NAME

       explain_vsnprintf_or_die - formatted output conversion and report errors

SYNOPSIS

       #include <libexplain/vsnprintf.h>
       int  explain_vsnprintf_or_die(char  *data,  size_t  data_size, const char *format, va_list
       ap);
       int explain_vsnprintf_on_error(char *data, size_t data_size, const char  *format,  va_list
       ap);

DESCRIPTION

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

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

       data    The data, exactly as to be passed to the vsnprintf(3) system call.

       data_size
               The data_size, exactly as to be passed to the vsnprintf(3) system call.

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

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

RETURN VALUE

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

       The explain_vsnprintf_on_error function always returns the value  return  by  the  wrapped
       vsnprintf(3) system call.

EXAMPLE

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

SEE ALSO

       vsnprintf(3)
               formatted output conversion

       explain_vsnprintf(3)
               explain vsnprintf(3) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2010 Peter Miller

                                                                      explain_vsnprintf_or_die(3)