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//
// File_UNIX.cpp
//
// $Id: //poco/1.4/Foundation/src/File_UNIX.cpp#1 $
//
// Library: Foundation
// Package: Filesystem
// Module: File
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/File_UNIX.h"
#include "Poco/Buffer.h"
#include "Poco/Exception.h"
#include <algorithm>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <utime.h>
#include <cstring>
namespace Poco {
FileImpl::FileImpl()
{
}
FileImpl::FileImpl(const std::string& path): _path(path)
{
std::string::size_type n = _path.size();
if (n > 1 && _path[n - 1] == '/')
_path.resize(n - 1);
}
FileImpl::~FileImpl()
{
}
void FileImpl::swapImpl(FileImpl& file)
{
std::swap(_path, file._path);
}
void FileImpl::setPathImpl(const std::string& path)
{
_path = path;
std::string::size_type n = _path.size();
if (n > 1 && _path[n - 1] == '/')
_path.resize(n - 1);
}
bool FileImpl::existsImpl() const
{
poco_assert (!_path.empty());
struct stat st;
return stat(_path.c_str(), &st) == 0;
}
bool FileImpl::canReadImpl() const
{
poco_assert (!_path.empty());
struct stat st;
if (stat(_path.c_str(), &st) == 0)
{
if (st.st_uid == geteuid())
return (st.st_mode & S_IRUSR) != 0;
else if (st.st_gid == getegid())
return (st.st_mode & S_IRGRP) != 0;
else
return (st.st_mode & S_IROTH) != 0 || geteuid() == 0;
}
else handleLastErrorImpl(_path);
return false;
}
bool FileImpl::canWriteImpl() const
{
poco_assert (!_path.empty());
struct stat st;
if (stat(_path.c_str(), &st) == 0)
{
if (st.st_uid == geteuid())
return (st.st_mode & S_IWUSR) != 0;
else if (st.st_gid == getegid())
return (st.st_mode & S_IWGRP) != 0;
else
return (st.st_mode & S_IWOTH) != 0 || geteuid() == 0;
}
else handleLastErrorImpl(_path);
return false;
}
bool FileImpl::canExecuteImpl() const
{
poco_assert (!_path.empty());
struct stat st;
if (stat(_path.c_str(), &st) == 0)
{
if (st.st_uid == geteuid() || geteuid() == 0)
return (st.st_mode & S_IXUSR) != 0;
else if (st.st_gid == getegid())
return (st.st_mode & S_IXGRP) != 0;
else
return (st.st_mode & S_IXOTH) != 0;
}
else handleLastErrorImpl(_path);
return false;
}
bool FileImpl::isFileImpl() const
{
poco_assert (!_path.empty());
struct stat st;
if (stat(_path.c_str(), &st) == 0)
return S_ISREG(st.st_mode);
else
handleLastErrorImpl(_path);
return false;
}
bool FileImpl::isDirectoryImpl() const
{
poco_assert (!_path.empty());
struct stat st;
if (stat(_path.c_str(), &st) == 0)
return S_ISDIR(st.st_mode);
else
handleLastErrorImpl(_path);
return false;
}
bool FileImpl::isLinkImpl() const
{
poco_assert (!_path.empty());
struct stat st;
if (lstat(_path.c_str(), &st) == 0)
return S_ISLNK(st.st_mode);
else
handleLastErrorImpl(_path);
return false;
}
bool FileImpl::isDeviceImpl() const
{
poco_assert (!_path.empty());
struct stat st;
if (stat(_path.c_str(), &st) == 0)
return S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode);
else
handleLastErrorImpl(_path);
return false;
}
bool FileImpl::isHiddenImpl() const
{
poco_assert (!_path.empty());
Path p(_path);
p.makeFile();
return p.getFileName()[0] == '.';
}
Timestamp FileImpl::createdImpl() const
{
poco_assert (!_path.empty());
#if defined(__APPLE__) && defined(st_birthtime) && !defined(POCO_NO_STAT64) // st_birthtime is available only on 10.5
struct stat64 st;
if (stat64(_path.c_str(), &st) == 0)
return Timestamp::fromEpochTime(st.st_birthtime);
#elif defined(__FreeBSD__)
struct stat st;
if (stat(_path.c_str(), &st) == 0)
return Timestamp::fromEpochTime(st.st_birthtime);
#else
struct stat st;
if (stat(_path.c_str(), &st) == 0)
return Timestamp::fromEpochTime(st.st_ctime);
#endif
else
handleLastErrorImpl(_path);
return 0;
}
Timestamp FileImpl::getLastModifiedImpl() const
{
poco_assert (!_path.empty());
struct stat st;
if (stat(_path.c_str(), &st) == 0)
return Timestamp::fromEpochTime(st.st_mtime);
else
handleLastErrorImpl(_path);
return 0;
}
void FileImpl::setLastModifiedImpl(const Timestamp& ts)
{
poco_assert (!_path.empty());
