+// +build linux,386 linux,amd64
+
+
+package termios
+
+import (
+ "os";
+ "syscall";
+ "unsafe"
+ "errors"
+)
+
+// termios types
+type cc_t byte
+type speed_t uint32
+type tcflag_t uint32
+
+// termios constants
+const (
+ IGNBRK = tcflag_t (0000001)
+ BRKINT = tcflag_t (0000002)
+ IGNPAR = tcflag_t (0000004)
+ PARMRK = tcflag_t (0000010)
+ INLCR = tcflag_t (0000100)
+ ECHONL = tcflag_t (0000100)
+ IGNCR = tcflag_t (0000200)
+ ICRNL = tcflag_t (0000400)
+ INPCK = tcflag_t (0000020)
+ ISTRIP = tcflag_t (0000040)
+ IXON = tcflag_t (0002000)
+ OPOST = tcflag_t (0000001)
+ CS8 = tcflag_t (0000060)
+ ECHO = tcflag_t (0000010)
+ ICANON = tcflag_t (0000002)
+ IEXTEN = tcflag_t (0100000)
+ ISIG = tcflag_t (0000001)
+ VTIME = tcflag_t (5)
+ VMIN = tcflag_t (6)
+ CBAUD = tcflag_t (0010017)
+ CBAUDEX = tcflag_t (0010000)
+)
+
+const (
+ B0 = speed_t(0000000) /* hang up */
+ B50 = speed_t(0000001)
+ B75 = speed_t(0000002)
+ B110 = speed_t(0000003)
+ B134 = speed_t(0000004)
+ B150 = speed_t(0000005)
+ B200 = speed_t(0000006)
+ B300 = speed_t(0000007)
+ B600 = speed_t(0000010)
+ B1200 = speed_t(0000011)
+ B1800 = speed_t(0000012)
+ B2400 = speed_t(0000013)
+ B4800 = speed_t(0000014)
+ B9600 = speed_t(0000015)
+ B19200 = speed_t(0000016)
+ B38400 = speed_t(0000017)
+ B57600 = speed_t(0010001)
+ B115200 = speed_t(0010002)
+ B230400 = speed_t(0010003)
+ B460800 = speed_t(0010004)
+ B500000 = speed_t(0010005)
+ B576000 = speed_t(0010006)
+ B921600 = speed_t(0010007)
+ B1000000 = speed_t(0010010)
+ B1152000 = speed_t(0010011)
+ B1500000 = speed_t(0010012)
+ B2000000 = speed_t(0010013)
+ B2500000 = speed_t(0010014)
+ B3000000 = speed_t(0010015)
+ B3500000 = speed_t(0010016)
+ B4000000 = speed_t(0010017)
+)
+
+//note that struct termios and struct __kernel_termios have DIFFERENT size and layout !!!
+const NCCS = 19 //23 on mips, 19 on alpha (also line and cc reversed), 19 on powerpc (also line and cc reversed), 17 on sparc,
+type termios struct {
+ c_iflag, c_oflag, c_cflag, c_lflag tcflag_t
+ c_line cc_t
+ c_cc [NCCS]cc_t
+ //~ c_ispeed, c_ospeed speed_t //unused in kernel on x86 apparently
+}
+
+// ioctl constants
+const (
+ TCGETS = 0x5401
+ TCSETS = 0x5402
+)
+
+func getTermios(ttyfd uintptr, dst *termios) error {
+ r1, _, errno := syscall.Syscall (syscall.SYS_IOCTL,
+ uintptr (ttyfd), uintptr (TCGETS),
+ uintptr (unsafe.Pointer (dst)));
+
+ if err := os.NewSyscallError ("SYS_IOCTL", errno); errno!=0 && err != nil {
+ return err
+ }
+
+ if r1 != 0 {
+ // return errors.New("Error")
+ }
+ return nil
+}
+
+func setTermios(ttyfd uintptr, src *termios) error {
+ r1, _, errno := syscall.Syscall (syscall.SYS_IOCTL,
+ uintptr (ttyfd), uintptr (TCSETS),
+ uintptr (unsafe.Pointer (src)));
+
+ if err := os.NewSyscallError ("SYS_IOCTL", errno); errno!=0 &&err != nil {
+ return err
+ }
+
+ if r1 != 0 {
+ return errors.New ("Error during ioctl tcsets syscall")
+ }
+ return nil
+}
+
+func SetRawFd(fd uintptr) (error) {
+ var orig_termios termios;
+ if err := getTermios (fd, &orig_termios); err != nil { return err}
+
+ orig_termios.c_iflag &= ^(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
+ orig_termios.c_oflag &= ^(OPOST);
+ orig_termios.c_lflag &= ^(ECHO | ECHONL | ICANON | IEXTEN | ISIG);
+ orig_termios.c_cflag |= (CS8);
+
+ orig_termios.c_cc[VMIN] = 1;
+ orig_termios.c_cc[VTIME] = 0;
+
+ return setTermios(fd, &orig_termios)
+}
+
+func SetRawFile(f *os.File) (error) {
+ return SetRawFd(f.Fd())
+}
+
+func SetSpeedFd(fd uintptr, speed speed_t) (err error) {
+ var orig_termios termios;
+ if err = getTermios (fd, &orig_termios); err != nil { return }
+
+ //~ orig_termios.c_ispeed = speed
+ //~ orig_termios.c_ospeed = speed
+ //input baudrate == output baudrate and we ignore special case B0
+ orig_termios.c_cflag &= ^(CBAUD | CBAUDEX)
+ orig_termios.c_cflag |= tcflag_t(speed)
+ if err = setTermios(fd, &orig_termios); err != nil { return }
+ //~ if err = getTermios (fd, &orig_termios); err != nil { return }
+ //~ if orig_termios.c_ispeed != speed || orig_termios.c_ospeed != speed {
+ //~ err = errors.New("Failed to set speed")
+ //~ }
+ if err = getTermios (fd, &orig_termios); err != nil { return }
+ if orig_termios.c_cflag & (CBAUD | CBAUDEX) != tcflag_t(speed) {
+ err = errors.New("Failed to set speed")
+ }
+ return
+}
+
+func SetSpeedFile(f *os.File, speed speed_t) (error) {
+ return SetSpeedFd(f.Fd(), speed)
+}
\ No newline at end of file