fix wrong dst path for source path under '/'

When a source file path is /FILE, its dest path would be dst/ILE.
This commit fixes this issue (#8).

src/path.c

@@ -106,10 +106,18 @@ static int resolve_dst_path(const char *src_file_path, char *dst_file_path,
                 mscp_set_error("dirname: %s", strerrno());
                 return -1;
         }
-        if (strlen(prefix) == 1 && prefix[0] == '.')
-                offset = 0;
-        else
-                offset = strlen(prefix) + 1;
+
+	offset = strlen(prefix) + 1;
+	if (strlen(prefix) == 1) { /* corner cases */
+		switch (prefix[0]) {
+		case '.':
+			offset = 0;
+			break;
+		case '/':
+			offset = 1;
+			break;
+		}
+	}
 
         if (!a->src_path_is_dir && !a->dst_path_is_dir) {
                 /* src path is file. dst path is (1) file, or (2) does not exist.

test/test_e2e.py

@@ -216,7 +216,7 @@ def test_copy_file_under_root_to_dir(mscp, src_prefix, dst_prefix):
             dst_prefix + os.path.dirname(dst.path)])
     assert check_same_md5sum(src, dst)
     src.cleanup()
-    dst.cleanup()
+    dst.cleanup(preserve_dir = True)
 
 
 @pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)

test/util.py

@@ -46,8 +46,10 @@ def make_content_random(self):
         with open(self.path, "wb") as f:
             f.write(os.urandom(self.size))
 
-    def cleanup(self):
+    def cleanup(self, preserve_dir = False):
         os.remove(self.path)
+        if preserve_dir:
+            return
         tmp = os.path.dirname(self.path)
         while tmp and not tmp in [".", "/"]:
             if len(os.listdir(tmp)) == 0: