Remove "." and ".." from Dir.glob with FNM_DOTMATCH [Bug #17280]

Co-authored-by: Jeremy Evans <[email protected]>

1 files changed, 8 insertions, 2 deletions

diff --git a/dir.c b/dir.c
index bedbdd9f83..48c9eaefa0 100644
--- a/dir.c
+++ b/dir.c
@@ -222,6 +222,7 @@ typedef enum {
 #define FNM_SHORTNAME	0
 #endif
 #define FNM_GLOB_NOSORT 0x40
+#define FNM_GLOB_SKIPDOT 0x80
 
 #define FNM_NOMATCH	1
 #define FNM_ERROR	2
@@ -2413,6 +2414,10 @@ glob_helper(
             }
             return status;
         }
+
+	int skipdot = (flags & FNM_GLOB_SKIPDOT);
+	flags |= FNM_GLOB_SKIPDOT;
+
 	while ((dp = glob_getent(&globent, flags, enc)) != NULL) {
 	    char *buf;
 	    rb_pathtype_t new_pathtype = path_unknown;
@@ -2423,11 +2428,12 @@ glob_helper(
 
 	    name = dp->d_name;
 	    namlen = dp->d_namlen;
-	    if (recursive && name[0] == '.') {
+	    if (name[0] == '.') {
 		++dotfile;
 		if (namlen == 1) {
 		    /* unless DOTMATCH, skip current directories not to recurse infinitely */
-		    if (!(flags & FNM_DOTMATCH)) continue;
+		    if (recursive && !(flags & FNM_DOTMATCH)) continue;
+		    if (skipdot) continue;
 		    ++dotfile;
 		    new_pathtype = path_directory; /* force to skip stat/lstat */
 		}