Shell returns all files when regex doesn't match any file in directory? -

i use below command in shell file , works fine in directories regex matches. problem is, lists files when there no match regex. knows why has behaviour?
there anyway avoid it?

find  . -type f -mtime +365 | egrep '.*xxx.yyy*.*'|grep -v "[^.]/" | xargs ls -lrt | tr -s " " | cut -d" " -f6-9 

thanks time. note: m using script splunk forwarder on solaris 8.

if input of xargs empty, execute ls -lrt in current folder.

try xargs -i "{}" ls -lrt "{}" instead. forces xargs put input arguments place in command executes. if doesn't have input, can't , skip running command @ all.

if have gnu xargs, can use switch --no-run-if-empty instead.

if doesn't work, try move greping find, can use -ls display list of files. avoid running ls command if no file matches.