| -rw-r--r-- | qmake/tools/qfile_unix.cpp | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/qmake/tools/qfile_unix.cpp b/qmake/tools/qfile_unix.cpp index 2d5a856..460bf06 100644 --- a/qmake/tools/qfile_unix.cpp +++ b/qmake/tools/qfile_unix.cpp @@ -390,101 +390,104 @@ bool QFile::open( int m, FILE *f ) bool QFile::open( int m, int f ) { if ( isOpen() ) { #if defined(QT_CHECK_RANGE) qWarning( "QFile::open: File already open" ); #endif return FALSE; } init(); setMode( m |IO_Raw ); setState( IO_Open ); fd = f; ext_f = TRUE; struct stat st; ::fstat( fd, &st ); ioIndex = (Offset)::lseek(fd, 0, SEEK_CUR); if ( (st.st_mode & S_IFMT) != S_IFREG || f == 0 ) { // stdin is not seekable... // non-seekable setType( IO_Sequential ); length = INT_MAX; ioIndex = 0; } else { length = (Offset)st.st_size; if ( length == 0 && isReadable() ) { // try if you can read from it (if you can, it's a sequential // device; e.g. a file in the /proc filesystem) int c = getch(); if ( c != -1 ) { ungetch(c); setType( IO_Sequential ); length = INT_MAX; ioIndex = 0; } resetStatus(); } } return TRUE; } /*! Returns the file size. \sa at() */ QIODevice::Offset QFile::size() const { struct stat st; + int ret = 0; if ( isOpen() ) { - ::fstat( fh ? fileno(fh) : fd, &st ); + ret = ::fstat( fh ? fileno(fh) : fd, &st ); } else { - ::stat( QFile::encodeName(fn), &st ); + ret = ::stat( QFile::encodeName(fn), &st ); } + if ( ret == -1 ) + return 0; #if defined(QT_LARGEFILE_SUPPORT) && !defined(QT_ABI_64BITOFFSET) return (uint)st.st_size > UINT_MAX ? UINT_MAX : (QIODevice::Offset)st.st_size; #else return st.st_size; #endif } /*! \overload Sets the file index to \a pos. Returns TRUE if successful; otherwise returns FALSE. Example: \code QFile f( "data.bin" ); f.open( IO_ReadOnly ); // index set to 0 f.at( 100 ); // set index to 100 f.at( f.at()+50 ); // set index to 150 f.at( f.size()-80 ); // set index to 80 before EOF f.close(); \endcode Use \c at() without arguments to retrieve the file offset. \warning The result is undefined if the file was open()'ed using the \c IO_Append specifier. \sa size(), open() */ bool QFile::at( Offset pos ) { if ( !isOpen() ) { #if defined(QT_CHECK_STATE) qWarning( "QFile::at: File is not open" ); #endif return FALSE; } if ( isSequentialAccess() ) return FALSE; bool ok; if ( isRaw() ) { off_t l = ::lseek( fd, pos, SEEK_SET ); ok = ( l != -1 ); pos = (Offset)l; } else { // buffered file @@ -493,188 +496,190 @@ bool QFile::at( Offset pos ) #else ok = ( ::fseek(fh, pos, SEEK_SET) == 0 ); #endif } if ( ok ) ioIndex = pos; #if defined(QT_CHECK_RANGE) else #if defined(QT_LARGEFILE_SUPPORT) && defined(QT_ABI_64BITOFFSET) qWarning( "QFile::at: Cannot set file position %llu", pos ); #else qWarning( "QFile::at: Cannot set file position %lu", pos ); #endif #endif return ok; } /*! \reimp \warning We have experienced problems with some C libraries when a buffered file is opened for both reading and writing. If a read operation takes place immediately after a write operation, the read buffer contains garbage data. Worse, the same garbage is written to the file. Calling flush() before readBlock() solved this problem. */ Q_LONG QFile::readBlock( char *p, Q_ULONG len ) { #if defined(QT_CHECK_NULL) if ( !p ) qWarning( "QFile::readBlock: Null pointer error" ); #endif #if defined(QT_CHECK_STATE) if ( !isOpen() ) { qWarning( "QFile::readBlock: File not open" ); return -1; } if ( !isReadable() ) { qWarning( "QFile::readBlock: Read operation not permitted" ); return -1; } #endif Q_ULONG