp(type, "none") == 0)
- return 0;
-
- path = strtok(search_path, ":");
- while (path) {
- int type_opt = 0;
-
- res = snprintf(mountprog, sizeof(mountprog), "%s/mount.%s",
- path, type);
- path = strtok(NULL, ":");
- if (res < 0 || (size_t) res >= sizeof(mountprog))
- continue;
-
- res = stat(mountprog, &statbuf);
- if (res == -1 && errno == ENOENT && strchr(type, '.')) {
- /* If type ends with ".subtype" try without it */
- *strrchr(mountprog, '.') = '\0';
- type_opt = 1;
- res = stat(mountprog, &statbuf);
- }
- if (res)
- continue;
-
- if (verbose)
- fflush(stdout);
-
- switch (fork()) {
- case 0: { /* child */
- char *oo, *mountargs[12];
- int i = 0;
-
- if (setgid(getgid()) < 0)
- die(EX_FAIL, _("mount: cannot set group id: %m"));
-
- if (setuid(getuid()) < 0)
- die(EX_FAIL, _("mount: cannot set user id: %m"));
-
- oo = fix_opts_string(flags, extra_opts, NULL, invuser_flags);
- mountargs[i++] = mountprog; /* 1 */
- mountargs[i++] = (char *) spec; /* 2 */
- mountargs[i++] = (char *) node; /* 3 */
- if (sloppy && strncmp(type, "nfs", 3) == 0)
- mountargs[i++] = "-s"; /* 4 */
- if (fake)
- mountargs[i++] = "-f"; /* 5 */
- if (nomtab)
- mountargs[i++] = "-n"; /* 6 */
- if (verbose)
- mountargs[i++] = "-v"; /* 7 */
- if (oo && *oo) {
- mountargs[i++] = "-o"; /* 8 */
- mountargs[i++] = oo; /* 9 */
- }
- if (type_opt) {
- mountargs[i++] = "-t"; /* 10 */
- mountargs[i++] = (char *) type; /* 11 */
- }
- mountargs[i] = NULL; /* 12 */
-
- if (verbose > 2) {
- i = 0;
- while (mountargs[i]) {
- printf("mount: external mount: argv[%d] = \"%s\"\n",
- i, mountargs[i]);
- i++;
- }
- fflush(stdout);
- }
-
- execv(mountprog, mountargs);
- exit(1); /* exec failed */
- }
-
- default: { /* parent */
- int st;
- wait(&st);
- *status = (WIFEXITED(st) ? WEXITSTATUS(st) : EX_SYSERR);
- return 1;
- }
-
- case -1: { /* error */
- int errsv = errno;
- error(_("mount: cannot fork: %s"), strerror(errsv));
- }
- }
- }
-
- return 0;
-}
-
-
-/* list of already tested filesystems by procfsloop_mount() */
-static struct tried {
- struct tried *next;
- char *type;
-} *tried = NULL;
-
-static int
-was_tested(const char *fstype) {
- struct tried *t;
-
- for (t = tried; t; t = t->next) {
- if (!strcmp(t->type, fstype))
- return 1;
- }
- return 0;
-}
-
-static void
-set_tested(const char *fstype) {
- struct tried *t = xmalloc(sizeof(struct tried));
-
- t->next = tried;
- t->type = xstrdup(fstype);
- tried = t;
-}
-
-static void
-free_tested(void) {
- struct tried *t, *tt;
-
- t = tried;
- while(t) {
- free(t->type);
- tt = t->next;
- free(t);
- t = tt;
- }
- tried = NULL;
-}
-
-static char *
-procfsnext(FILE *procfs) {
- char line[100];
- char fsname[100];
-
- while (fgets(line, sizeof(line), procfs)) {
- if (sscanf (line, "nodev %[^#\n]\n", fsname) == 1) continue;
- if (sscanf (line, " %[^# \n]\n", fsname) != 1) continue;
- return xstrdup(fsname);
- }
- return 0;
-}
-
-/* Only use /proc/filesystems here, this is meant to test what
- the kernel knows about, so /etc/filesystems is irrelevant.
- Return: 1: yes, 0: no, -1: cannot open procfs */
-static int
-known_fstype_in_procfs(const char *type)
-{
- FILE *procfs;
- char *fsname;
- int ret = -1;
-
- procfs = fopen(_PATH_PROC_FILESYSTEMS, "r");
- if (procfs) {
- ret = 0;
- while ((fsname = procfsnext(procfs)) != NULL)
- if (!strcmp(fsname, type)) {
- ret = 1;
- break;
- }
- fclose(procfs);
- procfs = NULL;
- }
- return ret;
-}
-
-/* Try all types in FILESYSTEMS, except those in *types,
- in case *types starts with "no" */
-/* return: 0: OK, -1: error in errno, 1: type not found */
-/* when 0 or -1 is returned, *types contains the type used */
-/* when 1 is returned, *types is NULL */
-static int
-procfsloop_mount(int (*mount_fn)(struct mountargs *, int *, int *),
- struct mountargs *args,
- const char **types,
- int *special, int *status)
-{
- char *files[2] = { _PATH_FILESYSTEMS, _PATH_PROC_FILESYSTEMS };
- FILE *procfs;
- char *fsname;
- const char *notypes = NULL;
- int no = 0;
- int ret = 1;
- int errsv = 0;
- int i;
-
- if (*types && !strncmp(*types, "no", 2)) {
- no = 1;
- notypes = (*types) + 2;
- }
- *types = NULL;
-
- /* Use _PATH_PROC_FILESYSTEMS only when _PATH_FILESYSTEMS
- * (/etc/filesystems) does not exist. In some cases trying a
- * filesystem that the kernel knows about on the wrong data will crash
- * the kernel; in such cases _PATH_FILESYSTEMS can be used to list the
- * filesystems that we are allowed to try, and in the order they should
- * be tried. End _PATH_FILESYSTEMS with a line containing a single '*'
- * only, if _PATH_PROC_FILESYSTEMS should be tried afterwards.
- */
- for (i=0; i<2; i++) {
- procfs = fopen(files[i], "r");
- if (!procfs)
- continue;
- while ((fsname = procfsnext(procfs)) != NULL) {
- if (!strcmp(fsname, "*")) {
- fclose(procfs);
- goto nexti;
- }
- if (was_tested (fsname))
- continue;
- if (no && matching_type(fsname, notypes))
- continue;
- set_tested (fsname);
- args->type = fsname;
- if (verbose)
- printf(_("Trying %s\n"), fsname);
- if ((*mount_fn) (args, special, status) == 0) {
- *types = fsname;
- ret = 0;
- break;
- } else if (errno != EINVAL &&
- known_fstype_in_procfs(fsname) == 1) {
- *types = "guess";
- ret = -1;
- errsv = errno;
- break;
- }
- }
- free_tested();
- fclose(procfs);
- errno = errsv;
- return ret;
- nexti:;
- }
- return 1;
-}
-
-static const char *
-guess_fstype_by_devname(const char *devname, int *ambivalent)
-{
- const char *type = fsprobe_get_fstype_by_devname_ambi(devname, ambivalent);
-
- if (verbose) {
- printf (_("mount: you didn't specify a filesystem type for %s\n"), devname);
-
- if (!type)
- printf (_(" I will try all types mentioned in %s or %s\n"),
- _PATH_FILESYSTEMS, _PATH_PROC_FILESYSTEMS);
- else if (!strcmp(type, MNTTYPE_SWAP))
- printf (_(" and it looks like this is swapspace\n"));
- else
- printf (_(" I will try type %s\n"), type);
- }
- return type;
-}
-
-/*
- * guess_fstype_and_mount()
- * Mount a single file system. Guess the type when unknown.
- * returns: 0: OK, -1: error in errno, 1: other error
- * don't exit on non-fatal errors.
- * on return types is filled with the type used.
- */
-static int
-guess_fstype_and_mount(const char *spec, const char *node, const char **types,
- int flags, char *mount_opts, int *special, int *status) {
- struct mountargs args = { spec, node, NULL, flags & ~MS_NOSYS, mount_opts };
- int ambivalent = 0;
-
- if (*types && strcasecmp (*types, "auto") == 0)
- *types = NULL;
-
- if (!*types && !(flags & MS_REMOUNT)) {
- *types = guess_fstype_by_devname(spec, &ambivalent);
- if (*types) {
- if (!strcmp(*types, MNTTYPE_SWAP)) {
- error(_("%s looks like swapspace - not mounted"), spec);
- *types = NULL;
- return 1;
- } else {
- args.type = *types;
- return do_mount (&args, special, status);
- }
- } else if (ambivalent) {
- error(_("mount: %s: more filesystems detected. This should not happen,\n"
- " use -t <type> to explicitly specify the filesystem type or\n"
- " use wipefs(8) to clean up the device.\n"), spec);
- return 1;
- }
- }
-
- /* Accept a comma-separated list of types, and try them one by one */
- /* A list like "nonfs,.." indicates types not to use */
- if (*types && strncmp(*types, "no", 2) && strchr(*types,',')) {
- char *t = strdup(*types);
- char *p;
-
- while((p = strchr(t,',')) != NULL) {
- *p = 0;
- args.type = *types = t;
- if (do_mount (&args, special, status) == 0)
- return 0;
- t = p+1;
- }
- /* do last type below */
- *types = t;
- }
-
- if (*types || (flags & MS_REMOUNT)) {
- args.type = *types;
- return do_mount (&args, special, status);
- }
-
- return procfsloop_mount(do_mount, &args, types, special, status);
-}
-
-/*
- * restricted_check()
- * Die if the user is not allowed to do this.
- */
-static void
-restricted_check(const char *spec, const char *node, int *flags, char **user) {
- if (restricted) {
- /*
- * MS_OWNER: Allow owners to mount when fstab contains
- * the owner option. Note that this should never be used
- * in a high security environment, but may be useful to give
- * people at the console the possibility of mounting a floppy.
- * MS_GROUP: Allow members of device group to mount. (Martin Dickopp)
- */
- if (*flags & (MS_OWNER | MS_GROUP)) {
- struct stat sb;
-
- if (!strncmp(spec, "/dev/", 5) && stat(spec, &sb) == 0) {
-
- if (*flags & MS_OWNER) {
- if (getuid() == sb.st_uid)
- *flags |= MS_USER;
- }
-
- if (*flags & MS_GROUP) {
- if (getgid() == sb.st_gid)
- *flags |= MS_USER;
- else {
- int n = getgroups(0, NULL);
-
- if (n > 0) {
- gid_t *groups = xmalloc(n * sizeof(*groups));
- if (getgroups(n, groups) == n) {
- int i;
- for (i = 0; i < n; i++) {
- if (groups[i] == sb.st_gid) {
- *flags |= MS_USER;
- break;
- }
- }
- }
- free(groups);
- }
- }
- }
- }
- }
-
- /* James Kehl <mkehl@gil.com.au> came with a similar patch:
- allow an arbitrary user to mount when he is the owner of
- the mount-point and has write-access to the device.
- This is even less secure. Let me skip it for the time being;
- there should be an explicit fstab line allowing such things. */
-
- if (!(*flags & (MS_USER | MS_USERS))) {
- if (already (spec, node))
- die (EX_USAGE, _("mount failed"));
- else
- die (EX_USAGE, _("mount: only root can mount %s on %s"), spec, node);
- }
- if (*flags & MS_USER)
- *user = getusername();
- }
-
- *flags &= ~(MS_OWNER | MS_GROUP);
-}
-
-/* Check, if there already exists a mounted loop device on the mountpoint node
- * with the same parameters.
- */
-static int
-is_mounted_same_loopfile(const char *node0, const char *loopfile, unsigned long long offset)
-{
- struct mntentchn *mnt = NULL;
- char *node;
- int res = 0;
-
- node = canonicalize(node0);
-
- /* Search for mountpoint node in mtab,
- * procceed if any of these has the loop option set or
- * the device is a loop device
- */
- mnt = getmntdirbackward(node, mnt);
- if (!mnt) {
- free(node);
- return 0;
- }
- for(; mnt && res == 0; mnt = getmntdirbackward(node, mnt)) {
- char *p;
-
- if (strncmp(mnt->m.mnt_fsname, "/dev/loop", 9) == 0)
- res = loopdev_is_used((char *) mnt->m.mnt_fsname,
- loopfile, offset, LOOPDEV_FL_OFFSET);
-
- else if (mnt->m.mnt_opts &&
- (p = strstr(mnt->m.mnt_opts, "loop=")))
- {
- char *dev = xstrdup(p+5);
- if ((p = strchr(dev, ',')))
- *p = '\0';
- res = loopdev_is_used(dev,
- loopfile, offset, LOOPDEV_FL_OFFSET);
- free(dev);
- }
- }
-
- free(node);
- return res;
-}
-
-static int
-parse_offset(const char **opt, uintmax_t *val)
-{
- char *tmp;
-
- if (strtosize(*opt, val))
- return -1;
-
- tmp = xmalloc(32);
- snprintf(tmp, 32, "%jd", *val);
- my_free(*opt);
- *opt = tmp;
- return 0;
-}
-
-static int
-loop_check(const char **spec, const char **type, int *flags,
- int *loop, const char **loopdev, const char **loopfile,
- const char *node) {
- int looptype;
- uintmax_t offset = 0, sizelimit = 0;
- struct loopdev_cxt lc;
- char *pwd = NULL;
- int ret = EX_FAIL;
-
- /*
- * In the case of a loop mount, either type is of the form lo@/dev/loop5
- * or the option "-o loop=/dev/loop5" or just "-o loop" is given, or
- * mount just has to figure things out for itself from the fact that
- * spec is not a block device. We do not test for a block device
- * immediately: maybe later other types of mountable objects will occur.
