1 /*
2 * Copyright (c) 2005, Bull S.A.. All rights reserved.
3 * Created by: Sebastien Decugis
4 * Copyright (c) 2013 Cyril Hrubis <chrubis@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of version 2 of the GNU General Public License as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it would be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * This sample test aims to check the following assertions:
19 *
20 * If SA_SIGINFO is set in sa_flags and Real Time Signals extension is supported,
21 * sa_sigaction is used as the signal handling function.
22 *
23 * The steps are:
24 * -> test for RTS extension
25 * -> register a handler for SIGTTOU with SA_SIGINFO, and a known function
26 * as sa_sigaction
27 * -> raise SIGTTOU, and check the function has been called.
28 *
29 * The test fails if the function is not called
30 */
31
32
33 #include <pthread.h>
34 #include <stdarg.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39 #include <signal.h>
40 #include <errno.h>
41 #include "posixtest.h"
42
43 #define WRITE(str) write(STDOUT_FILENO, str, sizeof(str) - 1)
44
45 static volatile sig_atomic_t called = 0;
46
handler(int sig,siginfo_t * info,void * context)47 static void handler(int sig, siginfo_t *info, void *context)
48 {
49 (void) sig;
50 (void) context;
51
52 if (info->si_signo != SIGTTOU) {
53 WRITE("Wrong signal generated?\n");
54 _exit(PTS_FAIL);
55 }
56
57 called = 1;
58 }
59
main(void)60 int main(void)
61 {
62 int ret;
63 long rts;
64
65 struct sigaction sa;
66
67 /* Test the RTS extension */
68 rts = sysconf(_SC_REALTIME_SIGNALS);
69
70 if (rts < 0L) {
71 fprintf(stderr, "This test needs the RTS extension");
72 return PTS_UNTESTED;
73 }
74
75 /* Set the signal handler */
76 sa.sa_flags = SA_SIGINFO;
77 sa.sa_sigaction = handler;
78
79 ret = sigemptyset(&sa.sa_mask);
80
81 if (ret != 0) {
82 perror("Failed to empty signal set");
83 return PTS_UNRESOLVED;
84 }
85
86 /* Install the signal handler for SIGTTOU */
87 ret = sigaction(SIGTTOU, &sa, 0);
88
89 if (ret != 0) {
90 perror("Failed to set signal handler");
91 return PTS_UNTESTED;
92 }
93
94 if (called) {
95 fprintf(stderr,
96 "The signal handler has been called before signal was raised");
97 return PTS_FAIL;
98 }
99
100 ret = raise(SIGTTOU);
101
102 if (ret != 0) {
103 perror("Failed to raise SIGTTOU");
104 return PTS_UNRESOLVED;
105 }
106
107 if (!called) {
108 fprintf(stderr, "The sa_handler was not called");
109 return PTS_FAIL;
110 }
111
112 printf("Test PASSED\n");
113
114 return PTS_PASS;
115 }
116