hack/hack.tty.c

   1 /*-
   2  * Copyright (c) 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 #if 0
  36 static char sccsid[] = "@(#)hack.tty.c  8.1 (Berkeley) 5/31/93";
  37 #else
  38 static char rcsid[] = "$NetBSD: hack.tty.c,v 1.5 1995/04/29 01:08:54 mycroft Exp $";
  39 #endif
  40 #endif /* not lint */
  41
  42 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
  43 /* hack.tty.c - version 1.0.3 */
  44 /* With thanks to the people who sent code for SYSV - hpscdi!jon,
  45    arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others. */
  46
  47 #include        "hack.h"
  48 #include        <stdio.h>
  49 #include        <termios.h>
  50
  51 /*
  52  * Some systems may have getchar() return EOF for various reasons, and
  53  * we should not quit before seeing at least NR_OF_EOFS consecutive EOFs.
  54  */
  55 #ifndef BSD
  56 #define NR_OF_EOFS      20
  57 #endif BSD
  58
  59 extern speed_t ospeed;
  60 static char erase_char, kill_char;
  61 static boolean settty_needed = FALSE;
  62 struct termios inittyb, curttyb;
  63
  64 /*
  65  * Get initial state of terminal, set ospeed (for termcap routines)
  66  * and switch off tab expansion if necessary.
  67  * Called by startup() in termcap.c and after returning from ! or ^Z
  68  */
  69 gettty(){
  70         if(tcgetattr(0, &inittyb) < 0)
  71                 perror("Hack (gettty)");
  72         curttyb = inittyb;
  73         ospeed = cfgetospeed(&inittyb);
  74         erase_char = inittyb.c_cc[VERASE];
  75         kill_char = inittyb.c_cc[VKILL];
  76         getioctls();
  77
  78         /* do not expand tabs - they might be needed inside a cm sequence */
  79         if(curttyb.c_oflag & OXTABS) {
  80                 curttyb.c_oflag &= ~OXTABS;
  81                 setctty();
  82         }
  83         settty_needed = TRUE;
  84 }
  85
  86 /* reset terminal to original state */
  87 settty(s) char *s; {
  88         clear_screen();
  89         end_screen();
  90         if(s) printf(s);
  91         (void) fflush(stdout);
  92         if(tcsetattr(0, TCSADRAIN, &inittyb) < 0)
  93                 perror("Hack (settty)");
  94         flags.echo = (inittyb.c_lflag & ECHO) ? ON : OFF;
  95         flags.cbreak = (inittyb.c_lflag & ICANON) ? OFF : ON;
  96         setioctls();
  97 }
  98
  99 setctty(){
 100         if(tcsetattr(0, TCSADRAIN, &curttyb) < 0)
 101                 perror("Hack (setctty)");
 102 }
 103
 104
 105 setftty(){
 106 register int change = 0;
 107         flags.cbreak = ON;
 108         flags.echo = OFF;
 109         /* Should use (ECHO|CRMOD) here instead of ECHO */
 110         if(curttyb.c_lflag & ECHO){
 111                 curttyb.c_lflag &= ~ECHO;
 112                 change++;
 113         }
 114         if(curttyb.c_lflag & ICANON){
 115                 curttyb.c_lflag &= ~ICANON;
 116                 /* be satisfied with one character; no timeout */
 117                 curttyb.c_cc[VMIN] = 1;
 118                 curttyb.c_cc[VTIME] = 0;
 119                 change++;
 120         }
 121         if(change){
 122                 setctty();
 123         }
 124         start_screen();
 125 }
 126
 127
 128 /* fatal error */
 129 /*VARARGS1*/
 130 error(s,x,y) char *s; {
 131         if(settty_needed)
 132                 settty((char *) 0);
 133         printf(s,x,y);
 134         putchar('\n');
 135         exit(1);
 136 }
 137
 138 /*
 139  * Read a line closed with '\n' into the array char bufp[BUFSZ].
 140  * (The '\n' is not stored. The string is closed with a '\0'.)
 141  * Reading can be interrupted by an escape ('\033') - now the
 142  * resulting string is "\033".
