387 lines
7.8 KiB
C
387 lines
7.8 KiB
C
/* $NetBSD: t_dup.c,v 1.9 2017/01/13 20:31:53 christos Exp $ */
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/*-
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* Copyright (c) 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jukka Ruohonen.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: t_dup.c,v 1.9 2017/01/13 20:31:53 christos Exp $");
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <atf-c.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sysexits.h>
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static char path[] = "dup";
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static void check_mode(bool, bool, bool);
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static void
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check_mode(bool _dup, bool _dup2, bool _dup3)
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{
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int mode[3] = { O_RDONLY, O_WRONLY, O_RDWR };
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int perm[5] = { 0700, 0400, 0600, 0444, 0666 };
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struct stat st, st1;
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int fd, fd1, fd2;
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size_t i, j;
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/*
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* Check that a duplicated descriptor
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* retains the mode of the original file.
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*/
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for (i = 0; i < __arraycount(mode); i++) {
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for (j = 0; j < __arraycount(perm); j++) {
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fd1 = open(path, mode[i] | O_CREAT, perm[j]);
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fd2 = open("/etc/passwd", O_RDONLY);
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ATF_REQUIRE(fd1 >= 0);
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ATF_REQUIRE(fd2 >= 0);
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if (_dup != false)
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fd = dup(fd1);
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else if (_dup2 != false)
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fd = dup2(fd1, fd2);
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else if (_dup3 != false)
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fd = dup3(fd1, fd2, O_CLOEXEC);
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else {
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fd = -1;
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}
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ATF_REQUIRE(fd >= 0);
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(void)memset(&st, 0, sizeof(struct stat));
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(void)memset(&st1, 0, sizeof(struct stat));
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ATF_REQUIRE(fstat(fd, &st) == 0);
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ATF_REQUIRE(fstat(fd1, &st1) == 0);
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if (st.st_mode != st1.st_mode)
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atf_tc_fail("invalid mode");
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(void)close(fd);
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(void)close(fd1);
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(void)close(fd2);
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(void)unlink(path);
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}
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}
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}
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ATF_TC(dup2_basic);
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ATF_TC_HEAD(dup2_basic, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A basic test of dup2(2)");
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}
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ATF_TC_BODY(dup2_basic, tc)
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{
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int fd, fd1, fd2;
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fd1 = open("/etc/passwd", O_RDONLY);
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fd2 = open("/etc/passwd", O_RDONLY);
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ATF_REQUIRE(fd1 >= 0);
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ATF_REQUIRE(fd2 >= 0);
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fd = dup2(fd1, fd2);
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ATF_REQUIRE(fd >= 0);
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if (fd != fd2)
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atf_tc_fail("invalid descriptor");
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(void)close(fd);
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(void)close(fd1);
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ATF_REQUIRE(close(fd2) != 0);
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}
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ATF_TC(dup2_err);
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ATF_TC_HEAD(dup2_err, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test error conditions of dup2(2)");
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}
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ATF_TC_BODY(dup2_err, tc)
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{
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int fd;
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fd = open("/etc/passwd", O_RDONLY);
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ATF_REQUIRE(fd >= 0);
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errno = 0;
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ATF_REQUIRE_ERRNO(EBADF, dup2(-1, -1) == -1);
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errno = 0;
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ATF_REQUIRE_ERRNO(EBADF, dup2(fd, -1) == -1);
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errno = 0;
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ATF_REQUIRE_ERRNO(EBADF, dup2(-1, fd) == -1);
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/*
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* Note that this should not fail with EINVAL.
