Shell Programming and Scripting

until [[ -f file1_txt.zip && -f file1.txt && -f file2.txt.zip && -f file2.txt ]]
do
sleep 60
done
#Once file arrives, send e-mail with details
ls -lrt | tail -1 | mailx -s " files arrived" dummy.dum.com
touch /filearrived.txt

 
#!/bin/bash
#Find the YESTERDAY date. (below is the GNU date command)
YESTERDAY=$(date -d "YESTERDAY" +%Y%m%d)
DIR=/tmp/dir/to/watch
FILE_LIST=/tmp/filelist.txt
LS_OUT=/tmp/$$.out
MAIL_OUT=/tmp/mail.$$
ls -1 ${DIR} > ${LS_OUT}
while read FILENAME
do
 FILENAME=${FILENAME}_${YESTERDAY}.txt
 echo "Checking for ${FILENAME}
 grep "^${FILENAME}$" ${LS_OUT} && echo "${FILENAME} is available" >> ${MAIL_OUT} || echo "${FILENAME} is not available" >> ${MAIL_OUT}
 FILENAME=${FILENAME}_${YESTERDAY}.txt.zip
 echo "Checking for ${FILENAME}
 grep "^${FILENAME}$" ${LS_OUT} && echo "${FILENAME} is available" >> ${MAIL_OUT} || echo "${FILENAME} is not available" >> ${MAIL_OUT}
done < ${FILE_LIST}
grep "not" ${MAIL_OUT} >/dev/null && mailx -s "File status at 09:45" abc@xyz.com < ${MAIL_OUT}