[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/util-linux/mount.c b/ap/app/busybox/src/util-linux/mount.c
new file mode 100644
index 0000000..2f94b69
--- /dev/null
+++ b/ap/app/busybox/src/util-linux/mount.c
@@ -0,0 +1,2305 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini mount implementation for busybox
+ *
+ * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2005-2006 by Rob Landley <rob@landley.net>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+// Design notes: There is no spec for mount. Remind me to write one.
+//
+// mount_main() calls singlemount() which calls mount_it_now().
+//
+// mount_main() can loop through /etc/fstab for mount -a
+// singlemount() can loop through /etc/filesystems for fstype detection.
+// mount_it_now() does the actual mount.
+//
+
+//usage:#define mount_trivial_usage
+//usage: "[OPTIONS] [-o OPTS] DEVICE NODE"
+//usage:#define mount_full_usage "\n\n"
+//usage: "Mount a filesystem. Filesystem autodetection requires /proc.\n"
+//usage: "\n -a Mount all filesystems in fstab"
+//usage: IF_FEATURE_MOUNT_FAKE(
+//usage: IF_FEATURE_MTAB_SUPPORT(
+//usage: "\n -f Update /etc/mtab, but don't mount"
+//usage: )
+//usage: IF_NOT_FEATURE_MTAB_SUPPORT(
+//usage: "\n -f Dry run"
+//usage: )
+//usage: )
+//usage: IF_FEATURE_MOUNT_HELPERS(
+//usage: "\n -i Don't run mount helper"
+//usage: )
+//usage: IF_FEATURE_MTAB_SUPPORT(
+//usage: "\n -n Don't update /etc/mtab"
+//usage: )
+//usage: IF_FEATURE_MOUNT_VERBOSE(
+//usage: "\n -v Verbose"
+//usage: )
+////usage: "\n -s Sloppy (ignored)"
+//usage: "\n -r Read-only mount"
+//usage: "\n -w Read-write mount (default)"
+//usage: "\n -t FSTYPE[,...] Filesystem type(s)"
+//usage: "\n -O OPT Mount only filesystems with option OPT (-a only)"
+//usage: "\n-o OPT:"
+//usage: IF_FEATURE_MOUNT_LOOP(
+//usage: "\n loop Ignored (loop devices are autodetected)"
+//usage: )
+//usage: IF_FEATURE_MOUNT_FLAGS(
+//usage: "\n [a]sync Writes are [a]synchronous"
+//usage: "\n [no]atime Disable/enable updates to inode access times"
+//usage: "\n [no]diratime Disable/enable atime updates to directories"
+//usage: "\n [no]relatime Disable/enable atime updates relative to modification time"
+//usage: "\n [no]dev (Dis)allow use of special device files"
+//usage: "\n [no]exec (Dis)allow use of executable files"
+//usage: "\n [no]suid (Dis)allow set-user-id-root programs"
+//usage: "\n [r]shared Convert [recursively] to a shared subtree"
+//usage: "\n [r]slave Convert [recursively] to a slave subtree"
+//usage: "\n [r]private Convert [recursively] to a private subtree"
+//usage: "\n [un]bindable Make mount point [un]able to be bind mounted"
+//usage: "\n [r]bind Bind a file or directory [recursively] to another location"
+//usage: "\n move Relocate an existing mount point"
+//usage: )
+//usage: "\n remount Remount a mounted filesystem, changing flags"
+//usage: "\n ro/rw Same as -r/-w"
+//usage: "\n"
+//usage: "\nThere are filesystem-specific -o flags."
+//usage:
+//usage:#define mount_example_usage
+//usage: "$ mount\n"
+//usage: "/dev/hda3 on / type minix (rw)\n"
+//usage: "proc on /proc type proc (rw)\n"
+//usage: "devpts on /dev/pts type devpts (rw)\n"
+//usage: "$ mount /dev/fd0 /mnt -t msdos -o ro\n"
+//usage: "$ mount /tmp/diskimage /opt -t ext2 -o loop\n"
+//usage: "$ mount cd_image.iso mydir\n"
+//usage:#define mount_notes_usage
+//usage: "Returns 0 for success, number of failed mounts for -a, or errno for one mount."
+
+#include <mntent.h>
+#include <syslog.h>
+#include <sys/mount.h>
+// Grab more as needed from util-linux's mount/mount_constants.h
+#ifndef MS_DIRSYNC
+# define MS_DIRSYNC (1 << 7) // Directory modifications are synchronous
+#endif
+#ifndef MS_UNION
+# define MS_UNION (1 << 8)
+#endif
+#ifndef MS_BIND
+# define MS_BIND (1 << 12)
+#endif
+#ifndef MS_MOVE
+# define MS_MOVE (1 << 13)
+#endif
+#ifndef MS_RECURSIVE
+# define MS_RECURSIVE (1 << 14)
+#endif
+#ifndef MS_SILENT
+# define MS_SILENT (1 << 15)
+#endif
+// The shared subtree stuff, which went in around 2.6.15
+#ifndef MS_UNBINDABLE
+# define MS_UNBINDABLE (1 << 17)
+#endif
+#ifndef MS_PRIVATE
+# define MS_PRIVATE (1 << 18)
+#endif
+#ifndef MS_SLAVE
+# define MS_SLAVE (1 << 19)
+#endif
+#ifndef MS_SHARED
+# define MS_SHARED (1 << 20)
+#endif
+#ifndef MS_RELATIME
+# define MS_RELATIME (1 << 21)
+#endif
+#ifndef MS_STRICTATIME
+# define MS_STRICTATIME (1 << 24)
+#endif
+
+/* Any ~MS_FOO value has this bit set: */
+#define BB_MS_INVERTED_VALUE (1u << 31)
+
+#include "libbb.h"
+#if ENABLE_FEATURE_MOUNT_LABEL
+# include "volume_id.h"
+#else
+# define resolve_mount_spec(fsname) ((void)0)
+#endif
+
+// Needed for nfs support only
+#include <sys/utsname.h>
+#undef TRUE
+#undef FALSE
+#if ENABLE_FEATURE_MOUNT_NFS
+/* This is just a warning of a common mistake. Possibly this should be a
+ * uclibc faq entry rather than in busybox... */
+# if defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
+# error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support"
+# endif
+# include <rpc/rpc.h>
+# include <rpc/pmap_prot.h>
+# include <rpc/pmap_clnt.h>
+#endif
+#ifndef MS_RELATIME
+#define MS_RELATIME (1 << 21) /* Update atime relative to mtime/ctime */
+#endif
+
+
+#if defined(__dietlibc__)
+// 16.12.2006, Sampo Kellomaki (sampo@iki.fi)
+// dietlibc-0.30 does not have implementation of getmntent_r()
+static struct mntent *getmntent_r(FILE* stream, struct mntent* result,
+ char* buffer UNUSED_PARAM, int bufsize UNUSED_PARAM)
+{
+ struct mntent* ment = getmntent(stream);
+ return memcpy(result, ment, sizeof(*ment));
+}
+#endif
+
+
+// Not real flags, but we want to be able to check for this.
+enum {
+ MOUNT_USERS = (1 << 28) * ENABLE_DESKTOP,
+ MOUNT_NOAUTO = (1 << 29),
+ MOUNT_SWAP = (1 << 30),
+};
+
+
+#define OPTION_STR "o:t:rwanfvsiO:"
+enum {
+ OPT_o = (1 << 0),
+ OPT_t = (1 << 1),
+ OPT_r = (1 << 2),
+ OPT_w = (1 << 3),
+ OPT_a = (1 << 4),
+ OPT_n = (1 << 5),
+ OPT_f = (1 << 6),
+ OPT_v = (1 << 7),
+ OPT_s = (1 << 8),
+ OPT_i = (1 << 9),
+ OPT_O = (1 << 10),
+};
+
+#if ENABLE_FEATURE_MTAB_SUPPORT
+#define USE_MTAB (!(option_mask32 & OPT_n))
+#else
+#define USE_MTAB 0
+#endif
+
+#if ENABLE_FEATURE_MOUNT_FAKE
+#define FAKE_IT (option_mask32 & OPT_f)
+#else
+#define FAKE_IT 0
+#endif
+
+#if ENABLE_FEATURE_MOUNT_HELPERS
+#define HELPERS_ALLOWED (!(option_mask32 & OPT_i))
+#else
+#define HELPERS_ALLOWED 0
+#endif
+
+
+// TODO: more "user" flag compatibility.
+// "user" option (from mount manpage):
+// Only the user that mounted a filesystem can unmount it again.
+// If any user should be able to unmount, then use users instead of user
+// in the fstab line. The owner option is similar to the user option,
+// with the restriction that the user must be the owner of the special file.
+// This may be useful e.g. for /dev/fd if a login script makes
+// the console user owner of this device.
+
+// Standard mount options (from -o options or --options),
+// with corresponding flags
+static const int32_t mount_options[] = {
+ // MS_FLAGS set a bit. ~MS_FLAGS disable that bit. 0 flags are NOPs.
