/* $NetBSD: tty.c,v 1.49.2.1 2023/10/10 13:17:46 martin Exp $ */ /*- * Copyright (c) 1992, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifndef lint #if 0 static char sccsid[] = "@(#)tty.c 8.6 (Berkeley) 1/10/95"; #else __RCSID("$NetBSD: tty.c,v 1.49.2.1 2023/10/10 13:17:46 martin Exp $"); #endif #endif /* not lint */ #include #include #include #include #include #include #include #include "curses.h" #include "curses_private.h" /* * In general, curses should leave tty hardware settings alone (speed, parity, * word size). This is most easily done in BSD by using TCSASOFT on all * tcsetattr calls. On other systems, it would be better to get and restore * those attributes at each change, or at least when stopped and restarted. * See also the comments in getterm(). */ #ifndef TCSASOFT #define TCSASOFT 0 #endif int __tcaction = TCSASOFT != 0; /* Ignore hardware settings */ #ifndef OXTABS #ifdef XTABS /* SMI uses XTABS. */ #define OXTABS XTABS #else #define OXTABS 0 #endif #endif /* * baudrate -- * Return the current baudrate */ int baudrate(void) { if (_cursesi_screen->notty == TRUE) return 0; return cfgetospeed(&_cursesi_screen->baset); } /* * gettmode -- * Do terminal type initialization. */ int gettmode(void) { if (_cursesi_gettmode(_cursesi_screen) == ERR) return ERR; __GT = _cursesi_screen->GT; __NONL = _cursesi_screen->NONL; return OK; } /* * _cursesi_gettmode -- * Do the terminal type initialisation for the tty attached to the * given screen. */ int _cursesi_gettmode(SCREEN *screen) { screen->useraw = 0; if (tcgetattr(fileno(screen->infd), &screen->orig_termios)) { /* if the input fd is not a tty try the output */ if (tcgetattr(fileno(screen->outfd), &screen->orig_termios)) { /* not a tty ... we will disable tty related stuff */ screen->notty = TRUE; __GT = 0; __NONL = 0; return OK; } } screen->baset = screen->orig_termios; screen->baset.c_oflag &= ~OXTABS; screen->GT = 0; /* historical. was used before we wired OXTABS off */ screen->NONL = (screen->baset.c_oflag & ONLCR) == 0; /* * XXX * System V and SMI systems overload VMIN and VTIME, such that * VMIN is the same as the VEOF element, and VTIME is the same * as the VEOL element. This means that, if VEOF was ^D, the * default VMIN is 4. Majorly stupid. */ screen->cbreakt = screen->baset; screen->cbreakt.c_lflag &= ~(ECHO | ECHONL | ICANON); screen->cbreakt.c_cc[VMIN] = 1; screen->cbreakt.c_cc[VTIME] = 0; screen->rawt = screen->cbreakt; screen->rawt.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | INLCR | IGNCR | ICRNL | IXON); screen->rawt.c_oflag &= ~OPOST; screen->rawt.c_lflag &= ~(ISIG | IEXTEN); #if TCSASOFT == 0 /* * In general, curses should leave hardware-related settings alone. * This includes parity and word size. Older versions set the tty * to 8 bits, no parity in raw(), but this is considered to be an * artifact of the old tty interface. If it's desired to change * parity and word size, the TCSASOFT bit has to be removed from the * calls that switch to/from "raw" mode. */ screen->rawt.c_iflag &= ~ISTRIP; screen->rawt.c_cflag &= ~(CSIZE | PARENB); screen->rawt.c_cflag |= CS8; #endif screen->curt = &screen->baset; return tcsetattr(fileno(screen->infd), TCSASOFT | TCSADRAIN, screen->curt) ? ERR : OK; } /* * raw -- * Put the terminal into raw mode */ int raw(void) { __CTRACE(__CTRACE_MISC, "raw()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); _cursesi_screen->useraw = __pfast = __rawmode = 1; _cursesi_screen->curt = &_cursesi_screen->rawt; if (_cursesi_screen->notty == TRUE) return OK; return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN, _cursesi_screen->curt) ? ERR : OK; } /* * noraw -- * Put the terminal into cooked mode */ int noraw(void) { __CTRACE(__CTRACE_MISC, "noraw()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); _cursesi_screen->useraw = __pfast = __rawmode = 0; if (_cursesi_screen->notty == TRUE) return OK; _cursesi_screen->curt = &_cursesi_screen->baset; return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN, _cursesi_screen->curt) ? ERR : OK; } /* * cbreak -- * Enable cbreak mode */ int cbreak(void) { __CTRACE(__CTRACE_MISC, "cbreak()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); __rawmode = 1; if (_cursesi_screen->notty == TRUE) return OK; _cursesi_screen->curt = _cursesi_screen->useraw ? &_cursesi_screen->rawt : &_cursesi_screen->cbreakt; return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN, _cursesi_screen->curt) ? ERR : OK; } /* * nocbreak -- * Disable cbreak mode */ int