227 lines
5.2 KiB
C
227 lines
5.2 KiB
C
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/* $NetBSD: t_write.c,v 1.2 2011/10/19 16:19:30 jruoho Exp $ */
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/*-
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* Copyright (c) 2001, 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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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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__COPYRIGHT("@(#) Copyright (c) 2008\
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The NetBSD Foundation, inc. All rights reserved.");
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__RCSID("$NetBSD: t_write.c,v 1.2 2011/10/19 16:19:30 jruoho Exp $");
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#include <sys/uio.h>
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#include <sys/syslimits.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 <signal.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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static void sighandler(int);
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static bool fail = false;
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static const char *path = "write";
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static void
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sighandler(int signo)
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{
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fail = false;
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}
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ATF_TC_WITH_CLEANUP(write_err);
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ATF_TC_HEAD(write_err, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Checks errors from write(2)");
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}
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ATF_TC_BODY(write_err, tc)
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{
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char rbuf[3] = { 'a', 'b', 'c' };
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char wbuf[3] = { 'x', 'y', 'z' };
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int fd;
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errno = 0;
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ATF_REQUIRE_ERRNO(EBADF, write(-1, wbuf, sizeof(wbuf)) == -1);
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fd = open(path, O_RDWR | O_CREAT);
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if (fd >= 0) {
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errno = 0;
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ATF_REQUIRE_ERRNO(0, write(fd, wbuf, 3) == 3);
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errno = 0;
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ATF_REQUIRE_ERRNO(EINVAL, write(fd, wbuf, SIZE_MAX) == -1);
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errno = 0;
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ATF_REQUIRE_ERRNO(EFAULT, write(fd, (void *)-1, 1) == -1);
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/*
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* Check that the above bogus write(2)
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* calls did not corrupt the file.
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*/
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ATF_REQUIRE(lseek(fd, 0, SEEK_SET) == 0);
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ATF_REQUIRE(read(fd, rbuf, 3) == 3);
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ATF_REQUIRE(memcmp(rbuf, wbuf, 3) == 0);
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(void)close(fd);
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(void)unlink(path);
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}
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}
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ATF_TC_CLEANUP(write_err, tc)
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{
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(void)unlink(path);
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}
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ATF_TC(write_pipe);
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ATF_TC_HEAD(write_pipe, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Checks for EPIPE from write(2)");
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}
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ATF_TC_BODY(write_pipe, tc)
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{
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int fds[2];
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ATF_REQUIRE(pipe(fds) == 0);
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ATF_REQUIRE(signal(SIGPIPE, sighandler) == 0);
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ATF_REQUIRE(write(fds[1], "x", 1) != -1);
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ATF_REQUIRE(close(fds[0]) == 0);
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errno = 0;
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fail = true;
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if (write(fds[1], "x", 1) != -1 || errno != EPIPE)
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atf_tc_fail_nonfatal("expected EPIPE but write(2) succeeded");
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ATF_REQUIRE(close(fds[1]) == 0);
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if (fail != false)
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atf_tc_fail_nonfatal("SIGPIPE was not raised");
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}
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ATF_TC_WITH_CLEANUP(write_pos);
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ATF_TC_HEAD(write_pos, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Checks that write(2) "
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"updates the file position");
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}
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ATF_TC_BODY(write_pos, tc)
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{
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const size_t n = 123;
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size_t i;
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int fd;
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fd = open(path, O_RDWR | O_CREAT);
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ATF_REQUIRE(fd >= 0);
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for (i = 0; i < n; i++) {
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ATF_REQUIRE(write(fd, "x", 1) == 1);
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ATF_REQUIRE(lseek(fd, 0, SEEK_CUR) == (off_t)(i + 1));
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}
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ATF_REQUIRE(close(fd) == 0);
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ATF_REQUIRE(unlink(path) == 0);
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}
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ATF_TC_CLEANUP(write_pos, tc)
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{
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(void)unlink(path);
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}
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ATF_TC_WITH_CLEANUP(write_ret);
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ATF_TC_HEAD(write_ret, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Checks return values from write(2)");
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}
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ATF_TC_BODY(write_ret, tc)
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{
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const size_t n = 99;
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char buf[123];
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size_t i, j;
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int fd;
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fd = open(path, O_WRONLY | O_CREAT);
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ATF_REQUIRE(fd >= 0);
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(void)memset(buf, 'x', sizeof(buf));
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for (i = j = 0; i < n; i++)
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j += write(fd, buf, sizeof(buf));
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if (j != n * 123)
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atf_tc_fail("inconsistent return values from write(2)");
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(void)close(fd);
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(void)unlink(path);
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}
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ATF_TC_CLEANUP(write_ret, tc)
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{
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(void)unlink(path);
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}
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ATF_TC(writev_iovmax);
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ATF_TC_HEAD(writev_iovmax, tc)
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{
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atf_tc_set_md_var(tc, "timeout", "10");
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atf_tc_set_md_var(tc, "descr",
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"Checks that file descriptor is properly FILE_UNUSE()d "
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"when iovcnt is greater than IOV_MAX");
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}
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ATF_TC_BODY(writev_iovmax, tc)
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{
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ssize_t retval;
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(void)printf("Calling writev(2, NULL, IOV_MAX + 1)...\n");
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errno = 0;
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retval = writev(2, NULL, IOV_MAX + 1);
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ATF_REQUIRE_EQ_MSG(retval, -1, "got: %zd", retval);
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ATF_REQUIRE_EQ_MSG(errno, EINVAL, "got: %s", strerror(errno));
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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, write_err);
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ATF_TP_ADD_TC(tp, write_pipe);
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ATF_TP_ADD_TC(tp, write_pos);
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ATF_TP_ADD_TC(tp, write_ret);
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ATF_TP_ADD_TC(tp, writev_iovmax);
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return atf_no_error();
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}
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