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sttyv6(7)							     sttyv6(7)

NAME
       sttyv6: stty - terminal interface for Version 6/PWB compatibility

DESCRIPTION
       These  routines attempt to map the UNIX Time-Sharing System, Sixth Edi‐
       tion (Version 6), and PWB stty and gtty calls into the  current	ioctls
       that  perform  the same functions.  The mapping cannot be perfect.  The
       way the features are translated is described below.  The reader	should
       be familiar with before studying this entry.

       The following data structure is defined in the include file

	      struct sgttyb {
		   char	 sg_ispeed;  /* input speed */
		   char	 sg_ospeed;  /* output speed */
		   char	 sg_erase;   /* erase character */
		   char	 sg_kill;    /* kill character */
		   int	sg_flags;    /* mode flags */
	      }

       The flags, as defined in sgtty.h, are:

	   define HUPCL
	   define XTABS
	   define LCASE
	   define ECHO
	   define CRMOD
	   define RAW
	   define ODDP
	   define EVENP
	   define ANYP
	   define NLDELAY
	   define TBDELAY
	   define CRDELAY
	   define VTDELAY
	   define BSDELAY

	   define CR0
	   define CR1
	   define CR2
	   define CR3
	   define NL0
	   define NL1
	   define NL2
	   define NL3
	   define TAB0
	   define TAB1
	   define NOAL
	   define FF0
	   define FF1
	   define BS0
	   define BS1

       When the command (ioctl is executed, the flags in the old structure are
       mapped into their new equivalents in the structure.  Then  the  command
       is executed.

       The  following  table  shows  the mapping between the old flags and the
       current flags.  Note that flags contained in the structure that are not
       mentioned below are cleared.

       HUPCL (if set) sets the termio HUPCL flag;
       HUPCL (if clear) clears the termio HUPCL flag;
       XTABS (if set) sets the termio TAB3 flag;
       XTABS (if clear) clears the termio TAB3 flag;
       TBDELAY (if set) sets the termio TAB1 flag;
       TBDELAY (if clear) clears the termio TAB1 flag;
       LCASE (if set) sets the termio IUCLC, OLCUC, and XCASE flags;
       LCASE (if clear) clears the termio IUCLC, OLCUC, and XCASE flags;
       ECHO (if set) sets the termio ECHO flag;
       ECHO (if clear) clears the termio ECHO flag;
       NOAL (if set) sets the termio ECHOK flag;
       NOAL (if clear) clears the termio ECHOK flag;
       CRMOD (if set) sets the termio ICRNL and ONLCR
	    flags; also, if CR1 is set, the termio CR1 flag is set, and if CR2
	    is set, the termio ONOCR and CR2 flags are set;
       CRMOD (if clear)
	    sets the termio ONLRET flag; also, if NL1 is set, the  termio  CR1
	    flag is set, and if NL2 is set, the termio CR2 flag is set;
       RAW (if set) sets the termio
	    CS8	 flag,	and  clears  the  termio  ICRNL and IUCLC flags; also,
	    default values of 6 characters and 0.1 seconds are assigned to MIN
	    and TIME, respectively;
       RAW (if clear) sets the termio
	    BRKINT,  IGNPAR,  ISTRIP, IXON, IXANY, OPOST, CS7, PARENB, ICANON,
	    and ISIG flags; also, the default values control-D	and  null  are
	    assigned to the control characters EOF and EOL, respectively;
       ODDP (if set) if EVENP is also set, clears the termio
	    INPCK flag; otherwise, sets the termio PARODD flag;
       VTDELAY (if set) sets the termio FFDLY flag;
       VTDELAY (if clear) clears the termio FFDLY flag;
       BSDELAY (if set) sets the termio BSDLY flag;
       BSDELAY (if clear) clears the termio BSDLY flag.

       In  addition,  the  CREAD bit is set, and, if the baud rate is 110, the
       CSTOPB bit is set.

       When using the ispeed entry in the structure is mapped into the	appro‐
       priate speed in the CBAUD field.	 The erase and kill entries are mapped
       into the erase and kill characters.

       When the (ioctl command is executed, the	 command  is  first  executed.
       The  resulting  structure  is  then mapped into the structure, which is
       then returned to the user.

       The following table shows how the flags are mapped into the old	struc‐
       ture.  Note that all flags contained in the structure that are not men‐
       tioned below are cleared.

       HUPCL (if set) sets the sgttyb HUPCL flag;
       HUPCL (if clear) clears the sgttyb HUPCL flag;
       ICANON (if set) sets the sgttyb RAW flag;
       ICANON (if clear) clears the sgttyb RAW flag;
       XCASE (if set) sets the sgttyb LCASE flag;
       XCASE (if clear) clears the sgttyb LCASE flag;
       ECHO (if set) sets the sgttyb ECHO flag;
       ECHO (if clear) clears the sgttyb ECHO flag;
       ECHOK (if set) sets the sgttyb NOAL flag;
       ECHOK (if clear) clears the sgttyb NOAL flag;
       PARODD (if set) sets the sgttyb ODDP flag;
       PARODD (if clear) clears the sgttyb ODDP flag;
       INPCK (if set) sets the sgttyb EVENP flag;
       PARODD, INPCK (if both clear) sets the sgttyb
	    ODDP and EVENP flags;
       ONLCR (if set) sets the sgttyb
	    CRMOD flag; also, if CR1 is set, the sgttyb CR1 flag is  set,  and
	    if CR2 is set, the sgttyb CR2 flag is set;
       ONLCR (if clear) if CR1 is set, the sgttyb
	    NL1 flag is set, and if CR2 is set, the sgttyb NL2 flag is set;
       TAB3 (if set) sets the sgttyb XTABS flag;
       TAB3 (if clear) clears the sgttyb XTABS flag;
       TAB1 (if set) sets the sgttyb TBDELAY flag;
       TAB1 (if clear) clears the sgttyb TBDELAY flag;
       FFDLY (if set) sets the sgttyb VTDELAY flag;
       FFDLY (if clear) clears the sgttyb VTDELAY flag;
       BSDLY (if set) sets the sgttyb BSDELAY flag;
       BSDLY (if clear) clears the sgttyb BSDELAY flag.

       When using the CBAUD field is mapped into the ispeed and ospeed entries
       of the structure.  Also, the erase and kill characters are mapped  into
       the erase and kill entries.

       Note  that,  since  there  is  not a one-to-one mapping between the and
       structures, unexpected results may  occur  when	using  the  older  and
       calls.	Thus,  the  and calls should be replaced in all future code by
       the current equivalents, and respectively.

WARNINGS
       These facilities are included to aid in conversion of old programs, and
       should  not  be	used in new code.  Use the interface described in Note
       that these conversions do work for programs ported from UNIX Time-Shar‐
       ing  System,  Seventh  Edition  (Version	 7), because some V7 flags are
       defined differently.

SEE ALSO
       stty(2), termio(7).

								     sttyv6(7)
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