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 1.4
       Copyright (C) 2010 Peter Miller

                                                                        explain_vprintf_or_die(3)