- */
-
- *loopdev = opt_loopdev;
-
- looptype = (*type && strncmp("lo@", *type, 3) == 0);
- if (looptype) {
- if (*loopdev)
- error(_("mount: loop device specified twice"));
- *loopdev = *type + 3;
- *type = opt_vfstype;
- } else if (opt_vfstype) {
- if (*type)
- error(_("mount: type specified twice"));
- else
- *type = opt_vfstype;
- }
-
- *loop = ((*flags & MS_LOOP) || *loopdev || opt_offset || opt_sizelimit);
- *loopfile = *spec;
-
- /* Automatically create a loop device from a regular file if a filesystem
- * is not specified or the filesystem is known for libblkid (these
- * filesystems work with block devices only).
- *
- * Note that there is not a restriction (on kernel side) that prevents regular
- * file as a mount(2) source argument. A filesystem that is able to mount
- * regular files could be implemented.
- */
- if (!*loop && !(*flags & (MS_BIND | MS_MOVE | MS_PROPAGATION)) &&
- (!*type || strcmp(*type, "auto") == 0 || fsprobe_known_fstype(*type))) {
-
- struct stat st;
- if (stat(*loopfile, &st) == 0)
- *loop = S_ISREG(st.st_mode);
- }
-
- if (*loop) {
- *flags |= MS_LOOP;
- if (fake) {
- if (verbose)
- printf(_("mount: skipping the setup of a loop device\n"));
- } else {
- int loop_opts = 0;
-
- /* since 2.6.37 we don't have to store backing filename to mtab
- * because kernel provides the name in /sys
- */
- if (get_linux_version() >= KERNEL_VERSION(2, 6, 37) ||
- mtab_is_writable() == 0) {
-
- if (verbose)
- printf(_("mount: enabling autoclear loopdev flag\n"));
- loop_opts = LO_FLAGS_AUTOCLEAR;
- }
-
- if (*flags & MS_RDONLY)
- loop_opts |= LO_FLAGS_READ_ONLY;
-
- if (opt_offset && parse_offset(&opt_offset, &offset)) {
- error(_("mount: invalid offset '%s' specified"), opt_offset);
- return EX_FAIL;
- }
- if (opt_sizelimit && parse_offset(&opt_sizelimit, &sizelimit)) {
- error(_("mount: invalid sizelimit '%s' specified"), opt_sizelimit);
- return EX_FAIL;
- }
-
- if (is_mounted_same_loopfile(node, *loopfile, offset)) {
- error(_("mount: according to mtab %s is already mounted on %s as loop"), *loopfile, node);
- return EX_FAIL;
- }
-
- if (opt_encryption) {
- error("mount: %s", _("encryption not supported, use cryptsetup(8) instead"));
- return EX_FAIL;
- }
-
- if (loopcxt_init(&lc, 0) < 0) {
- error(_("mount: failed to initialize loopdev context"));
- return EX_FAIL;
- }
-
- if (*loopdev && **loopdev && loopcxt_set_device(&lc, *loopdev) < 0) {
- error(_("mount: failed to use %s device"), *loopdev);
- return EX_FAIL;
- }
-
- do {
- int rc;
-
- if ((!*loopdev || !**loopdev) && loopcxt_find_unused(&lc) == 0)
- *loopdev = loopcxt_strdup_device(&lc);
-
- if (!*loopdev) {
- error(_("mount: failed to found free loop device"));
- loopcxt_deinit(&lc);
- goto err; /* no more loop devices */
- }
- if (verbose)
- printf(_("mount: going to use the loop device %s\n"), *loopdev);
-
- rc = loopcxt_set_backing_file(&lc, *loopfile);
-
- if (!rc && offset)
- rc = loopcxt_set_offset(&lc, offset);
- if (!rc && sizelimit)
- rc = loopcxt_set_sizelimit(&lc, sizelimit);
- if (!rc)
- loopcxt_set_flags(&lc, loop_opts);
-
- if (rc) {
- error(_("mount: %s: failed to set loopdev attributes"), *loopdev);
- loopcxt_deinit(&lc);
- goto err;
- }
-
- /* setup the device */
- rc = loopcxt_setup_device(&lc);
- if (!rc)
- break; /* success */
-
- if (rc != -EBUSY) {
- error(_("mount: %s: failed setting up loop device: %m"), *loopfile);
- if (!opt_loopdev) {
- my_free(*loopdev);
- *loopdev = NULL;
- }
- loopcxt_deinit(&lc);
- goto err;
- }
-
- if (!opt_loopdev) {
- if (verbose)
- printf(_("mount: stolen loop=%s ...trying again\n"), *loopdev);
- my_free(*loopdev);
- *loopdev = NULL;
- continue;
- }
- error(_("mount: stolen loop=%s"), *loopdev);
- loopcxt_deinit(&lc);
- goto err;
-
- } while (!*loopdev);
-
- if (verbose > 1)
- printf(_("mount: setup loop device successfully\n"));
- *spec = *loopdev;
-
- if (loopcxt_is_readonly(&lc))
- *flags |= MS_RDONLY;
-
- if (loopcxt_is_autoclear(&lc))
- /* Prevent recording loop dev in mtab for cleanup on umount */
- *loop = 0;
-
- /* We have to keep the device open until mount(2), otherwise it will
- * be auto-cleared by kernel (because LO_FLAGS_AUTOCLEAR) */
- loopcxt_set_fd(&lc, -1, 0);
- loopcxt_deinit(&lc);
- }
- }
-
- ret = 0;
-err:
- if (pwd) {
- char *p = pwd;
- while (*p)
- *p++ = '\0';
- free(pwd);
- }
- return ret;
-}
-
-
-static void
-update_mtab_entry(const char *spec, const char *node, const char *type,
- const char *opts, int flags, int freq, int pass) {
- struct my_mntent mnt;
-
- mnt.mnt_fsname = is_pseudo_fs(type) ? xstrdup(spec) : canonicalize(spec);
- mnt.mnt_dir = canonicalize (node);
- mnt.mnt_type = type;
- mnt.mnt_opts = opts;
- mnt.mnt_freq = freq;
- mnt.mnt_passno = pass;
-
- /* We get chatty now rather than after the update to mtab since the
- mount succeeded, even if the write to /etc/mtab should fail. */
- if (verbose)
- print_one (&mnt);
-
- if (!nomtab && mtab_does_not_exist()) {
- if (verbose > 1)
- printf(_("mount: no %s found - creating it..\n"),
- _PATH_MOUNTED);
- create_mtab ();
-
- }
-
- if (!nomtab && mtab_is_writable()) {
- if (flags & MS_REMOUNT)
- update_mtab (mnt.mnt_dir, &mnt);
- else if (flags & MS_MOVE)
- update_mtab(mnt.mnt_fsname, &mnt);
- else
- update_mtab(NULL, &mnt);
- }
- my_free(mnt.mnt_fsname);
- my_free(mnt.mnt_dir);
-}
-
-static void
-cdrom_setspeed(const char *spec) {
-#define CDROM_SELECT_SPEED 0x5322 /* Set the CD-ROM speed */
- if (opt_speed) {
- int cdrom;
- int speed = atoi(opt_speed);
-
- if ((cdrom = open(spec, O_RDONLY | O_NONBLOCK)) < 0)
- die(EX_FAIL,
- _("mount: cannot open %s for setting speed"),
- spec);
- if (ioctl(cdrom, CDROM_SELECT_SPEED, speed) < 0)
- die(EX_FAIL, _("mount: cannot set speed: %m"));
- close(cdrom);
- }
-}
-
-/*
- * Check if @path is on read-only filesystem independently on file permissions.
- */
-static int
-is_readonly(const char *path)
-{
- if (access(path, W_OK) == 0)
- return 0;
- if (errno == EROFS)
- return 1;
- if (errno != EACCES)
- return 0;
-
-#ifdef HAVE_FUTIMENS
- /*
- * access(2) returns EACCES on read-only FS:
- *
- * - for set-uid application if one component of the path is not
- * accessible for the current rUID. (Note that euidaccess(2) does not
- * check for EROFS at all).
- *
- * - for read-write filesystem with read-only VFS node (aka -o remount,ro,bind)
- */
- {
- struct timespec times[2];
-
- times[0].tv_nsec = UTIME_NOW; /* atime */
- times[1].tv_nsec = UTIME_OMIT; /* mtime */
-
- if (utimensat(AT_FDCWD, path, times, 0) == -1)
- return errno == EROFS;
- }
-#endif
- return 0;
-}
-
-/*
- * try_mount_one()
- * Try to mount one file system.
- *
- * returns: 0: OK, EX_SYSERR, EX_FAIL, return code from nfsmount,
- * return status from wait
- */
-static int
-try_mount_one (const char *spec0, const char *node0, const char *types0,
- const char *opts0, int freq, int pass, int ro) {
- int res = 0, status = 0, special = 0;
- int mnt5_res = 0; /* only for gcc */
- int mnt_err;
- int flags;
- char *extra_opts; /* written in mtab */
- char *mount_opts; /* actually used on system call */
- const char *opts, *spec, *node, *types;
- char *user = 0;
- int loop = 0;
- const char *loopdev = 0, *loopfile = 0;
- struct stat statbuf;
-
- /* copies for freeing on exit */
- const char *opts1, *spec1, *node1, *types1;
-
- if (verbose > 2) {
- printf("mount: spec: \"%s\"\n", spec0);
- printf("mount: node: \"%s\"\n", node0);
- printf("mount: types: \"%s\"\n", types0);
- printf("mount: opts: \"%s\"\n", opts0);
- }
-
- spec = spec1 = xstrdup(spec0);
- node = node1 = xstrdup(node0);
- types = types1 = xstrdup(types0);
- opts = opts1 = xstrdup(opts0);
-
- parse_opts (opts, &flags, &extra_opts);
- mount_opts = xstrdup(extra_opts);
-
- /* quietly succeed for fstab entries that don't get mounted automatically */
- if (mount_all && (flags & MS_NOAUTO))
- goto out;
-
- restricted_check(spec, node, &flags, &user);
-
- /* The "mount -f" checks for for existing record in /etc/mtab (with
- * regular non-fake mount this is usually done by kernel)
- */
- if (!(flags & MS_REMOUNT) && fake && mounted (spec, node, NULL))
- die(EX_USAGE, _("mount: according to mtab, "
- "%s is already mounted on %s\n"),
- spec, node);
-
- if (opt_speed)
- cdrom_setspeed(spec);
-
- if (!(flags & MS_REMOUNT)) {
- /*
- * Don't set up a (new) loop device if we only remount - this left
- * stale assignments of files to loop devices. Nasty when used for
- * encryption.
- */
- res = loop_check(&spec, &types, &flags, &loop, &loopdev, &loopfile, node);
- if (res)
- goto out;
- }
-
- if (loop)
- opt_loopdev = loopdev;
-
- if (flags & (MS_BIND | MS_MOVE | MS_PROPAGATION))
- types = "none";
-
-#ifdef HAVE_LIBSELINUX
- if (flags & MS_REMOUNT) {
- /*
- * Linux kernel does not accept any selinux context option on remount
- */
- if (mount_opts) {
- char *tmp = mount_opts;
- mount_opts = remove_context_options(mount_opts);
- my_free(tmp);
- }
-
- } else if (types && strcmp(types, "tmpfs") == 0 && is_selinux_enabled() > 0 &&
- !has_context_option(mount_opts)) {
- /*
- * Add rootcontext= mount option for tmpfs
- * https://bugzilla.redhat.com/show_bug.cgi?id=476964
- */
- security_context_t sc = NULL;
-
- if (getfilecon(node, &sc) > 0 && strcmp("unlabeled", sc))
- append_context("rootcontext=", (char *) sc, &mount_opts);
- freecon(sc);
- }
-#endif
-
- /*
- * Call mount.TYPE for types that require a separate mount program.
- * For the moment these types are ncpfs and smbfs. Maybe also vxfs.
- * All such special things must occur isolated in the types string.
- */
- if (check_special_mountprog(spec, node, types, flags, mount_opts, &status)) {
- res = status;
- goto out;
- }
-
- block_signals (SIG_BLOCK);
-
- if (!fake) {
- mnt5_res = guess_fstype_and_mount (spec, node, &types, flags & ~MS_NOSYS,
- mount_opts, &special, &status);
-
- if (special) {
- block_signals (SIG_UNBLOCK);
- res = status;
- goto out;
- }
- }
-
- /* Kernel allows to use MS_RDONLY for bind mounts, but the read-only request
- * could be silently ignored. Check it to avoid 'ro' in mtab and 'rw' in
- * /proc/mounts.
- */
- if (!fake && mnt5_res == 0 &&
- (flags & MS_BIND) && (flags & MS_RDONLY) && !is_readonly(node)) {
-
- printf(_("mount: warning: %s seems to be mounted read-write.\n"), node);
- flags &= ~MS_RDONLY;
- }
-
- /* Kernel can silently add MS_RDONLY flag when mounting file system that
- * does not have write support. Check this to avoid 'ro' in /proc/mounts
- * and 'rw' in mtab.
