debian man page for explain_vprintf_or_die

explain_vprintf_or_die(3)				     Library Functions Manual					 explain_vprintf_or_die(3)

NAME
       explain_vprintf_or_die - formatted output conversion and report errors

SYNOPSIS
       #include <libexplain/vprintf.h>
       int explain_vprintf_or_die(const char *format, va_list ap);
       int explain_vprintf_on_error(const char *format, va_list ap);

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

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

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

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

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

       The explain_vprintf_on_error function always returns the value return by the wrapped vprintf(3) system call.

EXAMPLE
       The explain_vprintf_or_die function is intended to be used in a fashion similar to the following example:
	      int result = explain_vprintf_or_die(format, ap);

SEE ALSO
       vprintf(3)
	       formatted output conversion

       explain_vprintf(3)
	       explain vprintf(3) errors

       exit(2) terminate the calling process

COPYRIGHT
       libexplain version 0.52
       Copyright (C) 2010 Peter Miller

															 explain_vprintf_or_die(3)