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*/
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ATF_REQUIRE(dup2(fd, fd) != -1);
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(void)close(fd);
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}
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ATF_TC(dup2_max);
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ATF_TC_HEAD(dup2_max, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test dup2(2) against limits");
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}
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ATF_TC_BODY(dup2_max, tc)
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{
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struct rlimit res;
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(void)memset(&res, 0, sizeof(struct rlimit));
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(void)getrlimit(RLIMIT_NOFILE, &res);
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errno = 0;
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ATF_REQUIRE_ERRNO(EBADF, dup2(STDERR_FILENO, res.rlim_cur + 1) == -1);
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}
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ATF_TC_WITH_CLEANUP(dup2_mode);
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ATF_TC_HEAD(dup2_mode, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A basic test of dup2(2)");
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}
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ATF_TC_BODY(dup2_mode, tc)
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{
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check_mode(false, true, false);
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}
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ATF_TC_CLEANUP(dup2_mode, tc)
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{
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(void)unlink(path);
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}
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ATF_TC(dup3_err);
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ATF_TC_HEAD(dup3_err, tc)
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{
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atf_tc_set_md_var(tc, "descr",
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"Test error conditions of dup3(2) (PR lib/45148)");
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}
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ATF_TC_BODY(dup3_err, tc)
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{
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int fd;
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fd = open("/etc/passwd", O_RDONLY);
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ATF_REQUIRE(fd >= 0);
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errno = 0;
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ATF_REQUIRE(dup3(fd, fd, O_CLOEXEC) != -1);
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errno = 0;
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ATF_REQUIRE_ERRNO(EBADF, dup3(-1, -1, O_CLOEXEC) == -1);
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errno = 0;
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ATF_REQUIRE_ERRNO(EBADF, dup3(fd, -1, O_CLOEXEC) == -1);
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errno = 0;
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ATF_REQUIRE_ERRNO(EBADF, dup3(-1, fd, O_CLOEXEC) == -1);
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errno = 0;
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ATF_REQUIRE_ERRNO(EINVAL, dup3(fd, 1, O_NOFOLLOW) == -1);
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(void)close(fd);
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}
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ATF_TC(dup3_max);
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ATF_TC_HEAD(dup3_max, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test dup3(2) against limits");
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}
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ATF_TC_BODY(dup3_max, tc)
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{
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struct rlimit res;
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(void)memset(&res, 0, sizeof(struct rlimit));
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(void)getrlimit(RLIMIT_NOFILE, &res);
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errno = 0;
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ATF_REQUIRE_ERRNO(EBADF, dup3(STDERR_FILENO,
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res.rlim_cur + 1, O_CLOEXEC) == -1);
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}
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ATF_TC_WITH_CLEANUP(dup3_mode);
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ATF_TC_HEAD(dup3_mode, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A basic test of dup3(2)");
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}
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ATF_TC_BODY(dup3_mode, tc)
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{
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check_mode(false, false, true);
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}
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ATF_TC_CLEANUP(dup3_mode, tc)
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{
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(void)unlink(path);
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}
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ATF_TC(dup_err);
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ATF_TC_HEAD(dup_err, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test error conditions of dup(2)");
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}
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ATF_TC_BODY(dup_err, tc)
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{
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errno = 0;
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ATF_REQUIRE_ERRNO(EBADF, dup(-1) == -1);
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}
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ATF_TC_WITH_CLEANUP(dup_max);
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ATF_TC_HEAD(dup_max, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test dup(2) against limits");
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}
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ATF_TC_BODY(dup_max, tc)
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{
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struct rlimit res;
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int *buf, fd, sta;
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size_t i, n;
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pid_t pid;
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pid = fork();
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ATF_REQUIRE(pid >= 0);
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if (pid == 0) {
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/*
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* Open a temporary file until the
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* maximum number of open files is
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* reached. Ater that dup(2) family
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* should fail with EMFILE.
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*/
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(void)closefrom(0);
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(void)memset(&res, 0, sizeof(struct rlimit));
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n = 10;
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res.rlim_cur = res.rlim_max = n;
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if (setrlimit(RLIMIT_NOFILE, &res) != 0)
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_exit(EX_OSERR);
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buf = calloc(n, sizeof(int));
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if (buf == NULL)
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_exit(EX_OSERR);
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buf[0] = mkstemp(path);
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if (buf[0] < 0)
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_exit(EX_OSERR);
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for (i = 1; i < n; i++) {
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buf[i] = open(path, O_RDONLY);
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if (buf[i] < 0)
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_exit(EX_OSERR);
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}
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errno = 0;
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fd = dup(buf[0]);
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if (fd != -1 || errno != EMFILE)
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_exit(EX_DATAERR);
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_exit(EXIT_SUCCESS);
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}
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(void)wait(&sta);
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if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS) {
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if (WEXITSTATUS(sta) == EX_OSERR)
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atf_tc_fail("system call error");
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if (WEXITSTATUS(sta) == EX_DATAERR)
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atf_tc_fail("dup(2) dupped more than RLIMIT_NOFILE");
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atf_tc_fail("unknown error");
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}
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(void)unlink(path);
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}
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ATF_TC_CLEANUP(dup_max, tc)
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{
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(void)unlink(path);
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}
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ATF_TC_WITH_CLEANUP(dup_mode);
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ATF_TC_HEAD(dup_mode, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A basic test of dup(2)");
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}
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ATF_TC_BODY(dup_mode, tc)
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{
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check_mode(true, false, false);
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}
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ATF_TC_CLEANUP(dup_mode, tc)
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{
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(void)unlink(path);
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, dup2_basic);
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ATF_TP_ADD_TC(tp, dup2_err);
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ATF_TP_ADD_TC(tp, dup2_max);
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ATF_TP_ADD_TC(tp, dup2_mode);
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ATF_TP_ADD_TC(tp, dup3_err);
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ATF_TP_ADD_TC(tp, dup3_max);
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ATF_TP_ADD_TC(tp, dup3_mode);
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ATF_TP_ADD_TC(tp, dup_err);
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ATF_TP_ADD_TC(tp, dup_max);
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ATF_TP_ADD_TC(tp, dup_mode);
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return atf_no_error();
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}
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