10Sstevel@tonic-gate /* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 50Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 60Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 70Sstevel@tonic-gate * with the License. 80Sstevel@tonic-gate * 90Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 100Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 110Sstevel@tonic-gate * See the License for the specific language governing permissions 120Sstevel@tonic-gate * and limitations under the License. 130Sstevel@tonic-gate * 140Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 150Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 160Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 170Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 180Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 190Sstevel@tonic-gate * 200Sstevel@tonic-gate * CDDL HEADER END 210Sstevel@tonic-gate */ 220Sstevel@tonic-gate /* Copyright (c) 1984 AT&T */ 230Sstevel@tonic-gate /* All Rights Reserved */ 240Sstevel@tonic-gate 25*722Smuffin #pragma ident "%Z%%M% %I% %E% SMI" 260Sstevel@tonic-gate 270Sstevel@tonic-gate /*LINTLIBRARY*/ 280Sstevel@tonic-gate /* 290Sstevel@tonic-gate * This version reads directly from the buffer rather than looping on getc. 300Sstevel@tonic-gate * Ptr args aren't checked for NULL because the program would be a 310Sstevel@tonic-gate * catastrophic mess anyway. Better to abort than just to return NULL. 320Sstevel@tonic-gate */ 330Sstevel@tonic-gate #include <stdio.h> 340Sstevel@tonic-gate #include "stdiom.h" 35*722Smuffin #include <memory.h> 360Sstevel@tonic-gate 370Sstevel@tonic-gate extern int _filbuf(); 380Sstevel@tonic-gate 390Sstevel@tonic-gate char * 40*722Smuffin gets(char *ptr) 410Sstevel@tonic-gate { 420Sstevel@tonic-gate char *p, *ptr0 = ptr; 43*722Smuffin int n; 440Sstevel@tonic-gate 450Sstevel@tonic-gate for ( ; ; ) { 460Sstevel@tonic-gate if (stdin->_cnt <= 0) { /* empty buffer */ 470Sstevel@tonic-gate if (_filbuf(stdin) == EOF) { 480Sstevel@tonic-gate if (ptr0 == ptr) 490Sstevel@tonic-gate return (NULL); 500Sstevel@tonic-gate break; /* no more data */ 510Sstevel@tonic-gate } 520Sstevel@tonic-gate stdin->_ptr--; 530Sstevel@tonic-gate stdin->_cnt++; 540Sstevel@tonic-gate } 550Sstevel@tonic-gate n = stdin->_cnt; 560Sstevel@tonic-gate if ((p = memccpy(ptr, (char *) stdin->_ptr, '\n', n)) != NULL) 570Sstevel@tonic-gate n = p - ptr; 580Sstevel@tonic-gate ptr += n; 590Sstevel@tonic-gate stdin->_cnt -= n; 600Sstevel@tonic-gate stdin->_ptr += n; 610Sstevel@tonic-gate _BUFSYNC(stdin); 620Sstevel@tonic-gate if (p != NULL) { /* found '\n' in buffer */ 630Sstevel@tonic-gate ptr--; /* step back over '\n' */ 640Sstevel@tonic-gate break; 650Sstevel@tonic-gate } 660Sstevel@tonic-gate } 670Sstevel@tonic-gate *ptr = '\0'; 680Sstevel@tonic-gate return (ptr0); 690Sstevel@tonic-gate } 70