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: open.c,v $ 00036 * Revision 1.4 2006/03/16 15:25:20 haraldkipp 00037 * Changed human readable strings from u_char to char to stop GCC 4 from 00038 * nagging about signedness. 00039 * 00040 * Revision 1.3 2004/03/16 16:48:27 haraldkipp 00041 * Added Jan Dubiec's H8/300 port. 00042 * 00043 * Revision 1.2 2003/08/05 20:01:55 haraldkipp 00044 * Typing errors corrected 00045 * 00046 * Revision 1.1.1.1 2003/05/09 14:40:30 haraldkipp 00047 * Initial using 3.2.1 00048 * 00049 * Revision 1.1 2003/02/04 17:49:08 harald 00050 * *** empty log message *** 00051 * 00052 */ 00053 00054 #include "nut_io.h" 00055 00056 #include <errno.h> 00057 #include <sys/device.h> 00058 00063 00064 00083 int _open(CONST char *name, int mode) 00084 { 00085 NUTDEVICE *dev; 00086 char dev_name[9]; 00087 u_char nidx; 00088 CONST char *nptr = name; 00089 00090 /* 00091 * Extract device name. 00092 */ 00093 for (nidx = 0; *nptr && *nptr != ':' && nidx < 8; nidx++) { 00094 dev_name[nidx] = *nptr++; 00095 } 00096 dev_name[nidx] = 0; 00097 00098 /* 00099 * Get device structure of registered device. In later releases we 00100 * try to open a file on a root device. 00101 */ 00102 if ((dev = NutDeviceLookup(dev_name)) == 0) { 00103 errno = ENOENT; 00104 return -1; 00105 } 00106 00107 /* 00108 * We should check, if the mode flags are device conformant. 00109 */ 00110 00111 /* 00112 * If a device name was specified, open this device. Otherwise open 00113 * a file on the device. 00114 */ 00115 if (*nptr++ != ':') 00116 nptr = 0; 00117 return (int) ((uptr_t) ((*dev->dev_open) (dev, nptr, mode, 0))); 00118 } 00119