#include <limits.h>
#include <blkid/blkid.h>
#include <sys/vfs.h>
+#include <sys/statfs.h>
+#include <linux/magic.h>
#include "kerncompat.h"
#include "radix-tree.h"
return fdmnt;
}
+/*
+ * Do the following checks before calling open_file_or_dir():
+ * 1: path is in a btrfs filesystem
+ * 2: path is a directory
+ */
+int btrfs_open_dir(const char *path, DIR **dirstream, int verbose)
+{
+ struct statfs stfs;
+ struct stat st;
+ int ret;
+
+ if (statfs(path, &stfs) != 0) {
+ if (verbose)
+ fprintf(stderr,
+ "ERROR: can't access '%s': %s\n",
+ path, strerror(errno));
+ return -1;
+ }
+
+ if (stfs.f_type != BTRFS_SUPER_MAGIC) {
+ if (verbose)
+ fprintf(stderr,
+ "ERROR: not a btrfs filesystem: %s\n",
+ path);
+ return -2;
+ }
+
+ if (stat(path, &st) != 0) {
+ if (verbose)
+ fprintf(stderr,
+ "ERROR: can't access '%s': %s\n",
+ path, strerror(errno));
+ return -1;
+ }
+
+ if (!S_ISDIR(st.st_mode)) {
+ if (verbose)
+ fprintf(stderr,
+ "ERROR: not a directory: %s\n",
+ path);
+ return -3;
+ }
+
+ ret = open_file_or_dir(path, dirstream);
+ if (ret < 0) {
+ if (verbose)
+ fprintf(stderr,
+ "ERROR: can't access '%s': %s\n",
+ path, strerror(errno));
+ }
+
+ return ret;
+}
+
/* checks if a device is a loop device */
static int is_loop_device (const char* device) {
struct stat statbuf;
int is_mount_point(const char *file);
int check_arg_type(const char *input);
int open_path_or_dev_mnt(const char *path, DIR **dirstream);
+int btrfs_open_dir(const char *path, DIR **dirstream, int verbose);
u64 btrfs_device_size(int fd, struct stat *st);
/* Helper to always get proper size of the destination string */
#define strncpy_null(dest, src) __strncpy__null(dest, src, sizeof(dest))