diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
commit | d0b2f91bede3bd5e3d24dd6803e56eee959c1797 (patch) | |
tree | 7fee4ab0509879c373c4f2cbd5b8a5be5b4041ee /tools/testing/selftests/media_tests/video_device_test.c | |
parent | e914f8eb445e8f74b00303c19c2ffceaedd16a05 (diff) |
Linux-libre 4.8.2-gnupck-4.8.2-gnu
Diffstat (limited to 'tools/testing/selftests/media_tests/video_device_test.c')
-rw-r--r-- | tools/testing/selftests/media_tests/video_device_test.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/tools/testing/selftests/media_tests/video_device_test.c b/tools/testing/selftests/media_tests/video_device_test.c new file mode 100644 index 000000000..66d419c28 --- /dev/null +++ b/tools/testing/selftests/media_tests/video_device_test.c @@ -0,0 +1,100 @@ +/* + * video_device_test - Video Device Test + * + * Copyright (c) 2016 Shuah Khan <shuahkh@osg.samsung.com> + * Copyright (c) 2016 Samsung Electronics Co., Ltd. + * + * This file is released under the GPLv2. + */ + +/* + * This file adds a test for Video Device. This test should not be included + * in the Kselftest run. This test should be run when hardware and driver + * that makes use of V4L2 API is present. + * + * This test opens user specified Video Device and calls video ioctls in a + * loop once every 10 seconds. + * + * Usage: + * sudo ./video_device_test -d /dev/videoX + * + * While test is running, remove the device or unbind the driver and + * ensure there are no use after free errors and other Oops in the + * dmesg. + * When possible, enable KaSan kernel config option for use-after-free + * error detection. +*/ + +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <errno.h> +#include <string.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <time.h> +#include <linux/videodev2.h> + +int main(int argc, char **argv) +{ + int opt; + char video_dev[256]; + int count; + struct v4l2_tuner vtuner; + struct v4l2_capability vcap; + int ret; + int fd; + + if (argc < 2) { + printf("Usage: %s [-d </dev/videoX>]\n", argv[0]); + exit(-1); + } + + /* Process arguments */ + while ((opt = getopt(argc, argv, "d:")) != -1) { + switch (opt) { + case 'd': + strncpy(video_dev, optarg, sizeof(video_dev) - 1); + video_dev[sizeof(video_dev)-1] = '\0'; + break; + default: + printf("Usage: %s [-d </dev/videoX>]\n", argv[0]); + exit(-1); + } + } + + /* Generate random number of interations */ + srand((unsigned int) time(NULL)); + count = rand(); + + /* Open Video device and keep it open */ + fd = open(video_dev, O_RDWR); + if (fd == -1) { + printf("Video Device open errno %s\n", strerror(errno)); + exit(-1); + } + + printf("\nNote:\n" + "While test is running, remove the device or unbind\n" + "driver and ensure there are no use after free errors\n" + "and other Oops in the dmesg. When possible, enable KaSan\n" + "kernel config option for use-after-free error detection.\n\n"); + + while (count > 0) { + ret = ioctl(fd, VIDIOC_QUERYCAP, &vcap); + if (ret < 0) + printf("VIDIOC_QUERYCAP errno %s\n", strerror(errno)); + else + printf("Video device driver %s\n", vcap.driver); + + ret = ioctl(fd, VIDIOC_G_TUNER, &vtuner); + if (ret < 0) + printf("VIDIOC_G_TUNER, errno %s\n", strerror(errno)); + else + printf("type %d rangelow %d rangehigh %d\n", + vtuner.type, vtuner.rangelow, vtuner.rangehigh); + sleep(10); + count--; + } +} |