- */
- if (!fake && mnt5_res == 0 &&
- !(flags & (MS_RDONLY | MS_PROPAGATION | MS_MOVE)) &&
- is_readonly(node)) {
-
- printf(_("mount: warning: %s seems to be mounted read-only.\n"), node);
- flags |= MS_RDONLY;
- }
-
- if (fake || mnt5_res == 0) {
- char *mo = fix_opts_string (flags & ~MS_NOMTAB, extra_opts, user, 0);
- const char *tp = types ? types : "unknown";
-
- /* Mount succeeded, report this (if verbose) and write mtab entry. */
- if (!(mounttype & MS_PROPAGATION))
- update_mtab_entry(loop ? loopfile : spec,
- node,
- tp,
- mo,
- flags,
- freq,
- pass);
-
- block_signals (SIG_UNBLOCK);
- free(mo);
-
- res = 0;
- goto out;
- }
-
- mnt_err = errno;
-
- if (loop)
- loopdev_delete(spec);
-
- block_signals (SIG_UNBLOCK);
-
- /* Mount failed, complain, but don't die. */
-
- if (types == NULL) {
- if (restricted)
- error (_("mount: I could not determine the filesystem type, "
- "and none was specified"));
- else
- error (_("mount: you must specify the filesystem type"));
- } else if (mnt5_res != -1) {
- /* should not happen */
- error (_("mount: mount failed"));
- } else {
- switch (mnt_err) {
- case EPERM:
- if (geteuid() == 0) {
- if (stat (node, &statbuf) || !S_ISDIR(statbuf.st_mode))
- error (_("mount: mount point %s is not a directory"), node);
- else
- error (_("mount: permission denied"));
- } else
- error (_("mount: must be superuser to use mount"));
- break;
- case EBUSY:
- if (flags & MS_REMOUNT) {
- error (_("mount: %s is busy"), node);
- } else if (!strcmp(types, "proc") && !strcmp(node, "/proc")) {
- /* heuristic: if /proc/version exists, then probably proc is mounted */
- if (stat ("/proc/version", &statbuf)) /* proc mounted? */
- error (_("mount: %s is busy"), node); /* no */
- else if (!mount_all || verbose) /* yes, don't mention it */
- error (_("mount: proc already mounted"));
- } else {
- error (_("mount: %s already mounted or %s busy"), spec, node);
- already (spec, node);
- }
- break;
- case ENOENT:
- if (lstat (node, &statbuf))
- error (_("mount: mount point %s does not exist"), node);
- else if (stat (node, &statbuf))
- error (_("mount: mount point %s is a symbolic link to nowhere"),
- node);
- else if (stat (spec, &statbuf)) {
- if (opt_nofail)
- goto out;
- error (_("mount: special device %s does not exist"), spec);
- } else {
- errno = mnt_err;
- perror("mount");
- }
- break;
- case ENOTDIR:
- if (stat (node, &statbuf) || ! S_ISDIR(statbuf.st_mode))
- error (_("mount: mount point %s is not a directory"), node);
- else if (stat (spec, &statbuf) && errno == ENOTDIR) {
- if (opt_nofail)
- goto out;
- error (_("mount: special device %s does not exist\n"
- " (a path prefix is not a directory)\n"), spec);
- } else {
- errno = mnt_err;
- perror("mount");
- }
- break;
- case EINVAL:
- { int fd;
- unsigned long long size = 0;
-
- if (flags & MS_REMOUNT) {
- error (_("mount: %s not mounted or bad option"), node);
- } else {
- error (_("mount: wrong fs type, bad option, bad superblock on %s,\n"
- " missing codepage or helper program, or other error"),
- spec);
-
- if (stat(spec, &statbuf) < 0) {
- if (errno == ENOENT) /* network FS? */
- error(_(
- " (for several filesystems (e.g. nfs, cifs) you might\n"
- " need a /sbin/mount.<type> helper program)"));
-
- } else if (S_ISBLK(statbuf.st_mode)
- && (fd = open(spec, O_RDONLY | O_NONBLOCK)) >= 0) {
-
- if (blkdev_get_size(fd, &size) == 0) {
- if (size == 0 && !loop)
- error(_(
- " (could this be the IDE device where you in fact use\n"
- " ide-scsi so that sr0 or sda or so is needed?)"));
-
- if (size && size <= 2)
- error(_(
- " (aren't you trying to mount an extended partition,\n"
- " instead of some logical partition inside?)"));
-
- close(fd);
- }
- }
- error(_(
- " In some cases useful info is found in syslog - try\n"
- " dmesg | tail or so\n"));
- }
- break;
- }
- case EMFILE:
- error (_("mount table full")); break;
- case EIO:
- error (_("mount: %s: can't read superblock"), spec); break;
- case ENODEV:
- {
- int pfs = known_fstype_in_procfs(types);
-
- if (pfs == 1 || !strcmp(types, "guess"))
- error(_("mount: %s: unknown device"), spec);
- else if (pfs == 0) {
- char *lowtype, *p;
- int u;
-
- error (_("mount: unknown filesystem type '%s'"), types);
-
- /* maybe this loser asked for FAT or ISO9660 or isofs */
- lowtype = xstrdup(types);
- u = 0;
- for(p=lowtype; *p; p++) {
- if(tolower(*p) != *p) {
- *p = tolower(*p);
- u++;
- }
- }
- if (u && known_fstype_in_procfs(lowtype) == 1)
- error (_("mount: probably you meant %s"), lowtype);
- else if (!strncmp(lowtype, "iso", 3) &&
- known_fstype_in_procfs("iso9660") == 1)
- error (_("mount: maybe you meant 'iso9660'?"));
- else if (!strncmp(lowtype, "fat", 3) &&
- known_fstype_in_procfs("vfat") == 1)
- error (_("mount: maybe you meant 'vfat'?"));
- free(lowtype);
- } else
- error (_("mount: %s has wrong device number or fs type %s not supported"),
- spec, types);
- break;
- }
- case ENOTBLK:
- if (opt_nofail)
- goto out;
- if (stat (spec, &statbuf)) /* strange ... */
- error (_("mount: %s is not a block device, and stat fails?"), spec);
- else if (S_ISBLK(statbuf.st_mode))
- error (_("mount: the kernel does not recognize %s as a block device\n"
- " (maybe `modprobe driver'?)"), spec);
- else if (S_ISREG(statbuf.st_mode))
- error (_("mount: %s is not a block device (maybe try `-o loop'?)"),
- spec);
- else
- error (_("mount: %s is not a block device"), spec);
- break;
- case ENXIO:
- if (opt_nofail)
- goto out;
- error (_("mount: %s is not a valid block device"), spec); break;
- case EACCES: /* pre-linux 1.1.38, 1.1.41 and later */
- case EROFS: /* linux 1.1.38 and later */
- { char *bd = (loop ? "" : _("block device "));
- if (ro || (flags & MS_RDONLY)) {
- error (_("mount: cannot mount %s%s read-only"),
- bd, spec);
- break;
- } else if (readwrite) {
- error (_("mount: %s%s is write-protected but explicit `-w' flag given"),
- bd, spec);
- break;
- } else if (flags & MS_REMOUNT) {
- error (_("mount: cannot remount %s%s read-write, is write-protected"),
- bd, spec);
- break;
- } else {
- opts = opts0;
- types = types0;
-
- if (opts) {
- char *opts2 = append_opt(xstrdup(opts), "ro", NULL);
- my_free(opts1);
- opts = opts1 = opts2;
- } else
- opts = "ro";
- if (types && !strcmp(types, "guess"))
- types = 0;
- error (_("mount: %s%s is write-protected, mounting read-only"),
- bd, spec0);
- res = try_mount_one (spec0, node0, types, opts, freq, pass, 1);
- goto out;
- }
- break;
- }
- case ENOMEDIUM:
- error(_("mount: no medium found on %s"), spec);
- break;
- default:
- error ("mount: %s", strerror (mnt_err)); break;
- }
- }
- res = EX_FAIL;
-
- out:
-
-#if defined(HAVE_LIBSELINUX) && defined(HAVE_SECURITY_GET_INITIAL_CONTEXT)
- if (res != EX_FAIL && verbose && is_selinux_enabled() > 0) {
- security_context_t raw = NULL, def = NULL;
-
- if (getfilecon(node, &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"),
- node);
- }
- freecon(raw);
- freecon(def);
- }
-#endif
-
- my_free(mount_opts);
- my_free(extra_opts);
- my_free(spec1);
- my_free(node1);
- my_free(opts1);
- my_free(types1);
-
- return res;
-}
-
-static char *
-subst_string(const char *s, const char *sub, int sublen, const char *repl) {
- char *n;
-
- n = (char *) xmalloc(strlen(s)-sublen+strlen(repl)+1);
- strncpy (n, s, sub-s);
- strcpy (n + (sub-s), repl);
- strcat (n, sub+sublen);
- return n;
-}
-
-static char *
-usersubst(const char *opts) {
- char *s, *w;
- char id[40];
-
- if (!opts)
- return NULL;
-
- s = "uid=useruid";
- if (opts && (w = strstr(opts, s)) != NULL) {
- sprintf(id, "uid=%u", getuid());
- opts = subst_string(opts, w, strlen(s), id);
- }
- s = "gid=usergid";
- if (opts && (w = strstr(opts, s)) != NULL) {
- sprintf(id, "gid=%u", getgid());
- opts = subst_string(opts, w, strlen(s), id);
- }
- return xstrdup(opts);
-}
-
-static int
-is_existing_file (const char *s) {
- struct stat statbuf;
-
- return (stat(s, &statbuf) == 0);
-}
-
-/*
- * Return 0 for success (either mounted sth or -a and NOAUTO was given)
- */
-static int
-mount_one (const char *spec, const char *node, const char *types,
- const char *fstabopts, char *cmdlineopts, int freq, int pass) {
- const char *nspec = NULL;
- char *opts;
-
- /* Substitute values in opts, if required */
- opts = usersubst(fstabopts);
-
- /* Merge the fstab and command line options. */
- opts = append_opt(opts, cmdlineopts, NULL);
-
- if (types == NULL && !mounttype && !is_existing_file(spec)) {
- if (strchr (spec, ':') != NULL) {
- types = "nfs";
- if (verbose)
- printf(_("mount: no type was given - "
- "I'll assume nfs because of "
- "the colon\n"));
- } else if(!strncmp(spec, "//", 2)) {
- types = "cifs";
- if (verbose)
- printf(_("mount: no type was given - "
- "I'll assume cifs because of "
- "the // prefix\n"));
- }
- }
-
- /* Handle possible LABEL= and UUID= forms of spec */
- if (types == NULL || (strncmp(types, "9p", 2) &&
- strncmp(types, "nfs", 3) &&
- strncmp(types, "cifs", 4) &&
- strncmp(types, "smbfs", 5))) {
- if (!is_pseudo_fs(types))
- nspec = spec_to_devname(spec);
- if (nspec)
- spec = nspec;
- }
-
- return try_mount_one (spec, node, types, opts, freq, pass, 0);
-}
-
-static int
-mounted (const char *spec0, const char *node0,
- struct mntentchn *fstab_mc __attribute__((__unused__))) {
-
- struct mntentchn *mc, *mc0;
- const char *spec, *node;
- int ret = 0;
-
- /* Handle possible UUID= and LABEL= in spec */
- spec = spec_to_devname(spec0);
- if (!spec)
- return ret;
-
- node = canonicalize(node0);
-
-
- mc0 = mtab_head();
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt)
- if (streq (spec, mc->m.mnt_fsname) &&
- streq (node, mc->m.mnt_dir)) {
- ret = 1;
- break;
- }
-
- my_free(spec);
- my_free(node);
-
- return ret;
-}
-
-/* returns 0 if not mounted, 1 if mounted and -1 in case of error */
-static int
-is_fstab_entry_mounted(struct mntentchn *mc, int verbose)
-{
- struct stat st;
-
- if (mounted(mc->m.mnt_fsname, mc->m.mnt_dir, mc))
- goto yes;
-
- /* extra care for loop devices */
- if ((mc->m.mnt_opts && strstr(mc->m.mnt_opts, "loop=")) ||
- (stat(mc->m.mnt_fsname, &st) == 0 && S_ISREG(st.st_mode))) {
-
- char *p = get_option_value(mc->m.mnt_opts, "offset=");
- uintmax_t offset = 0;
-
- if (p && strtosize(p, &offset) != 0) {
- if (verbose)
- printf(_("mount: ignore %s "
- "(unparsable offset= option)\n"),
- mc->m.mnt_fsname);
- return -1;
- }
- free(p);
- if (is_mounted_same_loopfile(mc->m.mnt_dir, mc->m.mnt_fsname, offset))
- goto yes;
- }
-
- return 0;
-yes:
- if (verbose)
- printf(_("mount: %s already mounted on %s\n"),
- mc->m.mnt_fsname, mc->m.mnt_dir);
- return 1;
-}
-
-/* avoid using stat() on things we are not going to mount anyway.. */
-static int
-has_noauto (const char *opts) {
- char *s;
-
- if (!opts)
- return 0;
- s = strstr(opts, "noauto");
- if (!s)
- return 0;
- return (s == opts || s[-1] == ',') && (s[6] == 0 || s[6] == ',');
-}
-
-/* Mount all filesystems of the specified types except swap and root. */
-/* With the --fork option: fork and let different incarnations of
- mount handle different filesystems. However, try to avoid several
- simultaneous mounts on the same physical disk, since that is very slow. */
-#define DISKMAJOR(m) (((int) m) & ~0xf)
-
-static int
-do_mount_all (char *types, char *options, char *test_opts) {
- struct mntentchn *mc, *mc0, *mtmp;
- int status = 0;
- struct stat statbuf;
- struct child {
- pid_t pid;
- char *group;
- struct mntentchn *mec;
- struct mntentchn *meclast;
- struct child *nxt;
- } childhead, *childtail, *cp;
- char major[22];
- char *g, *colon;
-
- /* build a chain of what we have to do, or maybe
- several chains, one for each major or NFS host */
- childhead.nxt = 0;
- childtail = &childhead;
- mc0 = fstab_head();
- for (mc = mc0->nxt; mc && mc != mc0; mc = mc->nxt) {
- if (has_noauto (mc->m.mnt_opts))
- continue;
- if (matching_type (mc->m.mnt_type, types)
- && matching_opts (mc->m.mnt_opts, test_opts)
- && !streq (mc->m.mnt_dir, "/")
- && !streq (mc->m.mnt_dir, "root")
- && !is_fstab_entry_mounted(mc, verbose)) {
-
- mtmp = (struct mntentchn *) xmalloc(sizeof(*mtmp));
- *mtmp = *mc;
- mtmp->nxt = 0;
- g = NULL;
- if (optfork) {
- if (stat(mc->m.mnt_fsname, &statbuf) == 0 &&
- S_ISBLK(statbuf.st_mode)) {
- sprintf(major, "#%x",
- DISKMAJOR(statbuf.st_rdev));
- g = major;
- }
- if (strcmp(mc->m.mnt_type, "nfs") == 0) {
- g = xstrdup(mc->m.mnt_fsname);
- colon = strchr(g, ':');
- if (colon)
- *colon = '\0';
- }
- }
- if (g) {
- for (cp = childhead.nxt; cp; cp = cp->nxt)
- if (cp->group &&
- strcmp(cp->group, g) == 0) {
- cp->meclast->nxt = mtmp;
- cp->meclast = mtmp;
- goto fnd;
- }
- }
- cp = (struct child *) xmalloc(sizeof *cp);
- cp->nxt = 0;
- cp->mec = cp->meclast = mtmp;
- cp->group = xstrdup(g);
- cp->pid = 0;
- childtail->nxt = cp;
- childtail = cp;
- fnd:;
-
- }
- }
-
- /* now do everything */
- for (cp = childhead.nxt; cp; cp = cp->nxt) {
- pid_t p = -1;
- if (optfork) {
- p = fork();
- if (p == -1) {
- int errsv = errno;
- error(_("mount: cannot fork: %s"),
- strerror (errsv));
- }
- else if (p != 0)
- cp->pid = p;
- }
-
- /* if child, or not forked, do the mounting */
- if (p == 0 || p == -1) {
- for (mc = cp->mec; mc; mc = mc->nxt) {
- status |= mount_one (mc->m.mnt_fsname,
- mc->m.mnt_dir,
- mc->m.mnt_type,
- mc->m.mnt_opts,
- options, 0, 0);
- }
- if (mountcount)
- status |= EX_SOMEOK;
- if (p == 0)
- exit(status);
- }
- }
-
- /* wait for children, if any */
- while ((cp = childhead.nxt) != NULL) {
- childhead.nxt = cp->nxt;
- if (cp->pid) {
- int ret;
- keep_waiting:
- if(waitpid(cp->pid, &ret, 0) == -1) {
- if (errno == EINTR)
- goto keep_waiting;
- perror("waitpid");
- } else if (WIFEXITED(ret))
- status |= WEXITSTATUS(ret);
- else
- status |= EX_SYSERR;
- }
- }
- if (mountcount)
- status |= EX_SOMEOK;
- return status;
-}
-
-static struct option longopts[] = {
- { "all", 0, 0, 'a' },
- { "fake", 0, 0, 'f' },
- { "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' },
- { "bind", 0, 0, 'B' },
- { "move", 0, 0, 'M' },
- { "rbind", 0, 0, 'R' },
- { "make-shared", 0, 0, 136 },
- { "make-slave", 0, 0, 137 },
- { "make-private", 0, 0, 138 },
- { "make-unbindable", 0, 0, 139 },
- { "make-rshared", 0, 0, 140 },
- { "make-rslave", 0, 0, 141 },
- { "make-rprivate", 0, 0, 142 },
- { "make-runbindable", 0, 0, 143 },
- { "no-canonicalize", 0, 0, 144 },
- { "internal-only", 0, 0, 'i' },
- { NULL, 0, 0, 0 }
-};
-
-/* Keep the usage message at max 22 lines, each at most 70 chars long.
