* sysdeps/mach/hurd/ioctl.c (__ioctl): Don't clobber ARG as we copy in
argument data, since it will be used to copy out too (for INOUT).
Reported by Marcus Brinkmann <marcus@gnu.org>.
* sysdeps/mach/hurd/ioctl.c: Include <stdint.h>.
(__ioctl): Use uintptr_t instead of unsigned long int.
* sysdeps/mach/hurd/defs.c (init_stdio): Put this on __libc_subinit
rather than _hurd_fd_subinit, so it happens after it's safe to use
libc facilities like malloc.
2000-09-29 Mark Kettenis <kettenis@gnu.org>
* sysdeps/mach/hurd/dl-sysdep.c (__access): New function. Dummy
implementation for use by the dynamic linker.
2000-09-18 Mark Kettenis <kettenis@gnu.org>
* sysdeps/mach/hurd/bits/time.h: (CLOCKS_PER_SEC): Make a long int
constant since that is what clock_t is.
* sysdeps/mach/hurd/i386/bits/time.h: Likewise.
2000-09-09 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/dl-osinfo.h (DL_SYSDEP_OSCHECK): Use uname
before trying to read /proc.
Patch by Matt Wilson <msw@redhat.com>.
* include/sys/utsname.h: Declare __uname.
* sysdeps/generic/uname.c: Make uname a weak alias of __uname.
* sysdeps/mach/hurd/uname.c: Likewise.
* sysdeps/unix/syscalls.list: Likewise.
* iconv/gconv_dl.c (do_release_shlib): Rewrite condition for
unloading a bit.
2000-09-08 Ulrich Drepper <drepper@redhat.com>
* posix/getopt.c (_getopt_internal): When long_only is set always
recognize conflicts just like before.
2000-09-08 Franz Sirl <Franz.Sirl-kernel@lauterbach.com>
* sysdeps/ia64/Makefile (sysdep-rtld-routines): New variable.
2000-08-27 Bruno Haible <haible@clisp.cons.org>
* string/strxfrm.c (strxfrm, wcsxfrm): Include <sys/param.h>.
If nrules == 0 and srclen < n, copy only srclen + 1 characters.
* sysdeps/generic/getdomain.c (getdomainname): Include <sys/param.h>.
If the result is fits in the buffer, copy only as many bytes as needed.
* sysdeps/generic/_strerror.c (__strerror_r): Don't zero-fill the
buffer after copying numbuf into it.
* sysdeps/mach/_strerror.c (__strerror_r): Likewise.
2000-08-27 Bruno Haible <haible@clisp.cons.org>
* posix/confstr.c (confstr): When string_len > len, NUL-terminate
the result. When string_len < len, don't clear the rest of the buffer.
2000-08-27 Bruno Haible <haible@clisp.cons.org>
Support for new LC_COLLATE format.
* locale/coll-lookup.h: New file.
* locale/weightwc.h (findidx): When size == 0, call
collidx_table_lookup.
* wcsmbs/wcscoll.c: Include coll-lookup.h.
* wcsmbs/wcsxfrm.c: Likewise.
* posix/fnmatch.c: Likewise.
* posix/fnmatch_loop.c (internal_fnwmatch): When size == 0, call
collseq_table_lookup.
* locale/programs/3level.h: New file.
* locale/programs/ld-ctype.c: (wcwidth_table, wctrans_table): Define
by including "3level.h".
* locale/programs/ld-collate.c (wchead_table, collidx_table,
collseq_table): New types, defined by including "3level.h".
(locale_collate_t): New wcheads_3level, wcseqorder_3level fields.
(encoding_mask, encoding_byte): Remove.
(utf8_encode): Use simple shifts instead.
(collate_finish): When !oldstyle_tables, set plane_size and plane_cnt
to 0, and initialize and fill wcheads_3level and wcseqorder_3level.
(collate_output): New local variable tablewc_3level. When
!oldstyle_tables, set table_size to 0 and names to NULL and fill
tablewc_3level instead of tablewc. Change format of TABLEWC and
COLLSEQWC entries written to the file.
* locale/C-collate.c (collseqwc): Change format.
(_nl_C_LC_COLLATE): Set HASH_SIZE and HASH_LAYERS to 0, change format
of COLLSEQWC.
