explain_fpurge_or_die - purge a stream and report errors

       libexplain version 1.4
       Copyright (C) 2010 Peter Miller

                                                                                        explain_fpurge_or_die(3)

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

       The explain_fpurge_on_error function is used to call the fpurge(3) system call. On failure an explanation
       will be printed to stderr, obtained from the explain_fpurge(3) function, but still returns to the caller.

       fp      The fp, exactly as to be passed to the fpurge(3) system call.

       The explain_fpurge_or_die function is intended to be used in a fashion similar to the following example:
              explain_fpurge_or_die(fp);

       explain_fpurge_or_die - purge a stream and report errors

       The  explain_fpurge_or_die  function  only  returns  on  success,  see fpurge(3) for more information. On
       failure, prints an explanation and exits, it does not return.

       The explain_fpurge_on_error function always returns the value return  by  the  wrapped  fpurge(3)  system
       call.

fpurge(3)
               purge a stream

       explain_fpurge(3)
               explain fpurge(3) errors

       exit(2) terminate the calling process

       #include <libexplain/fpurge.h>
       void explain_fpurge_or_die(FILE *fp);
       int explain_fpurge_on_error(FILE *fp);