From: Ben Pfaff <blp@cs.stanford.edu>
Date: Mon, 25 Oct 2004 22:56:10 +0000 (+0000)
Subject: Disallow the empty string as a file name.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?p=pintos-anon;a=commitdiff_plain;h=3a24478801bbb7d7f2fe791686b679acadefed5f

Disallow the empty string as a file name.
---

diff --git a/src/filesys/directory.c b/src/filesys/directory.c
index ec6ecd9..b08e7ee 100644
--- a/src/filesys/directory.c
+++ b/src/filesys/directory.c
@@ -140,7 +140,7 @@ dir_add (struct dir *d, const char *name, disk_sector_t inode_sector)
   ASSERT (name != NULL);
   ASSERT (lookup (d, name) == NULL);
 
-  if (strlen (name) > NAME_MAX)
+  if (*name == '\0' || strlen (name) > NAME_MAX)
     return false;
 
   for (i = 0; i < d->entry_cnt; i++)