Recognise the -l switch with pkill - list kill command(s) used.

PR:		143558
Submitted by:	eitanadlerlist at gmail dot com
MFC after:	3 weeks

2 files changed, 16 insertions, 8 deletions

diff --git a/bin/pkill/pkill.1 b/bin/pkill/pkill.1
index 0c666e5..7188387 100644
--- a/bin/pkill/pkill.1
+++ b/bin/pkill/pkill.1
@@ -156,14 +156,16 @@ The value
 matches processes not in jail.
 .It Fl l
 Long output.
-Print the process name in addition to the process ID for each matching
+For
+.Nm pgrep ,
+print the process name in addition to the process ID for each matching
 process.
 If used in conjunction with
 .Fl f ,
 print the process ID and the full argument list for each matching process.
-This option can only be used with the
-.Nm pgrep
-command.
+For
+.Nm pkill ,
+display the kill command used for each process killed.
 .It Fl n
 Select only the newest (most recently started) of the matching processes.
 .It Fl o
diff --git a/bin/pkill/pkill.c b/bin/pkill/pkill.c
index 7876b87..d9959c58 100644
--- a/bin/pkill/pkill.c
+++ b/bin/pkill/pkill.c
@@ -128,7 +128,7 @@ main(int argc, char **argv)
 {
 	char buf[_POSIX2_LINE_MAX], *mstr, **pargv, *p, *q, *pidfile;
 	const char *execf, *coref;
-	int ancestors, debug_opt;
+	int ancestors, debug_opt, did_action;
 	int i, ch, bestidx, rv, criteria, pidfromfile, pidfilelock;
 	size_t jsz;
 	int (*action)(const struct kinfo_proc *);
@@ -242,8 +242,6 @@ main(int argc, char **argv)
 			criteria = 1;
 			break;
 		case 'l':
-			if (!pgrep)
-				usage();
 			longfmt = 1;
 			break;
 		case 'n':
@@ -530,16 +528,24 @@ main(int argc, char **argv)
 	/*
 	 * Take the appropriate action for each matched process, if any.
 	 */
+	did_action = 0;
 	for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) {
 		if (PSKIP(kp))
 			continue;
 		if (selected[i]) {
+			if (longfmt && !pgrep) {
+				did_action = 1;
+				printf("kill -%d %d\n", signum, kp->ki_pid);
+			}
 			if (inverse)
 				continue;
 		} else if (!inverse)
 			continue;
 		rv |= (*action)(kp);
 	}
+	if (!did_action && !pgrep && longfmt)
+		fprintf(stderr,
+		    "No matching processes belonging to you were found\n");
 
 	exit(rv ? STATUS_MATCH : STATUS_NOMATCH);
 }
@@ -552,7 +558,7 @@ usage(void)
 	if (pgrep)
 		ustr = "[-LSfilnoqvx] [-d delim]";
 	else
-		ustr = "[-signal] [-ILfinovx]";
+		ustr = "[-signal] [-ILfilnovx]";
 
 	fprintf(stderr,
 		"usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n"