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diff -up ./ps/output.c.ori ./ps/output.c
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--- ./ps/output.c.ori 2016-07-09 23:49:25.825306872 +0200
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+++ ./ps/output.c 2018-02-26 15:09:38.291043349 +0100
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@@ -1201,6 +1201,34 @@ static int pr_sgi_p(char *restrict const
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return snprintf(outbuf, COLWID, "*");
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}
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+/* LoginID implementation */
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+static int pr_luid(char *restrict const outbuf, const proc_t *restrict const pp){
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+ char filename[48];
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+ ssize_t num_read;
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+ int fd;
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+ u_int32_t luid;
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+
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+ snprintf(filename, sizeof filename, "/proc/%d/loginuid", pp->tgid);
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+
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+ if ((fd = open(filename, O_RDONLY, 0)) != -1) {
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+ num_read = read(fd, outbuf, OUTBUF_SIZE - 1);
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+ close(fd);
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+ if (num_read > 0) {
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+ outbuf[num_read] = '\0';
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+
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+ // processes born before audit have no LoginID set
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+ luid = (u_int32_t) atoi(outbuf);
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+ if (luid != -1)
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+ return num_read;
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+ }
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+ }
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+ outbuf[0] = '-';
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+ outbuf[1] = '\0';
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+ num_read = 1;
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+ return num_read;
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+}
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+
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+
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/************************* Systemd stuff ********************************/
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static int pr_sd_unit(char *restrict const outbuf, const proc_t *restrict const pp){
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return snprintf(outbuf, COLWID, "%s", pp->sd_unit);
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@@ -1513,7 +1541,7 @@ static const format_struct format_array[
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{"longtname", "TTY", pr_tty8, sr_tty, 8, 0, DEC, PO|LEFT},
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{"lsession", "SESSION", pr_sd_session, sr_nop, 11, SD, LNX, ET|LEFT},
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{"lstart", "STARTED", pr_lstart, sr_nop, 24, 0, XXX, ET|RIGHT},
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-{"luid", "LUID", pr_nop, sr_nop, 5, 0, LNX, ET|RIGHT}, /* login ID */
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+{"luid", "LUID", pr_luid, sr_nop, 5, 0, LNX, ET|RIGHT}, /* login ID */
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{"luser", "LUSER", pr_nop, sr_nop, 8, USR, LNX, ET|USER}, /* login USER */
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{"lwp", "LWP", pr_tasks, sr_tasks, 5, 0, SUN, TO|PIDMAX|RIGHT},
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{"lxc", "LXC", pr_lxcname, sr_lxcname, 8, LXC, LNX, ET|LEFT},
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diff -up ./ps/ps.1.ori ./ps/ps.1
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--- ./ps/ps.1.ori 2016-05-07 13:15:32.014390172 +0200
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+++ ./ps/ps.1 2018-02-26 15:09:38.292043345 +0100
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@@ -1322,6 +1322,10 @@ displays the login session identifier of
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if systemd support has been included.
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T}
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+luid LUID T{
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+displays Login ID associated with a process.
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+T}
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+
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lwp LWP T{
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light weight process (thread) ID of the dispatchable entity (alias
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.BR spid , \ tid ).
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