mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-20 14:13:09 +00:00
0a835e4ce9
Instead of returning an uint64_t value, return a structured time stamp. This change is only visible to components using Rtc_session directly. Fixes #1381.
100 lines
2.1 KiB
C++
100 lines
2.1 KiB
C++
/*
|
|
* \brief Rtc file system
|
|
* \author Josef Soentgen
|
|
* \date 2014-08-20
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2014 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__VFS__RTC_FILE_SYSTEM_H_
|
|
#define _INCLUDE__VFS__RTC_FILE_SYSTEM_H_
|
|
|
|
/* Genode includes */
|
|
#include <rtc_session/connection.h>
|
|
#include <vfs/file_system.h>
|
|
|
|
|
|
namespace Vfs { class Rtc_file_system; }
|
|
|
|
|
|
class Vfs::Rtc_file_system : public Single_file_system
|
|
{
|
|
private:
|
|
|
|
Rtc::Connection _rtc;
|
|
|
|
public:
|
|
|
|
Rtc_file_system(Xml_node config)
|
|
:
|
|
Single_file_system(NODE_TYPE_CHAR_DEVICE, name(), config)
|
|
{ }
|
|
|
|
static char const *name() { return "rtc"; }
|
|
|
|
|
|
/*********************************
|
|
** Directory-service interface **
|
|
*********************************/
|
|
|
|
Stat_result stat(char const *path, Stat &out) override
|
|
{
|
|
Stat_result result = Single_file_system::stat(path, out);
|
|
out.mode |= 0444;
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/********************************
|
|
** File I/O service interface **
|
|
********************************/
|
|
|
|
Write_result write(Vfs_handle *, char const *, file_size,
|
|
file_size &) override
|
|
{
|
|
return WRITE_ERR_IO;
|
|
}
|
|
|
|
/**
|
|
* Read the current time from the Rtc session
|
|
*
|
|
* On each read the current time is queried and afterwards formated
|
|
* as '%Y-%m-%d %H:%M\n'.
|
|
*/
|
|
Read_result read(Vfs_handle *vfs_handle, char *dst, file_size count,
|
|
file_size &out_count) override
|
|
{
|
|
enum { TIMESTAMP_LEN = 17 };
|
|
|
|
file_size seek = vfs_handle->seek();
|
|
|
|
if (seek >= TIMESTAMP_LEN) {
|
|
out_count = 0;
|
|
return READ_OK;
|
|
}
|
|
|
|
Rtc::Timestamp ts = _rtc.current_time();
|
|
|
|
char buf[TIMESTAMP_LEN+1];
|
|
char *b = buf;
|
|
unsigned n = Genode::snprintf(buf, sizeof(buf), "%04u-%02u-%02u %02u:%02u\n",
|
|
ts.year, ts.month, ts.day, ts.hour, ts.minute);
|
|
n -= seek;
|
|
b += seek;
|
|
|
|
file_size len = count > n ? n : count;
|
|
Genode::memcpy(dst, b, len);
|
|
out_count = len;
|
|
|
|
return READ_OK;
|
|
}
|
|
};
|
|
|
|
#endif /* _INCLUDE__VFS__RTC_FILE_SYSTEM_H_ */
|