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ps: possibility to display slice unit for a process

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Library systemd-login offers possibility to display
name of a systemd slice unit for specific pid.

This patch adds output option "slice" which will
show name of systemd slice unit.

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
2013-08-07 11:57:24 +02:00
committed by Jaromir Capik
parent f5d15f4718
commit d66ed3350e
3 changed files with 26 additions and 2 deletions
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20
ps/output.c
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@@ -1292,6 +1292,23 @@ fail:
return 1;
}
static int pr_sd_slice(char *restrict const outbuf, const proc_t *restrict const pp){
int r;
size_t len;
char *slice;
r = sd_pid_get_slice(pp->tgid, &slice);
if(r<0) goto fail;
len = snprintf(outbuf, COLWID, "%s", slice);
free(slice);
return len;
fail:
outbuf[0] = '-';
outbuf[1] = '\0';
return 1;
}
#endif
/************************ Linux namespaces ******************************/
@@ -1675,6 +1692,9 @@ static const format_struct format_array[] = {
{"sigmask", "BLOCKED", pr_sigmask, sr_nop, 9, 0, XXX, TO|SIGNAL}, /*blocked*/
{"size", "SIZE", pr_swapable, sr_swapable, 5, 0, SCO, PO|RIGHT},
{"sl", "SL", pr_nop, sr_nop, 3, 0, XXX, AN|RIGHT},
#ifdef WITH_SYSTEMD
{"slice", "SLICE", pr_sd_slice, sr_nop, 31, 0, LNX, ET|LEFT},
#endif
{"spid", "SPID", pr_tasks, sr_tasks, 5, 0, SGI, TO|PIDMAX|RIGHT},
{"stackp", "STACKP", pr_stackp, sr_start_stack, 8, 0, LNX, PO|RIGHT}, /*start_stack*/
{"start", "STARTED", pr_start, sr_nop, 8, 0, XXX, ET|RIGHT},