ios - Restrict file Size when using freopen() -

in project, redirecting nslog data file using code

freopen([filepath cstringusingencoding:nsutf8stringencoding],"a+",stderr); 

we got issue if keep on writing data file size may increased hugely, want restrict data. lets after file size reached 2mb want clear old data , write new data.

how can it, how can check file size in run time.

for can use attributesofitematpath: method of nsfilemanager

nserror *err; nsdictionary *fileattributes = [[nsfilemanager defaultmanager] attributesofitematpath:filepath error:&err]; nsnumber *filesize           = [fileattributes objectforkey:nsfilesize];  if(//check whether size above 2 mb) {    //remove old content either removing file or clearing    [[nsfilemanager defaultmanager] removeitematpath:filepath error:&err]; } else {    //add data    freopen([filepath cstringusingencoding:nsutf8stringencoding],"a+",stderr); }