explain_dup_or_die(3)

duplicate a file descriptor and report errors

Section 3 libexplain-dev bookworm source

Description

explain_dup_or_die

NAME

explain_dup_or_die - duplicate a file descriptor and report errors

SYNOPSIS

#include <libexplain/dup.h>
void explain_dup_or_die(int fildes);

DESCRIPTION

The explain_dup_or_die function is used to call the dup(2) system call. On failure an explanation will be printed to stderr, obtained from explain_dup(3), and then the process terminates by calling exit(EXIT_FAILURE).

This function is intended to be used in a fashion similar to the following example:

explain_dup_or_die(fildes);

fildes

The fildes, exactly as to be passed to the dup(2) system call.

Returns:

This function only returns on success. On failure, prints an explanation and exits.