FTP bash script

Question

I would like to create a script that will upload a file until the upload uperation will successfull. The script will monitoring the log file. If "not connected" to the server i want to repeat the upload operation until "connected" and "file successfully transferred" Anyone can help me to build the correct one pls. What should i write after if egrep "not...?

 LOGFILE=/home/transfer_logs/$a.log
 First=$(egrep "Connected" $LOGFILE)
 Second=$(egrep "File successfully transferred" $LOGFILE)

  ftp -p -v -i 192.163.3.3 < ../../example.script > ../../$LOGFILE 2>&1

  if
  egrep "Not connected" $LOGFILE; then

  ftp -p -v -i 192.163.3.3 < ../../example.script > ../../$LOGFILE 2>&1

  until
  [[ -n "$first" ]] && [[ -n "$second" ]]; 
  done
  fi

example contains:

  binary
  mput a.txt
  quit

Are you locked into ftp? What about scp? If you absolutely must use ftp, check out expect. It's tailor-made for scripting control of interactive sessions. — Gus
– Gus, Commented Nov 27, 2012 at 21:50
I'm not sure if the exit status of ftp is useful, but if so, it would be more robust than grepping the output. — Thomas
– Thomas, Commented Nov 27, 2012 at 21:51
may be a bad example, I dont know how i should do it. I just want to repeat the upload operation until the file upload will succesfull. — Smithis
– Smithis, Commented Nov 27, 2012 at 21:54
what if someone has changed your ftp password on the remote side? You'll lock your account, unless you add more robust error checking. If this is strictly a one off you can make it work. But be advised that just about every OS has different ftp clients and they all follow different rules that you'll need to code for (if you want a generic tool). Also, I think you should be able to just put your ftp cmd inside the until loop proper. Those vars will evaluate false the first time, and then immediately execute the ftp cmd. both will have to pass before you quit. (Thats how until loops work). GdLk — shellter
– shellter, Commented Nov 27, 2012 at 22:15

William Pursell · Accepted Answer · 2012-11-27 23:35:15Z

1

while :; do
    ftp ... > $LOGFILE
    grep -qF Connected $LOGFILE && 
    grep -qF "File successfully transferred" $LOGFILE && break
done

answered Nov 27, 2012 at 23:35

William Pursell

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6 Comments

William Pursell Over a year ago

@Smithis Are you familiar with man pages? RTFM. And, no, the quotes are not necessary. Have you tried the commands given above?

Smithis Over a year ago

i tried yes, after running it gives nothing back, must ctr+z to stop

William Pursell Over a year ago

What do you mean "it gives nothing back"? Do you mean that it is stuck in the loop continually trying to ftp, and therefore not returning? You mention <ctrl>-z, so I assume you are running on windows; if you're on Unix/Linux, it would be better to use ^C.

William Pursell Over a year ago

Try adding -x to the shebang: #!/bin/bash -x. Or add set -x before the while loop. That is useful for debugging.

Smithis Over a year ago

it cannot connect to the server but dont know why. and yeah it is stuck

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