nocbreak(void) { __CTRACE(__CTRACE_MISC, "nocbreak()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); __rawmode = 0; if (_cursesi_screen->notty == TRUE) return OK; /* if we were in halfdelay mode then nuke the timeout */ if ((stdscr->flags & __HALFDELAY) && (__notimeout() == ERR)) return ERR; stdscr->flags &= ~__HALFDELAY; _cursesi_screen->curt = _cursesi_screen->useraw ? &_cursesi_screen->rawt : &_cursesi_screen->baset; return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN, _cursesi_screen->curt) ? ERR : OK; } /* * halfdelay -- * Put the terminal into cbreak mode with the specified timeout. * */ int halfdelay(int duration) { if ((duration < 1) || (duration > 255)) return ERR; if (cbreak() == ERR) return ERR; if (duration > 255) stdscr->delay = 255; else stdscr->delay = duration; stdscr->flags |= __HALFDELAY; return OK; } int __delay(void) { __CTRACE(__CTRACE_MISC, "__delay()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); if (_cursesi_screen->notty == TRUE) return OK; _cursesi_screen->rawt.c_cc[VMIN] = 1; _cursesi_screen->rawt.c_cc[VTIME] = 0; _cursesi_screen->cbreakt.c_cc[VMIN] = 1; _cursesi_screen->cbreakt.c_cc[VTIME] = 0; _cursesi_screen->baset.c_cc[VMIN] = 1; _cursesi_screen->baset.c_cc[VTIME] = 0; if (tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW, _cursesi_screen->curt)) { __restore_termios(); return ERR; } return OK; } int __nodelay(void) { __CTRACE(__CTRACE_MISC, "__nodelay()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); if (_cursesi_screen->notty == TRUE) return OK; _cursesi_screen->rawt.c_cc[VMIN] = 0; _cursesi_screen->rawt.c_cc[VTIME] = 0; _cursesi_screen->cbreakt.c_cc[VMIN] = 0; _cursesi_screen->cbreakt.c_cc[VTIME] = 0; _cursesi_screen->baset.c_cc[VMIN] = 0; _cursesi_screen->baset.c_cc[VTIME] = 0; if (tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW, _cursesi_screen->curt)) { __restore_termios(); return ERR; } return OK; } void __save_termios(void) { /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); if (_cursesi_screen->notty == TRUE) return; _cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN]; _cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME]; } void __restore_termios(void) { /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); if (_cursesi_screen->notty == TRUE) return; _cursesi_screen->rawt.c_cc[VMIN] = _cursesi_screen->ovmin; _cursesi_screen->rawt.c_cc[VTIME] = _cursesi_screen->ovtime; _cursesi_screen->cbreakt.c_cc[VMIN] = _cursesi_screen->ovmin; _cursesi_screen->cbreakt.c_cc[VTIME] = _cursesi_screen->ovtime; _cursesi_screen->baset.c_cc[VMIN] = _cursesi_screen->ovmin; _cursesi_screen->baset.c_cc[VTIME] = _cursesi_screen->ovtime; } int __timeout(int delay) { __CTRACE(__CTRACE_MISC, "__timeout()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); if (_cursesi_screen->notty == TRUE) return OK; _cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN]; _cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME]; _cursesi_screen->rawt.c_cc[VMIN] = 0; _cursesi_screen->rawt.c_cc[VTIME] = delay; _cursesi_screen->cbreakt.c_cc[VMIN] = 0; _cursesi_screen->cbreakt.c_cc[VTIME] = delay; _cursesi_screen->baset.c_cc[VMIN] = 0; _cursesi_screen->baset.c_cc[VTIME] = delay; if (tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW, _cursesi_screen->curt)) { __restore_termios(); return ERR; } return OK; } int __notimeout(void) { __CTRACE(__CTRACE_MISC, "__notimeout()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); if (_cursesi_screen->notty == TRUE) return OK; _cursesi_screen->rawt.c_cc[VMIN] = 1; _cursesi_screen->rawt.c_cc[VTIME] = 0; _cursesi_screen->cbreakt.c_cc[VMIN] = 1; _cursesi_screen->cbreakt.c_cc[VTIME] = 0; _cursesi_screen->baset.c_cc[VMIN] = 1; _cursesi_screen->baset.c_cc[VTIME] = 0; return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW, _cursesi_screen->curt) ? ERR : OK; } int echo(void) { __CTRACE(__CTRACE_MISC, "echo()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); __echoit = 1; return OK; } int noecho(void) { __CTRACE(__CTRACE_MISC, "noecho()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); __echoit = 0; return OK; } int nl(void) { __CTRACE(__CTRACE_MISC, "nl()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); if (_cursesi_screen->notty == TRUE) return OK; _cursesi_screen->rawt.c_iflag |= ICRNL; _cursesi_screen->rawt.c_oflag |= ONLCR; _cursesi_screen->cbreakt.c_iflag |= ICRNL; _cursesi_screen->cbreakt.c_oflag |= ONLCR; _cursesi_screen->baset.c_iflag |= ICRNL; _cursesi_screen->baset.c_oflag |= ONLCR; _cursesi_screen->nl = 1; _cursesi_screen->pfast = _cursesi_screen->rawmode; return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN, _cursesi_screen->curt) ? ERR : OK; } int nonl(void) { __CTRACE(__CTRACE_MISC, "nonl()\n"); /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); if (_cursesi_screen->notty == TRUE) return OK; _cursesi_screen->rawt.c_iflag &= ~ICRNL; _cursesi_screen->rawt.c_oflag &= ~ONLCR; _cursesi_screen->cbreakt.c_iflag &= ~ICRNL; _cursesi_screen->cbreakt.c_oflag &= ~ONLCR; _cursesi_screen->baset.c_iflag &= ~ICRNL; _cursesi_screen->baset.c_oflag &= ~ONLCR; _cursesi_screen->nl = 0; __pfast = 1; return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN, _cursesi_screen->curt) ? ERR : OK; } #ifndef _CURSES_USE_MACROS void noqiflush(void) { (void)intrflush(stdscr, FALSE); } void qiflush(void) { (void)intrflush(stdscr, TRUE); } #endif /* _CURSES_USE_MACROS */ /*ARGSUSED*/ int intrflush(WINDOW *win, bool bf) { /* Check if we need to restart ... */ if (_cursesi_screen->endwin) __restartwin(); if (_cursesi_screen->notty == TRUE) return OK; if (bf) { _cursesi_screen->rawt.c_lflag &= ~NOFLSH; _cursesi_screen->cbreakt.c_lflag &= ~NOFLSH; _cursesi_screen->baset.c_lflag &= ~NOFLSH; } else { _cursesi_screen->rawt.c_lflag |= NOFLSH; _cursesi_screen->cbreakt.c_lflag |= NOFLSH; _cursesi_screen->baset.c_lflag |= NOFLSH; } __pfast = 1; return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN, _cursesi_screen->curt) ? ERR : OK; } void __startwin(SCREEN *screen) { (void)fflush(screen->infd); #ifdef BSD /* * Some C libraries default to a 1K buffer when talking to a tty. * With a larger screen, especially across a network, we'd like * to get it to all flush in a single write. Make it twice as big * as just the characters (so that we have room for cursor motions * and attribute information) but no more than 8K. * * However, setvbuf may only be used after opening a stream and * before any operations have been performed on it. * This means we cannot work portably if an application wants * to stop curses and start curses after a resize. * Curses resizing is not standard, and thus not strictly portable * even though all curses today support it. * The BSD systems do not suffer from this limitation on setvbuf. */ if (screen->stdbuf == NULL) { screen->len = LINES * COLS * 2; if (screen->len > 8192) screen->len = 8192; if ((screen->stdbuf = malloc(screen->len)) == NULL) screen->len = 0; } (void)setvbuf(screen->outfd, screen->stdbuf, _IOFBF, screen->len); #endif ti_puts(screen->term, t_enter_ca_mode(screen->term), 0, __cputchar_args, (void *) screen->outfd); ti_puts(screen->term, t_cursor_normal(screen->term), 0, __cputchar_args, (void *) screen->outfd); if (screen->curscr->flags & __KEYPAD) ti_puts(screen->term, t_keypad_xmit(screen->term), 0, __cputchar_args, (void *) screen->outfd); screen->endwin = 0; } int endwin(void) { __CTRACE(__CTRACE_MISC, "endwin\n"); return __stopwin(); } bool isendwin(void) { return _cursesi_screen->endwin ? TRUE : FALSE; } int flushinp(void) { (void)fpurge(_cursesi_screen->infd); return OK; } /* * The following routines, savetty and resetty are completely useless and * are left in only as stubs. If people actually use them they will almost * certainly screw up the state of the world. */ /*static struct termios savedtty;*/ int savetty(void) { if (_cursesi_screen->notty == TRUE) return OK; return tcgetattr(fileno(_cursesi_screen->infd), &_cursesi_screen->savedtty) ? ERR : OK; } int resetty(void) { if (_cursesi_screen->notty == TRUE) return OK; return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN, &_cursesi_screen->savedtty) ? ERR : OK; } /* * erasechar -- * Return the character of the erase key. */ char erasechar(void) { if (_cursesi_screen->notty == TRUE) return 0; return _cursesi_screen->baset.c_cc[VERASE]; } /* * killchar -- * Return the character of the kill key. */ char killchar(void) { if (_cursesi_screen->notty == TRUE) return 0; return _cursesi_screen->baset.c_cc[VKILL]; } /* * erasewchar -- * Return the wide character of the erase key. */ int erasewchar(wchar_t *ch) { #ifndef HAVE_WCHAR return ERR; #else if (_cursesi_screen->notty == TRUE) return ERR; *ch = _cursesi_screen->baset.c_cc[VERASE]; return OK; #endif /* HAVE_WCHAR */ } /* * killwchar -- * Return the wide character of the kill key. */ int killwchar( wchar_t *ch ) { #ifndef HAVE_WCHAR return ERR; #else if (_cursesi_screen->notty == TRUE) return 0; *ch = _cursesi_screen->baset.c_cc[VKILL]; return OK; #endif /* HAVE_WCHAR */ } int typeahead(int filedes) { _cursesi_screen->checkfd = filedes; return OK; }