tar asking if I want to overwrite

[Chrissirhc]

Hi in my script when I run tar cf $archiveXMLs *.xml

where $archiveXMLs is myChosenNameOfTar.tar, if myChosenNameOfTar.tar already exists the script asks me if I want to overwrite it. I always want to overwrite it, so what switch should I use to make it not ask me??

Thanks,

Chris

 

[comtec17]

You could add a line to do a rm -f or cp the file using a new name prior to you starting to write the file again.

 

[Chrissirhc]

Thanks Comtec,

That's an option. Would you know if there is a way to force a yes though with tar command?? I have a few tar commands in the script. Also that would also just be nice to know.

Thanks,

Chris

 

[Annihilannic]

How about tar cf - *.xml > $archiveXMLs.


Annihilannic.

 

[PHV]

Anyway, what about

 man tar

?

Hope This Help
PH.

 

[Chrissirhc]

I had looked up tar on the computerhope unix manual pages and didn't find anything. Would you know off-hand?

 

[Chrissirhc]

Hi,

Is there a switch to just make the tar command force overwrite existing files?

I could test for the existance of the file first and delete it or try Annihilannics example if neccessary.

However I'd ilke to know for accademic reasons.

Thanks,

Chris

 

[Annihilannic]

Not that I know of, I've never seen tar complain about overwriting an existing file before.

What operating system is it?

Annihilannic.

 

[mrregan]

are you testing the script by running each command from a command line? If you run a true script, it should not complain.

 

[Chrissirhc]

Its Sun Solaris.

I'm running it from a script. I need to also test from a crontab.

Thanks

 

[mrregan]

This link says to use -u option to unconditionally overwrite

http://216.239.51.104/search?q=cach....1.html+solaris+cpio+overwrite&hl=en&ie=UTF-8

 

[mrregan]

Sorry,
I was thinking cpio , not tar.