On Fri, Aug 05, 2005 at 06:58:58PM -0500, Michael Martinell wrote:
> I am trying to figure out how to come up with a shell script that will cat
> or grep a file and if it contains the word SPAM it will then move it to
> another folder.
>
> I have been trying combinations of grep SPAM * | mv * ../spam however I
> don't know what to put in for * since the filenames are always changing.
Try something like this:
for n in *; do
grep SPAM $n >/dev/null && echo $n
done
The "n" after that first "for" means "take the list and repeatedly run the
loop, with a member of the list assigned to the variable 'n'".
The other weirdish piece is the ">/dev/null", which is just so that it
doesn't output anything even if it does match (which you expect to happen.
Then it uses the shell exit codes semantics to do the thing on the right of
the "&&" only if the exit code of the program on the left returns an exit
code (see: "echo $?" after running any command) of 0. In the case of grep,
it returns 0/true if it does match.
> I am guessing that I need to create an array by doing something with ls,
> however I am having trouble puzzling this one out.
Globs sort of make their own arrays - there are different places in the
shell where this array has meaning, one of them being the "for" command.
> This job would then run out of cron.
It obeys the "only output on failure" semantics, as far as I can think of,
so it'd fit right in (you'd do well to just put it in a /usr/local/bin
script or something and call it that way - rather than mashing it onto one
line for cron).
> Help is greatly appreciated.
Just killing time until my work's dev server comes up. =P
-rjk
http://sharpsaw.org
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