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Message-ID: <1052752066.3ebfb8c2a9667@webmail.imag.fr>
Date: Mon, 12 May 2003 17:07:46 +0200
From: Sylvain DOT Ferriol AT imag DOT fr
To: cygwin AT cygwin DOT com
Subject: Re: suggestion for cygutils - usermod (was Re: howto change home  path in /etc/passwd)
References: <Pine DOT GSO DOT 4 DOT 44 DOT 0305121055540 DOT 393-100000 AT slinky DOT cs DOT nyu DOT edu>
In-Reply-To: <Pine.GSO.4.44.0305121055540.393-100000@slinky.cs.nyu.edu>
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Surlignage Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>:

> On Mon, 12 May 2003 Sylvain DOT Ferriol AT imag DOT fr wrote:
> 
> > Surlignage Max Bowsher <maxb AT ukf DOT net>:
> >
> > > Sylvain DOT Ferriol AT imag DOT fr wrote:
> > > > Yes , because i don't want to create a shell doing this:
> > > > grep -v $USERNAME /etc/passwd > /etc/passwd
> > >
> > sorry
> > but i don't know with sed how to delete a line starting with $USER
> 
> For the record: "sed '/'$USER':/d".  However, grep is perfectly adequate.
> What Max was warning you about was the shell redirection mechanism.  You'd
> be safer using something like
> 
>   cp -p /etc/passwd /etc/passwd-bak-tmp && grep -v $USERNAME
> /etc/passwd-bak-tmp > /etc/passwd && rm -f /etc/passwd-bak-tmp
> 
is it better to use $USER or $USERNAME??

sylvain
> > > Care! That will leave you with an empty /etc/passwd.
> > > The shell truncates /etc/passwd BEFORE grep reads it.
> > >
> > > > mkpasswd -l -u $USERNAME -p $HOME >> /etc/passwd
> > > >
> > > > sylvain
> > >
> > > Max.
> 
> Hope this helps,
> 	Igor
> -- 
> 				http://cs.nyu.edu/~pechtcha/
>       |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
> ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
>      |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski
>     '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!
> 
> Knowledge is an unending adventure at the edge of uncertainty.
>   -- Leto II
> 
> 




-------------------------------------------------
envoyé via Webmail/IMAG !


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