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Full Discussion: awk not escape my bash variable
Top Forums Shell Programming and Scripting awk not escape my bash variable Post 302545780 by winggundamth on Tuesday 9th of August 2011 01:28:12 PM
Old 08-09-2011
awk not escape my bash variable
I tried to parse data from switch configuration files

Code:
vlan 1727 name SQ5506-15 by port
 tagged ethe 8/1 to 8/2 
 untagged ethe 1/13 
!
vlan 2105 name SQ5620-7007(BR2) by port
 tagged ethe 8/1 to 8/2 
 untagged ethe 1/17 
!
interface ethernet 1/13
 port-name SQ5506-15.nic0
 rate-limit input fixed 10000000
 sflow forwarding
!
interface ethernet 1/17
 port-name SQ5620-7007.nic0
 rate-limit input fixed 100000000
 sflow forwarding
!

At first I parse interface number by device name and switch path with this command

Code:
INTERFACE=`awk '/^vlan(.*)'"$DEVICE "'(.*)/,/^!/' "$SWITCH_PATH" | awk '/untagged/{print $3}'`

Then I tried to get rate limit from interface that I parse from above with this command

Code:
RATELIMIT=`awk '/^interface ethernet '"$INTERFACE"'\r(.*)/,/^!/' "$SWITCH_PATH" | awk '/rate-limit/{print $4}'`

But it is showing an error

Code:
awk: /^interface ethernet 1/13\r(.*)/,/^!/
awk:                          ^ backslash not last character on line

If $INTERFACE is single number like "74" it will work but if $INTERFACE has forward slash like "1/13" it will showing an error as above. I have tried with put direct interface number and found that I have to put backslash before forward slash in interface number like this

Code:
RATELIMIT=`awk '/^interface ethernet '"1\/13"'\r(.*)/,/^!/' "$SWITCH_PATH" | awk '/rate-limit/{print $4}'`

I also tried with awk -v too but no luck. It is showing no error but still can't get value what I want

Code:
RATELIMIT=`awk -v INTERFACE="$INTERFACE" '/^interface ethernet INTERFACE\r(.*)/,/^!/' "$SWITCH_PATH" | awk '/rate-limit/{print $4}'`

I tried with every possible changing quote and double quote but still no luck. Can someone help me this?
 

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LEARN ABOUT LINUX

irsend

IRSEND(1)							   User Commands							 IRSEND(1)

NAME

       irsend - basic LIRC program to send infra-red commands

SYNOPSIS

       irsend [options] DIRECTIVE REMOTE CODE [CODE...]

DESCRIPTION

       Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such
       as TV boxes, HiFi sets, etc.

       DIRECTIVE can be:
	  SEND_ONCE	    - send CODE [CODE ...] once
	  SEND_START	    - start repeating CODE
	  SEND_STOP	    - stop repeating CODE
	  LIST		    - list configured remote items
	  SET_TRANSMITTERS  - set transmitters NUM [NUM ...]
	  SIMULATE	    - simulate IR event

       REMOTE is the name of a remote, as described in the lircd configuration file.

       CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file.

       NUM is the transmitter number of the hardware device.

       For the LIST DIRECTIVE, REMOTE and/or CODE can be empty:

	  LIST	 ""    ""   - list all configured remote names
	  LIST REMOTE  ""   - list all codes of REMOTE
	  LIST REMOTE CODE  - list only CODE of REMOTE

       The SIMULATE command only works if it has been explicitly enabled in lircd.

       -h --help
	      display usage summary

       -v --version
	      display version

       -d --device
	      use given lircd socket [/var/run/lirc/lircd]

       -a --address=host[:port]
	      connect to lircd at this address

       -# --count=n
	      send command n times

EXAMPLES

	  irsend LIST DenonTuner ""
	  irsend SEND_ONCE  DenonTuner PROG-SCAN
	  irsend SEND_ONCE  OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP
	  irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3
	  irsend SEND_STOP  OnkyoAmpli VOL-DOWN
	  irsend SET_TRANSMITTERS 1
	  irsend SET_TRANSMITTERS 1 3 4
	  irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S"

FILES

       /etc/lirc/lircd.conf
	      Default lircd configuration file.  It should contain all the remotes, their infra-red codes and the corresponding timing	and  wave-
	      form details.

DIAGNOSTICS

       If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics:
       "irsend: could not connect to socket"
       "irsend: Connection refused" (or "Permission denied").

SEE ALSO

       The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory.

       lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org.

irsend 0.9.0-pre1						   October 2010 							 IRSEND(1)
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