/** * mnt_update_force_rdonly: * @upd: update * @rdonly: is read-only? * * Returns: 0 on success and negative number in case of error. */ int mnt_update_force_rdonly(struct libmnt_update *upd, int rdonly) { int rc = 0; if (!upd || !upd->fs) return -EINVAL; if (rdonly && (upd->mountflags & MS_RDONLY)) return 0; if (!rdonly && !(upd->mountflags & MS_RDONLY)) return 0; if (!upd->userspace_only) { /* /etc/mtab -- we care about VFS options there */ const char *o = mnt_fs_get_options(upd->fs); char *n = o ? strdup(o) : NULL; if (n) mnt_optstr_remove_option(&n, rdonly ? "rw" : "ro"); if (!mnt_optstr_prepend_option(&n, rdonly ? "ro" : "rw", NULL)) rc = mnt_fs_set_options(upd->fs, n); free(n); } if (rdonly) upd->mountflags &= ~MS_RDONLY; else upd->mountflags |= MS_RDONLY; return rc; }
/** * mnt_context_next_umount: * @cxt: context * @itr: iterator * @fs: returns the current filesystem * @mntrc: returns the return code from mnt_context_umount() * @ignored: returns 1 for not matching * * This function tries to umount the next filesystem from mtab (as returned by * mnt_context_get_mtab()). * * You can filter out filesystems by: * mnt_context_set_options_pattern() to simulate umount -a -O pattern * mnt_context_set_fstype_pattern() to simulate umount -a -t pattern * * If the filesystem is not mounted or does not match the defined criteria, * then the function mnt_context_next_umount() returns zero, but the @ignored is * non-zero. Note that the root filesystem is always ignored. * * If umount(2) syscall or umount.type helper failed, then the * mnt_context_next_umount() function returns zero, but the @mntrc is non-zero. * Use also mnt_context_get_status() to check if the filesystem was * successfully umounted. * * Returns: 0 on success, * <0 in case of error (!= umount(2) errors) * 1 at the end of the list. */ int mnt_context_next_umount(struct libmnt_context *cxt, struct libmnt_iter *itr, struct libmnt_fs **fs, int *mntrc, int *ignored) { struct libmnt_table *mtab; const char *tgt; int rc; if (ignored) *ignored = 0; if (mntrc) *mntrc = 0; if (!cxt || !fs || !itr) return -EINVAL; rc = mnt_context_get_mtab(cxt, &mtab); cxt->mtab = NULL; /* do not reset mtab */ mnt_reset_context(cxt); cxt->mtab = mtab; if (rc) return rc; do { rc = mnt_table_next_fs(mtab, itr, fs); if (rc != 0) return rc; /* no more filesystems (or error) */ tgt = mnt_fs_get_target(*fs); } while (!tgt); DBG(CXT, ul_debugobj(cxt, "next-umount: trying %s [fstype: %s, t-pattern: %s, options: %s, O-pattern: %s]", tgt, mnt_fs_get_fstype(*fs), cxt->fstype_pattern, mnt_fs_get_options(*fs), cxt->optstr_pattern)); /* ignore filesystems which don't match options patterns */ if ((cxt->fstype_pattern && !mnt_fs_match_fstype(*fs, cxt->fstype_pattern)) || /* ignore filesystems which don't match type patterns */ (cxt->optstr_pattern && !mnt_fs_match_options(*fs, cxt->optstr_pattern))) { if (ignored) *ignored = 1; DBG(CXT, ul_debugobj(cxt, "next-umount: not-match")); return 0; } rc = mnt_context_set_fs(cxt, *fs); if (rc) return rc; rc = mnt_context_umount(cxt); if (mntrc) *mntrc = rc; return 0; }
static int update_modify_options(struct libmnt_update *upd, struct libmnt_lock *lc) { struct libmnt_table *tb = NULL; int rc = 0; struct libmnt_fs *fs; assert(upd); assert(upd->fs); DBG(UPDATE, mnt_debug_h(upd, "%s: modify options", upd->filename)); fs = upd->fs; if (lc) rc = mnt_lock_file(lc); if (rc) return rc; tb = __mnt_new_table_from_file(upd->filename, upd->userspace_only ? MNT_FMT_UTAB : MNT_FMT_MTAB); if (tb) { struct libmnt_fs *cur = mnt_table_find_target(tb, mnt_fs_get_target(fs), MNT_ITER_BACKWARD); if (cur) { if (upd->userspace_only) rc = mnt_fs_set_attributes(cur, mnt_fs_get_attributes(fs)); if (!rc) rc = mnt_fs_set_options(cur, mnt_fs_get_options(fs)); if (!rc) rc = update_table(upd, tb); } } if (lc) mnt_unlock_file(lc); mnt_free_table(tb); return rc; }
