t7001: add test case for --dry-run

diff --git a/shallow.c b/shallow.c
index 54359d549075b5cfe1670ca979ff3cf5eeedc9d1..e8429a9a845f98f4a73299c044463ce99ebbea93 100644 (file)
--- a/shallow.c
+++ b/shallow.c
@@ -296,7 +296,7 @@ const char *setup_temporary_shallow(const struct oid_array *extra)
        if (write_shallow_commits(&sb, 0, extra)) {
                fd = xmks_tempfile(&temporary_shallow, git_path("shallow_XXXXXX"));
 
-               if (write_in_full(fd, sb.buf, sb.len) != sb.len)
+               if (write_in_full(fd, sb.buf, sb.len) < 0)
                        die_errno("failed to write to %s",
                                  get_tempfile_path(&temporary_shallow));
                close_tempfile(&temporary_shallow);
@@ -321,7 +321,7 @@ void setup_alternate_shallow(struct lock_file *shallow_lock,
                                       LOCK_DIE_ON_ERROR);
        check_shallow_file_for_update();
        if (write_shallow_commits(&sb, 0, extra)) {
-               if (write_in_full(fd, sb.buf, sb.len) != sb.len)
+               if (write_in_full(fd, sb.buf, sb.len) < 0)
                        die_errno("failed to write to %s",
                                  get_lock_file_path(shallow_lock));
                *alternate_shallow_file = get_lock_file_path(shallow_lock);
@@ -368,7 +368,7 @@ void prune_shallow(int show_only)
                                       LOCK_DIE_ON_ERROR);
        check_shallow_file_for_update();
        if (write_shallow_commits_1(&sb, 0, NULL, SEEN_ONLY)) {
-               if (write_in_full(fd, sb.buf, sb.len) != sb.len)
+               if (write_in_full(fd, sb.buf, sb.len) < 0)
                        die_errno("failed to write to %s",
                                  get_lock_file_path(&shallow_lock));
                commit_lock_file(&shallow_lock);