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-rw-r--r--readline/rltty.c728
1 files changed, 728 insertions, 0 deletions
diff --git a/readline/rltty.c b/readline/rltty.c
new file mode 100644
index 0000000..8312963
--- /dev/null
+++ b/readline/rltty.c
@@ -0,0 +1,728 @@
+/* rltty.c -- functions to prepare and restore the terminal for readline's
+ use. */
+
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+
+ This file is part of the GNU Readline Library, a library for
+ reading lines of text with interactive input and history editing.
+
+ The GNU Readline Library 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 1, or
+ (at your option) any later version.
+
+ The GNU Readline Library 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.
+
+ The GNU General Public License is often shipped with GNU software, and
+ is generally kept in a file called COPYING or LICENSE. If you do not
+ have a copy of the license, write to the Free Software Foundation,
+ 675 Mass Ave, Cambridge, MA 02139, USA. */
+#define READLINE_LIBRARY
+
+#if defined (HAVE_CONFIG_H)
+# include <config.h>
+#endif
+
+#include <sys/types.h>
+#include <signal.h>
+#include <errno.h>
+#include <stdio.h>
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+
+#include "rldefs.h"
+
+#if !defined (SHELL) && defined (GWINSZ_IN_SYS_IOCTL)
+# include <sys/ioctl.h>
+#endif /* !SHELL && GWINSZ_IN_SYS_IOCTL */
+
+#include "rltty.h"
+#include "readline.h"
+
+#if !defined (errno)
+extern int errno;
+#endif /* !errno */
+
+extern int readline_echoing_p;
+extern int _rl_eof_char;
+
+extern int _rl_enable_keypad, _rl_enable_meta;
+
+extern void _rl_control_keypad ();
+
+#if defined (__GO32__)
+# include <pc.h>
+# undef HANDLE_SIGNALS
+#endif /* __GO32__ */
+
+/* Indirect functions to allow apps control over terminal management. */
+extern void rl_prep_terminal (), rl_deprep_terminal ();
+
+VFunction *rl_prep_term_function = rl_prep_terminal;
+VFunction *rl_deprep_term_function = rl_deprep_terminal;
+
+/* **************************************************************** */
+/* */
+/* Signal Management */
+/* */
+/* **************************************************************** */
+
+#if defined (HAVE_POSIX_SIGNALS)
+static sigset_t sigint_set, sigint_oset;
+#else /* !HAVE_POSIX_SIGNALS */
+# if defined (HAVE_BSD_SIGNALS)
+static int sigint_oldmask;
+# endif /* HAVE_BSD_SIGNALS */
+#endif /* !HAVE_POSIX_SIGNALS */
+
+static int sigint_blocked;
+
+/* Cause SIGINT to not be delivered until the corresponding call to
+ release_sigint(). */
+static void
+block_sigint ()
+{
+ if (sigint_blocked)
+ return;
+
+#if defined (HAVE_POSIX_SIGNALS)
+ sigemptyset (&sigint_set);
+ sigemptyset (&sigint_oset);
+ sigaddset (&sigint_set, SIGINT);
+ sigprocmask (SIG_BLOCK, &sigint_set, &sigint_oset);
