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/*
* Copyright (c) 2021, Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
* 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 <AK/String.h>
#include <AK/StringBuilder.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
// FIXME
static const char* TEXT_FAIL = "\x1b[01;31m";
static const char* TEXT_PASS = "\x1b[01;32m";
static const char* TEXT_RESET = "\x1b[0m";
static const char* TMPDIR_PATTERN = "/tmp/overlong_realpath_XXXXXX";
static const char* PATH_LOREM_250 = "This-is-an-annoyingly-long-name-that-should-take-up-exactly-two-hundred-and-fifty-characters-and-is-surprisingly-difficult-to-fill-with-reasonably-meaningful-text-which-is-necessary-because-that-makes-it-easier-for-my-eyes-to-spot-any-corruption-fast";
static const size_t ITERATION_DEPTH = 17;
static bool check_result(const char* what, const String& expected, const char* actual)
{
bool good = expected == actual;
printf("%s%s%s: %s = \"%s\" (%zu characters)\n", good ? TEXT_PASS : TEXT_FAIL, good ? "GOOD" : "FAIL", TEXT_RESET, what, actual, actual ? strlen(actual) : 0);
return good;
}
int main()
{
// We want to construct a path that is over PATH_MAX characters long.
// This cannot be done in a single step.
// First, switch to a known environment:
char* tmp_dir = strdup("/tmp/overlong_realpath_XXXXXX");
if (!mkdtemp(tmp_dir)) {
perror("mkdtmp");
return 1;
}
if (chdir(tmp_dir) < 0) {
perror("chdir tmpdir");
return 1;
}
// Then, create a long path.
StringBuilder expected;
expected.append(tmp_dir);
// But first, demonstrate the functionality at a reasonable depth:
bool all_good = true;
auto expected_str = expected.build();
all_good &= check_result("getwd", expected_str, getwd(static_cast<char*>(calloc(1, PATH_MAX))));
all_good &= check_result("getcwd", expected_str, getcwd(nullptr, 0));
all_good &= check_result("realpath", expected_str, realpath(".", nullptr));
for (size_t i = 0; i < ITERATION_DEPTH; ++i) {
if (mkdir(PATH_LOREM_250, 0700) < 0) {
perror("mkdir iter");
printf("%sFAILED%s in iteration %zu.\n", TEXT_FAIL, TEXT_RESET, i);
return 1;
}
expected.append('/');
expected.append(PATH_LOREM_250);
if (chdir(PATH_LOREM_250) < 0) {
perror("chdir iter");
printf("%sFAILED%s in iteration %zu.\n", TEXT_FAIL, TEXT_RESET, i);
return 1;
}
}
printf("cwd should now be ridiculously large.\n");
// Evaluate
expected_str = expected.build();
all_good &= check_result("getwd", {}, getwd(static_cast<char*>(calloc(1, PATH_MAX))));
all_good &= check_result("getcwd", expected_str, getcwd(nullptr, 0));
all_good &= check_result("realpath", expected_str, realpath(".", nullptr));
VERIFY(strlen(PATH_LOREM_250) == 250);
VERIFY(strlen(TMPDIR_PATTERN) + ITERATION_DEPTH * (1 + strlen(PATH_LOREM_250)) == expected_str.length());
VERIFY(expected_str.length() > PATH_MAX);
if (all_good) {
printf("Overall: %sPASS%s\n", TEXT_PASS, TEXT_RESET);
return 0;
} else {
printf("Overall: %sFAIL%s\n", TEXT_FAIL, TEXT_RESET);
return 2;
}
}
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