[PATCH 2/5] utils: add noreturn attribute and remove dead code

[Rosen Penev <rosenp@xxxxxxxxx>]

Found with -Wmissing-noreturn and -Wunreachable-code-return

Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>
---
 utils/v4l2-compliance/v4l2-compliance.cpp | 10 +++++-----
 utils/v4l2-dbg/v4l2-dbg.cpp               |  5 ++---
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/utils/v4l2-compliance/v4l2-compliance.cpp b/utils/v4l2-compliance/v4l2-compliance.cpp
index b3a18492..a312f54d 100644
--- a/utils/v4l2-compliance/v4l2-compliance.cpp
+++ b/utils/v4l2-compliance/v4l2-compliance.cpp
@@ -247,7 +247,6 @@ static void usage()
 	printf("  -w, --wrapper      Use the libv4l2 wrapper library.\n");
 #endif
 	printf("  -W, --exit-on-warn Exit on the first warning.\n");
-	exit(0);
 }
 
 const char *ok(int res)
@@ -482,6 +481,7 @@ static void restoreState()
 	node->reopen();
 }
 
+__attribute__((noreturn))
 static void signal_handler_interrupt(int signum)
 {
 	restoreState();
@@ -1544,7 +1544,7 @@ int main(int argc, char **argv)
 		switch (ch) {
 		case OptHelp:
 			usage();
-			return 0;
+			exit(0);
 		case OptSetDevice:
 			device = make_devname(optarg, "video", media_bus_info);
 			break;
@@ -1669,13 +1669,13 @@ int main(int argc, char **argv)
 			fprintf(stderr, "Option `%s' requires a value\n",
 				argv[optind]);
 			usage();
-			return 1;
+			exit(1);
 		case '?':
 			if (argv[optind])
 				fprintf(stderr, "Unknown argument `%s'\n",
 					argv[optind]);
 			usage();
-			return 1;
+			exit(1);
 		}
 	}
 	if (optind < argc) {
@@ -1684,7 +1684,7 @@ int main(int argc, char **argv)
 			fprintf(stderr, "%s ", argv[optind++]);
 		fprintf(stderr, "\n");
 		usage();
-		return 1;
+		exit(1);
 	}
 	bool direct = !options[OptUseWrapper];
 	int fd;
diff --git a/utils/v4l2-dbg/v4l2-dbg.cpp b/utils/v4l2-dbg/v4l2-dbg.cpp
index cd387d1d..99c5a726 100644
--- a/utils/v4l2-dbg/v4l2-dbg.cpp
+++ b/utils/v4l2-dbg/v4l2-dbg.cpp
@@ -187,7 +187,6 @@ static void usage()
 	       "		     Sets step between two registers\n"
 	       "  --list-symbols     List the symbolic register names you can use, if any\n"
 	       "  --log-status       Log the board status in the kernel log [VIDIOC_LOG_STATUS]\n");
-	exit(0);
 }
 
 static std::string cap2s(unsigned cap)
@@ -429,7 +428,7 @@ int main(int argc, char **argv)
 
 	if (argc == 1) {
 		usage();
-		return 0;
+		exit(0);
 	}
 	for (i = 0; long_options[i].name; i++) {
 		if (!isalpha(long_options[i].val))
@@ -467,7 +466,7 @@ int main(int argc, char **argv)
 		switch (ch) {
 		case OptHelp:
 			usage();
-			return 0;
+			exit(0);
 
 		case OptSetDevice:
 			device = optarg;
-- 
2.25.3