1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1989 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.4 */ 31 32 /*LINTLIBRARY*/ 33 /* 34 * Unix routine to do an "fopen" on file descriptor 35 * The mode has to be repeated because you can't query its 36 * status 37 */ 38 39 #include <stdio.h> 40 #include <sys/errno.h> 41 42 extern int errno; 43 extern long lseek(); 44 extern FILE *_findiop(); 45 46 FILE * 47 fdopen(fd, mode) 48 int fd; 49 register char *mode; 50 { 51 static int nofile = -1; 52 register FILE *iop; 53 54 if(nofile < 0) 55 nofile = getdtablesize(); 56 57 if(fd < 0 || fd >= nofile) { 58 errno = EINVAL; 59 return(NULL); 60 } 61 62 if((iop = _findiop()) == NULL) 63 return(NULL); 64 65 iop->_cnt = 0; 66 iop->_file = fd; 67 iop->_base = iop->_ptr = NULL; 68 iop->_bufsiz = 0; 69 switch(*mode) { 70 71 case 'r': 72 iop->_flag = _IOREAD; 73 break; 74 case 'a': 75 (void) lseek(fd, 0L, 2); 76 /* No break */ 77 case 'w': 78 iop->_flag = _IOWRT; 79 break; 80 default: 81 errno = EINVAL; 82 return(NULL); 83 } 84 85 if(mode[1] == '+') 86 iop->_flag = _IORW; 87 88 return(iop); 89 } 90