 143  */
 144 getlin(bufp)
 145 register char *bufp;
 146 {
 147         register char *obufp = bufp;
 148         register int c;
 149
 150         flags.toplin = 2;               /* nonempty, no --More-- required */
 151         for(;;) {
 152                 (void) fflush(stdout);
 153                 if((c = getchar()) == EOF) {
 154                         *bufp = 0;
 155                         return;
 156                 }
 157                 if(c == '\033') {
 158                         *obufp = c;
 159                         obufp[1] = 0;
 160                         return;
 161                 }
 162                 if(c == erase_char || c == '\b') {
 163                         if(bufp != obufp) {
 164                                 bufp--;
 165                                 putstr("\b \b"); /* putsym converts \b */
 166                         } else  bell();
 167                 } else if(c == '\n') {
 168                         *bufp = 0;
 169                         return;
 170                 } else if(' ' <= c && c < '\177') {
 171                                 /* avoid isprint() - some people don't have it
 172                                    ' ' is not always a printing char */
 173                         *bufp = c;
 174                         bufp[1] = 0;
 175                         putstr(bufp);
 176                         if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
 177                                 bufp++;
 178                 } else if(c == kill_char || c == '\177') { /* Robert Viduya */
 179                                 /* this test last - @ might be the kill_char */
 180                         while(bufp != obufp) {
 181                                 bufp--;
 182                                 putstr("\b \b");
 183                         }
 184                 } else
 185                         bell();
 186         }
 187 }
 188
 189 getret() {
 190         cgetret("");
 191 }
 192
 193 cgetret(s)
 194 register char *s;
 195 {
 196         putsym('\n');
 197         if(flags.standout)
 198                 standoutbeg();
 199         putstr("Hit ");
 200         putstr(flags.cbreak ? "space" : "return");
 201         putstr(" to continue: ");
 202         if(flags.standout)
 203                 standoutend();
 204         xwaitforspace(s);
 205 }
 206
 207 char morc;      /* tell the outside world what char he used */
 208
 209 xwaitforspace(s)
 210 register char *s;       /* chars allowed besides space or return */
 211 {
 212 register int c;
 213
 214         morc = 0;
 215
 216         while((c = readchar()) != '\n') {
 217             if(flags.cbreak) {
 218                 if(c == ' ') break;
 219                 if(s && index(s,c)) {
 220                         morc = c;
 221                         break;
 222                 }
 223                 bell();
 224             }
 225         }
 226 }
 227
 228 char *
 229 parse()
 230 {
 231         static char inputline[COLNO];
 232         register foo;
 233
 234         flags.move = 1;
 235         if(!Invisible) curs_on_u(); else home();
 236         while((foo = readchar()) >= '0' && foo <= '9')
 237                 multi = 10*multi+foo-'0';
 238         if(multi) {
 239                 multi--;
 240                 save_cm = inputline;
 241         }
 242         inputline[0] = foo;
 243         inputline[1] = 0;
 244         if(foo == 'f' || foo == 'F'){
 245                 inputline[1] = getchar();
 246 #ifdef QUEST
 247                 if(inputline[1] == foo) inputline[2] = getchar(); else
 248 #endif QUEST
 249                 inputline[2] = 0;
 250         }
 251         if(foo == 'm' || foo == 'M'){
 252                 inputline[1] = getchar();
 253                 inputline[2] = 0;
 254         }
 255         clrlin();
 256         return(inputline);
 257 }
 258
 259 char
 260 readchar() {
 261         register int sym;
 262
 263         (void) fflush(stdout);
 264         if((sym = getchar()) == EOF)
 265 #ifdef NR_OF_EOFS
 266         { /*
 267            * Some SYSV systems seem to return EOFs for various reasons
 268            * (?like when one hits break or for interrupted systemcalls?),
 269            * and we must see several before we quit.
 270            */
 271                 register int cnt = NR_OF_EOFS;
 272                 while (cnt--) {
 273                     clearerr(stdin);    /* omit if clearerr is undefined */
 274                     if((sym = getchar()) != EOF) goto noteof;
 275                 }
 276                 end_of_input();
 277              noteof:    ;
 278         }
 279 #else
 280                 end_of_input();
 281 #endif NR_OF_EOFS
 282         if(flags.toplin == 1)
 283                 flags.toplin = 2;
 284         return((char) sym);
 285 }
 286
 287 end_of_input()
 288 {
 289         settty("End of input?\n");
 290         clearlocks();
 291         exit(0);
 292 }