1 files changed, 67 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/close_range.c b/sysdeps/mach/hurd/close_range.c
new file mode 100644
index 0000000000..d6a2eab086
--- /dev/null
+++ b/sysdeps/mach/hurd/close_range.c
@@ -0,0 +1,67 @@
+/* Copyright (C) 2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <unistd.h>
+#include <hurd.h>
+#include <hurd/fd.h>
+
+/* Close the file descriptors from FIRST up to LAST, inclusive.
+   If CLOSE_RANGE_CLOEXEC is set in FLAGS, set the FD_CLOEXEC flag
+   instead of closing.  */
+int
+__close_range (unsigned int first, unsigned int last,
+               int flags)
+{
+  int i;
+
+  if (first > last)
+    return __hurd_fail (EINVAL);
+  if (flags & ~CLOSE_RANGE_CLOEXEC)
+    return __hurd_fail (EINVAL);
+
+  HURD_CRITICAL_BEGIN;
+  __mutex_lock (&_hurd_dtable_lock);
+
+  for (i = first; i <= last && i < _hurd_dtablesize; i++)
+    {
+      struct hurd_fd *fd = _hurd_dtable[i];
+
+      if (fd == NULL || fd->port.port == MACH_PORT_NULL)
+        continue;
+
+      __spin_lock (&fd->port.lock);
+
+      if (flags & CLOSE_RANGE_CLOEXEC)
+        fd->flags |= FD_CLOEXEC;
+      else
+        {
+          _hurd_port_set (&fd->ctty, MACH_PORT_NULL);
+          _hurd_port_locked_set (&fd->port, MACH_PORT_NULL);
+        }
+
+      __spin_unlock (&fd->port.lock);
+    }
+
+  __mutex_unlock (&_hurd_dtable_lock);
+  HURD_CRITICAL_END;
+
+  return 0;
+}
+
+libc_hidden_def (__close_range)
+strong_alias (__close_range, __libc_close_range)
+weak_alias (__close_range, close_range)