+
+ IF_FEATURE_MOUNT_LOOP(
+ /* "loop" */ 0,
+ )
+
+ IF_FEATURE_MOUNT_FSTAB(
+ /* "defaults" */ 0,
+ /* "quiet" 0 - do not filter out, vfat wants to see it */
+ /* "noauto" */ MOUNT_NOAUTO,
+ /* "sw" */ MOUNT_SWAP,
+ /* "swap" */ MOUNT_SWAP,
+ IF_DESKTOP(/* "user" */ MOUNT_USERS,)
+ IF_DESKTOP(/* "users" */ MOUNT_USERS,)
+ /* "_netdev" */ 0,
+ IF_DESKTOP(/* "comment=" */ 0,) /* systemd uses this in fstab */
+ )
+
+ IF_FEATURE_MOUNT_FLAGS(
+ // vfs flags
+ /* "nosuid" */ MS_NOSUID,
+ /* "suid" */ ~MS_NOSUID,
+ /* "dev" */ ~MS_NODEV,
+ /* "nodev" */ MS_NODEV,
+ /* "exec" */ ~MS_NOEXEC,
+ /* "noexec" */ MS_NOEXEC,
+ /* "sync" */ MS_SYNCHRONOUS,
+ /* "dirsync" */ MS_DIRSYNC,
+ /* "async" */ ~MS_SYNCHRONOUS,
+ /* "atime" */ ~MS_NOATIME,
+ /* "noatime" */ MS_NOATIME,
+ /* "diratime" */ ~MS_NODIRATIME,
+ /* "nodiratime" */ MS_NODIRATIME,
+ /* "mand" */ MS_MANDLOCK,
+ /* "nomand" */ ~MS_MANDLOCK,
+ /* "relatime" */ MS_RELATIME,
+ /* "norelatime" */ ~MS_RELATIME,
+ /* "strictatime" */ MS_STRICTATIME,
+ /* "loud" */ ~MS_SILENT,
+ /* "rbind" */ MS_BIND|MS_RECURSIVE,
+
+ // action flags
+ /* "union" */ MS_UNION,
+ /* "bind" */ MS_BIND,
+ /* "move" */ MS_MOVE,
+ /* "shared" */ MS_SHARED,
+ /* "slave" */ MS_SLAVE,
+ /* "private" */ MS_PRIVATE,
+ /* "unbindable" */ MS_UNBINDABLE,
+ /* "rshared" */ MS_SHARED|MS_RECURSIVE,
+ /* "rslave" */ MS_SLAVE|MS_RECURSIVE,
+ /* "rprivate" */ MS_PRIVATE|MS_RECURSIVE,
+ /* "runbindable" */ MS_UNBINDABLE|MS_RECURSIVE,
+ )
+
+ // Always understood.
+ /* "ro" */ MS_RDONLY, // vfs flag
+ /* "rw" */ ~MS_RDONLY, // vfs flag
+ /* "remount" */ MS_REMOUNT // action flag
+};
+
+static const char mount_option_str[] =
+ IF_FEATURE_MOUNT_LOOP(
+ "loop\0"
+ )
+ IF_FEATURE_MOUNT_FSTAB(
+ "defaults\0"
+ // "quiet\0" - do not filter out, vfat wants to see it
+ "noauto\0"
+ "sw\0"
+ "swap\0"
+ IF_DESKTOP("user\0")
+ IF_DESKTOP("users\0")
+ "_netdev\0"
+ IF_DESKTOP("comment=\0") /* systemd uses this in fstab */
+ )
+ IF_FEATURE_MOUNT_FLAGS(
+ // vfs flags
+ "nosuid\0"
+ "suid\0"
+ "dev\0"
+ "nodev\0"
+ "exec\0"
+ "noexec\0"
+ "sync\0"
+ "dirsync\0"
+ "async\0"
+ "atime\0"
+ "noatime\0"
+ "diratime\0"
+ "nodiratime\0"
+ "mand\0"
+ "nomand\0"
+ "relatime\0"
+ "norelatime\0"
+ "strictatime\0"
+ "loud\0"
+ "rbind\0"
+
+ // action flags
+ "union\0"
+ "bind\0"
+ "move\0"
+ "make-shared\0"
+ "make-slave\0"
+ "make-private\0"
+ "make-unbindable\0"
+ "make-rshared\0"
+ "make-rslave\0"
+ "make-rprivate\0"
+ "make-runbindable\0"
+ )
+
+ // Always understood.
+ "ro\0" // vfs flag
+ "rw\0" // vfs flag
+ "remount\0" // action flag
+;
+
+
+struct globals {
+#if ENABLE_FEATURE_MOUNT_NFS
+ smalluint nfs_mount_version;
+#endif
+#if ENABLE_FEATURE_MOUNT_VERBOSE
+ unsigned verbose;
+#endif
+ llist_t *fslist;
+ char getmntent_buf[1];
+} FIX_ALIASING;
+enum { GETMNTENT_BUFSIZE = COMMON_BUFSIZE - offsetof(struct globals, getmntent_buf) };
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define nfs_mount_version (G.nfs_mount_version)
+#if ENABLE_FEATURE_MOUNT_VERBOSE
+#define verbose (G.verbose )
+#else
+#define verbose 0
+#endif
+#define fslist (G.fslist )
+#define getmntent_buf (G.getmntent_buf )
+#define INIT_G() do { } while (0)
+
+#if ENABLE_FEATURE_MTAB_SUPPORT
+/*
+ * update_mtab_entry_on_move() is used to update entry in case of mount --move.
+ * we are looking for existing entries mnt_dir which is equal to mnt_fsname of
+ * input mntent and replace it by new one.
+ */
+static void FAST_FUNC update_mtab_entry_on_move(const struct mntent *mp)
+{
+ struct mntent *entries, *m;
+ int i, count;
+ FILE *mountTable;
+
+ mountTable = setmntent(bb_path_mtab_file, "r");
+ if (!mountTable) {
+ bb_perror_msg(bb_path_mtab_file);
+ return;
+ }
+
+ entries = NULL;
+ count = 0;
+ while ((m = getmntent(mountTable)) != NULL) {
+ entries = xrealloc_vector(entries, 3, count);
+ entries[count].mnt_fsname = xstrdup(m->mnt_fsname);
+ entries[count].mnt_dir = xstrdup(m->mnt_dir);
+ entries[count].mnt_type = xstrdup(m->mnt_type);
+ entries[count].mnt_opts = xstrdup(m->mnt_opts);
+ entries[count].mnt_freq = m->mnt_freq;
+ entries[count].mnt_passno = m->mnt_passno;
+ count++;
+ }
+ endmntent(mountTable);
+
+ mountTable = setmntent(bb_path_mtab_file, "w");
+ if (mountTable) {
+ for (i = 0; i < count; i++) {
+ if (strcmp(entries[i].mnt_dir, mp->mnt_fsname) != 0)
+ addmntent(mountTable, &entries[i]);
+ else
+ addmntent(mountTable, mp);
+ }
+ endmntent(mountTable);
+ } else if (errno != EROFS)
+ bb_perror_msg(bb_path_mtab_file);
+
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ for (i = 0; i < count; i++) {
+ free(entries[i].mnt_fsname);
+ free(entries[i].mnt_dir);
+ free(entries[i].mnt_type);
+ free(entries[i].mnt_opts);
+ }
+ free(entries);
+ }
+}
+#endif
+
+#if ENABLE_FEATURE_MOUNT_VERBOSE
+static int verbose_mount(const char *source, const char *target,
+ const char *filesystemtype,
+ unsigned long mountflags, const void *data)
+{
+ int rc;
+
+ errno = 0;
+ rc = mount(source, target, filesystemtype, mountflags, data);
+ if (verbose >= 2)
+ bb_perror_msg("mount('%s','%s','%s',0x%08lx,'%s'):%d",
+ source, target, filesystemtype,
+ mountflags, (char*)data, rc);
+ return rc;
+}
+#else
+#define verbose_mount(...) mount(__VA_ARGS__)
+#endif
+
+// Append mount options to string
+static void append_mount_options(char **oldopts, const char *newopts)
+{
+ if (*oldopts && **oldopts) {
+ // Do not insert options which are already there
+ while (newopts[0]) {
+ char *p;
+ int len = strlen(newopts);
+ p = strchr(newopts, ',');
+ if (p) len = p - newopts;
+ p = *oldopts;
+ while (1) {
+ if (!strncmp(p, newopts, len)
+ && (p[len] == ',' || p[len] == '\0'))
+ goto skip;
+ p = strchr(p,',');
+ if (!p) break;
+ p++;
+ }
+ p = xasprintf("%s,%.*s", *oldopts, len, newopts);
+ free(*oldopts);
+ *oldopts = p;
+ skip:
+ newopts += len;
+ while (newopts[0] == ',') newopts++;
+ }
+ } else {
+ if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts);
+ *oldopts = xstrdup(newopts);
+ }
+}
+
+// Use the mount_options list to parse options into flags.
+// Also update list of unrecognized options if unrecognized != NULL
+static unsigned long parse_mount_options(char *options, char **unrecognized)
+{
+ unsigned long flags = MS_SILENT;
+
+ // Loop through options
+ for (;;) {
+ unsigned i;
+ char *comma = strchr(options, ',');
+ const char *option_str = mount_option_str;
+
+ if (comma) *comma = '\0';
+
+// FIXME: use hasmntopt()
+ // Find this option in mount_options
+ for (i = 0; i < ARRAY_SIZE(mount_options); i++) {
+ unsigned opt_len = strlen(option_str);
+
+ if (strncasecmp(option_str, options, opt_len) == 0
+ && (options[opt_len] == '\0'
+ /* or is it "comment=" thingy in fstab? */
+ IF_FEATURE_MOUNT_FSTAB(IF_DESKTOP( || option_str[opt_len-1] == '=' ))
+ )
+ ) {
+ unsigned long fl = mount_options[i];
+ if (fl & BB_MS_INVERTED_VALUE)
+ flags &= fl;
+ else
+ flags |= fl;
+ goto found;
+ }
+ option_str += opt_len + 1;
+ }
+ // We did not recognize this option.
+ // If "unrecognized" is not NULL, append option there.
+ // Note that we should not append *empty* option -
+ // in this case we want to pass NULL, not "", to "data"
+ // parameter of mount(2) syscall.
