[PATCH v3 2/6] v4l2-ctl: Add version command

[Paul Elder <paul.elder@xxxxxxxxxxxxxxxx>]

Add a --version option to v4l2-ctl to retrieve the version of v4l2-ctl.

Signed-off-by: Paul Elder <paul.elder@xxxxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>

---
Changes in v3:
- embed PACKAGE_VERSION instead of string concatenation
---
 utils/v4l2-ctl/v4l2-ctl-common.cpp | 1 +
 utils/v4l2-ctl/v4l2-ctl.cpp        | 9 +++++++++
 utils/v4l2-ctl/v4l2-ctl.h          | 1 +
 3 files changed, 11 insertions(+)

diff --git a/utils/v4l2-ctl/v4l2-ctl-common.cpp b/utils/v4l2-ctl/v4l2-ctl-common.cpp
index 47f5da1a..9b785cbf 100644
--- a/utils/v4l2-ctl/v4l2-ctl-common.cpp
+++ b/utils/v4l2-ctl/v4l2-ctl-common.cpp
@@ -121,6 +121,7 @@ void common_usage()
 	       "  --silent           only set the result code, do not print any messages\n"
 	       "  --sleep <secs>     sleep <secs>, call QUERYCAP and close the file handle\n"
 	       "  --verbose          turn on verbose ioctl status reporting\n"
+	       "  --version          show version information\n"
 	       );
 }
 
diff --git a/utils/v4l2-ctl/v4l2-ctl.cpp b/utils/v4l2-ctl/v4l2-ctl.cpp
index 4972591e..ac66b814 100644
--- a/utils/v4l2-ctl/v4l2-ctl.cpp
+++ b/utils/v4l2-ctl/v4l2-ctl.cpp
@@ -284,6 +284,7 @@ static struct option long_options[] = {
 	{"stream-out-user", optional_argument, 0, OptStreamOutUser},
 	{"stream-out-dmabuf", no_argument, 0, OptStreamOutDmaBuf},
 	{"list-patterns", no_argument, 0, OptListPatterns},
+	{"version", no_argument, 0, OptVersion},
 	{0, 0, 0, 0}
 };
 
@@ -306,6 +307,11 @@ static void usage_all()
        edid_usage();
 }
 
+static void version()
+{
+	printf("v4l2-ctl %s\n", PACKAGE_VERSION);
+}
+
 int test_ioctl(int fd, unsigned long cmd, void *arg)
 {
 	return options[OptUseWrapper] ? v4l2_ioctl(fd, cmd, arg) : ioctl(fd, cmd, arg);
@@ -1245,6 +1251,9 @@ int main(int argc, char **argv)
 		case OptSleep:
 			secs = strtoul(optarg, 0L, 0);
 			break;
+		case OptVersion:
+			version();
+			return 0;
 		case ':':
 			fprintf(stderr, "Option '%s' requires a value\n",
 					argv[optind]);
diff --git a/utils/v4l2-ctl/v4l2-ctl.h b/utils/v4l2-ctl/v4l2-ctl.h
index 28e50471..27a3ca35 100644
--- a/utils/v4l2-ctl/v4l2-ctl.h
+++ b/utils/v4l2-ctl/v4l2-ctl.h
@@ -263,6 +263,7 @@ enum Option {
 	OptHelpStreaming,
 	OptHelpEdid,
 	OptHelpAll,
+	OptVersion,
 	OptLast = 512
 };
 
-- 
2.27.0