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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 19 Jul 2012 10:23:59 +0000 (UTC)
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Subject: svn commit: r238615 - head/lib/libc/sys
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Author: kib
Date: Thu Jul 19 10:23:59 2012
New Revision: 238615
URL: http://svn.freebsd.org/changeset/base/238615

Log:
  Document F_DUPFD_CLOEXEC. Also provide some wording changes for
  F_DUPFD to make it less confusing, at least for me.
  
  MFC after:	1 week

Modified:
  head/lib/libc/sys/fcntl.2

Modified: head/lib/libc/sys/fcntl.2
==============================================================================
--- head/lib/libc/sys/fcntl.2	Thu Jul 19 10:22:54 2012	(r238614)
+++ head/lib/libc/sys/fcntl.2	Thu Jul 19 10:23:59 2012	(r238615)
@@ -28,7 +28,7 @@
 .\"     @(#)fcntl.2	8.2 (Berkeley) 1/12/94
 .\" $FreeBSD$
 .\"
-.Dd January 28, 2012
+.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