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/*
* Mach Operating System
* Copyright (c) 1993-1989 Carnegie Mellon University.
* Copyright (c) 1994 The University of Utah and
* the Computer Systems Laboratory (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON, THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF
* THIS SOFTWARE IN ITS "AS IS" CONDITION, AND DISCLAIM ANY LIABILITY
* OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF
* THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#include <mach.h>
#include <device/device.h>
#include <varargs.h>
extern mach_port_t __libmach_console_port;
safe_gets(str, maxlen)
char *str;
int maxlen;
{
register char *lp;
register int c;
char inbuf[IO_INBAND_MAX];
mach_msg_type_number_t count;
register char *ip;
char *strmax = str + maxlen - 1; /* allow space for trailing 0 */
lp = str;
for (;;) {
count = IO_INBAND_MAX;
(void) device_read_inband(__libmach_console_port,
(dev_mode_t)0, (recnum_t)0,
sizeof(inbuf), inbuf, &count);
for (ip = inbuf; ip < &inbuf[count]; ip++) {
c = *ip;
switch (c) {
case '\n':
case '\r':
printf("\n");
*lp++ = 0;
return;
case '\b':
case '#':
case '\177':
if (lp > str) {
printf("\b \b");
lp--;
}
continue;
case '@':
case 'u'&037:
lp = str;
printf("\n\r");
continue;
default:
if (c >= ' ' && c < '\177') {
if (lp < strmax) {
*lp++ = c;
printf("%c", c);
}
else {
printf("%c", '\007'); /* beep */
}
}
}
}
}
}
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