debian man page for explain_vfprintf_or_die

explain_vfprintf_or_die(3)				     Library Functions Manual					explain_vfprintf_or_die(3)

NAME
       explain_vfprintf_or_die - formatted output conversion and report errors

SYNOPSIS
       #include <libexplain/vfprintf.h>
       void explain_vfprintf_or_die(FILE *fp, const char *format, va_list ap);
       int explain_vfprintf_on_error(FILE *fp, const char *format, va_list ap);

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

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

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

       format  The format, exactly as to be passed to the vfprintf(3) system call.

       ap      The ap, exactly as to be passed to the vfprintf(3) system call.

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

       The explain_vfprintf_on_error function always returns the value return by the wrapped vfprintf(3) system call.

EXAMPLE
       The explain_vfprintf_or_die function is intended to be used in a fashion similar to the following example:
	      explain_vfprintf_or_die(fp, format, ap);

SEE ALSO
       vfprintf(3)
	       formatted output conversion

       explain_vfprintf(3)
	       explain vfprintf(3) errors

       exit(2) terminate the calling process

COPYRIGHT
       libexplain version 0.52
       Copyright (C) 2010 Peter Miller

															explain_vfprintf_or_die(3)