用tail同时查看多个文件的日志输出

如题，直接上代码（COPY来的）

#!/bin/sh
function clean()
{
#echo $@;
#for file in "$@"; do ps -ef|grep $file|grep -v grep|awk '{print $2}'|xargs kill -9; done
jobs -p|xargs kill -9
}
files=$@

# When this exits, exit all back ground process also.
#trap "ps -ef|grep tail|grep -v grep|awk '{print "'$2'"}'|xargs kill -9" EXIT
trap "clean $files " EXIT

# iterate through the each given file names,
for file in "${files[@]}"
do
# show tails of each in background.
tail -f $file &
done

# wait .. until CTRL+C
wait