Line data    Source code

       1             : /*      $OpenBSD: getsn.c,v 1.7 2018/04/25 11:15:58 dlg Exp $   */
       2             : 
       3             : /*
       4             :  * Copyright (c) 1996 Theo de Raadt
       5             :  * All rights reserved.
       6             :  *
       7             :  * Redistribution and use in source and binary forms, with or without
       8             :  * modification, are permitted provided that the following conditions
       9             :  * are met:
      10             :  * 1. Redistributions of source code must retain the above copyright
      11             :  *    notice, this list of conditions and the following disclaimer.
      12             :  * 2. Redistributions in binary form must reproduce the above copyright
      13             :  *    notice, this list of conditions and the following disclaimer in the
      14             :  *    documentation and/or other materials provided with the distribution.
      15             :  *
      16             :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      17             :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      18             :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      19             :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      20             :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      21             :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      22             :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      23             :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      24             :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      25             :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      26             :  */
      27             : 
      28             : #include <sys/types.h>
      29             : #include <sys/systm.h>
      30             : #include <dev/cons.h>
      31             : 
      32             : size_t
      33           0 : getsn(char *cp, size_t size)
      34             : {
      35             :         size_t len = 0;
      36             :         int  c;
      37             :         char *lp = cp;
      38             : 
      39           0 :         while (1) {
      40           0 :                 c = cngetc();
      41           0 :                 switch (c) {
      42             :                 case '\n':
      43             :                 case '\r':
      44           0 :                         printf("\n");
      45           0 :                         *lp++ = '\0';
      46           0 :                         return (len);
      47             :                 case '\b':
      48             :                 case '\177':
      49           0 :                         if (len) {
      50           0 :                                 printf("\b \b");
      51           0 :                                 --lp;
      52           0 :                                 --len;
      53           0 :                         }
      54             :                         break;
      55             :                 case 'u' & 037:
      56           0 :                         while (len) {
      57           0 :                                 printf("\b \b");
      58           0 :                                 --lp;
      59           0 :                                 --len;
      60             :                         }
      61             :                         break;
      62             :                 case '\t':
      63           0 :                         c = ' ';
      64             :                 default:
      65           0 :                         if (len + 1 >= size || c < ' ') {
      66           0 :                                 printf("\007");
      67           0 :                                 break;
      68             :                         }
      69           0 :                         printf("%c", c);
      70             :                         ++len;
      71           0 :                         *lp++ = c;
      72           0 :                 }
      73             :         }
      74             : }