|explain_dup2_or_die(3)||Library Functions Manual||explain_dup2_or_die(3)|
explain_dup2_or_die - duplicate a file descriptor and report errors
void explain_dup2_or_die(int oldfd, int newfd);
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:
libexplain version 1.4
Copyright (C) 2008 Peter Miller