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#!/bin/sh
#
# Copyright (c) 2016 EMC Corp.
# 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 AUTHOR 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 AUTHOR 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.
#
# pipe(2) test
. ../default.cfg
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
dir=/tmp
odir=`pwd`
cd $dir
sed '1,/^EOF/d' < $odir/$0 > $dir/pipe2.c
mycc -o pipe2 -Wall -Wextra -O0 -g pipe2.c || exit 1
rm -f pipe2.c
daemon sh -c "(cd $odir/../testcases/swap; ./swap -t 10m -i 20)" > \
/dev/null 2>&1
sleep 10
su $testuser -c /tmp/pipe2
s=$?
while pgrep -q swap; do
pkill -9 swap
done
rm -rf /tmp/pipe2
exit $s
EOF
#include <sys/param.h>
#include <sys/mman.h>
#include <machine/atomic.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
volatile u_int *share, *share2;
#define R1 1 /* sync start */
#define R2 2 /* forks */
#define PIPES 128
#define PARALLEL 32
static void
hand(int i __unused) { /* handler */
fprintf(stderr, "Timed out\n");
_exit(1);
}
void
test(void)
{
size_t len;
int fds[2], r;
int token;
len = PAGE_SIZE;
if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
err(1, "mmap");
if (pipe(fds) == -1)
err(1, "pipe");
token = 0;
write(fds[1], &token, sizeof(token));
for (;;) {
if (share[R2] >= PIPES)
break;
if ((r = fork()) == 0) {
atomic_add_int(&share[R2], 1);
if (read(fds[0], &token, sizeof(token)) != sizeof(token))
err(1, "read");
close(fds[0]);
if (pipe(fds) == -1)
err(1, "pipe");
token++;
if (write(fds[1], &token, sizeof(token)) != sizeof(token))
err(1, "write");
}
if (r == -1)
err(1, "fork()");
if (r != 0)
_exit(0);
}
if (share[R2] == PIPES) {
#if defined(DEBUG)
if (read(fds[0], &token, sizeof(token)) != sizeof(token))
err(1, "final read");
fprintf(stderr, "FINAL read %d from %d\n", token, fds[0]);
#endif
atomic_add_int(&share2[R1], 1);
}
_exit(0);
}
int
main(void)
{
struct sigaction sa;
size_t len;
int i;
len = PAGE_SIZE;
if ((share2 = mmap(NULL, len, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
err(1, "mmap");
sa.sa_handler = SIG_IGN;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (sigaction(SIGCHLD, &sa, 0) == -1)
err(1, "sigaction");
for (i = 0; i < PARALLEL; i++) {
if (fork() == 0)
test();
}
signal(SIGALRM, hand);
alarm(300);
while (share2[R1] != PARALLEL) {
sleep(1);
#if defined(DEBUG)
fprintf(stderr, "share2 = %d\n", share2[R1]);
#endif
}
return (0);
}
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