explain_dup2_or_die3

Usage

Overview

The explain_dup2_or_die function is used to call the dup2(2) system call. On failure an explanation will be printed to stderr, obtained from explain_dup2(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_dup2_or_die(oldfd, newfd);

oldfd

The oldfd, exactly as to be passed to the dup2(2) system call.

newfd

The newfd, exactly as to be passed to the dup2(2) system call.

Returns:

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