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/dev/null a file using xargs

 
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# 8  
Old 07-11-2011
Quote:
Originally Posted by jlliagre
Code:
find /data/logs/ -name server.log -size +10G -exec sh -c 'for i; do > $i; done' {} +

You need to add a command name between the sh command string and the arguments that find will pass to the shell. If the command name is absent, the first pathname from find will be assigned to $0 and will never be seen by the for loop (which in this case loops over "$@" -> $1..$N).

Modified exec primary: -exec sh -c 'for i; do > $i; done' sh {} +

Regards,
Alister

---------- Post updated at 05:40 PM ---------- Previous update was at 05:32 PM ----------

Quote:
Originally Posted by shamrock
And so is this...
Code:
find /data/logs/ -name server.log -size +10G -exec cp /dev/null {} +

That will almost certainly yield an error. When cp is called with more than 2 arguments, the final argument must be a directory.

Regards,
Alister
This User Gave Thanks to alister For This Post:
kalak
# 9  
Old 07-12-2011
Quote:
Originally Posted by alister
If the command name is absent, the first pathname from find will be assigned to $0 and will never be seen by the for loop (which in this case loops over "$@" -> $1..$N).

Modified exec primary: -exec sh -c 'for i; do > $i; done' sh {} +
Thanks for the correction. I indeed forgot to properly set $0.
# 10  
Old 07-12-2011
Quote:
Originally Posted by alister
That will almost certainly yield an error. When cp is called with more than 2 arguments, the final argument must be a directory.
I am not sure what makes you see more than 2 arguments Smilie
# 11  
Old 07-12-2011
Quote:
Originally Posted by shamrock
I am not sure what makes you see more than 2 arguments Smilie
My guess is you are misunderstanding how the final + works with find.
# 12  
Old 07-12-2011
Quote:
Originally Posted by jlliagre
My guess is you are misunderstanding how the final + works with find.
I see yes suppose i had only one file namd server.log in mind when i did that.
 
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