- The user should not need a pager to read it. */
-static void
-usage (FILE *fp, int n) {
- fprintf(fp, _(
- "Usage: mount -V : print version\n"
- " mount -h : print this help\n"
- " mount : list mounted filesystems\n"
- " mount -l : idem, including volume labels\n"
- "So far the informational part. Next the mounting.\n"
- "The command is `mount [-t fstype] something somewhere'.\n"
- "Details found in /etc/fstab may be omitted.\n"
- " mount -a [-t|-O] ... : mount all stuff from /etc/fstab\n"
- " mount device : mount device at the known place\n"
- " mount directory : mount known device here\n"
- " mount -t type dev dir : ordinary mount command\n"
- "Note that one does not really mount a device, one mounts\n"
- "a filesystem (of the given type) found on the device.\n"
- "One can also mount an already visible directory tree elsewhere:\n"
- " mount --bind olddir newdir\n"
- "or move a subtree:\n"
- " mount --move olddir newdir\n"
- "One can change the type of mount containing the directory dir:\n"
- " mount --make-shared dir\n"
- " mount --make-slave dir\n"
- " mount --make-private dir\n"
- " mount --make-unbindable dir\n"
- "One can change the type of all the mounts in a mount subtree\n"
- "containing the directory dir:\n"
- " mount --make-rshared dir\n"
- " mount --make-rslave dir\n"
- " mount --make-rprivate dir\n"
- " mount --make-runbindable dir\n"
- "A device can be given by name, say /dev/hda1 or /dev/cdrom,\n"
- "or by label, using -L label or by uuid, using -U uuid .\n"
- "Other options: [-nfFrsvw] [-o options] [-p passwdfd].\n"
- "For many more details, say man 8 mount .\n"
- ));
-
- unlock_mtab();
- exit (n);
-}
-
-/* returns mount entry from fstab */
-static struct mntentchn *
-getfs(const char *spec, const char *uuid, const char *label)
-{
- struct mntentchn *mc = NULL;
- const char *devname = NULL;
-
- if (!spec && !uuid && !label)
- return NULL;
-
- /*
- * A) 99% of all cases, the spec on cmdline matches
- * with spec in fstab
- */
- if (uuid)
- mc = getfs_by_uuid(uuid);
- else if (label)
- mc = getfs_by_label(label);
- else {
- mc = getfs_by_dir(spec);
-
- if (!mc)
- mc = getfs_by_spec(spec);
- }
- if (mc)
- return mc;
-
- /*
- * B) UUID or LABEL on cmdline, but devname in fstab
- */
- if (uuid)
- devname = fsprobe_get_devname_by_uuid(uuid);
- else if (label)
- devname = fsprobe_get_devname_by_label(label);
- else
- devname = spec_to_devname(spec);
-
- if (devname)
- mc = getfs_by_devname(devname);
-
- /*
- * C) mixed
- */
- if (!mc && devname) {
- const char *id = NULL;
-
- if (!label && (!spec || strncmp(spec, "LABEL=", 6))) {
- id = fsprobe_get_label_by_devname(devname);
- if (id)
- mc = getfs_by_label(id);
- }
- if (!mc && !uuid && (!spec || strncmp(spec, "UUID=", 5))) {
- id = fsprobe_get_uuid_by_devname(devname);
- if (id)
- mc = getfs_by_uuid(id);
- }
- my_free(id);
-
- if (mc) {
- /* use real device name to avoid repetitional
- * conversion from LABEL/UUID to devname
- */
- my_free(mc->m.mnt_fsname);
- mc->m.mnt_fsname = xstrdup(devname);
- }
- }
-
- /*
- * D) remount -- try /etc/mtab
- * Earlier mtab was tried first, but this would sometimes try the
- * wrong mount in case mtab had the root device entry wrong. Try
- * the last occurrence first, since that is the visible mount.
- */
- if (!mc && (devname || spec))
- mc = getmntfilebackward (devname ? devname : spec, NULL);
-
- my_free(devname);
- return mc;
-}
-
-
-static void
-print_version(int rc) {
- printf( "mount from %s (with "
-#ifdef HAVE_LIBBLKID
- "libblkid"
-#else
- "libvolume_id"
-#endif
-#ifdef HAVE_LIBSELINUX
- " and selinux"
-#endif
- " support)\n", PACKAGE_STRING);
- exit(rc);
-}
-
-int
-main(int argc, char *argv[]) {
- int c, result = 0, specseen;
- char *options = NULL, *test_opts = NULL, *node;
- const char *spec = NULL;
- char *label = NULL;
- char *uuid = NULL;
- char *types = NULL;
- char *p;
- struct mntentchn *mc;
- int fd;
-
- sanitize_env();
- setlocale(LC_ALL, "");
- bindtextdomain(PACKAGE, LOCALEDIR);
- textdomain(PACKAGE);
- atexit(close_stdout);
-
- progname = argv[0];
- if ((p = strrchr(progname, '/')) != NULL)
- progname = p+1;
-
- umask(022);
-
- /* People report that a mount called from init without console
- writes error messages to /etc/mtab
- Let us try to avoid getting fd's 0,1,2 */
- while((fd = open("/dev/null", O_RDWR)) == 0 || fd == 1 || fd == 2) ;
- if (fd > 2)
- close(fd);
-
- fsprobe_init();
-
-#ifdef DO_PS_FIDDLING
- initproctitle(argc, argv);
-#endif
-
- while ((c = getopt_long (argc, argv, "aBfFhilL:Mno:O:p:rRsU:vVwt:",
- longopts, NULL)) != -1) {
- switch (c) {
- case 'a': /* mount everything in fstab */
- ++mount_all;
- break;
- case 'B': /* bind */
- mounttype = MS_BIND;
- break;
- case 'f': /* fake: don't actually call mount(2) */
- ++fake;
- break;
- case 'F':
- ++optfork;
- break;
- case 'h': /* help */
- usage (stdout, 0);
- break;
- case 'i':
- external_allowed = 0;
- break;
- case 'l':
- list_with_volumelabel = 1;
- break;
- case 'L':
- label = optarg;
- break;
- case 'M': /* move */
- mounttype = MS_MOVE;
- break;
- case 'n': /* do not write /etc/mtab */
- ++nomtab;
- break;
- case 'o': /* specify mount options */
- options = append_opt(options, optarg, NULL);
- break;
- case 'O': /* with -t: mount only if (not) opt */
- test_opts = append_opt(test_opts, optarg, NULL);
- break;
- case 'p': /* fd on which to read passwd */
- error("mount: %s", _("--pass-fd is no longer supported"));
- break;
- case 'r': /* mount readonly */
- readonly = 1;
- readwrite = 0;
- break;
- case 'R': /* rbind */
- mounttype = (MS_BIND | MS_REC);
- break;
- case 's': /* allow sloppy mount options */
- sloppy = 1;
- break;
- case 't': /* specify file system types */
- types = optarg;
- break;
- case 'U':
- uuid = optarg;
- break;
- case 'v': /* be chatty - more so if repeated */
- ++verbose;
- break;
- case 'V': /* version */
- print_version(EXIT_SUCCESS);
- break;
- case 'w': /* mount read/write */
- readwrite = 1;
- readonly = 0;
- break;
- case 0:
- break;
-
- case 136:
- mounttype = MS_SHARED;
- break;
-
- case 137:
- mounttype = MS_SLAVE;
- break;
-
- case 138:
- mounttype = MS_PRIVATE;
- break;
-
- case 139:
- mounttype = MS_UNBINDABLE;
- break;
-
- case 140:
- mounttype = (MS_SHARED | MS_REC);
- break;
-
- case 141:
- mounttype = (MS_SLAVE | MS_REC);
- break;
-
- case 142:
- mounttype = (MS_PRIVATE | MS_REC);
- break;
-
- case 143:
- mounttype = (MS_UNBINDABLE | MS_REC);
- break;
- case 144:
- nocanonicalize = 1;
- break;
- case '?':
- default:
- usage (stderr, EX_USAGE);
- }
- }
-
- if (verbose > 2) {
- printf("mount: fstab path: \"%s\"\n", _PATH_MNTTAB);
- printf("mount: mtab path: \"%s\"\n", _PATH_MOUNTED);
- printf("mount: lock path: \"%s\"\n", _PATH_MOUNTED_LOCK);
- printf("mount: temp path: \"%s\"\n", _PATH_MOUNTED_TMP);
- printf("mount: UID: %u\n", getuid());
- printf("mount: eUID: %u\n", geteuid());
- }
-
- argc -= optind;
- argv += optind;
-
- specseen = (uuid || label) ? 1 : 0; /* yes, .. i know */
-
- if (argc+specseen == 0 && !mount_all) {
- if (options || mounttype)
- usage (stderr, EX_USAGE);
- return print_all (types);
- }
-
- {
- const uid_t ruid = getuid();
- const uid_t euid = geteuid();
-
- /* if we're really root and aren't running setuid */
- if (((uid_t)0 == ruid) && (ruid == euid)) {
- restricted = 0;
- }
-
- if (restricted &&
- (types || options || readwrite || nomtab || mount_all ||
- nocanonicalize || fake || mounttype ||
- (argc + specseen) != 1)) {
-
- if (ruid == 0 && euid != 0)
- /* user is root, but setuid to non-root */
- die (EX_USAGE, _("mount: only root can do that "
- "(effective UID is %u)"), euid);
-
- die (EX_USAGE, _("mount: only root can do that"));
- }
- }
-
- atexit(unlock_mtab);
-
- switch (argc+specseen) {
- case 0:
- /* mount -a */
- result = do_mount_all (types, options, test_opts);
- if (result == 0 && verbose && !fake)
- error(_("nothing was mounted"));
- break;
-
- case 1:
- /* mount [-nfrvw] [-o options] special | node
- * mount -L label (or -U uuid)
- * (/etc/fstab is necessary)
- */
- if (types != NULL)
- usage (stderr, EX_USAGE);
-
- if (uuid || label)
- mc = getfs(NULL, uuid, label);
- else
- mc = getfs(*argv, NULL, NULL);
-
- if (!mc) {
- if (uuid || label)
- die (EX_USAGE, _("mount: no such partition found"));
-
- die (EX_USAGE,
- _("mount: can't find %s in %s or %s"),
- *argv, _PATH_MNTTAB, _PATH_MOUNTED);
- }
-
- result = mount_one (xstrdup (mc->m.mnt_fsname),
- xstrdup (mc->m.mnt_dir),
- xstrdup (mc->m.mnt_type),
- mc->m.mnt_opts, options, 0, 0);
- break;
-
- case 2:
- /* mount special node (/etc/fstab is not necessary) */
- if (specseen) {
- /* mount -L label node (or -U uuid) */
- spec = uuid ? fsprobe_get_devname_by_uuid(uuid) :
- fsprobe_get_devname_by_label(label);
- node = argv[0];
- } else {
- /* mount special node */
- spec = argv[0];
- node = argv[1];
- }
- if (!spec)
- die (EX_USAGE, _("mount: no such partition found"));
-
- result = mount_one (spec, node, types, NULL, options, 0, 0);
- break;
-
- default:
- usage (stderr, EX_USAGE);
- }
-
- if (result == EX_SOMEOK)
- result = 0;
-
- fsprobe_exit();
-
- exit (result);
-}
+++ /dev/null
-#ifndef MS_RDONLY
-#define MS_RDONLY 1 /* Mount read-only */
-#endif
-#ifndef MS_NOSUID
-#define MS_NOSUID 2 /* Ignore suid and sgid bits */
-#endif
-#ifndef MS_NODEV
-#define MS_NODEV 4 /* Disallow access to device special files */
-#endif
-#ifndef MS_NOEXEC
-#define MS_NOEXEC 8 /* Disallow program execution */
-#endif
-#ifndef MS_SYNCHRONOUS
-#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
-#endif
-#ifndef MS_REMOUNT
-#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
-#endif
-#ifndef MS_MANDLOCK
-#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
-#endif
-#ifndef MS_DIRSYNC
-#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
-#endif
-#ifndef MS_NOATIME
-#define MS_NOATIME 0x400 /* 1024: Do not update access times. */
-#endif
-#ifndef MS_NODIRATIME
-#define MS_NODIRATIME 0x800 /* 2048: Don't update directory access times */
-#endif
-#ifndef MS_BIND
-#define MS_BIND 0x1000 /* 4096: Mount existing tree also elsewhere */
-#endif
-#ifndef MS_MOVE
-#define MS_MOVE 0x2000 /* 8192: Atomically move tree */
-#endif
-#ifndef MS_REC
-#define MS_REC 0x4000 /* 16384: Recursive loopback */
-#endif
-#ifndef MS_SILENT
-#define MS_SILENT 0x8000 /* 32768 (was MS_VERBOSE) */
-#endif
-#ifndef MS_RELATIME
-#define MS_RELATIME 0x200000 /* 200000: Update access times relative
- to mtime/ctime */
-#endif
-#ifndef MS_UNBINDABLE
-#define MS_UNBINDABLE (1<<17) /* 131072 unbindable*/
-#endif
-#ifndef MS_PRIVATE
-#define MS_PRIVATE (1<<18) /* 262144 Private*/
-#endif
-#ifndef MS_SLAVE
-#define MS_SLAVE (1<<19) /* 524288 Slave*/
-#endif
-#ifndef MS_SHARED
-#define MS_SHARED (1<<20) /* 1048576 Shared*/
-#endif
-#ifndef MS_I_VERSION
-#define MS_I_VERSION (1<<23) /* update inode I_version field */
-#endif
-#ifndef MS_STRICTATIME
-#define MS_STRICTATIME (1<<24) /* strict atime semantics */
-#endif
-/*
- * Magic mount flag number. Had to be or-ed to the flag values.
