pdf.sh

该shell可以每15秒检测当前目录是否创建或删除了.pdf或.PDF的文件

#!/bin/sh
while [  1 ]
do
ls>infile1
sleep 15
ls>infile2
flag=1
flag2=0
for i in  ` comm -23 infile2 infile1`
do
  if  [ "${i##*.}" = "pdf" ] || [ "${i##*.}" = "PDF" ]
   then
     flag=$(($flag-1))
    if [ "$flag" -eq 0 ]
      then
        flag2=$(($flag2+1))
        echo "The flowing pdf file(s) have been created in the last 15 seconds:"
     fi   
    
   echo $i
   fi
done


for i in  ` comm -23 infile1 infile2`
do
  if  [ "${i##*.}" = "pdf" ] || [ "${i##*.}" = "PDF" ]
   then
     flag=$(($flag-2))
    if [ "$flag" -eq -1 ] || [ "$flag" -eq -2 ]
      then
        flag2=$(($flag2-2))
        echo "The flowing pdf file(s) have been deleted in the last 15 seconds:"
     fi
                                                                                                  
   echo $i
   fi
done


if [ "$flag2" -eq 0 ] ; then
  echo "No pdf files have been created or removed in the last 15 seconds"
 fi
#case "$flag2" in
#1 && 
#fi

done