Shell Programming and Scripting

I use the .netrc to login. The other if condition someone suggested did not do anything at all. It never detected the errors at all. it alwars returns a 0 so that if is useless. My design works just fine for the login id check if it failed or not. That is all I wanted to do at this point. I also have another ping check which I did not list here to check if the server is even reach-able. The login failed check works. Again I was hoping to have a one command check, but no easy way in the ftp scripting !

---------- Post updated at 04:33 PM ---------- Previous update was at 04:32 PM ----------

Thank you all for participating in this log.

If the FTP client doesn't return proper error codes, looking at the logfile is about all you can do.

Tip about "ping". Send a couple of packets and totally ignore the result. Then send your real "ping" test.

The ftp protocol is crude from 20+ years ago but is still in use because it is simple and is the only TCP/IP File Transfer Protocol which works across disparate platforms regardless of their age.

In system design ftp is the last resort when all modern secure protocols are not available. In practice ftp is in widespread use because it is simple and easy to use.

My "reliable" ftp scripts rarely exceed 600 lines.


@mrn6430
The return code from ftp is indeed zero when the password ifs wrong. It is non-zero when the file transfer failed. Still worth checking the return code from ftp.

Code:

# Somethng like
ftp  ;  REPLY=$?

Hi, consider this ftp code:

Code:

ftp -n  << EOF > $LOG_FILE
   verbose
   open ${SERVER} 
   $LOGON
   binary
   cd ${REMOTE_FILE_PATH}
   put ${LOCAL_FILE_NAME}
   close
   bye
EOF

FILE_TRANSFER_COUNT=`cat ${LOG_FILE} | grep -v 'bytes' | grep -c ^'226 '`
IS_FTP_FAILED=`cat ${LOG_FILE} | grep ^'530 Login incorrect' | wc -l`

if [ ${IS_FTP_FAILED} -ne 0 ]
then
  echo "Ftp failed"
  sendmail ... page ...
fi

There will be an FTP code number for a success or every kind of failure
If you see a line starting with '226 ' then it's success
If you want to be notified for a failed FTP no matter what's the reason then check for count of lines starting with '226 ', if the count is zero then notify failure

If you want to know for login failure, find the FTP code (530 Login incorrect.) for this and search for this line

Thanks,
-srinivas yelamanchili