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 Test that sigtimedwait() sets errno to [EAGAIN] if no signal specified by
9 set was generated within the specified timeout period.
10
11 NOTE: This program has commented out areas. The commented out functionality
12 sets a timer in case sigtimedwait() never returns, to help the program
13 from hanging. To make this program
14 runnable on a typical system, I've commented out the timer functionality
15 by default. However, if you do have a timers implementation on your
16 system, then it is recommened that you uncomment the timers-related lines
17 of code in this program.
18
19 Steps:
20 1. Register signal TIMERSIGNAL with the handler myhandler
21 (2.)Create and set a timer that expires in TIMERSEC seconds incase sigtimedwait()
22 never returns.
23 3. Call sigtimedwait() to wait for non-pending signal SIGTOTEST for SIGTIMEDWAITSEC
24 seconds.
25 4. Verify that sigtimedwait() sets errno to [EAGAIN].
26 */
27
28 #define _XOPEN_REALTIME 1
29
30 #define TIMERSIGNAL SIGUSR1
31 #define SIGTOTEST SIGUSR2
32 #define TIMERSEC 2
33 #define SIGTIMEDWAITSEC 1
34
35 #include <errno.h>
36 #include <signal.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <time.h>
40 #include <unistd.h>
41 #include <sys/wait.h>
42 #include "posixtest.h"
43
myhandler(int signo)44 void myhandler(int signo)
45 {
46 printf
47 ("Test FAILED: %d seconds have elapsed and sigtimedwait() has not yet returned.\n",
48 TIMERSEC);
49 exit(PTS_FAIL);
50 }
51
main(void)52 int main(void)
53 {
54 struct sigaction act;
55
56 sigset_t selectset;
57 struct timespec ts;
58 /*
59 struct sigevent ev;
60 timer_t tid;
61 struct itimerspec its;
62
63 its.it_interval.tv_sec = 0;
64 its.it_interval.tv_nsec = 0;
65 its.it_value.tv_sec = TIMERSEC;
66 its.it_value.tv_nsec = 0;
67
68 ev.sigev_notify = SIGEV_SIGNAL;
69 ev.sigev_signo = TIMERSIGNAL;
70 */
71 act.sa_flags = 0;
72 act.sa_handler = myhandler;
73 sigemptyset(&act.sa_mask);
74 sigaction(TIMERSIGNAL, &act, 0);
75
76 sigemptyset(&selectset);
77 sigaddset(&selectset, SIGTOTEST);
78
79 ts.tv_sec = SIGTIMEDWAITSEC;
80 ts.tv_nsec = 0;
81 /*
82 if (timer_create(CLOCK_REALTIME, &ev, &tid) != 0) {
83 perror("timer_create() did not return success\n");
84 return PTS_UNRESOLVED;
85 }
86
87 if (timer_settime(tid, 0, &its, NULL) != 0) {
88 perror("timer_settime() did not return success\n");
89 return PTS_UNRESOLVED;
90 }
91 */
92 if (sigtimedwait(&selectset, NULL, &ts) != -1) {
93 printf("Test UNRESOLVED: sigtimedwait() did not return -1\n");
94 return PTS_UNRESOLVED;
95 }
96
97 if (errno != EAGAIN) {
98 printf("Test FAILED: sigtimedwait() did set errno to EAGAIN\n");
99 return PTS_FAIL;
100 }
101
102 printf("Test PASSED\n");
103 return PTS_PASS;
104 }
105