13.2.12 _getpid_r—Reentrant version of getpid

Synopsis

#include <reent.h>
int _getpid_r(struct _reent *ptr);

Description
This is a reentrant version of getpid. It takes a pointer to the global data block, which holds errno.

We never need errno, of course, but for consistency we still must have the reentrant pointer argument.