* locale/Makefile (distribute): Add coll-lookup.h, programs/3level.h.
2000-08-27 Bruno Haible <haible@clisp.cons.org>
* locale/programs/ld-ctype.c (MAX_CHARNAMES_IDX): New macro.
(locale_ctype_t): New charnames_idx field.
(ctype_startup): Initialize charnames_idx field.
(find_idx): Speed up dramatically by using charnames_idx inverse table.
2000-08-27 Bruno Haible <haible@clisp.cons.org>
* locale/C-ctype.c: Switch to new locale format.
(_nl_C_LC_CTYPE_names): Remove array.
(STRUCT_CTYPE_CLASS): New macro.
(_nl_C_LC_CTYPE_class_{upper,lower,alpha,digit,xdigit,space,print,
graph,blank,cntrl,punct,alnum}, _nl_C_LC_CTYPE_map_{toupper,tolower}):
New three-level tables.
(_nl_C_LC_CTYPE_width): Change from array to three-level table.
(_nl_C_LC_CTYPE): Fix nstrings value. Set HASH_SIZE and HASH_LAYERS
to 0. Change WIDTH format. Set CLASS_OFFSET and MAP_OFFSET. Add
12 class tables and 2 map tables at the end.
* ctype/ctype-info.c (_nl_C_LC_CTYPE_names): Remove declaration.
(_nl_C_LC_CTYPE_class_{upper,lower,alpha,digit,xdigit,space,print,
graph,blank,cntrl,punct,alnum}, _nl_C_LC_CTYPE_map_{toupper,tolower}):
New declarations.
(b): Remove trailing semicolon.
(__ctype_names, __ctype_width): Don't initialize.
(__ctype32_wctype, __ctype32_wctrans, __ctype32_width): Initialize.
2000-08-27 Bruno Haible <haible@clisp.cons.org>
* elf/dl-load.c (open_path): Add a argument telling whether *dirsp
is guaranteed to be allocated with the same malloc() and may be
passed to free().
(_dl_map_object): Update open_path calls. If rtld_search_dirs has
been set to empty by an earlier open_path call, don't pass it again.
2000-08-28 Mark Kettenis <kettenis@gnu.org>
* sysdeps/mach/hurd/getpeername.c (__getpeername): Renamed from
getpeername. Use ISO C style function definition.
(getpeername): Provide weak alias.
* sysdeps/mach/hurd/setrlimit.c (__setrlimit): Renamed from
setrlimit. Use ISO C style function definition.
(setrlimit): Provide weak alias.
* sysdeps/mach/hurd/xstatconv.c: New file.
* sysdeps/mach/hurd/fxstat64.c: New file.
* sysdeps/mach/hurd/lxstat64.c: New file.
* sysdeps/mach/hurd/xstat64.c: New file.
* sysdeps/mach/hurd/Dist: Add xstatconv.c.
2000-08-15 Mark Kettenis <kettenis@gnu.org>
2000-08-15 Mark Kettenis <kettenis@gnu.org>
* sysdeps/mach/hurd/dl-sysdep.c (__libc_multiple_libcs):
Initialize, needed for change in common symbol handling in newer
binutils. Mirrors 2000-01-03 change made by Andreas Schwab.
2000-08-02 Mark Kettenis <kettenis@gnu.org>
* sysdeps/mach/hurd/socketpair.c (__socketpair): Renamed from
socketpair. Made socketpair a weak alias.
* sysdeps/mach/hurd/pipe.c (__pipe): Reimplemented using
__socketpair. Use S_IFIFO protocol to make pipes POSIX
conforming, but fall back on the old protocol if the socket server
doesn't support it.
* include/sys/socket.h: Add prototype for __socketpair.
2000-07-29 Mark Kettenis <kettenis@gnu.org>
* sysdeps/mach/hurd/dl-sysdep.c (_dl_sysdep_start): Take into
acount that elf/rtld's main program might remove some varibales
from the environment if we're trying to be secure. Move the Hurd
startup data if necessary, or, if we there is no startup data,
make sure the magical convention that ARGV[0] is stored just after
the environment list.
