00001 /* 00002 * Copyright (C) 2001-2003 by egnite Software GmbH. All rights reserved. 00003 * 00004 * Redistribution and use in source and binary forms, with or without 00005 * modification, are permitted provided that the following conditions 00006 * are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the copyright holders nor the names of 00014 * contributors may be used to endorse or promote products derived 00015 * from this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS 00018 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00019 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 00020 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE 00021 * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 00022 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 00023 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 00024 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 00025 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00026 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 00027 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00028 * SUCH DAMAGE. 00029 * 00030 * For additional information see http://www.ethernut.de/ 00031 * 00032 */ 00033 00034 /* 00035 * $Log: filelength.c,v $ 00036 * Revision 1.6 2004/08/05 06:49:44 drsung 00037 * Now the correct value for VIRTUALDEVICEs is returned. 00038 * 00039 * Revision 1.5 2004/07/30 19:14:09 drsung 00040 * filelength implemented for VIRTUALDEVICEs using the new 00041 * global ioctl command IOCTL_GETFILESIZE. 00042 * 00043 * Revision 1.4 2004/03/16 16:48:27 haraldkipp 00044 * Added Jan Dubiec's H8/300 port. 00045 * 00046 * Revision 1.3 2003/07/20 18:24:55 haraldkipp 00047 * errno support added. 00048 * 00049 * Revision 1.2 2003/07/20 17:19:00 haraldkipp 00050 * Description and result corrected. 00051 * 00052 * Revision 1.1.1.1 2003/05/09 14:40:25 haraldkipp 00053 * Initial using 3.2.1 00054 * 00055 * Revision 1.1 2003/02/04 17:49:04 harald 00056 * *** empty log message *** 00057 * 00058 */ 00059 00060 #include "nut_io.h" 00061 00062 #include <errno.h> 00063 #include <sys/device.h> 00064 #include <io.h> 00065 00070 00079 long _filelength(int fd) 00080 { 00081 NUTFILE *fp = (NUTFILE *) ((uptr_t) fd); 00082 NUTDEVICE *dev = fp->nf_dev; 00083 long l; 00084 00085 if (dev == 0) { 00086 NUTVIRTUALDEVICE *vdv = (NUTVIRTUALDEVICE *) fp; 00087 if (vdv->vdv_ioctl && vdv->vdv_ioctl(vdv, IOCTL_GETFILESIZE, &l) == 0) 00088 return l; 00089 else { 00090 errno = EBADF; 00091 return -1; 00092 } 00093 } 00094 00095 if (dev->dev_size == 0) { 00096 errno = EBADF; 00097 return -1; 00098 } 00099 00100 return (*dev->dev_size) (fp); 00101 } 00102