Add service configuration reloading

This commit add the ability to initd to reload the service configuration
while running. The new configuration is merged with the existing one as
follows:

For each target:
 - If the existing service list is not NULL, we have not started that
   target yet. Simply replace it with the new list.
 - If it is NULL, the services have already been started.
    - First, remove all entries for services in that target that no
      loner exist (except from the 'running' list).
    - Second, add new services that we don't have yet. Treat them as
      recently diseased and let the user start them manualy.

Signed-off-by: David Oberhollenzer <goliath@infraroot.at>

2 files changed, 6 insertions, 0 deletions

diff --git a/cmd/service/disable.c b/cmd/service/disable.c
index 6210a8c..ffaab0a 100644
--- a/cmd/service/disable.c
+++ b/cmd/service/disable.c
@@ -4,6 +4,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <string.h>
+#include <signal.h>
 #include <stdio.h>
 #include <errno.h>
 
@@ -55,6 +56,8 @@ static int cmd_disable(int argc, char **argv)
 		goto out;
 	}
 
+	kill(1, SIGHUP);
+
 	ret = EXIT_SUCCESS;
 out:
 	free(linkname);
diff --git a/cmd/service/enable.c b/cmd/service/enable.c
index 67cf0aa..8734aec 100644
--- a/cmd/service/enable.c
+++ b/cmd/service/enable.c
@@ -4,6 +4,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <string.h>
+#include <signal.h>
 #include <stdio.h>
 #include <errno.h>
 
@@ -60,6 +61,8 @@ static int cmd_enable(int argc, char **argv)
 		goto out;
 	}
 
+	kill(1, SIGHUP);
+
 	ret = EXIT_SUCCESS;
 out:
 	free(linkname);