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*/ 28*5d54f3d8Smuffin 297c478bd9Sstevel@tonic-gate #include <stdio.h> 307c478bd9Sstevel@tonic-gate #include <fcntl.h> 317c478bd9Sstevel@tonic-gate 32*5d54f3d8Smuffin extern FILE *_findiop(); 33*5d54f3d8Smuffin static FILE *_endopen(); 347c478bd9Sstevel@tonic-gate 357c478bd9Sstevel@tonic-gate FILE * 36*5d54f3d8Smuffin fopen(char *file, char *mode) 377c478bd9Sstevel@tonic-gate { 387c478bd9Sstevel@tonic-gate return (_endopen(file, mode, _findiop())); 397c478bd9Sstevel@tonic-gate } 407c478bd9Sstevel@tonic-gate 417c478bd9Sstevel@tonic-gate FILE * 42*5d54f3d8Smuffin freopen(char *file, char *mode, FILE *iop) 437c478bd9Sstevel@tonic-gate { 447c478bd9Sstevel@tonic-gate (void) fclose(iop); /* doesn't matter if this fails */ 457c478bd9Sstevel@tonic-gate return (_endopen(file, mode, iop)); 467c478bd9Sstevel@tonic-gate } 477c478bd9Sstevel@tonic-gate 487c478bd9Sstevel@tonic-gate static FILE * 49*5d54f3d8Smuffin _endopen(char *file, char *mode, FILE *iop) 507c478bd9Sstevel@tonic-gate { 51*5d54f3d8Smuffin int plus, oflag, fd; 527c478bd9Sstevel@tonic-gate 537c478bd9Sstevel@tonic-gate if (iop == NULL || file == NULL || file[0] == '\0') 547c478bd9Sstevel@tonic-gate return (NULL); 557c478bd9Sstevel@tonic-gate plus = (mode[1] == '+'); 567c478bd9Sstevel@tonic-gate switch (mode[0]) { 577c478bd9Sstevel@tonic-gate case 'w': 587c478bd9Sstevel@tonic-gate oflag = (plus ? O_RDWR : O_WRONLY) | O_TRUNC | O_CREAT; 597c478bd9Sstevel@tonic-gate break; 607c478bd9Sstevel@tonic-gate case 'a': 617c478bd9Sstevel@tonic-gate oflag = (plus ? O_RDWR : O_WRONLY) | O_APPEND | O_CREAT; 627c478bd9Sstevel@tonic-gate break; 637c478bd9Sstevel@tonic-gate case 'r': 647c478bd9Sstevel@tonic-gate oflag = plus ? O_RDWR : O_RDONLY; 657c478bd9Sstevel@tonic-gate break; 667c478bd9Sstevel@tonic-gate default: 677c478bd9Sstevel@tonic-gate return (NULL); 687c478bd9Sstevel@tonic-gate } 697c478bd9Sstevel@tonic-gate if ((fd = open(file, oflag, 0666)) < 0) 707c478bd9Sstevel@tonic-gate return (NULL); 717c478bd9Sstevel@tonic-gate iop->_cnt = 0; 727c478bd9Sstevel@tonic-gate iop->_file = fd; 737c478bd9Sstevel@tonic-gate iop->_flag = plus ? _IORW : (mode[0] == 'r') ? _IOREAD : _IOWRT; 747c478bd9Sstevel@tonic-gate if (mode[0] == 'a') { 757c478bd9Sstevel@tonic-gate if (!plus) { 767c478bd9Sstevel@tonic-gate /* if update only mode, move file pointer to the end 777c478bd9Sstevel@tonic-gate of the file */ 787c478bd9Sstevel@tonic-gate if ((lseek(fd,0L,2)) < 0) { 797c478bd9Sstevel@tonic-gate (void) close(fd); 807c478bd9Sstevel@tonic-gate return NULL; 817c478bd9Sstevel@tonic-gate } 827c478bd9Sstevel@tonic-gate } 837c478bd9Sstevel@tonic-gate } 847c478bd9Sstevel@tonic-gate iop->_base = iop->_ptr = NULL; 857c478bd9Sstevel@tonic-gate iop->_bufsiz = 0; 867c478bd9Sstevel@tonic-gate return (iop); 877c478bd9Sstevel@tonic-gate } 88