+#else /* !HAVE_POSIX_SIGNALS */
+# if defined (HAVE_BSD_SIGNALS)
+ sigint_oldmask = sigblock (sigmask (SIGINT));
+# else /* !HAVE_BSD_SIGNALS */
+# if defined (HAVE_USG_SIGHOLD)
+ sighold (SIGINT);
+# endif /* HAVE_USG_SIGHOLD */
+# endif /* !HAVE_BSD_SIGNALS */
+#endif /* !HAVE_POSIX_SIGNALS */
+ sigint_blocked = 1;
+}
+
+/* Allow SIGINT to be delivered. */
+static void
+release_sigint ()
+{
+ if (!sigint_blocked)
+ return;
+
+#if defined (HAVE_POSIX_SIGNALS)
+ sigprocmask (SIG_SETMASK, &sigint_oset, (sigset_t *)NULL);
+#else
+# if defined (HAVE_BSD_SIGNALS)
+ sigsetmask (sigint_oldmask);
+# else /* !HAVE_BSD_SIGNALS */
+# if defined (HAVE_USG_SIGHOLD)
+ sigrelse (SIGINT);
+# endif /* HAVE_USG_SIGHOLD */
+# endif /* !HAVE_BSD_SIGNALS */
+#endif /* !HAVE_POSIX_SIGNALS */
+
+ sigint_blocked = 0;
+}
+
+/* **************************************************************** */
+/* */
+/* Saving and Restoring the TTY */
+/* */
+/* **************************************************************** */
+
+/* Non-zero means that the terminal is in a prepped state. */
+static int terminal_prepped;
+
+/* If non-zero, means that this process has called tcflow(fd, TCOOFF)
+ and output is suspended. */
+#if defined (__ksr1__)
+static int ksrflow;
+#endif
+
+#if !defined (SHELL) && defined (TIOCGWINSZ)
+/* Dummy call to force a backgrounded readline to stop before it tries
+ to get the tty settings. */
+static void
+set_winsize (tty)
+ int tty;
+{
+ struct winsize w;
+
+ if (ioctl (tty, TIOCGWINSZ, &w) == 0)
+ (void) ioctl (tty, TIOCSWINSZ, &w);
+}
+#else /* SHELL || !TIOCGWINSZ */
+# define set_winsize(tty)
+#endif /* SHELL || !TIOCGWINSZ */
+
+#if defined (NEW_TTY_DRIVER)
+
+/* Values for the `flags' field of a struct bsdtty. This tells which
+ elements of the struct bsdtty have been fetched from the system and
+ are valid. */
+#define SGTTY_SET 0x01
+#define LFLAG_SET 0x02
+#define TCHARS_SET 0x04
+#define LTCHARS_SET 0x08
+
+struct bsdtty {
+ struct sgttyb sgttyb; /* Basic BSD tty driver information. */
+ int lflag; /* Local mode flags, like LPASS8. */
+#if defined (TIOCGETC)
+ struct tchars tchars; /* Terminal special characters, including ^S and ^Q. */
+#endif
+#if defined (TIOCGLTC)
+ struct ltchars ltchars; /* 4.2 BSD editing characters */
+#endif
+ int flags; /* Bitmap saying which parts of the struct are valid. */
+};
+
+#define TIOTYPE struct bsdtty
+
+static TIOTYPE otio;
+
+static int
+get_tty_settings (tty, tiop)
+ int tty;
+ TIOTYPE *tiop;
+{
+ set_winsize (tty);
+
+ tiop->flags = tiop->lflag = 0;
+
+ ioctl (tty, TIOCGETP, &(tiop->sgttyb));
+ tiop->flags |= SGTTY_SET;
+
+#if defined (TIOCLGET)
+ ioctl (tty, TIOCLGET, &(tiop->lflag));
+ tiop->flags |= LFLAG_SET;
+#endif
+
+#if defined (TIOCGETC)
