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

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/* $NetBSD: t_dup.c,v 1.8 2012/03/18 07:00:51 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_dup.c,v 1.8 2012/03/18 07:00:51 jruoho Exp $");
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <atf-c.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sysexits.h>
static char path[] = "dup";
static void check_mode(bool, bool, bool);
static void
check_mode(bool _dup, bool _dup2, bool _dup3)
{
int mode[3] = { O_RDONLY, O_WRONLY, O_RDWR };
int perm[5] = { 0700, 0400, 0600, 0444, 0666 };
struct stat st, st1;
int fd, fd1, fd2;
size_t i, j;
/*
* Check that a duplicated descriptor
* retains the mode of the original file.
*/
for (i = 0; i < __arraycount(mode); i++) {
for (j = 0; j < __arraycount(perm); j++) {
fd1 = open(path, mode[i] | O_CREAT, perm[j]);
fd2 = open("/etc/passwd", O_RDONLY);
ATF_REQUIRE(fd1 >= 0);
ATF_REQUIRE(fd2 >= 0);
if (_dup != false)
fd = dup(fd1);
else if (_dup2 != false)
fd = dup2(fd1, fd2);
else if (_dup3 != false)
fd = dup3(fd1, fd2, O_CLOEXEC);
else {
fd = -1;
}
ATF_REQUIRE(fd >= 0);
(void)memset(&st, 0, sizeof(struct stat));
(void)memset(&st1, 0, sizeof(struct stat));
ATF_REQUIRE(fstat(fd, &st) == 0);
ATF_REQUIRE(fstat(fd1, &st1) == 0);
if (st.st_mode != st1.st_mode)
atf_tc_fail("invalid mode");
(void)close(fd);
(void)close(fd1);
(void)close(fd2);
(void)unlink(path);
}
}
}
ATF_TC(dup2_basic);
ATF_TC_HEAD(dup2_basic, tc)
{
atf_tc_set_md_var(tc, "descr", "A basic test of dup2(2)");
}
ATF_TC_BODY(dup2_basic, tc)
{
int fd, fd1, fd2;
fd1 = open("/etc/passwd", O_RDONLY);
fd2 = open("/etc/passwd", O_RDONLY);
ATF_REQUIRE(fd1 >= 0);
ATF_REQUIRE(fd2 >= 0);
fd = dup2(fd1, fd2);
ATF_REQUIRE(fd >= 0);
if (fd != fd2)
atf_tc_fail("invalid descriptor");
(void)close(fd);
(void)close(fd1);
ATF_REQUIRE(close(fd2) != 0);
}
ATF_TC(dup2_err);
ATF_TC_HEAD(dup2_err, tc)
{
atf_tc_set_md_var(tc, "descr", "Test error conditions of dup2(2)");
}
ATF_TC_BODY(dup2_err, tc)
{
int fd;
fd = open("/etc/passwd", O_RDONLY);
ATF_REQUIRE(fd >= 0);
errno = 0;
ATF_REQUIRE_ERRNO(EBADF, dup2(-1, -1) == -1);
errno = 0;
ATF_REQUIRE_ERRNO(EBADF, dup2(fd, -1) == -1);
errno = 0;
ATF_REQUIRE_ERRNO(EBADF, dup2(-1, fd) == -1);
/*
* Note that this should not fail with EINVAL.
*/
ATF_REQUIRE(dup2(fd, fd) != -1);
(void)close(fd);
}
ATF_TC(dup2_max);
ATF_TC_HEAD(dup2_max, tc)
{
atf_tc_set_md_var(tc, "descr", "Test dup2(2) against limits");
}
ATF_TC_BODY(dup2_max, tc)
{
struct rlimit res;
(void)memset(&res, 0, sizeof(struct rlimit));
(void)getrlimit(RLIMIT_NOFILE, &res);
errno = 0;
ATF_REQUIRE_ERRNO(EBADF, dup2(STDERR_FILENO, res.rlim_cur + 1) == -1);
}
ATF_TC_WITH_CLEANUP(dup2_mode);
ATF_TC_HEAD(dup2_mode, tc)
{
atf_tc_set_md_var(tc, "descr", "A basic test of dup2(2)");
}
ATF_TC_BODY(dup2_mode, tc)
{
check_mode(false, true, false);
}
ATF_TC_CLEANUP(dup2_mode, tc)
{
(void)unlink(path);
}
ATF_TC(dup3_err);
ATF_TC_HEAD(dup3_err, tc)
{
atf_tc_set_md_var(tc, "descr",
"Test error conditions of dup3(2) (PR lib/45148)");
