fildes - create a new file descriptor

fildes: fn(fd: int): ref FD;

## returns nil if unsuccessful.

Description

The fildes function uses the integer file descriptor fd to create a new Limbo file descriptor (FD), suitable for other Sys module functions. It returns nil if it cannot convert fd.

Example

include "sys.m";
	sys: Sys;
	
stderr, stdout, stdin: ref Sys->FD;	
. . .
# Define the standard file handles:
	stdin  = sys->fildes(0);
	stdout = sys->fildes(1);
	stderr = sys->fildes(2);
. . .
sys->fprint(stderr, "program: write error: %r\n");

See Also

System Module Overview

open, create - open/create a file for reading or writing