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nethack/sys/share/unixtty.c
PatR e4f3559acc curses on unix - terminal reset needed after abort 
Noticed while investigating the message loop.  If I had level files
from an interrupted game and was asked "Destroy old game?" when
starting a new one, answering 'n' left the terminal in an unusable
state.  Executing 'stty sane' (invisibly since input echo was off)
repaired things but the user shouldn't have to do that.

Change unixtty.c's error() to shut down windowing if that has been
initialized.  This might need some tweaking for tty, which will now
clear the screen before showing the startup error message.  Other
systems besides unix use unixtty.c so are affected, but I think the
change doesn't introduce anything that should cause trouble (aside
from the potential screen erasure).
2019-10-09 13:18:34 -07:00

486 lines
11 KiB
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/* NetHack 3.6 unixtty.c $NHDT-Date: 1570652308 2019/10/09 20:18:28 $ $NHDT-Branch: NetHack-3.6 $:$NHDT-Revision: 1.26 $ */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/*-Copyright (c) Michael Allison, 2006. */
/* NetHack may be freely redistributed. See license for details. */
/* tty.c - (Unix) version */
/* With thanks to the people who sent code for SYSV - hpscdi!jon,
* arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others.
*/
#define NEED_VARARGS
#include "hack.h"
/*
* The distinctions here are not BSD - rest but rather USG - rest, as
* BSD still has the old sgttyb structure, but SYSV has termio. Thus:
*/
#if (defined(BSD) || defined(ULTRIX)) && !defined(POSIX_TYPES)
#define V7
#else
#define USG
#endif
#ifdef USG
#ifdef POSIX_TYPES
#include <termios.h>
#include <unistd.h>
#define termstruct termios
#else
#include <termio.h>
#if defined(TCSETS) && !defined(AIX_31)
#define termstruct termios
#else
#define termstruct termio
#endif
#endif /* POSIX_TYPES */
#ifdef LINUX
#include <sys/ioctl.h>
#undef delay_output /* curses redefines this */
#include <curses.h>
#endif
#define kill_sym c_cc[VKILL]
#define erase_sym c_cc[VERASE]
#define intr_sym c_cc[VINTR]
#ifdef TAB3 /* not a POSIX flag, but some have it anyway */
#define EXTABS TAB3
#else
#define EXTABS 0
#endif
#define tabflgs c_oflag
#define echoflgs c_lflag
#define cbrkflgs c_lflag
#define CBRKMASK ICANON
#define CBRKON !/* reverse condition */
#ifdef POSIX_TYPES
#define OSPEED(x) (speednum(cfgetospeed(&x)))
#else
#ifndef CBAUD
#define CBAUD _CBAUD /* for POSIX nitpickers (like RS/6000 cc) */
#endif
#define OSPEED(x) ((x).c_cflag & CBAUD)
#endif
#define IS_7BIT(x) ((x).c_cflag & CS7)
#define inputflags c_iflag
#define STRIPHI ISTRIP
#ifdef POSIX_TYPES
#define GTTY(x) (tcgetattr(0, x))
#define STTY(x) (tcsetattr(0, TCSADRAIN, x))
#else
#if defined(TCSETS) && !defined(AIX_31)
#define GTTY(x) (ioctl(0, TCGETS, x))
#define STTY(x) (ioctl(0, TCSETSW, x))
#else
#define GTTY(x) (ioctl(0, TCGETA, x))
#define STTY(x) (ioctl(0, TCSETAW, x))
#endif
#endif /* POSIX_TYPES */
#define GTTY2(x) 1
#define STTY2(x) 1
#ifdef POSIX_TYPES
#if defined(BSD) && !defined(__DGUX__)
#define nonesuch _POSIX_VDISABLE
#else
#define nonesuch (fpathconf(0, _PC_VDISABLE))
#endif
#else
#define nonesuch 0
#endif
#define inittyb2 inittyb
#define curttyb2 curttyb
#else /* V7 */
#include <sgtty.h>
#define termstruct sgttyb
#define kill_sym sg_kill
#define erase_sym sg_erase
#define intr_sym t_intrc
#define EXTABS XTABS
#define tabflgs sg_flags
#define echoflgs sg_flags
#define cbrkflgs sg_flags
#define CBRKMASK CBREAK
#define CBRKON /* empty */
#define inputflags sg_flags /* don't know how enabling meta bits */
#define IS_7BIT(x) (FALSE)
#define STRIPHI 0 /* should actually be done on BSD */
#define OSPEED(x) (x).sg_ospeed
#if defined(bsdi) || defined(__386BSD) || defined(SUNOS4)
#define GTTY(x) (ioctl(0, TIOCGETP, (char *) x))
#define STTY(x) (ioctl(0, TIOCSETP, (char *) x))
#else
#define GTTY(x) (gtty(0, x))
#define STTY(x) (stty(0, x))
#endif
#define GTTY2(x) (ioctl(0, TIOCGETC, (char *) x))
#define STTY2(x) (ioctl(0, TIOCSETC, (char *) x))
#define nonesuch -1
struct tchars inittyb2, curttyb2;
#endif /* V7 */
/*
* Old curses.h relied on implicit declaration of has_colors().
