start-stop-daemon: Fix -x is not required for -K

Commit 088fec36fedff2cd50437c95b7fb430abf8d303c made -x required for
all. However it isn't for -K.

function                                             old     new   delta
start_stop_daemon_main                              1084    1105     +21
packed_usage                                       33343   33326     -17
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 21/-17)              Total: 4 bytes

Signed-off-by: Alexander Vickberg <wickbergster@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 20 insertions, 15 deletions

diff --git a/debianutils/start_stop_daemon.c b/debianutils/start_stop_daemon.c
index 3a4c1044a..72642ae74 100644
--- a/debianutils/start_stop_daemon.c
+++ b/debianutils/start_stop_daemon.c
@@ -94,7 +94,7 @@ Misc options:
 //usage:     "\n	-n NAME		Match processes with NAME"
 //usage:     "\n			in comm field in /proc/PID/stat"
 //usage:     "\n	-x EXECUTABLE	Match processes with this command"
-//usage:     "\n			command in /proc/PID/cmdline"
+//usage:     "\n			in /proc/PID/cmdline"
 //usage:     "\n	-p FILE		Match a process with PID from FILE"
 //usage:     "\n	All specified conditions must match"
 //usage:     "\n-S only:"
@@ -452,31 +452,34 @@ int start_stop_daemon_main(int argc UNUSED_PARAM, char **argv)
 // "start-stop-daemon -S -a sleep      -- 5"
 // NB: -n option does _not_ behave in this way: this will try to execute "5":
 // "start-stop-daemon -S -n sleep      -- 5"
-	if (!execname) { /* -x is not given */
-		execname = startas;
-		if (!execname) { /* neither -x nor -a is given */
-			execname = argv[0];
-			if (!execname)
-				bb_show_usage();
-			argv++;
+	if (opt & CTX_START) {
+		if (!execname) { /* -x is not given */
+			execname = startas;
+			if (!execname) { /* neither -x nor -a is given */
+				execname = argv[0];
+				if (!execname)
+					bb_show_usage();
+				argv++;
+			}
 		}
+		if (!startas) /* -a is not given: use -x EXECUTABLE or argv[0] */
+			startas = execname;
+		*--argv = startas;
+	}
+	if (execname) {
+		G.execname_sizeof = strlen(execname) + 1;
+		G.execname_cmpbuf = xmalloc(G.execname_sizeof + 1);
 	}
-	if (!startas) /* -a is not given: use -x EXECUTABLE or argv[0] */
-		startas = execname;
-	*--argv = startas;
-	G.execname_sizeof = strlen(execname) + 1;
-	G.execname_cmpbuf = xmalloc(G.execname_sizeof + 1);
-
 //	IF_FEATURE_START_STOP_DAEMON_FANCY(
 //		if (retry_arg)
 //			retries = xatoi_positive(retry_arg);
 //	)
-
 	if (userspec) {
 		user_id = bb_strtou(userspec, NULL, 10);
 		if (errno)
 			user_id = xuname2uid(userspec);
 	}
+
 	/* Both start and stop need to know current processes */
 	do_procinit();
 
@@ -485,6 +488,8 @@ int start_stop_daemon_main(int argc UNUSED_PARAM, char **argv)
 		return (opt & OPT_OKNODO) ? 0 : (i <= 0);
 	}
 
+	/* else: CTX_START (-S). execname can't be NULL. */
+
 	if (G.found_procs) {
 		if (!QUIET)
 			printf("%s is already running\n", execname);