指定されたディレクトリ内部でgit pullするのをディレクトリ分、繰り返すshell script ref: http://qiita.com/sakadon/items/3aded92edc5867dbb0a5

file0.txt

#!/bin/bash

set -eu

nowdate=`date "+%Y/%m/%d %T"`
host=`hostname -f`

echo -e '!!start git pull carnival!!' | ./slack.sh

find /var/www/html -mindepth 1 -maxdepth 1 -type d | while read FILE
do
        echo '----------'
        echo 'find: '${FILE}
        cd ${FILE}

        pwdmsg=$(pwd)
        gitmsg=$(git pull)

        slackpost=${pwdmsg}'\n'${gitmsg}
        echo -e ${slackpost} | ./slack.sh
done

echo -e '!!done git pull carnival!!' | ./slack.sh