NAME

       explain_ftello_or_die - get stream position and report errors

SYNOPSIS

       #include <libexplain/ftello.h>
       off_t explain_ftello_or_die(FILE *fp);
       off_t explain_ftello_on_error(FILE *fp);

DESCRIPTION

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

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

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

RETURN VALUE

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

       The explain_ftello_on_error function always  returns  the  value  return  by  the  wrapped
       ftello(3) system call.

EXAMPLE

       The  explain_ftello_or_die  function  is  intended  to be used in a fashion similar to the
       following example:
              off_t result = explain_ftello_or_die(fp);

SEE ALSO

       ftello(3)
               get stream position

       explain_ftello(3)
               explain ftello(3) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2013 Peter Miller

                                                                         explain_ftello_or_die(3)