+ ioctl (tty, TIOCGETC, &(tiop->tchars));
+ tiop->flags |= TCHARS_SET;
+#endif
+
+#if defined (TIOCGLTC)
+ ioctl (tty, TIOCGLTC, &(tiop->ltchars));
+ tiop->flags |= LTCHARS_SET;
+#endif
+
+ return 0;
+}
+
+static int
+set_tty_settings (tty, tiop)
+ int tty;
+ TIOTYPE *tiop;
+{
+ if (tiop->flags & SGTTY_SET)
+ {
+ ioctl (tty, TIOCSETN, &(tiop->sgttyb));
+ tiop->flags &= ~SGTTY_SET;
+ }
+ readline_echoing_p = 1;
+
+#if defined (TIOCLSET)
+ if (tiop->flags & LFLAG_SET)
+ {
+ ioctl (tty, TIOCLSET, &(tiop->lflag));
+ tiop->flags &= ~LFLAG_SET;
+ }
+#endif
+
+#if defined (TIOCSETC)
+ if (tiop->flags & TCHARS_SET)
+ {
+ ioctl (tty, TIOCSETC, &(tiop->tchars));
+ tiop->flags &= ~TCHARS_SET;
+ }
+#endif
+
+#if defined (TIOCSLTC)
+ if (tiop->flags & LTCHARS_SET)
+ {
+ ioctl (tty, TIOCSLTC, &(tiop->ltchars));
+ tiop->flags &= ~LTCHARS_SET;
+ }
+#endif
+
+ return 0;
+}
+
+static void
+prepare_terminal_settings (meta_flag, otio, tiop)
+ int meta_flag;
+ TIOTYPE otio, *tiop;
+{
+#if !defined (__GO32__)
+ readline_echoing_p = (otio.sgttyb.sg_flags & ECHO);
+
+ /* Copy the original settings to the structure we're going to use for
+ our settings. */
+ tiop->sgttyb = otio.sgttyb;
+ tiop->lflag = otio.lflag;
+#if defined (TIOCGETC)
+ tiop->tchars = otio.tchars;
+#endif
+#if defined (TIOCGLTC)
+ tiop->ltchars = otio.ltchars;
+#endif
+ tiop->flags = otio.flags;
+
+ /* First, the basic settings to put us into character-at-a-time, no-echo
+ input mode. */
+ tiop->sgttyb.sg_flags &= ~(ECHO | CRMOD);
+ tiop->sgttyb.sg_flags |= CBREAK;
+
+ /* If this terminal doesn't care how the 8th bit is used, then we can
+ use it for the meta-key. If only one of even or odd parity is
+ specified, then the terminal is using parity, and we cannot. */
+#if !defined (ANYP)
+# define ANYP (EVENP | ODDP)
+#endif
+ if (((otio.sgttyb.sg_flags & ANYP) == ANYP) ||
+ ((otio.sgttyb.sg_flags & ANYP) == 0))
+ {
+ tiop->sgttyb.sg_flags |= ANYP;
+
+ /* Hack on local mode flags if we can. */
+#if defined (TIOCLGET)
+# if defined (LPASS8)
+ tiop->lflag |= LPASS8;
+# endif /* LPASS8 */
+#endif /* TIOCLGET */
+ }
+
+#if defined (TIOCGETC)
+# if defined (USE_XON_XOFF)
+ /* Get rid of terminal output start and stop characters. */
+ tiop->tchars.t_stopc = -1; /* C-s */
+ tiop->tchars.t_startc = -1; /* C-q */
+
+ /* If there is an XON character, bind it to restart the output. */
+ if (otio.tchars.t_startc != -1)
+ rl_bind_key (otio.tchars.t_startc, rl_restart_output);
+# endif /* USE_XON_XOFF */
+
+ /* If there is an EOF char, bind _rl_eof_char to it. */
+ if (otio.tchars.t_eofc != -1)
+ _rl_eof_char = otio.tchars.t_eofc;
+
+# if defined (NO_KILL_INTR)
+ /* Get rid of terminal-generated SIGQUIT and SIGINT. */
+ tiop->tchars.t_quitc = -1; /* C-\ */
+ tiop->tchars.t_intrc = -1; /* C-c */