2000-07-22 Mark Kettenis <kettenis@gnu.org>
* sysdeps/mach/hurd/brk.c (_hurd_set_brk): When shrinking the
program's data space, reallocate only the space that was just
deallocated to release its backing space.
* elf/Makefile (tests): Add nodlopen. Add rules to generate nodlopen.
* include/dlfcn.h: Define __RTLD_DLOPEN.
* elf/dl-load.c (_dl_map_object_from_fd): If DF_1_NOOPEN is set
and this is a dlopen() call, do not load the binary.
* dlfcn/dlopen.c: Add __RTLD_DLOPEN to mode passed down to _dl_open.
* dlfcn/dlopenold.c: Likewise.
* configure.in: Add test for -z nodelete option.
* config.make.in: Define have-z-nodelete with libc_cv_z_nodelete.
2000-07-20 Mark Kettenis <kettenis@gnu.org>
Make Hesiod NSS module thread-safe.
* hesiod/README.hesiod: Update.
* hesiod/Versions [GLIBC_2.2]: Add _nss_hesiod_getservbyport_r,
_nss_hesiod_setprotoent, _nss_hesiod_endprotoent,
_nss_hesiod_getprotobyname_r, and _nss_hesiod_getprotobynumber_r.
* hesiod/Makefile (libnss_hesiod-routines): Add hesiod-init and
hesiod-proto.
* hesiod/nss_hesiod/hesiod-init.c: New file.
* hesiod/nss_hesiod/hesiod-pwd.c: Rewritten for thread-safeness.
* hesiod/nss_hesiod/hesiod-grp.c: Likewise.
* hesiod/nss_hesiod/nss_hesiod.h: New file.
* hesiod/nss_hesiod/hesiod-service.c
(_nss_hesiod_getservbyport_r): New function. Provide support for
looking up services by port number.
* hesiod/nss_hesiod/hesiod-proto.c: New file.
* hesiod/hesiod.c: Update from BIND 8.2.3-T5B.
* hesiod/hesiod.h: Likewise.
* hesiod/hesiod_p.h: Likewise.
2000-07-20 Mark Kettenis <kettenis@gnu.org>
Fix problems with `struct __res_state' getting too big.
* resolv/resolv.h (struct __sockaddr_in): New definition.
(struct __res_state): Use __sockaddr_in instead of sockaddr_in in
the private parts of the structure to save some space.
* resolv/res_send.c (res_nsend): Cast &EXT(statp).nsaddrs[ns] to
(struct sockaddr_in *) in call to sock_eq.
Use memcpy to copy statp->nsaddr_list[ns] to &EXT(statp).nsaddrs[ns].
2000-07-20 Ulrich Drepper <drepper@redhat.com>
* sysdeps/mach/hurd/dl-sysdep.c: Likewise.
2000-04-19 Jakub Jelinek <jakub@redhat.com>
* locale/programs/ld-ctype.c (ctype_output): Set size of the idx
field to nelems * sizeof (uint32_t).
* locale/programs/ld-address.c (address_output): Align word fields
properly.
* locale/programs/ld-monetary.c (monetary_output): Likewise.
Don't restart idx pointers to idx end at the duo_int_curr_symbol
field.
Avoid giving arbitrary garbage in the crncystr field.
Use sizeof(uint32_t) instead of 4 for len in uno_valid_from,
uno_valid_to, duo_valid_from, duo_valid_to and conversion_rate
fields.
* locale/programs/ld-numeric.c (numeric_output): Likewise.
Don't restart idx pointers to idx end at the decimal_point_wc field.
* locale/programs/ld-time.c (time_output): week_1stday should be
word, not byte. Align it properly.
2000-04-19 H.J. Lu <hjl@gnu.org>
* csu/gmon-start.c (_start): Declared as "extern void".
(etext): Likewise.
2000-04-18 Andreas Jaeger <aj@suse.de>
* manual/install.texi (Running make install): Don't mention utmpd
anymore.
2000-04-18 Andreas Jaeger <aj@suse.de>
* linuxthreads/Versions: Use ld instead of ld.so.
* elf/Makefile (ld-map): Use ld.map.
* Versions.def: Use ld instead of ld.so.
* elf/Versions: Likewise.
* sysdeps/mach/hurd/Versions: Likewise.
