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/*
* Copyright (c) 2002-2003, Intel Corporation. All rights reserved.
* Created by: rusty.lynch REMOVE-THIS AT intel DOT com
* This file is licensed under the GPL license. For the full content
* of this license, see the COPYING file at the top level of this
* source tree.
Test assertion #17 by verifying that select returns -1 with
errno set to EINTR if a handler for the SIGPIPE signal is setup with
the SA_RESTART flag cleared.
* 12/18/02 - Adding in include of sys/time.h per
* rodrigc REMOVE-THIS AT attbi DOT com input that it needs
* to be included whenever the timeval struct is used.
*/
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/select.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include "posixtest.h"
static volatile sig_atomic_t wakeup = 1;
static void handler(int signo PTS_ATTRIBUTE_UNUSED)
{
printf("Caught SIGPIPE\n");
wakeup++;
}
int main(void)
{
pid_t pid;
struct timeval tv;
if ((pid = fork()) == 0) {
/* child */
struct sigaction act;
act.sa_handler = handler;
act.sa_flags = 0;
sigemptyset(&act.sa_mask);
sigaction(SIGPIPE, &act, 0);
while (wakeup == 1) {
tv.tv_sec = 3;
tv.tv_usec = 0;
if (select(0, NULL, NULL, NULL, &tv) == -1 &&
errno == EINTR) {
perror("select");
return PTS_PASS;
}
}
return PTS_FAIL;
} else {
/* parent */
int s;
/*
There is a race condition between the parent
process sending the SIGPIPE signal, and the
child process being inside the 'select' function
call.
I could not find a pure POSIX method for determining
the state of the child process, so I just added a delay
so that the test is valid in most conditions. (The
problem is that it would be perfectly legal for a
POSIX conformant OS to not schedule the child process
for a long time.)
*/
tv.tv_sec = 1;
tv.tv_usec = 0;
select(0, NULL, NULL, NULL, &tv);
kill(pid, SIGPIPE);
waitpid(pid, &s, 0);
if (WEXITSTATUS(s) == PTS_PASS) {
printf("Test PASSED\n");
return PTS_PASS;
}
}
printf("Test FAILED\n");
return PTS_FAIL;
}
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