text: /* from asm/termbits.h */
  
  #define TARGET_NCCS 19
  
  struct target_termios {
      unsigned int c_iflag;               /* input mode flags */
      unsigned int c_oflag;               /* output mode flags */
      unsigned int c_cflag;               /* control mode flags */
      unsigned int c_lflag;               /* local mode flags */
      unsigned char c_line;                    /* line discipline */
      unsigned char c_cc[TARGET_NCCS];                /* control characters */
  };
  
  /* c_iflag bits */
  #define TARGET_IGNBRK  0000001
  #define TARGET_BRKINT  0000002
  #define TARGET_IGNPAR  0000004
  #define TARGET_PARMRK  0000010
  #define TARGET_INPCK   0000020
  #define TARGET_ISTRIP  0000040
  #define TARGET_INLCR   0000100
  #define TARGET_IGNCR   0000200
  #define TARGET_ICRNL   0000400
  #define TARGET_IUCLC   0001000
  #define TARGET_IXON    0002000
  #define TARGET_IXANY   0004000
  #define TARGET_IXOFF   0010000
  #define TARGET_IMAXBEL 0020000
  #define TARGET_IUTF8   0040000
  
  /* c_oflag bits */
  #define TARGET_OPOST   0000001
  #define TARGET_OLCUC   0000002
  #define TARGET_ONLCR   0000004
  #define TARGET_OCRNL   0000010
  #define TARGET_ONOCR   0000020
  #define TARGET_ONLRET  0000040
  #define TARGET_OFILL   0000100
  #define TARGET_OFDEL   0000200
  #define TARGET_NLDLY   0000400
  #define   TARGET_NL0   0000000
  #define   TARGET_NL1   0000400
  #define TARGET_CRDLY   0003000
  #define   TARGET_CR0   0000000
  #define   TARGET_CR1   0001000
  #define   TARGET_CR2   0002000
  #define   TARGET_CR3   0003000
  #define TARGET_TABDLY  0014000
  #define   TARGET_TAB0  0000000
  #define   TARGET_TAB1  0004000
  #define   TARGET_TAB2  0010000
  #define   TARGET_TAB3  0014000
  #define   TARGET_XTABS 0014000
  #define TARGET_BSDLY   0020000
  #define   TARGET_BS0   0000000
  #define   TARGET_BS1   0020000
  #define TARGET_VTDLY   0040000
  #define   TARGET_VT0   0000000
  #define   TARGET_VT1   0040000
  #define TARGET_FFDLY   0100000
  #define   TARGET_FF0   0000000
  #define   TARGET_FF1   0100000
  
  /* c_cflag bit meaning */
  #define TARGET_CBAUD   0010017
  #define  TARGET_B0     0000000         /* hang up */
  #define  TARGET_B50    0000001
  #define  TARGET_B75    0000002
  #define  TARGET_B110   0000003
  #define  TARGET_B134   0000004
  #define  TARGET_B150   0000005
  #define  TARGET_B200   0000006
  #define  TARGET_B300   0000007
  #define  TARGET_B600   0000010
  #define  TARGET_B1200  0000011
  #define  TARGET_B1800  0000012
  #define  TARGET_B2400  0000013
  #define  TARGET_B4800  0000014
  #define  TARGET_B9600  0000015
  #define  TARGET_B19200 0000016
  #define  TARGET_B38400 0000017
  #define TARGET_EXTA B19200
  #define TARGET_EXTB B38400
  #define TARGET_CSIZE   0000060
  #define   TARGET_CS5   0000000
  #define   TARGET_CS6   0000020
  #define   TARGET_CS7   0000040
  #define   TARGET_CS8   0000060
  #define TARGET_CSTOPB  0000100
  #define TARGET_CREAD   0000200
  #define TARGET_PARENB  0000400
  #define TARGET_PARODD  0001000
  #define TARGET_HUPCL   0002000
  #define TARGET_CLOCAL  0004000
  #define TARGET_CBAUDEX 0010000
  #define  TARGET_B57600  0010001
  #define  TARGET_B115200 0010002
  #define  TARGET_B230400 0010003
  #define  TARGET_B460800 0010004
  #define  TARGET_B500000 0010005
  #define  TARGET_B576000 0010006
  #define  TARGET_B921600 0010007
  #define  TARGET_B1000000 0010010
  #define  TARGET_B1152000 0010011
  #define  TARGET_B1500000 0010012
  #define  TARGET_B2000000 0010013
  #define  TARGET_B2500000 0010014
  #define  TARGET_B3000000 0010015
  #define  TARGET_B3500000 0010016
  #define  TARGET_B4000000 0010017
  #define TARGET_CIBAUD    002003600000  /* input baud rate (not used) */
  #define TARGET_CMSPAR    010000000000  /* mark or space (stick) parity */
  #define TARGET_CRTSCTS   020000000000  /* flow control */
  
  /* c_lflag bits */
  #define TARGET_ISIG    0000001
  #define TARGET_ICANON  0000002
  #define TARGET_XCASE   0000004
  #define TARGET_ECHO    0000010
  #define TARGET_ECHOE   0000020
  #define TARGET_ECHOK   0000040
  #define TARGET_ECHONL  0000100
  #define TARGET_NOFLSH  0000200
  #define TARGET_TOSTOP  0000400
  #define TARGET_ECHOCTL 0001000
  #define TARGET_ECHOPRT 0002000
  #define TARGET_ECHOKE  0004000
  #define TARGET_FLUSHO  0010000
  #define TARGET_PENDIN  0040000
  #define TARGET_IEXTEN  0100000
  
