cooker, seitan: Add support for GID/UID in context

Similarly to namespace specifications, the special value "caller", as
well as login/group names and numeric UID/GIDs are supported.

Example of usage in demo/mknod.hjson. Light on checks and with some
TODOs left behind at the moment.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/operations.h b/operations.h
index 9f2e2d6..6cff7a8 100644
--- a/operations.h
+++ b/operations.h
@@ -37,6 +37,8 @@ struct arg_clone {
 	const void *args[6];
 	char ns_path[NS_TYPE_MAX + 1][PATH_MAX];
 	char cwd[PATH_MAX];
+	uid_t uid;
+	gid_t gid;
 	long ret;
 	int err;
 };