BASH / Run a shell command when a file added / pb

[ekla]

Hi all, thanks to take time to read this.

I want to do something special : when a file is added (by ftp) to a specific folder, a script launch a command. I found a good script but maybe i made a mistake and i don't understand fully what each line said.

the trick is to watch /var/log/vsftpd.log
when a file is uploaded correctly, vsftpd return a line with "OK UPLOAD"

Code: Select all

tail -f /var/log/vsftpd.log | while read line; do
  if echo "$line" | grep -q "OK UPLOAD:"; then
    filename=$(echo "$line" | cut -d, -f2)
    if [ -s "$filename" ]; then
        echo "hello"
 fi
  fi
done

why it doesn't print hello when i upload a file ?
and i want to print hello also when the file uploaded contained RG14 in its filename.

If someone call help me, i spent all night on that...

Thanks

[DougieLawson]

Looks like you stole the code from http://stackoverflow.com/questions/1095 ... e-is-added

If your log has a line
Fri May 25 07:36:12 2012 [pid 94380] [joe] OK UPLOAD: Client "10.8.7.16", "/path/to/file.zip", 8395136 bytes, 845.75Kbyte/sec

Why not parse that with grep or awk.
awk '{split ($0,a,"OK UPLOAD"); print a[2]}' < /var/log/vsftpd.log | cut -d, -f2

[cdo]

Another option would be using inotifywait, as suggested here:
https://unix.stackexchange.com/question ... -new-files
I never tried this, but maybe it's worth a look.

[ekla]

Hi Dougie, yes you right ! stole nooooo just want to understand it !
As i'm so new in bash, i want to understand fully what every lines means.

why hello is not print when i upload a file ?

ok i will try your line. Thanks Dougie

[ekla]

Another option would be using inotifywait, as suggested here:
https://unix.stackexchange.com/question ... -new-files
I never tried this, but maybe it's worth a look.

yes i did that but with no success. i spent all night on that too.
Thanks

[DougieLawson]

This will run forever

Code: Select all

#!/bin/bash
FILE=""
while [ "$FILE" == "" ]; do
FILE=$(tail -1 /var/log/vsftpd.log | awk '{split ($0,a,"OK UPLOAD"); print a[2]}' | cut -d, -f2)
  if [ "$FILE" != "" ]; then
    echo "Filename:"$FILE" uploaded"
    FILE=""
  fi
done

[ekla]

This will run forever

Code: Select all

#!/bin/bash
FILE=""
while [ "$FILE" == "" ]; do
FILE=$(tail -1 /var/log/vsftpd.log | awk '{split ($0,a,"OK UPLOAD"); print a[2]}' | cut -d, -f2)
  if [ "$FILE" != "" ]; then
    echo "Filename:"$FILE" uploaded"
    FILE=""
  fi
done

As usual Dougie you have the answer. Thanks
I don't want to disturb you again because what i want to do is more complicated.
So really thanks to you

What i want to do is :
When a file like PG14_TR_UK-ST.MP4 is uploaded (completely) to the specific folder via FTP, the script copy paste the file to a folder called PG14 and create 2 others folders LQ and HQ. After the copy paste the script delete the file on the FTP folder and launch an avconv job to encode the file with specific options compared part of the name of the file. When finished it sends a mail to say "hey dude your file is ready to download". Other files like PG14_TR_FR-ST.MP4 are uploaded and the script knows that there is already a folder PG14 so it copy paste, delete and do another avconv job, and mail notification. And again and again with new files PG15,...

so first > MORE COFFEE