return set_flag(cxt, MNT_FL_LAZY, enable);
}
+/**
+ * mnt_context_enable_rdonly_umount:
+ * @cxt: mount context
+ * @enable: TRUE or FALSE
+ *
+ * Enable/disable read-only remount on failed umount(2)
+ * (see umount(8) man page, option -r).
+ *
+ * Returns: 0 on success, negative number in case of error.
+ */
+int mnt_context_enable_rdonly_umount(mnt_context *cxt, int enable)
+{
+ return set_flag(cxt, MNT_FL_RDONLY_UMOUNT, enable);
+}
+
/**
* mnt_context_disable_helpers:
* @cxt: mount context
int rc;
cxt->mtab = mnt_new_tab();
- if (!cxt->fstab)
+ if (!cxt->mtab)
return -ENOMEM;
rc = mnt_tab_parse_mtab(cxt->mtab);
if (rc)
int mnt_context_prepare_update(mnt_context *cxt, int act)
{
int rc;
+ const char *tgt = cxt->fs ? mnt_fs_get_target(cxt->fs) : NULL;
+
+ if (act == MNT_ACT_UMOUNT && tgt && !strcmp(tgt, "/"))
+ /* Don't try to touch mtab if umounting root FS */
+ cxt->flags |= MNT_FL_NOMTAB;
if ((cxt->flags & MNT_FL_NOMTAB) || cxt->helper)
return 0;
DBG(CXT, mnt_debug_h(cxt, "failed to found entry in fstab/mtab"));
return rc;
}
+
+
+#ifdef TEST_PROGRAM
+
+mnt_lock *lock;
+
+static void lock_fallback(void)
+{
+ if (lock) {
+ mnt_unlock_file(lock);
+ mnt_free_lock(lock);
+ }
+}
+
+int test_mount(struct mtest *ts, int argc, char *argv[])
+{
+ int idx = 1, rc = 0;
+ mnt_context *cxt;
+
+ if (argc < 2)
+ return -EINVAL;
+
+ cxt = mnt_new_context();
+ if (!cxt)
+ return -ENOMEM;
+
+ if (!strcmp(argv[idx], "-o")) {
+ mnt_context_set_optstr(cxt, argv[idx + 1]);
+ idx += 2;
+ }
+ if (!strcmp(argv[idx], "-t")) {
+ /* TODO: use mnt_context_set_fstype_pattern() */
+ mnt_context_set_fstype(cxt, argv[idx + 1]);
+ idx += 2;
+ }
+
+ if (argc == idx + 1)
+ /* mount <mountpont>|<device> */
+ mnt_context_set_target(cxt, argv[idx++]);
+
+ else if (argc == idx + 2) {
+ /* mount <device> <mountpoint> */
+ mnt_context_set_source(cxt, argv[idx++]);
+ mnt_context_set_target(cxt, argv[idx++]);
+ }
+
+ rc = mnt_context_prepare_mount(cxt);
+ if (rc)
+ printf("failed to prepare mount\n");
+ else {
+ lock = mnt_context_get_lock(cxt);
+ if (lock)
+ atexit(lock_fallback);
+
+ rc = mnt_context_do_mount(cxt);
+ if (rc)
+ printf("failed to mount\n");
+ else {
+ printf("successfully mounted");
+ rc = mnt_context_post_mount(cxt);
+ if (rc)
+ printf("mtab update failed\n");
+ }
+ }
+
+ mnt_free_context(cxt);
+ return rc;
+}
+
+int test_umount(struct mtest *ts, int argc, char *argv[])
+{
+ int idx = 1, rc = 0;
+ mnt_context *cxt;
+
+ if (argc < 2)
+ return -EINVAL;
+
+ cxt = mnt_new_context();
+ if (!cxt)
+ return -ENOMEM;
+
+ if (!strcmp(argv[idx], "-t")) {
+ mnt_context_set_fstype(cxt, argv[idx + 1]);
+ idx += 2;
+ }
+
+ if (!strcmp(argv[idx], "-f")) {
+ mnt_context_enable_force(cxt, TRUE);
+ idx++;
+ }
+
+ if (!strcmp(argv[idx], "-l")) {
+ mnt_context_enable_lazy(cxt, TRUE);
+ idx++;
+ }
+
+ if (!strcmp(argv[idx], "-r")) {
+ mnt_context_enable_rdonly_umount(cxt, TRUE);
+ idx++;
+ }
+
+ if (argc == idx + 1) {
+ /* mount <mountpont>|<device> */
+ mnt_context_set_target(cxt, argv[idx++]);
