Update.cvs/libc-ud-970810

1997-08-10 18:48  Ulrich Drepper  <drepper@cygnus.com>

	* Makeconfig: Define build-programs to no if not set and $(config-os)
	is none.
	* Makerules (+depfiles): Don't add $(others) if not build-programs.
	* Rules (others): Don't depend on $(install-bin), $(install-rootbin)
	and $(install-sbin) if not build-programs.
	* Makefile (subdirs): Remove login.
	* sysdeps/mach/hurd/Subdirs: Add login.
	* sysdeps/unix/Subdirs: Add login.

	* sysdeps/generic/sys/mman.h: Test feature macros before defining
	non-POSIX things.  Add MAP_FAILED.
	* sysdeps/unix/bsd/osf/sys/mman.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/sys/mman.h: Likewise.
	* sysdeps/unix/bsd/ultrix4/sys/mman.h: Likewise.
	* sysdeps/unix/sysv/irix4/sys/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/sys/mman.h: Rewrite to not use kernel header
	but bits/mman.h.  Test feature macros before definitions non-POSIX
	functions.
	* sysdeps/unix/sysv/linux/alpha/bits/mman.h: New file.
	* sysdeps/unix/sysv/linux/i386/bits/mman.h: New file.
	* sysdeps/unix/sysv/linux/m68k/bits/mman.h: New file.
	* sysdeps/unix/sysv/linux/mips/bits/mman.h: New file.
	* sysdeps/unix/sysv/linux/powerpc/bits/mman.h: New file.
	* sysdeps/unix/sysv/linux/sparc/bits/mman.h: New file.
	* sysdeps/unix/sysv/linux/sparc64/bits/mman.h: New file.
	* sysdeps/unix/sysv/linux/alpha/Dist: Add bits/mman.h.
	* sysdeps/unix/sysv/linux/i386/Dist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/Dist: Likewise.
	* sysdeps/unix/sysv/linux/mips/Dist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/Dist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/Dist: Likewise.
	* sysdeps/unix/sysv/linux/sparc64/Dist: New file.  Likewise.

	* catgets/open_catalog.c (__open_catalog): Compare result of mmap
	with MAP_FAILED and not -1.
	* elf/dl-load.c (_dl_map_object_from_fd): Likewise.
	* elf/dl-minimal.c (malloc): Likewise.
	* elf/dl-misc.c (_dl_sysdep_read_whole_file): Likewise.
	* locale/loadlocale.c (_nl_load_locale): Likewise.
	* locale/programs/localedef.c: Likewise.
	* malloc/malloc.c (mmap_chunk): Likewise.
	(new_heap): Likewise.
	* string/stratcliff.c: Likewise.
	* string/tester.c: Add tests for stpcpy.

	* gmon/gmon.c (__monstartup): Use calloc instead of malloc+memset.

	* gmon/sys/gmon.h: Add prototype for write_profiling.

	* elf/dl-profile.c: Add decsriptions and implement reading of
	existing data in profiling file.
	* gmon/sys/gmon_out.h (GMON_SHOBJ_VERSION): New macro for shared
	lib profiling data.

	* sysdeps/stub/bits/libc-lock.h (__libc_once_define): Add new first
	parameter for class.

	* inet/inet_ntoa.c: Make once control variable static.
	Correctly handle case where key cannot be retrieved.
	* inet/Makefile (tests): Add tst-ntoa.
	* inet/tst-ntoa.c: New file.

	* manual/time.texi: Document localtime_r, gmtime_r, asctime_r, and
	ctime_r.
	Mention that tzname values must not be changed.

	* manual/users.texi: Document UTMP/WTMP handling functions.
	Mainly written by Mark Kettenis.

	* math/libm-test.c (cbrt_test): Add test for number with aboslute
	value < 1.0.

	* nss/nss_files/files-XXX.c (internal_setent): If opening of file
	failed with EGAIN return NSS_STATUS_TRYAGAIN.
	* nss/nss_files/files-alias.c (internal_setent): Likewise.

