text: /*
   * 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);
  	puts("pselect6(0, NULL, NULL, NULL, {0, 222222222}, {[HUP CHLD], 8})"
  	     " = ? ERESTARTNOHAND (To be restarted if no handler)");
  	puts("--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---");
  
  	puts("+++ exited with 0 +++");
  	return 0;
  }
  
  #else
  
  SKIP_MAIN_UNDEFINED("__NR_pselect6")
  
  #endif
  