perl -i is very dangerous !

perl -i is very dangerous !

[Marc Chantreux]

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From: Marc Chantreux <chantreux.marc@wanadoo.fr>
To: cygwin-help@cygwin.com
Subject: perl -i is very dangerous !
Date: Fri, 03 May 2002 18:09:51 +0200
Message-ID: <3CD2B64F.5090005@wanadoo.fr>

mc@MILLENIUM:~/test/perldestroy# cat test.txt
this is
a test
for cygwin
mc@MILLENIUM:~/test/perldestroy# perl -i -ne 's/this/works/' test.txt
Can't do inplace edit on test.txt: Permission denied.
mc@MILLENIUM:~/test/perldestroy# ls


any idea ?

Regards,
Marc



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Re: perl -i is very dangerous !

[Peter J. Acklam]

"Gerrit P. Haase" <freeweb@nyckelpiga.de> wrote:

> Marc schrieb:
> 
> > mc@MILLENIUM:~/test/perldestroy# cat test.txt
> > this is
> > a test
> > for cygwin
> > mc@MILLENIUM:~/test/perldestroy# perl -i -ne 's/this/works/' test.txt
> > Can't do inplace edit on test.txt: Permission denied.
> > mc@MILLENIUM:~/test/perldestroy# ls
> > any idea ?
> 
> It is gone.
> 
> Use perl -i.bak instead.

Not to mention to use -p and *not* -n.  The -n option will not
write back to the file, so it will end up having size zero.

Peter

-- 
Where do bit streams end?  In bit rivers?


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Re: perl -i is very dangerous !

[Gerrit P. Haase]

David schrieb:

>  I posted a (backward!) patch for this behavior on Aug 9, 2001
> http://sources.redhat.com/ml/cygwin/2001-08/msg00491.html

>  I also sent it to the perl maintainers, although I may not
> sent it to the cygwin perl maintainer. Apparently it never
> made it into the released package.

I will include it in the next release which is perl-5.8 then.


Gerrit
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Re: perl -i is very dangerous !

[Gerrit P. Haase]

Marc schrieb:

> mc@MILLENIUM:~/test/perldestroy# cat test.txt
> this is
> a test
> for cygwin
> mc@MILLENIUM:~/test/perldestroy# perl -i -ne 's/this/works/' test.txt
> Can't do inplace edit on test.txt: Permission denied.
> mc@MILLENIUM:~/test/perldestroy# ls


> any idea ?

It is gone.

Use perl -i.bak instead.

Gerrit
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RE: perl -i is very dangerous !

[Robinow, David]

> -----Original Message-----
> From: Marc Chantreux [mailto:chantreux.marc@wanadoo.fr]
> Sent: Friday, May 03, 2002 12:10 PM
> To: cygwin-help@cygwin.com
> Subject: perl -i is very dangerous !
> 
> 
> mc@MILLENIUM:~/test/perldestroy# cat test.txt
> this is
> a test
> for cygwin
> mc@MILLENIUM:~/test/perldestroy# perl -i -ne 's/this/works/' test.txt
> Can't do inplace edit on test.txt: Permission denied.
> mc@MILLENIUM:~/test/perldestroy# ls

 I posted a (backward!) patch for this behavior on Aug 9, 2001
http://sources.redhat.com/ml/cygwin/2001-08/msg00491.html

 I also sent it to the perl maintainers, although I may not
sent it to the cygwin perl maintainer. Apparently it never
made it into the released package.

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