	* sysdeps/generic/bits/utmp.h: Pretty print.

	* sysdeps/i386/i586/strcpy.S: New file.  Much faster implementation.
	* sysdeps/i386/i586/stpcpy.S: New file.
	* sysdeps/i386/i686/Implies: Don't fall back on i586 versions since
	these are less efficient than i486/i386 versions.

	* sysdeps/libm-i387/e_rem_pio2.c: Add empty file to prevent the
	version from libm-ieee754 be compiled since the later is not needed.
	* sysdeps/libm-i387/e_rem_pio2f.c: Likewise.
	* sysdeps/libm-i387/e_rem_pio2l.c: Likewise.
	* sysdeps/libm-i387/k_rem_pio2.c: Likewise.
	* sysdeps/libm-i387/k_rem_pio2f.c: Likewise.
	* sysdeps/libm-i387/k_rem_pio2l.c: Likewise.
	* sysdeps/m68k/fpu/e_rem_pio2.c: Likewise.
	* sysdeps/m68k/fpu/e_rem_pio2f.c: Likewise.
	* sysdeps/m68k/fpu/e_rem_pio2l.c: Likewise.
	* sysdeps/m68k/fpu/k_rem_pio2.c: Likewise.
	* sysdeps/m68k/fpu/k_rem_pio2f.c: Likewise.
	* sysdeps/m68k/fpu/k_rem_pio2l.c: Likewise.

	* sysdeps/libm-i387/s_cbrt.S: Fix several bugs.
	* sysdeps/libm-i387/s_cbrtf.S: Likewise.
	* sysdeps/libm-i387/s_cbrtl.S: Likewise.

	* sysdeps/unix/sysv/linux/if_index.c (if_indextoname): Correct
	little bug.

	* sysdeps/unix/sysv/linux/bits/socket.h (struct msghdr): Make field
	msg_iovlen of type int.

	* time/tzfile.c: Change return type of __tzstring to char *.
	* time/tzset.c: Likewise.  Change definition of __tzstring.

	* time/tzset.c: Interpret no DST information in user provided time
	zone specification as it is meant: no DST.
	Patch by Paul Eggert <eggert@twinsun.com>.

1997-07-20 03:01  Geoff Keating  <geoffk@ozemail.com.au>

	* sysdeps/elf/dl-load.c (add_name_to_object): New procedure.
	(_dl_map_object_from_fd): Use add_name_to_object.
	(_dl_map_object): If an object's SONAME is used to resolve a
	dependency, add it to the list of the object's names.

	* inet/getnameinfo.c: Make `domain' non-const.

	* sysdeps/unix/sysv/linux/powerpc/kernel_termios.c: Clean up.

	* math/test-fenv.c (feenv_nomask_test): Don't execute if
	FE_NOMASK_ENV is not defined, or if fesetenv(FE_NOMASK_ENV)
	sets errno to ENOSYS.

	* sysdeps/powerpc/dl-machine.h: Print proper error message on
	unknown reloc type (rather than using assert).

	* sysdeps/unix/sysv/linux/powerpc/profil-counter.h: New file.
	* sysdeps/unix/sysv/linux/powerpc/profil.c: Deleted.

1997-07-16 12:47  Geoff Keating  <geoffk@ozemail.com.au>

	* sysdeps/powerpc/bits/fenv.h (feraiseexcept): New optimising macro.
	(feclearexcept): New optimising macro.
	(FE_NOMASK_ENV): Change to procedure so it can enable exceptions.
	(FE_ENABLED_ENV): Add.
	(FE_NONIEEE_ENV): Add.
	* sysdeps/powerpc/bits/fenv_const.c: Add __fe_enabled_env,
	__fe_nonieee_env; delete __fe_nomask_env.
	* sysdeps/powerpc/bits/fe_nomask.c: New file (stub warning until it
	gets implemented in the kernel).

	* sysdeps/powerpc/fraiseenv.c: Deal with chips that don't have
	FE_INVALID_SOFTWARE implemented. Use macros for bit names for clarity.
	* sysdeps/powerpc/fsetexcptflag.c: Likewise.