- */
-#ifndef MS_MGC_VAL
-#define MS_MGC_VAL 0xC0ED0000 /* magic flag number to indicate "new" flags */
-#endif
-#ifndef MS_MGC_MSK
-#define MS_MGC_MSK 0xffff0000 /* magic flag number mask */
-#endif
+++ /dev/null
-/* Private version of the libc *mntent() routines. */
-/* Note slightly different prototypes. */
-
-/* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
- * - added Native Language Support
- */
-
-#include <stdio.h>
-#include <string.h> /* for index */
-#include <ctype.h> /* for isdigit */
-#include <sys/stat.h> /* for umask */
-
-#include "mount_mntent.h"
-#include "sundries.h" /* for xmalloc */
-#include "nls.h"
-#include "mangle.h"
-#include "closestream.h"
-
-static int
-is_space_or_tab (char c) {
- return (c == ' ' || c == '\t');
-}
-
-static char *
-skip_spaces(char *s) {
- while (is_space_or_tab(*s))
- s++;
- return s;
-}
-
-/*
- * fstat'ing the file and allocating a buffer holding all of it
- * may be a bad idea: if the file is /proc/mounts, the stat
- * returns 0.
- * (On the other hand, mangling and unmangling is meaningless
- * for /proc/mounts.)
- */
-
-mntFILE *
-my_setmntent (const char *file, char *mode) {
- mntFILE *mfp = xmalloc(sizeof(*mfp));
- mode_t old_umask = umask(077);
-
- mfp->mntent_fp = fopen(file, mode);
- umask(old_umask);
- mfp->mntent_file = xstrdup(file);
- mfp->mntent_errs = (mfp->mntent_fp == NULL);
- mfp->mntent_softerrs = 0;
- mfp->mntent_lineno = 0;
- return mfp;
-}
-
-void
-my_endmntent(mntFILE * mfp) {
- if (mfp) {
- if (mfp->mntent_fp)
- if (close_stream(mfp->mntent_fp))
- fprintf(stderr, _("write error"));
- free(mfp->mntent_file);
- free(mfp);
- }
-}
-
-int
-my_addmntent (mntFILE *mfp, struct my_mntent *mnt) {
- char *m1, *m2, *m3, *m4;
- int res;
-
- if (fseek (mfp->mntent_fp, 0, SEEK_END))
- return 1; /* failure */
-
- m1 = mangle(mnt->mnt_fsname);
- m2 = mangle(mnt->mnt_dir);
- m3 = mangle(mnt->mnt_type);
- m4 = mnt->mnt_opts ? mangle(mnt->mnt_opts) : "rw";
-
- res = fprintf (mfp->mntent_fp, "%s %s %s %s %d %d\n",
- m1, m2, m3, m4, mnt->mnt_freq, mnt->mnt_passno);
-
- free(m1);
- free(m2);
- free(m3);
- if (mnt->mnt_opts)
- free(m4);
- return (res < 0) ? 1 : 0;
-}
-
-/* Read the next entry from the file fp. Stop reading at an incorrect entry. */
-struct my_mntent *
-my_getmntent (mntFILE *mfp) {
- static char buf[4096];
- static struct my_mntent me;
- char *s;
-
- again:
- if (mfp->mntent_errs || mfp->mntent_softerrs >= ERR_MAX)
- return NULL;
-
- /* read the next non-blank non-comment line */
- do {
- if (fgets (buf, sizeof(buf), mfp->mntent_fp) == NULL)
- return NULL;
-
- mfp->mntent_lineno++;
- s = strchr (buf, '\n');
- if (s == NULL) {
- /* Missing final newline? Otherwise extremely */
- /* long line - assume file was corrupted */
- if (feof(mfp->mntent_fp)) {
- fprintf(stderr, _("[mntent]: warning: no final "
- "newline at the end of %s\n"),
- mfp->mntent_file);
- s = strchr (buf, 0);
- } else {
- mfp->mntent_errs = 1;
- goto err;
- }
- }
- *s = 0;
- if (--s >= buf && *s == '\r')
- *s = 0;
- s = skip_spaces(buf);
- } while (*s == '\0' || *s == '#');
-
- me.mnt_fsname = unmangle(s, &s);
- s = skip_spaces(s);
- me.mnt_dir = unmangle(s, &s);
- s = skip_spaces(s);
- me.mnt_type = unmangle(s, &s);
- s = skip_spaces(s);
- me.mnt_opts = unmangle(s, &s);
- s = skip_spaces(s);
-
- if (!me.mnt_fsname || !me.mnt_dir || !me.mnt_type)
- goto err;
-
- if (isdigit(*s)) {
- me.mnt_freq = atoi(s);
- while(isdigit(*s)) s++;
- } else
- me.mnt_freq = 0;
- if(*s && !is_space_or_tab(*s))
- goto err;
-
- s = skip_spaces(s);
- if(isdigit(*s)) {
- me.mnt_passno = atoi(s);
- while(isdigit(*s)) s++;
- } else
- me.mnt_passno = 0;
- if(*s && !is_space_or_tab(*s))
- goto err;
-
- /* allow more stuff, e.g. comments, on this line */
-
- return &me;
-
- err:
- mfp->mntent_softerrs++;
- fprintf(stderr, _("[mntent]: line %d in %s is bad%s\n"),
- mfp->mntent_lineno, mfp->mntent_file,
- (mfp->mntent_errs || mfp->mntent_softerrs >= ERR_MAX) ?
- _("; rest of file ignored") : "");
- goto again;
-}
+++ /dev/null
-#ifndef MOUNT_MNTENT_H
-#define MOUNT_MNTENT_H
-
-struct my_mntent {
- const char *mnt_fsname;
- const char *mnt_dir;
- const char *mnt_type;
- const char *mnt_opts;
- int mnt_freq;
- int mnt_passno;
-};
-
-#define ERR_MAX 5
-
-typedef struct mntFILEstruct {
- FILE *mntent_fp;
- char *mntent_file;
- int mntent_lineno;
- int mntent_errs;
- int mntent_softerrs;
-} mntFILE;
-
-mntFILE *my_setmntent (const char *file, char *mode);
-void my_endmntent (mntFILE *mfp);
-int my_addmntent (mntFILE *mfp, struct my_mntent *mnt);
-struct my_mntent *my_getmntent (mntFILE *mfp);
-
-#endif /* MOUNT_MNTENT_H */
+++ /dev/null
-/*
- * Support functions. Exported functions are prototyped in sundries.h.
- *
- * added fcntl locking by Kjetil T. (kjetilho@math.uio.no) - aeb, 950927
- *
- * 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
- * - added Native Language Support
- *
- */
-#include <unistd.h>
-#include <stdio.h>
-#include <string.h>
-#include <mntent.h> /* for MNTTYPE_SWAP */
-
-#include "canonicalize.h"
-
-#include "sundries.h"
-#include "nls.h"
-
-int mount_quiet;
-int verbose;
-int nocanonicalize;
-char *progname;
-
-/* reallocates its first arg - typical use: s = xstrconcat3(s,t,u); */
-char *
-xstrconcat3 (char *s, const char *t, const char *u) {
- size_t len = 0;
-
- len = (s ? strlen(s) : 0) + (t ? strlen(t) : 0) + (u ? strlen(u) : 0);
-
- if (!len)
- return NULL;
- if (!s) {
- s = xmalloc(len + 1);
- *s = '\0';
- }
- else
- s = xrealloc(s, len + 1);
- if (t)
- strcat(s, t);
- if (u)
- strcat(s, u);
- return s;
-}
-
-/* frees its first arg - typical use: s = xstrconcat4(s,t,u,v); */
-char *
-xstrconcat4 (char *s, const char *t, const char *u, const char *v) {
- size_t len = 0;
-
- len = (s ? strlen(s) : 0) + (t ? strlen(t) : 0) +
- (u ? strlen(u) : 0) + (v ? strlen(v) : 0);
-
- if (!len)
- return NULL;
- if (!s) {
- s = xmalloc(len + 1);
- *s = '\0';
- }
- else
- s = xrealloc(s, len + 1);
- if (t)
- strcat(s, t);
- if (u)
- strcat(s, u);
- if (v)
- strcat(s, v);
- return s;
-
-
-}
-
-/* Call this with SIG_BLOCK to block and SIG_UNBLOCK to unblock. */
-void
-block_signals (int how) {
- sigset_t sigs;
-
- sigfillset (&sigs);
- sigdelset(&sigs, SIGTRAP);
- sigdelset(&sigs, SIGSEGV);
- sigprocmask (how, &sigs, (sigset_t *) 0);
-}
-
-
-/* Non-fatal error. Print message and return. */
-/* (print the message in a single printf, in an attempt
- to avoid mixing output of several threads) */
-void
-error (const char *fmt, ...) {
- va_list args;
-
- if (mount_quiet)
- return;
- va_start (args, fmt);
- vfprintf (stderr, fmt, args);
- va_end (args);
- fputc('\n', stderr);
-}
-
-/* Fatal error. Print message and exit. */
-void __attribute__ ((noreturn)) die(int err, const char *fmt, ...)
