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-Status of Hurd support in libc. Last updated 21 Feb 95.
-Roland McGrath <roland@gnu.ai.mit.edu>
-
-Everything not noted below is implemented, most of it tested. There are
-various very small things unfinished or thought to be perhaps wrong
-throughout the code, marked by comments containing `XXX'.
-
-
-* We are not sure about possible races between setpgrp (A, pgrp) from
- process B vs process A receiving proc_newids.
-
-* The rest of libc (stdio et al) is not safe for multithreaded programs.
- mutex locks should be added to various things.
-
-* Recovery from faults in the signal thread is not implemented yet.
-
-* longjmp needs to clean up reply port, intr_port; needs thought about.
-
-* Cooperation with cthreads is not finished. If you link with cthreads,
- libc internal code still does not use real condition variables.
- sigsuspend currently does a busy wait where it should use a condition.
- Signal state is per kernel thread; for unwired cthreads it should be per
- cthread instead.
-
-* sigaltstack/sigstack do not really work: the signal stack needs thread
- variables and cthread data set up, which is not done.
-
-* malloc is a kludge.
-
-* Resource limits do not really work; current implementation is patchy and
- inconsistent.
-
-* libc implicitly uses some environment variables. This is a security
- problem for setuid exec. Probably crt0 should remove the variables from
- the environment if setuid.
-
-* The miscellaneous msg.defs calls are only partially implemented.
-
-* The default SIGINFO handler needs to be written.
-
-* File locking is not implemented; the RPC interface is not there yet.
-
-* The current getitimer/setitimer implementation is a kludge.
-
-* mmap cannot do MAP_NOEXTEND.
-
-* Unimplemented calls (from the 4.4 system call list):
-acct
-fstatfs
-getfh
-getfsstat
-getrusage
-madvise
-mincore
-mount
-msync
-profil
-recvmsg
-revoke
-sendmsg
-sstk
-statfs
-swapon
-unmount