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X-Authentication-Warning:	slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date:	Tue, 18 Nov 2003 14:01:33 -0500 (EST)
From:	Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To:	cygwin AT cygwin DOT com
To:	alan DOT miles AT ieee DOT org
cc:	cygwin AT cygwin DOT com
Subject:	Re: Diff for generic readme and generic-build script
In-Reply-To:	<JLEBIHHBMBHBAFPAJLEFIEOHELAA.miles0201@cox.net>
Message-ID:	<Pine.GSO.4.56.0311181356530.8212@slinky.cs.nyu.edu>
References:	<JLEBIHHBMBHBAFPAJLEFIEOHELAA DOT miles0201 AT cox DOT net>
Importance:	Normal
MIME-Version:	1.0

On Mon, 17 Nov 2003, Alan Miles wrote:

> [snip]
> 7/ Note: the -i option to sed (quoting the man page for sed):
>
>    -i[suffix], --in-place[=suffix]
>        edit files in place (makes backup if extension supplied)
>
>    Extended sed command:
>
>    `e [COMMAND]'
>      This command allows one to pipe input from a shell command into
>      pattern space.  Without parameters, the `e' command executes the
>      command that is found in pattern space and replaces the pattern
>      space with the output; a trailing new-line is suppressed.
>
>      If a parameter is specified, instead, the `e' command interprets
>      it as a command and sends it to the output stream (like `r' does).
>      The command can run across multiple lines, all but the last
>      ending with a back-slash.
>
>      In both cases, the results are undefined if the command to be
>      executed contains a NUL character.
>
>    These together constitute the operation of the modifications.

Note: the -i option to sed is buggy, as it will go into an infinite loop
if /tmp is not writable (which does happen occasionally with Cygwin).
It's better to use explicit redirection and renaming instead.
	Igor
-- 
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