+ // This is crucial for filesystems that don't accept
+ // any arbitrary mount options, like cgroup fs:
+ // "mount -t cgroup none /mnt"
+ if (options[0] && unrecognized) {
+ // Add it to strflags, to pass on to kernel
+ char *p = *unrecognized;
+ unsigned len = p ? strlen(p) : 0;
+ *unrecognized = p = xrealloc(p, len + strlen(options) + 2);
+
+ // Comma separated if it's not the first one
+ if (len) p[len++] = ',';
+ strcpy(p + len, options);
+ }
+ found:
+ if (!comma)
+ break;
+ // Advance to next option
+ *comma = ',';
+ options = ++comma;
+ }
+
+ return flags;
+}
+
+// Return a list of all block device backed filesystems
+static llist_t *get_block_backed_filesystems(void)
+{
+ static const char filesystems[2][sizeof("/proc/filesystems")] = {
+ "/etc/filesystems",
+ "/proc/filesystems",
+ };
+ char *fs, *buf;
+ llist_t *list = NULL;
+ int i;
+ FILE *f;
+
+ for (i = 0; i < 2; i++) {
+ f = fopen_for_read(filesystems[i]);
+ if (!f) continue;
+
+ while ((buf = xmalloc_fgetline(f)) != NULL) {
+ if (strncmp(buf, "nodev", 5) == 0 && isspace(buf[5]))
+ goto next;
+ fs = skip_whitespace(buf);
+ if (*fs == '#' || *fs == '*' || !*fs)
+ goto next;
+
+ llist_add_to_end(&list, xstrdup(fs));
+ next:
+ free(buf);
+ }
+ if (ENABLE_FEATURE_CLEAN_UP) fclose(f);
+ }
+
+ return list;
+}
+
+#if ENABLE_FEATURE_CLEAN_UP
+static void delete_block_backed_filesystems(void)
+{
+ llist_free(fslist, free);
+}
+#else
+void delete_block_backed_filesystems(void);
+#endif
+
+// Perform actual mount of specific filesystem at specific location.
+// NB: mp->xxx fields may be trashed on exit
+static int mount_it_now(struct mntent *mp, unsigned long vfsflags, char *filteropts)
+{
+ int rc = 0;
+
+ if (FAKE_IT) {
+ if (verbose >= 2)
+ bb_error_msg("would do mount('%s','%s','%s',0x%08lx,'%s')",
+ mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
+ vfsflags, filteropts);
+ goto mtab;
+ }
+
+ // Mount, with fallback to read-only if necessary.
+ for (;;) {
+ errno = 0;
+ rc = verbose_mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
+ vfsflags, filteropts);
+
+ // If mount failed, try
+ // helper program mount.<mnt_type>
+ if (HELPERS_ALLOWED && rc && mp->mnt_type) {
+ char *args[8];
+ int errno_save = errno;
+ args[0] = xasprintf("mount.%s", mp->mnt_type);
+ rc = 1;
+ if (FAKE_IT)
+ args[rc++] = (char *)"-f";
+ if (ENABLE_FEATURE_MTAB_SUPPORT && !USE_MTAB)
+ args[rc++] = (char *)"-n";
+ args[rc++] = mp->mnt_fsname;
+ args[rc++] = mp->mnt_dir;
+ if (filteropts) {
+ args[rc++] = (char *)"-o";
+ args[rc++] = filteropts;
+ }
+ args[rc] = NULL;
+ rc = spawn_and_wait(args);
+ free(args[0]);
+ if (!rc)
+ break;
+ errno = errno_save;
+ }
+
+ if (!rc || (vfsflags & MS_RDONLY) || (errno != EACCES && errno != EROFS))
+ break;
+ if (!(vfsflags & MS_SILENT))
+ bb_error_msg("%s is write-protected, mounting read-only",
+ mp->mnt_fsname);
+ vfsflags |= MS_RDONLY;
+ }
+
+ // Abort entirely if permission denied.
+
+ if (rc && errno == EPERM)
+ bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+
+ // If the mount was successful, and we're maintaining an old-style
+ // mtab file by hand, add the new entry to it now.
+ mtab:
+ if (USE_MTAB && !rc && !(vfsflags & MS_REMOUNT)) {
+ char *fsname;
+ FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
+ const char *option_str = mount_option_str;
+ int i;
+
+ if (!mountTable) {
+ bb_perror_msg(bb_path_mtab_file);
+ goto ret;
+ }
+
+ // Add vfs string flags
+ for (i = 0; mount_options[i] != MS_REMOUNT; i++) {
+ if (mount_options[i] > 0 && (mount_options[i] & vfsflags))
+ append_mount_options(&(mp->mnt_opts), option_str);
+ option_str += strlen(option_str) + 1;
+ }
+
+ // Remove trailing / (if any) from directory we mounted on
+ i = strlen(mp->mnt_dir) - 1;
+ while (i > 0 && mp->mnt_dir[i] == '/')
+ mp->mnt_dir[i--] = '\0';
+
+ // Convert to canonical pathnames as needed
+ mp->mnt_dir = bb_simplify_path(mp->mnt_dir);
+ fsname = NULL;
+ if (!mp->mnt_type || !*mp->mnt_type) { // bind mount
+ mp->mnt_fsname = fsname = bb_simplify_path(mp->mnt_fsname);
+ mp->mnt_type = (char*)"bind";
+ }
+ mp->mnt_freq = mp->mnt_passno = 0;
+
+ // Write and close
+#if ENABLE_FEATURE_MTAB_SUPPORT
+ if (vfsflags & MS_MOVE)
+ update_mtab_entry_on_move(mp);
+ else
+#endif
+ addmntent(mountTable, mp);
+ endmntent(mountTable);
+
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(mp->mnt_dir);
+ free(fsname);
+ }
+ }
+ ret:
+ return rc;
+}
+
+#if ENABLE_FEATURE_MOUNT_NFS
+
+/*
+ * Linux NFS mount
+ * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ *
+ * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
+ * numbers to be specified on the command line.
+ *
+ * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
+ * Omit the call to connect() for Linux version 1.3.11 or later.
+ *
+ * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
+ * Implemented the "bg", "fg" and "retry" mount options for NFS.
+ *
+ * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
+ * - added Native Language Support
+ *
+ * Modified by Olaf Kirch and Trond Myklebust for new NFS code,
+ * plus NFSv3 stuff.
+ */
+
+#define MOUNTPORT 635
+#define MNTPATHLEN 1024
+#define MNTNAMLEN 255
+#define FHSIZE 32
+#define FHSIZE3 64
+
+typedef char fhandle[FHSIZE];
+
+typedef struct {
+ unsigned int fhandle3_len;
+ char *fhandle3_val;
+} fhandle3;
+
+enum mountstat3 {
+ MNT_OK = 0,
+ MNT3ERR_PERM = 1,
+ MNT3ERR_NOENT = 2,
+ MNT3ERR_IO = 5,
+ MNT3ERR_ACCES = 13,
+ MNT3ERR_NOTDIR = 20,
+ MNT3ERR_INVAL = 22,
+ MNT3ERR_NAMETOOLONG = 63,
+ MNT3ERR_NOTSUPP = 10004,
+ MNT3ERR_SERVERFAULT = 10006,
+};
+typedef enum mountstat3 mountstat3;
+
+struct fhstatus {
+ unsigned int fhs_status;
+ union {
+ fhandle fhs_fhandle;
+ } fhstatus_u;
+};
+typedef struct fhstatus fhstatus;
+
+struct mountres3_ok {
+ fhandle3 fhandle;
+ struct {
+ unsigned int auth_flavours_len;
+ char *auth_flavours_val;
+ } auth_flavours;
+};
+typedef struct mountres3_ok mountres3_ok;
+
+struct mountres3 {
+ mountstat3 fhs_status;
+ union {
+ mountres3_ok mountinfo;
+ } mountres3_u;
+};
+typedef struct mountres3 mountres3;
+
+typedef char *dirpath;
+
+typedef char *name;
+
+typedef struct mountbody *mountlist;
+
+struct mountbody {
+ name ml_hostname;
+ dirpath ml_directory;
+ mountlist ml_next;
+};
+typedef struct mountbody mountbody;
+
+typedef struct groupnode *groups;
+
+struct groupnode {
+ name gr_name;
+ groups gr_next;
+};
+typedef struct groupnode groupnode;
+
+typedef struct exportnode *exports;
+
+struct exportnode {
+ dirpath ex_dir;
+ groups ex_groups;
+ exports ex_next;
+};
+typedef struct exportnode exportnode;
+
+struct ppathcnf {
+ int pc_link_max;
+ short pc_max_canon;
+ short pc_max_input;
+ short pc_name_max;
+ short pc_path_max;
+ short pc_pipe_buf;
+ uint8_t pc_vdisable;
+ char pc_xxx;
+ short pc_mask[2];
+};
+typedef struct ppathcnf ppathcnf;
+
+#define MOUNTPROG 100005
+#define MOUNTVERS 1
+
+#define MOUNTPROC_NULL 0
+#define MOUNTPROC_MNT 1
+#define MOUNTPROC_DUMP 2
+#define MOUNTPROC_UMNT 3
+#define MOUNTPROC_UMNTALL 4
+#define MOUNTPROC_EXPORT 5
+#define MOUNTPROC_EXPORTALL 6
+
+#define MOUNTVERS_POSIX 2
+
+#define MOUNTPROC_PATHCONF 7
+
+#define MOUNT_V3 3
+
+#define MOUNTPROC3_NULL 0
+#define MOUNTPROC3_MNT 1
+#define MOUNTPROC3_DUMP 2
+#define MOUNTPROC3_UMNT 3
+#define MOUNTPROC3_UMNTALL 4
+#define MOUNTPROC3_EXPORT 5
+
+enum {
+#ifndef NFS_FHSIZE
+ NFS_FHSIZE = 32,
+#endif
+#ifndef NFS_PORT
+ NFS_PORT = 2049
+#endif
+};
+
+/*
+ * We want to be able to compile mount on old kernels in such a way
+ * that the binary will work well on more recent kernels.
+ * Thus, if necessary we teach nfsmount.c the structure of new fields
+ * that will come later.
+ *
+ * Moreover, the new kernel includes conflict with glibc includes
+ * so it is easiest to ignore the kernel altogether (at compile time).
