minix/tests/lib/libc/sys/t_mkfifo.c

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/* $NetBSD: t_mkfifo.c,v 1.2 2011/11/02 06:04:48 jruoho Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jukka Ruohonen.
*
* 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>
__RCSID("$NetBSD: t_mkfifo.c,v 1.2 2011/11/02 06:04:48 jruoho Exp $");
#include <sys/stat.h>
#include <sys/wait.h>
#include <atf-c.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
static const char path[] = "fifo";
static void support(void);
static void
support(void)
{
errno = 0;
if (mkfifo(path, 0600) == 0) {
ATF_REQUIRE(unlink(path) == 0);
return;
}
if (errno == EOPNOTSUPP)
atf_tc_skip("the kernel does not support FIFOs");
else {
atf_tc_fail("mkfifo(2) failed");
}
}
ATF_TC_WITH_CLEANUP(mkfifo_block);
ATF_TC_HEAD(mkfifo_block, tc)
{
atf_tc_set_md_var(tc, "descr", "Test that FIFOs block");
}
ATF_TC_BODY(mkfifo_block, tc)
{
int sta, fd = -1;
pid_t pid;
support();
ATF_REQUIRE(mkfifo(path, 0600) == 0);
pid = fork();
ATF_REQUIRE(pid >= 0);
if (pid == 0) {
/*
* If we open the FIFO as read-only (write-only),
* the call should block until another process
* opens the FIFO for writing (reading).
*/
fd = open(path, O_RDONLY);
_exit(EXIT_FAILURE); /* NOTREACHED */
}
(void)sleep(1);
ATF_REQUIRE(kill(pid, SIGKILL) == 0);
(void)wait(&sta);
if (WIFSIGNALED(sta) == 0 || WTERMSIG(sta) != SIGKILL)
atf_tc_fail("FIFO did not block");
(void)close(fd);
(void)unlink(path);
}
ATF_TC_CLEANUP(mkfifo_block, tc)
{
(void)unlink(path);
}
ATF_TC_WITH_CLEANUP(mkfifo_err);
ATF_TC_HEAD(mkfifo_err, tc)
{
atf_tc_set_md_var(tc, "descr", "Test erros from mkfifo(2)");
}
ATF_TC_BODY(mkfifo_err, tc)
{
char buf[PATH_MAX + 1];
support();
(void)memset(buf, 'x', sizeof(buf));
ATF_REQUIRE(mkfifo(path, 0600) == 0);
errno = 0;
ATF_REQUIRE_ERRNO(EFAULT, mkfifo((char *)-1, 0600) == -1);
errno = 0;
ATF_REQUIRE_ERRNO(EEXIST, mkfifo("/etc/passwd", 0600) == -1);
errno = 0;
ATF_REQUIRE_ERRNO(EEXIST, mkfifo(path, 0600) == -1);
errno = 0;
ATF_REQUIRE_ERRNO(ENAMETOOLONG, mkfifo(buf, 0600) == -1);
errno = 0;
ATF_REQUIRE_ERRNO(ENOENT, mkfifo("/a/b/c/d/e/f/g", 0600) == -1);
ATF_REQUIRE(unlink(path) == 0);
}
ATF_TC_CLEANUP(mkfifo_err, tc)
{
(void)unlink(path);
}
ATF_TC_WITH_CLEANUP(mkfifo_nonblock);
ATF_TC_HEAD(mkfifo_nonblock, tc)
{
atf_tc_set_md_var(tc, "descr", "Test O_NONBLOCK with FIFOs");
}
ATF_TC_BODY(mkfifo_nonblock, tc)
{
int fd, sta;
pid_t pid;
support();
fd = -1;
ATF_REQUIRE(mkfifo(path, 0600) == 0);
pid = fork();
ATF_REQUIRE(pid >= 0);
if (pid == 0) {
/*
* If we open the FIFO as O_NONBLOCK, the O_RDONLY
* call should return immediately, whereas the call
* for write-only should fail with ENXIO.
*/
fd = open(path, O_RDONLY | O_NONBLOCK);
if (fd >= 0)
_exit(EXIT_SUCCESS);
(void)pause(); /* NOTREACHED */
}
(void)sleep(1);
errno = 0;
ATF_REQUIRE_ERRNO(ENXIO, open(path, O_WRONLY | O_NONBLOCK) == -1);
(void)kill(pid, SIGKILL);
(void)wait(&sta);
if (WIFSIGNALED(sta) != 0 || WTERMSIG(sta) == SIGKILL)
atf_tc_fail("FIFO blocked for O_NONBLOCK open(2)");
(void)close(fd);
(void)unlink(path);
}
ATF_TC_CLEANUP(mkfifo_nonblock, tc)
{
(void)unlink(path);
}
ATF_TC_WITH_CLEANUP(mkfifo_perm);
ATF_TC_HEAD(mkfifo_perm, tc)
{
atf_tc_set_md_var(tc, "descr", "Test permissions with mkfifo(2)");
atf_tc_set_md_var(tc, "require.user", "unprivileged");
}
ATF_TC_BODY(mkfifo_perm, tc)
{
support();
errno = 0;
ATF_REQUIRE_ERRNO(EACCES, mkfifo("/root/fifo", 0600) == -1);
ATF_REQUIRE(mkfifo(path, 0600) == 0);
/*
* For some reason this fails with EFTYPE...
*/
errno = 0;
ATF_REQUIRE_ERRNO(EFTYPE, chmod(path, 1777) == -1);
ATF_REQUIRE(unlink(path) == 0);
}
ATF_TC_CLEANUP(mkfifo_perm, tc)
{
(void)unlink(path);
}
ATF_TC_WITH_CLEANUP(mkfifo_stat);
ATF_TC_HEAD(mkfifo_stat, tc)
{
atf_tc_set_md_var(tc, "descr", "Test mkfifo(2) with stat");
}
ATF_TC_BODY(mkfifo_stat, tc)
{
struct stat st;
support();
(void)memset(&st, 0, sizeof(struct stat));
ATF_REQUIRE(mkfifo(path, 0600) == 0);
ATF_REQUIRE(stat(path, &st) == 0);
if (S_ISFIFO(st.st_mode) == 0)
atf_tc_fail("invalid mode from mkfifo(2)");
ATF_REQUIRE(unlink(path) == 0);
}
ATF_TC_CLEANUP(mkfifo_stat, tc)
{
(void)unlink(path);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, mkfifo_block);
ATF_TP_ADD_TC(tp, mkfifo_err);
ATF_TP_ADD_TC(tp, mkfifo_nonblock);
ATF_TP_ADD_TC(tp, mkfifo_perm);
ATF_TP_ADD_TC(tp, mkfifo_stat);
return atf_no_error();
}