1 /*
2 * Copyright (c) 2002-2003, Intel Corporation. All rights reserved.
3 * Created by: rusty.lynch 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 Test case for assertion #25 of the sigaction system call that verifies
9 that when the sa_sigaction signal-catching function is entered, then
10 the signal that was caught is added to the signal mask by raising that
11 signal in the signal handler and verifying that the handler is not
12 reentered.
13
14 Steps:
15 1. Fork a new process
16 2. (parent) wait for child
17 3. (child) Setup a signal handler for SIGPROF
18 4. (child) raise SIGPROF
19 5. (child, signal handler) increment handler count
20 6. (child, signal handler) if count is 1 then raise SIGPROF
21 7. (child, signal handler) if count is 2 then set error variable
22 8. (child) if error is set then return -1, else return 0
23 6. (parent - returning from wait) If child returned 0 then exit 0,
24 otherwise exit -1.
25 */
26
27 #include <signal.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <sys/wait.h>
31 #include <unistd.h>
32 #include "posixtest.h"
33
34 static int handler_count = 0;
35 static int handler_error = 0;
36
handler(int signo PTS_ATTRIBUTE_UNUSED)37 static void handler(int signo PTS_ATTRIBUTE_UNUSED)
38 {
39 static int inside_handler = 0;
40
41 printf("SIGPROF caught\n");
42 if (inside_handler) {
43 printf("Signal caught while inside handler\n");
44 handler_error++;
45 exit(-1);
46 }
47
48 inside_handler++;
49 handler_count++;
50
51 if (handler_count == 1) {
52 printf("Raising SIGPROF\n");
53 raise(SIGPROF);
54 printf("Returning from raising SIGPROF\n");
55 }
56
57 inside_handler--;
58 }
59
main(void)60 int main(void)
61 {
62 if (fork() == 0) {
63 /* child */
64
65 struct sigaction act;
66
67 act.sa_handler = handler;
68 act.sa_flags = 0;
69 sigemptyset(&act.sa_mask);
70 if (sigaction(SIGPROF, &act, 0) == -1) {
71 perror("Unexpected error while attempting to "
72 "setup test pre-conditions");
73 return PTS_UNRESOLVED;
74 }
75
76 if (raise(SIGPROF) == -1) {
77 perror("Unexpected error while attempting to "
78 "setup test pre-conditions");
79 return PTS_UNRESOLVED;
80 }
81
82 if (handler_error)
83 return PTS_UNRESOLVED;
84
85 return PTS_PASS;
86 } else {
87 int s;
88
89 /* parent */
90 if (wait(&s) == -1) {
91 perror("Unexpected error while setting up test "
92 "pre-conditions");
93 return PTS_UNRESOLVED;
94 }
95
96 if (!WEXITSTATUS(s)) {
97 printf("Test PASSED\n");
98 return PTS_PASS;
99 }
100 }
101
102 printf("Test FAILED\n");
103 return PTS_FAIL;
104 }
105