+ */
+
+struct nfs2_fh {
+ char data[32];
+};
+struct nfs3_fh {
+ unsigned short size;
+ unsigned char data[64];
+};
+
+struct nfs_mount_data {
+ int version; /* 1 */
+ int fd; /* 1 */
+ struct nfs2_fh old_root; /* 1 */
+ int flags; /* 1 */
+ int rsize; /* 1 */
+ int wsize; /* 1 */
+ int timeo; /* 1 */
+ int retrans; /* 1 */
+ int acregmin; /* 1 */
+ int acregmax; /* 1 */
+ int acdirmin; /* 1 */
+ int acdirmax; /* 1 */
+ struct sockaddr_in addr; /* 1 */
+ char hostname[256]; /* 1 */
+ int namlen; /* 2 */
+ unsigned int bsize; /* 3 */
+ struct nfs3_fh root; /* 4 */
+};
+
+/* bits in the flags field */
+enum {
+ NFS_MOUNT_SOFT = 0x0001, /* 1 */
+ NFS_MOUNT_INTR = 0x0002, /* 1 */
+ NFS_MOUNT_SECURE = 0x0004, /* 1 */
+ NFS_MOUNT_POSIX = 0x0008, /* 1 */
+ NFS_MOUNT_NOCTO = 0x0010, /* 1 */
+ NFS_MOUNT_NOAC = 0x0020, /* 1 */
+ NFS_MOUNT_TCP = 0x0040, /* 2 */
+ NFS_MOUNT_VER3 = 0x0080, /* 3 */
+ NFS_MOUNT_KERBEROS = 0x0100, /* 3 */
+ NFS_MOUNT_NONLM = 0x0200, /* 3 */
+ NFS_MOUNT_NOACL = 0x0800, /* 4 */
+ NFS_MOUNT_NORDIRPLUS = 0x4000
+};
+
+
+/*
+ * We need to translate between nfs status return values and
+ * the local errno values which may not be the same.
+ *
+ * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno:
+ * "after #include <errno.h> the symbol errno is reserved for any use,
+ * it cannot even be used as a struct tag or field name".
+ */
+#ifndef EDQUOT
+# define EDQUOT ENOSPC
+#endif
+/* Convert each NFSERR_BLAH into EBLAH */
+static const uint8_t nfs_err_stat[] = {
+ 1, 2, 5, 6, 13, 17,
+ 19, 20, 21, 22, 27, 28,
+ 30, 63, 66, 69, 70, 71
+};
+#if ( \
+ EPERM | ENOENT | EIO | ENXIO | EACCES| EEXIST | \
+ ENODEV| ENOTDIR | EISDIR | EINVAL| EFBIG | ENOSPC | \
+ EROFS | ENAMETOOLONG| ENOTEMPTY| EDQUOT| ESTALE| EREMOTE) < 256
+typedef uint8_t nfs_err_type;
+#else
+typedef uint16_t nfs_err_type;
+#endif
+static const nfs_err_type nfs_err_errnum[] = {
+ EPERM , ENOENT , EIO , ENXIO , EACCES, EEXIST,
+ ENODEV, ENOTDIR , EISDIR , EINVAL, EFBIG , ENOSPC,
+ EROFS , ENAMETOOLONG, ENOTEMPTY, EDQUOT, ESTALE, EREMOTE
+};
+static char *nfs_strerror(int status)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(nfs_err_stat); i++) {
+ if (nfs_err_stat[i] == status)
+ return strerror(nfs_err_errnum[i]);
+ }
+ return xasprintf("unknown nfs status return value: %d", status);
+}
+
+static bool_t xdr_fhandle(XDR *xdrs, fhandle objp)
+{
+ return xdr_opaque(xdrs, objp, FHSIZE);
+}
+
+static bool_t xdr_fhstatus(XDR *xdrs, fhstatus *objp)
+{
+ if (!xdr_u_int(xdrs, &objp->fhs_status))
+ return FALSE;
+ if (objp->fhs_status == 0)
+ return xdr_fhandle(xdrs, objp->fhstatus_u.fhs_fhandle);
+ return TRUE;
+}
+
+static bool_t xdr_dirpath(XDR *xdrs, dirpath *objp)
+{
+ return xdr_string(xdrs, objp, MNTPATHLEN);
+}
+
+static bool_t xdr_fhandle3(XDR *xdrs, fhandle3 *objp)
+{
+ return xdr_bytes(xdrs, (char **)&objp->fhandle3_val,
+ (unsigned int *) &objp->fhandle3_len,
+ FHSIZE3);
+}
+
+static bool_t xdr_mountres3_ok(XDR *xdrs, mountres3_ok *objp)
+{
+ if (!xdr_fhandle3(xdrs, &objp->fhandle))
+ return FALSE;
+ return xdr_array(xdrs, &(objp->auth_flavours.auth_flavours_val),
+ &(objp->auth_flavours.auth_flavours_len),
+ ~0,
+ sizeof(int),
+ (xdrproc_t) xdr_int);
+}
+
+static bool_t xdr_mountstat3(XDR *xdrs, mountstat3 *objp)
+{
+ return xdr_enum(xdrs, (enum_t *) objp);
+}
+
+static bool_t xdr_mountres3(XDR *xdrs, mountres3 *objp)
+{
+ if (!xdr_mountstat3(xdrs, &objp->fhs_status))
+ return FALSE;
+ if (objp->fhs_status == MNT_OK)
+ return xdr_mountres3_ok(xdrs, &objp->mountres3_u.mountinfo);
+ return TRUE;
+}
+
+#define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
+
+/*
+ * Unfortunately, the kernel prints annoying console messages
+ * in case of an unexpected nfs mount version (instead of
+ * just returning some error). Therefore we'll have to try
+ * and figure out what version the kernel expects.
+ *
+ * Variables:
+ * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time
+ * NFS_MOUNT_VERSION: these nfsmount sources at compile time
+ * nfs_mount_version: version this source and running kernel can handle
+ */
+static void
+find_kernel_nfs_mount_version(void)
+{
+ int kernel_version;
+
+ if (nfs_mount_version)
+ return;
+
+ nfs_mount_version = 4; /* default */
+
+ kernel_version = get_linux_version_code();
+ if (kernel_version) {
+ if (kernel_version < KERNEL_VERSION(2,2,18))
+ nfs_mount_version = 3;
+ /* else v4 since 2.3.99pre4 */
+ }
+}
+
+static void
+get_mountport(struct pmap *pm_mnt,
+ struct sockaddr_in *server_addr,
+ long unsigned prog,
+ long unsigned version,
+ long unsigned proto,
+ long unsigned port)
+{
+ struct pmaplist *pmap;
+
+ server_addr->sin_port = PMAPPORT;
+/* glibc 2.4 (still) has pmap_getmaps(struct sockaddr_in *).
+ * I understand it like "IPv6 for this is not 100% ready" */
+ pmap = pmap_getmaps(server_addr);
+
+ if (version > MAX_NFSPROT)
+ version = MAX_NFSPROT;
+ if (!prog)
+ prog = MOUNTPROG;
+ pm_mnt->pm_prog = prog;
+ pm_mnt->pm_vers = version;
+ pm_mnt->pm_prot = proto;
+ pm_mnt->pm_port = port;
+
+ while (pmap) {
+ if (pmap->pml_map.pm_prog != prog)
+ goto next;
+ if (!version && pm_mnt->pm_vers > pmap->pml_map.pm_vers)
+ goto next;
+ if (version > 2 && pmap->pml_map.pm_vers != version)
+ goto next;
+ if (version && version <= 2 && pmap->pml_map.pm_vers > 2)
+ goto next;
+ if (pmap->pml_map.pm_vers > MAX_NFSPROT
+ || (proto && pm_mnt->pm_prot && pmap->pml_map.pm_prot != proto)
+ || (port && pmap->pml_map.pm_port != port)
+ ) {
+ goto next;
+ }
+ memcpy(pm_mnt, &pmap->pml_map, sizeof(*pm_mnt));
+ next:
+ pmap = pmap->pml_next;
+ }
+ if (!pm_mnt->pm_vers)
+ pm_mnt->pm_vers = MOUNTVERS;
+ if (!pm_mnt->pm_port)
+ pm_mnt->pm_port = MOUNTPORT;
+ if (!pm_mnt->pm_prot)
+ pm_mnt->pm_prot = IPPROTO_TCP;
+}
+
+#if BB_MMU
+static int daemonize(void)
+{
+ int pid = fork();
+ if (pid < 0) /* error */
+ return -errno;
+ if (pid > 0) /* parent */
+ return 0;
+ /* child */
+ close(0);
+ xopen(bb_dev_null, O_RDWR);
+ xdup2(0, 1);
+ xdup2(0, 2);
+ setsid();
+ openlog(applet_name, LOG_PID, LOG_DAEMON);
+ logmode = LOGMODE_SYSLOG;
+ return 1;
+}
+#else
+static inline int daemonize(void) { return -ENOSYS; }
+#endif
+
+/* TODO */
+static inline int we_saw_this_host_before(const char *hostname UNUSED_PARAM)
+{
+ return 0;
+}
+
+/* RPC strerror analogs are terminally idiotic:
+ * *mandatory* prefix and \n at end.