/* mtab and fstab update -- returns zero on success */ static int fprintf_mtab_fs(FILE *f, struct libmnt_fs *fs) { const char *o, *src, *fstype; char *m1, *m2, *m3, *m4; int rc; assert(fs); assert(f); src = mnt_fs_get_source(fs); fstype = mnt_fs_get_fstype(fs); o = mnt_fs_get_options(fs); m1 = src ? mangle(src) : "none"; m2 = mangle(mnt_fs_get_target(fs)); m3 = fstype ? mangle(fstype) : "none"; m4 = o ? mangle(o) : "rw"; if (m1 && m2 && m3 && m4) { rc = fprintf(f, "%s %s %s %s %d %d\n", m1, m2, m3, m4, mnt_fs_get_freq(fs), mnt_fs_get_passno(fs)); if (rc > 0) rc = 0; } else rc = -ENOMEM; if (src) free(m1); free(m2); if (fstype) free(m3); if (o) free(m4); return rc; }
/** * mnt_context_next_mount: * @cxt: context * @itr: iterator * @fs: returns the current filesystem * @mntrc: returns the return code from mnt_context_mount() * @ignored: returns 1 for not matching and 2 for already mounted filesystems * * This function tries to mount the next filesystem from fstab (as returned by * mnt_context_get_fstab()). See also mnt_context_set_fstab(). * * You can filter out filesystems by: * mnt_context_set_options_pattern() to simulate mount -a -O pattern * mnt_context_set_fstype_pattern() to simulate mount -a -t pattern * * If the filesystem is already mounted or does not match defined criteria, * then the mnt_context_next_mount() function returns zero, but the @ignored is * non-zero. Note that the root filesystem and filesystems with "noauto" option * are always ignored. * * If mount(2) syscall or mount.type helper failed, then the * mnt_context_next_mount() function returns zero, but the @mntrc is non-zero. * Use also mnt_context_get_status() to check if the filesystem was * successfully mounted. * * Returns: 0 on success, * <0 in case of error (!= mount(2) errors) * 1 at the end of the list. */ int mnt_context_next_mount(struct libmnt_context *cxt, struct libmnt_iter *itr, struct libmnt_fs **fs, int *mntrc, int *ignored) { struct libmnt_table *fstab, *mtab; const char *o, *tgt; int rc, mounted = 0; if (ignored) *ignored = 0; if (mntrc) *mntrc = 0; if (!cxt || !fs || !itr) return -EINVAL; mtab = cxt->mtab; cxt->mtab = NULL; /* do not reset mtab */ mnt_reset_context(cxt); cxt->mtab = mtab; rc = mnt_context_get_fstab(cxt, &fstab); if (rc) return rc; rc = mnt_table_next_fs(fstab, itr, fs); if (rc != 0) return rc; /* more filesystems (or error) */ o = mnt_fs_get_user_options(*fs); tgt = mnt_fs_get_target(*fs); DBG(CXT, mnt_debug_h(cxt, "next-mount: trying %s", tgt)); /* ignore swap */ if (mnt_fs_is_swaparea(*fs) || /* ignore root filesystem */ (tgt && (strcmp(tgt, "/") == 0 || strcmp(tgt, "root") == 0)) || /* ignore noauto filesystems */ (o && mnt_optstr_get_option(o, "noauto", NULL, NULL) == 0) || /* ignore filesystems not match with options patterns */ (cxt->fstype_pattern && !mnt_fs_match_fstype(*fs, cxt->fstype_pattern)) || /* ignore filesystems not match with type patterns */ (cxt->optstr_pattern && !mnt_fs_match_options(*fs, cxt->optstr_pattern))) { if (ignored) *ignored = 1; DBG(CXT, mnt_debug_h(cxt, "next-mount: not-match " "[fstype: %s, t-pattern: %s, options: %s, O-pattern: %s]", mnt_fs_get_fstype(*fs), cxt->fstype_pattern, mnt_fs_get_options(*fs), cxt->optstr_pattern)); return 0; } /* ignore already mounted filesystems */ rc = mnt_context_is_fs_mounted(cxt, *fs, &mounted); if (rc) return rc; if (mounted) { if (ignored) *ignored = 2; return 0; } if (mnt_context_is_fork(cxt)) { rc = mnt_fork_context(cxt); if (rc) return rc; /* fork error */ if (mnt_context_is_parent(cxt)) { return 0; /* parent */ } } /* child or non-forked */ rc = mnt_context_set_fs(cxt, *fs); if (!rc) { rc = mnt_context_mount(cxt); if (mntrc) *mntrc = rc; } if (mnt_context_is_child(cxt)) { DBG(CXT, mnt_debug_h(cxt, "next-mount: child exit [rc=%d]", rc)); DBG_FLUSH; exit(rc); } return 0; }