	* io/ftw.c: Don't compare holes in structures.
	* sysdeps/unix/sysv/linux/sys/sysmacros.h: Cast the result of the
	macros to `int', because otherwise it might be `long long' which
	the calling code is probably not expecting.

	* sysdeps/libm-ieee754/s_lround.c [NO_LONG_DOUBLE]: Fix a few bugs,
	document the existence of some more.

	* sysdeps/powerpc/s_llrint.c: New file.
	* sysdeps/powerpc/s_lrint.c: New file.
	* sysdeps/powerpc/s_llround.c: New file.
	* sysdeps/powerpc/s_lround.c: New file.

	* sysdeps/powerpc/s_sqrt.c: New file.
	* sysdeps/powerpc/s_sqrtf.c: New file.
	* sysdeps/powerpc/w_sqrt.s: New empty file.
	* sysdeps/powerpc/w_sqrtf.s: New empty file.
	* sysdeps/powerpc/t_sqrt.c: New file.
	* sysdeps/powerpc/test-arithf.c: New file.
	* sysdeps/powerpc/Makefile [subdir=math]: Add t_sqrt to support
	routines.  Add test-arithf to test programs.

	* sysdeps/powerpc/bits/mathdef.h: Add FP_ILOGB0, FP_ILOGBNAN.

	* sysdeps/powerpc/strcmp.s: Simplify drastically. Now much neater,
	and possibly faster (or possibly slower, depending on input).

1997-06-08 22:55  Geoff Keating  <geoffk@ozemail.com.au>

	* sysdeps/powerpc/fenvbits.h: Correct FE_DFL_ENV and FE_NOMASK_ENV
	macros.
	* sysdeps/powerpc/s_rint.c: New file.

1997-05-22 08:47  Geoff Keating  <geoffk@ozemail.com.au>

	* sysdeps/powerpc/Makefile [subdir=math]: Add q_* routines.
	* sysdeps/powerpc/Dist: Add quad_float.h.
	* sysdeps/powerpc/q_dtoq.c: New file.
	* sysdeps/powerpc/q_itoq.c: New file.
	* sysdeps/powerpc/q_lltoq.c: New file.
	* sysdeps/powerpc/q_neg.c: New file.
	* sysdeps/powerpc/q_qtoi.c: New file.
	* sysdeps/powerpc/q_qtoll.c: New file.
	* sysdeps/powerpc/q_qtos.c: New file.
	* sysdeps/powerpc/q_qtou.c: New file.
	* sysdeps/powerpc/q_qtoull.c: New file.
	* sysdeps/powerpc/q_stoq.c: New file.
	* sysdeps/powerpc/q_ulltoq.c: New file.
	* sysdeps/powerpc/q_utoq.c: New file.
	* sysdeps/powerpc/quad_float.h: New file.
	* sysdeps/powerpc/test-arith.c: New file.

	* sysdeps/powerpc/fpu_control.h: Fix _FPU_GETCW.
	* sysdeps/powerpc/fegetround.c: Use mcrfs to be faster and not
	require a stack frame.
	* sysdeps/powerpc/bits/fenv.h: Include inline macro for fegetround.

1997-05-18 05:55  Geoff Keating  <geoffk@ozemail.com.au>

	* sysdeps/powerpc/fenv_libc.h (fegetenv_register,
	fesetenv_register): Add 'volatile'.
	(set_fpscr_bit, reset_fpscr_bit): New macros, FPSCR_*
	constants to use with them.
	* sysdeps/powerpc/s_copysign.S: New file.
	* sysdeps/powerpc/s_copysignf.s: New file.
	* sysdeps/powerpc/s_fabs.S: New file.
	* sysdeps/powerpc/s_fabsf.s: New file.
	* sysdeps/powerpc/s_isnan.c: New file.
	* sysdeps/powerpc/s_isnanf.s: New file.
	* sysdeps/powerpc/s_rintf.c: New file.

