When creating file bind mount destinations, check if they already exist

If they already exist as a regular file then we don't need to create
it, which is good because doing so would break if the filesystem
is readonly. I.e. that returns EROFS instead of EEXISTS in that case.

1 files changed, 2 insertions, 0 deletions

diff --git a/utils.h b/utils.h
index 915bed3..1cfe93a 100644
--- a/utils.h
+++ b/utils.h
@@ -89,6 +89,8 @@ int   copy_file      (const char  *src_path,
 int   create_file    (const char  *path,
                       mode_t       mode,
                       const char  *content);
+int   ensure_file    (const char  *path,
+                      mode_t       mode);
 int   get_file_mode  (const char *pathname);
 int   mkdir_with_parents (const char *pathname,
                           int         mode,