Bash and sftp

solar05 · 06-30-2009, 06:45 AM

Hello, I need to copy every hour some files from local directory to remote vis sftp.
I open 1 session for all files and copy them to remote host with mput.
But if the copying would be wrong - for example connection would be lost. How I can know abouit it in the Bash.

PHP Code:



#!/bin/bash

OUTDIR="/outdir"

TARGET_HOST=localhost

TARGET_USER=root

TARGET_DIR="/indir"

DATE_LOG=`date +%R-%d-%m-%Y`

FTPLOG="/log/$DATE_LOG.log"

SLEEP_INTERVAL=60

while [ 1 ]; do

sftp -b /dev/fd/0 $TARGET_USER@$TARGET_HOST>>$FTPLOG 2>&1<<EOT

lcd $OUTDIR

mput *.zip

chmod 666 *.zip

exit

EOT

sleep $SLEEP_INTERVAL

done

nuwen52 · 06-30-2009, 07:14 AM

First, in timed things like this, you might consider building this as a cron job. It can make the script less complex and gets rid of the need of another programming running all of the time.

Now then, to answer your actual question. After:
sftp -b /dev/fd/0 $TARGET_USER@$TARGET_HOST>>$FTPLOG 2>&1<<EOT
try checking the exit status of sftp. Like:

Code:

RET=$?
if [ $RET -eq 0 ]
then
    it worked
else
    it didn't
fi

"$?" is the return code for the previously executed process. Usually, if it's zero, everything is fine.

solar05 · 06-30-2009, 11:44 PM

Quote:

Originally Posted by nuwen52

First, in timed things like this, you might consider building this as a cron job. It can make the script less complex and gets rid of the need of another programming running all of the time.

Now then, to answer your actual question. After:
sftp -b /dev/fd/0 $TARGET_USER@$TARGET_HOST>>$FTPLOG 2>&1<<EOT
try checking the exit status of sftp. Like:

Code:

RET=$?
if [ $RET -eq 0 ]
then
    it worked
else
    it didn't
fi

"$?" is the return code for the previously executed process. Usually, if it's zero, everything is fine.

Yes, it may be use when the connection will fail, but if while during
sftp session working on remote computer and there script could'nt copy some files or some permissions incorrect. And that its why sftp will give

Code:

RET=$?

TRUE but files didn't copy to remote host. How I can see that all files copyed successfully?

chrism01 · 07-01-2009, 12:37 AM

If you want to know the status of the copy and chmod on a file-by-file basis, you'll need to replace the while loop with

for file in *.zip
sftp ....
lcd ..
put $file

ie perform the copy, then exit and check the status, then do another sftp cxn and run the chmod cmd and check it.

solar05 · 07-01-2009, 01:28 AM

Quote:

Originally Posted by chrism01

If you want to know the status of the copy and chmod on a file-by-file basis, you'll need to replace the while loop with

for file in *.zip
sftp ....
lcd ..
put $file

ie perform the copy, then exit and check the status, then do another sftp cxn and run the chmod cmd and check it.

Yes it's good desicion, but I want to copy all files in 1 sftp session, and don't use per each file each sftp session

chrism01 · 07-01-2009, 01:36 AM

Then you can't do it... in SFTP
Look, you can either send & chmod all the files in one go, then use an ssh session to do a remote 'ls -l' (assuming you can ssh in), or you check each operation as you go.
Your choice.

Another way that might do what you want with one session would be to use one of the Perl SSH modules. I think you'd be able to do an scp within the ssh session, as well as the chmod cmd, and check as you go.