explain_realpath_or_die - return canonical pathname and report errors

       libexplain version 1.4
       Copyright (C) 2011 Peter Miller

                                                                                      explain_realpath_or_die(3)

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

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

       pathname
               The pathname, exactly as to be passed to the realpath(3) system call.

       resolved_pathname
               The resolved_pathname, exactly as to be passed to the realpath(3) system call.

       The  explain_realpath_or_die  function  is  intended  to  be  used  in a fashion similar to the following
       example:
              char *result = explain_realpath_or_die(pathname, resolved_pathname);

       explain_realpath_or_die - return canonical pathname and report errors

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

       The explain_realpath_on_error function always returns the value return by the wrapped realpath(3)  system
       call.

realpath(3)
               return the canonicalized absolute pathname

       explain_realpath(3)
               explain realpath(3) errors

       exit(2) terminate the calling process

       #include <libexplain/realpath.h>
       char *explain_realpath_or_die(const char *pathname, char *resolved_pathname);
       char *explain_realpath_on_error(const char *pathname, char *resolved_pathname);