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_SOURCE 600
29 #define _XOPEN_REALTIME 1
30
31 #define TIMERSIGNAL SIGUSR1
32 #define SIGTOTEST SIGUSR2
33 #define TIMERSEC 2
34 #define SIGTIMEDWAITSEC 1
35
36 #include <errno.h>
37 #include <signal.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <time.h>
41 #include <unistd.h>
42 #include <sys/wait.h>
43 #include "posixtest.h"
44
myhandler(int signo)45 void myhandler(int signo)
46 {
47 printf
48 ("Test FAILED: %d seconds have elapsed and sigtimedwait() has not yet returned.\n",
49 TIMERSEC);
50 exit(PTS_FAIL);
51 }
52
main(void)53 int main(void)
54 {
55 struct sigaction act;
56
57 sigset_t selectset;
58 struct timespec ts;
59 /*
60 struct sigevent ev;
61 timer_t tid;
62 struct itimerspec its;
63
64 its.it_interval.tv_sec = 0;
65 its.it_interval.tv_nsec = 0;
66 its.it_value.tv_sec = TIMERSEC;
67 its.it_value.tv_nsec = 0;
68
69 ev.sigev_notify = SIGEV_SIGNAL;
70 ev.sigev_signo = TIMERSIGNAL;
71 */
72 act.sa_flags = 0;
73 act.sa_handler = myhandler;
74 sigemptyset(&act.sa_mask);
75 sigaction(TIMERSIGNAL, &act, 0);
76
77 sigemptyset(&selectset);
78 sigaddset(&selectset, SIGTOTEST);
79
80 ts.tv_sec = SIGTIMEDWAITSEC;
81 ts.tv_nsec = 0;
82 /*
83 if (timer_create(CLOCK_REALTIME, &ev, &tid) != 0) {
84 perror("timer_create() did not return success\n");
85 return PTS_UNRESOLVED;
86 }
87
88 if (timer_settime(tid, 0, &its, NULL) != 0) {
89 perror("timer_settime() did not return success\n");
90 return PTS_UNRESOLVED;
91 }
92 */
93 if (sigtimedwait(&selectset, NULL, &ts) != -1) {
94 printf("Test UNRESOLVED: sigtimedwait() did not return -1\n");
95 return PTS_UNRESOLVED;
96 }
97
98 if (errno != EAGAIN) {
99 printf("Test FAILED: sigtimedwait() did set errno to EAGAIN\n");
100 return PTS_FAIL;
101 }
102
103 printf("Test PASSED\n");
104 return PTS_PASS;
105 }
106