debian man page for explain_ftell_or_die

explain_ftell_or_die(3) 				     Library Functions Manual					   explain_ftell_or_die(3)

NAME
       explain_ftell_or_die - get stream position and report errors

SYNOPSIS
       #include <libexplain/ftell.h>
       long explain_ftell_or_die(FILE *fp);
       long explain_ftell_on_error(FILE *fp);

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

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

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

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

       The explain_ftell_on_error function always returns the value return by the wrapped ftell(3) system call.

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

SEE ALSO
       ftell(3)
	       get stream position

       explain_ftell(3)
	       explain ftell(3) errors

       exit(2) terminate the calling process

COPYRIGHT
       libexplain version 0.52
       Copyright (C) 2010 Peter Miller

															   explain_ftell_or_die(3)