NSPipe and NSFileHandle.

[Marko Riedel]

Hi there,

here is  an excerpt from NSPipe.m (+pipe)

if (pipe(p) == 0)
{
  readHandle = [[NSFileHandle alloc] initWithFileDescriptor: p[0]]; 
  writeHandle = [[NSFileHandle alloc] initWithFileDescriptor: p[1]];
}

So far, so good. Here is the method from  NSFileHandle.m that is
invoked. 

- (id) initWithFileDescriptor: (int)desc
{
  return [self initWithFileDescriptor: desc closeOnDealloc: NO];
}

This means that you run out of file descriptors if you open a lot of
pipes. The descriptors are not being released when the pipe is
deallocated.

Is this a bug or a feature? I found that I had to close the
descriptors manually, i.e. by using close (2) and -fileDescriptor.

Best regards, 


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