Problem with grep in Emacs 23.2

Problem with grep in Emacs 23.2

[Shenli Zhu]

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Hi,

In Emacs 23.1, to grep,
(1) M-x grep,
(2) change grep-command "grep -i -nH -e \"re\" -r \"/home/username/\"
--include=\"*.*\"" to what I want.
All works well.

But in Emacs 23.2, after step(1), Emacs will fork a grep subprocess which
take all CPU resource and I have to kill it.

I trace the code, there is a function grep-compute-defaults, seems to check
the system info and set some initial values. It will call grep-probe to run
some small test(grep English in the file Hello in Emacs).

But my grep-command cause Emacs/grep-probe into a non responsive state.

I don't want to change grep-command, how can I skip grep-probe?

Thanks,
Davy

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Re: Problem with grep in Emacs 23.2

[Peter Dyballa]

Am 06.09.2010 um 13:32 schrieb Shenli Zhu:

> (2) change grep-command "grep -i -nH -e \"re\" -r \"/home/username/\"
> --include=\"*.*\"" to what I want.


Does this work from the command line? (I'd use ' instead of \" to  
prevent the shell from expanding the meta-characters ``*´´ or ``.´´,  
which could cause the failure you observe.)

--
Greetings

   Pete

Spam will be a thing of the past in two years' time.
				– Bill Gates, Jan 2004

Re: Problem with grep in Emacs 23.2

[Shenli Zhu]

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Hi Peter,

Do you mean the grep-command I set should be runnable in shell? I just use
grep-command to store the grep template, so it cannot be run in shell.

Why we need probe-grep? To test whether grep exists and whether its function
works correctly? Can I skip it?

Thanks


On Tue, Sep 7, 2010 at 4:04 AM, Peter Dyballa <Peter_Dyballa@web.de> wrote:

>
> Am 06.09.2010 um 13:32 schrieb Shenli Zhu:
>
>
>  (2) change grep-command "grep -i -nH -e \"re\" -r \"/home/username/\"
>> --include=\"*.*\"" to what I want.
>>
>
>
> Does this work from the command line? (I'd use ' instead of \" to prevent
> the shell from expanding the meta-characters ``*´´ or ``.´´, which could
> cause the failure you observe.)
>
> --
> Greetings
>
>  Pete
>
> Spam will be a thing of the past in two years' time.
>                                – Bill Gates, Jan 2004
>
>

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Re: Problem with grep in Emacs 23.2

[Lennart Borgman]

On Tue, Sep 7, 2010 at 2:22 AM, Shenli Zhu <zhushenli2@gmail.com> wrote:
> Hi Peter,
>
> Do you mean the grep-command I set should be runnable in shell? I just use
> grep-command to store the grep template, so it cannot be run in shell.
>
> Why we need probe-grep? To test whether grep exists and whether its function
> works correctly? Can I skip it?


probe-grep tries to find out what grep program you actually use and
what it can do. So, yes, you can skip it if you know what the program
can do.

Re: Problem with grep in Emacs 23.2

[Shenli Zhu]

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Hi, Lennart, how to skip grep-probe/grep-compute-defaults (add hook or
change variable)?

Thanks

On Tue, Sep 7, 2010 at 8:24 AM, Lennart Borgman
<lennart.borgman@gmail.com>wrote:

> On Tue, Sep 7, 2010 at 2:22 AM, Shenli Zhu <zhushenli2@gmail.com> wrote:
> > Hi Peter,
> >
> > Do you mean the grep-command I set should be runnable in shell? I just
> use
> > grep-command to store the grep template, so it cannot be run in shell.
> >
> > Why we need probe-grep? To test whether grep exists and whether its
> function
> > works correctly? Can I skip it?
>
>
> probe-grep tries to find out what grep program you actually use and
> what it can do. So, yes, you can skip it if you know what the program
> can do.
>

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Re: Problem with grep in Emacs 23.2

[Lennart Borgman]

Use customize to set the needed values, for example:

  M-x customize RET grep-use-null-device RET


On Tue, Sep 7, 2010 at 3:05 AM, Shenli Zhu <zhushenli2@gmail.com> wrote:
> Hi, Lennart, how to skip grep-probe/grep-compute-defaults (add hook or
> change variable)?
>
> Thanks
>
> On Tue, Sep 7, 2010 at 8:24 AM, Lennart Borgman <lennart.borgman@gmail.com>
> wrote:
>>
>> On Tue, Sep 7, 2010 at 2:22 AM, Shenli Zhu <zhushenli2@gmail.com> wrote:
>> > Hi Peter,
>> >
>> > Do you mean the grep-command I set should be runnable in shell? I just
>> > use
>> > grep-command to store the grep template, so it cannot be run in shell.
>> >
>> > Why we need probe-grep? To test whether grep exists and whether its
>> > function
>> > works correctly? Can I skip it?
>>
>>
>> probe-grep tries to find out what grep program you actually use and
>> what it can do. So, yes, you can skip it if you know what the program
>> can do.
>
>

Re: Problem with grep in Emacs 23.2

[Shenli Zhu]

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Lennart, thank you,

I set grep-use-null-device to nil, but the problem still happen.

Maybe I shall trace the code to find how to avoid grep-probe. There is no
switch to turn off (grep-compute-defaults) in grep, because different
versions of grep. But I think most of people work on Linux and Gnu grep. So
why not have a switch tell it do not compute defaults?

