Merge "init: uevent: Add msm video symbolic link handling" into cm-10.2 (1b96c7de) · Commits · e / os / android_system_core

init/devices.c

+37 −0

Original line number	Diff line number	Diff line
		@@ -358,6 +358,41 @@ static void parse_event(const char msg, struct uevent uevent)
		uevent->firmware, uevent->major, uevent->minor);
		}

		static char *get_v4l_device_symlinks(struct uevent uevent)
		{
		char **links;
		int fd = -1;
		int nr;
		char link_name_path[256];
		char link_name[64];

		if (strncmp(uevent->path, "/devices/virtual/video4linux/video", 34))
		return NULL;

		links = malloc(sizeof(char ) 2);
		if (!links)
		return NULL;
		memset(links, 0, sizeof(char ) 2);

		snprintf(link_name_path, sizeof(link_name_path), "%s%s%s",
		SYSFS_PREFIX, uevent->path, "/link_name");
		fd = open(link_name_path, O_RDONLY);
		if (fd < 0)
		goto err;
		nr = read(fd, link_name, sizeof(link_name) - 1);
		close(fd);
		if (nr <= 0)
		goto err;
		link_name[nr] = '\0';
		if (asprintf(&links[0], "/dev/video/%s", link_name) <= 0)
		links[0] = NULL;

		return links;
		err:
		free(links);
		return NULL;
		}

		static char *get_character_device_symlinks(struct uevent uevent)
		{
		const char *parent;
		@@ -628,6 +663,8 @@ static void handle_generic_device_event(struct uevent *uevent)
		} else
		base = "/dev/";
		links = get_character_device_symlinks(uevent);
		if (!links)
		links = get_v4l_device_symlinks(uevent);

		if (!devpath[0])
		snprintf(devpath, sizeof(devpath), "%s%s", base, name);