1d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes/* 2d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org> 3d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * All rights reserved. 4d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 5d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Redistribution and use in source and binary forms, with or without 6d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * modification, are permitted provided that the following conditions 7d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * are met: 8d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 1. Redistributions of source code must retain the above copyright 9d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer. 10d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 2. Redistributions in binary form must reproduce the above copyright 11d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer in the 12d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * documentation and/or other materials provided with the distribution. 13d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 3. The name of the author may not be used to endorse or promote products 14d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * derived from this software without specific prior written permission. 15d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 16d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes */ 27d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 28d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <assert.h> 29d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <stdlib.h> 30d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <unistd.h> 31d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <signal.h> 32d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 33d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesstatic void handle_signal(int no) 34d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes{ 35d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes _exit(128 + no); 36d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes} 37d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 38d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesint 39d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesmain(void) 40d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes{ 41d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes struct sigaction sa, sa0; 42d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 43d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sa.sa_handler = SIG_IGN; 44d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sigemptyset(&sa.sa_mask); 45d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sigaddset(&sa.sa_mask, SIGHUP); 46d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sigaddset(&sa.sa_mask, SIGINT); 47d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sa.sa_flags = SA_RESTART; 48d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes assert(!sigaction(SIGUSR2, &sa, &sa0)); 49d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 50d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sa.sa_handler = handle_signal; 51d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sigemptyset(&sa.sa_mask); 52d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sigaddset(&sa.sa_mask, SIGQUIT); 53d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sigaddset(&sa.sa_mask, SIGTERM); 54d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sa.sa_flags = SA_SIGINFO; 55d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes assert(!sigaction(SIGUSR2, &sa, &sa0)); 56d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 57d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sa.sa_handler = SIG_DFL; 58d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sigemptyset(&sa.sa_mask); 59d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sa.sa_flags = 0; 60d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes assert(!sigaction(SIGUSR2, &sa, &sa0)); 61d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 62d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sigfillset(&sa.sa_mask); 63d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sigdelset(&sa.sa_mask, SIGHUP); 64d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes assert(!sigaction(SIGUSR2, &sa, &sa0)); 65d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 66d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes return 0; 67d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes} 68