/* $OpenBSD: hack.tty.c,v 1.16 2019/06/28 13:32:52 deraadt Exp $ */ /*- * Copyright (c) 1988, 1993 * 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. */ /* * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica, * Amsterdam * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * - 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. * * - Neither the name of the Stichting Centrum voor Wiskunde en * Informatica, 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER * 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. */ /* * Copyright (c) 1982 Jay Fenlason <hack@gnu.org> * 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. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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. */ /* hack.tty.c - version 1.0.3 */ /* With thanks to the people who sent code for SYSV - hpscdi!jon, arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others. */ #include <stdio.h> #include <stdlib.h> #include <termios.h> #include "hack.h" static char erase_char, kill_char; static boolean settty_needed = FALSE; struct termios inittyb, curttyb; static void setctty(void); /* * Get initial state of terminal, * and switch off tab expansion if necessary. * Called by startup() in termcap.c and after returning from ! or ^Z */ void gettty(void) { if(tcgetattr(0, &inittyb) == -1) perror("Hack (gettty)"); curttyb = inittyb; erase_char = inittyb.c_cc[VERASE]; kill_char = inittyb.c_cc[VKILL]; getioctls(); /* do not expand tabs - they might be needed inside a cm sequence */ if(curttyb.c_oflag & OXTABS) { curttyb.c_oflag &= ~OXTABS; setctty(); } settty_needed = TRUE; } /* reset terminal to original state */ void settty(char *s) { clr_screen(); end_screen(); if(s) printf("%s", s); (void) fflush(stdout); if(tcsetattr(0, TCSADRAIN, &inittyb) == -1) perror("Hack (settty)"); flags.echo = (inittyb.c_lflag & ECHO) ? ON : OFF; flags.cbreak = (inittyb.c_lflag & ICANON) ? OFF : ON; setioctls(); } static void setctty(void) { if(tcsetattr(0, TCSADRAIN, &curttyb) == -1) perror("Hack (setctty)"); } void setftty(void) { int change = 0; flags.cbreak = ON; flags.echo = OFF; /* Should use (ECHO|CRMOD) here instead of ECHO */ if(curttyb.c_lflag & ECHO){ curttyb.c_lflag &= ~ECHO; change++; } if(curttyb.c_lflag & ICANON){ curttyb.c_lflag &= ~ICANON; /* be satisfied with one character; no timeout */ curttyb.c_cc[VMIN] = 1; curttyb.c_cc[VTIME] = 0; /* we need to be able to read ^Z */ curttyb.c_cc[VSUSP] = _POSIX_VDISABLE; change++; } if(change){ setctty(); } start_screen(); } /* fatal error */ void error(const char *s, ...) { va_list ap; if(settty_needed) settty(NULL); va_start(ap, s); vprintf(s, ap); va_end(ap); putchar('\n'); exit(1); } /* * Read a line closed with '\n' into the array char bufp[BUFSZ]. * (The '\n' is not stored. The string is closed with a '\0'.) * Reading can be interrupted by an escape ('\033') - now the * resulting string is "\033". */ void getlin(char *bufp) { char *obufp = bufp; int c; flags.toplin = 2; /* nonempty, no --More-- required */ for(;;) { (void) fflush(stdout); if((c = getchar()) == EOF) { *bufp = 0; return; } if(c == '\033') { *obufp = c; obufp[1] = 0; return; } if(c == erase_char || c == '\b') { if(bufp != obufp) { bufp--; putstr("\b \b"); /* putsym converts \b */ } else hackbell(); } else if(c == '\n') { *bufp = 0; return; } else if(' ' <= c && c < '\177') { /* avoid isprint() - some people don't have it ' ' is not always a printing char */ *bufp = c; bufp[1] = 0; putstr(bufp); if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO) bufp++; } else if(c == kill_char || c == '\177') { /* Robert Viduya */ /* this test last - @ might be the kill_char */ while(bufp != obufp) { bufp--; putstr("\b \b"); } } else hackbell(); } } void getret(void) { cgetret(""); } void cgetret(char *s) { putsym('\n'); if(flags.standout) standoutbeg(); putstr("Hit "); putstr(flags.cbreak ? "space" : "return"); putstr(" to continue: "); if(flags.standout) standoutend(); xwaitforspace(s); } char morc; /* tell the outside world what char he used */ /* s: chars allowed besides space or return */ void xwaitforspace(char *s) { int c; morc = 0; while((c = readchar()) != '\n') { if(flags.cbreak) { if(c == ' ') break; if(s && strchr(s,c)) { morc = c; break; } hackbell(); } } } char * parse(void) { static char inputline[COLNO]; int foo; flags.move = 1; if(!Invisible) curs_on_u(); else home(); while((foo = readchar()) >= '0' && foo <= '9') multi = 10*multi+foo-'0'; if(multi) { multi--; save_cm = inputline; } inputline[0] = foo; inputline[1] = 0; if(foo == 'f' || foo == 'F'){ inputline[1] = getchar(); #ifdef QUEST if(inputline[1] == foo) inputline[2] = getchar(); else #endif /* QUEST */ inputline[2] = 0; } if(foo == 'm' || foo == 'M'){ inputline[1] = getchar(); inputline[2] = 0; } clrlin(); return(inputline); } char readchar(void) { int sym; (void) fflush(stdout); if((sym = getchar()) == EOF) end_of_input(); if(flags.toplin == 1) flags.toplin = 2; return((char) sym); } void end_of_input(void) { settty("End of input?\n"); clearlocks(); exit(0); }
