Fix bug in rename() that occures if new filename starts with the old filename

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/runner.py b/tests/runner.py
index ead85948..838c150d 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -3402,6 +3402,31 @@ Exiting setjmp function, level: 0, prev_jmp: -1
       '''
       self.do_run(src, 'z:1*', force_c=True)
 
+    def test_rename(self):
+      src = '''
+        #include <stdio.h>
+        #include <sys/stat.h>
+        #include <sys/types.h>
+        #include <assert.h>
+
+        int main() {
+          int err;
+          FILE* fid;
+
+          err = mkdir("/foo", 0777);
+          fid = fopen("/foo/bar", "w+");
+          fclose(fid);
+
+          err = rename("/foo/bar", "/foo/bar2");
+          printf("%d\\n", err);
+
+          err = rename("/foo", "/foo/foo");
+          printf("%d\\n", err);
+          return 0;
+        }
+      '''
+      self.do_run(src, '0\n-1\n', force_c=True)
+
     def test_alloca_stack(self):
       if self.emcc_args is None: return # too slow in other modes