}
ATF_TC_BODY(dup3_err, tc)
{
int fd;
fd = open("/etc/passwd", O_RDONLY);
ATF_REQUIRE(fd >= 0);
errno = 0;
ATF_REQUIRE(dup3(fd, fd, O_CLOEXEC) != -1);
errno = 0;
ATF_REQUIRE_ERRNO(EBADF, dup3(-1, -1, O_CLOEXEC) == -1);
errno = 0;
ATF_REQUIRE_ERRNO(EBADF, dup3(fd, -1, O_CLOEXEC) == -1);
errno = 0;
ATF_REQUIRE_ERRNO(EBADF, dup3(-1, fd, O_CLOEXEC) == -1);
errno = 0;
ATF_REQUIRE_ERRNO(EINVAL, dup3(fd, 1, O_NOFOLLOW) == -1);
(void)close(fd);
}
ATF_TC(dup3_max);
ATF_TC_HEAD(dup3_max, tc)
{
atf_tc_set_md_var(tc, "descr", "Test dup3(2) against limits");
}
ATF_TC_BODY(dup3_max, tc)
{
struct rlimit res;
(void)memset(&res, 0, sizeof(struct rlimit));
(void)getrlimit(RLIMIT_NOFILE, &res);
errno = 0;
ATF_REQUIRE_ERRNO(EBADF, dup3(STDERR_FILENO,
res.rlim_cur + 1, O_CLOEXEC) == -1);
}
ATF_TC_WITH_CLEANUP(dup3_mode);
ATF_TC_HEAD(dup3_mode, tc)
{
atf_tc_set_md_var(tc, "descr", "A basic test of dup3(2)");
}
ATF_TC_BODY(dup3_mode, tc)
{
check_mode(false, false, true);
}
ATF_TC_CLEANUP(dup3_mode, tc)
{
(void)unlink(path);
}
ATF_TC(dup_err);
ATF_TC_HEAD(dup_err, tc)
{
atf_tc_set_md_var(tc, "descr", "Test error conditions of dup(2)");
}
ATF_TC_BODY(dup_err, tc)
{
errno = 0;
ATF_REQUIRE_ERRNO(EBADF, dup(-1) == -1);
}
ATF_TC_WITH_CLEANUP(dup_max);
ATF_TC_HEAD(dup_max, tc)
{
atf_tc_set_md_var(tc, "descr", "Test dup(2) against limits");
}
ATF_TC_BODY(dup_max, tc)
{
struct rlimit res;
int *buf, fd, sta;
size_t i, n;
pid_t pid;
pid = fork();
ATF_REQUIRE(pid >= 0);
if (pid == 0) {
/*
* Open a temporary file until the
* maximum number of open files is
* reached. Ater that dup(2) family
* should fail with EMFILE.
*/
(void)closefrom(0);
(void)memset(&res, 0, sizeof(struct rlimit));
n = 10;
res.rlim_cur = res.rlim_max = n;
if (setrlimit(RLIMIT_NOFILE, &res) != 0)
_exit(EX_OSERR);
buf = calloc(n, sizeof(int));
if (buf == NULL)
_exit(EX_OSERR);
buf[0] = mkstemp(path);
if (buf[0] < 0)
_exit(EX_OSERR);
for (i = 1; i < n; i++) {
buf[i] = open(path, O_RDONLY);
if (buf[i] < 0)
_exit(EX_OSERR);
}
errno = 0;
fd = dup(buf[0]);
if (fd != -1 || errno != EMFILE)
_exit(EX_DATAERR);
_exit(EXIT_SUCCESS);
}
(void)wait(&sta);
if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS) {
if (WEXITSTATUS(sta) == EX_OSERR)
atf_tc_fail("system call error");
if (WEXITSTATUS(sta) == EX_DATAERR)
atf_tc_fail("dup(2) dupped more than RLIMIT_NOFILE");
atf_tc_fail("unknown error");
}
(void)unlink(path);
}
ATF_TC_CLEANUP(dup_max, tc)
{
(void)unlink(path);
}
ATF_TC_WITH_CLEANUP(dup_mode);
ATF_TC_HEAD(dup_mode, tc)
{
atf_tc_set_md_var(tc, "descr", "A basic test of dup(2)");
}
ATF_TC_BODY(dup_mode, tc)
{
check_mode(true, false, false);
}
ATF_TC_CLEANUP(dup_mode, tc)
{
(void)unlink(path);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, dup2_basic);
ATF_TP_ADD_TC(tp, dup2_err);
ATF_TP_ADD_TC(tp, dup2_max);
ATF_TP_ADD_TC(tp, dup2_mode);
ATF_TP_ADD_TC(tp, dup3_err);
ATF_TP_ADD_TC(tp, dup3_max);
ATF_TP_ADD_TC(tp, dup3_mode);
ATF_TP_ADD_TC(tp, dup_err);
ATF_TP_ADD_TC(tp, dup_max);
ATF_TP_ADD_TC(tp, dup_mode);
return atf_no_error();
}