+ } else {
+ rc = -EINVAL;
+ goto err;
+ }
+
+ rc = mnt_context_prepare_umount(cxt);
+ if (rc)
+ printf("failed to prepare umount\n");
+ else {
+ lock = mnt_context_get_lock(cxt);
+ if (lock)
+ atexit(lock_fallback);
+
+ rc = mnt_context_do_umount(cxt);
+ if (rc)
+ printf("failed to umount\n");
+ else {
+ printf("successfully umounted");
+ rc = mnt_context_post_umount(cxt);
+ if (rc)
+ printf("mtab update failed\n");
+ }
+ }
+err:
+ mnt_free_context(cxt);
+ return rc;
+}
+
+int main(int argc, char *argv[])
+{
+ struct mtest tss[] = {
+ { "--mount", test_mount, "[-o <opts>] [-t <type>] <spec>|<src> <target>" },
+ { "--umount", test_umount, "[-t <type>] [-f][-l][-r] <src>|<target>" },
+ { NULL }};
+
+ return mnt_run_test(tss, argc, argv);
+}
+
+#endif /* TEST_PROGRAM */
rc = generate_helper_optstr(cxt, &o);
if (rc)
- goto done;
+ return -EINVAL;
DBG_FLUSH;
break;
}
-done:
- free(o);
return rc;
}
if (!(flags & MS_MGC_MSK))
flags |= MS_MGC_VAL;
- DBG(CXT, mnt_debug_h(cxt, "calling mount(2) "
+ DBG(CXT, mnt_debug_h(cxt, "%smount(2) "
"[source=%s, target=%s, type=%s, "
" mountflags=%08lx, mountdata=%s]",
+ (cxt->flags & MNT_FL_FAKE) ? "(FAKE) " : "",
src, target, type,
flags, cxt->mountdata ? "yes" : "<none>"));
- if (mount(src, target, type, flags, cxt->mountdata)) {
- cxt->syscall_errno = errno;
- DBG(CXT, mnt_debug_h(cxt, "mount(2) failed [errno=%d]",
- cxt->syscall_errno));
- return -cxt->syscall_errno;
+ if (!(cxt->flags & MNT_FL_FAKE)) {
+ if (mount(src, target, type, flags, cxt->mountdata)) {
+ cxt->syscall_errno = errno;
+ DBG(CXT, mnt_debug_h(cxt, "mount(2) failed [errno=%d]",
+ cxt->syscall_errno));
+ return -cxt->syscall_errno;
+ }
+ DBG(CXT, mnt_debug_h(cxt, "mount(2) success"));
}
-
- DBG(CXT, mnt_debug_h(cxt, "mount(2) success"));
return 0;
}
return 0;
}
-#ifdef TEST_PROGRAM
-
-mnt_lock *lock;
-
-static void lock_fallback(void)
-{
- if (lock) {
- mnt_unlock_file(lock);
- mnt_free_lock(lock);
- }
-}
-
-int test_mount(struct mtest *ts, int argc, char *argv[])
-{
- int idx = 1, rc = 0;
- mnt_context *cxt;
-
- if (argc < 2)
- return -EINVAL;
-
- cxt = mnt_new_context();
- if (!cxt)
- return -ENOMEM;
-
- if (!strcmp(argv[idx], "-o")) {
- mnt_context_set_optstr(cxt, argv[idx + 1]);
- idx += 2;
- }
- if (!strcmp(argv[idx], "-t")) {
- /* TODO: use mnt_context_set_fstype_pattern() */
- mnt_context_set_fstype(cxt, argv[idx + 1]);
- idx += 2;
- }
-
- if (argc == idx + 1)
- /* mount <mountpont>|<device> */
- mnt_context_set_target(cxt, argv[idx++]);
-
- else if (argc == idx + 2) {
- /* mount <device> <mountpoint> */
- mnt_context_set_source(cxt, argv[idx++]);
- mnt_context_set_target(cxt, argv[idx++]);
- }
-
- rc = mnt_context_prepare_mount(cxt);
- if (rc)
- printf("failed to prepare mount\n");
- else {
- lock = mnt_context_get_lock(cxt);
- if (lock)
- atexit(lock_fallback);
-
- rc = mnt_context_do_mount(cxt);
- if (rc)
- printf("failed to mount\n");
- else {
- printf("successfully mounted");
- rc = mnt_context_post_mount(cxt);
- if (rc)
