18a272653SPeter Holm#!/bin/sh 28a272653SPeter Holm 38a272653SPeter Holm# 48a272653SPeter Holm# Copyright (c) 2013 EMC Corp. 58a272653SPeter Holm# All rights reserved. 68a272653SPeter Holm# 78a272653SPeter Holm# Redistribution and use in source and binary forms, with or without 88a272653SPeter Holm# modification, are permitted provided that the following conditions 98a272653SPeter Holm# are met: 108a272653SPeter Holm# 1. Redistributions of source code must retain the above copyright 118a272653SPeter Holm# notice, this list of conditions and the following disclaimer. 128a272653SPeter Holm# 2. Redistributions in binary form must reproduce the above copyright 138a272653SPeter Holm# notice, this list of conditions and the following disclaimer in the 148a272653SPeter Holm# documentation and/or other materials provided with the distribution. 158a272653SPeter Holm# 168a272653SPeter Holm# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 178a272653SPeter Holm# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 188a272653SPeter Holm# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 198a272653SPeter Holm# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 208a272653SPeter Holm# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 218a272653SPeter Holm# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 228a272653SPeter Holm# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 238a272653SPeter Holm# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 248a272653SPeter Holm# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 258a272653SPeter Holm# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 268a272653SPeter Holm# SUCH DAMAGE. 278a272653SPeter Holm# 288a272653SPeter Holm 298a272653SPeter Holm# Regression test for r241859: 308a272653SPeter Holm# Return EPERM if processes were found but they were unable to be signaled. 318a272653SPeter Holm 328a272653SPeter Holm[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 338a272653SPeter Holm 348a272653SPeter Holm. ../default.cfg 358a272653SPeter Holm 368a272653SPeter Holmhere=`pwd` 378a272653SPeter Holmcd /tmp 388a272653SPeter Holmsed '1,/^EOF/d' < $here/$0 > killpg.c 398a272653SPeter Holmmycc -o killpg -Wall -Wextra killpg.c || exit 1 408a272653SPeter Holmrm -f killpg.c 418a272653SPeter Holm 428a272653SPeter Holm/tmp/killpg 438a272653SPeter Holm 448a272653SPeter Holmrm -f /tmp/killpg 458a272653SPeter Holmexit 0 468a272653SPeter HolmEOF 478a272653SPeter Holm#include <sys/types.h> 488a272653SPeter Holm#include <sys/wait.h> 498a272653SPeter Holm 508a272653SPeter Holm#include <err.h> 518a272653SPeter Holm#include <errno.h> 528a272653SPeter Holm#include <fcntl.h> 538a272653SPeter Holm#include <pwd.h> 548a272653SPeter Holm#include <signal.h> 558a272653SPeter Holm#include <stdio.h> 568a272653SPeter Holm#include <stdlib.h> 578a272653SPeter Holm#include <unistd.h> 588a272653SPeter Holm 598a272653SPeter Holmstatic pid_t gid, pid; 608a272653SPeter Holm 618a272653SPeter Holm#define LOOPS 100 628a272653SPeter Holm 638a272653SPeter Holmstatic void 648a272653SPeter Holmhand(int i __unused) { /* handler */ 658a272653SPeter Holm _exit(0); 668a272653SPeter Holm} 678a272653SPeter Holm 688a272653SPeter Holmstatic void 698a272653SPeter