struct utimbuf tb;
tb.actime = ts.epochTime();
tb.modtime = ts.epochTime();
if (utime(_path.c_str(), &tb) != 0)
handleLastErrorImpl(_path);
}
FileImpl::FileSizeImpl FileImpl::getSizeImpl() const
{
poco_assert (!_path.empty());
struct stat st;
if (stat(_path.c_str(), &st) == 0)
return st.st_size;
else
handleLastErrorImpl(_path);
return 0;
}
void FileImpl::setSizeImpl(FileSizeImpl size)
{
poco_assert (!_path.empty());
if (truncate(_path.c_str(), size) != 0)
handleLastErrorImpl(_path);
}
void FileImpl::setWriteableImpl(bool flag)
{
poco_assert (!_path.empty());
struct stat st;
if (stat(_path.c_str(), &st) != 0)
handleLastErrorImpl(_path);
mode_t mode;
if (flag)
{
mode = st.st_mode | S_IWUSR;
}
else
{
mode_t wmask = S_IWUSR | S_IWGRP | S_IWOTH;
mode = st.st_mode & ~wmask;
}
if (chmod(_path.c_str(), mode) != 0)
handleLastErrorImpl(_path);
}
void FileImpl::setExecutableImpl(bool flag)
{
poco_assert (!_path.empty());
struct stat st;
if (stat(_path.c_str(), &st) != 0)
handleLastErrorImpl(_path);
mode_t mode;
if (flag)
{
mode = st.st_mode | S_IXUSR;
}
else
{
mode_t wmask = S_IXUSR | S_IXGRP | S_IXOTH;
mode = st.st_mode & ~wmask;
}
if (chmod(_path.c_str(), mode) != 0)
handleLastErrorImpl(_path);
}
void FileImpl::copyToImpl(const std::string& path) const
{
poco_assert (!_path.empty());
int sd = open(_path.c_str(), O_RDONLY);
if (sd == -1) handleLastErrorImpl(_path);
struct stat st;
if (fstat(sd, &st) != 0)
{
close(sd);
handleLastErrorImpl(_path);
}
const long blockSize = st.st_blksize;
int dd = open(path.c_str(), O_CREAT | O_TRUNC | O_WRONLY, st.st_mode);
if (dd == -1)
{
close(sd);
handleLastErrorImpl(path);
}
Buffer<char> buffer(blockSize);
try
{
int n;
while ((n = read(sd, buffer.begin(), blockSize)) > 0)
{
if (write(dd, buffer.begin(), n) != n)
handleLastErrorImpl(path);
}
if (n < 0)
handleLastErrorImpl(_path);
}
catch (...)
{
close(sd);
close(dd);
throw;
}
close(sd);
if (fsync(dd) != 0)
{
close(dd);
handleLastErrorImpl(path);
}
if (close(dd) != 0)
handleLastErrorImpl(path);
}
void FileImpl::renameToImpl(const std::string& path)
{
poco_assert (!_path.empty());
if (rename(_path.c_str(), path.c_str()) != 0)
handleLastErrorImpl(_path);
}
void FileImpl::removeImpl()
{
poco_assert (!_path.empty());
int rc;
if (!isLinkImpl() && isDirectoryImpl())
rc = rmdir(_path.c_str());
else
rc = unlink(_path.c_str());
if (rc) handleLastErrorImpl(_path);
}
bool FileImpl::createFileImpl()
{
poco_assert (!_path.empty());
int n = open(_path.c_str(), O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
if (n != -1)
{
close(n);
return true;
}
if (n == -1 && errno == EEXIST)
return false;
else
handleLastErrorImpl(_path);
return false;
}
bool FileImpl::createDirectoryImpl()
{
poco_assert (!_path.empty());
if (existsImpl() && isDirectoryImpl())
return false;
if (mkdir(_path.c_str(), S_IRWXU | S_IRWXG | S_IRWXO) != 0)
handleLastErrorImpl(_path);
return true;
}
void FileImpl::handleLastErrorImpl(const std::string& path)
{
switch (errno)
{
case EIO:
throw IOException(path, errno);
case EPERM:
throw FileAccessDeniedException("insufficient permissions", path, errno);
case EACCES:
throw FileAccessDeniedException(path, errno);
case ENOENT:
throw FileNotFoundException(path, errno);
case ENOTDIR:
throw OpenFileException("not a directory", path, errno);
case EISDIR:
throw OpenFileException("not a file", path, errno);
case EROFS:
throw FileReadOnlyException(path, errno);
case EEXIST:
throw FileExistsException(path, errno);
case ENOSPC:
throw FileException("no space left on device", path, errno);
case EDQUOT:
throw FileException("disk quota exceeded", path, errno);
#if !defined(_AIX)
case ENOTEMPTY:
throw FileException("directory not empty", path, errno);
#endif
case ENAMETOOLONG:
throw PathSyntaxException(path, errno);
case ENFILE:
case EMFILE:
throw FileException("too many open files", path, errno);
default:
throw FileException(std::strerror(errno), path, errno);
}
}
} // namespace Poco