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
@@ -422,37 +422,40 @@ bool QFile::open( int m, int f )
 		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
@@ -525,33 +528,33 @@ Q_LONG QFile::readBlock( char *p, Q_ULONG len )
 #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 ) {
@@ -616,33 +619,35 @@ Q_LONG QFile::writeBlock( const char *p, Q_ULONG len )
 		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;
 }