1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 1989 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate /* Copyright (c) 1984 AT&T */
28*0Sstevel@tonic-gate /* All Rights Reserved */
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 3.3 */
31*0Sstevel@tonic-gate
32*0Sstevel@tonic-gate /*LINTLIBRARY*/
33*0Sstevel@tonic-gate /*
34*0Sstevel@tonic-gate * This version reads directly from the buffer rather than looping on getc.
35*0Sstevel@tonic-gate * Ptr args aren't checked for NULL because the program would be a
36*0Sstevel@tonic-gate * catastrophic mess anyway. Better to abort than just to return NULL.
37*0Sstevel@tonic-gate */
38*0Sstevel@tonic-gate #include <stdio.h>
39*0Sstevel@tonic-gate #include "stdiom.h"
40*0Sstevel@tonic-gate
41*0Sstevel@tonic-gate #define MIN(x, y) (x < y ? x : y)
42*0Sstevel@tonic-gate
43*0Sstevel@tonic-gate extern int _filbuf();
44*0Sstevel@tonic-gate extern char *memccpy();
45*0Sstevel@tonic-gate
46*0Sstevel@tonic-gate char *
fgets(ptr,size,iop)47*0Sstevel@tonic-gate fgets(ptr, size, iop)
48*0Sstevel@tonic-gate char *ptr;
49*0Sstevel@tonic-gate register int size;
50*0Sstevel@tonic-gate register FILE *iop;
51*0Sstevel@tonic-gate {
52*0Sstevel@tonic-gate char *p, *ptr0 = ptr;
53*0Sstevel@tonic-gate register int n;
54*0Sstevel@tonic-gate
55*0Sstevel@tonic-gate if ( !(iop->_flag & (_IOREAD|_IORW)) ) {
56*0Sstevel@tonic-gate iop->_flag |= _IOERR;
57*0Sstevel@tonic-gate return (NULL);
58*0Sstevel@tonic-gate }
59*0Sstevel@tonic-gate
60*0Sstevel@tonic-gate for (size--; size > 0; size -= n) {
61*0Sstevel@tonic-gate if (iop->_cnt <= 0) { /* empty buffer */
62*0Sstevel@tonic-gate if (_filbuf(iop) == EOF) {
63*0Sstevel@tonic-gate if (ptr0 == ptr)
64*0Sstevel@tonic-gate return (NULL);
65*0Sstevel@tonic-gate break; /* no more data */
66*0Sstevel@tonic-gate }
67*0Sstevel@tonic-gate iop->_ptr--;
68*0Sstevel@tonic-gate iop->_cnt++;
69*0Sstevel@tonic-gate }
70*0Sstevel@tonic-gate n = MIN(size, iop->_cnt);
71*0Sstevel@tonic-gate if ((p = memccpy(ptr, (char *) iop->_ptr, '\n', n)) != NULL)
72*0Sstevel@tonic-gate n = p - ptr;
73*0Sstevel@tonic-gate ptr += n;
74*0Sstevel@tonic-gate iop->_cnt -= n;
75*0Sstevel@tonic-gate iop->_ptr += n;
76*0Sstevel@tonic-gate _BUFSYNC(iop);
77*0Sstevel@tonic-gate if (p != NULL)
78*0Sstevel@tonic-gate break; /* found '\n' in buffer */
79*0Sstevel@tonic-gate }
80*0Sstevel@tonic-gate *ptr = '\0';
81*0Sstevel@tonic-gate return (ptr0);
82*0Sstevel@tonic-gate }
83