[cgmanager-devel] [PATCH 3/3] Add --sigstop support

[Stéphane Graber]

This is used to indicate that the service is ready so that upstart and
possibly some other systems can then have depending services start.

--daemon does something similar, however calling it prevents log message
from being logged.

Signed-off-by: Stéphane Graber <stgraber at ubuntu.com>
---
 cgmanager-proxy.c | 5 +++++
 cgmanager.c       | 5 +++++
 frontend.c        | 1 +
 frontend.h        | 1 +
 4 files changed, 12 insertions(+)

diff --git a/cgmanager-proxy.c b/cgmanager-proxy.c
index 075c13f..35d797d 100644
--- a/cgmanager-proxy.c
+++ b/cgmanager-proxy.c
@@ -948,6 +948,8 @@ out:
 static NihOption options[] = {
 	{ 0, "daemon", N_("Detach and run in the background"),
 	  NULL, NULL, &daemonise, NULL },
+	{ 0, "sigstop", N_("Raise SIGSTOP when ready"),
+		NULL, NULL, &sigstop, NULL },
 	{ 0, "check-master", N_("Check whether cgmanager is running"),
 	  NULL, NULL, &checkmaster, NULL },
 
@@ -1030,6 +1032,9 @@ main (int argc, char *argv[])
 		exit(1);
 	}
 
+	if (sigstop)
+		raise(SIGSTOP);
+
 	ret = nih_main_loop ();
 
 	/* Destroy any PID file we may have created */
diff --git a/cgmanager.c b/cgmanager.c
index b3567ff..bb1ba5c 100644
--- a/cgmanager.c
+++ b/cgmanager.c
@@ -739,6 +739,8 @@ static NihOption options[] = {
 		NULL, "subsystems to mount", NULL, my_setter },
 	{ 0, "daemon", N_("Detach and run in the background"),
 		NULL, NULL, &daemonise, NULL },
+	{ 0, "sigstop", N_("Raise SIGSTOP when ready"),
+		NULL, NULL, &sigstop, NULL },
 
 	NIH_OPTION_LAST
 };
@@ -884,6 +886,9 @@ main (int argc, char *argv[])
 		}
 	}
 
+	if (sigstop)
+		raise(SIGSTOP);
+
 	ret = nih_main_loop ();
 
 	/* Destroy any PID file we may have created */
diff --git a/frontend.c b/frontend.c
index c575d5f..036594c 100644
--- a/frontend.c
+++ b/frontend.c
@@ -24,6 +24,7 @@
 #include <frontend.h>
 
 int daemonise = FALSE;
+int sigstop = FALSE;
 bool setns_pid_supported = false;
 unsigned long mypidns;
 bool setns_user_supported = false;
diff --git a/frontend.h b/frontend.h
index c8ce4ae..144fd07 100644
--- a/frontend.h
+++ b/frontend.h
@@ -69,6 +69,7 @@
  **/
 #ifndef __frontend_c
 extern int daemonise;
+extern int sigstop;
 extern bool setns_pid_supported;
 extern unsigned long mypidns;
 extern bool setns_user_supported;
-- 
1.9.1