Annotation of sys/lib/libkern/getsn.c, Revision 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: }
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