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

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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.
This commit is contained in:
Lukas Nykryn
2013-04-17 10:32:50 +02:00
parent 716d96b8eb
commit 785776c10d
2 changed files with 20 additions and 0 deletions
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16
ps/output.c
View File

@@ -1209,6 +1209,21 @@ fail:
return 1;
}
static int pr_sd_ouid(char *restrict const outbuf, const proc_t *restrict const pp){
int r;
size_t len;
uid_t ouid;
r = sd_pid_get_owner_uid(pp->tgid, &ouid);
if(r<0) goto fail;
return snprintf(outbuf, COLWID, "%d", ouid);
fail:
outbuf[0] = '-';
outbuf[1] = '\0';
return 1;
}
#endif
/****************** FLASK & seLinux security stuff **********************/
@@ -1538,6 +1553,7 @@ static const format_struct format_array[] = {
{"scnt", "SCNT", pr_nop, sr_nop, 4, 0, DEC, AN|RIGHT}, /* man page misspelling of scount? */
{"scount", "SC", pr_nop, sr_nop, 4, 0, AIX, AN|RIGHT}, /* scnt==scount, DEC claims both */
#ifdef WITH_SYSTEMD
{"sd_ouid", "OWNER", pr_sd_ouid, sr_nop, 5, 0, LNX, ET|LEFT},
{"sd_session","SESSION", pr_sd_session, sr_nop, 11, 0, LNX, ET|LEFT},
{"sd_unit", "UNIT", pr_sd_unit, sr_nop, 31, 0, LNX, ET|LEFT},
#endif

4
ps/ps.1
View File

@@ -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}