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Re: [Findutils-patches] [PATCH] This change adds a sleep between invocat

From: Eric Blake
Subject: Re: [Findutils-patches] [PATCH] This change adds a sleep between invocations of cmd.
Date: Tue, 20 Sep 2011 13:05:53 -0600
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On 09/20/2011 12:33 PM, ed wrote:
Gave that a go today on a vanilla xargs and it doesn't seem to work:

   $ perl -e 'for(my $a=0;$a<100;$a++){print $a,"\n";}' | xargs -l2 sh -c
   'sleep 1&&exec /bin/echo "$@"'

For whatever reason the shell seems to throw the first argument away.

The first argument becomes $0 to the shell, so you need to inject a dummy. You meant:

perl -e 'for(my $a=0;$a<100;$a++){print $a,"\n";}' \
 | xargs -l2 sh -c 'sleep 1 && exec /bin/echo "$@"' sh

so that your dummy 'sh' provides the proper $0, and the rest of your arguments are used as you meant.

Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library

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