* posix/getconf.c: Add support for many more POSIX options.
* sysdeps/posix/sysconf.c: Likewise.
* sysdeps/generic/bits/confname.h: Add many more POSIX options.
* sysdeps/mach/hurd/bits/posix_opt.h: Add _POSIX_REGEXP and
_POSIX_SHELL.
* sysdeps/unix/sysv/linux/bits/posix_opt.h: Likewise.
* sysdeps/unix/sysv/linux/i386/bits/time.h: Rename __CLOCK_HIGHRES to
CLOCK_PROCESS_CPUTIME_ID. Add define CLOCK_MONOTONIC and
CLOCK_THREAD_CPUTIME_ID.
* sysdeps/unix/i386/clock_getcpuclockid.c: Set *clock_id to
CLOCK_PROCESS_CPUTIME_ID.
* sysdeps/unix/i386/i586/clock_getres.c: Change for renaming of
__CLOCK_HIGHRES to CLOCK_PROCESS_CPUTIME_ID. Handle
CLOCK_THREAD_CPUTIME_ID and CLOCK_MONOTONIC the same.
* sysdeps/unix/i386/i586/clock_gettime.c: Likewise.
* sysdeps/mach/hurd/i386/init-first.c (init): Don't set __environ
here, before we might move the stack.
(posixland_init): Set __libc_argc, __libc_argc, and __environ here.
(init1): And not here.
(init1): Don't initialize __environ here, since init already does it.
(first_init): New function, broken out of _init.
(_hurd_stack_setup): Use it.
[SHARED] (_dl_init_first): New function, renamed from old _init.
(init1) [SHARED]: Don't call posixland_init here.
(posixland_init): Take ENVP arg, so signature is usual for initializer.
[SHARED] (_init): Define as alias for posixland_init.
[! SHARED] (__libc_first_init): Define as alias for posixland_init.
* sysdeps/i386/dl-machine.h (RTLD_START): Insert the macro
RTLD_START_SPECIAL_INIT before calling initializers.
(RTLD_START_SPECIAL_INIT): Define to empty if undefined.
* sysdeps/mach/hurd/i386/dl-machine.h: New file.
* sysdeps/mach/hurd/dl-sysdep.c (_dl_init_first): New weak function.
* elf/Versions ({libc,ld.so}: GLIBC_2.2): Add _dl_init_first.
* mach/Versions (libc: GLIBC_2.0)
[SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)]: Conditionalize
__vm_allocate on this.
[SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)]: Conditionalize
mutex- and spinlock-related symbols on this.
[!SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)] (libc: HURD_CTHREADS_0.3):
New version set. Lock-related symbols go here instead in this case.
* sysdeps/mach/hurd/Versions (libc: GLIBC_2.0): Remove
_cthread_exit_routine, _cthread_init_routine, cthread_keycreate,
cthread_getspecific, cthread_setspecific, __libc_getspecific.
* hurd/Versions
[SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)] (libc: GLIBC_2.0):
Put them here instead.
[!SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)] (libc: HURD_CTHREADS_0.3):
New version set. Those cthreads symbols go here instead in this case.
* Versions.def (libc) [USE_IN_LIBIO]: Add HURD_CTHREADS_0.3 version.
an initial value of 1024 instead of RLIM_INFINITY.
* Versions.def (libmachuser, libhurduser): Remove these sections,
since these libraries do not presently use symbol versions.
* sysdeps/mach/hurd/getdtsz.c (__getdtablesize): If the resource limit
is RLIM_INFINITY, return -1 instead.
* sysdeps/unix/sysv/linux/net/if.h: Moved to ...
* sysdeps/gnu/net/if.h: here.
(_IOT_ifconf, _IOT_ifreq): Hurd ioctl type macros moved from ...
* sysdeps/mach/hurd/net/if.h: ... here; this file now removed.
* sysdeps/generic/net/if.h: New file. Declares just the standard
functions and `struct if_nameindex' type.
* socket/Makefile (headers): Add net/if.h here.
* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Not here.
* sysdeps/mach/hurd/Dist: Remove it here.
* sysdeps/unix/sysv/linux/Dist: And here.
* sysdeps/generic/if_index.c: Include <net/if.h>.
