systemctl: split up humungous systemctl.c file

This is just some refactoring: shifting around of code, not change in
codeflow.

This splits up the way too huge systemctl.c in multiple more easily
digestable files. It roughly follows the rule that each family of verbs
gets its own .c/.h file pair, and so do all the compat executable names
we support. Plus three extra files for sysv compat (which existed before
already, but I renamed slightly, to get the systemctl- prefix lik
everything else), a -util file with generic stuff everything uses, and a
-logind file with everything that talks directly to logind instead of
PID1.

systemctl is still a bit too complex for my taste, but I think this way
itc omes in a more digestable bits at least.

No change of behaviour, just reshuffling of some code.

1 files changed, 35 insertions, 0 deletions

diff --git a/src/systemctl/systemctl-sysv-compat.h b/src/systemctl/systemctl-sysv-compat.h
new file mode 100644
index 0000000000..9a3b84deda
--- /dev/null
+++ b/src/systemctl/systemctl-sysv-compat.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+#include "time-util.h"
+
+int talk_initctl(char runlevel);
+
+int parse_shutdown_time_spec(const char *t, usec_t *ret);
+
+/* The init script exit codes for the LSB 'status' verb. (This is different from the 'start' verb, whose exit
+   codes are defined in exit-status.h.)
+
+   0       program is running or service is OK
+   1       program is dead and /var/run pid file exists
+   2       program is dead and /var/lock lock file exists
+   3       program is not running
+   4       program or service status is unknown
+   5-99    reserved for future LSB use
+   100-149 reserved for distribution use
+   150-199 reserved for application use
+   200-254 reserved
+
+   https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html
+*/
+enum {
+        EXIT_PROGRAM_RUNNING_OR_SERVICE_OK        = 0,
+        EXIT_PROGRAM_DEAD_AND_PID_EXISTS          = 1,
+        EXIT_PROGRAM_DEAD_AND_LOCK_FILE_EXISTS    = 2,
+        EXIT_PROGRAM_NOT_RUNNING                  = 3,
+        EXIT_PROGRAM_OR_SERVICES_STATUS_UNKNOWN   = 4,
+};
+
+int enable_sysv_units(const char *verb, char **args);
+
+int action_to_runlevel(void) _pure_;