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implement file copying for Linux

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Signed-off-by: Ivailo Monev <xakepa10@laimg.moc>
This commit is contained in:
Ivailo Monev 2019-12-13 12:58:56 +00:00
parent 9b02a8dd63
commit f0c42af362
2 changed files with 55 additions and 0 deletions
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2
src/core/global/qplatformdefs.h
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@ -93,6 +93,7 @@
#define QT_LSEEK ::lseek64 #define QT_LSEEK ::lseek64
#define QT_FSTAT ::fstat64 #define QT_FSTAT ::fstat64
#define QT_FTRUNCATE ::ftruncate64 #define QT_FTRUNCATE ::ftruncate64
#define QT_CREAT ::creat64
// Standard C89 // Standard C89
#define QT_FOPEN ::fopen64 #define QT_FOPEN ::fopen64
@ -125,6 +126,7 @@
#define QT_LSEEK ::lseek #define QT_LSEEK ::lseek
#define QT_FSTAT ::fstat #define QT_FSTAT ::fstat
#define QT_FTRUNCATE ::ftruncate #define QT_FTRUNCATE ::ftruncate
#define QT_CREAT ::creat
// Posix extensions to C89 // Posix extensions to C89
#if !defined(QT_NO_USE_FSEEKO) #if !defined(QT_NO_USE_FSEEKO)

53
src/core/io/qfilesystemengine_unix.cpp
View file

@ -44,6 +44,10 @@
#include <pwd.h> #include <pwd.h>
#include <grp.h> #include <grp.h>
#ifdef Q_OS_LINUX
# include <sys/sendfile.h>
#endif
QT_BEGIN_NAMESPACE QT_BEGIN_NAMESPACE
bool QFileSystemEngine::isCaseSensitive() bool QFileSystemEngine::isCaseSensitive()
@ -370,9 +374,58 @@ bool QFileSystemEngine::createLink(const QFileSystemEntry &source, const QFileSy
//static //static
bool QFileSystemEngine::copyFile(const QFileSystemEntry &source, const QFileSystemEntry &target, QSystemError &error) bool QFileSystemEngine::copyFile(const QFileSystemEntry &source, const QFileSystemEntry &target, QSystemError &error)
{ {
#ifdef Q_OS_LINUX
// not in qplatformdefs.h since it is Linux specific
#if defined(QT_USE_XOPEN_LFS_EXTENSIONS) && defined(QT_LARGEFILE_SUPPORT)
# define QT_SENDFILE ::sendfile64
#else
# define QT_SENDFILE ::sendfile
#endif
QT_STATBUF st;
if (QT_STAT(source.nativeFilePath().constData(), &st) != -1) {
if (!S_ISREG(st.st_mode))
return false;
}
const int sourcefd = QT_OPEN(source.nativeFilePath().constData(), O_RDONLY);
if (sourcefd == -1) {
error = QSystemError(errno, QSystemError::StandardLibraryError);
return false;
}
const int targetfd = QT_CREAT(target.nativeFilePath().constData(), st.st_mode);
if (targetfd == -1) {
::close(sourcefd);
error = QSystemError(errno, QSystemError::StandardLibraryError);
return false;
}
QT_OFF_T tosend = st.st_size;
ssize_t sendresult = QT_SENDFILE(targetfd, sourcefd, Q_NULLPTR, tosend);
while (sendresult != tosend) {
if (sendresult == -1) {
error = QSystemError(errno, QSystemError::StandardLibraryError);
::close(sourcefd);
::close(targetfd);
return false;
}
tosend -= sendresult;
sendresult = QT_SENDFILE(targetfd, sourcefd, &tosend, tosend);
}
::close(sourcefd);
::close(targetfd);
return true;
#undef QT_SENDFILE
#else
Q_UNUSED(source); Q_UNUSED(source);
Q_UNUSED(target); Q_UNUSED(target);
error = QSystemError(ENOSYS, QSystemError::StandardLibraryError); //Function not implemented error = QSystemError(ENOSYS, QSystemError::StandardLibraryError); //Function not implemented
#endif // Q_OS_LINUX
return false; return false;
} }