2000-03-13 Roland McGrath <roland@baalperazim.frob.com>
* sysdeps/generic/lockfile.c: Include <stdio.h>
(_IO_flockfile, _IO_funlockfile, _IO_ftrylockfile): #undef these in
case <libio.h> defined them.
(__flockfile, __funlockfile, __ftrylockfile): Functions renamed
from __internal_*.
(flockfile, _IO_flockfile, funlockfile, _IO_funlockfile,
ftrylockfile, _IO_ftrylockfile): Fix aliases accordingly.
* sysdeps/generic/bits/stdio-lock.h (_IO_lock_initializer): Use ...
for more pleasing parse error.
* elf/Makefile: Add rules to compile and run constload1 test.
argument type, for 2000-02-22 change in signal/signal.h declaration.
* sysdeps/generic/getdents64.c (__getdirentries64): Renamed
to getdirentries64 (no __), since the Linux implementation
has no __ name, and there is no declaration for the __ name.
* sysdeps/mach/bits/libc-lock.h (__libc_cleanup_end): New macro.
* sysdeps/mach/hurd/Makefile ($(common-objpfx)errnos.d): Tighten up
sed regexp so as not to break directory names including /../ within.
* sysdeps/unix/bsd/bits/waitflags.h: File removed.
The sysdeps/generic file is right for BSD. This file was in fact the
Hurd file, but the only difference was the WNOREAP flag that was never
actually implemented or used anywhere.
2000-02-28 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/start.c: Initialize __errno and add comment
explaining why. Remove K&R compatibility.
* sysdeps/powerpc/fpu/s_isnan.c: Avoid using asm statement to
declare aliases.
* sysdeps/powerpc/Makefile: Always pass flags to compile for ppc
and not rs6000.
[$(subdir)=misc] (sysdep_routines): Add gprsave0, gprrest0,
gprsave1 , and gprrest1.
Don't pass special flags to compiler for init and gmon-start if
this is no ELF platform.
* sysdeps/mach/hurd/bits/statfs.h: Define _STATFS_F_NAMELEN.
* sysdeps/unix/sysv/linux/bits/statfs.h: Likewise.
* sysdeps/unix/sysv/linux/mips/bits/statfs.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/statfs.h: Likewise.
* sysdeps/posix/fpathconf.c: Don't unconditionally use f_namelen
in statfs. Check feature macro and use f_name_max or NAME_MAX
instead.
* sysdeps/posix/pathconf.c: Likewise.
* dlfcn/dlfcn.h: Remove DL_CALL_FCT definition here.
* sysdeps/generic/bits/dlfcn.h: Define DL_CALL_FCT here.
* sysdeps/mips/bits/dlfcn.h: Define DL_CALL_FCT here.
* iconv/skeleton.c: If DL_CALL_FCT is not yet defined, add dumy
definition here.
* sysdeps/generic/libc-start.c: Fix typo in comment.
* include/set-hooks.h: Allow systems to not define
symbol_set_define.
* configure.in: Unify machine names rs6000 and powerpc.
2000-01-23 Philip Blundell <philb@gnu.org>
Add basic support for RPC over IPv6:
* sunrpc/rpc/svc.h (struct SVCXPRT): Use `struct sockaddr_storage'
for remote address.
(svcudp6_create, svcudp6_bufcreate, svctcp6_create): New
prototypes.
* sunrpc/rpc/clnt.h (clnttcp6_create, clntudp6_create,
clntudp6_bufcreate): New prototypes.
* inet/netinet/in.h (bindresport6): Likewise.
* sunrpc/Makefile (routines): Add svc_tcp6, svc_udp6, bindrsvprt6.
* sunrpc/Versions: Add svcfd6_create, svctcp6_create,
svcudp6_create, svcudp6_bufcreate, svcudp6_enablecache,
bindresvport6 for GLIBC_2.2.
* sunrpc/rpc_main.c: Support `tcp6' and `udp6' transport types.
* sunrpc/rpc_svcout.c: Likewise.
* sunrpc/svc_tcp.c (rendezvous_request): Use memcpy rather than
simple assignment when copying addresses.
* sunrpc/svc_udp.c (cache_get): Likewise.
* sunrpc/svc_unix.c (rendezvous_request): Likewise.
