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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <algorithm>
#include <set>
#include <string>
static void CheckProcSelf(std::set<std::string>& names) {
// We have a good idea of what should be in /proc/self.
ASSERT_TRUE(names.find(".") != names.end());
ASSERT_TRUE(names.find("..") != names.end());
ASSERT_TRUE(names.find("cmdline") != names.end());
ASSERT_TRUE(names.find("fd") != names.end());
ASSERT_TRUE(names.find("stat") != names.end());
}
TEST(dirent, scandir) {
// Get everything from /proc/self...
dirent** entries;
int entry_count = scandir("/proc/self", &entries, NULL, alphasort);
ASSERT_GE(entry_count, 0);
// Turn the directory entries into a set and vector of the names.
std::set<std::string> name_set;
std::vector<std::string> unsorted_name_list;
for (size_t i = 0; i < static_cast<size_t>(entry_count); ++i) {
name_set.insert(entries[i]->d_name);
unsorted_name_list.push_back(entries[i]->d_name);
free(entries[i]);
}
free(entries);
// No duplicates.
ASSERT_EQ(name_set.size(), unsorted_name_list.size());
// All entries sorted.
std::vector<std::string> sorted_name_list(unsorted_name_list);
std::sort(sorted_name_list.begin(), sorted_name_list.end());
ASSERT_EQ(sorted_name_list, unsorted_name_list);
CheckProcSelf(name_set);
}
TEST(dirent, fdopendir_invalid) {
ASSERT_TRUE(fdopendir(-1) == NULL);
ASSERT_EQ(EBADF, errno);
int fd = open("/dev/null", O_RDONLY);
ASSERT_NE(fd, -1);
ASSERT_TRUE(fdopendir(fd) == NULL);
ASSERT_EQ(ENOTDIR, errno);
close(fd);
}
TEST(dirent, fdopendir) {
int fd = open("/proc/self", O_RDONLY);
DIR* d = fdopendir(fd);
ASSERT_TRUE(d != NULL);
dirent* e = readdir(d);
ASSERT_STREQ(e->d_name, ".");
ASSERT_EQ(closedir(d), 0);
// fdopendir(3) took ownership, so closedir(3) closed our fd.
ASSERT_EQ(close(fd), -1);
ASSERT_EQ(EBADF, errno);
}
TEST(dirent, opendir_invalid) {
ASSERT_TRUE(opendir("/does/not/exist") == NULL);
ASSERT_EQ(ENOENT, errno);
ASSERT_TRUE(opendir("/dev/null") == NULL);
ASSERT_EQ(ENOTDIR, errno);
}
TEST(dirent, opendir) {
DIR* d = opendir("/proc/self");
ASSERT_TRUE(d != NULL);
dirent* e = readdir(d);
ASSERT_STREQ(e->d_name, ".");
ASSERT_EQ(closedir(d), 0);
}
TEST(dirent, closedir_invalid) {
DIR* d = NULL;
ASSERT_EQ(closedir(d), -1);
ASSERT_EQ(EINVAL, errno);
}
TEST(dirent, closedir) {
DIR* d = opendir("/proc/self");
ASSERT_TRUE(d != NULL);
ASSERT_EQ(closedir(d), 0);
}
TEST(dirent, readdir) {
DIR* d = opendir("/proc/self");
ASSERT_TRUE(d != NULL);
std::set<std::string> name_set;
errno = 0;
dirent* e;
while ((e = readdir(d)) != NULL) {
name_set.insert(e->d_name);
}
// Reading to the end of the directory is not an error.
// readdir(3) returns NULL, but leaves errno as 0.
ASSERT_EQ(0, errno);
ASSERT_EQ(closedir(d), 0);
CheckProcSelf(name_set);
}
TEST(dirent, readdir_r) {
DIR* d = opendir("/proc/self");
ASSERT_TRUE(d != NULL);
std::set<std::string> name_set;
errno = 0;
dirent storage;
dirent* e = NULL;
while (readdir_r(d, &storage, &e) == 0 && e != NULL) {
name_set.insert(e->d_name);
}
// Reading to the end of the directory is not an error.
// readdir_r(3) returns NULL, but leaves errno as 0.
ASSERT_EQ(0, errno);
ASSERT_EQ(closedir(d), 0);
CheckProcSelf(name_set);
}
TEST(dirent, rewinddir) {
DIR* d = opendir("/proc/self");
ASSERT_TRUE(d != NULL);
// Get all the names once...
std::vector<std::string> pass1;
dirent* e;
while ((e = readdir(d)) != NULL) {
pass1.push_back(e->d_name);
}
// ...rewind...
rewinddir(d);
// ...and get all the names again.
std::vector<std::string> pass2;
while ((e = readdir(d)) != NULL) {
pass2.push_back(e->d_name);
}
ASSERT_EQ(closedir(d), 0);
// We should have seen the same names in the same order both times.
ASSERT_EQ(pass1.size(), pass2.size());
for (size_t i = 0; i < pass1.size(); ++i) {
ASSERT_EQ(pass1[i], pass2[i]);
}
}