* Modern compilers tend to warn about implicit declarations and
* modern curses.h declares has_colors() explicitly. However, the
* declaration it uses is not one we can simply clone (requires
* <stdbool.h>). This simpler declaration suffices but can't be
* used unconditionally because it conflicts with the 'bool' one.
*/
#ifdef NEED_HAS_COLORS_DECL
int has_colors();
#endif
#if defined(TTY_GRAPHICS) && ((!defined(SYSV) && !defined(HPUX)) \
|| defined(UNIXPC) || defined(SVR4))
#ifndef LINT
extern /* it is defined in libtermlib (libtermcap) */
#endif
short ospeed; /* terminal baudrate; set by gettty */
#else
short ospeed = 0; /* gets around "not defined" error message */
#endif
#if defined(POSIX_TYPES) && defined(BSD)
unsigned
#endif
char erase_char,
intr_char, kill_char;
static boolean settty_needed = FALSE;
struct termstruct inittyb, curttyb;
#ifdef POSIX_TYPES
static int
speednum(speed)
speed_t speed;
{
switch (speed) {
case B0:
return 0;
case B50:
return 1;
case B75:
return 2;
case B110:
return 3;
case B134:
return 4;
case B150:
return 5;
case B200:
return 6;
case B300:
return 7;
case B600:
return 8;
case B1200:
return 9;
case B1800:
return 10;
case B2400:
return 11;
case B4800:
return 12;
case B9600:
return 13;
case B19200:
return 14;
case B38400:
return 15;
}
return 0;
}
#endif
static void
setctty()
{
if (STTY(&curttyb) < 0 || STTY2(&curttyb2) < 0)
perror("NetHack (setctty)");
}
/*
* Get initial state of terminal, set ospeed (for termcap routines)
* and switch off tab expansion if necessary.
* Called by startup() in termcap.c and after returning from ! or ^Z
*/
void
gettty()
{
if (GTTY(&inittyb) < 0 || GTTY2(&inittyb2) < 0)
perror("NetHack (gettty)");
curttyb = inittyb;
curttyb2 = inittyb2;
ospeed = OSPEED(inittyb);
erase_char = inittyb.erase_sym;
kill_char = inittyb.kill_sym;
intr_char = inittyb2.intr_sym;
getioctls();
/* do not expand tabs - they might be needed inside a cm sequence */
if (curttyb.tabflgs & EXTABS) {
curttyb.tabflgs &= ~EXTABS;
setctty();
}
settty_needed = TRUE;
}
/* reset terminal to original state */
void
settty(s)
const char *s;
{
end_screen();
if (s)
raw_print(s);
if (STTY(&inittyb) < 0 || STTY2(&inittyb2) < 0)
perror("NetHack (settty)");
iflags.echo = (inittyb.echoflgs & ECHO) ? ON : OFF;
iflags.cbreak = (CBRKON(inittyb.cbrkflgs & CBRKMASK)) ? ON : OFF;
curttyb.inputflags |= STRIPHI;
setioctls();
settty_needed = FALSE;
}
void
setftty()
{
unsigned ef, cf;
int change = 0;
ef = 0; /* desired value of flags & ECHO */
cf = CBRKON(CBRKMASK); /* desired value of flags & CBREAK */
iflags.cbreak = ON;
iflags.echo = OFF;
/* Should use (ECHO|CRMOD) here instead of ECHO */
if ((unsigned) (curttyb.echoflgs & ECHO) != ef) {
curttyb.echoflgs &= ~ECHO;
/* curttyb.echoflgs |= ef; */
change++;
}
if ((unsigned) (curttyb.cbrkflgs & CBRKMASK) != cf) {
curttyb.cbrkflgs &= ~CBRKMASK;
curttyb.cbrkflgs |= cf;
#ifdef USG
/* be satisfied with one character; no timeout */
curttyb.c_cc[VMIN] = 1; /* was VEOF */
curttyb.c_cc[VTIME] = 0; /* was VEOL */
#ifdef POSIX_JOB_CONTROL
/* turn off system suspend character
* due to differences in structure layout, this has to be
* here instead of in ioctl.c:getioctls() with the BSD
* equivalent
*/
#ifdef VSUSP /* real POSIX */
curttyb.c_cc[VSUSP] = nonesuch;
#else /* other later SYSV */
curttyb.c_cc[VSWTCH] = nonesuch;
#endif
#endif
#ifdef VDSUSP /* SunOS Posix extensions */
curttyb.c_cc[VDSUSP] = nonesuch;
#endif
#ifdef VREPRINT
curttyb.c_cc[VREPRINT] = nonesuch;
#endif
#ifdef VDISCARD
curttyb.c_cc[VDISCARD] = nonesuch;
#endif
#ifdef VWERASE
curttyb.c_cc[VWERASE] = nonesuch;
#endif
#ifdef VLNEXT
curttyb.c_cc[VLNEXT] = nonesuch;
#endif
#endif
change++;
}
if (!IS_7BIT(inittyb))
curttyb.inputflags &= ~STRIPHI;
/* If an interrupt character is used, it will be overridden and
* set to ^C.