nread = 0; // number of bytes read if ( !ungetchBuffer.isEmpty() ) { // need to add these to the returned string. uint l = ungetchBuffer.length(); while( nread < l ) { - *p = ungetchBuffer[ l - nread - 1 ]; + *p = ungetchBuffer.at( l - nread - 1 ); p++; nread++; } ungetchBuffer.truncate( l - nread ); } if ( nread < len ) { if ( isRaw() ) { // raw file nread += ::read( fd, p, len-nread ); if ( len && nread <= 0 ) { nread = 0; setStatus(IO_ReadError); } } else { // buffered file nread += fread( p, 1, len-nread, fh ); if ( (uint)nread != len ) { if ( ferror( fh ) || nread==0 ) setStatus(IO_ReadError); } } } if ( !isSequentialAccess() ) ioIndex += nread; return nread; } /*! \reimp Writes \a len bytes from \a p to the file and returns the number of bytes actually written. Returns -1 if a serious error occurred. \warning When working with buffered files, data may not be written to the file at once. Call flush() to make sure the data is really written. \sa readBlock() */ Q_LONG QFile::writeBlock( const char *p, Q_ULONG len ) { #if defined(QT_CHECK_NULL) if ( p == 0 && len != 0 ) qWarning( "QFile::writeBlock: Null pointer error" ); #endif #if defined(QT_CHECK_STATE) if ( !isOpen() ) { // file not open qWarning( "QFile::writeBlock: File not open" ); return -1; } if ( !isWritable() ) { // writing not permitted qWarning( "QFile::writeBlock: Write operation not permitted" ); return -1; } #endif Q_ULONG nwritten; // number of bytes written if ( isRaw() ) // raw file nwritten = ::write( fd, (void *)p, len ); else // buffered file nwritten = fwrite( p, 1, len, fh ); if ( nwritten != len ) { // write error if ( errno == ENOSPC ) // disk is full setStatus( IO_ResourceError ); else setStatus( IO_WriteError ); if ( !isSequentialAccess() ) { if ( isRaw() ) // recalc file position ioIndex = (Offset)::lseek( fd, 0, SEEK_CUR ); else #if defined(QT_LARGEFILE_SUPPORT) ioIndex = (Offset)::fseeko( fh, 0, SEEK_CUR ); #else ioIndex = (Offset)::fseek( fh, 0, SEEK_CUR ); #endif } } else { if ( !isSequentialAccess() ) ioIndex += nwritten; } if ( ioIndex > length ) // update file length length = ioIndex; return nwritten; } /*! Returns the file handle of the file. This is a small positive integer, suitable for use with C library - functions such as fdopen() and fcntl(), as well as with QSocketNotifier. + functions such as fdopen() and fcntl(). On systems that use file + descriptors for sockets (ie. Unix systems, but not Windows) the handle + can be used with QSocketNotifier as well. If the file is not open or there is an error, handle() returns -1. \sa QSocketNotifier */ int QFile::handle() const { if ( !isOpen() ) return -1; else if ( fh ) return fileno( fh ); else return fd; } /*! Closes an open file. The file is not closed if it was opened with an existing file handle. If the existing file handle is a \c FILE*, the file is flushed. If the existing file handle is an \c int file descriptor, nothing is done to the file. Some "write-behind" filesystems may report an unspecified error on closing the file. These errors only indicate that something may have gone wrong since the previous open(). In such a case status() reports IO_UnspecifiedError after close(), otherwise IO_Ok. \sa open(), flush() */ void QFile::close() { bool ok = FALSE; if ( isOpen() ) { // file is not open if ( fh ) { // buffered file if ( ext_f ) ok = fflush( fh ) != -1; // flush instead of closing else ok = fclose( fh ) != -1; } else { // raw file if ( ext_f ) ok = TRUE; // cannot close else ok = ::close( fd ) != -1; } |