- printf("mtab update failed\n");
- }
- }
-
- mnt_free_context(cxt);
- return rc;
-}
-
-int main(int argc, char *argv[])
-{
- struct mtest tss[] = {
- { "--mount", test_mount, "[-o <opts>] [-t <type>] <spec> | <src> <target>" },
- { NULL }
- };
-
- return mnt_run_test(tss, argc, argv);
-}
-
-#endif /* TEST_PROGRAM */
--- /dev/null
+/*
+ * Copyright (C) 2010 Karel Zak <kzak@redhat.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include <sys/wait.h>
+#include <sys/mount.h>
+
+#include "c.h"
+#include "pathnames.h"
+#include "strutils.h"
+#include "mountP.h"
+
+static int lookup_umount_fs(mnt_context *cxt)
+{
+ int rc;
+ const char *tgt;
+ mnt_tab *mtab;
+ mnt_fs *fs;
+
+ tgt = mnt_fs_get_target(cxt->fs);
+ if (!tgt) {
+ DBG(CXT, mnt_debug_h(cxt, "umount: undefined target"));
+ return -EINVAL;
+ }
+ rc = mnt_context_get_mtab(cxt, &mtab);
+ if (rc) {
+ DBG(CXT, mnt_debug_h(cxt, "umount: failed to read mtab"));
+ return rc;
+ }
+ fs = mnt_tab_find_target(mtab, tgt, MNT_ITER_BACKWARD);
+ if (!fs) {
+ /* maybe the option is source rather than target (mountpoint) */
+ fs = mnt_tab_find_source(mtab, tgt, MNT_ITER_BACKWARD);
+
+ if (fs) {
+ mnt_fs *fs1 = mnt_tab_find_target(mtab,
+ mnt_fs_get_target(fs),
+ MNT_ITER_BACKWARD);
+ if (!fs1) {
+ DBG(CXT, mnt_debug_h(cxt, "mtab is broken?!?!"));
+ return -EINVAL;
+ }
+ if (fs != fs1) {
+ /* Something was stacked over `file' on the
+ * same mount point. */
+ DBG(CXT, mnt_debug_h(cxt,
+ "umount: %s: %s is mounted "
+ "over it on the same point",
+ tgt, mnt_fs_get_source(fs1)));
+ return -EINVAL;
+ }
+ }
+ }
+
+ if (!fs) {
+ DBG(CXT, mnt_debug_h(cxt, "cannot found %s in mtab", tgt));
+ return 0;
+ }
+
+ /* copy from mtab/fstab to our FS description
+ */
+ rc = mnt_fs_set_source(cxt->fs, mnt_fs_get_source(fs));
+ if (!rc)
+ rc = mnt_fs_set_target(cxt->fs, mnt_fs_get_target(fs));
+
+ if (!rc && !mnt_fs_get_fstype(cxt->fs))
+ rc = mnt_fs_set_fstype(cxt->fs, mnt_fs_get_fstype(fs));
+ if (!rc)
+ rc = mnt_fs_set_optstr(cxt->fs, mnt_fs_get_optstr(fs));
+
+ cxt->flags |= MNT_FL_TAB_APPLIED;
+ return rc;
+}
+
+/* check if @devname is loopdev and if the device is associated
+ * with a source from @fstab_fs
+ *
+ * TODO : move this to loopdev.c
+ */
+static int mnt_loopdev_associated_fs(const char *devname, mnt_fs *fs)
+{
+ uintmax_t offset = 0;
+ const char *src;
+ char *val, *optstr;
+ size_t valsz;
+
+ /* check if it begins with /dev/loop */
+ if (strncmp(devname, _PATH_DEV_LOOP, sizeof(_PATH_DEV_LOOP)))
+ return 0;
+
+ src = mnt_fs_get_srcpath(fs);
+ if (!src)
+ return 0;
+
+ /* check for offset option in @fs */
+ optstr = (char *) mnt_fs_get_optstr(fs);
+ if (optstr && !mnt_optstr_get_option(optstr, "offset=", &val, &valsz)) {
+ int rc;
+
+ val = strndup(val, valsz);
+ if (!val)
+ return 0;
+ rc = strtosize(val, &offset);
+ free(val);
+ if (rc)
+ return 0;
+ }
+
+ /* TODO:
+ * if (mnt_loopdev_associated_file(devname, src, offset))
+ * return 1;
+ */
+ return 0;
+}
+
+/*
+ * Note that cxt->fs contains relevant mtab entry!
