152 lines
4.6 KiB
C
152 lines
4.6 KiB
C
/*
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* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Based on test by Dr. David Alan Gilbert <dave@treblig.org>
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*/
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#include "tests.h"
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#include "nsig.h"
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#include <assert.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/select.h>
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#include <asm/unistd.h>
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#include <sys/time.h>
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#ifdef __NR_pselect6
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static fd_set set[3][0x1000000 / sizeof(fd_set)];
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static void
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handler(int signo)
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{
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}
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int main(int ac, char **av)
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{
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int fds[2];
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struct {
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struct timespec ts;
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int pad[2];
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} tm_in = {
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.ts = { .tv_sec = 0xc0de1, .tv_nsec = 0xc0de2 },
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.pad = { 0xdeadbeef, 0xbadc0ded }
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}, tm = tm_in;
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sigset_t mask;
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const struct sigaction act = { .sa_handler = handler };
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const struct itimerval itv = { .it_value.tv_usec = 111111 };
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sigemptyset(&mask);
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sigaddset(&mask, SIGHUP);
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sigaddset(&mask, SIGCHLD);
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if (pipe(fds))
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perror_msg_and_fail("pipe");
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/*
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* Start with a nice simple pselect.
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*/
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FD_SET(fds[0], set[0]);
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FD_SET(fds[1], set[0]);
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FD_SET(fds[0], set[1]);
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FD_SET(fds[1], set[1]);
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FD_SET(1, set[2]);
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FD_SET(2, set[2]);
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int rc = pselect(fds[1] + 1, set[0], set[1], set[2], NULL, NULL);
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if (rc < 0)
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perror_msg_and_skip("pselect");
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assert(rc == 1);
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printf("pselect6(%d, [%d %d], [%d %d], [1 2], NULL, {NULL, %u}) "
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"= 1 (out [%d])\n",
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fds[1] + 1, fds[0], fds[1],
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fds[0], fds[1],
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NSIG_BYTES, fds[1]);
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/*
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* Another simple one, with a timeout.
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*/
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FD_SET(1, set[1]);
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FD_SET(2, set[1]);
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FD_SET(fds[0], set[1]);
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FD_SET(fds[1], set[1]);
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assert(syscall(__NR_pselect6, fds[1] + 1, NULL, set[1], NULL, &tm.ts, NULL) == 3);
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printf("pselect6(%d, NULL, [1 2 %d %d], NULL, "
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"{tv_sec=%lld, tv_nsec=%lld}, NULL) = 3 (out [1 2 %d], left "
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"{tv_sec=%lld, tv_nsec=%lld})\n",
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fds[1] + 1, fds[0], fds[1],
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(long long) tm_in.ts.tv_sec, (long long) tm_in.ts.tv_nsec,
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fds[1],
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(long long) tm.ts.tv_sec, (long long) tm.ts.tv_nsec);
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/*
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* Now the crash case that trinity found, negative nfds
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* but with a pointer to a large chunk of valid memory.
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*/
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FD_ZERO(set[0]);
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FD_SET(fds[1],set[0]);
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assert(pselect(-1, NULL, set[0], NULL, NULL, &mask) == -1);
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printf("pselect6(-1, NULL, %p, NULL, NULL, {[HUP CHLD], %u}) "
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"= -1 EINVAL (%m)\n", set[0], NSIG_BYTES);
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/*
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* Another variant, with nfds exceeding FD_SETSIZE limit.
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*/
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FD_ZERO(set[0]);
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FD_SET(fds[0],set[0]);
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FD_ZERO(set[1]);
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tm.ts.tv_sec = 0;
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tm.ts.tv_nsec = 123;
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assert(pselect(FD_SETSIZE + 1, set[0], set[1], NULL, &tm.ts, &mask) == 0);
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printf("pselect6(%d, [%d], [], NULL, {tv_sec=0, tv_nsec=123}, "
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"{[HUP CHLD], %u}) = 0 (Timeout)\n",
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FD_SETSIZE + 1, fds[0], NSIG_BYTES);
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/*
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* See how timeouts are decoded.
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*/
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assert(sigaction(SIGALRM, &act, NULL) == 0);
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assert(setitimer(ITIMER_REAL, &itv, NULL) == 0);
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tm.ts.tv_nsec = 222222222;
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assert(pselect(0, NULL, NULL, NULL, &tm.ts, &mask) == -1);
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printf("pselect6(0, NULL, NULL, NULL, {tv_sec=0, tv_nsec=222222222}, "
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"{[HUP CHLD], %u}) = "
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"? ERESTARTNOHAND (To be restarted if no handler)\n",
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NSIG_BYTES);
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puts("--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---");
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_pselect6")
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#endif
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