how to create a simple application that copy a file to another folder in iphone?

i need to make a simple application that copies a file to another system folder in iphone.
my aim is to make a simple application that copies a empty sms.db file onto corrupted one. so when i have a problem with the sms.db i can clean it with that app.

thanks in advance guys

I was doing something similiar in my project, here is the snippet of my code, original I was trying to use NSTask, but got some compile error, maybe you can give that a try. So eventually I just use the system() function.

/** NSTask got a compile error.
NSMutableArray *array = [NSMutableArray array];
[array addObject:[_path stringByAppendingString:_lang]];
[array addObject:_gpref];
[[NSTask launchedTaskWithLaunchPath:@"/bin/cp"
arguments:[NSArray array]] waitUntilExit];
**/

NSString *cmd = @"/bin/cp ";
cmd = [cmd stringByAppendingString:_path];
cmd = [cmd stringByAppendingString:[langDict objectForKey: _lang]];
cmd = [cmd stringByAppendingString:@" "];
cmd = [cmd stringByAppendingString:_gpref];
cmd = [cmd stringByAppendingString:@"&& launchctl stop com.apple.SpringBoard"];

NSLog(cmd);
system([cmd UTF8String]);

Can't you use MobileFinder to do this?

Cheers

i can but what i need is a kind of batch file to do this