explain_dup2_or_die - duplicate a file descriptor and report errors

       libexplain version 1.4
       Copyright (C) 2008 Peter Miller

                                                                                          explain_dup2_or_die(3)

       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.

       explain_dup2_or_die - duplicate a file descriptor and report errors

dup2(2) duplicate a file descriptor

       explain_dup2(3)
               explain dup2(2) errors

       exit(2) terminate the calling process

       #include <libexplain/dup2.h>
       void explain_dup2_or_die(int oldfd, int newfd);