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Annotation of sys/lib/libkern/getsn.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: getsn.c,v 1.5 2007/05/03 01:21:32 deraadt 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/cdefs.h>
                     29: #include <sys/types.h>
                     30: #include <sys/systm.h>
                     31: #include <dev/cons.h>
                     32:
                     33: int
                     34: getsn(char *cp, int size)
                     35: {
                     36:        int len = 0, c;
                     37:        char *lp = cp;
                     38:
                     39:        while (1) {
                     40:                c = cngetc();
                     41:                switch (c) {
                     42:                case '\n':
                     43:                case '\r':
                     44:                        printf("\n");
                     45:                        *lp++ = '\0';
                     46:                        return (len);
                     47:                case '\b':
                     48:                case '\177':
                     49:                        if (len) {
                     50:                                printf("\b \b");
                     51:                                --lp;
                     52:                                --len;
                     53:                        }
                     54:                        break;
                     55:                case 'u' & 037:
                     56:                        while (len) {
                     57:                                printf("\b \b");
                     58:                                --lp;
                     59:                                --len;
                     60:                        }
                     61:                        break;
                     62:                case '\t':
                     63:                        c = ' ';
                     64:                default:
                     65:                        if (len + 1 >= size || c < ' ') {
                     66:                                printf("\007");
                     67:                                break;
                     68:                        }
                     69:                        printf("%c", c);
                     70:                        ++len;
                     71:                        *lp++ = c;
                     72:                }
                     73:        }
                     74: }