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Moved variables out to fix process checking #1

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Moved variables out to fix process checking #1

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21 changes: 12 additions & 9 deletions tunnel.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -12,20 +12,21 @@


#!/bin/bash
createTunnel() {
#Definitions
# Originating Side = the host that runs this script that connects to a remote side and creates a tunnel back to itself
# remote side - the tunnel host.

keyFilePath="" #path to private key identity file
SSHremotePort="22" #remote side SSH service port. Normally 22, change if different
SSHTunnelPort="2222" #remote side port that the tunnel will be bound to (think high port numbers, e.g. 2222, 5555, etc.)
SSHlocalPort="22" #port where SSH runs on the originating side (normally 22, change if different)
identity="username@host" #username and IP/host of remote side

# This command will create a tunnel on the remote side, bound to the remote side *localhost only* to the SSHTunnelPort.
# on the remote side it can be accessed by: /usr/bin/ssh -l username -p 2222 localhost (where username is a user on the originating system)
# this will connect back to the originating side SSH service and present you with a login prompt or accept your key and log you in.
createTunnel() {
#Definitions
# Originating Side = the host that runs this script that connects to a remote side and creates a tunnel back to itself
# remote side - the tunnel host.

# This command will create a tunnel on the remote side, bound to the remote side *localhost only* to the SSHTunnelPort.
# on the remote side it can be accessed by: /usr/bin/ssh -l username -p 2222 localhost (where username is a user on the originating system)
# this will connect back to the originating side SSH service and present you with a login prompt or accept your key and log you in.

/usr/bin/autossh -i "$keyFilePath" -p "$SSHremotePort" -N -R "$SSHTunnelPort":localhost:"$SSHlocalPort" "$identity"
if [[ $? -eq 0 ]]; then
Expand All @@ -35,9 +36,11 @@ identity="username@host" #username and IP/host of remote side
fi
}

PROCESS_NUM=$(ps -ef |grep "2222\:localhost\:703" |wc -l)
PROCESS_NUM=$(ps -ef |grep "$SSHTunnelPort\:localhost\:$SSHlocalPort" |wc -l)
if [ "$PROCESS_NUM" == "0" ]; then
echo Creating new tunnel connection...
createTunnel
echo Tunnel created...
else
echo Tunnel already active...
fi
fi