#include unsigned char __stdin[BUFSIZ]; unsigned char __stdout[BUFSIZ]; struct _io_buf _stdin = { 0, 0, IO_READMODE , __stdin, __stdin }; struct _io_buf _stdout = { 1, 0, IO_WRITEMODE, 0, 0 }; struct _io_buf _stderr = { 2, 0, IO_WRITEMODE + IO_UNBUFF, NULL, NULL }; struct _io_buf *_io_table[_NFILES] = { &_stdin, &_stdout, &_stderr, 0 };