+ */
+static int evaluate_permissions(mnt_context *cxt)
+{
+ mnt_tab *fstab;
+ unsigned long u_flags;
+ const char *tgt, *src, *optstr;
+ int rc, ok = 0;
+ mnt_fs *fs;
+
+ if (!cxt || !cxt->fs)
+ return -EINVAL;
+
+ if (!mnt_context_is_restricted(cxt))
+ return 0; /* superuser mount */
+
+ if (!(cxt->flags & MNT_FL_TAB_APPLIED)) {
+ DBG(CXT, mnt_debug_h(cxt,
+ "cannot found %s in mtab and you are not root",
+ mnt_fs_get_target(cxt->fs)));
+ goto eperm;
+ }
+
+ mnt_context_get_userspace_mountflags(cxt, &u_flags);
+
+ if (!(cxt->flags & MNT_FL_NOHELPERS) && (u_flags & MNT_MS_UHELPER)) {
+ char *suffix = NULL;
+ char *o = (char *) mnt_fs_get_optstr(cxt->fs);
+ size_t valsz;
+
+ rc = mnt_optstr_get_option(o, "uhelper", &suffix, &valsz);
+ if (!rc) {
+ suffix = strndup(suffix, valsz);
+ if (!suffix)
+ return -ENOMEM;
+ rc = mnt_context_prepare_helper(cxt, "umount", suffix);
+ }
+ if (rc < 0)
+ return rc;
+ if (cxt->helper)
+ return 0; /* we'll call /sbin/umount.<uhelper> */
+ }
+
+ /*
+ * User mounts has to be in /etc/fstab
+ */
+ rc = mnt_context_get_fstab(cxt, &fstab);
+ if (rc)
+ return rc;
+
+ tgt = mnt_fs_get_target(cxt->fs);
+ src = mnt_fs_get_source(cxt->fs);
+
+ /* 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 = mnt_tab_find_pair(fstab, src, tgt, MNT_ITER_FORWARD);
+ if (!fs) {
+ /*
+ * It's possible that there is /path/file.img in fstab and
+ * /dev/loop0 in mtab -- then we have to check releation
+ * between loopdev and the file.
+ */
+ fs = mnt_tab_find_target(fstab, tgt, MNT_ITER_FORWARD);
+ if (fs) {
+ const char *dev = mnt_fs_get_srcpath(cxt->fs); /* devname from mtab */
+
+ if (!dev || !mnt_loopdev_associated_fs(dev, fs))
+ fs = NULL;
+ }
+ if (!fs) {
+ DBG(CXT, mnt_debug_h(cxt,
+ "umount %s: mtab disagrees with fstab",
+ tgt));
+ goto eperm;
+ }
+ }
+
+ /*
+ * 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).
+ */
+ optstr = mnt_fs_get_optstr(fs);
+ if (!optstr)
+ goto eperm;
+
+ if (mnt_optstr_get_userspace_mountflags(optstr, &u_flags))
+ goto eperm;
+
+ if (u_flags & MNT_MS_USERS)
+ /* promiscuous setting in fstab */
+ return 0;
+ /*
+ * Check user=<username> setting from mtab if there is user, owner or
+ * group option in /etc/fstab
+ */
+ if ((u_flags & MNT_MS_USER) || (u_flags & MNT_MS_OWNER) ||
+ (u_flags & MNT_MS_GROUP)) {
+
+ char *curr_user = mnt_get_username(getuid());
+ char *mtab_user = NULL;
+ size_t sz;
+
+ if (!curr_user) {
+ DBG(CXT, mnt_debug_h(cxt, "umount %s: cannot "
+ "convert %d to username",
+ tgt, getuid()));
+ goto eperm;
+ }
+
+ /* get options from mtab */
+ optstr = mnt_fs_get_optstr(cxt->fs);
+ if (optstr && !mnt_optstr_get_option((char *) optstr,
+ "user", &mtab_user, &sz) && sz)
+ ok = !strncmp(curr_user, mtab_user, sz);
+ }
+
+ if (ok) {
+ DBG(CXT, mnt_debug_h(cxt, "umount %s is allowed", tgt));
+ return 0;
+ }
+eperm:
+ DBG(CXT, mnt_debug_h(cxt, "umount %s is not allowed for you", tgt));
+ return -EPERM;
+}
+
+static int exec_helper(mnt_context *cxt)
+{
+ int rc;
+
+ assert(cxt);
+ assert(cxt->fs);
+ assert(cxt->helper);
+
+ DBG_FLUSH;
+
+ switch (fork()) {
+ case 0:
+ {