* sunrpc/bindrsvprt6.c, sunrpc/clnt_tcp6.c, sunrpc/clnt_udp6.c,
sunrpc/svc_tcp6.c, sunrpc/svc_udp6.c: New files.
2000-01-05 Philip Blundell <philb@gnu.org>
* sysdeps/unix/sysv/linux/arm/mmap64.S: Correct check for ENOSYS.
2000-01-23 Andreas Jaeger <aj@suse.de>
* sysdeps/unix/sysv/linux/i386/fxstat.c (__fxstat): Pass right
parameter to fstat calls.
2000-01-18 Roland McGrath <roland@baalperazim.frob.com>
* sysdeps/generic/bits/socket.h
(__ss_aligntype, struct sockaddr_storage): Make these like Linux
version, replacing old type name `__ss_align'.
2000-01-05 Roland McGrath <roland@baalperazim.frob.com>
* sysdeps/generic/lseek64.c (__libc_lseek64): Renamed from __lseek64.
(__lseek64, lseek64): Make these weak aliases for __libc_lseek64.
* sysdeps/mach/hurd/lseek.c (__libc_lseek): Renamed from __lseek.
(__lseek, lseek): Make these weak aliases for __libc_lseek.
* sysdeps/mach/hurd/fcntl.c (__libc_fcntl): Renamed from __fcntl.
(__fcntl, fcntl): Make these weak aliases for __libc_fcntl.
* sysdeps/mach/hurd/open.c (__libc_open): Renamed from __open.
(__open, open): Make these weak aliases for __libc_open.
* sysdeps/generic/bits/socket.h (enum __socket_type): Remove
trailing comma.
(anonymous enum for MSG_*): Likewise.
(anonymous enum for SO_*): Likewise.
2000-01-23 Ulrich Drepper <drepper@cygnus.com>
* string/bits/string2.h: Fix typo (__GNU_SOURCE -> __USE_GNU)
(PR libc/1553).
* sysdeps/mach/hurd/setitimer.c (quantize_timeval): New function.
(setitimer_locked): Use it to quantize the timer values. Use
quantized timer values to check if the timeout changed.
* sysdeps/mach/hurd/errnos.awk: Rediddle to collect lines and print
them all at the end, eliding the final comma.
* sysdeps/mach/hurd/bits/errno.h: Regenerated.
* hurd/hurdsig.c (_hurdsig_init): If __hurd_threadvar_stack_mask is
nonzero, use cthread_fork to create the signal thread.
* hurd/msgportdemux.c (_hurd_msgport_receive): Initialize
_hurd_msgport_thread here (to self).
* sysdeps/mach/hurd/fork.c (__fork): When __hurd_sigthread_stack_end
is zero, instead compute child signal thread's starting SP from parent
signal thread's current SP and the threadvar_stack variables.
* hurd/Versions (GLIBC_2.1.3): Add cthread_fork, cthread_detach.
These are now referenced weakly by _hurdsig_init.
* hurd/report-wait.c (_S_msg_report_wait): Fix typo:
&_hurd_itimer_thread not &_hurd_msgport_thread.
1999-10-01 Roland McGrath <roland@baalperazim.frob.com>
* hurd/hurdfchdir.c (_hurd_change_directory_port_from_fd): Rewrite
without HURD_DPORT_USE to clean up warnings.
* hurd/dtable.c (get_dtable_port): Likewise.
* hurd/hurdioctl.c (rectty_dtable): Renamed to install_ctty.
(install_ctty): Do the changing of the cttyid port cell here, inside
the critical section while we holding the dtable lock.
(_hurd_setcttyid, tiocsctty, tiocnotty): Use that instead of changing
the port cell and calling rectty_dtable.
(_hurd_locked_install_cttyid): New function, split out of install_ctty.
(install_ctty): Use it inside a critical section, with the lock held.
* sysdeps/mach/hurd/setsid.c (__setsid): Use
_hurd_locked_install_cttyid to effect the cttyid and dtable changes
after proc_setsid, having held the dtable lock throughout.
* hurd/dtable.c (ctty_new_pgrp): With the dtable lock held, check the
cttyid port for null and bail out early if so. The dtable lock
serializes us after any cttyid change and its associated dtable update.
