/* SPDX-License-Identifier: LGPL-2.1+ */
-/***
- 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 <errno.h>
#include <mntent.h>
#include "fstab-util.h"
#include "generator.h"
#include "log.h"
+#include "main-func.h"
#include "mkdir.h"
#include "mount-setup.h"
#include "mount-util.h"
+#include "mountpoint-util.h"
#include "parse-util.h"
#include "path-util.h"
#include "proc-cmdline.h"
GROWFS = 1 << 4,
} MountpointFlags;
-static const char *arg_dest = "/tmp";
-static const char *arg_dest_late = "/tmp";
+static const char *arg_dest = NULL;
+static const char *arg_dest_late = NULL;
static bool arg_fstab_enabled = true;
static char *arg_root_what = NULL;
static char *arg_root_fstype = NULL;
static char *arg_usr_options = NULL;
static VolatileMode arg_volatile_mode = _VOLATILE_MODE_INVALID;
+STATIC_DESTRUCTOR_REGISTER(arg_root_what, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_root_fstype, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_root_options, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_root_hash, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_usr_what, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_usr_fstype, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_usr_options, freep);
+
static int write_options(FILE *f, const char *options) {
_cleanup_free_ char *o = NULL;
struct mntent *me,
MountpointFlags flags) {
- _cleanup_free_ char *name = NULL, *unit = NULL;
+ _cleanup_free_ char *name = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
- unit = strjoin(arg_dest, "/", name);
- if (!unit)
- return log_oom();
-
- f = fopen(unit, "wxe");
- if (!f)
- return log_error_errno(errno,
- errno == EEXIST ?
- "Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?" :
- "Failed to create unit file %s: %m",
- unit);
-
- (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
+ r = generator_open_unit_file(arg_dest, "/etc/fstab", name, &f);
+ if (r < 0)
+ return r;
fputs("# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
r = fflush_and_check(f);
if (r < 0)
- return log_error_errno(r, "Failed to write unit file %s: %m", unit);
+ return log_error_errno(r, "Failed to write unit file %s: %m", name);
/* use what as where, to have a nicer error message */
r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL);
STRV_FOREACH(s, names) {
char *x;
- r = unit_name_mangle_with_suffix(*s, UNIT_NAME_NOGLOB, ".mount", &x);
+ r = unit_name_mangle_with_suffix(*s, 0, ".mount", &x);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
r = strv_consume(&units, x);
_cleanup_free_ char
*name = NULL,
- *automount_name = NULL, *automount_unit = NULL,
+ *automount_name = NULL,
*filtered = NULL,
*where_escaped = NULL;
- const char *unit;
_cleanup_fclose_ FILE *f = NULL;
int r;
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
- unit = strjoina(dest, "/", name);
-
- f = fopen(unit, "wxe");
- if (!f)
- return log_error_errno(errno,
- errno == EEXIST ?
- "Failed to create mount unit file %s, as it already exists. Duplicate entry in /etc/fstab?" :
- "Failed to create unit file %s: %m",
- unit);
-
- (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
+ r = generator_open_unit_file(dest, "/etc/fstab", name, &f);
+ if (r < 0)
+ return r;
fprintf(f,
- "# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=%s\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n",
r = fflush_and_check(f);
if (r < 0)
- return log_error_errno(r, "Failed to write unit file %s: %m", unit);
+ return log_error_errno(r, "Failed to write unit file %s: %m", name);
if (flags & MAKEFS) {
r = generator_hook_up_mkfs(dest, what, where, fstype);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
- automount_unit = strjoin(dest, "/", automount_name);
- if (!automount_unit)
- return log_oom();
-
fclose(f);
- f = fopen(automount_unit, "wxe");
- if (!f)
- return log_error_errno(errno, "Failed to create unit file %s: %m", automount_unit);
- (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
+ r = generator_open_unit_file(dest, "/etc/fstab", automount_name, &f);
+ if (r < 0)
+ return r;
fprintf(f,
- "# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=%s\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n",
r = fflush_and_check(f);
if (r < 0)
- return log_error_errno(r, "Failed to write unit file %s: %m", automount_unit);
+ return log_error_errno(r, "Failed to write unit file %s: %m", automount_name);
r = generator_add_symlink(dest, post,
(flags & NOFAIL) ? "wants" : "requires", automount_name);
int r = 0;
fstab_path = initrd ? "/sysroot/etc/fstab" : "/etc/fstab";
+ log_debug("Parsing %s...", fstab_path);
+
f = setmntent(fstab_path, "re");
if (!f) {
if (errno == ENOENT)
if (!what)
return log_oom();
- if (is_device_path(what) && path_is_read_only_fs("sys") > 0) {
+ if (is_device_path(what) && path_is_read_only_fs("/sys") > 0) {
log_info("Running in a container, ignoring fstab device entry for %s.", what);
continue;
}
return log_oom();
if (is_path(where)) {
- path_kill_slashes(where);
+ path_simplify(where, false);
+
/* Follow symlinks here; see 5261ba901845c084de5a8fd06500ed09bfb0bd80 which makes sense for
* mount units, but causes problems since it historically worked to have symlinks in e.g.
* /etc/fstab. So we canonicalize here. Note that we use CHASE_NONEXISTENT to handle the case
* where a symlink refers to another mount target; this works assuming the sub-mountpoint
- * target is the final directory.
