adb/sysdeps/stat.h

/*
 * Copyright (C) 2016 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

#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#if defined(_WIN32)
// stat is broken on Win32: stat on a path with a trailing slash or backslash will always fail with
// ENOENT.
int adb_stat(const char* path, struct adb_stat* buf);

// We later define a macro mapping 'stat' to 'adb_stat'. This causes:
//   struct stat s;
//   stat(filename, &s);
// To turn into the following:
//   struct adb_stat s;
//   adb_stat(filename, &s);
// To get this to work, we need to make 'struct adb_stat' the same as
// 'struct stat'. Note that this definition of 'struct adb_stat' uses the
// *current* macro definition of stat, so it may actually be inheriting from
// struct _stat32i64 (or some other remapping).
struct adb_stat : public stat {};

#undef stat
#define stat adb_stat

// Windows doesn't have lstat.
#define lstat adb_stat

// mingw doesn't define S_IFLNK or S_ISLNK.
#define S_IFLNK 0120000
#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)

// mingw defines S_IFBLK to a different value from bionic.
#undef S_IFBLK
#define S_IFBLK 0060000
#undef S_ISBLK
#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
#endif

// Make sure that host file mode values match the ones on the device.
static_assert(S_IFMT == 00170000, "");
static_assert(S_IFLNK == 0120000, "");
static_assert(S_IFREG == 0100000, "");
static_assert(S_IFBLK == 0060000, "");
static_assert(S_IFDIR == 0040000, "");
static_assert(S_IFCHR == 0020000, "");