* cygwin.din (dup3): Export.

	(pipe2): Export.
	* dtable.cc (dtable::dup_worker): Take additional flags parameter.
	Handle O_CLOEXEC flag.
	(dtable::dup3): Rename from dup2.  Take additional flags parameter.
	Check for valid flags.  Drop check for newfd == oldfd.
	* dtable.h (dtable::dup_worker): Add flags parameter.
	(dtable::dup3): Rename from dup2.
	* fcntl.cc (fcntl64): Add F_DUPFD_CLOEXEC case.
	* fhandler.h (fhandler_mailslot::get_object_attr): Add flags parameter.
	* fhandler.cc (fhandler_base::open): Use security attribute with
	inheritance according to setting of O_CLOEXEC flag.
	* fhandler_console.cc (fhandler_console::open): Ditto.
	* fhandler_fifo.cc (sec_user_cloexec): New inline function to
	create security attribute with inheritance according to setting of
	O_CLOEXEC flag.
	(fhandler_fifo::open): Call sec_user_cloexec to fetch security
	attribute.
	(fhandler_fifo::wait): Ditto.
	* fhandler_mem.cc (fhandler_dev_mem::open): Ditto.
	* fhandler_mailslot.cc (fhandler_mailslot::get_object_attr): Take
	additional flags parameter.  Use security attribute with inheritance
	according to setting of O_CLOEXEC flag.
	(fhandler_mailslot::open): Call get_object_attr with flags parameter.
	* fhandler_registry.cc (fhandler_registry::open): Call set_close_on_exec
	on real handles to accommodate O_CLOEXEC flag.
	* fhandler_tty.cc (fhandler_tty_slave::open): Ditto.
	* fhandler_tape.cc: Create mutex with inheritance according to setting
	of O_CLOEXEC flag.
	* pipe.cc: Replace usage of O_NOINHERIT with O_CLOEXEC.
	 (fhandler_pipe::init): Simplify setting close_on_exec flag.
	(fhandler_pipe::open): Remove setting close_on_exec flag.
	(fhandler_pipe::create): Use security attribute with inheritance
	according to setting of O_CLOEXEC flag.
	(pipe2): New exported function.
	* posix_ipc.cc: Throughout, open backing files with O_CLOEXEC
	flag to follow POSIX semantics.
	* security.h (sec_none_cloexec): New define.
	* syscalls.cc (dup): Add missing extern "C" qualifier.  Accommodate
	renaming of dtable::dup2 to dtable::dup3.
	(dup2): Ditto.  Check newfd == oldfd here.
	(dup3): New function.  Check newfd == oldfd here.
	(open): Set close_on_exec flag according to O_CLOEXEC flag before
	calling fhandler->open.
	* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.

1 files changed, 9 insertions, 7 deletions

diff --git a/winsup/cygwin/fhandler_mailslot.cc b/winsup/cygwin/fhandler_mailslot.cc
index a59a3dcf9..691c6043b 100644
--- a/winsup/cygwin/fhandler_mailslot.cc
+++ b/winsup/cygwin/fhandler_mailslot.cc
@@ -1,7 +1,6 @@
 /* fhandler_mailslot.cc.  See fhandler.h for a description of the fhandler classes.
 
-   Copyright 2005, 2007, 2008, 2009
-   Red Hat, Inc.
+   Copyright 2005, 2007, 2008, 2009, 2010 Red Hat, Inc.
 
    This file is part of Cygwin.
 
@@ -47,12 +46,15 @@ fhandler_mailslot::fstat (struct __stat64 *buf)
 
 POBJECT_ATTRIBUTES
 fhandler_mailslot::get_object_attr (OBJECT_ATTRIBUTES &attr,
-				    PUNICODE_STRING path)
+				    PUNICODE_STRING path,
+				    int flags)
 {
   
   RtlCopyUnicodeString (path, pc.get_nt_native_path ());
   RtlAppendUnicodeStringToString (path, &installation_key);
-  InitializeObjectAttributes (&attr, path, OBJ_CASE_INSENSITIVE | OBJ_INHERIT,
+  InitializeObjectAttributes (&attr, path,
+			      OBJ_CASE_INSENSITIVE
+			      | (flags & O_CLOEXEC ? 0 : OBJ_INHERIT),
 			      NULL, NULL);
   return &attr;
 }
@@ -76,7 +78,7 @@ fhandler_mailslot::open (int flags, mode_t mode)
     case O_RDONLY:	/* Server */
       timeout.QuadPart = (flags & O_NONBLOCK) ? 0LL : 0x8000000000000000LL;
       status = NtCreateMailslotFile (&x, GENERIC_READ | SYNCHRONIZE,
-				     get_object_attr (attr, &path),
+				     get_object_attr (attr, &path, flags),
 				     &io, FILE_SYNCHRONOUS_IO_NONALERT,
 				     0, 0, &timeout);
       if (!NT_SUCCESS (status))
@@ -97,7 +99,7 @@ fhandler_mailslot::open (int flags, mode_t mode)
 	      break;
 	    }
 	  status = NtOpenFile (&x, GENERIC_READ | SYNCHRONIZE,
-			       get_object_attr (attr, &path), &io,
+			       get_object_attr (attr, &path, flags), &io,
 			       FILE_SHARE_VALID_FLAGS,
 			       FILE_SYNCHRONOUS_IO_NONALERT);
 #endif
@@ -122,7 +124,7 @@ fhandler_mailslot::open (int flags, mode_t mode)
 	  break;
 	}
       status = NtOpenFile (&x, GENERIC_WRITE | SYNCHRONIZE,
-			   get_object_attr (attr, &path), &io,
+			   get_object_attr (attr, &path, flags), &io,
 			   FILE_SHARE_VALID_FLAGS,
 			   FILE_SYNCHRONOUS_IO_NONALERT);
       if (!NT_SUCCESS (status))