On Wed, 4 Nov 2009, Stewart Walters wrote:
> I've been searching for a noclobber option in scp or ssh (seeing as openssh's
> scp just invokes ssh anyway), but I can't find one. The closest I came was
> finding this page (http://www.ma.hw.ac.uk/~katie/helpfulness.html) but
> unfortunately in this instance "Katie's Page of Helpfulness" isn't that
> helpful
> :)
hi Stewart, there is no no-clobber option in scp.
> I haven't pulled the source code and searched for a noclobber option though,
> which might be an option to you. It could be that the functionality exists
> but
> is badly documented outside of source code.
not the case, scp just opens the file without checking if it
exists or not.
> Apart from that, the only thing I can think of is that you write a script to
> first ssh to the remote system using the -c option to launch a command, and
> check that the destination file exists in the first place. If it doesn't,
> only
> then use a second command for scp to copy it to the remote system.
you can do something like this, in one command:
cat file | ssh xxx "[ -f file ] && exit; cat >file"
J.
--
Jan Pechanec
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