-{
- va_list args;
-
- va_start(args, fmt);
- vfprintf(stderr, fmt, args);
- fprintf(stderr, "\n");
- va_end(args);
-
- exit(err);
-}
-
-/* True if fstypes match. Null *TYPES means match anything,
- except that swap types always return false. */
-/* Accept nonfs,proc,devpts and nonfs,noproc,nodevpts
- with the same meaning. */
-int
-matching_type (const char *type, const char *types) {
- int no; /* negated types list */
- int len;
- const char *p;
-
- if (streq (type, MNTTYPE_SWAP))
- return 0;
- if (types == NULL)
- return 1;
-
- no = 0;
- if (!strncmp(types, "no", 2)) {
- no = 1;
- types += 2;
- }
-
- /* Does type occur in types, separated by commas? */
- len = strlen(type);
- p = types;
- while(1) {
- if (!strncmp(p, "no", 2) && !strncmp(p+2, type, len) &&
- (p[len+2] == 0 || p[len+2] == ','))
- return 0;
- if (strncmp(p, type, len) == 0 &&
- (p[len] == 0 || p[len] == ','))
- return !no;
- p = strchr(p,',');
- if (!p)
- break;
- p++;
- }
- return no;
-}
-
-/* Returns 1 if needle found or noneedle not found in haystack
- * Otherwise returns 0
- */
-static int
-check_option(const char *haystack, const char *needle) {
- const char *p, *r;
- int len, needle_len, this_len;
- int no;
-
- no = 0;
- if (!strncmp(needle, "no", 2)) {
- no = 1;
- needle += 2;
- }
- needle_len = strlen(needle);
- len = strlen(haystack);
-
- for (p = haystack; p < haystack+len; p++) {
- r = strchr(p, ',');
- if (r) {
- this_len = r-p;
- } else {
- this_len = strlen(p);
- }
- if (this_len != needle_len) {
- p += this_len;
- continue;
- }
- if (strncmp(p, needle, this_len) == 0)
- return !no; /* foo or nofoo was found */
- p += this_len;
- }
-
- return no; /* foo or nofoo was not found */
-}
-
-
-/* Returns 1 if each of the test_opts options agrees with the entire
- * list of options.
- * Returns 0 if any noopt is found in test_opts and opt is found in options.
- * Returns 0 if any opt is found in test_opts but is not found in options.
- * Unlike fs type matching, nonetdev,user and nonetdev,nouser have
- * DIFFERENT meanings; each option is matched explicitly as specified.
- */
-int
-matching_opts (const char *options, const char *test_opts) {
- const char *p, *r;
- char *q;
- int len, this_len;
-
- if (test_opts == NULL)
- return 1;
- if (options == NULL)
- options = "";
-
- len = strlen(test_opts);
- q = alloca(len+1);
- if (q == NULL)
- die (EX_SYSERR, _("not enough memory"));
-
- for (p = test_opts; p < test_opts+len; p++) {
- r = strchr(p, ',');
- if (r) {
- this_len = r-p;
- } else {
- this_len = strlen(p);
- }
- if (!this_len) continue; /* if two ',' appear in a row */
- strncpy(q, p, this_len);
- q[this_len] = '\0';
- if (!check_option(options, q))
- return 0; /* any match failure means failure */
- p += this_len;
- }
-
- /* no match failures in list means success */
- return 1;
-}
-
-int
-is_pseudo_fs(const char *type)
-{
- if (type == NULL || *type == '/')
- return 0;
- if (streq(type, "none") ||
- streq(type, "proc") ||
- streq(type, "tmpfs") ||
- streq(type, "sysfs") ||
- streq(type, "usbfs") ||
- streq(type, "cgroup") ||
- streq(type, "cpuset") ||
- streq(type, "rpc_pipefs") ||
- streq(type, "devpts") ||
- streq(type, "securityfs") ||
- streq(type, "debugfs"))
- return 1;
- return 0;
-}
-
-/* Make a canonical pathname from PATH. Returns a freshly malloced string.
- It is up the *caller* to ensure that the PATH is sensible. i.e.
- canonicalize ("/dev/fd0/.") returns "/dev/fd0" even though ``/dev/fd0/.''
- is not a legal pathname for ``/dev/fd0''. Anything we cannot parse
- we return unmodified. */
-char *
-canonicalize_spec (const char *path)
-{
- char *res;
-
- if (!path)
- return NULL;
- if (nocanonicalize || is_pseudo_fs(path))
- return xstrdup(path);
-
- res = canonicalize_path(path);
- if (!res)
- die(EX_SYSERR, _("not enough memory"));
- return res;
-}
-
-char *canonicalize (const char *path)
-{
- char *res;
-
- if (!path)
- return NULL;
- else if (nocanonicalize)
- return xstrdup(path);
-
- res = canonicalize_path(path);
- if (!res)
- die(EX_SYSERR, _("not enough memory"));
- return res;
-}
+++ /dev/null
-/*
- * sundries.h
- * Support function prototypes. Functions are in sundries.c.
- */
-#ifndef SUNDRIES_H
-#define SUNDRIES_H
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <stdlib.h>
-
-#define XALLOC_EXIT_CODE 2 /* same as EX_SYSERR, for backwards compatibility */
-#include "xalloc.h"
-
-/* global mount, umount, and losetup variables */
-extern int mount_quiet;
-extern int verbose;
-extern int nocanonicalize;
-extern char *progname;
-
-#define streq(s, t) (strcmp ((s), (t)) == 0)
-#define my_free(_p) free((void *) _p)
-
-void block_signals (int how);
-
-void error (const char *fmt, ...)
- __attribute__ ((__format__ (__printf__, 1, 2)));
-void die(int err, const char *fmt, ...)
- __attribute__ ((__format__ (__printf__, 2, 3)));
-
-int matching_type (const char *type, const char *types);
-int matching_opts (const char *options, const char *test_opts);
-char *xstrconcat3 (char *, const char *, const char *);
-char *xstrconcat4 (char *, const char *, const char *, const char *);
-
-int is_pseudo_fs(const char *type);
-
-char *canonicalize (const char *path);
-char *canonicalize_spec (const char *path);
-
-/* exit status - bits below are ORed */
-#define EX_USAGE 1 /* incorrect invocation or permission */
-#define EX_SYSERR 2 /* out of memory, cannot fork, ... */
-#define EX_SOFTWARE 4 /* internal mount bug or wrong version */
-#define EX_USER 8 /* user interrupt */
-#define EX_FILEIO 16 /* problems writing, locking, ... mtab/fstab */
-#define EX_FAIL 32 /* mount failure */
-#define EX_SOMEOK 64 /* some mount succeeded */
-
-#endif /* SUNDRIES_H */
+++ /dev/null
-.\" Copyright (c) 1996 Andries Brouwer
-.\" This page is somewhat derived from a page that was
-.\" (c) 1980, 1989, 1991 The Regents of the University of California
-.\" and had been heavily modified by Rik Faith and myself.
-.\"
-.\" This is free documentation; 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.
-.\"
-.\" The GNU General Public License's references to "object code"
-.\" and "executables" are to be interpreted as the output of any
-.\" document formatting or typesetting system, including
-.\" intermediate and printed output.
-.\"
-.\" This manual is distributed in the hope that it will 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.
-.\"
-.TH UMOUNT 8 "March 2010" "util-linux" "System Administration"
-.SH NAME
-umount \- unmount file systems
-.SH SYNOPSIS
-.B umount
-.RB [ \-hV ]
-.LP
-.B umount \-a
-.RB [ \-dflnrv ]
-.RB [ \-t
-.IR vfstype ]
-.RB [ \-O
-.IR options ]
-.br
-.B umount
-.RB [ \-dflnrv ]
-.RI { dir | device }...
-.SH DESCRIPTION
-The
-.B umount
-command detaches the file system(s) mentioned from the file hierarchy.
-A file system is specified by giving the directory where it
-has been mounted. Giving the special device on which the file system lives
-may also work, but is obsolete, mainly because it will fail
-in case this device was mounted on more than one directory.
-
-Note that a file system cannot be unmounted when it is `busy' -
-for example, when there are open files on it, or when some process
-has its working directory there, or when a swap file on it is in use.
-The offending process could even be
-.B umount
-itself - it opens libc, and libc in its turn may open for example
-locale files.
-A lazy unmount avoids this problem.
-
-Options for the
-.B umount
-command:
-.TP
-.B \-V
-Print version and exit.
-.TP
-.B \-h
-Print help message and exit.
-.TP
-.B \-v
-Verbose mode.
-.TP
-.B \-n
-Unmount without writing in
-.IR /etc/mtab .
-.TP
-.B \-r
-In case unmounting fails, try to remount read-only.
-.TP
-.B \-d
-In case the unmounted device was a loop device, also
-free this loop device.
-.TP
-.B \-i
-Don't call the /sbin/umount.<filesystem> helper even if it exists. By default /sbin/umount.<filesystem> helper is called if one exists.
-.TP
-.B \-a
-All of the file systems described in
-.I /etc/mtab
-are unmounted. (With
-.B umount
-version 2.7 and later: the
-.I proc
-filesystem is not unmounted.)
-.TP
-.BI \-t " vfstype"
-Indicate that the actions should only be taken on file systems of the
-specified type. More than one type may be specified in a comma separated
-list. The list of file system types can be prefixed with
-.B no
-to specify the file system types on which no action should be taken.
-.TP
-.BI \-O " options"
-Indicate that the actions should only be taken on file systems with
-the specified options in
-.IR /etc/fstab .
-More than one option type may be specified in a comma separated
-list. Each option can be prefixed with
-.B no
-to specify options for which no action should be taken.
-.TP
-.B \-f
-Force unmount (in case of an unreachable NFS system).
-(Requires kernel 2.1.116 or later.)
-.TP
-.B \-l
-Lazy unmount. Detach the filesystem from the filesystem hierarchy now,
-and cleanup all references to the filesystem as soon as it is not busy
-anymore.
-(Requires kernel 2.4.11 or later.)
-.IP "\fB\-\-no\-canonicalize\fP"
-Don't canonicalize paths. For more details about this option see the
-.BR mount (8)
-man page.
-.IP "\fB\-\-fake\fP"
-Causes everything to be done except for the actual system call; this
-``fakes'' unmounting the filesystem. It can be used to remove
-entries from
-.I /etc/mtab
-that were unmounted earlier with the -n option.
-
-.SH "THE LOOP DEVICE"
-The
-.B umount
-command will free the loop device (if any) associated
-with the mount, in case it finds the option `loop=...' in
-.IR /etc/mtab ,
-or when the \-d option was given.
-Any pending loop devices can be freed using `losetup -d', see
-.BR losetup (8).
-
-.SH NOTES
-The syntax of external umount helpers is:
-
-.br
-.BI /sbin/umount. <suffix>
-.RI { dir | device }
-.RB [ \-nlfvr ]
-.RB [ \-t
-.IR type.subtype ]
-.br
-
-where the <suffix> is filesystem type or a value from "uhelper=" or "helper="
-mtab option. The \-t option is used for filesystems with subtypes support
-(for example /sbin/mount.fuse -t fuse.sshfs).
-
-The uhelper= (unprivileged umount helper) is possible to use when non-root user
-wants to umount a mountpoint which is not defined in the /etc/fstab file (e.g
-devices mounted by udisk).
-
-The helper= mount option redirects all umount requests to the
-/sbin/umount.<helper> independently on UID.
-
-.SH FILES
-.I /etc/mtab
-table of mounted file systems
-
-.SH "SEE ALSO"
-.BR umount (2),
-.BR mount (8),
-.BR losetup (8).
-
-.SH HISTORY
-A
-.B umount
-command appeared in Version 6 AT&T UNIX.
-.SH AVAILABILITY
-The umount command is part of the util-linux package and is available from
-ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
+++ /dev/null
-/*
- * umount(8) for Linux 0.99 - jrs, 1993
- */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <getopt.h>
-#include <string.h>
-#include <errno.h>
-#include <ctype.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-#include <sys/mount.h>
-
-#include "mount_constants.h"
-#include "sundries.h"
-#include "getusername.h"
-#include "pathnames.h"
-#include "loopdev.h"
-#include "fstab.h"
-#include "env.h"
-#include "nls.h"
-#include "strutils.h"
-#include "closestream.h"
-
-#if defined(MNT_FORCE)
-/* Interesting ... it seems libc knows about MNT_FORCE and presumably
- about umount2 as well -- need not do anything */
-#else /* MNT_FORCE */
-
-/* Does the present kernel source know about umount2? */
-#include <linux/unistd.h>
-#ifdef __NR_umount2
-
-static int umount2(const char *path, int flags);
-
-_syscall2(int, umount2, const char *, path, int, flags);
-
-#else /* __NR_umount2 */
-
-static int
-umount2(const char *path, int flags) {
- fprintf(stderr, _("umount: compiled without support for -f\n"));
- errno = ENOSYS;
- return -1;
-}
-#endif /* __NR_umount2 */
-
-#ifndef MNT_FORCE
-# define MNT_FORCE 0x00000001 /* Attempt to forcibily umount */
-#endif
-
-#endif /* MNT_FORCE */
-
-#ifndef MNT_DETACH
-# define MNT_DETACH 0x00000002 /* Just detach from the tree */
-#endif
-
-#ifndef UMOUNT_NOFOLLOW
-# define UMOUNT_NOFOLLOW 0x00000008 /* Don't follow symlink on umount */
-#endif
-
-#ifndef UMOUNT_UNUSED
-# define UMOUNT_UNUSED 0x80000000 /* Flag guaranteed to be unused */
-#endif
-
-
-/* True if we are allowed to call /sbin/umount.${FSTYPE} */
-int external_allowed = 1;
-
-/* Nonzero for force umount (-f). There is kernel support since 2.1.116. */
-int force = 0;
-
-/* Nonzero for lazy umount (-l). There is kernel support since 2.4.11. */
-int lazy = 0;
-
-/* When umount fails, attempt a read-only remount (-r). */
-int remount = 0;
-
-/* Don't write a entry in /etc/mtab (-n). */
-int nomtab = 0;
-
-/* Call losetup -d for each unmounted loop device. */
-int delloop = 0;
-
-/* True if (ruid != euid) or (0 != ruid), i.e. only "user" umounts permitted. */
-int restricted = 1;
-
-/* Last error message */
-int complained_err = 0;
-char *complained_dev = NULL;
-
-/* True for fake umount (--fake). */
-static int fake = 0;
-
-/*
- * check_special_umountprog()
- * If there is a special umount program for this type, exec it.
