nss: Implement <nss_database.h>

This code manages the mappings of the available databases in NSS
(i.e. passwd, hosts, netgroup, etc) with the actions that should
be taken to do a query on those databases.

This is the main API between query functions scattered throughout
glibc and the underlying code (actions, modules, etc).

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

2 files changed, 17 insertions, 0 deletions

diff --git a/sysdeps/mach/hurd/fork.c b/sysdeps/mach/hurd/fork.c
index 3767fd9..f296310 100644
--- a/sysdeps/mach/hurd/fork.c
+++ b/sysdeps/mach/hurd/fork.c
@@ -28,6 +28,7 @@
 #include "hurdmalloc.h"		/* XXX */
 #include <tls.h>
 #include <malloc/malloc-internal.h>
+#include <nss/nss_database.h>
 
 #undef __fork
 
@@ -68,6 +69,7 @@ __fork (void)
   size_t i;
   error_t err;
   struct hurd_sigstate *volatile ss;
+  struct nss_database_data nss_database_data;
 
   RUN_HOOK (_hurd_atfork_prepare_hook, ());
 
@@ -109,6 +111,9 @@ __fork (void)
       /* Run things that prepare for forking before we create the task.  */
       RUN_HOOK (_hurd_fork_prepare_hook, ());
 
+      call_function_static_weak (__nss_database_fork_prepare_parent,
+				 &nss_database_data);
+
       /* Lock things that want to be locked before we fork.  */
       {
 	void *const *p;
@@ -666,6 +671,9 @@ __fork (void)
       _hurd_malloc_fork_child ();
       call_function_static_weak (__malloc_fork_unlock_child);
 
+      call_function_static_weak (__nss_database_fork_subprocess,
+				 &nss_database_data);
+
       /* Run things that want to run in the child task to set up.  */
       RUN_HOOK (_hurd_fork_child_hook, ());
 
diff --git a/sysdeps/nptl/fork.c b/sysdeps/nptl/fork.c
index 5091a00..964eb1e 100644
--- a/sysdeps/nptl/fork.c
+++ b/sysdeps/nptl/fork.c
@@ -32,6 +32,7 @@
 #include <arch-fork.h>
 #include <futex-internal.h>
 #include <malloc/malloc-internal.h>
+#include <nss/nss_database.h>
 
 static void
 fresetlockfiles (void)
@@ -57,6 +58,8 @@ __libc_fork (void)
 
   __run_fork_handlers (atfork_run_prepare, multiple_threads);
 
+  struct nss_database_data nss_database_data;
+
   /* If we are not running multiple threads, we do not have to
      preserve lock state.  If fork runs from a signal handler, only
      async-signal-safe functions can be used in the child.  These data
@@ -64,6 +67,9 @@ __libc_fork (void)
      not matter if fork was called from a signal handler.  */
   if (multiple_threads)
     {
+      call_function_static_weak (__nss_database_fork_prepare_parent,
+				 &nss_database_data);
+
       _IO_list_lock ();
 
       /* Acquire malloc locks.  This needs to come last because fork
@@ -118,6 +124,9 @@ __libc_fork (void)
 
 	  /* Reset locks in the I/O code.  */
 	  _IO_list_resetlock ();
+
+	  call_function_static_weak (__nss_database_fork_subprocess,
+				     &nss_database_data);
 	}
 
       /* Reset the lock the dynamic loader uses to protect its data.  */