1/*
2 * Copyright 2016-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#pragma once
18
19#include <cstdlib>
20
21#if defined(__APPLE__)
22#if __has_include(<crt_externs.h>)
23#include <crt_externs.h> // @manual
24#endif
25#endif
26
27extern "C" {
28#ifdef _WIN32
29// These are technically supposed to be defined linux/limits.h and
30// sys/param.h respectively, but Windows defines _MAX_PATH in stdlib.h,
31// so, instead of creating two headers for a single define each, we put
32// them here, where they are likely to already have been included in the
33// code that needs them.
34#define PATH_MAX _MAX_PATH
35#define MAXPATHLEN _MAX_PATH
36
37char* mktemp(char* tn);
38char* mkdtemp(char* tn);
39int mkstemp(char* tn);
40char* realpath(const char* path, char* resolved_path);
41int setenv(const char* name, const char* value, int overwrite);
42int unsetenv(const char* name);
43#elif defined(__APPLE__)
44// environ doesn't work well with dylibs, so use _NSGetEnviron instead.
45#if !__has_include(<crt_externs.h>)
46char*** _NSGetEnviron(void);
47#endif
48#define environ (*_NSGetEnviron())
49#endif
50
51#if !__linux__ && !FOLLY_MOBILE
52int clearenv();
53#endif
54}
55