- * returns: 0: no exec was done, 1: exec was done, status has result
- */
-static int
-check_special_umountprog(const char *node,
- const char *type, int *status) {
- char search_path[] = FS_SEARCH_PATH;
- char *path, umountprog[150];
- struct stat statbuf;
- int res;
-
- if (!external_allowed)
- return 0;
-
- if (type == NULL || strcmp(type, "none") == 0)
- return 0;
-
- path = strtok(search_path, ":");
- while (path) {
- int type_opt = 0;
-
- res = snprintf(umountprog, sizeof(umountprog), "%s/umount.%s",
- path, type);
- path = strtok(NULL, ":");
- if (res < 0 || (size_t) res >= sizeof(umountprog))
- continue;
-
- res = stat(umountprog, &statbuf);
- if (res == -1 && errno == ENOENT && strchr(type, '.')) {
- /* If type ends with ".subtype" try without it */
- *strrchr(umountprog, '.') = '\0';
- type_opt = 1;
- res = stat(umountprog, &statbuf);
- }
- if (res == 0) {
- res = fork();
- if (res == 0) {
- char *umountargs[10];
- int i = 0;
-
- if(setgid(getgid()) < 0)
- die(EX_FAIL, _("umount: cannot set group id: %m"));
-
- if(setuid(getuid()) < 0)
- die(EX_FAIL, _("umount: cannot set user id: %m"));
-
- umountargs[i++] = umountprog;
- umountargs[i++] = xstrdup(node);
- if (nomtab)
- umountargs[i++] = "-n";
- if (lazy)
- umountargs[i++] = "-l";
- if (force)
- umountargs[i++] = "-f";
- if (verbose)
- umountargs[i++] = "-v";
- if (remount)
- umountargs[i++] = "-r";
- if (type_opt) {
- umountargs[i++] = "-t";
- umountargs[i++] = (char *) type;
- }
- umountargs[i] = NULL;
- execv(umountprog, umountargs);
- exit(1); /* exec failed */
- } else if (res != -1) {
- int st;
- wait(&st);
- *status = (WIFEXITED(st) ? WEXITSTATUS(st)
- : EX_SYSERR);
- return 1;
- } else {
- int errsv = errno;
- error(_("umount: cannot fork: %s"),
- strerror(errsv));
- }
- }
- }
- return 0;
-}
-
-/* complain about a failed umount */
-static void complain(int err, const char *dev) {
-
- if (complained_err == err && complained_dev && dev &&
- strcmp(dev, complained_dev) == 0)
- return;
-
- complained_err = err;
- free(complained_dev);
- complained_dev = xstrdup(dev);
-
- switch (err) {
- case ENXIO:
- error (_("umount: %s: invalid block device"), dev); break;
- case EINVAL:
- error (_("umount: %s: not mounted"), dev); break;
- case EIO:
- error (_("umount: %s: can't write superblock"), dev); break;
- case EBUSY:
- /* Let us hope fstab has a line "proc /proc ..."
- and not "none /proc ..."*/
- error (_("umount: %s: device is busy.\n"
- " (In some cases useful info about processes that use\n"
- " the device is found by lsof(8) or fuser(1))"), dev);
- break;
- case ENOENT:
- error (_("umount: %s: not found"), dev); break;
- case EPERM:
- error (_("umount: %s: must be superuser to umount"), dev); break;
- case EACCES:
- error (_("umount: %s: block devices not permitted on fs"), dev); break;
- default:
- error (_("umount: %s: %s"), dev, strerror (err)); break;
- }
-}
-
-/* Check whether the kernel supports UMOUNT_NOFOLLOW flag */
-static int umount_nofollow_support(void)
-{
- int res = umount2("", UMOUNT_UNUSED);
- if (res != -1 || errno != EINVAL)
- return 0;
-
- res = umount2("", UMOUNT_NOFOLLOW);
- if (res != -1 || errno != ENOENT)
- return 0;
-
- return 1;
-}
-
-static const char *chdir_to_parent(const char *node, char **resbuf)
-{
- char *tmp, *res;
- const char *parent;
- char buf[65536];
-
- *resbuf = xstrdup(node);
-
- tmp = strrchr(*resbuf, '/');
- if (!tmp)
- die (2, _("umount: internal error: invalid abs path: %s"), node);
-
- if (tmp != *resbuf) {
- *tmp = '\0';
- res = tmp + 1;
- parent = *resbuf;
- } else if (tmp[1] != '\0') {
- res = tmp + 1;
- parent = "/";
- } else {
- res = ".";
- parent = "/";
- }
-
- if (chdir(parent) == -1)
- die (2, _("umount: failed to chdir to %s: %m"), parent);
-
- if (!getcwd(buf, sizeof(buf)))
- die (2, _("umount: failed to obtain current directory: %m"));
-
- if (strcmp(buf, parent) != 0)
- die (2, _("umount: mountpoint moved (%s -> %s)"), parent, buf);
-
- if (verbose)
- printf(_("current directory moved to %s\n"), res);
-
- return res;
-}
-
-/* Umount a single device. Return a status code, so don't exit
- on a non-fatal error. We lock/unlock around each umount. */
-static int
-umount_one (const char *spec, const char *node, const char *type,
- struct mntentchn *mc) {
- int umnt_err = 0;
- int isroot;
- int res = 0;
- int status;
- int extra_flags = 0;
- const char *loopdev, *target = node;
- char *targetbuf = NULL;
-
- /* Special case for root. As of 0.99pl10 we can (almost) unmount root;
- the kernel will remount it readonly so that we can carry on running
- afterwards. The readonly remount is illegal if any files are opened
- for writing at the time, so we can't update mtab for an unmount of
- root. As it is only really a remount, this doesn't matter too
- much. [sct May 29, 1993] */
- isroot = (streq (node, "/") || streq (node, "root")
- || streq (node, "rootfs"));
- if (isroot)
- nomtab++;
-
- /*
- * Call umount.TYPE for types that require a separate umount program.
- * All such special things must occur isolated in the types string.
- */
- if (check_special_umountprog(node, type, &status))
- return status;
-
- block_signals(SIG_BLOCK);
-
- /* Skip the actual umounting for --fake */
- if (fake)
- goto writemtab;
-
- if (restricted) {
- if (umount_nofollow_support())
- extra_flags |= UMOUNT_NOFOLLOW;
-
- /* call umount(2) with relative path to avoid races */
- target = chdir_to_parent(node, &targetbuf);
- }
-
- if (lazy) {
- res = umount2 (target, MNT_DETACH | extra_flags);
- if (res < 0)
- umnt_err = errno;
- goto writemtab;
- }
-
- if (force) { /* only supported for NFS */
- res = umount2 (target, MNT_FORCE | extra_flags);
- if (res == -1) {
- int errsv = errno;
- perror("umount2");
- errno = errsv;
- if (errno == ENOSYS) {
- if (verbose)
- printf(_("no umount2, trying umount...\n"));
- res = umount (target);
- }
- }
- } else if (extra_flags)
- res = umount2 (target, extra_flags);
- else
- res = umount (target);
-
- free(targetbuf);
-
- if (res < 0)
- umnt_err = errno;
-
- if (res < 0 && remount && umnt_err == EBUSY) {
- /* Umount failed - let us try a remount */
- res = mount(spec, node, NULL,
- MS_MGC_VAL | MS_REMOUNT | MS_RDONLY, NULL);
- if (res == 0) {
- fprintf(stderr,
- _("umount: %s busy - remounted read-only\n"),
- spec);
- if (mc && !nomtab) {
- /* update mtab if the entry is there */
- struct my_mntent remnt;
- remnt.mnt_fsname = mc->m.mnt_fsname;
- remnt.mnt_dir = mc->m.mnt_dir;
- remnt.mnt_type = mc->m.mnt_type;
- remnt.mnt_opts = "ro";
- remnt.mnt_freq = 0;
- remnt.mnt_passno = 0;
- update_mtab(node, &remnt);
- }
- block_signals(SIG_UNBLOCK);
- return 0;
- } else if (errno != EBUSY) { /* hmm ... */
- perror("remount");
- fprintf(stderr,
- _("umount: could not remount %s read-only\n"),
- spec);
- }
- }
-
- loopdev = 0;
- if (res >= 0) {
- /* Umount succeeded */
- if (verbose)
- printf (_("%s has been unmounted\n"), spec);
-
- /* Free any loop devices that we allocated ourselves */
- if (mc) {
- char *optl;
-
- /* old style mtab line? */
- if (streq(mc->m.mnt_type, "loop")) {
- loopdev = spec;
- goto gotloop;
- }
-
- /* new style mtab line? */
- optl = mc->m.mnt_opts ? xstrdup(mc->m.mnt_opts) : "";
- for (optl = strtok (optl, ","); optl;
- optl = strtok (NULL, ",")) {
- if (!strncmp(optl, "loop=", 5)) {
- loopdev = optl+5;
- goto gotloop;
- }
- }
- } else {
- /*
- * If option "-o loop=spec" occurs in mtab,
- * note the mount point, and delete mtab line.
- */
- if ((mc = getmntoptfile (spec)) != NULL)
- node = mc->m.mnt_dir;
- }
-
- /* Also free loop devices when -d flag is given */
- if (delloop)
- loopdev = spec;
- }
- gotloop:
- if (loopdev) {
- struct loopdev_cxt lc;
-
- loopcxt_init(&lc, 0);
- loopcxt_set_device(&lc, loopdev);
-
- if (loopcxt_get_backing_file(&lc)
- && loopcxt_is_autoclear(&lc) == 0)
- loopcxt_delete_device(&lc);
- loopcxt_deinit(&lc);
- }
-
- writemtab:
- if (!nomtab &&
- (umnt_err == 0 || umnt_err == EINVAL || umnt_err == ENOENT)) {
-
- update_mtab (node, NULL);
- }
-
- block_signals(SIG_UNBLOCK);
-
- if (res >= 0)
- return 0;
- if (umnt_err)
- complain(umnt_err, node);
- return 1;
-}
-
-/*
- * umount_one_bw: unmount FILE that has last occurrence MC0
- *
- * Why this loop?
- * 1. People who boot a system with a bad fstab root entry
- * will get an incorrect "/dev/foo on /" in mtab.
- * If later /dev/foo is actually mounted elsewhere,
- * it will occur twice in mtab.
- * 2. With overmounting one can get the situation that
- * the same filename is used as mount point twice.
- * In both cases, it is best to try the last occurrence first.
