_IOLBF 53 usr/lib/libc/stdio/setbuffer.c return (setvbuf(fp, (char *)NULL, _IOLBF, (size_t)0)); _IOLBF 57 usr/lib/libc/stdio/setvbuf.c if ((mode != _IOFBF && mode != _IOLBF) || (int)size < 0) _IOLBF 80 usr/lib/libc/stdio/setvbuf.c if (mode == _IOLBF)