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#include "sh.h"
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#include "ksh_stat.h"
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#define EXTERN
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#include "tty.h"
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#undef EXTERN
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int
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get_tty(fd, ts)
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	int fd;
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	TTY_state *ts;
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{
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	int ret;
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# ifdef HAVE_TERMIOS_H
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	ret = tcgetattr(fd, ts);
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# else /* HAVE_TERIOS_H */
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#  ifdef HAVE_TERMIO_H
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	ret = ioctl(fd, TCGETA, ts);
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#  else /* HAVE_TERMIO_H */
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	ret = ioctl(fd, TIOCGETP, &ts->sgttyb);
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#   ifdef TIOCGATC
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	if (ioctl(fd, TIOCGATC, &ts->lchars) < 0)
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		ret = -1;
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#   else
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	if (ioctl(fd, TIOCGETC, &ts->tchars) < 0)
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		ret = -1;
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#    ifdef TIOCGLTC
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	if (ioctl(fd, TIOCGLTC, &ts->ltchars) < 0)
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		ret = -1;
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#    endif /* TIOCGLTC */
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#   endif /* TIOCGATC */
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#  endif /* HAVE_TERMIO_H */
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# endif /* HAVE_TERIOS_H */
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	return ret;
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}
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int
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set_tty(fd, ts, flags)
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	int fd;
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	TTY_state *ts;
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	int flags;
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{
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	int ret = 0;
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# ifdef HAVE_TERMIOS_H
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	ret = tcsetattr(fd, TCSADRAIN, ts);
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# else /* HAVE_TERIOS_H */
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#  ifdef HAVE_TERMIO_H
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#   ifndef TCSETAW				/* e.g. Cray-2 */
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		/* first wait for output to drain */
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#    ifdef TCSBRK
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		if (ioctl(tty_fd, TCSBRK, 1) < 0)
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			ret = -1;
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#    else /* the following kludge is minimally intrusive, but sometimes fails */
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		if (flags & TF_WAIT)
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			sleep((unsigned)1);	/* fake it */
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#    endif
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#   endif /* !TCSETAW */
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#   if defined(_BSD_SYSV) || !defined(TCSETAW)
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/* _BSD_SYSV must force TIOCSETN instead of TIOCSETP (preserve type-ahead) */
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		if (ioctl(tty_fd, TCSETA, ts) < 0)
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			ret = -1;
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#   else
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		if (ioctl(tty_fd, TCSETAW, ts) < 0)
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			ret = -1;
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#   endif
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#  else /* HAVE_TERMIO_H */
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#   if defined(__mips) && (defined(_SYSTYPE_BSD43) || defined(__SYSTYPE_BSD43))
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	/* Under RISC/os 5.00, bsd43 environment, after a tty driver
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	 * generated interrupt (eg, INTR, TSTP), all output to tty is
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	 * lost until a SETP is done (there must be a better way of
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	 * doing this...).
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	 */
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	if (flags & TF_MIPSKLUDGE)
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		ret = ioctl(fd, TIOCSETP, &ts->sgttyb);
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	else
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#   endif /* _SYSTYPE_BSD43 */
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	    ret = ioctl(fd, TIOCSETN, &ts->sgttyb);
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#   ifdef TIOCGATC
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	if (ioctl(fd, TIOCSATC, &ts->lchars) < 0)
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		ret = -1;
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#   else
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	if (ioctl(fd, TIOCSETC, &ts->tchars) < 0)
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		ret = -1;
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#    ifdef TIOCGLTC
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	if (ioctl(fd, TIOCSLTC, &ts->ltchars) < 0)
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		ret = -1;
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#    endif /* TIOCGLTC */
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#   endif /* TIOCGATC */
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#  endif /* HAVE_TERMIO_H */
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# endif /* HAVE_TERIOS_H */
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	return ret;
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}
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/* Initialize tty_fd.  Used for saving/reseting tty modes upon
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 * foreground job completion and for setting up tty process group.
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 */
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void
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tty_init(init_ttystate)
101 
	int init_ttystate;
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{
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	int	do_close = 1;
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	int	tfd;
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106 
	if (tty_fd >= 0) {
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		close(tty_fd);
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		tty_fd = -1;
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	}
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	tty_devtty = 1;
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112 
	/* SCO can't job control on /dev/tty, so don't try... */
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#if !defined(__SCO__) && !defined(PLAN9)
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	if ((tfd = open("/dev/tty", O_RDWR, 0)) < 0) {
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#ifdef __NeXT
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		/* rlogin on NeXT boxes does not set up the controlling tty,
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		 * so force it to be done here...
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		 */
119 
		{
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			extern char *ttyname ARGS((int));
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			char *s = ttyname(isatty(2) ? 2 : 0);
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			int fd;
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124 
			if (s && (fd = open(s, O_RDWR, 0)) >= 0) {
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				close(fd);
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				tfd = open("/dev/tty", O_RDWR, 0);
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			}
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		}
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#endif /* __NeXT */
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/* X11R5 xterm on mips doesn't set controlling tty properly - temporary hack */
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# if !defined(__mips) || !(defined(_SYSTYPE_BSD43) || defined(__SYSTYPE_BSD43))
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		if (tfd < 0) {
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			tty_devtty = 0;
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			warningf(FALSE,
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				"No controlling tty (open /dev/tty: %s)",
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				strerror(errno));
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		}
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# endif /* __mips  */
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	}
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#else /* !__SCO__ */
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	tfd = -1;
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#endif /* __SCO__ */
144 
 
145 
	if (tfd < 0) {
146 
		do_close = 0;
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		if (isatty(0))
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			tfd = 0;
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		else if (isatty(2))
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			tfd = 2;
151 
		else {
152 
			warningf(FALSE, "Can't find tty file descriptor");
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			return;
154 
		}
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	}
156 
	if ((tty_fd = ksh_dupbase(tfd, FDBASE)) < 0) {
157 
		warningf(FALSE, "j_ttyinit: dup of tty fd failed: %s",
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			strerror(errno));
159 
	} else if (fd_clexec(tty_fd) < 0) {
160 
		warningf(FALSE, "j_ttyinit: can't set close-on-exec flag: %s",
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			strerror(errno));
162 
		close(tty_fd);
163 
		tty_fd = -1;
164 
	} else if (init_ttystate)
165 
		get_tty(tty_fd, &tty_state);
166 
	if (do_close)
167 
		close(tfd);
168 
}
169 
 
170 
void
171 
tty_close()
172 
{
173 
	if (tty_fd >= 0) {
174 
		close(tty_fd);
175 
		tty_fd = -1;
176 
	}
177 
}