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ps: possibility to display machine name for a process

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Library systemd-login offers possibility to display
the name of the VM or container which process belongs to.

This patch adds output option "sd_machine" which will
show machine name or "-" when the name can not be determined.

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 2013-04-22 12:33:31 +02:00
parent 785776c10d
commit 4c1536d5f1
3 changed files with 22 additions and 2 deletions
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4
configure.ac
View File

@ -269,8 +269,8 @@ AC_ARG_WITH([systemd],
[], [with_systemd=no])
if test "x$with_systemd" != xno; then
PKG_CHECK_MODULES([SYSTEMD], [libsystemd-login], [], [
AC_CHECK_LIB(systemd-login, sd_pid_get_unit, [have_systemd=yes], [have_systemd=no])
PKG_CHECK_MODULES([SYSTEMD], [libsystemd-login >= 202], [], [
AC_CHECK_LIB(systemd-login, sd_pid_get_machine_name, [have_systemd=yes], [have_systemd=no])
if test "x$have_systemd" = xno; then
AC_MSG_ERROR([systemd support missing/incomplete])
fi

16
ps/output.c
View File

@ -1224,7 +1224,22 @@ fail:
return 1;
}
static int pr_sd_machine(char *restrict const outbuf, const proc_t *restrict const pp){
int r;
size_t len;
char *machine;
r = sd_pid_get_machine_name(pp->tgid, &machine);
if(r<0) goto fail;
len = snprintf(outbuf, COLWID, "%s", machine);
free(machine);
return len;
fail:
outbuf[0] = '-';
outbuf[1] = '\0';
return 1;
}
#endif
/****************** FLASK & seLinux security stuff **********************/
// move the bulk of this to libproc sometime
@ -1553,6 +1568,7 @@ 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_machine","MACHINE", pr_sd_machine, sr_nop, 31, 0, LNX, ET|LEFT},
{"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},

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_machine MACHINE T{
displays machine name for processes assigned to VM or container.
T}
sd_ouid OWNER T{
displays the Unix user identifier of the owner of the session of a process.
T}