module os // file descriptor based operations: pub fn fd_close(fd int) int { return C.close(fd) } pub fn fd_write(fd int, s string) { mut sp := s.str mut remaining := s.len for remaining > 0 { written := C.write(fd, sp, remaining) if written < 0 { return } remaining = remaining - written sp = unsafe {sp + written} } } pub fn fd_slurp(fd int) []string { mut res := []string{} for { s, b := fd_read(fd, 4096) if b <= 0 { break } res << s } return res } pub fn fd_read(fd int, maxbytes int) (string, int) { mut buf := malloc(maxbytes) nbytes := C.read(fd, buf, maxbytes) if nbytes < 0 { free(buf) return '', nbytes } unsafe { buf[nbytes] = 0 } return tos(buf, nbytes), nbytes }