  /* c_cc character offsets */
  #define TARGET_VINTR	0
  #define TARGET_VQUIT	1
  #define TARGET_VERASE	2
  #define TARGET_VKILL	3
  #define TARGET_VEOF	4
  #define TARGET_VTIME	5
  #define TARGET_VMIN	6
  #define TARGET_VSWTC	7
  #define TARGET_VSTART	8
  #define TARGET_VSTOP	9
  #define TARGET_VSUSP	10
  #define TARGET_VEOL	11
  #define TARGET_VREPRINT	12
  #define TARGET_VDISCARD	13
  #define TARGET_VWERASE	14
  #define TARGET_VLNEXT	15
  #define TARGET_VEOL2	16
  
  /* ioctls */
  
  #define TARGET_TCGETS		0x5401
  #define TARGET_TCSETS		0x5402
  #define TARGET_TCSETSW		0x5403
  #define TARGET_TCSETSF		0x5404
  #define TARGET_TCGETA		0x5405
  #define TARGET_TCSETA		0x5406
  #define TARGET_TCSETAW		0x5407
  #define TARGET_TCSETAF		0x5408
  #define TARGET_TCSBRK		0x5409
  #define TARGET_TCXONC		0x540A
  #define TARGET_TCFLSH		0x540B
  
  #define TARGET_TIOCEXCL	0x540C
  #define TARGET_TIOCNXCL	0x540D
  #define TARGET_TIOCSCTTY	0x540E
  #define TARGET_TIOCGPGRP	0x540F
  #define TARGET_TIOCSPGRP	0x5410
  #define TARGET_TIOCOUTQ	0x5411
  #define TARGET_TIOCSTI		0x5412
  #define TARGET_TIOCGWINSZ	0x5413
  #define TARGET_TIOCSWINSZ	0x5414
  #define TARGET_TIOCMGET	0x5415
  #define TARGET_TIOCMBIS	0x5416
  #define TARGET_TIOCMBIC	0x5417
  #define TARGET_TIOCMSET	0x5418
  #define TARGET_TIOCGSOFTCAR	0x5419
  #define TARGET_TIOCSSOFTCAR	0x541A
  #define TARGET_FIONREAD	0x541B
  #define TARGET_TIOCINQ		TARGET_FIONREAD
  #define TARGET_TIOCLINUX	0x541C
  #define TARGET_TIOCCONS	0x541D
  #define TARGET_TIOCGSERIAL	0x541E
  #define TARGET_TIOCSSERIAL	0x541F
  #define TARGET_TIOCPKT		0x5420
  #define TARGET_FIONBIO		0x5421
  #define TARGET_TIOCNOTTY	0x5422
  #define TARGET_TIOCSETD	0x5423
  #define TARGET_TIOCGETD	0x5424
  #define TARGET_TCSBRKP		0x5425	/* Needed for POSIX tcsendbreak() */
  #define TARGET_TIOCTTYGSTRUCT	0x5426  /* For debugging only */
  #define TARGET_TIOCSBRK	0x5427  /* BSD compatibility */
  #define TARGET_TIOCCBRK	0x5428  /* BSD compatibility */
  #define TARGET_TIOCGSID	0x5429  /* Return the session ID of FD */
  #define TARGET_TIOCGPTN	TARGET_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
  #define TARGET_TIOCSPTLCK	TARGET_IOW('T',0x31, int)  /* Lock/unlock Pty */
  
  #define TARGET_FIONCLEX	0x5450  /* these numbers need to be adjusted. */
  #define TARGET_FIOCLEX		0x5451
  #define TARGET_FIOASYNC	0x5452
  #define TARGET_TIOCSERCONFIG	0x5453
  #define TARGET_TIOCSERGWILD	0x5454
  #define TARGET_TIOCSERSWILD	0x5455
  #define TARGET_TIOCGLCKTRMIOS	0x5456
  #define TARGET_TIOCSLCKTRMIOS	0x5457
  #define TARGET_TIOCSERGSTRUCT	0x5458 /* For debugging only */
  #define TARGET_TIOCSERGETLSR   0x5459 /* Get line status register */
  #define TARGET_TIOCSERGETMULTI 0x545A /* Get multiport config  */
  #define TARGET_TIOCSERSETMULTI 0x545B /* Set multiport config */
  
  #define TARGET_TIOCMIWAIT	0x545C	/* wait for a change on serial input line(s) */
  #define TARGET_TIOCGICOUNT	0x545D	/* read serial port inline interrupt counts */
  #define TARGET_TIOCGHAYESESP   0x545E  /* Get Hayes ESP configuration */
  #define TARGET_TIOCSHAYESESP   0x545F  /* Set Hayes ESP configuration */
  
  /* Used for packet mode */
  #define TARGET_TIOCPKT_DATA		 0
  #define TARGET_TIOCPKT_FLUSHREAD	 1
  #define TARGET_TIOCPKT_FLUSHWRITE	 2
  #define TARGET_TIOCPKT_STOP		 4
  #define TARGET_TIOCPKT_START		 8
  #define TARGET_TIOCPKT_NOSTOP		16
  #define TARGET_TIOCPKT_DOSTOP		32
  
  #define TARGET_TIOCSER_TEMT    0x01	/* Transmitter physically empty */
  