/* $OpenBSD: tty.c,v 1.3 2005/08/14 17:15:19 espie 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 #include #include #include "curses.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(). */ #ifdef TCSASOFT int __tcaction = 1; /* Ignore hardware settings. */ #else int __tcaction = 0; #endif struct termios __orig_termios, __baset; static struct termios cbreakt, rawt, *curt; static int useraw; #ifndef OXTABS #ifdef XTABS /* SMI uses XTABS. */ #define OXTABS XTABS #else #define OXTABS 0 #endif #endif /* * gettmode -- * Do terminal type initialization. */ int gettmode() { useraw = 0; if (tcgetattr(STDIN_FILENO, &__orig_termios)) return (ERR); __baset = __orig_termios; __baset.c_oflag &= ~OXTABS; GT = 0; /* historical. was used before we wired OXTABS off */ NONL = (__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. */ cbreakt = __baset; cbreakt.c_lflag &= ~ICANON; cbreakt.c_cc[VMIN] = 1; cbreakt.c_cc[VTIME] = 0; rawt = cbreakt; rawt.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|INLCR|IGNCR|ICRNL|IXON); rawt.c_oflag &= ~OPOST; rawt.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); /* * 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. */ if (!__tcaction) { rawt.c_iflag &= ~ISTRIP; rawt.c_cflag &= ~(CSIZE|PARENB); rawt.c_cflag |= CS8; } curt = &__baset; return (tcsetattr(STDIN_FILENO, __tcaction ? TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); } int raw() { useraw = __pfast = __rawmode = 1; curt = &rawt; return (tcsetattr(STDIN_FILENO, __tcaction ? TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); } int noraw() { useraw = __pfast = __rawmode = 0; curt = &__baset; return (tcsetattr(STDIN_FILENO, __tcaction ? TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); } int cbreak() { __rawmode = 1; curt = useraw ? &rawt : &cbreakt; return (tcsetattr(STDIN_FILENO, __tcaction ? TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); } int nocbreak() { __rawmode = 0; curt = useraw ? &rawt : &__baset; return (tcsetattr(STDIN_FILENO, __tcaction ? TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); } int echo() { rawt.c_lflag |= ECHO; cbreakt.c_lflag |= ECHO; __baset.c_lflag |= ECHO; __echoit = 1; return (tcsetattr(STDIN_FILENO, __tcaction ? TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); } int noecho() { rawt.c_lflag &= ~ECHO; cbreakt.c_lflag &= ~ECHO; __baset.c_lflag &= ~ECHO; __echoit = 0; return (tcsetattr(STDIN_FILENO, __tcaction ? TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); } int nl() { rawt.c_iflag |= ICRNL; rawt.c_oflag |= ONLCR; cbreakt.c_iflag |= ICRNL; cbreakt.c_oflag |= ONLCR; __baset.c_iflag |= ICRNL; __baset.c_oflag |= ONLCR; __pfast = __rawmode; return (tcsetattr(STDIN_FILENO, __tcaction ? TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); } int nonl() { rawt.c_iflag &= ~ICRNL; rawt.c_oflag &= ~ONLCR; cbreakt.c_iflag &= ~ICRNL; cbreakt.c_oflag &= ~ONLCR; __baset.c_iflag &= ~ICRNL; __baset.c_oflag &= ~ONLCR; __pfast = 1; return (tcsetattr(STDIN_FILENO, __tcaction ? TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); } void __startwin() { static char *stdbuf; static size_t len; (void)fflush(stdout); /* * 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 standout information) but no more than 8K. */ if (stdbuf == NULL) { if ((len = LINES * COLS * 2) > 8192) len = 8192; if ((stdbuf = malloc(len)) == NULL) len = 0; } (void)setvbuf(stdout, stdbuf, _IOFBF, len); tputs(TI, 0, __cputchar); tputs(VS, 0, __cputchar); } int endwin() { __restore_stophandler(); if (curscr != NULL) { if (curscr->flags & __WSTANDOUT) { tputs(SE, 0, __cputchar); curscr->flags &= ~__WSTANDOUT; } __mvcur(curscr->cury, curscr->cury, curscr->maxy - 1, 0, 0); } (void)tputs(VE, 0, __cputchar); (void)tputs(TE, 0, __cputchar); (void)fflush(stdout); (void)setvbuf(stdout, NULL, _IOLBF, 0); return (tcsetattr(STDIN_FILENO, __tcaction ? TCSASOFT | TCSADRAIN : TCSADRAIN, &__orig_termios) ? ERR : 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() { return (tcgetattr(STDIN_FILENO, &savedtty) ? ERR : OK); } int resetty() { return (tcsetattr(STDIN_FILENO, __tcaction ? TCSASOFT | TCSADRAIN : TCSADRAIN, &savedtty) ? ERR : OK); }