bftw: Work around d_type being wrong for bind mounts on Linux

C.f. https://savannah.gnu.org/bugs/?54913
C.f. https://lkml.org/lkml/2019/2/11/2027
Fixes https://github.com/tavianator/bfs/issues/37

1 files changed, 17 insertions, 2 deletions

diff --git a/mtab.h b/mtab.h
index ef22716..a80deb2 100644
--- a/mtab.h
+++ b/mtab.h
@@ -22,6 +22,7 @@
 #define BFS_MTAB_H
 
 #include "stat.h"
+#include <stdbool.h>
 
 /**
  * A file system mount table.
@@ -31,7 +32,8 @@ struct bfs_mtab;
 /**
  * Parse the mount table.
  *
- * @return The parsed mount table, or NULL on error.
+ * @return
+ *         The parsed mount table, or NULL on error.
  */
 struct bfs_mtab *parse_bfs_mtab(void);
 
@@ -42,12 +44,25 @@ struct bfs_mtab *parse_bfs_mtab(void);
  *         The current mount table.
  * @param statbuf
  *         The bfs_stat() buffer for the file in question.
- * @return The type of file system containing this file, "unknown" if not known,
+ * @return
+ *         The type of file system containing this file, "unknown" if not known,
  *         or NULL on error.
  */
 const char *bfs_fstype(const struct bfs_mtab *mtab, const struct bfs_stat *statbuf);
 
 /**
+ * Check if a file could be a mount point.
+ *
+ * @param mtab
+ *         The current mount table.
+ * @param path
+ *         The path to check.
+ * @return
+ *         Whether the named file could be a mount point.
+ */
+bool bfs_maybe_mount(const struct bfs_mtab *mtab, const char *path);
+
+/**
  * Free a mount table.
  */
 void free_bfs_mtab(struct bfs_mtab *mtab);