On Tue, Sep 7, 2010 at 9:24 AM, Lennart Borgman
<lennart.borgman@gmail.com>wrote:

> Use customize to set the needed values, for example:
>
>  M-x customize RET grep-use-null-device RET
>
>
> On Tue, Sep 7, 2010 at 3:05 AM, Shenli Zhu <zhushenli2@gmail.com> wrote:
> > Hi, Lennart, how to skip grep-probe/grep-compute-defaults (add hook or
> > change variable)?
> >
> > Thanks
> >
> > On Tue, Sep 7, 2010 at 8:24 AM, Lennart Borgman <
> lennart.borgman@gmail.com>
> > wrote:
> >>
> >> On Tue, Sep 7, 2010 at 2:22 AM, Shenli Zhu <zhushenli2@gmail.com>
> wrote:
> >> > Hi Peter,
> >> >
> >> > Do you mean the grep-command I set should be runnable in shell? I just
> >> > use
> >> > grep-command to store the grep template, so it cannot be run in shell.
> >> >
> >> > Why we need probe-grep? To test whether grep exists and whether its
> >> > function
> >> > works correctly? Can I skip it?
> >>
> >>
> >> probe-grep tries to find out what grep program you actually use and
> >> what it can do. So, yes, you can skip it if you know what the program
> >> can do.
> >
> >
>

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Re: Problem with grep in Emacs 23.2

[Shenli Zhu]

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Set grep-use-null-device to t, problem solved.

On Tue, Sep 7, 2010 at 9:50 AM, Shenli Zhu <zhushenli2@gmail.com> wrote:

> Lennart, thank you,
>
> I set grep-use-null-device to nil, but the problem still happen.
>
> Maybe I shall trace the code to find how to avoid grep-probe. There is no
> switch to turn off (grep-compute-defaults) in grep, because different
> versions of grep. But I think most of people work on Linux and Gnu grep. So
> why not have a switch tell it do not compute defaults?
>
>
> On Tue, Sep 7, 2010 at 9:24 AM, Lennart Borgman <lennart.borgman@gmail.com
> > wrote:
>
>> Use customize to set the needed values, for example:
>>
>>  M-x customize RET grep-use-null-device RET
>>
>>
>> On Tue, Sep 7, 2010 at 3:05 AM, Shenli Zhu <zhushenli2@gmail.com> wrote:
>> > Hi, Lennart, how to skip grep-probe/grep-compute-defaults (add hook or
>> > change variable)?
>> >
>> > Thanks
>> >
>> > On Tue, Sep 7, 2010 at 8:24 AM, Lennart Borgman <
>> lennart.borgman@gmail.com>
>> > wrote:
>> >>
>> >> On Tue, Sep 7, 2010 at 2:22 AM, Shenli Zhu <zhushenli2@gmail.com>
>> wrote:
>> >> > Hi Peter,
>> >> >
>> >> > Do you mean the grep-command I set should be runnable in shell? I
>> just
>> >> > use
>> >> > grep-command to store the grep template, so it cannot be run in
>> shell.
>> >> >
>> >> > Why we need probe-grep? To test whether grep exists and whether its
>> >> > function
>> >> > works correctly? Can I skip it?
>> >>
>> >>
>> >> probe-grep tries to find out what grep program you actually use and
>> >> what it can do. So, yes, you can skip it if you know what the program
>> >> can do.
>> >
>> >
>>
>
>

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Re: Problem with grep in Emacs 23.2

[David Combs]

In article <mailman.0.1283844542.27325.help-gnu-emacs@gnu.org>,
Shenli Zhu  <zhushenli2@gmail.com> wrote:
>-=-=-=-=-=-
>
>Set grep-use-null-device to t, problem solved.
>
>On Tue, Sep 7, 2010 at 9:50 AM, Shenli Zhu <zhushenli2@gmail.com> wrote:
>
>> Lennart, thank you,
>>
>> I set grep-use-null-device to nil, but the problem still happen.
>>
>> Maybe I shall trace the code to find how to avoid grep-probe. There is no
>> switch to turn off (grep-compute-defaults) in grep, because different
>> versions of grep. But I think most of people work on Linux and Gnu grep. So
>> why not have a switch tell it do not compute defaults?
>>
>>
>> On Tue, Sep 7, 2010 at 9:24 AM, Lennart Borgman <lennart.borgman@gmail.com
>> > wrote:
>>
>>> Use customize to set the needed values, for example:
>>>
>>>  M-x customize RET grep-use-null-device RET
>>>
>>>
>>> On Tue, Sep 7, 2010 at 3:05 AM, Shenli Zhu <zhushenli2@gmail.com> wrote:
>>> > Hi, Lennart, how to skip grep-probe/grep-compute-defaults (add hook or
>>> > change variable)?
>>> >
>>> > Thanks
>>> >
>>> > On Tue, Sep 7, 2010 at 8:24 AM, Lennart Borgman <
>>> lennart.borgman@gmail.com>
>>> > wrote:
>>> >>
>>> >> On Tue, Sep 7, 2010 at 2:22 AM, Shenli Zhu <zhushenli2@gmail.com>
>>> wrote:
>>> >> > Hi Peter,
>>> >> >
>>> >> > Do you mean the grep-command I set should be runnable in shell? I
>>> just
>>> >> > use
>>> >> > grep-command to store the grep template, so it cannot be run in
>>> shell.
>>> >> >
>>> >> > Why we need probe-grep? To test whether grep exists and whether its
>>> >> > function
>>> >> > works correctly? Can I skip it?
>>> >>
>>> >>
>>> >> probe-grep tries to find out what grep program you actually use and
>>> >> what it can do. So, yes, you can skip it if you know what the program
>>> >> can do.
>>> >
>>> >
>>>
>>
>>
>
>-=-=-=-=-=-
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>-=-=-=-=-=-

Hi -- I just came across this thread.  This M-x grep problem is 
a bug that you guys have now fixed in the sources, etc?

Or is this something that, when I start using it, each of will
have to do that fix ourselves?

Or what.  Am just a little confused.

THANKS!

David