+ * This hopefully helps. Usage:
+ * error_msg_rpc(clnt_*error*(" ")) */
+static void error_msg_rpc(const char *msg)
+{
+ int len;
+ while (msg[0] == ' ' || msg[0] == ':') msg++;
+ len = strlen(msg);
+ while (len && msg[len-1] == '\n') len--;
+ bb_error_msg("%.*s", len, msg);
+}
+
+/* NB: mp->xxx fields may be trashed on exit */
+static NOINLINE int nfsmount(struct mntent *mp, unsigned long vfsflags, char *filteropts)
+{
+ CLIENT *mclient;
+ char *hostname;
+ char *pathname;
+ char *mounthost;
+ /* prior to 2.6.23, kernel took NFS options in a form of this struct
+ * only. 2.6.23+ looks at data->version, and if it's not 1..6,
+ * then data pointer is interpreted as a string. */
+ struct nfs_mount_data data;
+ char *opt;
+ struct hostent *hp;
+ struct sockaddr_in server_addr;
+ struct sockaddr_in mount_server_addr;
+ int msock, fsock;
+ union {
+ struct fhstatus nfsv2;
+ struct mountres3 nfsv3;
+ } status;
+ int daemonized;
+ char *s;
+ int port;
+ int mountport;
+ int proto;
+#if BB_MMU
+ smallint bg = 0;
+#else
+ enum { bg = 0 };
+#endif
+ int retry;
+ int mountprog;
+ int mountvers;
+ int nfsprog;
+ int nfsvers;
+ int retval;
+ /* these all are one-bit really. gcc 4.3.1 likes this combination: */
+ smallint tcp;
+ smallint soft;
+ int intr;
+ int posix;
+ int nocto;
+ int noac;
+ int nordirplus;
+ int nolock;
+ int noacl;
+
+ find_kernel_nfs_mount_version();
+
+ daemonized = 0;
+ mounthost = NULL;
+ retval = ETIMEDOUT;
+ msock = fsock = -1;
+ mclient = NULL;
+
+ /* NB: hostname, mounthost, filteropts must be free()d prior to return */
+
+ filteropts = xstrdup(filteropts); /* going to trash it later... */
+
+ hostname = xstrdup(mp->mnt_fsname);
+ /* mount_main() guarantees that ':' is there */
+ s = strchr(hostname, ':');
+ pathname = s + 1;
+ *s = '\0';
+ /* Ignore all but first hostname in replicated mounts
+ * until they can be fully supported. (mack@sgi.com) */
+ s = strchr(hostname, ',');
+ if (s) {
+ *s = '\0';
+ bb_error_msg("warning: multiple hostnames not supported");
+ }
+
+ server_addr.sin_family = AF_INET;
+ if (!inet_aton(hostname, &server_addr.sin_addr)) {
+ hp = gethostbyname(hostname);
+ if (hp == NULL) {
+ bb_herror_msg("%s", hostname);
+ goto fail;
+ }
+ if (hp->h_length != (int)sizeof(struct in_addr)) {
+ bb_error_msg_and_die("only IPv4 is supported");
+ }
+ memcpy(&server_addr.sin_addr, hp->h_addr_list[0], sizeof(struct in_addr));
+ }
+
+ memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr));
+
+ /* add IP address to mtab options for use when unmounting */
+
+ if (!mp->mnt_opts) { /* TODO: actually mp->mnt_opts is never NULL */
+ mp->mnt_opts = xasprintf("addr=%s", inet_ntoa(server_addr.sin_addr));
+ } else {
+ char *tmp = xasprintf("%s%saddr=%s", mp->mnt_opts,
+ mp->mnt_opts[0] ? "," : "",
+ inet_ntoa(server_addr.sin_addr));
+ free(mp->mnt_opts);
+ mp->mnt_opts = tmp;
+ }
+
+ /* Set default options.
+ * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
+ * let the kernel decide.
+ * timeo is filled in after we know whether it'll be TCP or UDP. */
+ memset(&data, 0, sizeof(data));
+ data.retrans = 3;
+ data.acregmin = 3;
+ data.acregmax = 60;
+ data.acdirmin = 30;
+ data.acdirmax = 60;
+ data.namlen = NAME_MAX;
+
+ soft = 0;
+ intr = 0;
+ posix = 0;
+ nocto = 0;
+ nolock = 0;
+ noac = 0;
+ nordirplus = 0;
+ noacl = 0;
+ retry = 10000; /* 10000 minutes ~ 1 week */
+ tcp = 1; /* nfs-utils uses tcp per default */
+
+ mountprog = MOUNTPROG;
+ mountvers = 0;
+ port = 0;
+ mountport = 0;
+ nfsprog = 100003;
+ nfsvers = 0;
+
+ /* parse options */
+ if (filteropts) for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) {
+ char *opteq = strchr(opt, '=');
+ if (opteq) {
+ int val, idx;
+ static const char options[] ALIGN1 =
+ /* 0 */ "rsize\0"
+ /* 1 */ "wsize\0"
+ /* 2 */ "timeo\0"
+ /* 3 */ "retrans\0"
+ /* 4 */ "acregmin\0"
+ /* 5 */ "acregmax\0"
+ /* 6 */ "acdirmin\0"
+ /* 7 */ "acdirmax\0"
+ /* 8 */ "actimeo\0"
+ /* 9 */ "retry\0"
+ /* 10 */ "port\0"
+ /* 11 */ "mountport\0"
+ /* 12 */ "mounthost\0"
+ /* 13 */ "mountprog\0"
+ /* 14 */ "mountvers\0"
+ /* 15 */ "nfsprog\0"
+ /* 16 */ "nfsvers\0"
+ /* 17 */ "vers\0"
+ /* 18 */ "proto\0"
+ /* 19 */ "namlen\0"
+ /* 20 */ "addr\0";
+
+ *opteq++ = '\0';
+ idx = index_in_strings(options, opt);
+ switch (idx) {
+ case 12: // "mounthost"
+ mounthost = xstrndup(opteq,
+ strcspn(opteq, " \t\n\r,"));
+ continue;
+ case 18: // "proto"
+ if (!strncmp(opteq, "tcp", 3))
+ tcp = 1;
+ else if (!strncmp(opteq, "udp", 3))
+ tcp = 0;
+ else
+ bb_error_msg("warning: unrecognized proto= option");
+ continue;
+ case 20: // "addr" - ignore
+ continue;
+ case -1: // unknown
+ if (vfsflags & MS_REMOUNT)
+ continue;
+ }
+
+ val = xatoi_positive(opteq);
+ switch (idx) {
+ case 0: // "rsize"
+ data.rsize = val;
+ continue;
+ case 1: // "wsize"
+ data.wsize = val;
+ continue;
+ case 2: // "timeo"
+ data.timeo = val;
+ continue;
+ case 3: // "retrans"
+ data.retrans = val;
+ continue;
+ case 4: // "acregmin"
+ data.acregmin = val;
+ continue;
+ case 5: // "acregmax"
+ data.acregmax = val;
+ continue;
+ case 6: // "acdirmin"
+ data.acdirmin = val;
+ continue;
+ case 7: // "acdirmax"
+ data.acdirmax = val;
+ continue;
+ case 8: // "actimeo"
+ data.acregmin = val;
+ data.acregmax = val;
+ data.acdirmin = val;
+ data.acdirmax = val;
+ continue;
+ case 9: // "retry"
+ retry = val;
+ continue;
+ case 10: // "port"
+ port = val;
+ continue;
+ case 11: // "mountport"
+ mountport = val;
+ continue;
+ case 13: // "mountprog"
+ mountprog = val;
+ continue;
+ case 14: // "mountvers"
+ mountvers = val;
+ continue;
+ case 15: // "nfsprog"
+ nfsprog = val;
+ continue;
+ case 16: // "nfsvers"
+ case 17: // "vers"
+ nfsvers = val;
+ continue;
+ case 19: // "namlen"
+ //if (nfs_mount_version >= 2)
+ data.namlen = val;
+ //else
+ // bb_error_msg("warning: option namlen is not supported\n");
+ continue;
+ default:
+ bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val);
+ goto fail;
+ }
+ }
+ else { /* not of the form opt=val */
+ static const char options[] ALIGN1 =
+ "bg\0"
+ "fg\0"
+ "soft\0"
+ "hard\0"
+ "intr\0"
+ "posix\0"
+ "cto\0"
+ "ac\0"
+ "tcp\0"
+ "udp\0"
+ "lock\0"
+ "rdirplus\0"
+ "acl\0";
+ int val = 1;
+ if (!strncmp(opt, "no", 2)) {
+ val = 0;
+ opt += 2;
+ }
+ switch (index_in_strings(options, opt)) {
+ case 0: // "bg"
+#if BB_MMU
+ bg = val;
+#endif
+ break;
+ case 1: // "fg"
+#if BB_MMU
+ bg = !val;
+#endif
+ break;
+ case 2: // "soft"
+ soft = val;
+ break;
+ case 3: // "hard"
+ soft = !val;
+ break;
+ case 4: // "intr"
+ intr = val;
+ break;
+ case 5: // "posix"
+ posix = val;
+ break;
+ case 6: // "cto"
+ nocto = !val;
+ break;
+ case 7: // "ac"
+ noac = !val;
+ break;
+ case 8: // "tcp"
+ tcp = val;
+ break;
+ case 9: // "udp"
+ tcp = !val;
+ break;
+ case 10: // "lock"
+ if (nfs_mount_version >= 3)
+ nolock = !val;
+ else
+ bb_error_msg("warning: option nolock is not supported");
+ break;
+ case 11: //rdirplus
+ nordirplus = !val;
+ break;
+ case 12: // acl
+ noacl = !val;
+ break;
+ default:
+ bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt);
+ goto fail;
+ }
+ }
+ }
+ proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP;
+
+ data.flags = (soft ? NFS_MOUNT_SOFT : 0)
+ | (intr ? NFS_MOUNT_INTR : 0)
+ | (posix ? NFS_MOUNT_POSIX : 0)
+ | (nocto ? NFS_MOUNT_NOCTO : 0)
+ | (noac ? NFS_MOUNT_NOAC : 0)
+ | (nordirplus ? NFS_MOUNT_NORDIRPLUS : 0)
+ | (noacl ? NFS_MOUNT_NOACL : 0);
+ if (nfs_mount_version >= 2)
+ data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
+ if (nfs_mount_version >= 3)
+ data.flags |= (nolock ? NFS_MOUNT_NONLM : 0);
+ if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) {
+ bb_error_msg("NFSv%d not supported", nfsvers);
+ goto fail;
+ }
+ if (nfsvers && !mountvers)
+ mountvers = (nfsvers < 3) ? 1 : nfsvers;
+ if (nfsvers && nfsvers < mountvers) {
+ mountvers = nfsvers;
+ }
+
+ /* Adjust options if none specified */
+ if (!data.timeo)
+ data.timeo = tcp ? 70 : 7;
+
+ data.version = nfs_mount_version;
+
+ if (vfsflags & MS_REMOUNT)
+ goto do_mount;
+
+ /*
+ * If the previous mount operation on the same host was
+ * backgrounded, and the "bg" for this mount is also set,
+ * give up immediately, to avoid the initial timeout.
