stderr

Updated: October 26, 2022

The standard error stream

Synopsis:

#include <stdio.h>

FILE * stderr;

Description:

This global variable defines the standard error stream. It's set to the console by default, but you can redirect it by calling freopen().

STDERR_FILENO, which is defined in <unistd.h>, defines the file descriptor that corresponds to stderr.

Classification:

ANSI, POSIX 1003.1