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ps: new format option 'exe' now shows executable path if unavail from cmdline

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Red Hat Bugzilla #1399206
This commit is contained in:
Jan Rybar 2018-06-08 16:38:14 +02:00 committed by Craig Small
parent fa389631ca
commit b556bf5ba8
2 changed files with 29 additions and 0 deletions
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21
ps/output.c
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@ -1250,6 +1250,26 @@ static int pr_luid(char *restrict const outbuf, const proc_t *restrict const pp)
}
/* full path to executable */
static int pr_exe(char *restrict const outbuf, const proc_t *restrict const pp){
char filename[48];
ssize_t num_read;
snprintf(filename, sizeof filename, "/proc/%d/exe", pp->tgid);
num_read = readlink(filename, outbuf, OUTBUF_SIZE-1);
if (num_read > 0) {
outbuf[num_read] = '\0';
}
else {
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);
@ -1533,6 +1553,7 @@ static const format_struct format_array[] = {
{"etimes", "ELAPSED", pr_etimes, sr_etime, 7, 0, BSD, ET|RIGHT}, /* FreeBSD */
{"euid", "EUID", pr_euid, sr_euid, 5, 0, LNX, ET|RIGHT},
{"euser", "EUSER", pr_euser, sr_euser, 8, USR, LNX, ET|USER},
{"exe", "EXE", pr_exe, sr_nop, 27, 0, LNX, PO|UNLIMITED},
{"f", "F", pr_flag, sr_flags, 1, 0, XXX, ET|RIGHT}, /*flags*/
{"fgid", "FGID", pr_fgid, sr_fgid, 5, 0, LNX, ET|RIGHT},
{"fgroup", "FGROUP", pr_fgroup, sr_fgroup, 8, GRP, LNX, ET|USER},

8
ps/ps.1
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@ -1251,6 +1251,14 @@ option can be used to force the decimal representation. (alias
.BR uname ", " user ).
T}
exe EXE T{
path to the executable. Useful if path cannot be printed via
.BR cmd ", " comm
or
.BR args
format options.
T}
f F T{
flags associated with the process, see the
.B PROCESS FLAGS