First commit (NetBSD 9.1)

1 files changed, 153 insertions, 0 deletions

diff --git a/tty.c b/tty.c
new file mode 100644
index 0000000..d106b3e
--- /dev/null
+++ b/tty.c
@@ -0,0 +1,153 @@
+/*	$NetBSD: tty.c,v 1.9 2017/06/30 04:41:19 kamil Exp $	*/
+
+#include <sys/cdefs.h>
+
+#ifndef lint
+__RCSID("$NetBSD: tty.c,v 1.9 2017/06/30 04:41:19 kamil Exp $");
+#endif
+
+#include <sys/stat.h>
+
+#include "sh.h"
+#define EXTERN
+#include "tty.h"
+#undef EXTERN
+
+int
+get_tty(fd, ts)
+	int fd;
+	TTY_state *ts;
+{
+	int ret;
+
+# ifdef HAVE_TERMIOS_H
+	ret = tcgetattr(fd, ts);
+# else /* HAVE_TERIOS_H */
+#  ifdef HAVE_TERMIO_H
+	ret = ioctl(fd, TCGETA, ts);
+#  else /* HAVE_TERMIO_H */
+	ret = ioctl(fd, TIOCGETP, &ts->sgttyb);
+#   ifdef TIOCGATC
+	if (ioctl(fd, TIOCGATC, &ts->lchars) < 0)
+		ret = -1;
+#   else
+	if (ioctl(fd, TIOCGETC, &ts->tchars) < 0)
+		ret = -1;
+#    ifdef TIOCGLTC
+	if (ioctl(fd, TIOCGLTC, &ts->ltchars) < 0)
+		ret = -1;
+#    endif /* TIOCGLTC */
+#   endif /* TIOCGATC */
+#  endif /* HAVE_TERMIO_H */
+# endif /* HAVE_TERIOS_H */
+	return ret;
+}
+
+int
+set_tty(fd, ts, flags)
+	int fd;
+	TTY_state *ts;
+	int flags;
+{
+	int ret = 0;
+
+# ifdef HAVE_TERMIOS_H
+	ret = tcsetattr(fd, TCSADRAIN, ts);
+# else /* HAVE_TERIOS_H */
+#  ifdef HAVE_TERMIO_H
+#   ifndef TCSETAW				/* e.g. Cray-2 */
+		/* first wait for output to drain */
+#    ifdef TCSBRK
+		if (ioctl(tty_fd, TCSBRK, 1) < 0)
+			ret = -1;
+#    else /* the following kludge is minimally intrusive, but sometimes fails */
+		if (flags & TF_WAIT)
+			sleep((unsigned)1);	/* fake it */
+#    endif
+#   endif /* !TCSETAW */
+#   if defined(_BSD_SYSV) || !defined(TCSETAW)
+/* _BSD_SYSV must force TIOCSETN instead of TIOCSETP (preserve type-ahead) */
+		if (ioctl(tty_fd, TCSETA, ts) < 0)
+			ret = -1;
+#   else
+		if (ioctl(tty_fd, TCSETAW, ts) < 0)
+			ret = -1;
+#   endif
+#  else /* HAVE_TERMIO_H */
+	    ret = ioctl(fd, TIOCSETN, &ts->sgttyb);
+#   ifdef TIOCGATC
+	if (ioctl(fd, TIOCSATC, &ts->lchars) < 0)
+		ret = -1;
+#   else
+	if (ioctl(fd, TIOCSETC, &ts->tchars) < 0)
+		ret = -1;
+#    ifdef TIOCGLTC
+	if (ioctl(fd, TIOCSLTC, &ts->ltchars) < 0)
+		ret = -1;
+#    endif /* TIOCGLTC */
+#   endif /* TIOCGATC */
+#  endif /* HAVE_TERMIO_H */
+# endif /* HAVE_TERIOS_H */
+	return ret;
+}
+
+
+/* Initialize tty_fd.  Used for saving/reseting tty modes upon
+ * foreground job completion and for setting up tty process group.
+ */
+void
+tty_init(init_ttystate)
+	int init_ttystate;
+{
+	int	do_close = 1;
+	int	tfd;
+	const char	*devtty = _PATH_TTY;
+
+	if (tty_fd >= 0) {
+		close(tty_fd);
+		tty_fd = -1;
+	}
+	tty_devtty = 1;
+
+	if ((tfd = open(devtty, O_RDWR, 0)) < 0) {
+		if (tfd < 0) {
+			tty_devtty = 0;
+			warningf(false,
+				"No controlling tty (open %s: %s)",
+				devtty, strerror(errno));
+		}
+	}
+
+	if (tfd < 0) {
+		do_close = 0;
+		if (isatty(0))
+			tfd = 0;
+		else if (isatty(2))
+			tfd = 2;
+		else {
+			warningf(false, "Can't find tty file descriptor");
+			return;
+		}
+	}
+	if ((tty_fd = ksh_dupbase(tfd, FDBASE)) < 0) {
+		warningf(false, "j_ttyinit: dup of tty fd failed: %s",
+			strerror(errno));
+	} else if (fd_clexec(tty_fd) < 0) {
+		warningf(false, "j_ttyinit: can't set close-on-exec flag: %s",
+			strerror(errno));
+		close(tty_fd);
+		tty_fd = -1;
+	} else if (init_ttystate)
+		get_tty(tty_fd, &tty_state);
+	if (do_close)
+		close(tfd);
+}
+
+void
+tty_close()
+{
+	if (tty_fd >= 0) {
+		close(tty_fd);
+		tty_fd = -1;
+	}
+}