Cpwd - LCG Password file Thread-Safe inferface
       #include <Cpwd.h>
       struct passwd *Cgetpwnam(char *name);
       struct passwd *Cgetpwuid(uid_t uid);
       If  the Cthread interface is chosen and activated, the errors value are
       in the serrno variable.
       Cpwd is a common Thread-Safe  API  interface  to  get  entries  in  the
       password file vs.  name or uid.
       serrno, getpwnam, getpwuid
       LCG Grid Deployment Team