- */
-static int
-umount_one_bw (const char *file, struct mntentchn *mc0) {
- struct mntentchn *mc;
- int res = 1;
-
- mc = mc0;
- while (res && mc) {
- res = umount_one(mc->m.mnt_fsname, mc->m.mnt_dir,
- mc->m.mnt_type, mc);
- mc = getmntdirbackward(file, mc);
- }
- mc = mc0;
- while (res && mc) {
- res = umount_one(mc->m.mnt_fsname, mc->m.mnt_dir,
- mc->m.mnt_type, mc);
- mc = getmntdevbackward(file, mc);
- }
- return res;
-}
-
-/* Unmount all filesystems of type VFSTYPES found in mtab. Since we are
- concurrently updating mtab after every successful umount, we have to
- slurp in the entire file before we start. This isn't too bad, because
- in any case it's important to umount mtab entries in reverse order
- to mount, e.g. /usr/spool before /usr. */
-static int
-umount_all (char *types, char *test_opts) {
- struct mntentchn *mc, *hd;
- int errors = 0;
-
- hd = mtab_head();
- if (!hd->prev)
- die (2, _("umount: cannot find list of filesystems to unmount"));
- for (mc = hd->prev; mc != hd; mc = mc->prev) {
- if (matching_type (mc->m.mnt_type, types)
- && matching_opts (mc->m.mnt_opts, test_opts)) {
- errors |= umount_one (mc->m.mnt_fsname, mc->m.mnt_dir,
- mc->m.mnt_type, mc);
- }
- }
-
- return errors;
-}
-
-static struct option longopts[] =
-{
- { "all", 0, 0, 'a' },
- { "force", 0, 0, 'f' },
- { "help", 0, 0, 'h' },
- { "no-mtab", 0, 0, 'n' },
- { "test-opts", 1, 0, 'O' },
- { "verbose", 0, 0, 'v' },
- { "version", 0, 0, 'V' },
- { "read-only", 0, 0, 'r' },
- { "types", 1, 0, 't' },
-
- { "no-canonicalize", 0, 0, 144 },
- { "fake", 0, 0, 145 },
- { NULL, 0, 0, 0 }
-};
-
-static void
-usage (FILE *fp, int n)
-{
- fprintf (fp, _("Usage: umount -h | -V\n"
- " umount -a [-d] [-f] [-r] [-n] [-v] [-t vfstypes] [-O opts]\n"
- " umount [-d] [-f] [-r] [-n] [-v] special | node...\n"));
- exit (n);
-}
-
-/*
- * Look for an option in a comma-separated list
- */
-static int
-contains(const char *list, const char *s) {
- int n = strlen(s);
-
- while (list && *list) {
- if (strncmp(list, s, n) == 0 &&
- (list[n] == 0 || list[n] == ','))
- return 1;
- while (*list && *list++ != ',') ;
- }
- return 0;
-}
-
-/* check if @mc contains a loop device which is associated
- * with the @file in fs
- */
-static int
-is_valid_loop(struct mntentchn *mc, struct mntentchn *fs)
-{
- uintmax_t offset = 0;
- char *p;
-
- /* check if it begins with /dev/loop */
- if (strncmp(mc->m.mnt_fsname, _PATH_DEV_LOOP,
- sizeof(_PATH_DEV_LOOP) - 1))
- return 0;
-
- /* check for loop option in fstab */
- if (!contains(fs->m.mnt_opts, "loop"))
- return 0;
-
- /* check for offset option in fstab */
- p = get_option_value(fs->m.mnt_opts, "offset=");
- if (p && strtosize(p, &offset)) {
- if (verbose > 1)
- printf(_("failed to parse 'offset=%s' options\n"), p);
- return 0;
- }
-
- /* check association */
- if (loopdev_is_used((char *) mc->m.mnt_fsname, fs->m.mnt_fsname,
- offset, LOOPDEV_FL_OFFSET) == 1) {
- if (verbose > 1)
- printf(_("device %s is associated with %s\n"),
- mc->m.mnt_fsname, fs->m.mnt_fsname);
- return 1;
- }
-
- if (verbose > 1)
- printf(_("device %s is not associated with %s\n"),
- mc->m.mnt_fsname, fs->m.mnt_fsname);
- return 0;
-}
-
-/*
- * umount helper call based on {u,p}helper= mount option
- */
-static int check_helper_umountprog(const char *node,
- const char *opts, const char *name,
- int *status)
-{
- char *helper;
-
- if (!external_allowed || !opts)
- return 0;
-
- helper = get_option_value(opts, name);
- if (helper)
- return check_special_umountprog(node, helper, status);
-
- return 0;
-}
-
-static int
-umount_file (char *arg) {
- struct mntentchn *mc, *fs;
- const char *file, *options;
- int fstab_has_user, fstab_has_users, fstab_has_owner, fstab_has_group;
- int ok, status = 0;
- struct stat statbuf;
- char *loopdev = NULL;
-
- if (!*arg) { /* "" would be expanded to `pwd` */
- die(2, _("Cannot unmount \"\"\n"));
- return 0;
- }
-
- file = canonicalize(arg); /* mtab paths are canonicalized */
-
-try_loopdev:
- if (verbose > 1)
- printf(_("Trying to unmount %s\n"), file);
-
- mc = getmntdirbackward(file, NULL);
- if (!mc) {
- mc = getmntdevbackward(file, NULL);
- if (mc) {
- struct mntentchn *mc1;
- char *cn;
-
- mc1 = getmntdirbackward(mc->m.mnt_dir, NULL);
- if (!mc1)
- /* 'mc1' must exist, though not necessarily
- equals to `mc'. Otherwise we go mad. */
- die(EX_SOFTWARE,
- _("umount: confused when analyzing mtab"));
-
- cn = canonicalize(mc1->m.mnt_fsname);
- if (cn && strcmp(file, cn)) {
- /* Something was stacked over `file' on the
- same mount point. */
- die(EX_FAIL, _("umount: cannot unmount %s -- %s is "
- "mounted over it on the same point"),
- file, mc1->m.mnt_fsname);
- }
- free(cn);
- }
- }
- if (!mc && verbose)
- printf(_("Could not find %s in mtab\n"), file);
-
- /* not found in mtab - check if it is associated with some loop device
- * (only if it is a regular file)
- */
- if (!mc && !loopdev && !stat(file, &statbuf) && S_ISREG(statbuf.st_mode)) {
- int count = loopdev_count_by_backing_file(file, &loopdev);
-
- if (count == 1) {
- if (verbose)
- printf(_("%s is associated with %s\n"),
- arg, loopdev);
- file = loopdev;
- goto try_loopdev;
-
- } else if (count > 1)
- fprintf(stderr, _("umount: warning: %s is associated "
- "with more than one loop device\n"), arg);
- }
-
- if (mc) {
- /*
- * helper - umount helper (e.g. pam_mount)
- */
- if (check_helper_umountprog(arg, mc->m.mnt_opts,
- "helper=", &status))
- return status;
- }
-
- if (restricted) {
- char *mtab_user = NULL;
-
- if (!mc)
- die(2,
- _("umount: %s is not mounted (according to mtab)"),
- file);
- /*
- * uhelper - unprivileged umount helper (e.g. HAL/udisks mounts)
- */
- if (check_helper_umountprog(arg, mc->m.mnt_opts,
- "uhelper=", &status))
- return status;
-
- /* The 2.4 kernel will generally refuse to mount the same
- filesystem on the same mount point, but will accept NFS.
- So, unmounting must be possible. */
- if (!is_mounted_once(file) && strcmp(mc->m.mnt_type,"nfs"))
- die(2,
- _("umount: it seems %s is mounted multiple times"),
- file);
-
- /* If fstab contains the two lines
- /dev/sda1 /mnt/zip auto user,noauto 0 0
- /dev/sda4 /mnt/zip auto user,noauto 0 0
- then "mount /dev/sda4" followed by "umount /mnt/zip"
- used to fail. So, we must not look for file, but for
- the pair (dev,file) in fstab. */
- fs = getfs_by_devdir(mc->m.mnt_fsname, mc->m.mnt_dir);
- if (!fs) {
- fs = getfs_by_dir(file);
- if (!fs && !getfs_by_spec(file))
- die (2,
- _("umount: %s is not in the fstab "
- "(and you are not root)"),
- file);
-
- /* spec could be a file which is loop mounted */
- if (!fs || !is_valid_loop(mc, fs))
- die (2, _("umount: %s mount disagrees with "
- "the fstab"), file);
- }
-
- /*
- * User mounting and unmounting is allowed only
- * if fstab contains one of the options `user',
- * `users' or `owner' or `group'.
- *
- * The option `users' allows arbitrary users to mount
- * and unmount - this may be a security risk.
- *
- * The options `user', `owner' and `group' only allow
- * unmounting by the user that mounted (visible in mtab).
- */
-
- options = fs->m.mnt_opts;
- if (!options)
- options = "";
- fstab_has_user = contains(options, "user");
- fstab_has_users = contains(options, "users");
- fstab_has_owner = contains(options, "owner");
- fstab_has_group = contains(options, "group");
- ok = 0;
-
- if (fstab_has_users)
- ok = 1;
-
- if (!ok && (fstab_has_user || fstab_has_owner ||
- fstab_has_group)) {
- char *user = getusername();
-
- options = mc->m.mnt_opts;
- if (!options)
- options = "";
- mtab_user = get_option_value(options, "user=");
-
- if (user && mtab_user && streq (user, mtab_user))
- ok = 1;
- }
- if (!ok)
- die (2, _("umount: only %s can unmount %s from %s"),
- mtab_user ? mtab_user : "root",
- fs->m.mnt_fsname, fs->m.mnt_dir);
-
- }
-
- if (mc)
- return umount_one_bw (file, mc);
- else
- return umount_one (arg, arg, arg, NULL);
-}
-
-int
-main (int argc, char *argv[]) {
- int c;
- int all = 0;
- char *types = NULL, *test_opts = NULL, *p;
- int result = 0;
-
- sanitize_env();
- setlocale(LC_ALL, "");
- bindtextdomain(PACKAGE, LOCALEDIR);
- textdomain(PACKAGE);
- atexit(close_stdout);
-
- progname = argv[0];
- if ((p = strrchr(progname, '/')) != NULL)
- progname = p+1;
-
- umask(022);
-
- while ((c = getopt_long (argc, argv, "adfhlnrit:O:vV",
- longopts, NULL)) != -1)
- switch (c) {
- case 'a': /* umount everything */
- ++all;
- break;
- /* fall through? */
- case 'd': /* do losetup -d for unmounted loop devices */
- ++delloop;
- break;
- case 'f': /* force umount */
- ++force;
- break;
- case 'h': /* help */
- usage (stdout, 0);
- break;
- case 'l': /* lazy umount */
- ++lazy;
- break;
- case 'n': /* do not write in /etc/mtab */
- ++nomtab;
- break;
- case 'O': /* specify file system options */
- test_opts = optarg;
- break;
- case 'r': /* remount read-only if umount fails */
- ++remount;
- break;
- case 'v': /* make noise */
- ++verbose;
- break;
- case 'V': /* version */
- printf(UTIL_LINUX_VERSION);
- exit (0);
- case 't': /* specify file system type */
- types = optarg;
- break;
- case 'i':
- external_allowed = 0;
- break;
- case 144:
- nocanonicalize = 1;
- break;
- case 145:
- fake = 1;
- break;
- case 0:
- break;
- case '?':
- default:
- usage (stderr, 1);
- }
-
- {
- const uid_t ruid = getuid();
- const uid_t euid = geteuid();
-
- /* if we're really root and aren't running setuid */
- if (((uid_t)0 == ruid) && (ruid == euid)) {
- restricted = 0;
- }
- }
-
- if (restricted &&
- (all || types || nomtab || force || remount || nocanonicalize ||
- fake)) {
- die (2, _("umount: only root can do that"));
- }
-
- argc -= optind;
- argv += optind;
-
- atexit(unlock_mtab);
-
- if (all) {
- /* nodev stuff: sysfs, usbfs, oprofilefs, ... */
- if (types == NULL)
- types = "noproc,nodevfs,nodevpts,nosysfs,norpc_pipefs,nonfsd";
- result = umount_all (types, test_opts);
- } else if (argc < 1) {
- usage (stderr, 2);
- } else while (argc--) {
- result += umount_file(*argv++);
- }
- exit (result); /* nonzero on at least one failure */
-}
+++ /dev/null
-blkid: libblkid libuuid
-cfdisk: libblkid libncursesw libtinfo libuuid
-eject: libblkid libmount libuuid
-fdisk: libblkid libuuid
-findfs: libblkid libuuid
-findmnt: libblkid libmount libudev libuuid
-fsck: libblkid libmount libuuid
-fstrim: libblkid libmount libuuid
-libblkid.so.1.1.0: libuuid
-libmount.so.1.1.0: libblkid libuuid
-libuuid.so.1.3.0:
-lsblk: libblkid libmount libudev libuuid
-lslocks: libblkid libmount libuuid
-mkswap: libblkid libuuid
-mount: libblkid libuuid
-mountpoint: libblkid libmount libuuid
-partx: libblkid libuuid
-swaplabel: libblkid libuuid
-swapoff: libblkid libmount libuuid
-swapon: libblkid libmount libuuid
-umount: libblkid libuuid
-uuidd: libuuid
-uuidgen: libuuid
-wipefs: libblkid libuuid
-addpart:
-agetty:
-blkdiscard:
-blockdev:
-cal: libncursesw libtinfo
-chcpu:
-chrt:
-col:
-colcrt:
-colrm:
-column:
-ctrlaltdel:
-cytune:
-delpart:
-dmesg: librt
-fallocate:
-fdformat:
-flock:
-fsck.cramfs: libz
-fsck.minix:
-fsfreeze:
-getopt:
-hexdump:
-hwclock:
-ionice:
-ipcmk:
-ipcrm:
-ipcs:
-isosize:
-kill:
-last:
-ldattach:
-logger:
-login: libpam libpam_misc
-look:
-losetup:
-lscpu:
-mcookie:
-mesg:
-mkfs:
-mkfs.bfs:
-mkfs.cramfs: libz
-mkfs.minix:
-more: libtinfo
-namei:
-nologin:
-nsenter:
-pg: libncursesw libtinfo
-pivot_root:
-prlimit:
-raw:
-readprofile:
-rename:
-renice:
-resizepart:
-rev:
-rtcwake:
-runuser: libpam libpam_misc
-script: libutil
-scriptreplay:
-setarch:
-setpriv: ap-ng
-setsid:
-setterm: libtinfo
-sfdisk:
-su: libpam libpam_misc
-sulogin: rypt
-switch_root:
-tailf:
-taskset:
-ul: libtinfo
-unshare:
-utmpdump:
-wall:
-wdctl:
-whereis:
ts_device_has "TYPE" "ext3" $DEVICE || ts_die "Cannot find ext3 on $DEVICE" $DEVICE
-# multiple propagation flags for one mount(8) call is unsupported
-# by old mount-deprecated/mount
-$TS_CMD_MOUNT -V | grep -q libmount
-if [ $? -eq 0 ]; then
-
- ts_init_subtest "mount-private"
- $TS_CMD_MOUNT --make-private --make-unbindable \
- $DEVICE $MOUNTPOINT >> $TS_OUTPUT 2>&1
- $TS_CMD_FINDMNT -nr --target $MOUNTPOINT -o PROPAGATION >> $TS_OUTPUT
- $TS_CMD_UMOUNT $MOUNTPOINT
- ts_finalize_subtest
-
- ts_init_subtest "mount-private-ro"
- $TS_CMD_MOUNT $DEVICE $MOUNTPOINT -o ro,private >> $TS_OUTPUT 2>&1
- $TS_CMD_FINDMNT -nr --target $MOUNTPOINT -o PROPAGATION >> $TS_OUTPUT
- $TS_CMD_FINDMNT -nr --target $MOUNTPOINT -o VFS-OPTIONS >> $TS_OUTPUT
- $TS_CMD_UMOUNT $MOUNTPOINT
- ts_finalize_subtest
-fi
+ts_init_subtest "mount-private"
+$TS_CMD_MOUNT --make-private --make-unbindable \
+ $DEVICE $MOUNTPOINT >> $TS_OUTPUT 2>&1
+$TS_CMD_FINDMNT -nr --target $MOUNTPOINT -o PROPAGATION >> $TS_OUTPUT
+$TS_CMD_UMOUNT $MOUNTPOINT
+ts_finalize_subtest
+
+ts_init_subtest "mount-private-ro"
+$TS_CMD_MOUNT $DEVICE $MOUNTPOINT -o ro,private >> $TS_OUTPUT 2>&1
+$TS_CMD_FINDMNT -nr --target $MOUNTPOINT -o PROPAGATION >> $TS_OUTPUT
+$TS_CMD_FINDMNT -nr --target $MOUNTPOINT -o VFS-OPTIONS >> $TS_OUTPUT
+$TS_CMD_UMOUNT $MOUNTPOINT
+ts_finalize_subtest
ts_device_deinit $DEVICE
rmdir $MOUNTPOINT
+++ /dev/null
-include:core.conf
-
---enable-deprecated-mount
projects / thirdparty / util-linux.git / commitdiff