+ const char *args[10], *type;
+ int i = 0;
+
+ if (setgid(getgid()) < 0)
+ exit(EXIT_FAILURE);
+
+ if (setuid(getuid()) < 0)
+ exit(EXIT_FAILURE);
+
+ type = mnt_fs_get_fstype(cxt->fs);
+
+ args[i++] = cxt->helper; /* 1 */
+ args[i++] = mnt_fs_get_target(cxt->fs); /* 2 */
+
+ if (cxt->flags & MNT_FL_NOMTAB)
+ args[i++] = "-n"; /* 3 */
+ if (cxt->flags & MNT_FL_LAZY)
+ args[i++] = "-l"; /* 4 */
+ if (cxt->flags & MNT_FL_FORCE)
+ args[i++] = "-f"; /* 5 */
+ if (cxt->flags & MNT_FL_VERBOSE)
+ args[i++] = "-v"; /* 6 */
+ if (cxt->flags & MNT_FL_RDONLY_UMOUNT)
+ args[i++] = "-r"; /* 7 */
+ if (type && !endswith(cxt->helper, type)) {
+ args[i++] = "-t"; /* 8 */
+ args[i++] = (char *) type; /* 9 */
+ }
+
+ args[i] = NULL; /* 10 */
+#ifdef CONFIG_LIBMOUNT_DEBUG
+ i = 0;
+ for (i = 0; args[i]; i++)
+ DBG(CXT, mnt_debug_h(cxt, "argv[%d] = \"%s\"",
+ i, args[i]));
+#endif
+ DBG_FLUSH;
+ execv(cxt->helper, (char * const *) args);
+ exit(EXIT_FAILURE);
+ }
+ default:
+ {
+ int st;
+ wait(&st);
+ cxt->helper_status = WIFEXITED(st) ? WEXITSTATUS(st) : -1;
+
+ DBG(CXT, mnt_debug_h(cxt, "%s executed [status=%d]",
+ cxt->helper, cxt->helper_status));
+ rc = 0;
+ break;
+ }
+
+ case -1:
+ rc = -errno;
+ DBG(CXT, mnt_debug_h(cxt, "fork() failed"));
+ break;
+ }
+
+ return rc;
+}
+
+static int do_umount(mnt_context *cxt)
+{
+ int rc = 0;
+ const char *src, *target;
+
+ assert(cxt);
+ assert(cxt->fs);
+
+ if (cxt->helper)
+ return exec_helper(cxt);
+
+ src = mnt_fs_get_srcpath(cxt->fs);
+ target = mnt_fs_get_target(cxt->fs);
+
+ if (!target)
+ return -EINVAL;
+
+ if (cxt->flags & MNT_FL_FAKE)
+ return 0;
+
+ if (cxt->flags & MNT_FL_LAZY)
+ rc = umount2(target, MNT_DETACH);
+
+ else if (cxt->flags & MNT_FL_FORCE) {
+ rc = umount2(target, MNT_FORCE);
+
+ if (rc < 0 && errno == ENOSYS)
+ rc = umount(target);
+ } else
+ rc = umount(target);
+
+ if (rc < 0)
+ cxt->syscall_errno = errno;
+
+ /*
+ * try remount read-only
+ */
+ if (rc < 0 && cxt->syscall_errno == EBUSY &&
+ (cxt->flags & MNT_FL_RDONLY_UMOUNT) && src) {
+
+ cxt->mountflags |= MS_REMOUNT | MS_RDONLY;
+ cxt->flags &= ~MNT_FL_LOOPDEL;
+ DBG(CXT, mnt_debug_h(cxt, "umount(2) failed [errno=%d] -- "
+ "tring remount read-only",
+ cxt->syscall_errno));
+
+ rc = mount(src, target, NULL,
+ MS_MGC_VAL | MS_REMOUNT | MS_RDONLY, NULL);
+ if (rc < 0) {
+ cxt->syscall_errno = errno;
+ DBG(CXT, mnt_debug_h(cxt, "read-only re-mount(2) failed "
+ "[errno=%d]",
+ cxt->syscall_errno));
+ return -cxt->syscall_errno;
+ }
+ cxt->syscall_errno = 0;
+ DBG(CXT, mnt_debug_h(cxt, "read-only re-mount(2) success"));
+ return 0;
+ }
+
+ if (rc < 0) {
+ DBG(CXT, mnt_debug_h(cxt, "umount(2) failed [errno=%d]",
+ cxt->syscall_errno));
+ return -cxt->syscall_errno;
+ }
+ DBG(CXT, mnt_debug_h(cxt, "umount(2) success"));
+ return 0;
+}
+
+/**
+ * mnt_context_prepare_umount:
+ * @cxt: mount context
+ *
+ * This function:
+ * - read information from fstab/mtab (if necessary)
+ * - check premissions
+ * - prepare for mtab update (if necessary)
+ *
+ * It's strongly recommended to use this function before mnt_context_do_umount().
