lua-users home
lua-l archive

[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index] [Thread Index] 


Hi,

Thanks for your reply! I'm eager to learn more about the use of FFI.
However when I try to run your example I get the error: declaration specifier expected near 'FILE' 

Regards

Ralf

On 11/20/2011 05:20 PM, Francesco Abbate wrote:

I cannot resist to the temptations, this can be done so easily with
the FFI module :-)

local ffi = require('ffi')

ffi.cdef [[
   extern FILE *stdin;
   int isatty(int FILEDES);
   int fileno (FILE *STREAM);
]]

function isatty()
    local fd = ffi.C.fileno(ffi.C.stdin)
    return ffi.C.isatty(fd)
end

Please note that the use of "fileno" can be avoided if you assume that
the file descriptor of stdin is 0. This is always true on linux.

Francesco