+ */
+ if (bg && we_saw_this_host_before(hostname)) {
+ daemonized = daemonize();
+ if (daemonized <= 0) { /* parent or error */
+ retval = -daemonized;
+ goto ret;
+ }
+ }
+
+ /* Create mount daemon client */
+ /* See if the nfs host = mount host. */
+ if (mounthost) {
+ if (mounthost[0] >= '0' && mounthost[0] <= '9') {
+ mount_server_addr.sin_family = AF_INET;
+ mount_server_addr.sin_addr.s_addr = inet_addr(hostname);
+ } else {
+ hp = gethostbyname(mounthost);
+ if (hp == NULL) {
+ bb_herror_msg("%s", mounthost);
+ goto fail;
+ }
+ if (hp->h_length != (int)sizeof(struct in_addr)) {
+ bb_error_msg_and_die("only IPv4 is supported");
+ }
+ mount_server_addr.sin_family = AF_INET;
+ memcpy(&mount_server_addr.sin_addr, hp->h_addr_list[0], sizeof(struct in_addr));
+ }
+ }
+
+ /*
+ * The following loop implements the mount retries. When the mount
+ * times out, and the "bg" option is set, we background ourself
+ * and continue trying.
+ *
+ * The case where the mount point is not present and the "bg"
+ * option is set, is treated as a timeout. This is done to
+ * support nested mounts.
+ *
+ * The "retry" count specified by the user is the number of
+ * minutes to retry before giving up.
+ */
+ {
+ struct timeval total_timeout;
+ struct timeval retry_timeout;
+ struct pmap pm_mnt;
+ time_t t;
+ time_t prevt;
+ time_t timeout;
+
+ retry_timeout.tv_sec = 3;
+ retry_timeout.tv_usec = 0;
+ total_timeout.tv_sec = 20;
+ total_timeout.tv_usec = 0;
+/* FIXME: use monotonic()? */
+ timeout = time(NULL) + 60 * retry;
+ prevt = 0;
+ t = 30;
+ retry:
+ /* Be careful not to use too many CPU cycles */
+ if (t - prevt < 30)
+ sleep(30);
+
+ get_mountport(&pm_mnt, &mount_server_addr,
+ mountprog,
+ mountvers,
+ proto,
+ mountport);
+ nfsvers = (pm_mnt.pm_vers < 2) ? 2 : pm_mnt.pm_vers;
+
+ /* contact the mount daemon via TCP */
+ mount_server_addr.sin_port = htons(pm_mnt.pm_port);
+ msock = RPC_ANYSOCK;
+
+ switch (pm_mnt.pm_prot) {
+ case IPPROTO_UDP:
+ mclient = clntudp_create(&mount_server_addr,
+ pm_mnt.pm_prog,
+ pm_mnt.pm_vers,
+ retry_timeout,
+ &msock);
+ if (mclient)
+ break;
+ mount_server_addr.sin_port = htons(pm_mnt.pm_port);
+ msock = RPC_ANYSOCK;
+ case IPPROTO_TCP:
+ mclient = clnttcp_create(&mount_server_addr,
+ pm_mnt.pm_prog,
+ pm_mnt.pm_vers,
+ &msock, 0, 0);
+ break;
+ default:
+ mclient = NULL;
+ }
+ if (!mclient) {
+ if (!daemonized && prevt == 0)
+ error_msg_rpc(clnt_spcreateerror(" "));
+ } else {
+ enum clnt_stat clnt_stat;
+
+ /* Try to mount hostname:pathname */
+ mclient->cl_auth = authunix_create_default();
+
+ /* Make pointers in xdr_mountres3 NULL so
+ * that xdr_array allocates memory for us
+ */
+ memset(&status, 0, sizeof(status));
+
+ if (pm_mnt.pm_vers == 3)
+ clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT,
+ (xdrproc_t) xdr_dirpath,
+ (caddr_t) &pathname,
+ (xdrproc_t) xdr_mountres3,
+ (caddr_t) &status,
+ total_timeout);
+ else
+ clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
+ (xdrproc_t) xdr_dirpath,
+ (caddr_t) &pathname,
+ (xdrproc_t) xdr_fhstatus,
+ (caddr_t) &status,
+ total_timeout);
+
+ if (clnt_stat == RPC_SUCCESS)
+ goto prepare_kernel_data; /* we're done */
+ if (errno != ECONNREFUSED) {
+ error_msg_rpc(clnt_sperror(mclient, " "));
+ goto fail; /* don't retry */
+ }
+ /* Connection refused */
+ if (!daemonized && prevt == 0) /* print just once */
+ error_msg_rpc(clnt_sperror(mclient, " "));
+ auth_destroy(mclient->cl_auth);
+ clnt_destroy(mclient);
+ mclient = NULL;
+ close(msock);
+ msock = -1;
+ }
+
+ /* Timeout. We are going to retry... maybe */
+ if (!bg)
+ goto fail;
+ if (!daemonized) {
+ daemonized = daemonize();
+ if (daemonized <= 0) { /* parent or error */
+ retval = -daemonized;
+ goto ret;
+ }
+ }
+ prevt = t;
+ t = time(NULL);
+ if (t >= timeout)
+ /* TODO error message */
+ goto fail;
+
+ goto retry;
+ }
+
+ prepare_kernel_data:
+
+ if (nfsvers == 2) {
+ if (status.nfsv2.fhs_status != 0) {
+ bb_error_msg("%s:%s failed, reason given by server: %s",
+ hostname, pathname,
+ nfs_strerror(status.nfsv2.fhs_status));
+ goto fail;
+ }
+ memcpy(data.root.data,
+ (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
+ NFS_FHSIZE);
+ data.root.size = NFS_FHSIZE;
+ memcpy(data.old_root.data,
+ (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
+ NFS_FHSIZE);
+ } else {
+ fhandle3 *my_fhandle;
+ if (status.nfsv3.fhs_status != 0) {
+ bb_error_msg("%s:%s failed, reason given by server: %s",
+ hostname, pathname,
+ nfs_strerror(status.nfsv3.fhs_status));
+ goto fail;
+ }
+ my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle;
+ memset(data.old_root.data, 0, NFS_FHSIZE);
+ memset(&data.root, 0, sizeof(data.root));
+ data.root.size = my_fhandle->fhandle3_len;
+ memcpy(data.root.data,
+ (char *) my_fhandle->fhandle3_val,
+ my_fhandle->fhandle3_len);
+
+ data.flags |= NFS_MOUNT_VER3;
+ }
+
+ /* Create nfs socket for kernel */
+ if (tcp) {
+ if (nfs_mount_version < 3) {
+ bb_error_msg("NFS over TCP is not supported");
+ goto fail;
+ }
+ fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+ } else
+ fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if (fsock < 0) {
+ bb_perror_msg("nfs socket");
+ goto fail;
+ }
+ if (bindresvport(fsock, 0) < 0) {
+ bb_perror_msg("nfs bindresvport");
+ goto fail;
+ }
+ if (port == 0) {
+ server_addr.sin_port = PMAPPORT;
+ port = pmap_getport(&server_addr, nfsprog, nfsvers,
+ tcp ? IPPROTO_TCP : IPPROTO_UDP);
+ if (port == 0)
+ port = NFS_PORT;
+ }
+ server_addr.sin_port = htons(port);
+
+ /* Prepare data structure for kernel */
+ data.fd = fsock;
+ memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
+ strncpy(data.hostname, hostname, sizeof(data.hostname));
+
+ /* Clean up */
+ auth_destroy(mclient->cl_auth);
+ clnt_destroy(mclient);
+ close(msock);
+ msock = -1;
+
+ if (bg) {
+ /* We must wait until mount directory is available */
+ struct stat statbuf;
+ int delay = 1;
+ while (stat(mp->mnt_dir, &statbuf) == -1) {
+ if (!daemonized) {
+ daemonized = daemonize();
+ if (daemonized <= 0) { /* parent or error */
+/* FIXME: parent doesn't close fsock - ??! */
+ retval = -daemonized;
+ goto ret;
+ }
+ }
+ sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */
+ delay *= 2;
+ if (delay > 30)
+ delay = 30;
+ }
+ }
+
+ /* Perform actual mount */
+ do_mount:
+ retval = mount_it_now(mp, vfsflags, (char*)&data);
+ goto ret;
+
+ /* Abort */
+ fail:
+ if (msock >= 0) {
+ if (mclient) {
+ auth_destroy(mclient->cl_auth);
+ clnt_destroy(mclient);
+ }
+ close(msock);
+ }
+ if (fsock >= 0)
+ close(fsock);
+
+ ret:
+ free(hostname);
+ free(mounthost);
+ free(filteropts);
+ return retval;
+}
+
+#else // !ENABLE_FEATURE_MOUNT_NFS
+
+/* Linux 2.6.23+ supports nfs mounts with options passed as a string.
+ * For older kernels, you must build busybox with ENABLE_FEATURE_MOUNT_NFS.
+ * (However, note that then you lose any chances that NFS over IPv6 would work).
+ */
+static int nfsmount(struct mntent *mp, unsigned long vfsflags, char *filteropts)
+{
+ len_and_sockaddr *lsa;
+ char *opts;
+ char *end;
+ char *dotted;
+ int ret;
+
+# if ENABLE_FEATURE_IPV6
+ end = strchr(mp->mnt_fsname, ']');
+ if (end && end[1] == ':')
+ end++;
+ else
+# endif
+ /* mount_main() guarantees that ':' is there */
+ end = strchr(mp->mnt_fsname, ':');
+
+ *end = '\0';
+ lsa = xhost2sockaddr(mp->mnt_fsname, /*port:*/ 0);
+ *end = ':';
+ dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
+ if (ENABLE_FEATURE_CLEAN_UP) free(lsa);
+ opts = xasprintf("%s%saddr=%s",
+ filteropts ? filteropts : "",
+ filteropts ? "," : "",
+ dotted
+ );
+ if (ENABLE_FEATURE_CLEAN_UP) free(dotted);
+ ret = mount_it_now(mp, vfsflags, opts);
+ if (ENABLE_FEATURE_CLEAN_UP) free(opts);
+
+ return ret;
+}
+
+#endif // !ENABLE_FEATURE_MOUNT_NFS
+
+// Mount one directory. Handles CIFS, NFS, loopback, autobind, and filesystem
+// type detection. Returns 0 for success, nonzero for failure.
