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*/ 28*722Smuffin 290Sstevel@tonic-gate #include <stdio.h> 300Sstevel@tonic-gate #include <fcntl.h> 310Sstevel@tonic-gate 32*722Smuffin extern FILE *_findiop(); 33*722Smuffin static FILE *_endopen(); 340Sstevel@tonic-gate 350Sstevel@tonic-gate FILE * 36*722Smuffin fopen(char *file, char *mode) 370Sstevel@tonic-gate { 380Sstevel@tonic-gate return (_endopen(file, mode, _findiop())); 390Sstevel@tonic-gate } 400Sstevel@tonic-gate 410Sstevel@tonic-gate FILE * 42*722Smuffin freopen(char *file, char *mode, FILE *iop) 430Sstevel@tonic-gate { 440Sstevel@tonic-gate (void) fclose(iop); /* doesn't matter if this fails */ 450Sstevel@tonic-gate return (_endopen(file, mode, iop)); 460Sstevel@tonic-gate } 470Sstevel@tonic-gate 480Sstevel@tonic-gate static FILE * 49*722Smuffin _endopen(char *file, char *mode, FILE *iop) 500Sstevel@tonic-gate { 51*722Smuffin int plus, oflag, fd; 520Sstevel@tonic-gate 530Sstevel@tonic-gate if (iop == NULL || file == NULL || file[0] == '\0') 540Sstevel@tonic-gate return (NULL); 550Sstevel@tonic-gate plus = (mode[1] == '+'); 560Sstevel@tonic-gate switch (mode[0]) { 570Sstevel@tonic-gate case 'w': 580Sstevel@tonic-gate oflag = (plus ? O_RDWR : O_WRONLY) | O_TRUNC | O_CREAT; 590Sstevel@tonic-gate break; 600Sstevel@tonic-gate case 'a': 610Sstevel@tonic-gate oflag = (plus ? O_RDWR : O_WRONLY) | O_APPEND | O_CREAT; 620Sstevel@tonic-gate break; 630Sstevel@tonic-gate case 'r': 640Sstevel@tonic-gate oflag = plus ? O_RDWR : O_RDONLY; 650Sstevel@tonic-gate break; 660Sstevel@tonic-gate default: 670Sstevel@tonic-gate return (NULL); 680Sstevel@tonic-gate } 690Sstevel@tonic-gate if ((fd = open(file, oflag, 0666)) < 0) 700Sstevel@tonic-gate return (NULL); 710Sstevel@tonic-gate iop->_cnt = 0; 720Sstevel@tonic-gate iop->_file = fd; 730Sstevel@tonic-gate iop->_flag = plus ? _IORW : (mode[0] == 'r') ? _IOREAD : _IOWRT; 740Sstevel@tonic-gate if (mode[0] == 'a') { 750Sstevel@tonic-gate if (!plus) { 760Sstevel@tonic-gate /* if update only mode, move file pointer to the end 770Sstevel@tonic-gate of the file */ 780Sstevel@tonic-gate if ((lseek(fd,0L,2)) < 0) { 790Sstevel@tonic-gate (void) close(fd); 800Sstevel@tonic-gate return NULL; 810Sstevel@tonic-gate } 820Sstevel@tonic-gate } 830Sstevel@tonic-gate } 840Sstevel@tonic-gate iop->_base = iop->_ptr = NULL; 850Sstevel@tonic-gate iop->_bufsiz = 0; 860Sstevel@tonic-gate return (iop); 870Sstevel@tonic-gate } 88