diff options
Diffstat (limited to 'contrib/netbsd-tests/lib/libc/sys/t_pipe.c')
| -rw-r--r-- | contrib/netbsd-tests/lib/libc/sys/t_pipe.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/lib/libc/sys/t_pipe.c b/contrib/netbsd-tests/lib/libc/sys/t_pipe.c new file mode 100644 index 0000000..b30b94d --- /dev/null +++ b/contrib/netbsd-tests/lib/libc/sys/t_pipe.c @@ -0,0 +1,163 @@ +/* $NetBSD: t_pipe.c,v 1.3 2011/10/31 15:41:31 christos Exp $ */ + +/*- + * Copyright (c) 2001, 2008 The NetBSD Foundation, Inc. + * 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. + * + * 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 <sys/cdefs.h> +__COPYRIGHT("@(#) Copyright (c) 2008\ + The NetBSD Foundation, inc. All rights reserved."); +__RCSID("$NetBSD: t_pipe.c,v 1.3 2011/10/31 15:41:31 christos Exp $"); + +#include <sys/types.h> +#include <sys/wait.h> + +#include <errno.h> +#include <fcntl.h> +#include <poll.h> +#include <sched.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include <atf-c.h> + +#include "../../../h_macros.h" + +static pid_t pid; +static int nsiginfo = 0; + +/* + * This is used for both parent and child. Handle parent's SIGALRM, + * the childs SIGINFO doesn't need anything. + */ +static void +sighand(int sig) +{ + if (sig == SIGALRM) { + kill(pid, SIGINFO); + } + if (sig == SIGINFO) { + nsiginfo++; + } +} + +ATF_TC(pipe_restart); +ATF_TC_HEAD(pipe_restart, tc) +{ + atf_tc_set_md_var(tc, "descr", "Checks that writing to pipe " + "works correctly after being interrupted and restarted " + "(kern/14087)"); +} + +ATF_TC_BODY(pipe_restart, tc) +{ + int pp[2], st; + ssize_t sz, todo, done; + char *f; + sigset_t asigset, osigset, emptysigset; + + /* Initialise signal masks */ + RL(sigemptyset(&emptysigset)); + RL(sigemptyset(&asigset)); + RL(sigaddset(&asigset, SIGINFO)); + + /* Register signal handlers for both read and writer */ + REQUIRE_LIBC(signal(SIGINFO, sighand), SIG_ERR); + REQUIRE_LIBC(signal(SIGALRM, sighand), SIG_ERR); + + todo = 2 * 1024 * 1024; + REQUIRE_LIBC(f = malloc(todo), NULL); + + RL(pipe(pp)); + + RL(pid = fork()); + if (pid == 0) { + /* child */ + RL(close(pp[1])); + + /* Do inital write. This should succeed, make + * the other side do partial write and wait for us to pick + * rest up. + */ + RL(done = read(pp[0], f, 128 * 1024)); + + /* Wait until parent is alarmed and awakens us */ + RL(sigprocmask(SIG_BLOCK, &asigset, &osigset)); + while (nsiginfo == 0) { + if (sigsuspend(&emptysigset) != -1 || errno != EINTR) + atf_tc_fail("sigsuspend(&emptysigset): %s", + strerror(errno)); + } + RL(sigprocmask(SIG_SETMASK, &osigset, NULL)); + + /* Read all what parent wants to give us */ + while((sz = read(pp[0], f, 1024 * 1024)) > 0) + done += sz; + + /* + * Exit with 1 if number of bytes read doesn't match + * number of expected bytes + */ + printf("Read: %#zx\n", (size_t)done); + printf("Expected: %#zx\n", (size_t)todo); + + exit(done != todo); + + /* NOTREACHED */ + } else { + RL(close(pp[0])); + + /* + * Arrange for alarm after two seconds. Since we have + * handler setup for SIGARLM, the write(2) call should + * be restarted internally by kernel. + */ + (void)alarm(2); + + /* We write exactly 'todo' bytes. The very first write(2) + * should partially succeed, block and eventually + * be restarted by kernel + */ + while(todo > 0 && ((sz = write(pp[1], f, todo)) > 0)) + todo -= sz; + + /* Close the pipe, so that child would stop reading */ + RL(close(pp[1])); + + /* And pickup child's exit status */ + RL(waitpid(pid, &st, 0)); + + ATF_REQUIRE_EQ(WEXITSTATUS(st), 0); + } +} + +ATF_TP_ADD_TCS(tp) +{ + ATF_TP_ADD_TC(tp, pipe_restart); + + return atf_no_error(); +} |