	* sysdeps/powerpc/fenvbits.h: Make FE_INVALID the summary
	bit in the FPSCR, not the enable bit.
	* sysdeps/powerpc/fraiseexcpt.c: Consequent change to the above.
	* sysdeps/powerpc/fclrexcpt.c: Correct.
	* sysdeps/powerpc/fsetexcptflag.c: Correct.
	* sysdeps/powerpc/ftestexcpt.c: Is now much simpler.
	* sysdeps/powerpc/fgetexcptflg.c: Simplify.

	* sysdeps/powerpc/strlen.s: Schedule better, save 3 clocks :-).

	* sysdeps/powerpc/dl-machine.h (elf_machine_rela): Add comment
	explaining some reentrancy issues with lazy PLT entries.

1997-08-09 13:04  Mark Kettenis  <kettenis@phys.uva.nl>

	* login/logout.c (logout): utmpname returns -1 on error.

	* login/libutil.map: Remove updwtmp.

	* login/getutline.c: Rename getutline to __getutline and make
	getutline a weak alias.  Make getutxline a weak alias for
	__getutline.
	* login/getutid.c: Rename getutid to __getutid and make getutid a
	weak alias.  Make getutxid a weak alias for __getutid.
	* libc.map: Add getutxid, getutxline.

	* login/utmpname.c (__utmpname): Reset backend right after backend
	endutent call.
	* login/utmp_file.c: Reordered functions.  Remove unecessary
	header files.
	(getutent_r_file, pututline_file): Do not call setutent_file.  At this
	point the file is guaranteed to be open (assert!).
	(getutid_r_file, getutline_r_file): Remove check for validity of file
	descriptor.  At this point the file is guaranteed to be open.
	(getutent_r_file, internal_getut_r, getutline_r_file, pututline_file,
	updwtmp_file): Do not wait when unlocking file.
	* login/utmp_daemon.c: General cleanup and a bit of reordering.
	(getutent_r_daemon, pututline_daemon): Do not call setutent_daemon.
	At this point the socket is guaranteed to be open (assert!).
	(getutid_r_daemon, getutline_r_daemon): Do not check if daemon_sock is
	valid.  At this point the socket is guaranteed to be open (assert!).
	* login/getutline_r.c: Remove unnecessary header files.
	(__getutline_r): Do not call backend setutent.
	* login/getutid_r.c: Remove unnecessary header files.
	(__getutid_r): Do not call backend setutent.
	* login/getutent_r.c: Remove unneccesary header files.
	(__libc_utmp_unknown_functions): Added getutid_r_unknown,
	getutline_r_unknown.
	(setutent_unknown): Only set file backend if setutent for the file
	backend was successful.
	(getutent_r_unknown, pututline_unknown): Call setutent_unknown instead
	of __setutent.  Report failure if no backend was selected.
	(getutid_r_unknown): New function.
	(getutline_r_unknown): New function.
	(__endutent): Reset backend.  This makes sure all backends are checked
	on the next setutent call.

1997-08-08 20:20  Thorsten Kukuk  <kukuk@vt.uni-paderborn.de>

	* nis_cache.c: Replace dummy functions.

	* libc.map: Add xdr_sizeof symbol.

	* sunrpc/Makefile: Add xdr_sizeof to routines.
	* sunrpc/rpc/xdr.h: Add xdr_sizeof prototype.
	* sunrpc/xdr_sizeof.c: New, from tirpc 2.3.

1997-08-08  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* sysdeps/mach/bits/libc-lock.h (__libc_once): Define correctly.

1997-08-07  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* sysdeps/mach/hurd/profil.c (fetch_samples): Put parens in the
	right place.

1997-08-06  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* sysdeps/mach/hurd/profil.c (fetch_samples): Do arithmetic on
	PC's in long long to avoid overflow.

1997-08-07  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* sysdeps/mach/bits/libc-lock.h (__libc_once, __libc_once_define):
	New macros.

