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Having an alias function that only wraps another one is silly, and keeping the more obvious name should flush out more uses of deprecated strings. No behavior change.
87 lines
3.0 KiB
C++
87 lines
3.0 KiB
C++
/*
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* Copyright (c) 2021, Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibTest/TestCase.h>
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#include <AK/DeprecatedString.h>
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#include <AK/StringBuilder.h>
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#include <errno.h>
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#include <limits.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 <sys/stat.h>
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#include <unistd.h>
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static constexpr char TMPDIR_PATTERN[] = "/tmp/overlong_realpath_XXXXXX";
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static constexpr 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";
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static constexpr size_t ITERATION_DEPTH = 17;
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static void check_result(char const* what, DeprecatedString const& expected, char const* actual)
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{
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if (expected != actual)
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FAIL(DeprecatedString::formatted("Expected {} to be \"{}\" ({} characters)", what, actual, actual ? strlen(actual) : 0));
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}
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TEST_CASE(overlong_realpath)
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{
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// We want to construct a path that is over PATH_MAX characters long.
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// This cannot be done in a single step.
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// First, switch to a known environment:
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char tmp_dir[] = "/tmp/overlong_realpath_XXXXXX";
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errno = 0;
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auto* new_dir = mkdtemp(tmp_dir);
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VERIFY(new_dir != nullptr);
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VERIFY(errno == 0);
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errno = 0;
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auto ret = chdir(tmp_dir);
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VERIFY(ret >= 0);
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VERIFY(errno == 0);
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// Then, create a long path.
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StringBuilder expected;
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expected.append({ tmp_dir, strlen(tmp_dir) });
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// But first, demonstrate the functionality at a reasonable depth:
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auto expected_str = expected.to_deprecated_string();
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check_result("getwd", expected_str, getwd(static_cast<char*>(calloc(1, PATH_MAX))));
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check_result("getcwd", expected_str, getcwd(nullptr, 0));
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check_result("realpath", expected_str, realpath(".", nullptr));
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for (size_t i = 0; i < ITERATION_DEPTH; ++i) {
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ret = mkdir(PATH_LOREM_250, S_IRWXU);
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if (ret < 0) {
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perror("mkdir iter");
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FAIL(DeprecatedString::formatted("Unable to mkdir the overlong path fragment in iteration {}", i));
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return;
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}
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expected.append('/');
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expected.append({ PATH_LOREM_250, strlen(PATH_LOREM_250) });
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ret = chdir(PATH_LOREM_250);
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if (ret < 0) {
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perror("chdir iter");
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FAIL(DeprecatedString::formatted("Unable to chdir to the overlong path fragment in iteration {}", i));
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return;
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}
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}
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outln("cwd should now be ridiculously large");
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// Evaluate
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expected_str = expected.to_deprecated_string();
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check_result("getwd", {}, getwd(static_cast<char*>(calloc(1, PATH_MAX))));
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check_result("getcwd", expected_str, getcwd(nullptr, 0));
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check_result("realpath", expected_str, realpath(".", nullptr));
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VERIFY(strlen(PATH_LOREM_250) == 250);
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VERIFY(strlen(TMPDIR_PATTERN) + ITERATION_DEPTH * (1 + strlen(PATH_LOREM_250)) == expected_str.length());
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VERIFY(expected_str.length() > PATH_MAX);
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}
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