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/* $OpenBSD: getsn.c,v 1.7 2018/04/25 11:15:58 dlg Exp $ */
/*
* Copyright (c) 1996 Theo de Raadt
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <dev/cons.h>
size_t
getsn(char *cp, size_t size)
{
size_t len = 0;
int c;
char *lp = cp;
while (1) {
c = cngetc();
switch (c) {
case '\n':
case '\r':
printf("\n");
*lp++ = '\0';
return (len);
case '\b':
case '\177':
if (len) {
printf("\b \b");
--lp;
--len;
}
break;
case 'u' & 037:
while (len) {
printf("\b \b");
--lp;
--len;
}
break;
case '\t':
c = ' ';
default:
if (len + 1 >= size || c < ' ') {
printf("\007");
break;
}
printf("%c", c);
++len;
*lp++ = c;
}
}
}
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