> On Aug 26, 2016, at 11:19 PM, Graham Cox <graham....@bigpond.com> wrote:
>
> Hi all,
>
> Apparently a simple task, but no obvious API for it: getting the length
> (size) of a file I have a NSFileHandle for. This class has no -length
> property, so how can I get it?
>
> I need to know because I have a requirement to create a backup copy of a file
> once it exceeds a certain size. This backup is created when I first open the
> file as a NSFileHandle. I can read the content of the file and find out the
> size that way, but I’d rather not first read it into memory if I’m just going
> to create my backup copy and then start over with an empty file - reading it
> all in just to find the length seems a bit wrong, is all.
One way would be to read the NSFileHandle's fileDescriptor property, and then
use stat(2), e.g., like so:
#include <sys/stat.h>
#include <stdlib.h>
#include <stdio.h>
int main(int argc, char *argv[])
{
struct stat buf;
stat("/etc/passwd", &buf);
printf("size = %lld\n", buf.st_size);
}
_______________________________________________
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