1997-08-06  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* nis/Makefile (headers): Remove bits/nislib.h.

1997-08-06 14:54  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/mach/hurd/Subdirs: Add login.

1997-08-06 14:23  Klaus Espenlaub  <kespenla@hydra.informatik.uni-ulm.de>

	* db/hash/hash.c (init_hash): Don't use stat() if it doesn't provide
	the preferred block size.

	* login/programs/database.c (store_state_entry): Don't compile if
	there is no ut_type field.
	(store_state_entry, store_process_entry): Use the ut_tv field
	for timestamps if supported.

	* login/programs/utmpdump.c (print_entry): Always use ut_tv field.

	* login/programs/xtmp.c: Fix numerous xtmp/utmp typos.  Use the ut_tv
	field for timestamps if supported.

	* login/programs/xtmp.h: Fix xtmp/utmp typo.

	* sysdeps/posix/defs.c (stdstream): Change (PTR) to (void *).

	* sysdeps/stub/connect.c (connect): Change to __connect, add alias.
	* sysdeps/stub/send.c (send): Likewise.
	* sysdeps/stub/s_exp2f.c: Emit correct stub_warning().
	* sysdeps/stub/statfs.c: Move stub_warning() to the usual place.
	* sysdeps/stub/init-first.c: Add definition of __libc_pid.

1997-08-05 13:28  Philip Blundell  <pb@spring.nexus.co.uk>

	* sysdeps/standalone/arm/bits/errno.h: Add EISDIR, EOPNOTSUPP;
	tidy up formatting.

	* Makefile (subdirs): Remove `login'.
	* sysdeps/unix/Subdirs: New file; build `login' subdirectory
	for Unix systems.

1997-08-05  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/generic/bits/utmpx.h: New file.

	* sysdeps/mach/hurd/Dist: Add some files.
	* sysdeps/mips/Dist: Likewise.
	* sysdeps/mips/mips64/Dist: Likewise.
	* sysdeps/sparc/Dist: Likewise.
	* sysdeps/unix/sysv/linux/mips/Dist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/Dist: Likewise.
	* sysdeps/mips/mipsel/Dist: New file.
	* sysdeps/sparc64/elf/Dist: New file.
	* sysdeps/unix/sysv/linux/sparc64/Dist: New file.

1997-08-05  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* libc.map: Add missing symbols.

1997-08-05  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* manual/socket.texi: Correct typos.

	* manual/math.texi: Correct typos.

	* manual/time.texi (Formatting Date and Time): Likewise.

1997-08-04 13:06  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* gmon/gmon.c (write_gmon): New function; guts from _mcleanup.
	(_mcleanup): Use write_gmon.
	(write_profiling): This function can be safely called at any time
	to write a current histogram without interfering with ongoing
	profiling.

	* sysdeps/mach/hurd/profil.c (fetch_samples): Initialize NSAMPLES.

1997-08-01 17:53  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* sysdeps/mach/hurd/profil.c (fetch_samples): Sample buffer need
	not be vm_deallocated; it's a stack buffer.
	(profil_vm_deallocate): Delete prototype.
	(#include <../mach/RPC_vm_deallocate_rpc.c>): Drop this
	inclusion.
	* sysdeps/mach/hurd/Makefile
	($(common-objpfx)hurd/../mach/RPC_vm_deallocate_rpc.c): Delete
	this rule.

	* sysdeps/mach/hurd/profil.c (fetch_samples): New function, guts
	from profile_waiter.
	(profile_waiter): Use fetch_samples.
	(profil): When turning off profiling, fetch the last bunch of
	samples before disabling PC sampling.
	(fetch_samples): Add prototype.

1997-07-30 12:53  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* sysdeps/mach/hurd/Makefile: Give normal rules for the mach RPC
	source included by profil.c instead of trying to use
	before-compile grot.

