fopen returns NULL after many times do fopen and fclose, any idea?

[tvnaidu]

My program calling a function, in that function, it does fopen and fclose, after 1000 times, fopen fails, it returns NULL in LINUX OS, where as in Windows OS I cannot see this issue, Is any limitatiion for fopen and fclose in LINUX?. thanks.

[Banfa]

That is not normal behaviour on Linux, perhaps you should check the value of errno when it fails.

[donbock]

It is not uncommon for there to be a limit on the number of files that can be open at any given time. Are you sure you closed all the files that you opened?