mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/* $NetBSD: gets.c,v 1.6 1995/10/11 21:16:57 pk Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1993
|
|
* The Regents of the University of California. 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.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
|
|
*
|
|
* @(#)gets.c 8.1 (Berkeley) 6/11/93
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "stand.h"
|
|
|
|
/* gets() with constrained input length */
|
|
|
|
void
|
|
ngets(char *buf, int n)
|
|
{
|
|
int c;
|
|
char *lp;
|
|
|
|
for (lp = buf;;)
|
|
switch (c = getchar() & 0177) {
|
|
case '\n':
|
|
case '\r':
|
|
*lp = '\0';
|
|
putchar('\n');
|
|
return;
|
|
case '\b':
|
|
case '\177':
|
|
if (lp > buf) {
|
|
lp--;
|
|
putchar('\b');
|
|
putchar(' ');
|
|
putchar('\b');
|
|
}
|
|
break;
|
|
case 'r'&037: {
|
|
char *p;
|
|
|
|
putchar('\n');
|
|
for (p = buf; p < lp; ++p)
|
|
putchar(*p);
|
|
break;
|
|
}
|
|
case 'u'&037:
|
|
case 'w'&037:
|
|
lp = buf;
|
|
putchar('\n');
|
|
break;
|
|
default:
|
|
if ((n < 1) || ((lp - buf) < n - 1)) {
|
|
*lp++ = c;
|
|
putchar(c);
|
|
}
|
|
}
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
int
|
|
fgetstr(char *buf, int size, int fd)
|
|
{
|
|
char c;
|
|
int err, len;
|
|
|
|
size--; /* leave space for terminator */
|
|
len = 0;
|
|
while (size != 0) {
|
|
err = read(fd, &c, sizeof(c));
|
|
if (err < 0) /* read error */
|
|
return(-1);
|
|
if (err == 0) { /* EOF */
|
|
if (len == 0)
|
|
return(-1); /* nothing to read */
|
|
break;
|
|
}
|
|
if ((c == '\r') || /* line terminators */
|
|
(c == '\n'))
|
|
break;
|
|
*buf++ = c; /* keep char */
|
|
size--;
|
|
len++;
|
|
}
|
|
*buf = 0;
|
|
return(len);
|
|
}
|
|
|