+# endif /* NO_KILL_INTR */
+#endif /* TIOCGETC */
+
+#if defined (TIOCGLTC)
+ /* Make the interrupt keys go away. Just enough to make people happy. */
+ tiop->ltchars.t_dsuspc = -1; /* C-y */
+ tiop->ltchars.t_lnextc = -1; /* C-v */
+#endif /* TIOCGLTC */
+#endif /* !__GO32__ */
+}
+
+#else /* !defined (NEW_TTY_DRIVER) */
+
+#if !defined (VMIN)
+# define VMIN VEOF
+#endif
+
+#if !defined (VTIME)
+# define VTIME VEOL
+#endif
+
+#if defined (TERMIOS_TTY_DRIVER)
+# define TIOTYPE struct termios
+# define DRAIN_OUTPUT(fd) tcdrain (fd)
+# define GETATTR(tty, tiop) (tcgetattr (tty, tiop))
+# ifdef M_UNIX
+# define SETATTR(tty, tiop) (tcsetattr (tty, TCSANOW, tiop))
+# else
+# define SETATTR(tty, tiop) (tcsetattr (tty, TCSADRAIN, tiop))
+# endif /* !M_UNIX */
+#else
+# define TIOTYPE struct termio
+# define DRAIN_OUTPUT(fd)
+# define GETATTR(tty, tiop) (ioctl (tty, TCGETA, tiop))
+# define SETATTR(tty, tiop) (ioctl (tty, TCSETA, tiop))
+#endif /* !TERMIOS_TTY_DRIVER */
+
+static TIOTYPE otio;
+
+#if defined (FLUSHO)
+# define OUTPUT_BEING_FLUSHED(tp) (tp->c_lflag & FLUSHO)
+#else
+# define OUTPUT_BEING_FLUSHED(tp) 0
+#endif
+
+static void
+rltty_warning (msg)
+ char *msg;
+{
+ fprintf (stderr, "readline: warning: %s\n", msg);
+}
+
+#if defined (_AIX)
+void
+setopost(tp)
+TIOTYPE *tp;
+{
+ if ((tp->c_oflag & OPOST) == 0)
+ {
+ rltty_warning ("turning on OPOST for terminal\r");
+ tp->c_oflag |= OPOST|ONLCR;
+ }
+}
+#endif
+
+static int
+get_tty_settings (tty, tiop)
+ int tty;
+ TIOTYPE *tiop;
+{
+ int ioctl_ret;
+ set_winsize (tty);
+
+ while (1)
+ {
+ ioctl_ret = GETATTR (tty, tiop);
+ if (ioctl_ret < 0)
+ {
+ if (errno != EINTR)
+ return -1;
+ else
+ continue;
+ }
+ if (OUTPUT_BEING_FLUSHED (tiop))
+ {
+#if defined (FLUSHO) && defined (_AIX41)
+ rltty_warning ("turning off output flushing");
+ tiop->c_lflag &= ~FLUSHO;
+ break;
+#else
+ continue;
+#endif
+ }
+ break;
+ }
+
+#if defined (_AIX)
+ setopost(tiop);
+#endif
+
+ return 0;
+}
+
+static int
+set_tty_settings (tty, tiop)
+ int tty;
+ TIOTYPE *tiop;
+{
+ while (SETATTR (tty, tiop) < 0)
+ {
+ if (errno != EINTR)
+ return -1;
+ errno = 0;
+ }
+
+#if 0
+
+#if defined (TERMIOS_TTY_DRIVER)
+# if defined (__ksr1__)
+ if (ksrflow)
+ {
+ ksrflow = 0;
+ tcflow (tty, TCOON);
+ }
+# else /* !ksr1 */
+ tcflow (tty, TCOON); /* Simulate a ^Q. */
+# endif /* !ksr1 */
+#else
+ ioctl (tty, TCXONC, 1); /* Simulate a ^Q. */
+#endif /* !TERMIOS_TTY_DRIVER */
+
+#endif
+
+ return 0;
+}
+
+static void
+prepare_terminal_settings (meta_flag, otio, tiop)
+ int meta_flag;
+ TIOTYPE otio, *tiop;
+{
+ readline_echoing_p = (otio.c_lflag & ECHO);
+
+ tiop->c_lflag &= ~(ICANON | ECHO);
+
+ if ((unsigned char) otio.c_cc[VEOF] != (unsigned char) _POSIX_VDISABLE)
+ _rl_eof_char = otio.c_cc[VEOF];
