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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2017 Spectra Logic Corporation
* 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.
*/
/*
* Test cases for operations on DIR objects:
* opendir, readdir, seekdir, telldir, closedir, etc
*/
#include <sys/cdefs.h>
#include <dirent.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <atf-c.h>
ATF_TC(telldir_after_seekdir);
ATF_TC_HEAD(telldir_after_seekdir, tc)
{
atf_tc_set_md_var(tc, "descr", "Calling telldir(3) after seekdir(3) "
"should return the argument passed to seekdir.");
}
ATF_TC_BODY(telldir_after_seekdir, tc)
{
const int NUMFILES = 1000;
char template[] = "dXXXXXX";
char *tmpdir;
int i, dirfd;
DIR *dirp;
struct dirent *de;
long beginning, middle, end, td;
/* Create a temporary directory */
tmpdir = mkdtemp(template);
ATF_REQUIRE_MSG(tmpdir != NULL, "mkdtemp failed");
dirfd = open(tmpdir, O_RDONLY | O_DIRECTORY);
ATF_REQUIRE(dirfd > 0);
/*
* Fill it with files. Must be > 128 to ensure that the directory
* can't fit within a single page
*/
for (i = 0; i < NUMFILES; i = i+1) {
int fd;
char filename[16];
snprintf(filename, sizeof(filename), "%d", i);
fd = openat(dirfd, filename, O_WRONLY | O_CREAT, 0600);
ATF_REQUIRE(fd > 0);
close(fd);
}
/* Get some directory bookmarks in various locations */
dirp = fdopendir(dirfd);
ATF_REQUIRE_MSG(dirfd >= 0, "fdopendir failed");
beginning = telldir(dirp);
for (i = 0; i < NUMFILES / 2; i = i+1) {
de = readdir(dirp);
ATF_REQUIRE_MSG(de != NULL, "readdir failed");
}
middle = telldir(dirp);
for (; i < NUMFILES - 1; i = i+1) {
de = readdir(dirp);
ATF_REQUIRE_MSG(de != NULL, "readdir failed");
}
end = telldir(dirp);
/*
* Seekdir to each bookmark, check the telldir after seekdir condition,
* and check that the bookmark is valid by reading another directory
* entry.
*/
seekdir(dirp, beginning);
td = telldir(dirp);
ATF_CHECK_EQ(beginning, td);
ATF_REQUIRE_MSG(NULL != readdir(dirp), "invalid directory index");
seekdir(dirp, middle);
td = telldir(dirp);
ATF_CHECK_EQ(middle, td);
ATF_REQUIRE_MSG(NULL != readdir(dirp), "invalid directory index");
seekdir(dirp, end);
td = telldir(dirp);
ATF_CHECK_EQ(end, td);
ATF_REQUIRE_MSG(NULL != readdir(dirp), "invalid directory index");
closedir(dirp);
}
ATF_TC(telldir_at_end_of_block);
ATF_TC_HEAD(telldir_at_end_of_block, tc)
{
atf_tc_set_md_var(tc, "descr", "Calling telldir(3) after readdir(3) read the last entry in the block should return a valid location");
}
ATF_TC_BODY(telldir_at_end_of_block, tc)
{
/* For UFS and ZFS, blocks roll over at 128 directory entries. */
const int NUMFILES = 129;
char template[] = "dXXXXXX";
char *tmpdir;
int i, dirfd;
DIR *dirp;
struct dirent *de;
long td;
char last_filename[16];
/* Create a temporary directory */
tmpdir = mkdtemp(template);
ATF_REQUIRE_MSG(tmpdir != NULL, "mkdtemp failed");
dirfd = open(tmpdir, O_RDONLY | O_DIRECTORY);
ATF_REQUIRE(dirfd > 0);
/*
* Fill it with files. Must be > 128 to ensure that the directory
* can't fit within a single page. The "-2" accounts for "." and ".."
*/
for (i = 0; i < NUMFILES - 2; i = i+1) {
int fd;
char filename[16];
snprintf(filename, sizeof(filename), "%d", i);
fd = openat(dirfd, filename, O_WRONLY | O_CREAT, 0600);
ATF_REQUIRE(fd > 0);
close(fd);
}
/* Read all entries within the first page */
dirp = fdopendir(dirfd);
ATF_REQUIRE_MSG(dirfd >= 0, "fdopendir failed");
for (i = 0; i < NUMFILES - 1; i = i + 1)
ATF_REQUIRE_MSG(readdir(dirp) != NULL, "readdir failed");
/* Call telldir at the end of a page */
td = telldir(dirp);
/* Read the last entry */
de = readdir(dirp);
ATF_REQUIRE_MSG(de != NULL, "readdir failed");
strlcpy(last_filename, de->d_name, sizeof(last_filename));
/* Seek back to the bookmark. readdir() should return the last entry */
seekdir(dirp, td);
de = readdir(dirp);
ATF_REQUIRE_STREQ_MSG(last_filename, de->d_name,
"seekdir went to the wrong directory position");
closedir(dirp);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, telldir_after_seekdir);
ATF_TP_ADD_TC(tp, telldir_at_end_of_block);
return atf_no_error();
}
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