1 files changed, 284 insertions, 0 deletions
diff --git a/lib/sh/shtty.c b/lib/sh/shtty.c
new file mode 100644
index 0000000..15cc82f
--- /dev/null
+++ b/lib/sh/shtty.c
@@ -0,0 +1,284 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash is free software; you can redistribute it and/or modify it under
+   the terms of the GNU General Public License as published by the Free
+   Software Foundation; either version 2, or (at your option) any later
+   version.
+
+   Bash is distributed in the hope that it will be useful, but WITHOUT ANY
+   WARRANTY; without even the implied warranty of MERCHANTABILITY or
+   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with Bash; see the file COPYING.  If not, write to the Free Software
+   Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+
+/*
+ * shtty.c -- abstract interface to the terminal, focusing on capabilities.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#  include <unistd.h>
+#endif
+
+#include <shtty.h>
+
+static TTYSTRUCT ttin, ttout;
+static int ttsaved = 0;
+
+int
+ttgetattr(fd, ttp)
+int	fd;
+TTYSTRUCT *ttp;
+{
+#ifdef TERMIOS_TTY_DRIVER
+  return tcgetattr(fd, ttp);
+#else
+#  ifdef TERMIO_TTY_DRIVER
+  return ioctl(fd, TCGETA, ttp);
+#  else
+  return ioctl(fd, TIOCGETP, ttp);
+#  endif
+#endif
+}
+
+int
+ttsetattr(fd, ttp)
+int	fd;
+TTYSTRUCT *ttp;
+{
+#ifdef TERMIOS_TTY_DRIVER
+  return tcsetattr(fd, TCSADRAIN, ttp);
+#else
+#  ifdef TERMIO_TTY_DRIVER
+  return ioctl(fd, TCSETAW, ttp);
+#  else
+  return ioctl(fd, TIOCSETN, ttp);
+#  endif
+#endif
+}
+
+void
+ttsave()
+{
+  if (ttsaved)
+   return;
+  ttgetattr (0, &ttin);
+  ttgetattr (1, &ttout);
+  ttsaved = 1;
+}
+
+void
+ttrestore()
+{
+  if (ttsaved == 0)
+    return;
+  ttsetattr (0, &ttin);
+  ttsetattr (1, &ttout);
+  ttsaved = 0;
+}
+
+/* Retrieve the attributes associated with tty fd FD. */
+TTYSTRUCT *
+ttattr (fd)
+     int fd;
+{
+  if (ttsaved == 0)
+    return ((TTYSTRUCT *)0);
+  if (fd == 0)
+    return &ttin;
+  else if (fd == 1)
+    return &ttout;
+  else
+    return ((TTYSTRUCT *)0);
+}
+
+/*
+ * Change attributes in ttp so that when it is installed using
+ * ttsetattr, the terminal will be in one-char-at-a-time mode.
+ */
+int
+tt_setonechar(ttp)
+     TTYSTRUCT *ttp;
+{
+#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)
+
+  /* XXX - might not want this -- it disables erase and kill processing. */
+  ttp->c_lflag &= ~ICANON;
+
+  ttp->c_lflag |= ISIG;
+#  ifdef IEXTEN
+  ttp->c_lflag |= IEXTEN;
+#  endif
+
+  ttp->c_iflag |= ICRNL;	/* make sure we get CR->NL on input */
+  ttp->c_iflag &= ~INLCR;	/* but no NL->CR */
+
+#  ifdef OPOST
+  ttp->c_oflag |= OPOST;
+#  endif
+#  ifdef ONLCR
+  ttp->c_oflag |= ONLCR;
+#  endif
+#  ifdef OCRNL
+  ttp->c_oflag &= ~OCRNL;
+#  endif
+#  ifdef ONOCR
+  ttp->c_oflag &= ~ONOCR;
+#  endif
+#  ifdef ONLRET
+  ttp->c_oflag &= ~ONLRET;
+#  endif
+
+  ttp->c_cc[VMIN] = 1;
+  ttp->c_cc[VTIME] = 0;
+
+#else
+
+  ttp->sg_flags |= CBREAK;
+
+#endif
+
+  return 0;
+}
+
+/* Set the terminal into one-character-at-a-time mode */
+int
+ttonechar ()
+{
+  TTYSTRUCT tt;
+
+  if (ttsaved == 0)
+    return -1;
+  tt = ttin;
+  if (tt_setonechar(&tt) < 0)
+    return -1;
+  return (ttsetattr (0, &tt));
+}
+
+/*
+ * Change attributes in ttp so that when it is installed using
+ * ttsetattr, the terminal will be in no-echo mode.
+ */
+int
+tt_setnoecho(ttp)
+     TTYSTRUCT *ttp;
+{
+#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)
+  ttp->c_lflag &= ~(ECHO|ECHOK|ECHONL);
+#else
+  ttp->sg_flags &= ~ECHO;
+#endif
+
+  return 0;
+}
+
+/* Set the terminal into no-echo mode */
+int
+ttnoecho ()
+{
+  TTYSTRUCT tt;
+
+  if (ttsaved == 0)
+    return -1;
+  tt = ttin;
+  if (tt_setnoecho (&tt) < 0)
+    return -1;
+  return (ttsetattr (0, &tt));
+}
+
+/*
+ * Change attributes in ttp so that when it is installed using
+ * ttsetattr, the terminal will be in eight-bit mode (pass8).
+ */
+int
+tt_seteightbit (ttp)
+     TTYSTRUCT *ttp;
+{
+#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)
+  ttp->c_iflag &= ~ISTRIP;
+  ttp->c_cflag |= CS8;
+  ttp->c_cflag &= ~PARENB;
+#else
+  ttp->sg_flags |= ANYP;
+#endif
+
+  return 0;
+}
+
+/* Set the terminal into eight-bit mode */
+int
+tteightbit ()
+{
+  TTYSTRUCT tt;
+
+  if (ttsaved == 0)
+    return -1;
+  tt = ttin;
+  if (tt_seteightbit (&tt) < 0)
+    return -1;
+  return (ttsetattr (0, &tt));
+}
+
+/*
+ * Change attributes in ttp so that when it is installed using
+ * ttsetattr, the terminal will be in non-canonical input mode.
+ */
+int
+tt_setnocanon (ttp)
+     TTYSTRUCT *ttp;
+{
+#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)
+  ttp->c_lflag &= ~ICANON;
+#endif
+
+  return 0;
+}
+
+/* Set the terminal into non-canonical mode */
+int
+ttnocanon ()
+{
+  TTYSTRUCT tt;
+
+  if (ttsaved == 0)
+    return -1;
+  tt = ttin;
+  if (tt_setnocanon (&tt) < 0)
+    return -1;
+  return (ttsetattr (0, &tt));
+}
+
+/*
+ * Change attributes in ttp so that when it is installed using
+ * ttsetattr, the terminal will be in cbreak, no-echo mode.
+ */
+int
+tt_setcbreak(ttp)
+     TTYSTRUCT *ttp;
+{
+  if (tt_setonechar (ttp) < 0)
+    return -1;
+  return (tt_setnoecho (ttp));
+}
+
+/* Set the terminal into cbreak (no-echo, one-character-at-a-time) mode */
+int
+ttcbreak ()
+{
+  TTYSTRUCT tt;
+
+  if (ttsaved == 0)
+    return -1;
+  tt = ttin;
+  if (tt_setcbreak (&tt) < 0)
+    return -1;
+  return (ttsetattr (0, &tt));
+}