ps: possibility to display uid of session owner for a process

Library systemd-login offers possibility to display the Unix
user identifier of the owner of the session of a process.
This information will also be displayed for user processes which
are shared between multiple login sessions of the same user,
where sd_session will be blank.

This patch adds output option "sd_ouid" which will show
user UID or "-", when there is no owner for a process.

To maintain compatibility with non-systemd systems,
procps must be configured with --with-systemd option
to enable this option.

1 files changed, 4 insertions, 0 deletions

diff --git a/ps/ps.1 b/ps/ps.1
index f953e23..7d2ce73 100644
--- a/ps/ps.1
+++ b/ps/ps.1
@@ -1489,6 +1489,10 @@ SCHED_FIFO, SCHED_RR, SCHED_BATCH, SCHED_ISO, and SCHED_IDLE are respectively
 displayed as 0, 1, 2, 3, 4, and 5.
 T}
 
+sd_ouid	OWNER	T{
+displays the Unix user identifier of the owner of the session of a process.
+T}
+
 sd_session	SESSION	T{
 displays login session identifier of a process.
 T}