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ktorrent/libktorrent/util/fileops.cpp

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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <klocale.h>
#include <kio/netaccess.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <qdir.h>
#include <qfile.h>
#include <qstringlist.h>
#include "fileops.h"
#include "error.h"
#include "log.h"
#include <torrent/globals.h>
#include "file.h"
#include "array.h"
#ifdef HAVE_XFS_XFS_H
#if !defined(HAVE___S64) || !defined(HAVE___U64)
#include <stdint.h>
#endif
#ifndef HAVE___U64
typedef uint64_t __u64;
#endif
#ifndef HAVE___S64
typedef int64_t __s64;
#endif
#include <xfs/xfs.h>
#endif
#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif
#if HAVE_STATVFS
#include <sys/statvfs.h>
#else
#include <sys/param.h>
#include <sys/mount.h>
#endif
namespace bt
{
void MakeDir(const QString & dir,bool nothrow)
{
if (mkdir(QFile::encodeName(dir),0777) < -1)
{
if (!nothrow)
throw Error(i18n("Cannot create directory %1: %2")
.arg(dir).arg(strerror(errno)));
else
{
Out() << QString("Error : Cannot create directory %1 : %2").arg(dir).arg(strerror(errno))<< endl;
}
}
}
void SymLink(const QString & link_to,const QString & link_url,bool nothrow)
{
if (symlink(QFile::encodeName(link_to),QFile::encodeName(link_url)) != 0)
{
if (!nothrow)
throw Error(i18n("Cannot symlink %1 to %2: %3")
.arg(link_url.utf8()).arg(link_to.utf8())
.arg(strerror(errno)));
else
Out() << QString("Error : Cannot symlink %1 to %2: %3")
.arg(link_url.utf8()).arg(link_to.utf8())
.arg(strerror(errno)) << endl;
}
}
void Move(const QString & src,const QString & dst,bool nothrow)
{
// Out() << "Moving " << src << " -> " << dst << endl;
if (!KIO::NetAccess::move(KURL::fromPathOrURL(src),KURL::fromPathOrURL(dst),0))
{
if (!nothrow)
throw Error(i18n("Cannot move %1 to %2: %3")
.arg(src).arg(dst)
.arg(KIO::NetAccess::lastErrorString()));
else
Out() << QString("Error : Cannot move %1 to %2: %3")
.arg(src).arg(dst)
.arg(KIO::NetAccess::lastErrorString()) << endl;
}
}
void CopyFile(const QString & src,const QString & dst,bool nothrow)
{
if (!KIO::NetAccess::file_copy(KURL::fromPathOrURL(src),KURL::fromPathOrURL(dst)))
{
if (!nothrow)
throw Error(i18n("Cannot copy %1 to %2: %3")
.arg(src).arg(dst)
.arg(KIO::NetAccess::lastErrorString()));
else
Out() << QString("Error : Cannot copy %1 to %2: %3")
.arg(src).arg(dst)
.arg(KIO::NetAccess::lastErrorString()) << endl;
}
}
void CopyDir(const QString & src,const QString & dst,bool nothrow)
{
if (!KIO::NetAccess::dircopy(KURL::fromPathOrURL(src),KURL::fromPathOrURL(dst),0))
{
if (!nothrow)
throw Error(i18n("Cannot copy %1 to %2: %3")
.arg(src).arg(dst)
.arg(KIO::NetAccess::lastErrorString()));
else
Out() << QString("Error : Cannot copy %1 to %2: %3")
.arg(src).arg(dst)
.arg(KIO::NetAccess::lastErrorString()) << endl;
}
}
bool Exists(const QString & url)
{
// Out() << "Testing if " << url << " exists " << endl;
if (access(QFile::encodeName(url),F_OK) < 0)
{
// Out() << "No " << endl;
return false;
}
else
{
// Out() << "Yes " << endl;
return true;
}
}
static bool DelDir(const QString & fn)
{
QDir d(fn);
QStringList subdirs = d.entryList(QDir::Dirs);
for (QStringList::iterator i = subdirs.begin(); i != subdirs.end();i++)
{
QString entry = *i;
if (entry == ".." || entry == ".")
