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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 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.22) Gecko/20110906 Fedora/3.1.14-1.fc14 Lightning/1.0b3pre Mnenhy/0.8.3 Thunderbird/3.1.14 |
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 $a,"\n";}' | xargs -l2 sh -c
'sleep 1&&exec /bin/echo "$@"'
1
3
5
^C
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 http://libvirt.org