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Top Forums Shell Programming and Scripting Finding out if you are in an ssh session Post 302308465 by neked on Saturday 18th of April 2009 01:44:05 PM
Old 04-18-2009
Finding out if you are in an ssh session

Hey,

I'm trying to build customized behavior in a bash script for when it is run within an ssh session. This is how I'm finding out if the current session is ssh:

Code:
USER=`whoami`                                                                                                                  
CURRENT_TTY=`ps -Alf | grep $$ | head -n 1 | gawk '{print $13}'`                                                               
(! ( ps -Alf | grep "sshd: $USER@$CURRENT_TTY" | grep -v grep )) > /dev/null                                                   
IS_SSH_SESSION=$?

I'm wondering if anyone knows of a better way to do this?
 

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SSH-COPY-ID(1)						      General Commands Manual						    SSH-COPY-ID(1)

NAME
ssh-copy-id - install your public key in a remote machine's authorized_keys SYNOPSIS
ssh-copy-id [-i [identity_file]] [user@]machine DESCRIPTION
ssh-copy-id is a script that uses ssh to log into a remote machine (presumably using a login password, so password authentication should be enabled, unless you've done some clever use of multiple identities) It also changes the permissions of the remote user's home, ~/.ssh, and ~/.ssh/authorized_keys to remove group writability (which would oth- erwise prevent you from logging in, if the remote sshd has StrictModes set in its configuration). If the -i option is given then the identity file (defaults to ~/.ssh/id_rsa.pub) is used, regardless of whether there are any keys in your ssh-agent. Otherwise, if this: ssh-add -L provides any output, it uses that in preference to the identity file. If the -i option is used, or the ssh-add produced no output, then it uses the contents of the identity file. Once it has one or more fin- gerprints (by whatever means) it uses ssh to append them to ~/.ssh/authorized_keys on the remote machine (creating the file, and directory, if necessary) SEE ALSO
ssh(1), ssh-agent(1), sshd(8) OpenSSH 14 November 1999 SSH-COPY-ID(1)
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