bisect: error out when passing bad path parameters

diff --git a/path.c b/path.c
index 2470f78d3971acdf6a716e6d743e4fdaa1fc8a55..00d06332959af03b036b3d0b5ad115dd3b46b920 100644 (file)
--- a/path.c
+++ b/path.c
@@ -235,10 +235,15 @@ char *expand_user_path(const char *path)
        if (path[0] == '~') {
                const char *username = path + 1;
                size_t username_len = first_slash - username;
-               struct passwd *pw = getpw_str(username, username_len);
-               if (!pw)
-                       goto return_null;
-               strbuf_add(&user_path, pw->pw_dir, strlen(pw->pw_dir));
+               if (username_len == 0) {
+                       const char *home = getenv("HOME");
+                       strbuf_add(&user_path, home, strlen(home));
+               } else {
+                       struct passwd *pw = getpw_str(username, username_len);
+                       if (!pw)
+                               goto return_null;
+                       strbuf_add(&user_path, pw->pw_dir, strlen(pw->pw_dir));
+               }
                to_copy = first_slash;
        }
        strbuf_add(&user_path, to_copy, strlen(to_copy));