Am 02. Dez, 2008 schwätzte Dazed_75 so:
On Tue, Dec 2, 2008 at 4:35 PM, der.hans <[EMAIL PROTECTED]> wrote:
Am 02. Dez, 2008 schwätzte Dazed_75 so:
moin moin,
I know I could figure this out, and will tomorrow if no one gives me
the answer in the next hour. I have a file with many mv xxx yyy
commands and want to make another file with mv yyy xxx commands so
just need to swap the arguments. I have to go do some things now and
have a meeting tonight so would appreciate a reminder how to do this.
I know it is trivial but just don't remember how right now. Thanks in
advance.
This command presumes there are no spaces in xxx and yyy and that yyy is
the last thing on each command line. Adjust as necessary.
$ echo mv xxx yyy | sed -re 's/ ([^[:space:]]+) ([^[:space:]]+)$/ \2 \1/'
mv yyy xxx
You could also use cut and some variable assignments.
ciao,
der.hans
--
The source file contains real file names as the xxx and yyy dummys I
was trying to communicate so they would BE the variable names.
Basicly the source file contains mv commands to rename a whole bunch
of files and the file I need to create contains the commands to name
them back to the original names.
Sorry, I am late and have to run. Will check email once more before I
leave. Your command may well be right but I was surprised to see
actual xxx and yyys in there. I haven't used sed in maybe 20 years.
No xxxs and yyys in the command, just in the sample data :).
I should go ahead and handle the mv as well since you've specified it.
$ echo mv fred anke | sed -re 's/mv ([^[:space:]]+) ([^[:space:]]+)$/mv \2
\1/'
mv anke fred
The following looks for mv followed by a space followed by one or more
non-spaces, followed by a space, followed by one or more non-spaces
followed by the end of the line.
It then creates mv followed by a space, followed by the second set of
non-spaces, followed by a space, followed by the first set of non-spaces.
sed -re 's/mv ([^[:space:]]+) ([^[:space:]]+)$/mv \2 \1/'
I just included sample data and output in the original example.
ciao,
der.hans
--
# http://www.LuftHans.com/ http://www.LuftHans.com/Classes/
# "It's not that I'm so smart, it's just that I stay with problems longer."
# -- Albert Einstein
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