FpPWrite

Positional write: write to file descriptor at a certain position.

Declaration

Source position: bunxh.inc line 89

  function FpPWrite(fd: cint; buf: pChar; nbytes: TSize; offset: TOff)
                    : TsSize;

Description

FpPWrite writes nbytes bytes from buffer buf into file descriptor fd starting at offset offset. Offset is measured from the start of the file. This function can only be used on files, not on pipes or sockets (i.e. any seekable file descriptor).

The function returns the number of bytes actually written, or -1 on error.

Errors

On error, -1 is returned.

See also