minix/tests/lib/libc/sys/t_select.c

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/* $NetBSD: t_select.c,v 1.3 2012/03/18 07:00:52 jruoho Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundatiom
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <assert.h>
#include <sys/types.h>
#include <sys/select.h>
#include <sys/wait.h>
#include <err.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <atf-c.h>
static sig_atomic_t keep_going = 1;
static void
sig_handler(int signum)
{
keep_going = 0;
}
static void
sigchld(int signum)
{
}
static char
xtoa(uint8_t n)
{
static const char xarray[] = "0123456789abcdef";
assert(n < sizeof(xarray));
return xarray[n];
}
static const char *
prmask(const sigset_t *m, char *buf, size_t len)
{
size_t j = 2;
assert(len >= 3 + sizeof(*m));
buf[0] = '0';
buf[1] = 'x';
#define N(p, a) (((p) >> ((a) * 4)) & 0xf)
for (size_t i = __arraycount(m->__bits); i > 0; i--) {
uint32_t p = m->__bits[i - 1];
for (size_t k = sizeof(p); k > 0; k--)
buf[j++] = xtoa(N(p, k - 1));
}
buf[j] = '\0';
return buf;
}
static void
child(const struct timespec *ts)
{
struct sigaction sa;
sigset_t set, oset, nset;
char obuf[sizeof(oset) + 3], nbuf[sizeof(nset) + 3];
int fd;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = sig_handler;
if ((fd = open("/dev/null", O_RDONLY)) == -1)
err(1, "open");
if (sigaction(SIGTERM, &sa, NULL) == -1)
err(1, "sigaction");
sigfillset(&set);
if (sigprocmask(SIG_BLOCK, &set, NULL) == -1)
err(1, "sigprocmask");
if (sigprocmask(SIG_BLOCK, NULL, &oset) == -1)
err(1, "sigprocmask");
sigemptyset(&set);
for (;;) {
fd_set rset;
FD_ZERO(&rset);
FD_SET(fd, &rset);
if (pselect(1, &rset, NULL, NULL, ts, &set) == -1) {
if(errno == EINTR) {
if (!keep_going)
break;
}
}
if (ts)
break;
}
if (sigprocmask(SIG_BLOCK, NULL, &nset) == -1)
err(1, "sigprocmask");
if (memcmp(&oset, &nset, sizeof(oset)) != 0)
atf_tc_fail("pselect() masks don't match "
"after timeout %s != %s",
prmask(&nset, nbuf, sizeof(nbuf)),
prmask(&oset, obuf, sizeof(obuf)));
}
ATF_TC(pselect_sigmask);
ATF_TC_HEAD(pselect_sigmask, tc)
{
atf_tc_set_md_var(tc, "descr", "Checks pselect's temporary mask "
"setting when a signal is received (PR lib/43625)");
}
ATF_TC_BODY(pselect_sigmask, tc)
{
pid_t pid;
int status;
signal(SIGCHLD, sigchld);
switch (pid = fork()) {
case 0:
child(NULL);
case -1:
err(1, "fork");
default:
sleep(1);
if (kill(pid, SIGTERM) == -1)
err(1, "kill");
sleep(1);
switch (waitpid(pid, &status, WNOHANG)) {
case -1:
err(1, "wait");
case 0:
if (kill(pid, SIGKILL) == -1)
err(1, "kill");
atf_tc_fail("pselect() did not receive signal");
break;
default:
break;
}
}
}
ATF_TC(pselect_timeout);
ATF_TC_HEAD(pselect_timeout, tc)
{
atf_tc_set_md_var(tc, "descr", "Checks pselect's temporary mask "
"setting when a timeout occurs");
}
ATF_TC_BODY(pselect_timeout, tc)
{
pid_t pid;
int status;
static const struct timespec zero = { 0, 0 };
signal(SIGCHLD, sigchld);
switch (pid = fork()) {
case 0:
child(&zero);
break;
case -1:
err(1, "fork");
default:
sleep(1);
switch (waitpid(pid, &status, WNOHANG)) {
case -1:
err(1, "wait");
case 0:
if (kill(pid, SIGKILL) == -1)
err(1, "kill");
atf_tc_fail("pselect() did not receive signal");
break;
default:
break;
}
}
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, pselect_sigmask);
ATF_TP_ADD_TC(tp, pselect_timeout);
return atf_no_error();
}