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ps: LUID format option impelemented

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This commit is contained in:
Jan Rybar 2018-02-09 18:17:36 +01:00 committed by Craig Small
parent 0d352aa3d9
commit 67bc433c17
2 changed files with 33 additions and 1 deletions
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30
ps/output.c
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@ -1213,6 +1213,34 @@ static int pr_sgi_p(char *restrict const outbuf, const proc_t *restrict const pp
return snprintf(outbuf, COLWID, "*");
}
/* LoginID implementation */
static int pr_luid(char *restrict const outbuf, const proc_t *restrict const pp){
char filename[48];
ssize_t num_read;
int fd;
u_int32_t luid;
snprintf(filename, sizeof filename, "/proc/%d/loginuid", pp->tgid);
if ((fd = open(filename, O_RDONLY, 0)) != -1) {
num_read = read(fd, outbuf, OUTBUF_SIZE - 1);
close(fd);
if (num_read > 0) {
outbuf[num_read] = '\0';
// processes born before audit have no LoginID set
luid = (u_int32_t) atoi(outbuf);
if (luid != -1)
return num_read;
}
}
outbuf[0] = '-';
outbuf[1] = '\0';
num_read = 1;
return num_read;
}
/************************* Systemd stuff ********************************/
static int pr_sd_unit(char *restrict const outbuf, const proc_t *restrict const pp){
return snprintf(outbuf, COLWID, "%s", pp->sd_unit);
@ -1526,7 +1554,7 @@ static const format_struct format_array[] = {
{"longtname", "TTY", pr_tty8, sr_tty, 8, 0, DEC, PO|LEFT},
{"lsession", "SESSION", pr_sd_session, sr_nop, 11, SD, LNX, ET|LEFT},
{"lstart", "STARTED", pr_lstart, sr_nop, 24, 0, XXX, ET|RIGHT},
{"luid", "LUID", pr_nop, sr_nop, 5, 0, LNX, ET|RIGHT}, /* login ID */
{"luid", "LUID", pr_luid, sr_nop, 5, 0, LNX, ET|RIGHT}, /* login ID */
{"luser", "LUSER", pr_nop, sr_nop, 8, USR, LNX, ET|USER}, /* login USER */
{"lwp", "LWP", pr_tasks, sr_tasks, 5, 0, SUN, TO|PIDMAX|RIGHT},
{"lxc", "LXC", pr_lxcname, sr_lxcname, 8, LXC, LNX, ET|LEFT},

4
ps/ps.1
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@ -1329,6 +1329,10 @@ displays the login session identifier of a process,
if systemd support has been included.
T}
luid LUID T{
displays Login ID associated with a process.
T}
lwp LWP T{
light weight process (thread) ID of the dispatchable entity (alias
.BR spid , \ tid ).