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-rw-r--r--src/libshared/generator.c193
1 files changed, 193 insertions, 0 deletions
diff --git a/src/libshared/generator.c b/src/libshared/generator.c
new file mode 100644
index 0000000000..cd3c35cd55
--- /dev/null
+++ b/src/libshared/generator.c
@@ -0,0 +1,193 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2014 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 <unistd.h>
+
+#include "alloc-util.h"
+#include "dropin.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fstab-util.h"
+#include "generator.h"
+#include "log.h"
+#include "macro.h"
+#include "mkdir.h"
+#include "path-util.h"
+#include "special.h"
+#include "string-util.h"
+#include "time-util.h"
+#include "unit-name.h"
+#include "util.h"
+
+static int write_fsck_sysroot_service(const char *dir, const char *what) {
+ _cleanup_free_ char *device = NULL, *escaped = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ const char *unit;
+ int r;
+
+ escaped = cescape(what);
+ if (!escaped)
+ return log_oom();
+
+ unit = strjoina(dir, "/systemd-fsck-root.service");
+ log_debug("Creating %s", unit);
+
+ r = unit_name_from_path(what, ".device", &device);
+ if (r < 0)
+ return log_error_errno(r, "Failed to convert device \"%s\" to unit name: %m", what);
+
+ f = fopen(unit, "wxe");
+ if (!f)
+ return log_error_errno(errno, "Failed to create unit file %s: %m", unit);
+
+ fprintf(f,
+ "# Automatically generated by %1$s\n\n"
+ "[Unit]\n"
+ "Documentation=man:systemd-fsck-root.service(8)\n"
+ "Description=File System Check on %2$s\n"
+ "DefaultDependencies=no\n"
+ "BindsTo=%3$s\n"
+ "After=%3$s local-fs-pre.target\n"
+ "Before=shutdown.target\n"
+ "\n"
+ "[Service]\n"
+ "Type=oneshot\n"
+ "RemainAfterExit=yes\n"
+ "ExecStart=" SYSTEMD_FSCK_PATH " %4$s\n"
+ "TimeoutSec=0\n",
+ program_invocation_short_name,
+ what,
+ device,
+ escaped);
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ return log_error_errno(r, "Failed to write unit file %s: %m", unit);
+
+ return 0;
+}
+
+int generator_write_fsck_deps(
+ FILE *f,
+ const char *dir,
+ const char *what,
+ const char *where,
+ const char *fstype) {
+
+ int r;
+
+ assert(f);
+ assert(dir);
+ assert(what);
+ assert(where);
+
+ if (!is_device_path(what)) {
+ log_warning("Checking was requested for \"%s\", but it is not a device.", what);
+ return 0;
+ }
+
+ if (!isempty(fstype) && !streq(fstype, "auto")) {
+ r = fsck_exists(fstype);
+ if (r < 0)
+ log_warning_errno(r, "Checking was requested for %s, but couldn't detect if fsck.%s may be used, proceeding: %m", what, fstype);
+ else if (r == 0) {
+ /* treat missing check as essentially OK */
+ log_debug("Checking was requested for %s, but fsck.%s does not exist.", what, fstype);
+ return 0;
+ }
+ }
+
+ if (path_equal(where, "/")) {
+ const char *lnk;
+
+ lnk = strjoina(dir, "/" SPECIAL_LOCAL_FS_TARGET ".wants/systemd-fsck-root.service");
+
+ mkdir_parents(lnk, 0755);
+ if (symlink(SYSTEM_DATA_UNIT_PATH "/systemd-fsck-root.service", lnk) < 0)
+ return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
+
+ } else {
+ _cleanup_free_ char *_fsck = NULL;
+ const char *fsck;
+
+ if (in_initrd() && path_equal(where, "/sysroot")) {
+ r = write_fsck_sysroot_service(dir, what);
+ if (r < 0)
+ return r;
+
+ fsck = "systemd-fsck-root.service";
+ } else {
+ r = unit_name_from_path_instance("systemd-fsck", what, ".service", &_fsck);
+ if (r < 0)
+ return log_error_errno(r, "Failed to create fsck service name: %m");
+
+ fsck = _fsck;
+ }
+
+ fprintf(f,
+ "Requires=%1$s\n"
+ "After=%1$s\n",
+ fsck);
+ }
+
+ return 0;
+}
+
+int generator_write_timeouts(
+ const char *dir,
+ const char *what,
+ const char *where,
+ const char *opts,
+ char **filtered) {
+
+ /* Allow configuration how long we wait for a device that
+ * backs a mount point to show up. This is useful to support
+ * endless device timeouts for devices that show up only after
+ * user input, like crypto devices. */
+
+ _cleanup_free_ char *node = NULL, *unit = NULL, *timeout = NULL;
+ usec_t u;
+ int r;
+
+ r = fstab_filter_options(opts, "comment=systemd.device-timeout\0" "x-systemd.device-timeout\0",
+ NULL, &timeout, filtered);
+ if (r <= 0)
+ return r;
+
+ r = parse_sec(timeout, &u);
+ if (r < 0) {
+ log_warning("Failed to parse timeout for %s, ignoring: %s", where, timeout);
+ return 0;
+ }
+
+ node = fstab_node_to_udev_node(what);
+ if (!node)
+ return log_oom();
+
+ r = unit_name_from_path(node, ".device", &unit);
+ if (r < 0)
+ return log_error_errno(r, "Failed to make unit name from path: %m");
+
+ return write_drop_in_format(dir, unit, 50, "device-timeout",
+ "# Automatically generated by %s\n\n"
+ "[Unit]\nJobTimeoutSec=%s",
+ program_invocation_short_name, timeout);
+}