Add 'ctld -t', to test configuration file validity.

Reviewed by:	mav, allanjude, bcr (man pages)
MFC after:	2 weeks
Sponsored by:	Klara Inc.
Differential Revision:	https://reviews.freebsd.org/D23792

2 files changed, 17 insertions, 2 deletions

diff --git a/usr.sbin/ctld/ctld.8 b/usr.sbin/ctld/ctld.8
index e63a6cd2dfef..ad510b28d575 100644
--- a/usr.sbin/ctld/ctld.8
+++ b/usr.sbin/ctld/ctld.8
@@ -27,7 +27,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd March 23, 2018
+.Dd March 31, 2020
 .Dt CTLD 8
 .Os
 .Sh NAME
@@ -38,6 +38,10 @@
 .Op Fl d
 .Op Fl f Ar config-file
 .Op Fl u
+.Nm
+.Fl t
+.Op Fl f Ar config-file
+.Op Fl u
 .Sh DESCRIPTION
 The
 .Nm
@@ -90,6 +94,8 @@ The daemon sends verbose debug output to standard error, and does not
 put itself in the background.
 The daemon will also not fork and will exit after processing one connection.
 This option is only intended for debugging the target.
+.It Fl t
+Test the configuration file for validity and exit.
 .It Fl u
 Use UCL configuration file format instead of the traditional non-UCL format.
 .El
diff --git a/usr.sbin/ctld/ctld.c b/usr.sbin/ctld/ctld.c
index c1dbac6f7956..dc7a789fcb19 100644
--- a/usr.sbin/ctld/ctld.c
+++ b/usr.sbin/ctld/ctld.c
@@ -69,6 +69,7 @@ usage(void)
 {
 
 	fprintf(stderr, "usage: ctld [-d][-u][-f config-file]\n");
+	fprintf(stderr, "       ctld -t [-u][-f config-file]\n");
 	exit(1);
 }
 
@@ -2663,14 +2664,18 @@ main(int argc, char **argv)
 	const char *config_path = DEFAULT_CONFIG_PATH;
 	int debug = 0, ch, error;
 	bool dont_daemonize = false;
+	bool test_config = false;
 	bool use_ucl = false;
 
-	while ((ch = getopt(argc, argv, "duf:R")) != -1) {
+	while ((ch = getopt(argc, argv, "dtuf:R")) != -1) {
 		switch (ch) {
 		case 'd':
 			dont_daemonize = true;
 			debug++;
 			break;
+		case 't':
+			test_config = true;
+			break;
 		case 'u':
 			use_ucl = true;
 			break;
@@ -2701,6 +2706,10 @@ main(int argc, char **argv)
 
 	if (newconf == NULL)
 		log_errx(1, "configuration error; exiting");
+
+	if (test_config)
+		return (0);
+
 	if (debug > 0) {
 		oldconf->conf_debug = debug;
 		newconf->conf_debug = debug;