1997-07-23 15:04  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* sysdeps/mach/hurd/profil.c (profile_waiter): Do vm_deallocate
	after releasing lock.  Use special RPC stubs and avoid assert,
	thus making this function entirely independent of the threadvar
	mechanism and of cthreads.
	(lock): Convert to be a spin lock instead of a mutex, so that the
	waiter thread need not use cthreads.  Use a fork prepare hook
	instead of _hurd_fork_locks to make sure we are clean before
	forking.
	(fork_profil_child): Renamed from fork_profil.
	(profil_reply_port): New variable.
	(profil_vm_deallocate, profil_task_get_sampled_pcs): Special RPC
	stubs made by special hacks.
	* sysdeps/mach/hurd/Makefile (before-compile): Add the mach RPC
	source files that profil.c needs if we are in the gmon directory.

	* mach/setup-thread.c (__mach_setup_thread): Delete avoidance of a
	cthreads bug that hasn't existed for two years.

	* stdio-common/printf_fp.c (__printf_fp): Correct rounding of numbers
	* locale/programs/locale.c (print_escaped): New function.
	* time/australasia: Likewise.
	(open_database, synchronize_database, initialize_database):
	* nss/nss_files/files-netgrp.c (_nss_netgroup_parseline): Don't
	* Makerules (load-map-file): Currectly handle missing map file.
	cannot rely on M_SQRT2 being defined.
	(log1p): Use __M_SQRT2 not M_SQRT2.

3 files changed, 271 insertions, 8 deletions

diff --git a/nis/Banner b/nis/Banner
index 77ab77e..3a1729c 100644
--- a/nis/Banner
+++ b/nis/Banner
@@ -1 +1 @@
-NIS(YP)/NIS+ NSS modules 0.12 by Thorsten Kukuk
+NIS(YP)/NIS+ NSS modules 0.13 by Thorsten Kukuk
diff --git a/nis/Makefile b/nis/Makefile
index 7c70c9c..e7dd50c 100644
--- a/nis/Makefile
+++ b/nis/Makefile
@@ -21,7 +21,7 @@
 #
 subdir	:= nis
 
-headers			:= $(wildcard rpcsvc/*.[hx]) bits/nislib.h
+headers			:= $(wildcard rpcsvc/*.[hx])
 distribute		:= nss-nis.h nss-nisplus.h nis_intern.h Banner \
 			nisplus-parser.h
 
diff --git a/nis/nis_cache.c b/nis/nis_cache.c
index 8e1d583..4c0ea7b 100644
--- a/nis/nis_cache.c
+++ b/nis/nis_cache.c
@@ -20,25 +20,288 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <syslog.h>
+#include <string.h>
 #include <sys/stat.h>
 #include <sys/mman.h>
 #include <rpcsvc/nis.h>
-#include <rpcsvc/nislib.h>
 #include <rpcsvc/nis_cache.h>
 #include <bits/libc-lock.h>
 
 #include "nis_intern.h"
 