- */
+ * target is the final directory. */
r = chase_symlinks(where, initrd ? "/sysroot" : NULL,
CHASE_PREFIX_ROOT | CHASE_NONEXISTENT,
&canonical_where);
- if (r < 0)
- /* In this case for now we continue on as if it wasn't a symlink */
- log_warning_errno(r, "Failed to read symlink target for %s: %m", where);
- else {
- if (streq(canonical_where, where))
- canonical_where = mfree(canonical_where);
- else
- log_debug("Canonicalized what=%s where=%s to %s",
- what, where, canonical_where);
- }
+ if (r < 0) /* If we can't canonicalize we continue on as if it wasn't a symlink */
+ log_debug_errno(r, "Failed to read symlink target for %s, ignoring: %m", where);
+ else if (streq(canonical_where, where)) /* If it was fully canonicalized, suppress the change */
+ canonical_where = mfree(canonical_where);
+ else
+ log_debug("Canonicalized what=%s where=%s to %s", what, where, canonical_where);
}
makefs = fstab_test_option(me->mnt_opts, "x-systemd.makefs\0");
growfs = fstab_test_option(me->mnt_opts, "x-systemd.growfs\0");
noauto = fstab_test_yes_no_option(me->mnt_opts, "noauto\0" "auto\0");
nofail = fstab_test_yes_no_option(me->mnt_opts, "nofail\0" "fail\0");
- log_debug("Found entry what=%s where=%s type=%s makefs=%s nofail=%s noauto=%s",
+
+ log_debug("Found entry what=%s where=%s type=%s makefs=%s growfs=%s noauto=%s nofail=%s",
what, where, me->mnt_type,
- yes_no(makefs),
+ yes_no(makefs), yes_no(growfs),
yes_no(noauto), yes_no(nofail));
if (streq(me->mnt_type, "swap"))
}
static int add_volatile_root(void) {
- const char *from, *to;
-
- if (arg_volatile_mode != VOLATILE_YES)
- return 0;
-
/* Let's add in systemd-remount-volatile.service which will remount the root device to tmpfs if this is
* requested, leaving only /usr from the root mount inside. */
- from = strjoina(SYSTEM_DATA_UNIT_PATH "/systemd-volatile-root.service");
- to = strjoina(arg_dest, "/" SPECIAL_INITRD_ROOT_FS_TARGET, ".requires/systemd-volatile-root.service");
-
- (void) mkdir_parents(to, 0755);
-
- if (symlink(from, to) < 0)
- return log_error_errno(errno, "Failed to hook in volatile remount service: %m");
+ if (arg_volatile_mode != VOLATILE_YES)
+ return 0;
- return 0;
+ return generator_add_symlink(arg_dest, SPECIAL_INITRD_ROOT_FS_TARGET, "requires",
+ SYSTEM_DATA_UNIT_PATH "/" SPECIAL_VOLATILE_ROOT_SERVICE);
}
static int add_volatile_var(void) {
return 1;
}
-int main(int argc, char *argv[]) {
- int r = 0;
+static int run(const char *dest, const char *dest_early, const char *dest_late) {
+ int r, r2 = 0, r3 = 0;
- if (argc > 1 && argc != 4) {
- log_error("This program takes three or no arguments.");
- return EXIT_FAILURE;
- }
-
- if (argc > 1)
- arg_dest = argv[1];
- if (argc > 3)
- arg_dest_late = argv[3];
-
- log_set_target(LOG_TARGET_SAFE);
- log_parse_environment();
- log_open();
-
- umask(0022);
+ assert_se(arg_dest = dest);
+ assert_se(arg_dest_late = dest_late);
r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0);
if (r < 0)
/* Always honour root= and usr= in the kernel command line if we are in an initrd */
if (in_initrd()) {
- int k;
-
r = add_sysroot_mount();
- k = add_sysroot_usr_mount();
- if (k < 0)
- r = k;
+ r2 = add_sysroot_usr_mount();
- k = add_volatile_root();
- if (k < 0)
- r = k;
+ r3 = add_volatile_root();
} else
r = add_volatile_var();
/* Honour /etc/fstab only when that's enabled */
if (arg_fstab_enabled) {
- int k;
-
- log_debug("Parsing /etc/fstab");
-
/* Parse the local /etc/fstab, possibly from the initrd */
- k = parse_fstab(false);
- if (k < 0)
- r = k;
+ r2 = parse_fstab(false);
/* If running in the initrd also parse the /etc/fstab from the host */
- if (in_initrd()) {
- log_debug("Parsing /sysroot/etc/fstab");
-
- k = parse_fstab(true);
- if (k < 0)
- r = k;
- }
+ if (in_initrd())
+ r3 = parse_fstab(true);
+ else
+ r3 = generator_enable_remount_fs_service(arg_dest);
}
- free(arg_root_what);
- free(arg_root_fstype);
- free(arg_root_options);
- free(arg_root_hash);
-
- free(arg_usr_what);
- free(arg_usr_fstype);
- free(arg_usr_options);
-
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+ return r < 0 ? r : r2 < 0 ? r2 : r3;
}
+
+DEFINE_MAIN_GENERATOR_FUNCTION(run);
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