Holmnlooper(void) 708a272653SPeter Holm{ 718a272653SPeter Holm int i; 728a272653SPeter Holm 738a272653SPeter Holm setproctitle("nlooper"); 748a272653SPeter Holm setpgrp(0, getpid()); 758a272653SPeter Holm for (i = 0; i < LOOPS; i++) { 768a272653SPeter Holm if ((pid = fork()) == 0) { 778a272653SPeter Holm signal(SIGINFO, hand); 788a272653SPeter Holm if (arc4random() % 100 < 10) 798a272653SPeter Holm usleep(arc4random() % 100); 808a272653SPeter Holm _exit(0); 818a272653SPeter Holm } 828a272653SPeter Holm wait(NULL); 838a272653SPeter Holm } 848a272653SPeter Holm _exit(0); 858a272653SPeter Holm} 868a272653SPeter Holm 878a272653SPeter Holmstatic void 888a272653SPeter Holmlooper(void) 898a272653SPeter Holm{ 908a272653SPeter Holm int i; 918a272653SPeter Holm 928a272653SPeter Holm setproctitle("looper"); 938a272653SPeter Holm setpgrp(0, getpid()); 948a272653SPeter Holm for (i = 0; i < LOOPS; i++) { 958a272653SPeter Holm if ((pid = fork()) == 0) { 968a272653SPeter Holm signal(SIGINFO, hand); 978a272653SPeter Holm if (arc4random() % 100 < 10) 988a272653SPeter Holm usleep(arc4random() % 100); 998a272653SPeter Holm _exit(0); 1008a272653SPeter Holm } 1018a272653SPeter Holm wait(NULL); 1028a272653SPeter Holm } 1038a272653SPeter Holm unlink("cont"); 1048a272653SPeter Holm _exit(0); 1058a272653SPeter Holm} 1068a272653SPeter Holm 1078a272653SPeter Holmstatic void 1088a272653SPeter Holmkiller(void) 1098a272653SPeter Holm{ 1108a272653SPeter Holm struct passwd *pw; 1118a272653SPeter Holm 1128a272653SPeter Holm setproctitle("killer"); 1138a272653SPeter Holm if ((pw = getpwnam("nobody")) == NULL) 1148a272653SPeter Holm err(1, "no such user: nobody"); 1158a272653SPeter Holm 1168a272653SPeter Holm if (setgroups(1, &pw->pw_gid) || 1178a272653SPeter Holm setegid(pw->pw_gid) || setgid(pw->pw_gid) || 1188a272653SPeter Holm seteuid(pw->pw_uid) || setuid(pw->pw_uid)) 1198a272653SPeter Holm err(1, "Can't drop privileges to \"nobody\""); 1208a272653SPeter Holm endpwent(); 1218a272653SPeter Holm 1228a272653SPeter Holm if ((gid = fork()) == 0) 1238a272653SPeter Holm nlooper(); /* nobody looper */ 1248a272653SPeter Holm 1258a272653SPeter Holm sleep(1); 1268a272653SPeter Holm while (access("cont", R_OK) == 0) { 1278a272653SPeter Holm if (killpg(gid, SIGINFO) == -1) { 1288a272653SPeter Holm if (errno == EPERM) 1298a272653SPeter Holm continue; 1308a272653SPeter Holm warn("FAIL killpg"); 1318a272653SPeter Holm } 1328a272653SPeter Holm } 1338a272653SPeter Holm _exit(0); 1348a272653SPeter Holm} 1358a272653SPeter Holm 1368a272653SPeter Holmint 1378a272653SPeter Holmmain(void) 1388a272653SPeter Holm{ 1398a272653SPeter Holm int fd; 1408a272653SPeter Holm 1418a272653SPeter Holm if ((fd = open("cont", O_RDWR | O_CREAT, 0666)) == -1) 1428a272653SPeter Holm err(1, "creat"); 1438a272653SPeter Holm close(fd); 1448a272653SPeter Holm signal(SIGINFO, SIG_IGN); 1458a272653SPeter Holm 1468a272653SPeter Holm if ((gid = fork()) == 0) 1478a272653SPeter Holm looper(); 1488a272653SPeter Holm if (fork() == 0) 1498a272653SPeter Holm killer(); 1508a272653SPeter Holm 1518a272653SPeter Holm wait(NULL); 1528a272653SPeter Holm wait(NULL); 1538a272653SPeter Holm 1548a272653SPeter Holm return (0); 1558a272653SPeter Holm} 156