#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
+#ifdef HAVE_LINUX_BTRFS_H
+#include <linux/btrfs.h>
+#endif
+#include "missing.h"
#include "udev.h"
-#define BTRFS_PATH_NAME_MAX 4087
-struct btrfs_ioctl_vol_args {
- int64_t fd;
- char name[BTRFS_PATH_NAME_MAX + 1];
-};
-#define BTRFS_IOCTL_MAGIC 0x94
-#define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, struct btrfs_ioctl_vol_args)
-
-static int builtin_btrfs(struct udev_device *dev, int argc, char *argv[], bool test)
-{
+static int builtin_btrfs(struct udev_device *dev, int argc, char *argv[], bool test) {
struct btrfs_ioctl_vol_args args;
- int fd;
+ _cleanup_close_ int fd = -1;
int err;
if (argc != 3 || !streq(argv[1], "ready"))
return EXIT_FAILURE;
- fd = open("/dev/btrfs-control", O_RDWR);
+ fd = open("/dev/btrfs-control", O_RDWR|O_CLOEXEC);
if (fd < 0)
return EXIT_FAILURE;
strscpy(args.name, sizeof(args.name), argv[2]);
err = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
- close(fd);
if (err < 0)
return EXIT_FAILURE;