+// NB: mp->xxx fields may be trashed on exit
+static int singlemount(struct mntent *mp, int ignore_busy)
+{
+ int rc = -1;
+ unsigned long vfsflags;
+ char *loopFile = NULL, *filteropts = NULL;
+ llist_t *fl = NULL;
+ struct stat st;
+
+ errno = 0;
+
+ vfsflags = parse_mount_options(mp->mnt_opts, &filteropts);
+
+ // Treat fstype "auto" as unspecified
+ if (mp->mnt_type && strcmp(mp->mnt_type, "auto") == 0)
+ mp->mnt_type = NULL;
+
+ // Might this be a virtual filesystem?
+ if (ENABLE_FEATURE_MOUNT_HELPERS && strchr(mp->mnt_fsname, '#')) {
+ char *args[35];
+ char *s;
+ int n;
+ // fsname: "cmd#arg1#arg2..."
+ // WARNING: allows execution of arbitrary commands!
+ // Try "mount 'sh#-c#sh' bogus_dir".
+ // It is safe ONLY because non-root
+ // cannot use two-argument mount command
+ // and using one-argument "mount 'sh#-c#sh'" doesn't work:
+ // "mount: can't find sh#-c#sh in /etc/fstab"
+ // (if /etc/fstab has it, it's ok: root sets up /etc/fstab).
+
+ s = mp->mnt_fsname;
+ n = 0;
+ args[n++] = s;
+ while (*s && n < 35 - 2) {
+ if (*s++ == '#' && *s != '#') {
+ s[-1] = '\0';
+ args[n++] = s;
+ }
+ }
+ args[n++] = mp->mnt_dir;
+ args[n] = NULL;
+ rc = spawn_and_wait(args);
+ goto report_error;
+ }
+
+ // Might this be an CIFS filesystem?
+ if (ENABLE_FEATURE_MOUNT_CIFS
+ && (!mp->mnt_type || strcmp(mp->mnt_type, "cifs") == 0)
+ && (mp->mnt_fsname[0] == '/' || mp->mnt_fsname[0] == '\\')
+ && mp->mnt_fsname[0] == mp->mnt_fsname[1]
+ ) {
+ int len;
+ char c;
+ char *hostname, *share;
+ char *dotted, *ip;
+ len_and_sockaddr *lsa;
+
+ // Parse mp->mnt_fsname of the form "//hostname/share[/dir1/dir2]"
+
+ hostname = mp->mnt_fsname + 2;
+ len = strcspn(hostname, "/\\");
+ share = hostname + len + 1;
+ if (len == 0 // 3rd char is a [back]slash (IOW: empty hostname)
+ || share[-1] == '\0' // no [back]slash after hostname
+ || share[0] == '\0' // empty share name
+ ) {
+ goto report_error;
+ }
+ c = share[-1];
+ share[-1] = '\0';
+ len = strcspn(share, "/\\");
+
+ // "unc=\\hostname\share" option is mandatory
+ // after CIFS option parsing was rewritten in Linux 3.4.
+ // Must use backslashes.
+ // If /dir1/dir2 is present, also add "prefixpath=dir1/dir2"
+ {
+ char *unc = xasprintf(
+ share[len] != '\0' /* "/dir1/dir2" exists? */
+ ? "unc=\\\\%s\\%.*s,prefixpath=%s"
+ : "unc=\\\\%s\\%.*s",
+ hostname,
+ len, share,
+ share + len + 1 /* "dir1/dir2" */
+ );
+ parse_mount_options(unc, &filteropts);
+ if (ENABLE_FEATURE_CLEAN_UP) free(unc);
+ }
+
+ lsa = host2sockaddr(hostname, 0);
+ share[-1] = c;
+ if (!lsa)
+ goto report_error;
+
+ // Insert "ip=..." option into options
+ dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
+ if (ENABLE_FEATURE_CLEAN_UP) free(lsa);
+ ip = xasprintf("ip=%s", dotted);
+ if (ENABLE_FEATURE_CLEAN_UP) free(dotted);
+ parse_mount_options(ip, &filteropts);
+ if (ENABLE_FEATURE_CLEAN_UP) free(ip);
+
+ mp->mnt_type = (char*)"cifs";
+ rc = mount_it_now(mp, vfsflags, filteropts);
+
+ goto report_error;
+ }
+
+ // Might this be an NFS filesystem?
+ if ((!mp->mnt_type || strncmp(mp->mnt_type, "nfs", 3) == 0)
+ && strchr(mp->mnt_fsname, ':') != NULL
+ ) {
+ if (!mp->mnt_type)
+ mp->mnt_type = (char*)"nfs";
+ rc = nfsmount(mp, vfsflags, filteropts);
+ goto report_error;
+ }
+
+ // Look at the file. (Not found isn't a failure for remount, or for
+ // a synthetic filesystem like proc or sysfs.)
+ // (We use stat, not lstat, in order to allow
+ // mount symlink_to_file_or_blkdev dir)
+ if (!stat(mp->mnt_fsname, &st)
+ && !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))
+ ) {
+ // Do we need to allocate a loopback device for it?
+ if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) {
+ loopFile = bb_simplify_path(mp->mnt_fsname);
+ mp->mnt_fsname = NULL; // will receive malloced loop dev name
+ if (set_loop(&mp->mnt_fsname, loopFile, 0, /*ro:*/ (vfsflags & MS_RDONLY)) < 0) {
+ if (errno == EPERM || errno == EACCES)
+ bb_error_msg(bb_msg_perm_denied_are_you_root);
+ else
+ bb_perror_msg("can't setup loop device");
+ return errno;
+ }
+
+ // Autodetect bind mounts
+ } else if (S_ISDIR(st.st_mode) && !mp->mnt_type)
+ vfsflags |= MS_BIND;
+ }
+
+ // If we know the fstype (or don't need to), jump straight
+ // to the actual mount.
+ if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))) {
+ char *next;
+ for (;;) {
+ next = mp->mnt_type ? strchr(mp->mnt_type, ',') : NULL;
+ if (next)
+ *next = '\0';
+ rc = mount_it_now(mp, vfsflags, filteropts);
+ if (rc == 0 || !next)
+ break;
+ mp->mnt_type = next + 1;
+ }
+ } else {
+ // Loop through filesystem types until mount succeeds
+ // or we run out
+
+ // Initialize list of block backed filesystems.
+ // This has to be done here so that during "mount -a",
+ // mounts after /proc shows up can autodetect.
+ if (!fslist) {
+ fslist = get_block_backed_filesystems();
+ if (ENABLE_FEATURE_CLEAN_UP && fslist)
+ atexit(delete_block_backed_filesystems);
+ }
+
+ for (fl = fslist; fl; fl = fl->link) {
+ mp->mnt_type = fl->data;
+ rc = mount_it_now(mp, vfsflags, filteropts);
+ if (rc == 0)
+ break;
+ }
+ }
+
+ // If mount failed, clean up loop file (if any).
+ if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) {
+ del_loop(mp->mnt_fsname);
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(loopFile);
+ free(mp->mnt_fsname);
+ }
+ }
+
+ report_error:
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(filteropts);
+
+ if (errno == EBUSY && ignore_busy)
+ return 0;
+ if (rc != 0)
+ bb_perror_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
+ return rc;
+}
+
+// -O support
+// -O interprets a list of filter options which select whether a mount
+// point will be mounted: only mounts with options matching *all* filtering
+// options will be selected.
+// By default each -O filter option must be present in the list of mount
+// options, but if it is prefixed by "no" then it must be absent.
+// For example,
+// -O a,nob,c matches -o a,c but fails to match -o a,b,c
+// (and also fails to match -o a because -o c is absent).
+//
+// It is different from -t in that each option is matched exactly; a leading
+// "no" at the beginning of one option does not negate the rest.
+static int match_opt(const char *fs_opt_in, const char *O_opt)
+{
+ if (!O_opt)
+ return 1;
+
+ while (*O_opt) {
+ const char *fs_opt = fs_opt_in;
+ int O_len;
+ int match;
+
+ // If option begins with "no" then treat as an inverted match:
+ // matching is a failure
+ match = 0;
+ if (O_opt[0] == 'n' && O_opt[1] == 'o') {
+ match = 1;
+ O_opt += 2;
+ }
+ // Isolate the current O option
+ O_len = strchrnul(O_opt, ',') - O_opt;
+ // Check for a match against existing options
+ while (1) {
+ if (strncmp(fs_opt, O_opt, O_len) == 0
+ && (fs_opt[O_len] == '\0' || fs_opt[O_len] == ',')
+ ) {
+ if (match)
+ return 0; // "no" prefix, but option found
+ match = 1; // current O option found, go check next one
+ break;
+ }
+ fs_opt = strchr(fs_opt, ',');
+ if (!fs_opt)
+ break;
+ fs_opt++;
+ }
+ if (match == 0)
+ return 0; // match wanted but not found
+ if (O_opt[O_len] == '\0') // end?
+ break;
+ // Step to the next O option
+ O_opt += O_len + 1;
+ }
+ // If we get here then everything matched
+ return 1;
+}
+
+// Parse options, if necessary parse fstab/mtab, and call singlemount for
+// each directory to be mounted.
+int mount_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int mount_main(int argc UNUSED_PARAM, char **argv)
+{
+ char *cmdopts = xzalloc(1);
+ char *fstype = NULL;
+ char *O_optmatch = NULL;
+ char *storage_path;
+ llist_t *lst_o = NULL;
+ const char *fstabname;
+ FILE *fstab;
+ int i, j;
+ int rc = EXIT_SUCCESS;
+ unsigned long cmdopt_flags;
+ unsigned opt;
+ struct mntent mtpair[2], *mtcur = mtpair;
+ IF_NOT_DESKTOP(const int nonroot = 0;)
+
+ IF_DESKTOP(int nonroot = ) sanitize_env_if_suid();
+
+ INIT_G();
+
+ // Parse long options, like --bind and --move. Note that -o option
+ // and --option are synonymous. Yes, this means --remount,rw works.
