138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
/*****************************************************************************/
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/*
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*
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* Copyright (c) 2002, Smart Link Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. Neither the name of the Smart Link Ltd. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*
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*
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* modem_datafile.c -- modem data file stuff.
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*
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* Author: Sasha K (sashak@smlink.com)
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*
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*/
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/*****************************************************************************/
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <modem_defs.h>
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#include <modem_debug.h>
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#define DBG(fmt,args...) dprintf( fmt , ##args );
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struct datafile_record {
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unsigned minor;
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struct dsp_info dsp_info;
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unsigned size;
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};
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int datafile_load_info(char *file_name,struct dsp_info *info)
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{
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struct datafile_record *dr;
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int ret = -1;
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int fd;
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DBG("open file: %s...\n",file_name);
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fd = open(file_name, 0, 0);
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if(fd < 0) {
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DBG("cannot open '%s': %s\n",
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file_name,strerror(errno));
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return -errno;
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}
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dr = (struct datafile_record *)malloc(sizeof(*dr));
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if (!dr) {
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close(fd);
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return -errno;
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}
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ret = read(fd,(char *)dr,sizeof(*dr));
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if (ret < 0) {
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free(dr);
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close(fd);
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return -errno;
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}
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/* simple validation */
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if(dr->size != sizeof(*dr)) {
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free(dr);
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close(fd);
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return -1;
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}
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memcpy(info,&dr->dsp_info,sizeof(*info));
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free(dr);
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close(fd);
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return ret;
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}
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int datafile_save_info(char *file_name,struct dsp_info *info)
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{
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struct datafile_record *dr;
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int ret = -1;
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int fd;
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fd = open(file_name,O_CREAT|O_WRONLY,(S_IRUSR|S_IWUSR));
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if(fd < 0)
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return -errno;
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dr = (struct datafile_record *)malloc(sizeof(*dr));
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if (!dr) {
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return -errno;
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close(fd);
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}
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memcpy(&dr->dsp_info,info,sizeof(*info));
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dr->size = sizeof(*dr);
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ret = write(fd,(char *)dr,sizeof(*dr));
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free(dr);
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close(fd);
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return ret;
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}
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