blob: 49258a9ca646ecb9f1fa37c8b5ab1c66bbaac1dc [file] [log] [blame]
/*
* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
* All rights reserved.
*
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Based on test by Dr. David Alan Gilbert <dave@treblig.org>
*/
#include "tests.h"
#include <assert.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/syscall.h>
#include <sys/time.h>
#ifdef __NR_pselect6
#ifndef NSIG
# warning NSIG is not defined, using 32
# define NSIG 32
#endif
static fd_set set[3][0x1000000 / sizeof(fd_set)];
static void
handler(int signo)
{
}
int main(int ac, char **av)
{
int fds[2];
struct {
struct timespec ts;
int pad[2];
} tm_in = {
.ts = { .tv_sec = 0xc0de1, .tv_nsec = 0xc0de2 },
.pad = { 0xdeadbeef, 0xbadc0ded }
}, tm = tm_in;
sigset_t mask;
const struct sigaction act = { .sa_handler = handler };
const struct itimerval itv = { .it_value.tv_usec = 111111 };
sigemptyset(&mask);
sigaddset(&mask, SIGHUP);
sigaddset(&mask, SIGCHLD);
if (pipe(fds))
perror_msg_and_fail("pipe");
/*
* Start with a nice simple pselect.
*/
FD_SET(fds[0], set[0]);
FD_SET(fds[1], set[0]);
FD_SET(fds[0], set[1]);
FD_SET(fds[1], set[1]);
FD_SET(1, set[2]);
FD_SET(2, set[2]);
int rc = pselect(fds[1] + 1, set[0], set[1], set[2], NULL, NULL);
if (rc < 0)
perror_msg_and_skip("pselect");
assert(rc == 1);
printf("pselect6(%d, [%d %d], [%d %d], [1 2], NULL, {NULL, %u}) "
"= 1 (out [%d])\n",
fds[1] + 1, fds[0], fds[1],
fds[0], fds[1],
NSIG / 8, fds[1]);
/*
* Another simple one, with a timeout.
*/
FD_SET(1, set[1]);
FD_SET(2, set[1]);
FD_SET(fds[0], set[1]);
FD_SET(fds[1], set[1]);
assert(syscall(__NR_pselect6, fds[1] + 1, NULL, set[1], NULL, &tm.ts, NULL) == 3);
printf("pselect6(%d, NULL, [1 2 %d %d], NULL, {%lld, %lld}, NULL)"
" = 3 (out [1 2 %d], left {%lld, %lld})\n",
fds[1] + 1, fds[0], fds[1],
(long long) tm_in.ts.tv_sec, (long long) tm_in.ts.tv_nsec,
fds[1],
(long long) tm.ts.tv_sec, (long long) tm.ts.tv_nsec);
/*
* Now the crash case that trinity found, negative nfds
* but with a pointer to a large chunk of valid memory.
*/
FD_ZERO(set[0]);
FD_SET(fds[1],set[0]);
assert(pselect(-1, NULL, set[0], NULL, NULL, &mask) == -1);
printf("pselect6(-1, NULL, %p, NULL, NULL, {[HUP CHLD], %u}) "
"= -1 EINVAL (%m)\n", set[0], NSIG / 8);
/*
* Another variant, with nfds exceeding FD_SETSIZE limit.
*/
FD_ZERO(set[0]);
FD_SET(fds[0],set[0]);
FD_ZERO(set[1]);
tm.ts.tv_sec = 0;
tm.ts.tv_nsec = 123;
assert(pselect(FD_SETSIZE + 1, set[0], set[1], NULL, &tm.ts, &mask) == 0);
printf("pselect6(%d, [%d], [], NULL, {0, 123}, {[HUP CHLD], %u}) "
"= 0 (Timeout)\n", FD_SETSIZE + 1, fds[0], NSIG / 8);
/*
* See how timeouts are decoded.
*/
assert(sigaction(SIGALRM, &act, NULL) == 0);
assert(setitimer(ITIMER_REAL, &itv, NULL) == 0);
tm.ts.tv_nsec = 222222222;
assert(pselect(0, NULL, NULL, NULL, &tm.ts, &mask) == -1);
printf("pselect6(0, NULL, NULL, NULL, {0, 222222222}, {[HUP CHLD], %u})"
" = ? ERESTARTNOHAND (To be restarted if no handler)\n",
NSIG / 8);
puts("--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---");
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_pselect6")
#endif