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Top Forums Shell Programming and Scripting Referring from the print of the previous command Post 302298621 by bobb on Wednesday 18th of March 2009 06:58:28 AM
Old 03-18-2009
Referring from the print of the previous command

Hi,

I am a newbie in SHell Programming.
I want to ask something about referring the result of the previous command in Shell-Prog.

For example :
bnm@dsds~> ifconfig

eth0 Link encap:Ethernet HWaddr 00:0B:CD:85:A5:8A
inet addr:192.168.0.2 Bcast:192.168.0.225 Mask 255.255.255.0


bnm@dsds~> next command ???


My question is : What should i type as the next command ??? using
the if-statement below :
--------------
if [ HWaddr is equal to 00:0B:CD:85:A5 ]; then
.....
fi
--------------
so that it will refer to the HWaddr 00:0B:CD:85:A5 printed
as the result of the previous command ?


Thanks in advance.

Bob
 

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ROUTE.CONF(5)						      BSD File Formats Manual						     ROUTE.CONF(5)

NAME
route.conf -- static routes config file DESCRIPTION
The route.conf file is read by the staticroute rc.d script during system start-up and shutdown, and is intended for adding and removing static routes. FILE FORMAT Lines starting with a hash ('#') are comments and ignored. Lines starting with a plus sign ('+') are run during start-up, while lines start- ing with a minus sign ('-') are run during system shutdown. If a line starts with a '!', the rest of the line will get evaluated as a shell script fragment. All other lines are passed to route(8). During start-up, they are passed behind a ``route add -'' command and during shut- down behind a ``route delete -'' command. FILES
/etc/route.conf The route.conf file resides in /etc. /etc/rc.d/staticroute rc.d(8) script that parses route.conf. EXAMPLES
In this example, the interface for the desired routing changes is set, the IP address on that interface is determined, and a route is added during startup, or deleted during system shutdown. # Set interface and determine current IP address for added route. !ifname=bnx0 !ipaddr=$(/sbin/ifconfig ${ifname} | awk '$1 == "inet" {print $2}') net 10.10.1 -interface ${ipaddr} In this example, IP forwarding is turned on during start-up, and a static route added for 192.168.2.0. During system shutdown, the route is removed and IP forwarding turned off. # Turn on/off IP forwarding. +sysctl -w net.inet.ip.forwarding=1 -sysctl -w net.inet.ip.forwarding=0 net 192.168.2.0 -netmask 255.255.255.0 192.168.150.2 SEE ALSO
rc.conf(5), rc(8), route(8) BSD
May 1, 2012 BSD
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