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-rw-r--r--sysdeps/mach/hurd/bits/fcntl.h5
-rw-r--r--sysdeps/mach/hurd/fcntl.c12
2 files changed, 14 insertions, 3 deletions
diff --git a/sysdeps/mach/hurd/bits/fcntl.h b/sysdeps/mach/hurd/bits/fcntl.h
index 34e6baa049..8ed786d256 100644
--- a/sysdeps/mach/hurd/bits/fcntl.h
+++ b/sysdeps/mach/hurd/bits/fcntl.h
@@ -163,6 +163,11 @@
 #define	F_SETLK		8	/* Set record locking info (non-blocking).  */
 #define	F_SETLKW	9	/* Set record locking info (blocking).  */
 
+#ifdef __USE_GNU
+# define F_DUPFD_CLOEXEC 1030	/* Duplicate, set FD_CLOEXEC on new one.  */
+#endif
+
+
 /* File descriptor flags used with F_GETFD and F_SETFD.  */
 #define	FD_CLOEXEC	1	/* Close on exec.  */
 
diff --git a/sysdeps/mach/hurd/fcntl.c b/sysdeps/mach/hurd/fcntl.c
index d4e4aa5da1..470614b360 100644
--- a/sysdeps/mach/hurd/fcntl.c
+++ b/sysdeps/mach/hurd/fcntl.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992-1997,1999,2000,2002 Free Software Foundation, Inc.
+/* Copyright (C) 1992-1997,1999,2000,2002,2007 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
@@ -50,6 +50,7 @@ __libc_fcntl (int fd, int cmd, ...)
       /* First the descriptor-based commands, which do no RPCs.  */
 
     case F_DUPFD:		/* Duplicate the file descriptor.  */
+    case F_DUPFD_CLOEXEC:
       {
 	struct hurd_fd *new;
 	io_t port, ctty;
@@ -64,6 +65,12 @@ __libc_fcntl (int fd, int cmd, ...)
 	ctty = _hurd_port_get (&d->ctty, &ctty_ulink);
 	port = _hurd_port_locked_get (&d->port, &ulink); /* Unlocks D.  */
 
+	if (cmd == F_DUPFD_CLOEXEC)
+	  flags |= FD_CLOEXEC;
+	else
+	  /* Duplication clears the FD_CLOEXEC flag.  */
+	  flags &= ~FD_CLOEXEC;
+
 	/* Get a new file descriptor.  The third argument to __fcntl is the
 	   minimum file descriptor number for it.  */
 	new = _hurd_alloc_fd (&result, va_arg (ap, int));
@@ -82,8 +89,7 @@ __libc_fcntl (int fd, int cmd, ...)
 	    /* Install the ports and flags in the new descriptor.  */
 	    if (ctty != MACH_PORT_NULL)
 	      _hurd_port_set (&new->ctty, ctty);
-	    /* Duplication clears the FD_CLOEXEC flag.  */
-	    new->flags = flags & ~FD_CLOEXEC;
+	    new->flags = flags;
 	    _hurd_port_locked_set (&new->port, port); /* Unlocks NEW.  */
 	  }