+
+#if defined (USE_XON_XOFF)
+#if defined (IXANY)
+ tiop->c_iflag &= ~(IXON | IXOFF | IXANY);
+#else
+ /* `strict' Posix systems do not define IXANY. */
+ tiop->c_iflag &= ~(IXON | IXOFF);
+#endif /* IXANY */
+#endif /* USE_XON_XOFF */
+
+ /* Only turn this off if we are using all 8 bits. */
+ if (((tiop->c_cflag & CSIZE) == CS8) || meta_flag)
+ tiop->c_iflag &= ~(ISTRIP | INPCK);
+
+ /* Make sure we differentiate between CR and NL on input. */
+ tiop->c_iflag &= ~(ICRNL | INLCR);
+
+#if !defined (HANDLE_SIGNALS)
+ tiop->c_lflag &= ~ISIG;
+#else
+ tiop->c_lflag |= ISIG;
+#endif
+
+ tiop->c_cc[VMIN] = 1;
+ tiop->c_cc[VTIME] = 0;
+
+#if defined (FLUSHO)
+ if (OUTPUT_BEING_FLUSHED (tiop))
+ {
+ tiop->c_lflag &= ~FLUSHO;
+ otio.c_lflag &= ~FLUSHO;
+ }
+#endif
+
+ /* Turn off characters that we need on Posix systems with job control,
+ just to be sure. This includes ^Y and ^V. This should not really
+ be necessary. */
+#if defined (TERMIOS_TTY_DRIVER) && defined (_POSIX_VDISABLE)
+
+#if defined (VLNEXT)
+ tiop->c_cc[VLNEXT] = _POSIX_VDISABLE;
+#endif
+
+#if defined (VDSUSP)
+ tiop->c_cc[VDSUSP] = _POSIX_VDISABLE;
+#endif
+
+#endif /* TERMIOS_TTY_DRIVER && _POSIX_VDISABLE */
+}
+#endif /* NEW_TTY_DRIVER */
+
+/* Put the terminal in CBREAK mode so that we can detect key presses. */
+void
+rl_prep_terminal (meta_flag)
+ int meta_flag;
+{
+#if !defined (__GO32__)
+ int tty;
+ TIOTYPE tio;
+
+ if (terminal_prepped)
+ return;
+
+ /* Try to keep this function from being INTerrupted. */
+ block_sigint ();
+
+ tty = fileno (rl_instream);
+
+ if (get_tty_settings (tty, &tio) < 0)
+ {
+ release_sigint ();
+ return;
+ }
+
+ otio = tio;
+
+ prepare_terminal_settings (meta_flag, otio, &tio);
+
+ if (set_tty_settings (tty, &tio) < 0)
+ {
+ release_sigint ();
+ return;
+ }
+
+ if (_rl_enable_keypad)
+ _rl_control_keypad (1);
+
+ fflush (rl_outstream);
+ terminal_prepped = 1;
+
+ release_sigint ();
+#endif /* !__GO32__ */
+}
+
+/* Restore the terminal's normal settings and modes. */
+void
+rl_deprep_terminal ()
+{
+#if !defined (__GO32__)
+ int tty;
+
+ if (!terminal_prepped)
+ return;
+
+ /* Try to keep this function from being interrupted. */
+ block_sigint ();
+
+ tty = fileno (rl_instream);
+
+ if (_rl_enable_keypad)
+ _rl_control_keypad (0);
+
+ fflush (rl_outstream);
+
+ if (set_tty_settings (tty, &otio) < 0)
+ {
+ release_sigint ();
+ return;
+ }
+
+ terminal_prepped = 0;
+
+ release_sigint ();
+#endif /* !__GO32__ */
+}
+
+/* **************************************************************** */
+/* */
+/* Bogus Flow Control */
+/* */
+/* **************************************************************** */
+
+int
+rl_restart_output (count, key)
+ int count, key;
+{
+ int fildes = fileno (rl_outstream);
+#if defined (TIOCSTART)
