1 /* 2 * Copyright (c) 2002-2003, Intel Corporation. All rights reserved. 3 * Created by: salwan.searty REMOVE-THIS AT intel DOT com 4 * This file is licensed under the GPL license. For the full content 5 * of this license, see the COPYING file at the top level of this 6 * source tree. 7 8 This program tests the assertion that if the ss_flags member is set to something 9 other than SS_DISABLE, and the ss argument is something other than a null pointer, 10 then sigaltstack() shall return -1 and set errno to [EINVAL]. 11 12 Steps: 13 - Set up a dummy handler for signal SIGTOTEST and set the sa_flags member to SA_ONSTACK. 14 - Allocate memory for the alternate signal stack (altstack1) 15 - Set the ss_flags member of the alternate stack to something other than SS_DISABLE 16 - call sigaltstack() to define the alternate signal stack 17 - Verify that sigaltstack() returns -1 and sets errno to [EINVAL]. 18 */ 19 20 21 #include <signal.h> 22 #include <stdio.h> 23 #include <stdlib.h> 24 #include <errno.h> 25 #include "posixtest.h" 26 27 #define SIGTOTEST SIGUSR1 28 29 stack_t altstack1; 30 handler()31void handler() 32 { 33 printf("Just a dummy handler\n"); 34 } 35 main(void)36int main(void) 37 { 38 39 struct sigaction act; 40 act.sa_flags = SA_ONSTACK; 41 act.sa_handler = handler; 42 sigemptyset(&act.sa_mask); 43 44 if (sigaction(SIGTOTEST, &act, 0) == -1) { 45 perror 46 ("Unexpected error while attempting to setup test pre-conditions"); 47 return PTS_UNRESOLVED; 48 } 49 50 if ((altstack1.ss_sp = malloc(SIGSTKSZ)) == NULL) { 51 perror 52 ("Unexpected error while attempting to setup test pre-conditions"); 53 return PTS_UNRESOLVED; 54 } 55 56 altstack1.ss_flags = SS_DISABLE + 1; 57 altstack1.ss_size = SIGSTKSZ; 58 59 if (sigaltstack(&altstack1, NULL) != -1) { 60 printf("Test FAILED: Expected return value of -1.\n"); 61 return PTS_FAIL; 62 } 63 64 if (errno != EINVAL) { 65 printf("Test FAILED: Errno [EINVAL] was expected.\n"); 66 return PTS_FAIL; 67 } 68 69 printf("Test PASSED\n"); 70 return PTS_PASS; 71 } 72