continue;
if (!DelDir(d.absFilePath(entry)))
{
Out(SYS_GEN|LOG_DEBUG) << "Delete of " << fn << "/" << entry << " failed !" << endl;
return false;
}
}
QStringList files = d.entryList(QDir::Files | QDir::System | QDir::Hidden);
for (QStringList::iterator i = files.begin(); i != files.end();i++)
{
QString entry = *i;
if (remove(QFile::encodeName(d.absFilePath(entry))) < 0)
{
Out(SYS_GEN|LOG_DEBUG) << "Delete of " << fn << "/" << entry << " failed !" << endl;
return false;
}
}
if (!d.rmdir(d.absPath()))
{
Out(SYS_GEN|LOG_DEBUG) << "Failed to remove " << d.absPath() << endl;
return false;
}
return true;
}
void Delete(const QString & url,bool nothrow)
{
QCString fn = QFile::encodeName(url);
#if HAVE_STAT64
struct stat64 statbuf;
if (lstat64(fn, &statbuf) < 0)
return;
#else
struct stat statbuf;
if (lstat(fn, &statbuf) < 0)
return;
#endif
bool ok = true;
// first see if it is a directory
if (S_ISDIR(statbuf.st_mode))
{
ok = DelDir(url);
}
else
{
ok = remove(fn) >= 0;
}
if (!ok)
{
QString err = i18n("Cannot delete %1: %2")
.arg(url)
.arg(strerror(errno));
if (!nothrow)
throw Error(err);
else
Out() << "Error : " << err << endl;
}
}
void Touch(const QString & url,bool nothrow)
{
if (Exists(url))
return;
File fptr;
if (!fptr.open(url,"wb"))
{
if (!nothrow)
throw Error(i18n("Cannot create %1: %2")
.arg(url)
.arg(fptr.errorString()));
else
Out() << "Error : Cannot create " << url << " : "
<< fptr.errorString() << endl;
}
}
Uint64 FileSize(const QString & url)
{
int ret = 0;
#if HAVE_STAT64
struct stat64 sb;
ret = stat64(QFile::encodeName(url),&sb);
#else
struct stat sb;
ret = stat(QFile::encodeName(url),&sb);
#endif
if (ret < 0)
throw Error(i18n("Cannot calculate the filesize of %1: %2")
.arg(url).arg(strerror(errno)));
return (Uint64)sb.st_size;
}
Uint64 FileSize(int fd)
{
int ret = 0;
#if HAVE_STAT64
struct stat64 sb;
ret = fstat64(fd,&sb);
#else
struct stat sb;
ret = fstat(fd,&sb);
#endif
if (ret < 0)
throw Error(i18n("Cannot calculate the filesize : %2").arg(strerror(errno)));
return (Uint64)sb.st_size;
}
bool FatPreallocate(int fd,Uint64 size)
{
try
{
SeekFile(fd, size - 1, SEEK_SET);
char zero = 0;
if (write(fd, &zero, 1) == -1)
return false;
TruncateFile(fd,size,true);
}
catch (bt::Error & e)
{
Out() << e.toString() << endl;
return false;
}
return true;
}
bool FatPreallocate(const QString & path,Uint64 size)
{
int fd = ::open(QFile::encodeName(path),O_RDWR | O_LARGEFILE);
if (fd < 0)
throw Error(i18n("Cannot open %1 : %2").arg(path).arg(strerror(errno)));
bool ret = FatPreallocate(fd,size);
close(fd);
return ret;
}
#ifdef HAVE_XFS_XFS_H
bool XfsPreallocate(int fd, Uint64 size)
{
if( ! platform_test_xfs_fd(fd) )
{
return false;
}
xfs_flock64_t allocopt;
allocopt.l_whence = 0;
allocopt.l_start = 0;
allocopt.l_len = size;
return (! static_cast<bool>(xfsctl(0, fd, XFS_IOC_RESVSP64, &allocopt)) );
}
bool XfsPreallocate(const QString & path, Uint64 size)
{
int fd = ::open(QFile::encodeName(path), O_RDWR | O_LARGEFILE);
if (fd < 0)
throw Error(i18n("Cannot open %1 : %2").arg(path).arg(strerror(errno)));
bool ret = XfsPreallocate(fd,size);
close(fd);
return ret;
}
#endif
void TruncateFile(int fd,Uint64 size,bool quick)
{
if (FileSize(fd) == size)
return;
if (quick)
{
#if HAVE_FTRUNCATE64
if (ftruncate64(fd,size) == -1)
#else
if (ftruncate(fd,size) == -1)
#endif
throw Error(i18n("Cannot expand file : %1").arg(strerror(errno)));
}
else
{
#if HAVE_POSIX_FALLOCATE64
if (posix_fallocate64(fd,0,size) != 0)
throw Error(i18n("Cannot expand file : %1").arg(strerror(errno)));
#elif HAVE_POSIX_FALLOCATE
if (posix_fallocate(fd,0,size) != 0)
throw Error(i18n("Cannot expand file : %1").arg(strerror(errno)));
#else
SeekFile(fd,0,SEEK_SET);
bt::Array<Uint8> buf(4096);
buf.fill(0);
Uint64 written = 0;
while (written < size)
{
int to_write = size - written;
if (to_write > 4096)
to_write = 4096;
int ret = write(fd,buf,to_write);
if (ret < 0)
throw Error(i18n("Cannot expand file : %1").arg(strerror(errno)));
else if (ret == 0 || ret != (int)to_write)
throw Error(i18n("Cannot expand file").arg(strerror(errno)));
else
written += to_write;
}
#endif
}
}
void TruncateFile(const QString & path,Uint64 size)
{
int fd = ::open(QFile::encodeName(path),O_RDWR | O_LARGEFILE);
if (fd < 0)
throw Error(i18n("Cannot open %1 : %2").arg(path).arg(strerror(errno)));
try
{
TruncateFile(fd,size,true);
close(fd);
}
catch (...)
{
close(fd);
throw;
}
}
void SeekFile(int fd,Int64 off,int whence)
{
#if HAVE_LSEEK64
if (lseek64(fd,off,whence) == -1)
#else
if (lseek(fd,off,whence) == -1)
#endif
throw Error(i18n("Cannot seek in file : %1").arg(strerror(errno)));
}
bool FreeDiskSpace(const QString & path,Uint64 & bytes_free)
{
#if HAVE_STATVFS
#if HAVE_STATVFS64
struct statvfs64 stfs;
if (statvfs64(path.local8Bit(), &stfs) == 0)
#else
struct statvfs stfs;
if (statvfs(path.local8Bit(), &stfs) == 0)
#endif
{
bytes_free = ((Uint64)stfs.f_bavail) * ((Uint64)stfs.f_frsize);
return true;
}
else
{
Out(SYS_GEN|LOG_DEBUG) << "Error : statvfs for " << path << " failed : "
<< QString(strerror(errno)) << endl;
return false;
}
#else
struct statfs stfs;
if (statfs(path.local8Bit(), &stfs) == 0)
{
bytes_free = ((Uint64)stfs.f_bavail) * ((Uint64)stfs.f_bsize);
return true;
}
else
{
Out(SYS_GEN|LOG_DEBUG) << "Error : statfs for " << path << " failed : "
<< QString(strerror(errno)) << endl;
return false;
}
#endif
}
}