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-rw-r--r--src/fstab-generator/fstab-generator.c517
1 files changed, 517 insertions, 0 deletions
diff --git a/src/fstab-generator/fstab-generator.c b/src/fstab-generator/fstab-generator.c
new file mode 100644
index 0000000000..39af18a9c8
--- /dev/null
+++ b/src/fstab-generator/fstab-generator.c
@@ -0,0 +1,517 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2012 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdio.h>
+#include <mntent.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "log.h"
+#include "util.h"
+#include "unit-name.h"
+#include "path-util.h"
+#include "mount-setup.h"
+#include "special.h"
+#include "mkdir.h"
+
+static const char *arg_dest = "/tmp";
+
+static int device_name(const char *path, char **unit) {
+ char *p;
+
+ assert(path);
+
+ if (!is_device_path(path))
+ return 0;
+
+ p = unit_name_from_path(path, ".device");
+ if (!p)
+ return -ENOMEM;
+
+ *unit = p;
+ return 1;
+}
+
+static int mount_find_pri(struct mntent *me, int *ret) {
+ char *end, *pri;
+ unsigned long r;
+
+ assert(me);
+ assert(ret);
+
+ pri = hasmntopt(me, "pri");
+ if (!pri)
+ return 0;
+
+ pri += 4;
+
+ errno = 0;
+ r = strtoul(pri, &end, 10);
+ if (errno != 0)
+ return -errno;
+
+ if (end == pri || (*end != ',' && *end != 0))
+ return -EINVAL;
+
+ *ret = (int) r;
+ return 1;
+}
+
+static int add_swap(const char *what, struct mntent *me) {
+ char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL;
+ FILE *f = NULL;
+ bool noauto, nofail;
+ int r, pri = -1;
+
+ assert(what);
+ assert(me);
+
+ r = mount_find_pri(me, &pri);
+ if (r < 0) {
+ log_error("Failed to parse priority");
+ return pri;
+ }
+
+ noauto = !!hasmntopt(me, "noauto");
+ nofail = !!hasmntopt(me, "nofail");
+
+ name = unit_name_from_path(what, ".swap");
+ if (!name) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ unit = join(arg_dest, "/", name, NULL);
+ if (!unit) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ f = fopen(unit, "wxe");
+ if (!f) {
+ r = -errno;
+ log_error("Failed to create unit file: %m");
+ goto finish;
+ }
+
+ fputs("# Automatically generated by systemd-fstab-generator\n\n"
+ "[Unit]\n"
+ "DefaultDependencies=no\n"
+ "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
+ "Before=" SPECIAL_UMOUNT_TARGET "\n", f);
+
+ if (!noauto && !nofail)
+ fputs("Before=" SPECIAL_SWAP_TARGET "\n", f);
+
+ fprintf(f,
+ "\n"
+ "[Swap]\n"
+ "What=%s\n",
+ what);
+
+ if (pri >= 0)
+ fprintf(f,
+ "Priority=%i\n",
+ pri);
+
+ fflush(f);
+ if (ferror(f)) {
+ log_error("Failed to write unit file: %m");
+ r = -errno;
+ goto finish;
+ }
+
+ if (!noauto) {
+ lnk = join(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL);
+ if (!lnk) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ mkdir_parents(lnk, 0755);
+ if (symlink(unit, lnk) < 0) {
+ log_error("Failed to create symlink: %m");
+ r = -errno;
+ goto finish;
+ }
+
+ r = device_name(what, &device);
+ if (r < 0) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (r > 0) {
+ free(lnk);
+ lnk = join(arg_dest, "/", device, ".wants/", name, NULL);
+ if (!lnk) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ mkdir_parents(lnk, 0755);
+ if (symlink(unit, lnk) < 0) {
+ log_error("Failed to create symlink: %m");
+ r = -errno;
+ goto finish;
+ }
+ }
+ }
+
+ r = 0;
+finish:
+ if (f)
+ fclose(f);
+
+ free(unit);
+ free(lnk);
+ free(name);
+ free(device);
+
+ return r;
+}
+
+static bool mount_is_bind(struct mntent *me) {
+ assert(me);
+
+ return
+ hasmntopt(me, "bind") ||
+ streq(me->mnt_opts, "bind");
+}
+
+static bool mount_is_network(struct mntent *me) {
+ assert(me);
+
+ return
+ hasmntopt(me, "_netdev") ||
+ fstype_is_network(me->mnt_type);
+}
+
+static int add_mount(const char *what, const char *where, struct mntent *me) {
+ char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL, *automount_name = NULL, *automount_unit = NULL;
+ FILE *f = NULL;
+ bool noauto, nofail, automount, isbind, isnetwork;
+ int r;
+ const char *post, *pre;
+
+ assert(what);
+ assert(where);
+ assert(me);
+
+ if (streq(me->mnt_type, "autofs"))
+ return 0;
+
+ if (!is_path(where)) {
+ log_warning("Mount point %s is not a valid path, ignoring.", where);
+ return 0;
+ }
+
+ if (mount_point_is_api(where) ||
+ mount_point_ignore(where))
+ return 0;
+
+ isnetwork = mount_is_network(me);
+ isbind = mount_is_bind(me);
+
+ noauto = !!hasmntopt(me, "noauto");
+ nofail = !!hasmntopt(me, "nofail");
+ automount =
+ hasmntopt(me, "comment=systemd.automount") ||
+ hasmntopt(me, "x-systemd.automount");
+
+ if (isnetwork) {
+ post = SPECIAL_REMOTE_FS_TARGET;
+ pre = SPECIAL_REMOTE_FS_PRE_TARGET;
