NAME

       explain_fileno_or_die - check and reset stream status and report errors

SYNOPSIS

       #include <libexplain/fileno.h>
       int explain_fileno_or_die(FILE *fp);
       int explain_fileno_on_error(FILE *fp);

DESCRIPTION

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

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

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

RETURN VALUE

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

       The explain_fileno_on_error function always returns the value return  by  the  wrapped  fileno(3)  system
       call.

EXAMPLE

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

SEE ALSO

       fileno(3)
               check and reset stream status

       explain_fileno(3)
               explain fileno(3) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2009 Peter Miller

                                                                                        explain_fileno_or_die(3)