1 /* 2 * 3 * Copyright (c) International Business Machines Corp., 2001 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /* 21 * NAME 22 * sigaction02.c 23 * 24 * DESCRIPTION 25 * Testcase to check the basic errnos set by the sigaction(2) syscall. 26 * 27 * ALGORITHM 28 * 1. Pass an invalid signal as the "sig" parameter, and expect EINVAL. 29 * 2. Attempt to catch the SIGKILL, and expect EINVAL. 30 * 3. Attempt to catch the SIGSTOP, and expect EINVAL. 31 * 4. Pass an invalid address as the "act" parameter, expect an EFAULT. 32 * 5. Pass an invalid address as the "oact" parameter, and expect EFAULT. 33 * 34 * USAGE 35 * sigaction02 36 * 37 * HISTORY 38 * 07/2001 Ported by Wayne Boyer 39 * 40 * RESTRICTIONS 41 * Tests #4 and #5 will fail as long as the glibc implementation 42 * of sigaction() is not fixed. The glibc wrapper around of sigaction() 43 * doesn't handle the invalid addresses of the "act" and "oact" parameters 44 * correctly. If an invalid address is passed, glibc dumps core. 45 * Temporarily, tests 4 and 5 are put inside "#ifdef GLIBC_SIGACTION_BUG" 46 * in order to skip these tests. This should be removed from the Makefile 47 * and this program when the glibc bug gets fixed. 48 * 49 * This test doesn't follow the correct LTP format - PLEASE FIX! 50 */ 51 #define DEBUG 0 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <unistd.h> 55 #include <signal.h> 56 #include <errno.h> 57 #include "test.h" 58 59 #define SIGBAD 9999 60 61 void setup(); 62 void cleanup(); 63 64 char *TCID = "sigaction02"; 65 int TST_TOTAL = 1; 66 67 volatile sig_atomic_t testcase_no; 68 69 /* 70 * handler() 71 * A dummy signal handler for attempting to catch signals. 72 */ 73 void handler(int sig) 74 { 75 if (DEBUG) 76 tst_resm(TINFO, "Inside signal handler. Got signal: %d", sig); 77 return; 78 } 79 80 /* 81 * set_handler() 82 * Establish a signal handler for "sig" with the specified flags and 83 * signal to mask while the handler executes. 84 * Returns 85 * 0 on success, errno on failure 86 */ 87 int set_handler(int sig, int sig_to_mask, int flag) 88 { 89 struct sigaction sa; 90 int err; 91 92 if (flag == 0) { 93 sa.sa_sigaction = (void *)handler; 94 sa.sa_flags = SA_NOMASK; 95 sigemptyset(&sa.sa_mask); 96 sigaddset(&sa.sa_mask, sig_to_mask); 97 err = sigaction(sig, &sa, NULL); 98 } else if (flag == 1) { 99 err = sigaction(sig, (void *)-1, NULL); 100 } else if (flag == 2) { 101 err = sigaction(sig, NULL, (void *)-1); 102 } else 103 err = -1; 104 105 if (err == 0) 106 return 0; 107 else 108 return errno; 109 } 110 111 int main(int ac, char **av) 112 { 113 int ret; 114 115 tst_parse_opts(ac, av, NULL, NULL); 116 //test1: 117 testcase_no = 1; 118 119 if (DEBUG) 120 tst_resm(TINFO, "Enter test %d: set handler for SIGKILL", 121 testcase_no); 122 if ((ret = set_handler(SIGKILL, 0, 0)) == 0) { 123 tst_resm(TFAIL, "sigaction() succeeded, should have failed"); 124 } 125 if (ret != EINVAL) { 126 tst_resm(TFAIL, "sigaction set incorrect errno. Expected " 127 "EINVAL, got: %d", ret); 128 } else { 129 tst_resm(TPASS, "call failed with expected EINVAL error"); 130 } 131 132 //test2: 133 testcase_no++; 134 135 if (DEBUG) 136 tst_resm(TINFO, "Enter test %d: set handler for SIGSTOP", 137 testcase_no); 138 if ((ret = set_handler(SIGSTOP, 0, 0)) == 0) { 139 tst_resm(TFAIL, "sigaction() succeeded, should have failed"); 140 } 141 if (ret != EINVAL) { 142 tst_resm(TFAIL, "sigaction set incorrect errno. Expected " 143 "EINVAL, got: %d", ret); 144 } else { 145 tst_resm(TPASS, "call failed with expected EINVAL error"); 146 } 147 148 //test3: 149 testcase_no++; 150 if (DEBUG) 151 tst_resm(TINFO, "Enter test %d: set handler for bad " 152 "signal number", testcase_no); 153 if ((ret = set_handler(SIGBAD, 0, 0)) == 0) { 154 tst_resm(TFAIL, "sigaction() succeeded, should have failed"); 155 } 156 if (ret != EINVAL) { 157 tst_resm(TFAIL, "sigaction set incorrect errno. Expected " 158 "EINVAL, got: %d", ret); 159 } else { 160 tst_resm(TPASS, "call failed with expected EINVAL error"); 161 } 162 163 #ifndef GLIBC_SIGACTION_BUG 164 165 //test4: 166 testcase_no++; 167 if (DEBUG) 168 tst_resm(TINFO, "Enter test %d: set handler with " 169 "bad \"act\" param", testcase_no); 170 if ((ret = set_handler(SIGUSR1, 0, 1)) == 0) { 171 tst_resm(TFAIL, "sigaction() succeeded, should have failed"); 172 } 173 if (ret != EFAULT) { 174 tst_resm(TFAIL, "sigaction set incorrect errno. Expected " 175 "EFAULT, got: %d", ret); 176 } else { 177 tst_resm(TPASS, "call failed with expected EFAULT error"); 178 } 179 180 //test5: 181 testcase_no++; 182 if (DEBUG) 183 tst_resm(TINFO, "Enter test %d: set handler with " 184 "bad \"oact\" param", testcase_no); 185 if ((ret = set_handler(SIGUSR1, 0, 2)) == 0) { 186 tst_resm(TFAIL, "sigaction() succeeded, should have failed"); 187 } 188 if (ret != EFAULT) { 189 tst_resm(TFAIL, "sigaction set incorrect errno. Expected " 190 "EFAULT, got: %d", ret); 191 } else { 192 tst_resm(TPASS, "call failed with expected EFAULT error"); 193 } 194 #endif /* GLIBC_SIGACTION_BUG */ 195 196 tst_exit(); 197 198 } 199
