RE: What does ls do?

RE: What does ls do?

[Halim, Salman]

i agree; while i haven't had a virus scanner trigger, i do occasionally get
'unable to access file' (or some such) messages with already open files
whenever i try an 'lf -F'.  i didn't think it a problem because it makes
sense that it would be done this way on windows :)

salman.

-----Original Message-----
From: Randall R Schulz
To: Earnie Boyd; Jens Yllman; GNUWin32
Sent: 7/24/00 2:21 PM
Subject: Re: What does ls do?

Jens, Earnie,

One can also infer some of ls's or the Cygwin DLL's "stat" activities
from 
their behavior.

I've observed that files that begin with "#!" will get tagged with an 
execute bit. Obviously the implication is that the file's contents are 
examined when the file is "stat"-ed, since the executability of #!
scripts 
is not a Windows feature, but rather one that is emulated by the Cygwin
DLL.

Thus an "ls -l" or "ls -F" or "ls -t" or any ls option that requires
that 
files be "stat"-ed will be slow when applied to directories with lots of

files. Likewise, virus scanners are also going to be triggered by a
"stat" 
call. This will slow things down further...

Randall Schulz
Teknolwedge Corp.
Palo Alto, CA USA


At 10:08 AM 07/24/2000 , Earnie Boyd wrote:
>--- Jens Yllman <jens@uniweb.se> wrote:
> >  What does ls realy do? The reason I wonder is because I just
noticed that
> > my virus program gets triggered for every file that is in the
directory
> > that where I use ls. And all the file with the right(wrong)
extension
> > get search by the virusprogram. And this makes ls very slow.
> >
>
>The best answer to your question about ls is "Use the source, Luke".
Your
>virus program must be triggered by a file being opened or even stat'ed.
If
>this is the case then all programs not just Cygwin ones will be
affected.  The
>only cure that I've found is to disable the dynamic virus protection
and
>periodically check your files for viruses.
>
>Cheers,
>
>   Earnie Boyd: < mailto:earnie_boyd@yahoo.com >


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Re: What does ls do?

[Jens Yllman]

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 Ok, thank you. I thougt this was the reason. I try to turn of the 'scan
on open' option. But keep the 'scan on write'. And hope it will work
better.

 Jens Yllman

Earnie Boyd wrote:
> 
> --- Jens Yllman <jens@uniweb.se> wrote:
> >  What do ls realy do? The reason I wonder is because I just noticed that
> > my virus program gets triggered for every file that is in the directory
> > that where I use ls. And all the file with the right(wrong) extension
> > get search by the virusprogram. And this makes ls very slow.
> >
> 
> The best answer to your question about ls is "Use the source, Luke".  Your
> virus program must be triggered by a file being opened or even stat'ed.  If
> this is the case then all programs not just Cygwin ones will be affected.  The
> only cure that I've found is to disable the dynamic virus protection and
> periodically check your files for viruses.
> 
> Cheers,
> 
> =====
> ---
>    Earnie Boyd: < mailto:earnie_boyd@yahoo.com >
>             __Cygwin: POSIX on Windows__
> Cygwin Newbies: < http://gw32.freeyellow.com/ >
>            __Minimalist GNU for Windows__
>   Mingw32 List: < http://www.egroups.com/group/mingw32/ >
>     Mingw Home: < http://www.mingw.org/ >
> 
> __________________________________________________
> Do You Yahoo!?
> Get Yahoo! Mail – Free email you can access from anywhere!
> http://mail.yahoo.com/

-- 
------------------------------------------------------------
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P O Box 745                          FAX:    +46 8 626 42 01
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SWEDEN                               http://www.uniweb.se/

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Re: What does ls do?

[Randall R Schulz]

Jens, Earnie,

One can also infer some of ls's or the Cygwin DLL's "stat" activities from 
their behavior.

I've observed that files that begin with "#!" will get tagged with an 
execute bit. Obviously the implication is that the file's contents are 
examined when the file is "stat"-ed, since the executability of #! scripts 
is not a Windows feature, but rather one that is emulated by the Cygwin DLL.

Thus an "ls -l" or "ls -F" or "ls -t" or any ls option that requires that 
files be "stat"-ed will be slow when applied to directories with lots of 
files. Likewise, virus scanners are also going to be triggered by a "stat" 
call. This will slow things down further...

Randall Schulz
Teknolwedge Corp.
Palo Alto, CA USA


At 10:08 AM 07/24/2000 , Earnie Boyd wrote:
>--- Jens Yllman <jens@uniweb.se> wrote:
> >  What does ls realy do? The reason I wonder is because I just noticed that
> > my virus program gets triggered for every file that is in the directory
> > that where I use ls. And all the file with the right(wrong) extension
> > get search by the virusprogram. And this makes ls very slow.
> >
>
>The best answer to your question about ls is "Use the source, Luke".  Your
>virus program must be triggered by a file being opened or even stat'ed.  If
>this is the case then all programs not just Cygwin ones will be affected.  The
>only cure that I've found is to disable the dynamic virus protection and
>periodically check your files for viruses.
>
>Cheers,
>
>   Earnie Boyd: < mailto:earnie_boyd@yahoo.com >


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Re: What does ls do?

[Earnie Boyd]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 1225 bytes --]

--- Jens Yllman <jens@uniweb.se> wrote:
>  What do ls realy do? The reason I wonder is because I just noticed that
> my virus program gets triggered for every file that is in the directory
> that where I use ls. And all the file with the right(wrong) extension
> get search by the virusprogram. And this makes ls very slow.
> 

The best answer to your question about ls is "Use the source, Luke".  Your
virus program must be triggered by a file being opened or even stat'ed.  If
this is the case then all programs not just Cygwin ones will be affected.  The
only cure that I've found is to disable the dynamic virus protection and
periodically check your files for viruses.

Cheers,

=====
---
   Earnie Boyd: < mailto:earnie_boyd@yahoo.com >
            __Cygwin: POSIX on Windows__
Cygwin Newbies: < http://gw32.freeyellow.com/ >
           __Minimalist GNU for Windows__
  Mingw32 List: < http://www.egroups.com/group/mingw32/ >
    Mingw Home: < http://www.mingw.org/ >

__________________________________________________
Do You Yahoo!?
Get Yahoo! Mail – Free email you can access from anywhere!
http://mail.yahoo.com/

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What does ls do?

[Jens Yllman]

 What do ls realy do? The reason I wonder is because I just noticed that
my virus program gets triggered for every file that is in the directory
that where I use ls. And all the file with the right(wrong) extension
get search by the virusprogram. And this makes ls very slow.

 Jens Yllman
------------------------------------------------------------
Uniweb AB                            Phone:  +46 8 626 42 00
P O Box 745                          FAX:    +46 8 626 42 01
S-191 27  SOLLENTUNA
SWEDEN                               http://www.uniweb.se/

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