+ } else {
+ post = SPECIAL_LOCAL_FS_TARGET;
+ pre = SPECIAL_LOCAL_FS_PRE_TARGET;
+ }
+
+ name = unit_name_from_path(where, ".mount");
+ if (!name) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ unit = join(arg_dest, "/", name, NULL);
+ if (!unit) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ f = fopen(unit, "wxe");
+ if (!f) {
+ r = -errno;
+ log_error("Failed to create unit file: %m");
+ goto finish;
+ }
+
+ fputs("# Automatically generated by systemd-fstab-generator\n\n"
+ "[Unit]\n"
+ "DefaultDependencies=no\n", f);
+
+ if (!path_equal(where, "/"))
+ fprintf(f,
+ "After=%s\n"
+ "Wants=%s\n"
+ "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
+ "Before=" SPECIAL_UMOUNT_TARGET "\n",
+ pre,
+ pre);
+
+
+ if (!noauto && !nofail && !automount)
+ fprintf(f,
+ "Before=%s\n",
+ post);
+
+ fprintf(f,
+ "\n"
+ "[Mount]\n"
+ "What=%s\n"
+ "Where=%s\n"
+ "Type=%s\n"
+ "FsckPassNo=%i\n",
+ what,
+ where,
+ me->mnt_type,
+ me->mnt_passno);
+
+ if (!isempty(me->mnt_opts) &&
+ !streq(me->mnt_opts, "defaults"))
+ fprintf(f,
+ "Options=%s\n",
+ me->mnt_opts);
+
+ fflush(f);
+ if (ferror(f)) {
+ log_error("Failed to write unit file: %m");
+ r = -errno;
+ goto finish;
+ }
+
+ if (!noauto) {
+ lnk = join(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL);
+ if (!lnk) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ mkdir_parents(lnk, 0755);
+ if (symlink(unit, lnk) < 0) {
+ log_error("Failed to create symlink: %m");
+ r = -errno;
+ goto finish;
+ }
+
+ if (!isbind &&
+ !path_equal(where, "/")) {
+
+ r = device_name(what, &device);
+ if (r < 0) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (r > 0) {
+ free(lnk);
+ lnk = join(arg_dest, "/", device, ".wants/", name, NULL);
+ if (!lnk) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ mkdir_parents(lnk, 0755);
+ if (symlink(unit, lnk) < 0) {
+ log_error("Failed to creat symlink: %m");
+ r = -errno;
+ goto finish;
+ }
+ }
+ }
+ }
+
+ if (automount && !path_equal(where, "/")) {
+ automount_name = unit_name_from_path(where, ".automount");
+ if (!name) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ automount_unit = join(arg_dest, "/", automount_name, NULL);
+ if (!automount_unit) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ fclose(f);
+ f = fopen(automount_unit, "wxe");
+ if (!f) {
+ r = -errno;
+ log_error("Failed to create unit file: %m");
+ goto finish;
+ }
+
+ fprintf(f,
+ "# Automatically generated by systemd-fstab-generator\n\n"
+ "[Unit]\n"
+ "DefaultDependencies=no\n"
+ "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
+ "Before=" SPECIAL_UMOUNT_TARGET " %s\n"
+ "\n"
+ "[Automount]\n"
+ "Where=%s\n",
+ post,
+ where);
+
+ fflush(f);
+ if (ferror(f)) {
+ log_error("Failed to write unit file: %m");
+ r = -errno;
+ goto finish;
+ }
+
+ free(lnk);
+ lnk = join(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", automount_name, NULL);
+ if (!lnk) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ mkdir_parents(lnk, 0755);
+ if (symlink(automount_unit, lnk) < 0) {
+ log_error("Failed to create symlink: %m");
+ r = -errno;
+ goto finish;
+ }
+ }
+
+ r = 0;
+finish:
+ if (f)
+ fclose(f);
+
+ free(unit);
+ free(lnk);
+ free(name);
+ free(device);
+ free(automount_name);
+ free(automount_unit);
+
+ return r;
+}
+
+static int parse_fstab(void) {
+ FILE *f;
+ int r = 0;
+ struct mntent *me;
+
+ errno = 0;
+ f = setmntent("/etc/fstab", "r");
+ if (!f) {
+ if (errno == ENOENT)
+ return 0;
+
+ log_error("Failed to open /etc/fstab: %m");
+ return -errno;
+ }
+
+ while ((me = getmntent(f))) {
+ char *where, *what;
+ int k;
+
+ what = fstab_node_to_udev_node(me->mnt_fsname);
+ if (!what) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ where = strdup(me->mnt_dir);
+ if (!where) {
+ log_error("Out of memory");
+ free(what);
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (is_path(what))
+ path_kill_slashes(what);
+
+ if (is_path(where))
+ path_kill_slashes(where);
+
+ log_debug("Found entry what=%s where=%s type=%s", what, where, me->mnt_type);
+
+ if (streq(me->mnt_type, "swap"))
+ k = add_swap(what, me);
+ else
+ k = add_mount(what, where, me);
+
+ free(what);
+ free(where);
+
+ if (k < 0)
+ r = k;
+ }
+
+finish:
+ endmntent(f);
+ return r;
+}
+
+int main(int argc, char *argv[]) {
+ int r;
+
+ if (argc > 2) {
+ log_error("This program takes one or no arguments.");
+ return EXIT_FAILURE;
+ }
+
+ if (argc > 1)
+ arg_dest = argv[1];
+
+ log_set_target(LOG_TARGET_AUTO);
+ log_parse_environment();
+ log_open();
+
+ log_set_max_level(LOG_DEBUG);
+
+ umask(0022);
+
+ r = parse_fstab();
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 14:21:38 +0100