From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 19 Jun 2012 15:25:28 +0000 (+0200)
Subject: login: initialize XDG_RUNTIME_DIR as /run/user/$UID instead of /run/user/$USER
X-Git-Tag: v186~142
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=2138e96918c7ed6fbf31f5df509f337a1973dfdd;ds=sidebyside

login: initialize XDG_RUNTIME_DIR as /run/user/$UID instead of /run/user/$USER

The sssd folks would like to place the kerberos credential cache in
XDG_RUNTIME_DIR, but need to do that in the PAM auth hooks, before
pam_systemd is run as part of the PAM session setup. Hence, in order to
make this easy for them: avoid usage of usernames, and use user IDs
instead thus making an additional NSS lookup unnecessary in the kerberos
bits, but still have the directory well-defined so that the kerberos
bits can determine it before pam_systemd is run.
---

diff --git a/src/login/logind-user.c b/src/login/logind-user.c
index 4622812e3..0a3f22ce9 100644
--- a/src/login/logind-user.c
+++ b/src/login/logind-user.c
@@ -259,9 +259,7 @@ static int user_mkdir_runtime_path(User *u) {
         }
 
         if (!u->runtime_path) {
-                p = strappend("/run/user/", u->name);
-
-                if (!p) {
+                if (asprintf(&p, "/run/user/%lu", (unsigned long) u->uid) < 0) {
                         log_error("Out of memory");
                         return -ENOMEM;
                 }