diff options
Diffstat (limited to 'src/udev/v4l_id')
| -rw-r--r-- | src/udev/v4l_id/v4l_id.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/src/udev/v4l_id/v4l_id.c b/src/udev/v4l_id/v4l_id.c index 08d3efa857..0ebe434639 100644 --- a/src/udev/v4l_id/v4l_id.c +++ b/src/udev/v4l_id/v4l_id.c @@ -26,17 +26,18 @@ #include <sys/ioctl.h> #include <linux/videodev2.h> -int main (int argc, char *argv[]) -{ +#include "util.h" + +int main(int argc, char *argv[]) { static const struct option options[] = { { "help", no_argument, NULL, 'h' }, {} }; - int fd; + _cleanup_close_ int fd = -1; char *device; struct v4l2_capability v2cap; - while (1) { + for (;;) { int option; option = getopt_long(argc, argv, "h", options, NULL); @@ -45,7 +46,10 @@ int main (int argc, char *argv[]) switch (option) { case 'h': - printf("Usage: v4l_id [-h,--help] <device file>\n\n"); + printf("%s [-h,--help] <device file>\n\n" + "Video4Linux device identification.\n\n" + " -h Print this message\n" + , program_invocation_short_name); return 0; default: return 1; @@ -55,11 +59,11 @@ int main (int argc, char *argv[]) if (device == NULL) return 2; - fd = open (device, O_RDONLY); + fd = open(device, O_RDONLY); if (fd < 0) return 3; - if (ioctl (fd, VIDIOC_QUERYCAP, &v2cap) == 0) { + if (ioctl(fd, VIDIOC_QUERYCAP, &v2cap) == 0) { printf("ID_V4L_VERSION=2\n"); printf("ID_V4L_PRODUCT=%s\n", v2cap.card); printf("ID_V4L_CAPABILITIES=:"); @@ -78,6 +82,5 @@ int main (int argc, char *argv[]) printf("\n"); } - close (fd); return 0; } |