-/* XXX Only dummy functions in the moment. The real implementation
-       will follow, if we have a working nis_cachemgr */
+static struct timeval TIMEOUT = {10, 0};
+
+#define HEADER_MAGIC  0x07021971
+#define SPACER_MAGIC  0x07654321
+
+#define CACHE_VERSION 0x00000001
+
+struct cache_header
+{
+  u_long magic;               /* Magic number */
+  u_long vers;                /* Cache file format version */
+  u_short tcp_port;           /* tcp port of nis_cachemgr */
+  u_short udp_port;           /* udp port of nis_cachemgr */
+  u_long entries;             /* Number of cached objs. */
+  off_t used;                 /* How many space are used ? */
+};
+typedef struct cache_header cache_header;
+
+struct cache_spacer
+{
+  u_long magic;                /* Magic number */
+  u_long hashval;
+  time_t ctime;                /* time we have created this object */
+  time_t ttl;                  /* time to life of this object */
+  off_t next_offset;
+};
+typedef struct cache_spacer cache_spacer;
+
+static int cache_fd = -1;
+static int clnt_sock;
+static caddr_t maddr = NULL;
+static size_t msize;
+static CLIENT *cache_clnt = NULL;
+
+/* If there is no cachemgr, we shouldn't use NIS_SHARED_DIRCACHE, if
+   there is no NIS_SHARED_DIRCACHE, we couldn't use nis_cachemgr.
+   So, if the clnt_call to nis_cachemgr fails, we also close the cache file.
+   But another thread could read the cache => lock the cache_fd and cache_clnt
+   variables with the same lock */
+__libc_lock_define_initialized (static, mgrlock)
+
+/* close file handles and nis_cachemgr connection */
+static void
+__cache_close (void)
+{
+  if (cache_fd != -1)
+    {
+      close (cache_fd);
+      cache_fd = -1;
+    }
+  if (cache_clnt != NULL)
+    {
+      clnt_destroy (cache_clnt);
+      close (clnt_sock);
+      cache_clnt = NULL;
+    }
+}
+
+/* open the cache file and connect to nis_cachemgr */
+static bool_t
+__cache_open (void)
+{
+  struct sockaddr_in sin;
+  cache_header hptr;
+
+  if ((cache_fd = open (CACHEFILE, O_RDONLY)) == -1)
+    return FALSE;
+
+  if (read (cache_fd, &hptr, sizeof (cache_header)) == -1
+      || lseek (cache_fd, 0, SEEK_SET) < 0)
+    {
+      close (cache_fd);
+      cache_fd = -1;
+      return FALSE;
+    }
+  if (hptr.magic != HEADER_MAGIC)
+    {
+      close (cache_fd);
+      cache_fd = -1;
+      syslog (LOG_ERR, _("NIS+: cache file is corrupt!"));
+      return FALSE;
+    }
+
+  memset (&sin, '\0', sizeof (sin));
+  sin.sin_family = AF_INET;
+  clnt_sock = RPC_ANYSOCK;
+  sin.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
+  sin.sin_port = htons (hptr.tcp_port);
+  cache_clnt = clnttcp_create (&sin, CACHEPROG, CACHE_VER_1, &clnt_sock, 0, 0);
+  if (cache_clnt == NULL)
+    {
+      close (cache_fd);
+      cache_fd = -1;
+      return FALSE;
+    }
+  /* If the program exists, close the socket */
+  if (fcntl (clnt_sock, F_SETFD, FD_CLOEXEC) == -1)
+    perror (_("fcntl: F_SETFD"));
+  return TRUE;
+}
+
+/* Ask the cache manager to update directory 'name'
+   for us (because the ttl has expired). */
+static nis_error
+__cache_refresh (nis_name name)
+{
+  char clnt_res = 0;
+  nis_error result = NIS_SUCCESS;
+
+  __libc_lock_lock (mgrlock);
+
+  if (cache_clnt == NULL)
+    result = NIS_FAIL;
+  else if (clnt_call (cache_clnt, NIS_CACHE_REFRESH_ENTRY,
+		      (xdrproc_t) xdr_wrapstring, (caddr_t) name,
+		      (xdrproc_t) xdr_void, &clnt_res, TIMEOUT)
+	   != RPC_SUCCESS)
+    {
+      __cache_close ();
+      result = NIS_FAIL;
