attach: use LXC_INVALID_{G,U}ID macros

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/src/lxc/attach.c b/src/lxc/attach.c
index 267b948286ca62723612d2741dc2577fee472f46..6fce942f6d7e51be374b00050403c1d511ead02d 100644 (file)
--- a/src/lxc/attach.c
+++ b/src/lxc/attach.c
@@ -518,8 +518,8 @@ static void lxc_attach_get_init_uidgid(uid_t *init_uid, gid_t *init_gid)
        int ret;
        size_t line_bufsz = 0;
        long value = -1;
-       uid_t uid = (uid_t)-1;
-       gid_t gid = (gid_t)-1;
+       uid_t uid = LXC_INVALID_UID;
+       gid_t gid = LXC_INVALID_GID;
 
        ret = snprintf(proc_fn, LXC_PROC_STATUS_LEN, "/proc/%d/status", 1);
        if (ret < 0 || ret >= LXC_PROC_STATUS_LEN)
@@ -542,15 +542,15 @@ static void lxc_attach_get_init_uidgid(uid_t *init_uid, gid_t *init_gid)
                                gid = (gid_t)value;
                }
 
-               if (uid != (uid_t)-1 && gid != (gid_t)-1)
+               if (uid != LXC_INVALID_UID && gid != LXC_INVALID_GID)
                        break;
        }
 
        /* Only override arguments if we found something. */
-       if (uid != (uid_t)-1)
+       if (uid != LXC_INVALID_UID)
                *init_uid = uid;
 
-       if (gid != (gid_t)-1)
+       if (gid != LXC_INVALID_GID)
                *init_gid = gid;
 
        /* TODO: we should also parse supplementary groups and use