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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Wed, 29 Aug 2012 16:43:58 +0000 (UTC)
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Subject: svn commit: r239862 - stable/8/lib/libc/sys
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Author: kib
Date: Wed Aug 29 16:43:57 2012
New Revision: 239862
URL: http://svn.freebsd.org/changeset/base/239862

Log:
  MFC r238615:
  Document F_DUPFD_CLOEXEC.

Modified:
  stable/8/lib/libc/sys/fcntl.2
Directory Properties:
  stable/8/lib/libc/   (props changed)

Modified: stable/8/lib/libc/sys/fcntl.2
==============================================================================
--- stable/8/lib/libc/sys/fcntl.2	Wed Aug 29 16:42:26 2012	(r239861)
+++ stable/8/lib/libc/sys/fcntl.2	Wed Aug 29 16:43:57 2012	(r239862)
@@ -28,7 +28,7 @@
 .\"     @(#)fcntl.2	8.2 (Berkeley) 1/12/94
 .\" $FreeBSD$
 .\"
-.Dd September 28, 2009
+.Dd July 18, 2012
 .Dt FCNTL 2
 .Os
 .Sh NAME
@@ -54,7 +54,7 @@ Depending on the value of
 .Fn fcntl
 can take an additional third argument
 .Fa "int arg" .
-.Bl -tag -width F_GETOWNX
+.Bl -tag -width F_DUPFD_CLOEXEC
 .It Dv F_DUPFD
 Return a new descriptor as follows:
 .Pp
@@ -73,11 +73,22 @@ Same access mode (read, write or read/wr
 Same file status flags (i.e., both file descriptors
 share the same file status flags).
 .It
-The close-on-exec flag associated with the new file descriptor
-is set to remain open across
+The close-on-exec flag
+.Dv FD_CLOEXEC
+associated with the new file descriptor is cleared, so the file descriptor is
+to remain open across
 .Xr execve 2
 system calls.
 .El
+.It Dv F_DUPFD_CLOEXEC
+Like
+.Dv F_DUPFD ,
+but the
+.Dv FD_CLOEXEC
+flag associated with the new file descriptor is set, so the file descriptor
+is closed when
+.Xr execve 2
+system call executes.
 .It Dv F_DUP2FD
 It is functionally equivalent to
 .Bd -literal -offset indent