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