17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 227c478bd9Sstevel@tonic-gate /* Copyright (c) 1984 AT&T */ 237c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 247c478bd9Sstevel@tonic-gate 25*5d54f3d8Smuffin #pragma ident "%Z%%M% %I% %E% SMI" 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate /*LINTLIBRARY*/ 287c478bd9Sstevel@tonic-gate /* 297c478bd9Sstevel@tonic-gate * This version reads directly from the buffer rather than looping on getc. 307c478bd9Sstevel@tonic-gate * Ptr args aren't checked for NULL because the program would be a 317c478bd9Sstevel@tonic-gate * catastrophic mess anyway. Better to abort than just to return NULL. 327c478bd9Sstevel@tonic-gate */ 337c478bd9Sstevel@tonic-gate #include <stdio.h> 347c478bd9Sstevel@tonic-gate #include "stdiom.h" 35*5d54f3d8Smuffin #include <memory.h> 367c478bd9Sstevel@tonic-gate 377c478bd9Sstevel@tonic-gate extern int _filbuf(); 387c478bd9Sstevel@tonic-gate 397c478bd9Sstevel@tonic-gate char * 40*5d54f3d8Smuffin gets(char *ptr) 417c478bd9Sstevel@tonic-gate { 427c478bd9Sstevel@tonic-gate char *p, *ptr0 = ptr; 43*5d54f3d8Smuffin int n; 447c478bd9Sstevel@tonic-gate 457c478bd9Sstevel@tonic-gate for ( ; ; ) { 467c478bd9Sstevel@tonic-gate if (stdin->_cnt <= 0) { /* empty buffer */ 477c478bd9Sstevel@tonic-gate if (_filbuf(stdin) == EOF) { 487c478bd9Sstevel@tonic-gate if (ptr0 == ptr) 497c478bd9Sstevel@tonic-gate return (NULL); 507c478bd9Sstevel@tonic-gate break; /* no more data */ 517c478bd9Sstevel@tonic-gate } 527c478bd9Sstevel@tonic-gate stdin->_ptr--; 537c478bd9Sstevel@tonic-gate stdin->_cnt++; 547c478bd9Sstevel@tonic-gate } 557c478bd9Sstevel@tonic-gate n = stdin->_cnt; 567c478bd9Sstevel@tonic-gate if ((p = memccpy(ptr, (char *) stdin->_ptr, '\n', n)) != NULL) 577c478bd9Sstevel@tonic-gate n = p - ptr; 587c478bd9Sstevel@tonic-gate ptr += n; 597c478bd9Sstevel@tonic-gate stdin->_cnt -= n; 607c478bd9Sstevel@tonic-gate stdin->_ptr += n; 617c478bd9Sstevel@tonic-gate _BUFSYNC(stdin); 627c478bd9Sstevel@tonic-gate if (p != NULL) { /* found '\n' in buffer */ 637c478bd9Sstevel@tonic-gate ptr--; /* step back over '\n' */ 647c478bd9Sstevel@tonic-gate break; 657c478bd9Sstevel@tonic-gate } 667c478bd9Sstevel@tonic-gate } 677c478bd9Sstevel@tonic-gate *ptr = '\0'; 687c478bd9Sstevel@tonic-gate return (ptr0); 697c478bd9Sstevel@tonic-gate } 70