usbloadergx/source/usbloader/playlog.c

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/*
PLAYLOG.C
This code allows to modify play_rec.dat in order to store the
game time in Wii's log correctly.
by Marc
Thanks to tueidj for giving me some hints on how to do it :)
Most of the code was taken from here:
http://forum.wiibrew.org/read.php?27,22130
Modified by Dimok
*/
#include <stdio.h>
#include <string.h>
#include <ogcsys.h>
#include <malloc.h>
#include "gecko.h"
#include "utils/tools.h"
#define SECONDS_TO_2000 946684800LL
#define TICKS_PER_SECOND 60750000LL
//! Should be 32 byte aligned
static const char PLAYRECPATH[] ATTRIBUTE_ALIGN(32) = "/title/00000001/00000002/data/play_rec.dat";
typedef struct _PlayRec
{
u32 checksum;
union
{
u32 data[31];
struct
{
u16 name[42];
u64 ticks_boot;
u64 ticks_last;
char title_id[6];
char unknown[18];
} ATTRIBUTE_PACKED;
};
} PlayRec;
// Thanks to Dr. Clipper
static u64 getWiiTime(void)
{
time_t uTime = time(NULL);
return TICKS_PER_SECOND * (uTime - SECONDS_TO_2000);
}
int Playlog_Create(void)
{
s32 fd = IOS_Open(PLAYRECPATH, IPC_OPEN_RW);
if(fd >= 0)
{
//exists
IOS_Close(fd);
return 0;
}
ISFS_Initialize();
//In case the play_rec.dat wasn´t found create one and try again
int ret = ISFS_CreateFile(PLAYRECPATH, 0, 3, 3, 3);
if(ret >= 0)
ISFS_SetAttr(PLAYRECPATH, 0x1000, 1, 0, 3, 3, 3);
ISFS_Deinitialize();
return ret;
}
int Playlog_Update(const char * ID, const u16 * title)
{
if(!ID || !title)
return -1;
s32 fd = -1, res = -1;
u32 sum = 0;
u8 i;
//Open play_rec.dat
fd = IOS_Open(PLAYRECPATH, IPC_OPEN_RW);
if(fd == -106)
{
//In case the play_rec.dat wasn´t found create one and try again
int ret = Playlog_Create();
if(ret < 0)
return ret;
fd = IOS_Open(PLAYRECPATH, IPC_OPEN_RW);
}
if(fd < 0)
return res;
PlayRec * playrec_buf = memalign(32, ALIGN32(sizeof(PlayRec))); //! Should be 32 byte aligned
if(!playrec_buf)
{
IOS_Close(fd);
return res;
}
memset(playrec_buf, 0, sizeof(PlayRec));
u64 stime = getWiiTime();
playrec_buf->ticks_boot = stime;
playrec_buf->ticks_last = stime;
//Update channel name and ID
memcpy(playrec_buf->name, title, 84);
memcpy(playrec_buf->title_id, ID, 6);
//Calculate and update checksum
for(i = 0; i < 31; i++)
sum += playrec_buf->data[i];
playrec_buf->checksum = sum;
//Write play_rec.dat
if(IOS_Write(fd, playrec_buf, sizeof(PlayRec)) == sizeof(PlayRec))
res = 0;
IOS_Close(fd);
free(playrec_buf);
return res;
}
int Playlog_Delete(void)
{
s32 res = -1;
//Open play_rec.dat
s32 fd = IOS_Open(PLAYRECPATH, IPC_OPEN_RW);
if(fd < 0)
return fd;
PlayRec * playrec_buf = memalign(32, ALIGN32(sizeof(PlayRec)));
if(!playrec_buf)
goto cleanup;
//Read play_rec.dat
if(IOS_Read(fd, playrec_buf, sizeof(PlayRec)) != sizeof(PlayRec))
goto cleanup;
if(IOS_Seek(fd, 0, 0) < 0)
goto cleanup;
// invalidate checksum
playrec_buf->checksum = 0;
if(IOS_Write(fd, playrec_buf, sizeof(PlayRec)) != sizeof(PlayRec))
goto cleanup;
res = 0;
cleanup:
free(playrec_buf);
IOS_Close(fd);
return res;
}