autofs-5.0.3 - add command line option to override is running check

From: Ian Kent <raven@themaw.net>

autofs common usage is to have a single instance of the daemon running
and it checks for this and exits if another instance is found to be
running. But there are situations were people need to run multiple
instances and this patch adds a command line option to overrid the
check. Please note that this doesn't mean that autofs will function
properly and it is the users responsibility to check that the
configuration in use will function properly.
---

 daemon/automount.c |   14 +++++++++++---
 man/automount.8    |   10 ++++++++++
 2 files changed, 21 insertions(+), 3 deletions(-)


--- autofs-5.0.2.orig/daemon/automount.c
+++ autofs-5.0.2/daemon/automount.c
@@ -1694,6 +1694,8 @@ static void usage(void)
 		"			specify global mount options\n"
 		"	-l --set-log-priority priority path [path,...]\n"
 		"			set daemon log verbosity\n"
+		"	-C --dont-check-daemon\n"
+		"			don't check if daemon is already running\n"
 		"	-V --version	print version, build config and exit\n"
 		, program);
 }
@@ -1814,7 +1816,7 @@ int main(int argc, char *argv[])
 {
 	int res, opt, status;
 	int logpri = -1;
-	unsigned ghost, logging;
+	unsigned ghost, logging, daemon_check;
 	unsigned foreground, have_global_options;
 	time_t timeout;
 	time_t age = time(NULL);
@@ -1833,6 +1835,7 @@ int main(int argc, char *argv[])
 		{"global-options", 1, 0, 'O'},
 		{"version", 0, 0, 'V'},
 		{"set-log-priority", 1, 0, 'l'},
+		{"dont-check-daemon", 0, 0, 'C'},
 		{0, 0, 0, 0}
 	};
 
@@ -1851,9 +1854,10 @@ int main(int argc, char *argv[])
 	global_options = NULL;
 	have_global_options = 0;
 	foreground = 0;
+	daemon_check = 1;
 
 	opterr = 0;
-	while ((opt = getopt_long(argc, argv, "+hp:t:vdD:fVrO:l:n:", long_options, NULL)) != EOF) {
+	while ((opt = getopt_long(argc, argv, "+hp:t:vdD:fVrO:l:n:C", long_options, NULL)) != EOF) {
 		switch (opt) {
 		case 'h':
 			usage();
@@ -1922,6 +1926,10 @@ int main(int argc, char *argv[])
 			}
 			break;
 
+		case 'C':
+			daemon_check = 0;
+			break;
+
 		case '?':
 		case ':':
 			printf("%s: Ambiguous or unknown options\n", program);
@@ -1965,7 +1973,7 @@ int main(int argc, char *argv[])
 		exit(exit_code);
 	}
 
-	if (is_automount_running() > 0) {
+	if (daemon_check && is_automount_running() > 0) {
 		fprintf(stderr, "%s: program is already running.\n",
 			program);
 		exit(1);
--- autofs-5.0.2.orig/man/automount.8
+++ autofs-5.0.2/man/automount.8
@@ -81,6 +81,9 @@ be disabled, returning the daemon to ver
 .P
 The \fIpath\fP argument corresponds to the automounted
 path name as specified in the master map.
+.TP
+.I "\-C, \-\-dont-check-daemon"
+Don't check if the daemon is currently running (see NOTES).
 .SH ARGUMENTS
 \fBautomount\fP takes one optional argument, the name of the master map to
 use.
@@ -122,6 +125,13 @@ until they are no longer in use by the p
 If automount managed filesystems are found mounted when autofs is
 started they will be recoverd unless they are no longer present in
 the map in which case they need to umounted manually.
+.P
+If the option to disable the check to see if the daemon is already
+running is used be aware that autofs currently may not function correctly
+for certain types of automount maps. The mounts of the seperate daemons
+might interfere with one another. The implications of running multiple
+daemon instances needs to be checked and tested before we can say this
+is supported.
 .SH "SEE ALSO"
 .BR autofs (5),
 .BR autofs (8),