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Date:      Tue, 22 Oct 2013 07:16:20 +0000 (UTC)
From:      Peter Holm <pho@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-user@freebsd.org
Subject:   svn commit: r256876 - user/pho/stress2/misc
Message-ID:  <201310220716.r9M7GKZD094760@svn.freebsd.org>
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Author: pho
Date: Tue Oct 22 07:16:20 2013
New Revision: 256876
URL: http://svnweb.freebsd.org/changeset/base/256876

Log:
  Added a regression test.
  
  Sponsored by:	EMC / Isilon storage division

Added:
  user/pho/stress2/misc/killpg.sh   (contents, props changed)

Added: user/pho/stress2/misc/killpg.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/killpg.sh	Tue Oct 22 07:16:20 2013	(r256876)
@@ -0,0 +1,161 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2013 EMC Corp.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+# Regression test for r241859: 
+# Return EPERM if processes were found but they were unable to be signaled.
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+here=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $here/$0 > killpg.c
+cc -o killpg -Wall -Wextra killpg.c
+rm -f killpg.c
+
+/tmp/killpg
+
+rm -f /tmp/killpg
+exit 0
+EOF
+#include <sys/types.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+pid_t gid, pid;
+
+#define LOOPS 100
+
+static void
+hand(int i __unused) {	/* handler */
+	_exit(0);
+}
+
+void
+nlooper(void)
+{
+	int i;
+
+	setproctitle("nlooper");
+	setpgrp(0, getpid());
+	for (i = 0; i < LOOPS; i++) {
+		if ((pid = fork()) == 0) {
+			signal(SIGINFO, hand);
+			if (arc4random() % 100 < 10)
+				usleep(arc4random() % 100);
+			_exit(0);
+		}
+		wait(NULL);
+	}
+	_exit(0);
+}
+
+void
+looper(void)
+{
+	int i;
+
+	setproctitle("looper");
+	setpgrp(0, getpid());
+	for (i = 0; i < LOOPS; i++) {
+		if ((pid = fork()) == 0) {
+			signal(SIGINFO, hand);
+			if (arc4random() % 100 < 10)
+				usleep(arc4random() % 100);
+			_exit(0);
+		}
+		wait(NULL);
+	}
+	unlink("cont");
+	_exit(0);
+}
+
+void
+killer(void)
+{
+	struct passwd *pw;
+	int i;
+
+	setproctitle("killer");
+	if ((pw = getpwnam("nobody")) == NULL)
+		err(1, "no such user: nobody");
+
+	if (setgroups(1, &pw->pw_gid) ||
+	    setegid(pw->pw_gid) || setgid(pw->pw_gid) ||
+	    seteuid(pw->pw_uid) || setuid(pw->pw_uid))
+		err(1, "Can't drop privileges to \"nobody\"");
+	endpwent();
+
+	if ((gid = fork()) == 0)
+		nlooper();	/* nobody looper */
+
+	usleep(200);
+	i = 0;
+	for (;;) {
+		if (i++ > 1000) {
+			if (access("cont", R_OK) == -1)
+				break;
+			i = 0;
+		}
+		if (killpg(gid, SIGINFO) == -1) {
+			if (errno == EPERM)
+				continue;
+			warn("FAIL killpg");
+		}
+	}
+	_exit(0);
+}
+
+int
+main(void)
+{
+	int fd;
+
+	if ((fd = open("cont", O_RDWR | O_CREAT, 0666)) == -1)
+		err(1, "creat");
+	close(fd);
+	signal(SIGINFO, SIG_IGN);
+
+	if ((gid = fork()) == 0)
+		looper();
+	if (fork() == 0)
+		killer();
+
+	wait(NULL);
+	wait(NULL);
+
+	return (0);
+}

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