Monitor: Add mode to generate confdb onlysecsrv

With this mode we can add socket activated services and have systemd
pre exec sssd to genrate the configuration file w/o starting the whole
sssd if not necessary.

Resolves:
https://fedorahosted.org/sssd/ticket/XXXX

2 files changed, 22 insertions, 3 deletions

diff --git a/src/monitor/monitor.c b/src/monitor/monitor.c
index 6a0707f0..db793613 100644
--- a/src/monitor/monitor.c
+++ b/src/monitor/monitor.c
@@ -2809,6 +2809,7 @@ int main(int argc, const char *argv[])
     poptContext pc;
     int opt_daemon = 0;
     int opt_interactive = 0;
+    int opt_genconf = 0;
     int opt_version = 0;
     char *opt_config_file = NULL;
     char *config_file = NULL;
@@ -2828,8 +2829,11 @@ int main(int argc, const char *argv[])
          _("Run interactive (not a daemon)"), NULL}, \
         {"config", 'c', POPT_ARG_STRING, &opt_config_file, 0, \
          _("Specify a non-default config file"), NULL}, \
-         {"version", '\0', POPT_ARG_NONE, &opt_version, 0, \
-          _("Print version number and exit"), NULL }, \
+        {"genconf", 'g', POPT_ARG_NONE, &opt_genconf, 0, \
+         _("Refresh the configuration database, then exit"), \
+         NULL}, \
+        {"version", '\0', POPT_ARG_NONE, &opt_version, 0, \
+         _("Print version number and exit"), NULL }, \
         POPT_TABLEEND
     };
 
@@ -2867,7 +2871,13 @@ int main(int argc, const char *argv[])
         return 1;
     }
 
-    if (!opt_daemon && !opt_interactive) {
+    if (opt_genconf && (opt_daemon || opt_interactive)) {
+        fprintf(stderr, "Option -g is incompatible with -D or -i\n");
+        poptPrintUsage(pc, stderr, 0);
+        return 1;
+    }
+
+    if (!opt_daemon && !opt_interactive && !opt_genconf) {
         opt_daemon = 1;
     }
 
@@ -2891,6 +2901,10 @@ int main(int argc, const char *argv[])
         flags |= FLAGS_INTERACTIVE;
         debug_to_stderr = 1;
     }
+    if (opt_genconf) {
+        flags |= FLAGS_GEN_CONF;
+        debug_to_stderr = 1;
+    }
 
     if (opt_config_file) {
         config_file = talloc_strdup(tmp_ctx, opt_config_file);
@@ -2996,6 +3010,10 @@ int main(int argc, const char *argv[])
         return 4;
     }
 
+    /* at this point we are done generating the config file, we may exit
+     * if that's all we were asked to do */
+    if (opt_genconf) return 0;
+
     /* set up things like debug , signals, daemonization, etc... */
     monitor->conf_path = CONFDB_MONITOR_CONF_ENTRY;
     ret = close(STDIN_FILENO);
diff --git a/src/util/util.h b/src/util/util.h
index dd394514..f37047a9 100644
--- a/src/util/util.h
+++ b/src/util/util.h
@@ -83,6 +83,7 @@
 #define FLAGS_DAEMON 0x0001
 #define FLAGS_INTERACTIVE 0x0002
 #define FLAGS_PID_FILE 0x0004
+#define FLAGS_GEN_CONF 0x0008
 
 #ifndef talloc_zfree
 #define talloc_zfree(ptr) do { talloc_free(discard_const(ptr)); ptr = NULL; } while(0)