116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
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/*
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* File : log_file.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2013, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* Bernard the first version
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* 2013-06-26 Grissiom refactor
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*/
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#ifdef RT_USING_DFS
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#include <rtthread.h>
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#include <log_trace.h>
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#include <dfs_posix.h>
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struct file_device
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{
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struct rt_device parent;
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int fd;
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char *filename;
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};
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/* file device for log trace */
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static struct file_device _file_device;
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/* common device interface */
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rt_err_t fdevice_open(rt_device_t dev, rt_uint16_t oflag)
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{
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int fd;
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struct file_device *file = (struct file_device *)dev;
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if (file->fd >= 0) return -RT_EBUSY;
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fd = open(file->filename, O_RDONLY, 0);
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if (fd >= 0)
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{
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close(fd);
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/* file exists */
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fd = open(file->filename, O_WRONLY | O_APPEND, 0);
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}
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else
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{
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/* file not exists */
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fd = open(file->filename, O_WRONLY | O_CREAT, 0);
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}
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file->fd = fd;
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return RT_EOK;
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}
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rt_err_t fdevice_close(rt_device_t dev)
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{
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rt_err_t result;
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struct file_device *file = (struct file_device *)dev;
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if (file->fd < 0) return -RT_EBUSY;
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result = close(file->fd);
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if (result == 0)
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{
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file->fd = -1;
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}
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return result;
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}
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rt_size_t fdevice_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
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{
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struct file_device *file = (struct file_device *)dev;
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if (file->fd < 0) return 0;
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return write(file->fd, buffer, size);
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}
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void log_trace_file_init(const char *filename)
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{
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rt_device_t device;
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device = rt_device_find("logfile");
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if (device == RT_NULL)
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{
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rt_memset(&_file_device, 0x00, sizeof(_file_device));
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_file_device.parent.type = RT_Device_Class_Char;
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_file_device.parent.init = RT_NULL;
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_file_device.parent.open = fdevice_open;
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_file_device.parent.close = fdevice_close;
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_file_device.parent.write = fdevice_write;
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rt_device_register(&_file_device.parent, "logfile", O_RDWR);
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}
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_file_device.filename = rt_strdup(filename);
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_file_device.fd = -1;
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}
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#endif // RT_USING_DFS
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