+ *
+ * Returns: 0 on success, and negative number in case of error.
+ */
+int mnt_context_prepare_umount(mnt_context *cxt)
+{
+ int rc = 0;
+
+ if (!cxt)
+ return -EINVAL;
+
+ if (!cxt->fs || (!mnt_fs_get_source(cxt->fs) &&
+ !mnt_fs_get_target(cxt->fs)))
+ return -EINVAL;
+
+ free(cxt->helper); /* be paranoid */
+ cxt->helper = NULL;
+
+ rc = lookup_umount_fs(cxt);
+ if (!rc)
+ rc = evaluate_permissions(cxt);
+ if (!rc && !cxt->helper)
+ rc = mnt_context_prepare_helper(cxt, "umount", NULL);
+/* TODO
+ if ((cxt->flags & MNT_FL_LOOPDEL) &&
+ (!mnt_is_loopdev(src) || mnt_loopdev_is_autoclear(src)))
+ cxt->flags &= ~MNT_FL_LOOPDEL;
+*/
+ if (!rc)
+ rc = mnt_context_prepare_update(cxt, MNT_ACT_UMOUNT);
+ if (!rc) {
+ DBG(CXT, mnt_debug_h(cxt, "umount sucessfully prepared"));
+ return 0;
+ }
+
+ DBG(CXT, mnt_debug_h(cxt, "umount prepare failed"));
+ return rc;
+}
+
+/**
+ * mnt_context_do_umount:
+ * @cxt: mount context
+ *
+ * Umount filesystem by umount(2) or fork()+exec(/sbin/umount.<type>).
+ *
+ * See also mnt_context_disable_helpers().
+ *
+ * Returns: 0 on success, and negative number in case of error.
+ */
+int mnt_context_do_umount(mnt_context *cxt)
+{
+ if (!cxt || !cxt->fs || (cxt->fs->flags & MNT_FS_SWAP))
+ return -EINVAL;
+
+ return do_umount(cxt);
+}
+
+/**
+ * mnt_context_post_umount:
+ * @cxt: mount context
+ *
+ * Updates mtab and detroy loopdev etc. This function should be always called after
+ * mnt_context_do_umount().
+ *
+ * Returns: 0 on success, and negative number in case of error.
+ */
+int mnt_context_post_umount(mnt_context *cxt)
+{
+ int rc = 0;
+
+ if (!cxt)
+ return -EINVAL;
+ if (cxt->syscall_errno || cxt->helper)
+ return 0;
+/* TODO
+ if (cxt->flags & MNT_FL_LOOPDEL)
+ rc = mnt_loopdev_clean(mnt_fs_get_source(cxt->fs));
+*/
+ if (cxt->flags & MNT_FL_NOMTAB)
+ return rc;
+
+ if ((cxt->flags & MNT_FL_RDONLY_UMOUNT) &&
+ (cxt->mountflags & (MS_RDONLY | MS_REMOUNT))) {
+ /*
+ * refresh update to handle remount to read-only
+ */
+ rc = mnt_context_prepare_update(cxt, MNT_ACT_MOUNT);
+ if (rc)
+ return rc;
+ }
+
+ /*
+ * Update /etc/mtab or /var/run/mount/mountinfo
+ */
+ if (cxt->update && !mnt_update_is_pointless(cxt->update)) {
+ rc = mnt_update_file(cxt->update);
+ if (!rc)
+ return rc;
+ }
+ return rc;
+}
+
+/**
+ * mnt_context_umount_strerror
+ * @cxt: mount context
+ * @buf: buffer
+ * @bufsiz: size of the buffer
+ *
+ * Returns: 0 or negative number in case of error.
+ */
+int mnt_context_umount_strerror(mnt_context *cxt, char *buf, size_t bufsiz)
+{
+ /* TODO: based on cxt->syscall_errno or cxt->helper_status */
+ return 0;
+}
projects / util-linux / commitdiff