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pidof: new option to show cmdline-less PIDs (kernel workers), empty input fixed

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Jan Rybar 2020-12-22 00:14:41 +00:00 committed by Craig Small
parent 518547742b
commit b568f9f2b7
2 changed files with 15 additions and 2 deletions
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3
pidof.1
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@ -45,6 +45,9 @@ the current root directory of processes they do not own.
.IP \-x
Scripts too - this causes the program to also return process id's of
shells running the named scripts.
.IP \-w
Show also processes that do not have visible command line (e.g. kernel
worker threads).
.IP "-o \fIomitpid\fP"
Tells \fIpidof\fP to omit processes with that process id. The special
pid \fB%PPID\fP can be used to name the parent process of the \fIpidof\fP

14
pidof.c
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@ -57,6 +57,8 @@ static char *program = NULL;
static int opt_single_shot = 0; /* -s */
static int opt_scripts_too = 0; /* -x */
static int opt_rootdir_check = 0; /* -c */
static int opt_with_workers = 0; /* -w */
static char *pidof_root = NULL;
@ -71,6 +73,7 @@ static int __attribute__ ((__noreturn__)) usage(int opt)
fputs(_(" -s, --single-shot return one PID only\n"), fp);
fputs(_(" -c, --check-root omit processes with different root\n"), fp);
fputs(_(" -x also find shells running the named scripts\n"), fp);
fputs(_(" -w, --with-workers show kernel workers too\n"), fp);
fputs(_(" -o, --omit-pid <PID,...> omit processes with PID\n"), fp);
fputs(_(" -S, --separator SEP use SEP as separator put between PIDs"), fp);
fputs(USAGE_SEPARATOR, fp);
@ -173,7 +176,7 @@ static void select_procs (void)
}
}
if (!is_omitted(tid)) {
if (!is_omitted(tid) && ((p_cmdline && *p_cmdline) || opt_with_workers)) {
cmd_arg0 = (p_cmdline && *p_cmdline) ? *p_cmdline : "\0";
@ -196,6 +199,7 @@ static void select_procs (void)
if (!strcmp(program, cmd_arg0base) ||
!strcmp(program_base, cmd_arg0) ||
!strcmp(program, cmd_arg0) ||
(opt_with_workers && !strcmp(program, p_cmd)) ||
!strcmp(program, exe_link_base) ||
!strcmp(program, exe_link))
{
@ -295,13 +299,14 @@ int main (int argc, char **argv)
int first_pid = 1;
const char *separator = " ";
const char *opts = "scdnxmo:S:?Vh";
const char *opts = "scnxwmo:S:?Vh";
static const struct option longopts[] = {
{"check-root", no_argument, NULL, 'c'},
{"single-shot", no_argument, NULL, 's'},
{"omit-pid", required_argument, NULL, 'o'},
{"separator", required_argument, NULL, 'S'},
{"with-workers", no_argument, NULL, 'w'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0}
@ -327,6 +332,9 @@ int main (int argc, char **argv)
case 'x':
opt_scripts_too = 1;
break;
case 'w':
opt_with_workers = 1;
break;
case 'c':
if (geteuid() == 0) {
opt_rootdir_check = 1;
@ -361,6 +369,8 @@ int main (int argc, char **argv)
program = argv[optind++];
if (*program == '\0') continue;
select_procs(); /* get the list of matching processes */
if (proc_count) {