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/*
* Copyright (C) 2005 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.
*/
#define LOG_TAG "misc"
//
// Miscellaneous utility functions.
//
#include <androidfw/misc.h>
#include "android-base/logging.h"
#ifdef __linux__
#include <sys/statvfs.h>
#include <sys/vfs.h>
#endif // __linux__
#include <errno.h>
#include <sys/stat.h>
#include <cstdio>
#include <cstring>
#include <tuple>
namespace android {
/*
* Get a file's type.
*/
FileType getFileType(const char* fileName)
{
struct stat sb;
if (stat(fileName, &sb) < 0) {
if (errno == ENOENT || errno == ENOTDIR)
return kFileTypeNonexistent;
else {
PLOG(ERROR) << "getFileType(): stat(" << fileName << ") failed";
return kFileTypeUnknown;
}
} else {
if (S_ISREG(sb.st_mode))
return kFileTypeRegular;
else if (S_ISDIR(sb.st_mode))
return kFileTypeDirectory;
else if (S_ISCHR(sb.st_mode))
return kFileTypeCharDev;
else if (S_ISBLK(sb.st_mode))
return kFileTypeBlockDev;
else if (S_ISFIFO(sb.st_mode))
return kFileTypeFifo;
#if defined(S_ISLNK)
else if (S_ISLNK(sb.st_mode))
return kFileTypeSymlink;
#endif
#if defined(S_ISSOCK)
else if (S_ISSOCK(sb.st_mode))
return kFileTypeSocket;
#endif
else
return kFileTypeUnknown;
}
}
static ModDate getModDate(const struct stat& st) {
#ifdef _WIN32
return st.st_mtime;
#else
return st.st_mtim;
#endif
}
ModDate getFileModDate(const char* fileName) {
struct stat sb;
if (stat(fileName, &sb) < 0) {
return kInvalidModDate;
}
return getModDate(sb);
}
ModDate getFileModDate(int fd) {
struct stat sb;
if (fstat(fd, &sb) < 0) {
return kInvalidModDate;
}
if (sb.st_nlink <= 0) {
errno = ENOENT;
return kInvalidModDate;
}
return getModDate(sb);
}
#ifndef __linux__
// No need to implement these on the host, the functions only matter on a device.
bool isReadonlyFilesystem(const char*) {
return false;
}
bool isReadonlyFilesystem(int) {
return false;
}
#else // __linux__
bool isReadonlyFilesystem(const char* path) {
struct statfs sfs;
if (::statfs(path, &sfs)) {
PLOG(ERROR) << "isReadonlyFilesystem(): statfs(" << path << ") failed";
return false;
}
return (sfs.f_flags & ST_RDONLY) != 0;
}
bool isReadonlyFilesystem(int fd) {
struct statfs sfs;
if (::fstatfs(fd, &sfs)) {
PLOG(ERROR) << "isReadonlyFilesystem(): fstatfs(" << fd << ") failed";
return false;
}
return (sfs.f_flags & ST_RDONLY) != 0;
}
#endif // __linux__
} // namespace android
bool operator==(const timespec& l, const timespec& r) {
return std::tie(l.tv_sec, l.tv_nsec) == std::tie(r.tv_sec, l.tv_nsec);
}
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