1 files changed, 124 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/fork.c b/nptl/sysdeps/unix/sysv/linux/fork.c
new file mode 100644
index 0000000000..c1aa23c5c5
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/fork.c
@@ -0,0 +1,124 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sysdep.h>
+#include <libio/libioP.h>
+#include <tls.h>
+#include "fork.h"
+
+
+unsigned long int *__fork_generation_pointer;
+
+
+lll_lock_t __fork_lock = LLL_LOCK_INITIALIZER;
+LIST_HEAD (__fork_prepare_list);
+LIST_HEAD (__fork_parent_list);
+LIST_HEAD (__fork_child_list);
+
+
+static void
+fresetlockfiles (void)
+{
+  _IO_ITER i;
+
+  for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i))
+    *((pthread_mutex_t *) _IO_iter_file(i)->_lock)
+      = (pthread_mutex_t) PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+}
+
+
+pid_t
+__libc_fork (void)
+{
+  pid_t pid;
+  list_t *runp;
+
+  /* Get the lock so that the set of registered handlers is not
+     inconsistent or changes beneath us.  */
+  lll_lock (__fork_lock);
+
+  /* Run all the registered preparation handlers.  In reverse order.  */
+  list_for_each_prev (runp, &__fork_prepare_list)
+    {
+      struct fork_handler *curp;
+
+      curp = list_entry (runp, struct fork_handler, list);
+
+      curp->handler ();
+    }
+
+  _IO_list_lock ();
+
+#ifdef ARCH_FORK
+  pid = ARCH_FORK ();
+#else
+# error "ARCH_FORK must be defined so that the CLONE_SETTID flag is used"
+  pid = INLINE_SYSCALL (fork, 0);
+#endif
+
+  if (pid == 0)
+    {
+      if (__fork_generation_pointer != NULL)
+	*__fork_generation_pointer += 4;
+
+      /* Reset the file list.  These are recursive mutexes.  */
+      fresetlockfiles ();
+
+      /* We execute this even if the 'fork' call failed.  */
+      _IO_list_resetlock ();
+
+      /* Run the handlers registered for the child.  */
+      list_for_each (runp, &__fork_child_list)
+	{
+	  struct fork_handler *curp;
+
+	  curp = list_entry (runp, struct fork_handler, list);
+
+	  curp->handler ();
+	}
+
+      /* Initialize the fork lock.  */
+      __fork_lock = (lll_lock_t) LLL_LOCK_INITIALIZER;
+    }
+  else
+    {
+      /* We execute this even if the 'fork' call failed.  */
+      _IO_list_unlock ();
+
+      /* Run the handlers registered for the parent.  */
+      list_for_each (runp, &__fork_parent_list)
+	{
+	  struct fork_handler *curp;
+
+	  curp = list_entry (runp, struct fork_handler, list);
+
+	  curp->handler ();
+	}
+
+      /* Release the for lock.  */
+      lll_unlock (__fork_lock);
+    }
+
+  return pid;
+}
+weak_alias (__libc_fork, __fork)
+weak_alias (__libc_fork, fork)