libc/upstream-openbsd/android/include/openbsd-compat.h

/*
 * Copyright (C) 2014 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.
 */

#pragma once

#define _BSD_SOURCE
#include <sys/cdefs.h>

#include <unistd.h> // For environ.

#include <stddef.h> // For size_t.

#include <sys/random.h> // For getentropy.

#include "private/bsd_sys_param.h"

#define __BEGIN_HIDDEN_DECLS _Pragma("GCC visibility push(hidden)")
#define __END_HIDDEN_DECLS _Pragma("GCC visibility pop")

extern const char* __progname;

/* Ignore all DEF_STRONG/DEF_WEAK in OpenBSD. */
#define DEF_STRONG(sym)
#define DEF_WEAK(sym)
#define __weak_alias __strong_alias

/* Ignore all __warn_references in OpenBSD. */
#define __warn_references(sym,msg)

#define PROTO_NORMAL(x)

/* OpenBSD's <ctype.h> uses these names, which conflicted with stlport.
 * Additionally, we changed the numeric/digit type from N to D for libcxx.
 */
#define _U _CTYPE_U
#define _L _CTYPE_L
#define _N _CTYPE_D
#define _S _CTYPE_S
#define _P _CTYPE_P
#define _C _CTYPE_C
#define _X _CTYPE_X
#define _B _CTYPE_B

/* OpenBSD has this, but we can't really implement it correctly on Linux. */
#define issetugid() 0

#if !defined(ANDROID_HOST_MUSL)
#define explicit_bzero(p, s) memset(p, 0, s)
#endif

#if defined(ANDROID_HOST_MUSL)
#define __LIBC_HIDDEN__ __attribute__((visibility("hidden")))
#endif

/* OpenBSD has this in paths.h. But this directory doesn't normally exist.
 * Even when it does exist, only the 'shell' user has permissions.
 */
#define _PATH_TMP "/data/local/tmp/"

/* Use appropriate shell depending on process's executable. */
__LIBC_HIDDEN__ extern const char* __bionic_get_shell_path();
#define _PATH_BSHELL __bionic_get_shell_path()

__LIBC_HIDDEN__ extern char* __findenv(const char*, int, int*);
__LIBC_HIDDEN__ extern char* _mktemp(char*);

// Only OpenBSD has this at the moment, and we're more likely to just say
// "malloc is always calloc", so we don't expose this as libc API.
__LIBC_HIDDEN__ void* recallocarray(void*, size_t, size_t, size_t);