win32: allow symlinks to directories to be unlinked

Windows distinguishes between symlinks to directories and files.
A symlink to a directory must be deleted by calling rmdir(2)
rather than unlink(2).

1 files changed, 13 insertions, 1 deletions

diff --git a/win32/mingw.c b/win32/mingw.c
index 15529ed58..41dba9857 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -1316,9 +1316,21 @@ int fcntl(int fd, int cmd, ...)
 #undef unlink
 int mingw_unlink(const char *pathname)
 {
+        int ret;
+        struct stat st;
+
         /* read-only files cannot be removed */
         chmod(pathname, 0666);
-        return unlink(pathname);
+
+        ret = unlink(pathname);
+        if (ret == -1 && errno == EACCES) {
+                /* a symlink to a directory needs to be removed by calling rmdir */
+                if (lstat(pathname, &st) == 0 && S_ISLNK(st.st_mode)) {
+                        return rmdir(pathname);
+                }
+                errno = EACCES;
+        }
+        return ret;
 }
 
 #undef strftime