FpPipe

Create a set of pipe file handlers

Declaration

Source position: bunxh.inc line 37

Description

FpPipe creates a pipe, i.e. two file objects, one for input, one for output. The file handles are returned in the array fildes. The input handle is in the 0-th element of the array, the output handle is in the 1-st element.

The function returns zero if everything went successfully, a nonzero return value indicates an error.

Errors

In case the function fails, the following return values are possible:

sys_emfile

Too many file descriptors for this process.

sys_enfile

The system file table is full.

See also

Example

Program Example36;
{ Program to demonstrate the AssignPipe function. }
Uses BaseUnix,Unix;
Var pipi,pipo : Text;
 s : String;
begin
 Writeln ('Assigning Pipes.');
 If assignpipe(pipi,pipo)<>0 then
 Writeln('Error assigning pipes !',fpgeterrno);
 Writeln ('Writing to pipe, and flushing.');
 Writeln (pipo,'This is a textstring');close(pipo);
 Writeln ('Reading from pipe.');
 While not eof(pipi) do
 begin
 Readln (pipi,s);
 Writeln ('Read from pipe : ',s);
 end;
 close (pipi);
 writeln ('Closed pipes.');
 writeln
end.

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Documentation generated on: May 14 2021