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 *
fopen(char * file,char * mode)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 *
freopen(char * file,char * mode,FILE * iop)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 *
_endopen(char * file,char * mode,FILE * iop)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