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Re: Diff for generic readme and generic-build script
- From: Igor Pechtchanski <pechtcha at cs dot nyu dot edu>
- To: alan dot miles at ieee dot org
- Cc: cygwin at cygwin dot com
- Date: Tue, 18 Nov 2003 14:01:33 -0500 (EST)
- Subject: Re: Diff for generic readme and generic-build script
- References: <JLEBIHHBMBHBAFPAJLEFIEOHELAA.miles0201@cox.net>
- Reply-to: cygwin at cygwin dot com
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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