sh: Allow kill %job on jobs started without job control.

When killing a %job started without job control, kill all processes in it.
As with process groups and zombies, if any process in the job can be killed
or has already terminated, the command is successful.

This also fixes occasional failures of the builtins/kill1.0 test.

bin/kill/kill.c

@@ -67,7 +67,7 @@ static void usage(void);
 int
 main(int argc, char *argv[])
 {
-	int errors, numsig, pid;
+	int errors, numsig, pid, ret;
 	char *ep;
 
 	if (argc < 2)
@@ -133,22 +133,17 @@ main(int argc, char *argv[])
 
 	for (errors = 0; argc; argc--, argv++) {
 #ifdef SHELL
-		if (**argv == '%') {
-			pid = getjobpgrp(*argv);
-			/*
-			 * Silently ignore terminated jobs, like the kernel
-			 * silently ignores zombies.
-			 */
-			if (pid == 0)
-				continue;
-		} else
+		if (**argv == '%')
+			ret = killjob(*argv, numsig);
+		else
 #endif
 		{
 			pid = strtol(*argv, &ep, 10);
 			if (!**argv || *ep)
 				errx(2, "illegal process id: %s", *argv);
+			ret = kill(pid, numsig);
 		}
-		if (kill(pid, numsig) == -1) {
+		if (ret == -1) {
 			warn("%s", *argv);
 			errors = 1;
 		}

bin/sh/bltin/bltin.h

@@ -74,6 +74,6 @@
 
 pointer stalloc(int);
 void error(const char *, ...) __printf0like(1, 2);
-pid_t getjobpgrp(char *);
+int killjob(const char *, int);
 
 extern char *commandname;

bin/sh/jobs.c

@@ -95,9 +95,9 @@ static void restartjob(struct job *);
 #endif
 static void freejob(struct job *);
 static int waitcmdloop(struct job *);
-pid_t getjobpgrp(char *);
 static struct job *getjob_nonotfound(const char *);
 static struct job *getjob(const char *);
+pid_t killjob(const char *, int);
 static pid_t dowait(int, struct job *);
 static void checkzombies(void);
 static void cmdtxt(union node *);
@@ -639,15 +639,26 @@ getjob(const char *name)
 }
 
 
-pid_t
-getjobpgrp(char *name)
+int
+killjob(const char *name, int sig)
 {
 	struct job *jp;
+	int i, ret;
 
 	jp = getjob(name);
 	if (jp->state == JOBDONE)
 		return 0;
-	return -jp->ps[0].pid;
+	if (jp->jobctl)
+		return kill(-jp->ps[0].pid, sig);
+	ret = -1;
+	errno = ESRCH;
+	for (i = 0; i < jp->nprocs; i++)
+		if (jp->ps[i].status == -1 || WIFSTOPPED(jp->ps[i].status)) {
+			if (kill(jp->ps[i].pid, sig) == 0)
+				ret = 0;
+		} else
+			ret = 0;
+	return ret;
 }
 
 /*

bin/sh/tests/builtins/Makefile

@@ -86,7 +86,7 @@ FILES+=		hash3.0 hash3.0.stdout
 FILES+=		hash4.0
 FILES+=		jobid1.0
 FILES+=		jobid2.0
-FILES+=		kill1.0
+FILES+=		kill1.0 kill2.0
 FILES+=		lineno.0 lineno.0.stdout
 FILES+=		lineno2.0
 FILES+=		local1.0

bin/sh/tests/builtins/kill2.0

@@ -0,0 +1,7 @@
+# $FreeBSD$
+
+sleep 1 | sleep 1 &
+kill %+
+wait "$!"
+r=$?
+[ "$r" -gt 128 ] && [ "$(kill -l "$r")" = TERM ]