rsync doesn't exit (is hanging) in script, but not on command line!

[Gian G. Spicuzza]

Hi, 

I don't know much about perl, but I can suggest doing a little upgrading.

Perl is up to v5.8.8
Rsync is up to v2.6.7pre3

Your version of rsync is years old and is vulnerable to multiple 
security advisories.

Thanks,

Gian

>I have two identical (HW&SW) linux servers in my network. On both there is a
>user called qipadmin, which can access over SSH to each other.
>I wrote a perl script, which should copy files with rsync from one server to
>the other. Below is the rsync command in the script.
>The script is invoked by the root user.
>
>system "su - qipadmin -c 'rsync -e ssh -p
>$otherip:/opt/named/current/conf/db.* /opt/named/current/conf --exclude
>*.jnl*'"
>
>rsync copies the files but the problem is, that the rsync command never
>exits (is hanging) and so the script cannot continue (unless I do manual
>kill of the rsync process):
>
>ps -ef | grep rsync
>root     21290 21259  0 10:54 ?        00:00:00 su - qipadmin -c rsync -e
>ssh -p 10.10.1.242:/opt/named/current/conf/db.*
>/opt/named/current/conf --exclude *.jnl*
>qipadmin 21291 21290  0 10:54 ?        00:00:00 rsync -e ssh -p
>10.10.1.242:/opt/named/current/conf/db.* /opt/named/current/conf --exclude
>*.jnl*
>qipadmin 21384 21291  0 10:54 ?        00:00:00 rsync -e ssh -p
>10.10.1.242:/opt/named/current/conf/db.* /opt/named/current/conf --exclude
>*.jnl*
>
>On the command line I can do the following without any problems (rsync exits
>successfully):
>
>su - qipadmin -c 'rsync -e ssh -p 10.10.1.242:/opt/named/current/conf/db.*
>/opt/named/current/conf --exclude *.jnl*'
>
>
>What is the difference between
>
>system "<cmd>" (perl)
>
>and
>
><cmd> (shell command line)?
>
>Or is there a bug in rsync?
>
>additional infos:
>- rsync version: 2.5.7
>- kernel: 2.4.32
>- perl: 5.8.0
>
>
>I hope there is somebody who can help me. I'm very frustrated.
>
>
>
>
>  
>
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