From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sat, 20 Nov 2004 08:56:05 +0000 (+0000)
Subject: (dd invocation): Add noctty flag to dd.
X-Git-Tag: v5.3.0~357
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2852d59d222e1f9b5ba80d386d2f5614217484f4;p=thirdparty%2Fcoreutils.git

(dd invocation): Add noctty flag to dd.
---

diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 0b1a69bffa..85c4188e87 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -6832,12 +6832,20 @@ Use non-blocking I/O.
 @cindex symbolic links, following
 Do not follow symbolic links.
 
+@item noctty
+@opindex noctty
+@cindex controlling terminal
+Do not assign the file to be a controlling terminal for @command{dd}.
+This has no effect when the file is not a terminal.
+On many hosts (e.g., @acronym{GNU}/Linux hosts), this option has no effect
+at all.
+
 @end table
 
 These flags are not supported on all systems, and @samp{dd} rejects
 attempts to use them when they are not supported.  When reading from
-standard input or writing to standard output, the @samp{nofollow} flag
-should not be specified, and the other flags
+standard input or writing to standard output, the @samp{nofollow} and
+@samp{noctty} flags should not be specified, and the other flags
 (e.g., @samp{nonblock}) can affect how other processes behave with the
 affected file descriptors, even after @command{dd} exits.