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Full Discussion: Running function or command concurrently in a bash script
Top Forums Shell Programming and Scripting Running function or command concurrently in a bash script Post 302278092 by dj_bridges on Monday 19th of January 2009 09:00:01 AM
Old 01-19-2009
CPU & Memory Running function or command concurrently in a bash script
I currently run a script over a vpnc tunnel to back-up my data to a remote server. However for a number of reasons the tunnel often collapses. If I manually restore the tunnel then the whole thing can continue, but I want to add into my script a section whereby while the transfer is taking place, the system checks if the tunnel is still up and if not it resets it. I though I had it cracked (see below), but even though the $BREAK variablet change after the process code had run, it didn't escape the while loop so the script never ended. I therefore think I need a different way of doing it (by the way I am new to scripting so expect some ugly code).....

I am not asking someone to write this for me, but if you know of a function that I could use that would be most helpful..... Thanks in advance.....

Code:
function process ()
{
process code.....
BREAK=500
}

# ------------- the script itself --------------------------------------
BREAK=0

# First run Tunnel to get it up and running (a separate script).
Tunnel.sh

# Run process and the while loop at the same time.
process &
while [ $BREAK == 0 ]
do
   Tunnel.sh #Re-establishes connection if required
   sleep 15
done

 

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LEARN ABOUT DEBIAN

gogoc

GOGOC(8)						    BSD System Manager's Manual 						  GOGOC(8)

NAME

     gogoc -- gogoCLIENT

SYNOPSIS

     gogoc [-h] [-?] [-y] [-n] [-b]
     gogoc [-f config_file] [-i interface_name] [-u interface_name] [-s interface_name] [-r retry_delay]

DESCRIPTION

     gogoc provides a means to configure a tunnel obtained from a tunnel server that supports the tunnel setup protocol (TSP).	gogoc will connect
     to a tunnel server and request a tunnel according to the specifications given in the configuration file.  As a background process, it will
     then monitor the state of the tunnel.  In the event of a timeout, gogoc will establish a new tunnel.

     gogoc currently supports three types of tunnels:

     - v6v4 (IPv6 over IPv4)
	Supported on FreeBSD, NetBSD, OpenBSD, Linux, Windows, Solaris, Darwin and OpenWRT.

     - v6udpv4 (IPv6 over UDP over IPv4)
	Supported on FreeBSD, Linux, Windows, Darwin and OpenWRT.

     - v4v6 (IPv4 over IPv6 (DSTM))
	Supported on FreeBSD and Windows.

ARGUMENTS

     The following options are available:

     -h, -?  Displays a short usage summary and quits.

     -y      Automatically accept server's public key.

     -n      Run as a foreground process.

     -b      Stop trying to reconnect upon first error received.

     -f configuration_file
	     Specifies a different configuration file.
	     Default is /etc/gogoc/gogoc.conf.

     -s interface_name
	     Overrides client_v4 in gogoc.conf(5)

     -i interface_name
	     Overrides if_tunnel_v6v4 in gogoc.conf(5)

     -u interface_name
	     Overrides if_tunnel_v6udpv4 in gogoc.conf(5)

     -r retry_delay
	     Overrides retry_delay in gogoc.conf(5)

SEE ALSO

     gogoc.conf(5)
     http://www.gogo6.com

ACKNOWLEDGMENT

     This software uses code taken from other organizations as :

     - RSA data security for md5.

     - The Apache Software Foundation for Base64 encoding and decoding.

AUTHORS

     gogo6 Inc.
     http://www.gogo6.com
     support@gogo6.com

gogoCLIENT							    May 7, 2007 							gogoCLIENT
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