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      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 
     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 
     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