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Unix script to detect new file entry in directory

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# 1  
Old 10-10-2008
Question Unix script to detect new file entry in directory
Hi All,

I want to detect each new file coming / getting created in unix directory.

When every new file came to directory, i have to get its details like its size , date and time stamp and store it into another file.

Could any one please tell me , how i can achieve that?

Thanks.
# 2  
Old 10-10-2008
man ls
Code:
ls -ltr | tail -1

# 3  
Old 10-10-2008
Hi,

I think this command will only give me the last file came to directory.

But, consider scenario when at same time more than 1 file came to directory. This command will not consider other files .

Further can i write this command in script and execute that script continuously ?

Do anybody has script wrtten for it ?

Thanks a lot for replying.
# 4  
Old 10-10-2008
Hi,

Or may be i can put my question as :

" One script should run everytime when new file comes to directory".

is this possible in UNIX ?

Please reply.

Thanks.
# 5  
Old 10-10-2008
Did you mean file system directory listeners ?
# 6  
Old 10-10-2008
You have either the choice that a script/program is running all the time and scanning that dir to inform you or maybe a cronjob running "only" every minute and checking let's say with something like:
Code:
TMP_FILE="/tmp/last_num_of_files.tmp"
NUM_BEFORE=`cat ${TMP_FILE}`
NUM_NOW=`ls -1 /somedir/*xml| wc -l | awk '{print $1}'`

if (( ${NUM_NOW} > ${NUM_BEFORE} )); then
     echo "Hey, it changed!"| mail -s "New files arrived" me@server.org"
fi

echo ${NUM_NOW} > ${TMP_FILE}

exit 0

# 7  
Old 10-10-2008
Quote:
NUM_NOW=`ls -1 /somedir/*xml| wc -l | awk '{print $1}'`
small change on top of it

Code:
NUM_NOW=`ls -1  | awk '{ cnt++ }END { print cnt }'`
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