+#if defined (apollo)
+ ioctl (&fildes, TIOCSTART, 0);
+#else
+ ioctl (fildes, TIOCSTART, 0);
+#endif /* apollo */
+
+#else /* !TIOCSTART */
+# if defined (TERMIOS_TTY_DRIVER)
+# if defined (__ksr1__)
+ if (ksrflow)
+ {
+ ksrflow = 0;
+ tcflow (fildes, TCOON);
+ }
+# else /* !ksr1 */
+ tcflow (fildes, TCOON); /* Simulate a ^Q. */
+# endif /* !ksr1 */
+# else /* !TERMIOS_TTY_DRIVER */
+# if defined (TCXONC)
+ ioctl (fildes, TCXONC, TCOON);
+# endif /* TCXONC */
+# endif /* !TERMIOS_TTY_DRIVER */
+#endif /* !TIOCSTART */
+
+ return 0;
+}
+
+int
+rl_stop_output (count, key)
+ int count, key;
+{
+ int fildes = fileno (rl_instream);
+
+#if defined (TIOCSTOP)
+# if defined (apollo)
+ ioctl (&fildes, TIOCSTOP, 0);
+# else
+ ioctl (fildes, TIOCSTOP, 0);
+# endif /* apollo */
+#else /* !TIOCSTOP */
+# if defined (TERMIOS_TTY_DRIVER)
+# if defined (__ksr1__)
+ ksrflow = 1;
+# endif /* ksr1 */
+ tcflow (fildes, TCOOFF);
+# else
+# if defined (TCXONC)
+ ioctl (fildes, TCXONC, TCOON);
+# endif /* TCXONC */
+# endif /* !TERMIOS_TTY_DRIVER */
+#endif /* !TIOCSTOP */
+
+ return 0;
+}
+
+/* **************************************************************** */
+/* */
+/* Default Key Bindings */
+/* */
+/* **************************************************************** */
+void
+rltty_set_default_bindings (kmap)
+ Keymap kmap;
+{
+ TIOTYPE ttybuff;
+ int tty = fileno (rl_instream);
+
+#if defined (NEW_TTY_DRIVER)
+
+#define SET_SPECIAL(sc, func) \
+ do \
+ { \
+ int ic; \
+ ic = sc; \
+ if (ic != -1 && kmap[ic].type == ISFUNC) \
+ kmap[ic].function = func; \
+ } \
+ while (0)
+
+ if (get_tty_settings (tty, &ttybuff) == 0)
+ {
+ if (ttybuff.flags & SGTTY_SET)
+ {
+ SET_SPECIAL (ttybuff.sgttyb.sg_erase, rl_rubout);
+ SET_SPECIAL (ttybuff.sgttyb.sg_kill, rl_unix_line_discard);
+ }
+
+# if defined (TIOCGLTC)
+ if (ttybuff.flags & LTCHARS_SET)
+ {
+ SET_SPECIAL (ttybuff.ltchars.t_werasc, rl_unix_word_rubout);
+ SET_SPECIAL (ttybuff.ltchars.t_lnextc, rl_quoted_insert);
+ }
+# endif /* TIOCGLTC */
+ }
+
+#else /* !NEW_TTY_DRIVER */
+
+#define SET_SPECIAL(sc, func) \
+ do \
+ { \
+ unsigned char uc; \
+ uc = ttybuff.c_cc[sc]; \
+ if (uc != (unsigned char)_POSIX_VDISABLE && kmap[uc].type == ISFUNC) \
+ kmap[uc].function = func; \
+ } \
+ while (0)
+
+ if (get_tty_settings (tty, &ttybuff) == 0)
+ {
+ SET_SPECIAL (VERASE, rl_rubout);
+ SET_SPECIAL (VKILL, rl_unix_line_discard);
+
+# if defined (VLNEXT) && defined (TERMIOS_TTY_DRIVER)
+ SET_SPECIAL (VLNEXT, rl_quoted_insert);
+# endif /* VLNEXT && TERMIOS_TTY_DRIVER */
+
+# if defined (VWERASE) && defined (TERMIOS_TTY_DRIVER)
+ SET_SPECIAL (VWERASE, rl_unix_word_rubout);
+# endif /* VWERASE && TERMIOS_TTY_DRIVER */
+ }
+#endif /* !NEW_TTY_DRIVER */
+}
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