git-remote-testgit: fix error handling

diff --git a/setup.c b/setup.c
index d7d8e3efbcbb77810dffac2a57fae7e4d5aa7f11..ce87900ce3c68ace0f231827bdda0e9a65ef15b3 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -382,7 +382,7 @@ const char *read_gitfile_gently(const char *path)
        const char *slash;
        struct stat st;
        int fd;
-       size_t len;
+       ssize_t len;
 
        if (stat(path, &st))
                return NULL;
@@ -432,6 +432,7 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
        const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
        const char *worktree;
        char *gitfile;
+       int offset;
 
        if (PATH_MAX - 40 < strlen(gitdirenv))
                die("'$%s' too big", GIT_DIR_ENVIRONMENT);
@@ -497,15 +498,15 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
                return NULL;
        }
 
-       if (!prefixcmp(cwd, worktree) &&
-           cwd[strlen(worktree)] == '/') { /* cwd inside worktree */
+       offset = dir_inside_of(cwd, worktree);
+       if (offset >= 0) {      /* cwd inside worktree? */
                set_git_dir(real_path(gitdirenv));
                if (chdir(worktree))
                        die_errno("Could not chdir to '%s'", worktree);
                cwd[len++] = '/';
                cwd[len] = '\0';
                free(gitfile);
-               return cwd + strlen(worktree) + 1;
+               return cwd + offset;
        }
 
        /* cwd outside worktree */