1/*
2
3 * Copyright (c) 2002-2003, Intel Corporation. All rights reserved.
4 * Created by:  rusty.lynch REMOVE-THIS AT intel DOT com
5 * This file is licensed under the GPL license.  For the full content
6 * of this license, see the COPYING file at the top level of this
7 * source tree.
8
9  Test case for assertion #12 of the sigaction system call that verifies
10  signal-catching functions are executed on the alternate stack if the
11  SA_ONSTACK flag is set in the sigaction.sa_flags parameter to the
12  sigaction function call, and an alternate stack has been setup with
13  sigaltstack().
14
15  NOTE: This test case does not attempt to verify the proper operation
16        of sigaltstack.
17*/
18
19#define _XOPEN_SOURCE 600
20
21#include <signal.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include "posixtest.h"
25
26stack_t alt_ss;
27
28void handler(int signo)
29{
30	stack_t ss;
31
32	printf("Caught SIGCHLD\n");
33
34	if (sigaltstack(NULL, &ss) == -1) {
35		perror("Unexpected error while attempting to setup test "
36		       "pre-conditions");
37		exit(-1);
38	}
39
40	if (ss.ss_sp != alt_ss.ss_sp || ss.ss_size != alt_ss.ss_size) {
41		printf("Test FAILED\n");
42		exit(-1);
43	}
44}
45
46int main(void)
47{
48	struct sigaction act;
49
50	act.sa_handler = handler;
51	act.sa_flags = SA_ONSTACK;
52	sigemptyset(&act.sa_mask);
53	if (sigaction(SIGCHLD, &act, 0) == -1) {
54		perror("Unexpected error while attempting to setup test "
55		       "pre-conditions");
56		return PTS_UNRESOLVED;
57	}
58
59	if ((alt_ss.ss_sp = malloc(SIGSTKSZ)) == NULL) {
60		perror("Unexpected error while attempting to setup test "
61		       "pre-conditions");
62		return PTS_UNRESOLVED;
63	}
64	alt_ss.ss_size = SIGSTKSZ;
65	alt_ss.ss_flags = 0;
66
67	if (sigaltstack(&alt_ss, NULL) == -1) {
68		perror("Unexpected error while attempting to setup test "
69		       "pre-conditions");
70		return PTS_UNRESOLVED;
71	}
72
73	if (raise(SIGCHLD) == -1) {
74		perror("Unexpected error while attempting to setup test "
75		       "pre-conditions");
76		return PTS_UNRESOLVED;
77	}
78
79	printf("Test PASSED\n");
80	return PTS_PASS;
81}
82