1/******************************************************************************/ 2/* Copyright (c) Crackerjack Project., 2007 */ 3/* */ 4/* This program is free software; you can redistribute it and/or modify */ 5/* it under the terms of the GNU General Public License as published by */ 6/* the Free Software Foundation; either version 2 of the License, or */ 7/* (at your option) any later version. */ 8/* */ 9/* This program is distributed in the hope that it will be useful, */ 10/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 11/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */ 12/* the GNU General Public License for more details. */ 13/* */ 14/* You should have received a copy of the GNU General Public License */ 15/* along with this program; if not, write to the Free Software Foundation, */ 16/* Inc., 59 Temple Place, Suite TEST_SIG0, Boston, MA 02111-1307 USA */ 17/* */ 18/* History: Porting from Crackerjack to LTP is done by */ 19/* Manas Kumar Nayak <maknayak@in.ibm.com> */ 20/******************************************************************************/ 21 22/******************************************************************************/ 23/* Description: This tests the rt_sigprocmask() syscall */ 24/* rt_sigprocmask changes the list of currently blocked signals. */ 25/* The set value stores the signal mask of the pending signals. */ 26/* The previous action on the signal is saved in oact. The value */ 27/* of how indicates how the call should behave; its values are */ 28/* as follows: */ 29/* */ 30/* SIG_BLOCK */ 31/* The set of blocked signals is the union of the current set*/ 32/* and the set argument. */ 33/* SIG_UNBLOCK */ 34/* The signals in set are removed from the current set of */ 35/* blocked signals. It is okay to unblock a signal that is */ 36/* not blocked. */ 37/* SIG_SETMASK */ 38/* The set of blocked signals is set to the set argument. */ 39/* sigsetsize should indicate the size of a sigset_t type. */ 40/******************************************************************************/ 41 42#include <stdio.h> 43#include <signal.h> 44#include <errno.h> 45 46#include "test.h" 47#include "linux_syscall_numbers.h" 48#include "lapi/rt_sigaction.h" 49 50char *TCID = "rt_sigprocmask01"; 51static int testno; 52int TST_TOTAL = 8; 53 54static volatile sig_atomic_t sig_count; 55 56#define TEST_SIG SIGRTMIN+1 57 58static void cleanup(void) 59{ 60 tst_rmdir(); 61} 62 63static void setup(void) 64{ 65 TEST_PAUSE; 66 tst_tmpdir(); 67} 68 69void sig_handler(int sig) 70{ 71 sig_count++; 72} 73 74int main(int ac, char **av) 75{ 76 struct sigaction act, oact; 77 memset(&act, 0, sizeof(act)); 78 memset(&oact, 0, sizeof(oact)); 79 act.sa_handler = sig_handler; 80 81 sigset_t set, oset; 82 int lc; 83 84 tst_parse_opts(ac, av, NULL, NULL); 85 86 setup(); 87 88 for (lc = 0; TEST_LOOPING(lc); ++lc) { 89 tst_count = 0; 90 for (testno = 0; testno < TST_TOTAL; ++testno) { 91 92 if (sigemptyset(&set) < 0) 93 tst_brkm(TFAIL | TERRNO, cleanup, 94 "sigemptyset call failed"); 95 96 if (sigaddset(&set, TEST_SIG) < 0) 97 tst_brkm(TFAIL | TERRNO, cleanup, 98 "sigaddset call failed"); 99 100 /* call rt_sigaction() */ 101 TEST(ltp_rt_sigaction(TEST_SIG, &act, &oact, 102 SIGSETSIZE)); 103 if (TEST_RETURN < 0) 104 tst_brkm(TFAIL | TTERRNO, cleanup, 105 "rt_sigaction call failed"); 106 107 /* call rt_sigprocmask() to block signal#TEST_SIG */ 108 TEST(ltp_syscall(__NR_rt_sigprocmask, SIG_BLOCK, &set, 109 &oset, SIGSETSIZE)); 110 if (TEST_RETURN == -1) 111 tst_brkm(TFAIL | TTERRNO, cleanup, 112 "rt_sigprocmask call failed"); 113 114 /* Make sure that the masked process is indeed 115 * masked. */ 116 if (kill(getpid(), TEST_SIG) < 0) 117 tst_brkm(TFAIL | TERRNO, cleanup, 118 "call to kill() failed"); 119 120 if (sig_count) { 121 tst_brkm(TFAIL | TERRNO, cleanup, 122 "rt_sigprocmask() failed to change " 123 "the process's signal mask"); 124 } else { 125 /* call rt_sigpending() */ 126 TEST(ltp_syscall(__NR_rt_sigpending, &oset, 127 SIGSETSIZE)); 128 if (TEST_RETURN == -1) 129 tst_brkm(TFAIL | TTERRNO, cleanup, 130 "rt_sigpending call failed"); 131 132 TEST(sigismember(&oset, TEST_SIG)); 133 if (TEST_RETURN == 0) 134 tst_brkm(TFAIL | TTERRNO, 135 cleanup, 136 "sigismember call failed"); 137 138 /* call rt_sigprocmask() to unblock 139 * signal#TEST_SIG */ 140 TEST(ltp_syscall(__NR_rt_sigprocmask, 141 SIG_UNBLOCK, &set, &oset, 142 SIGSETSIZE)); 143 if (TEST_RETURN == -1) 144 tst_brkm(TFAIL | TTERRNO, 145 cleanup, 146 "rt_sigprocmask call failed"); 147 148 if (sig_count) { 149 tst_resm(TPASS, 150 "rt_sigprocmask " 151 "functionality passed"); 152 break; 153 } else { 154 tst_brkm(TFAIL | TERRNO, 155 cleanup, 156 "rt_sigprocmask " 157 "functionality failed"); 158 } 159 } 160 161 } 162 163 tst_count++; 164 165 } 166 167 cleanup(); 168 tst_exit(); 169} 170