From: Lennart Poettering <lennart@poettering.net>
Date: Sat, 2 Dec 2017 12:07:18 +0000 (+0100)
Subject: nss-elogind: tweak checks when we consult PID 1 for dynamic UID/GID lookups
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=a4a32b7b726008bf96347d17be080d0406d7fe6e;p=elogind.git

nss-elogind: tweak checks when we consult PID 1 for dynamic UID/GID lookups

Instead of contacting PID 1 for dynamic UID/GID lookups for all
UIDs/GIDs that do not qualify as "system" do the more precise check
instead: check if they actually qualify for the "dynamic" range.
---

diff --git a/src/basic/user-util.h b/src/basic/user-util.h
index b619239b8..d97f4821a 100644
--- a/src/basic/user-util.h
+++ b/src/basic/user-util.h
@@ -71,6 +71,10 @@ static inline bool uid_is_dynamic(uid_t uid) {
         return DYNAMIC_UID_MIN <= uid && uid <= DYNAMIC_UID_MAX;
 }
 
+static inline bool gid_is_dynamic(gid_t gid) {
+        return uid_is_dynamic((uid_t) gid);
+}
+
 static inline bool uid_is_system(uid_t uid) {
         return uid <= SYSTEM_UID_MAX;
 }