El 03/12/14 a las 07:32, Jim Meyering escribió:
> On Wed, Dec 3, 2014 at 7:05 AM, <santi...@debian.org> wrote:
> > I'm forwarding a bug report filed in debian. Is this the expected
> > behavior?
> >
> > /tmp/greptest % dpkg -l | grep -r grep
> > wtf:hello grep
> > /tmp/greptest % dpkg -l | grep grep
> > ii grep 2.21-1
> > amd64 GNU grep, egrep and fgrep
> >
> > grep -r takes the current dir as input instead of stdin.
>
> Hi Santiago,
>
> That is the expected/documented behavior.
> It was changed upstream 2.5 years ago (as seen in the NEWS file):
>
> * Noteworthy changes in release 2.11 (2012-03-02) [stable]
>
> ** Bug fixes
> ...
> ** New features
>
> If no file operand is given, and a command-line -r or equivalent
> option is given, grep now searches the working directory. Formerly
> grep ignored the -r and searched standard input nonrecursively.
> An -r found in GREP_OPTIONS does not have this new effect.
> --------------------
>
> Note that GREP_OPTIONS has recently been deprecated,
> so this functionality will disappear.
Jim, thanks for clarifying this.
Please, find attached a simple patch to document this in the man page
and info doc.
Regards,
Santiago
diff --git a/doc/grep.in.1 b/doc/grep.in.1
index b6362ee..e8334cb 100644
--- a/doc/grep.in.1
+++ b/doc/grep.in.1
@@ -470,6 +470,7 @@ following symbolic links only if they are on the command line.
This is equivalent to the
.B "\-d recurse"
option.
+Note that if no file operand is given, grep searches the working directory.
.TP
.BR \-R ", " \-\^\-dereference\-recursive
Read all files under each directory, recursively.
diff --git a/doc/grep.texi b/doc/grep.texi
index da9a1be..b495cf7 100644
--- a/doc/grep.texi
+++ b/doc/grep.texi
@@ -699,6 +699,7 @@ read and process all files in that directory, recursively.
Follow symbolic links on the command line, but skip symlinks
that are encountered recursively.
This is the same as the @samp{--directories=recurse} option.
+Note that if no file operand is given, grep searches the working directory.
@item -R
@itemx --dereference-recursive
