svn commit: r238615 - head/lib/libc/sys
Konstantin Belousov
kib at FreeBSD.org
Thu Jul 19 10:23:59 UTC 2012
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
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