*/
if (intr_char != nonesuch && curttyb2.intr_sym != '\003') {
curttyb2.intr_sym = '\003';
change++;
}
if (change)
setctty();
start_screen();
}
void intron() /* enable kbd interupts if enabled when game started */
{
#ifdef TTY_GRAPHICS
/* Ugly hack to keep from changing tty modes for non-tty games -dlc */
if (WINDOWPORT("tty") && intr_char != nonesuch
&& curttyb2.intr_sym != '\003') {
curttyb2.intr_sym = '\003';
setctty();
}
#endif
}
void introff() /* disable kbd interrupts if required*/
{
#ifdef TTY_GRAPHICS
/* Ugly hack to keep from changing tty modes for non-tty games -dlc */
if (WINDOWPORT("tty") && curttyb2.intr_sym != nonesuch) {
curttyb2.intr_sym = nonesuch;
setctty();
}
#endif
}
#ifdef _M_UNIX /* SCO UNIX (3.2.4), from Andreas Arens */
#include <sys/console.h>
#define BSIZE (E_TABSZ * 2)
#define LDIOC ('D' << 8) /* POSIX prevents definition */
#include <sys/emap.h>
int sco_flag_console = 0;
int sco_map_valid = -1;
unsigned char sco_chanmap_buf[BSIZE];
void NDECL(sco_mapon);
void NDECL(sco_mapoff);
void NDECL(check_sco_console);
void NDECL(init_sco_cons);
void
sco_mapon()
{
#ifdef TTY_GRAPHICS
if (WINDOWPORT("tty") && sco_flag_console) {
if (sco_map_valid != -1) {
ioctl(0, LDSMAP, sco_chanmap_buf);
}
sco_map_valid = -1;
}
#endif
}
void
sco_mapoff()
{
#ifdef TTY_GRAPHICS
if (WINDOWPORT("tty") && sco_flag_console) {
sco_map_valid = ioctl(0, LDGMAP, sco_chanmap_buf);
if (sco_map_valid != -1) {
ioctl(0, LDNMAP, (char *) 0);
}
}
#endif
}
void
check_sco_console()
{
if (isatty(0) && ioctl(0, CONS_GET, 0) != -1) {
sco_flag_console = 1;
}
}
void
init_sco_cons()
{
#ifdef TTY_GRAPHICS
if (WINDOWPORT("tty") && sco_flag_console) {
atexit(sco_mapon);
sco_mapoff();
load_symset("IBMGraphics", PRIMARY);
load_symset("RogueIBM", ROGUESET);
switch_symbols(TRUE);
#ifdef TEXTCOLOR
if (has_colors())
iflags.use_color = TRUE;
#endif
}
#endif
}
#endif /* _M_UNIX */
#ifdef __linux__ /* via Jesse Thilo and Ben Gertzfield */
#include <sys/vt.h>
#include <sys/ioctl.h>
int linux_flag_console = 0;
void NDECL(linux_mapon);
void NDECL(linux_mapoff);
void NDECL(check_linux_console);
void NDECL(init_linux_cons);
void
linux_mapon()
{
#ifdef TTY_GRAPHICS
if (WINDOWPORT("tty") && linux_flag_console) {
write(1, "\033(B", 3);
}
#endif
}
void
linux_mapoff()
{
#ifdef TTY_GRAPHICS
if (WINDOWPORT("tty") && linux_flag_console) {
write(1, "\033(U", 3);
}
#endif
}
void
check_linux_console()
{
struct vt_mode vtm;
if (isatty(0) && ioctl(0, VT_GETMODE, &vtm) >= 0) {
linux_flag_console = 1;
}
}
void
init_linux_cons()
{
#ifdef TTY_GRAPHICS
if (WINDOWPORT("tty") && linux_flag_console) {
atexit(linux_mapon);
linux_mapoff();
#ifdef TEXTCOLOR
if (has_colors())
iflags.use_color = TRUE;
#endif
}
#endif
}
#endif /* __linux__ */
#ifndef __begui__ /* the Be GUI will define its own error proc */
/* fatal error */
/*VARARGS1*/
void error
VA_DECL(const char *, s)
{
VA_START(s);
VA_INIT(s, const char *);
if (iflags.window_inited)
exit_nhwindows((char *) 0); /* for tty, will call settty() */
if (settty_needed)
settty((char *) 0);
Vprintf(s, VA_ARGS);
(void) putchar('\n');
VA_END();
exit(EXIT_FAILURE);
}
#endif /* !__begui__ */
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