2 * Copyright 2017 Facebook, Inc.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
21 #if defined(__APPLE__)
22 #if __has_include(<crt_externs.h>)
23 #include <crt_externs.h>
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
37 char* mktemp(char* tn);
38 char* mkdtemp(char* tn);
39 int mkstemp(char* tn);
40 char* realpath(const char* path, char* resolved_path);
41 int setenv(const char* name, const char* value, int overwrite);
42 int 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>)
46 char*** _NSGetEnviron(void);
48 #define environ (*_NSGetEnviron())