diff options
Diffstat (limited to 'tests/sys/kern/pipe/pipe_reverse2_test.c')
-rw-r--r-- | tests/sys/kern/pipe/pipe_reverse2_test.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/tests/sys/kern/pipe/pipe_reverse2_test.c b/tests/sys/kern/pipe/pipe_reverse2_test.c new file mode 100644 index 0000000..4666d95 --- /dev/null +++ b/tests/sys/kern/pipe/pipe_reverse2_test.c @@ -0,0 +1,67 @@ +/*- + * Copyright (c) 2010 Jilles Tjoelker + * 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. + * + * $FreeBSD$ + */ + +#include <sys/select.h> + +#include <err.h> +#include <stdio.h> +#include <unistd.h> + +/* + * Check that pipes can be selected for writing in the reverse direction. + */ +int +main(void) +{ + int pip[2]; + fd_set set; + int n; + + if (pipe(pip) == -1) + err(1, "FAIL: pipe"); + + FD_ZERO(&set); + FD_SET(pip[0], &set); + n = select(pip[1] + 1, NULL, &set, NULL, &(struct timeval){ 0, 0 }); + if (n != 1) + errx(1, "FAIL: select initial reverse direction"); + + n = write(pip[0], "x", 1); + if (n != 1) + err(1, "FAIL: write reverse direction"); + + FD_ZERO(&set); + FD_SET(pip[0], &set); + n = select(pip[1] + 1, NULL, &set, NULL, &(struct timeval){ 0, 0 }); + if (n != 1) + errx(1, "FAIL: select reverse direction after write"); + + printf("PASS\n"); + + return (0); +} |