+ for (i = j = 1; argv[i]; i++) {
+ if (argv[i][0] == '-' && argv[i][1] == '-')
+ append_mount_options(&cmdopts, argv[i] + 2);
+ else
+ argv[j++] = argv[i];
+ }
+ argv[j] = NULL;
+
+ // Parse remaining options
+ // Max 2 params; -o is a list, -v is a counter
+ opt_complementary = "?2o::" IF_FEATURE_MOUNT_VERBOSE("vv");
+ opt = getopt32(argv, OPTION_STR, &lst_o, &fstype, &O_optmatch
+ IF_FEATURE_MOUNT_VERBOSE(, &verbose));
+ while (lst_o) append_mount_options(&cmdopts, llist_pop(&lst_o)); // -o
+ if (opt & OPT_r) append_mount_options(&cmdopts, "ro"); // -r
+ if (opt & OPT_w) append_mount_options(&cmdopts, "rw"); // -w
+ argv += optind;
+
+ // If we have no arguments, show currently mounted filesystems
+ if (!argv[0]) {
+ if (!(opt & OPT_a)) {
+ FILE *mountTable = setmntent(bb_path_mtab_file, "r");
+
+ if (!mountTable)
+ bb_error_msg_and_die("no %s", bb_path_mtab_file);
+
+ while (getmntent_r(mountTable, &mtpair[0], getmntent_buf,
+ GETMNTENT_BUFSIZE))
+ {
+ // Don't show rootfs. FIXME: why??
+ // util-linux 2.12a happily shows rootfs...
+ //if (strcmp(mtpair->mnt_fsname, "rootfs") == 0) continue;
+
+ if (!fstype || strcmp(mtpair->mnt_type, fstype) == 0)
+ printf("%s on %s type %s (%s)\n", mtpair->mnt_fsname,
+ mtpair->mnt_dir, mtpair->mnt_type,
+ mtpair->mnt_opts);
+ }
+ if (ENABLE_FEATURE_CLEAN_UP)
+ endmntent(mountTable);
+ return EXIT_SUCCESS;
+ }
+ storage_path = NULL;
+ } else {
+ // When we have two arguments, the second is the directory and we can
+ // skip looking at fstab entirely. We can always abspath() the directory
+ // argument when we get it.
+ if (argv[1]) {
+ if (nonroot)
+ bb_error_msg_and_die(bb_msg_you_must_be_root);
+ mtpair->mnt_fsname = argv[0];
+ mtpair->mnt_dir = argv[1];
+ mtpair->mnt_type = fstype;
+ mtpair->mnt_opts = cmdopts;
+ resolve_mount_spec(&mtpair->mnt_fsname);
+ rc = singlemount(mtpair, /*ignore_busy:*/ 0);
+ return rc;
+ }
+ storage_path = bb_simplify_path(argv[0]); // malloced
+ }
+
+ // Past this point, we are handling either "mount -a [opts]"
+ // or "mount [opts] single_param"
+
+ cmdopt_flags = parse_mount_options(cmdopts, NULL);
+ if (nonroot && (cmdopt_flags & ~MS_SILENT)) // Non-root users cannot specify flags
+ bb_error_msg_and_die(bb_msg_you_must_be_root);
+
+ // If we have a shared subtree flag, don't worry about fstab or mtab.
+ if (ENABLE_FEATURE_MOUNT_FLAGS
+ && (cmdopt_flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
+ ) {
+ // verbose_mount(source, target, type, flags, data)
+ rc = verbose_mount("", argv[0], "", cmdopt_flags, "");
+ if (rc)
+ bb_simple_perror_msg_and_die(argv[0]);
+ return rc;
+ }
+
+ // Open either fstab or mtab
+ fstabname = "/etc/fstab";
+ if (cmdopt_flags & MS_REMOUNT) {
+ // WARNING. I am not sure this matches util-linux's
+ // behavior. It's possible util-linux does not
+ // take -o opts from mtab (takes only mount source).
+ fstabname = bb_path_mtab_file;
+ }
+ fstab = setmntent(fstabname, "r");
+ if (!fstab)
+ bb_perror_msg_and_die("can't read '%s'", fstabname);
+
+ // Loop through entries until we find what we're looking for
+ memset(mtpair, 0, sizeof(mtpair));
+ for (;;) {
+ struct mntent *mtother = (mtcur==mtpair ? mtpair+1 : mtpair);
+
+ // Get next fstab entry
+ if (!getmntent_r(fstab, mtcur, getmntent_buf
+ + (mtcur==mtpair ? GETMNTENT_BUFSIZE/2 : 0),
+ GETMNTENT_BUFSIZE/2)
+ ) { // End of fstab/mtab is reached
+ mtcur = mtother; // the thing we found last time
+ break;
+ }
+
+ // If we're trying to mount something specific and this isn't it,
+ // skip it. Note we must match the exact text in fstab (ala
+ // "proc") or a full path from root
+ if (argv[0]) {
+
+ // Is this what we're looking for?
+ if (strcmp(argv[0], mtcur->mnt_fsname) != 0
+ && strcmp(storage_path, mtcur->mnt_fsname) != 0
+ && strcmp(argv[0], mtcur->mnt_dir) != 0
+ && strcmp(storage_path, mtcur->mnt_dir) != 0
+ ) {
+ continue; // no
+ }
+
+ // Remember this entry. Something later may have
+ // overmounted it, and we want the _last_ match.
+ mtcur = mtother;
+
+ // If we're mounting all
+ } else {
+ struct mntent *mp;
+ // No, mount -a won't mount anything,
+ // even user mounts, for mere humans
+ if (nonroot)
+ bb_error_msg_and_die(bb_msg_you_must_be_root);
+
+ // Does type match? (NULL matches always)
+ if (!match_fstype(mtcur, fstype))
+ continue;
+
+ // Skip noauto and swap anyway
+ if ((parse_mount_options(mtcur->mnt_opts, NULL) & (MOUNT_NOAUTO | MOUNT_SWAP))
+ // swap is bogus "fstype", parse_mount_options can't check fstypes
+ || strcasecmp(mtcur->mnt_type, "swap") == 0
+ ) {
+ continue;
+ }
+
+ // Does (at least one) option match?
+ // (NULL matches always)
+ if (!match_opt(mtcur->mnt_opts, O_optmatch))
+ continue;
+
+ resolve_mount_spec(&mtcur->mnt_fsname);
+
+ // NFS mounts want this to be xrealloc-able
+ mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
+
+ // If nothing is mounted on this directory...
+ // (otherwise repeated "mount -a" mounts everything again)
+ mp = find_mount_point(mtcur->mnt_dir, /*subdir_too:*/ 0);
+ // We do not check fsname match of found mount point -
+ // "/" may have fsname of "/dev/root" while fstab
+ // says "/dev/something_else".
+ if (mp) {
+ if (verbose) {
+ bb_error_msg("according to %s, "
+ "%s is already mounted on %s",
+ bb_path_mtab_file,
+ mp->mnt_fsname, mp->mnt_dir);
+ }
+ } else {
+ // ...mount this thing
+ if (singlemount(mtcur, /*ignore_busy:*/ 1)) {
+ // Count number of failed mounts
+ rc++;
+ }
+ }
+ free(mtcur->mnt_opts);
+ }
+ }
+
+ // End of fstab/mtab is reached.
+ // Were we looking for something specific?
+ if (argv[0]) { // yes
+ unsigned long l;
+
+ // If we didn't find anything, complain
+ if (!mtcur->mnt_fsname)
+ bb_error_msg_and_die("can't find %s in %s",
+ argv[0], fstabname);
+
+ // What happens when we try to "mount swap_partition"?
+ // (fstab containts "swap_partition swap swap defaults 0 0")
+ // util-linux-ng 2.13.1 does this:
+ // stat("/sbin/mount.swap", 0x7fff62a3a350) = -1 ENOENT (No such file or directory)
+ // mount("swap_partition", "swap", "swap", MS_MGC_VAL, NULL) = -1 ENOENT (No such file or directory)
+ // lstat("swap", 0x7fff62a3a640) = -1 ENOENT (No such file or directory)
+ // write(2, "mount: mount point swap does not exist\n", 39) = 39
+ // exit_group(32) = ?
+#if 0
+ // In case we want to simply skip swap partitions:
+ l = parse_mount_options(mtcur->mnt_opts, NULL);
+ if ((l & MOUNT_SWAP)
+ // swap is bogus "fstype", parse_mount_options can't check fstypes
+ || strcasecmp(mtcur->mnt_type, "swap") == 0
+ ) {
+ goto ret;
+ }
+#endif
+ if (nonroot) {
+ // fstab must have "users" or "user"
+ l = parse_mount_options(mtcur->mnt_opts, NULL);
+ if (!(l & MOUNT_USERS))
+ bb_error_msg_and_die(bb_msg_you_must_be_root);
+ }
+
+ //util-linux-2.12 does not do this check.
+ //// If nothing is mounted on this directory...
+ //// (otherwise repeated "mount FOO" mounts FOO again)
+ //mp = find_mount_point(mtcur->mnt_dir, /*subdir_too:*/ 0);
+ //if (mp) {
+ // bb_error_msg("according to %s, "
+ // "%s is already mounted on %s",
+ // bb_path_mtab_file,
+ // mp->mnt_fsname, mp->mnt_dir);
+ //} else {
+ // ...mount the last thing we found
+ mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
+ append_mount_options(&(mtcur->mnt_opts), cmdopts);
+ resolve_mount_spec(&mtpair->mnt_fsname);
+ rc = singlemount(mtcur, /*ignore_busy:*/ 0);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(mtcur->mnt_opts);
+ //}
+ }
+
+ //ret:
+ if (ENABLE_FEATURE_CLEAN_UP)
+ endmntent(fstab);
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(storage_path);
+ free(cmdopts);
+ }
+
+//TODO: exitcode should be ORed mask of (from "man mount"):
+// 0 success
+// 1 incorrect invocation or permissions
+// 2 system error (out of memory, cannot fork, no more loop devices)
+// 4 internal mount bug or missing nfs support in mount
+// 8 user interrupt
+//16 problems writing or locking /etc/mtab
+//32 mount failure
+//64 some mount succeeded
+ return rc;
+}