lvmetad: document and tidy cmdline args

Try to bring the lvmetad usage text and man page closer to the code.
There seem to be 3 useful ways to use -d with lvmetad at the moment:
  -d all
  -d wire
  -d debug
(They can also be comma-separated like -d wire,debug.)
Prior to the last release, -d, -dd and -ddd were supported.
Fail if an unrecognised debug arg is supplied on the command line.
Change -V to report the same version as the lvm binary: previously it
just reported version 0.

1 files changed, 4 insertions, 2 deletions

diff --git a/libdaemon/server/daemon-server.c b/libdaemon/server/daemon-server.c
index b02621f6f..3711419c6 100644
--- a/libdaemon/server/daemon-server.c
+++ b/libdaemon/server/daemon-server.c
@@ -506,7 +506,8 @@ void daemon_start(daemon_state s)
 		kill(getppid(), SIGTERM);
 
 	if (s.daemon_init)
-		s.daemon_init(&s);
+		if (!s.daemon_init(&s))
+			failed = 1;
 
 	while (!_shutdown_requested && !failed) {
 		fd_set in;
@@ -525,7 +526,8 @@ void daemon_start(daemon_state s)
 			perror("unlink error");
 
 	if (s.daemon_fini)
-		s.daemon_fini(&s);
+		if (!s.daemon_fini(&s))
+			failed = 1;
 
 	INFO(&s, "%s shutting down", s.name);