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Write to file?

 
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Art



Joined: 09 Nov 2005
Posts: 647
PostPosted: Tue Apr 04, 2006 1:15 pm    Post subject: Write to file? Reply with quote
Code:
void read_to_ram() {
   int fd;
   int cpa = 8; //defines the position of characters of interest
   int cpb = 9; //
   int cpc = 10; //
   int cpd = 11; //

   fd = sceIoOpen("flash0:/vsh/etc/version.txt", PSP_O_RDONLY, 0777);
   sceIoRead(fd,data,256);
   sceIoClose(fd);

   printf(" PSP Unit Firmware Version Check: ");
   printf("version ");
   printf("%c",data[cpa]);
   printf("%c",data[cpb]);
   printf("%c",data[cpc]);
   printf("%c",data[cpd]);
   printf("\n");

   int fdo;
   fdo = sceIoOpen("ms0:/debug.txt", PSP_O_WRONLY | PSP_O_CREAT | PSP_O_TRUNC, 0777);
   sceIoWrite(fd,"ms0:/version.txt", 256);
   sceIoClose(fdo);
}

Hello,
I'm trying to write this file back from RAM to memory stick.
THe file reads to RAM ok, and the version number is printed to screen,
but the file that gets written to ms is a small section of my program's source code.
Cheers, Art.
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cheriff
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Joined: 23 Jun 2004
Posts: 262
Location: Sydney.au
PostPosted: Tue Apr 04, 2006 1:51 pm    Post subject: Reply with quote
sceIoWrite(fd,"ms0:/version.txt", 256);

is trying to write 256 letters of the string "ms0:/version.txt", to the file pointed to by fd, ie flash0:/vsh/etc/version.txt. Maybe it's lucky that you opened it read only then?? :)

if you just want to copy it ts ms:/xxxx then:
sceIoWrite(fdo,data, 256);

might do the trick.
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Art



Joined: 09 Nov 2005
Posts: 647
PostPosted: Tue Apr 04, 2006 2:52 pm    Post subject: Reply with quote
Thanx, that worked if I change the 256 to the actual length of the file.
I can see how that is made variable by sample software.
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Gary13579



Joined: 15 Aug 2005
Posts: 93
PostPosted: Thu Apr 06, 2006 5:23 am    Post subject: Re: Write to file? Reply with quote
Art wrote:
Code:
void read_to_ram() {
   int fd;
   int cpa = 8; //defines the position of characters of interest
   int cpb = 9; //
   int cpc = 10; //
   int cpd = 11; //

   fd = sceIoOpen("flash0:/vsh/etc/version.txt", PSP_O_RDONLY, 0777);
   sceIoRead(fd,data,256);
   sceIoClose(fd);

   printf(" PSP Unit Firmware Version Check: ");
   printf("version ");
   printf("%c",data[cpa]);
   printf("%c",data[cpb]);
   printf("%c",data[cpc]);
   printf("%c",data[cpd]);
   printf("\n");

   int fdo;
   fdo = sceIoOpen("ms0:/debug.txt", PSP_O_WRONLY | PSP_O_CREAT | PSP_O_TRUNC, 0777);
   sceIoWrite(fd,"ms0:/version.txt", 256);
   sceIoClose(fdo);
}


Umm.. why are you using version.txt? I haven't looked at the file much, but I believe the version number is stored in the index.dat file. Also, when writing to the file ms0:/debug.txt, you may want to try this
sceIoWrite(fdo, string, strlen(string));
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Art



Joined: 09 Nov 2005
Posts: 647
PostPosted: Thu Apr 06, 2006 12:58 pm    Post subject: Reply with quote
The real version number is there even when PSPset or any other program
has tricked the version.
My program makes sure it is running on 1.50 or it quits.
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