Catching exception of commands executed under ssh and su Post: 302804421

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Top Forums Shell Programming and Scripting Catching exception of commands executed under ssh and su Post 302804421 by avikaljain on Wednesday 8th of May 2013 02:33:18 PM

05-08-2013

Registered User

Catching exception of commands executed under ssh and su

Hello experts,

I have one wrapper script which runs on server104, the purpose of the script is to ssh on server109; perform su to application user; and execute exports script.

I want wrapper script to stop executing further if my exports script comes out with exit 1. My current setup keeps on running even if the export script fails at some point, I believe this is because I am running it under ssh command since it returns exit 0 to my current shell.

Script looks like this:

Code:

ssh -i /opt/apps/lib/keys/nfs_appsadm_key $apps_USER@$SOURCE_MACHINE_NAME <<EOT 

echo $SOURCE_SW_NAME 
sudo su - $SOURCE_SW_USER <<EOT 
  
        /opt/apps/home/apps/bladelogic_scripts/export.sh -t $TICKET_NUMBER -f $LIST_FILE 
                        
exit 
EOT 
echo Export of source apps complete  | tee  -a $BATCH_PROMO_LOG 
  
echo "####Copying the exported content from $EXP_DIR on $SOURCE_MACHINE_NAME to $IMP_DIR on localhost.####" 

scp -i /opt/apps/lib/keys/nfs_appsadm_key -r $apps_USER@${SOURCE_MACHINE_NAME}:${EXP_XFR_DIR}/*.* $IMP_DIR 
echo "Changing permission of recently modified files in $IMP_DIR" 
cd $IMP_DIR 
find . -type f -mtime -1 -exec chmod 777 {} \; 
#chmod -R 777 $IMP_DIR/*.txt
#chmod -R 777 $IMP_DIR/"$TICKET_NUMBER"_detail.txt

I can write the exit code of exports script in a temp file and then scp it to server109, check its existence and code wrapper to come out if it exists but feel I am complicating it, any easy solutions to catch the exception and stop execution of wrapper if exports script throws error?

Any feedback is appreciated.

Thank You.

avikaljain

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LEARN ABOUT PHP

ssh-argv0

SSH-ARGV0(1)						    BSD General Commands Manual 					      SSH-ARGV0(1)

NAME

     ssh-argv0 -- replaces the old ssh command-name as hostname handling

SYNOPSIS

     hostname | user@hostname [-l login_name] [command]

     hostname | user@hostname [-afgknqstvxACNTX1246] [-b bind_address] [-c cipher_spec] [-e escape_char] [-i identity_file] [-l login_name]
     [-m mac_spec] [-o option] [-p port] [-F configfile] [-L port:host:hostport] [-R port:host:hostport] [-D port] [command]

DESCRIPTION

     ssh-argv0 replaces the old ssh command-name as hostname handling.	If you link to this script with a hostname then executing the link is
     equivalent to having executed ssh with that hostname as an argument.  All other arguments are passed to ssh and will be processed normally.

OPTIONS

     See ssh(1).

FILES

     See ssh(1).

AUTHORS

     OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
     Theo de Raadt and Dug Song removed many bugs, re-added newer features and created OpenSSH.  Markus Friedl contributed the support for SSH
     protocol versions 1.5 and 2.0.  Jonathan Amery wrote this ssh-argv0 script and the associated documentation.

SEE ALSO

     ssh(1)

Debian Project							 September 7, 2001						    Debian Project