+    }
+
+  __libc_lock_unlock (mgrlock);
+
+  return result;
+}
+
+static nis_error
+__cache_find (const_nis_name name, directory_obj **obj)
+{
+  unsigned long hash;
+  struct cache_header *hptr;
+  struct cache_spacer *cs;
+  struct directory_obj *dir;
+  XDR xdrs;
+  caddr_t addr, ptr;
+  time_t now = time (NULL);
+
+  if (maddr == NULL)
+    return NIS_FAIL;
+
+  hash = __nis_hash (name, strlen(name));
+  hptr = (cache_header *)maddr;
+  if ((hptr->magic != HEADER_MAGIC) || (hptr->vers != CACHE_VERSION))
+    {
+      syslog (LOG_ERR, _("NIS+: cache file is corrupt!"));
+      return NIS_SYSTEMERROR;
+    }
+  cs = (cache_spacer *)(maddr + sizeof (cache_header));
+  while (cs->next_offset)
+    {
+      if (cs->magic != SPACER_MAGIC)
+	{
+	  syslog (LOG_ERR, _("NIS+: cache file is corrupt!"));
+	  return NIS_SYSTEMERROR;
+	}
+      if (cs->hashval == hash)
+	{
+	  if ((now - cs->ctime) > cs->ttl)
+	    return NIS_CACHEEXPIRED;
+	  dir = calloc (1, sizeof (directory_obj));
+	  addr = (caddr_t)cs + sizeof (cache_spacer);
+	  xdrmem_create (&xdrs, addr, cs->next_offset, XDR_DECODE);
+	  xdr_directory_obj (&xdrs, dir);
+	  xdr_destroy (&xdrs);
+	  *obj = dir;
+	  return NIS_SUCCESS;
+	}
+      ptr = (caddr_t)cs;
+      ptr += cs->next_offset + sizeof (struct cache_spacer);
+      cs = (struct cache_spacer *)ptr;
+    }
+  return NIS_NOTFOUND;
+}
+
+static directory_obj *
+internal_cache_search (const_nis_name name)
+{
+  directory_obj *dir;
+  nis_error res;
+  int second_refresh = 0;
+  struct stat s;
+
+  if (cache_fd == -1)
+    if (__cache_open () == FALSE)
+      return NULL;
+
+ again:
+  /* This lock is for nis_cachemgr, so it couldn't write a new cache
+     file if we reading it */
+  if (__nis_lock_cache () == -1)
+    return NULL;
+
+  if (maddr != NULL)
+    munmap (maddr, msize);
+  if (fstat (cache_fd, &s) < 0)
+    maddr = MAP_FAILED;
+  else
+    {
+      msize = s.st_size;
+      maddr = mmap (0, msize, PROT_READ, MAP_SHARED, cache_fd, 0);
+    }
+  if (maddr == MAP_FAILED)
+    {
+      __nis_unlock_cache ();
+      return NULL;
+    }
+
+  res = __cache_find (name, &dir);
+
+  munmap (maddr, msize);
+  maddr = NULL;
+  /* Allow nis_cachemgr to write a new cachefile */
+  __nis_unlock_cache ();
+
+  switch(res)
+    {
+    case NIS_CACHEEXPIRED:
+      if (second_refresh)
+	{
+	  __cache_close ();
+	  syslog (LOG_WARNING,
+		  _("NIS+: nis_cachemgr failed to refresh object for us"));
+	  return NULL;
+	}
+      ++second_refresh;
+      if (__cache_refresh ((char *) name) != NIS_SUCCESS)
+	return NULL;
+      goto again;
+      break;
+    case NIS_SUCCESS:
+      return dir;
+    default:
+      return NULL;
+    }
+}
+
 directory_obj *
 __cache_search (const_nis_name name)
 {
-  return NULL;
+  directory_obj *dir;
+
+  __libc_lock_lock (mgrlock);
+
+  dir = internal_cache_search (name);
+
+  __libc_lock_unlock (mgrlock);
+
+  return dir;
 }
 
-nis_error 
+nis_error
 __cache_add (fd_result *fd)
 {
-  return NIS_FAIL;
+  char clnt_res = 0;
+  nis_error result = NIS_SUCCESS;
+
+  __libc_lock_lock (mgrlock);
+
+  if (cache_clnt == NULL)
+    if (__cache_open () == FALSE)
+      result = NIS_FAIL;
+
+  if (cache_clnt != NULL &&
+      (clnt_call (cache_clnt, NIS_CACHE_ADD_ENTRY, (xdrproc_t) xdr_fd_result,
+		  (caddr_t)fd, (xdrproc_t) xdr_void, &clnt_res, TIMEOUT)
+       != RPC_SUCCESS))
+    {
+      __cache_close ();
+      result = NIS_RPCERROR;
+    }
+
+  __libc_lock_unlock (mgrlock);
+
+  return result;
 }