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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 HPUX

nljust

nljust(1)						      General Commands Manual							 nljust(1)

NAME

       nljust - justify lines, left or right, for printing

SYNOPSIS

       digits] seq] just] mode] order] margin] width] ck] [file ...]

DESCRIPTION

       formats	for printing data written in languages with a right-to-left orientation.  It is designed to be used with the and the commands (see
       pr(1) and lp(1)).

       reads the concatenation of input files (or standard input if none are given) and produces on standard output a right-to-left formatted ver-
       sion of its input.  If appears as an input file name, reads standard input at that point.  Use to delimit the end of options.

       formats	input  files for all languages that are read from right to left.  For languages that have a left-to-right orientation, the command
       merely copies input files to standard output.

   Options
       recognizes the following options:

	      Justify data for all languages,
			  including those having a left-to-right text orientation.  By default only right-to-left language data is justified.  For
			  all other languages, input files are directly copied to standard output.

	      Select enhanced printer shapes for some Arabic characters.
			  With this option, two-character combinations of laam and alif are replaced by a single character.

	      Triggers ISO 8859-6 interpretation of the data.

	      Processes digits for output as hindi, western, or both.
			  digits can be or both.

	      Use	  seq as the escape sequence to select the primary character set.  This escape sequence is used by languages that have too
			  many characters to be accommodated by ASCII in a single 256-character set.  In these cases, the seq escape sequence  can
			  be  used  to	select	the non-ASCII character set.  The escape character itself(0x1b) is not given on the command line.
			  Hewlett-Packard escape sequences are used by default.

	      If	  just is left justify print lines.  If just is right-justify print lines starting from the (designated or default)  print
			  width column.  The default is right justification.

	      Replace leading spaces with alternative spaces.
			  Some	right-to-left character sets have a non-ASCII or alternative space.  This option can be useful when filtering out-
			  put (see pr(1)).  With right justification, the option causes line numbers to be placed immediately to the right of  the
			  tab  character.  Without the option, right justification causes line numbers to be placed at the print-width column.	By
			  default, leading spaces are not replaced by alternative spaces.

	      Indicate	  mode of any file to be formatted.  Mode refers to the text orientation of the file when it  was  created.   If  mode	is
			  assume  Latin  mode.	 If  mode is assume non-Latin mode.  By default, mode information is obtained from the environment
			  variable.

	      Do not terminate lines containing printable characters with a new-line.
			  By default, print lines are terminated by new-lines.

	      Indicate data
			  order of any file to be formatted.  The text orientation of a file can affect the way its data is arranged.  If order is
			  assume keyboard order.  If order is assume screen order.  By default, order information is obtained from the environment
			  variable.

	      Truncate print lines
			  that do not fit the designated or default line length.  Print lines are folded  (that  is,  wrapped  to  next  line)	by
			  default.

	      Expand input tabs to column positions
			  k+1,	2*k+1, 3*k+1, etc.  Tab characters in the input are expanded to the appropriate number of spaces.  If k is 0 or is
			  omitted, default tab settings at every eighth position is assumed.  If cd (any non-digit  character)	is  given,  it	is
			  treated  as  the  input tab character.  The default for c is the tab character.  always expands input tabs.  This option
			  provides a way to change the tab character and setting.  If this option is specified, at least one of the  parameters  c
			  or k must be given.

	      Designate a number as the print
			  margin.   The  print margin is the column where truncation or folding takes place.  The print margin determines how many
			  characters appear on a single line and can never exceed the print width.  The print margin is relative to the justifica-
			  tion.   If the print margin is 80, folding or truncation occurs at column 80 starting from the right during a right jus-
			  tification.  Similarly, folding or truncation occurs at column 80 starting from the left during  a  left  justification.
			  By default, the print margin is set to column 80.

	      Designates a number as the print
			  width.   The	print  width is the maximum number of columns in the print line.  Print width determines the start of text
			  during a right justification.  The larger the print width, the further to the right the text will start.  By default, an
			  80-column print width is used.

EXTERNAL INFLUENCES

   Environment Variables
       The  environment  variable  determines the mode and order of the file.  The syntax of is [mode][_order].  mode describes the mode of a file
       where represents Latin mode and represents non-Latin mode.  Non-Latin mode is assumed for values other than and order  describes  the  data
       order  of a file where is keyboard and is screen.  Keyboard order is assumed for values other than and Mode and order information in can be
       overridden from the command line.

       The environment variable determines the direction of a language (left-to-right or right-to-left) and whether context analysis of characters
       is necessary.

       The environment variable determines whether a language has alternative numbers.

       The environment variable determines the language in which messages are displayed.

   International Code Set Support
       Single-byte character code sets are supported.

EXAMPLES

       Right justify on a 132-column printer with a print margin at column 80 (the default):

       Right justify output of with line numbers on a 132-column printer with a print margin at column 132:

WARNINGS

       If with line numbers option) is piped to the separator character must be a tab(0x09).

       It is the user's responsibility to ensure that the environment variable accurately reflects the status of the file.

       Mode  and  justification must be consistent.  Only non-Latin-mode files can be right justified in a meaningful way.  Similarly, only Latin-
       mode files can be safely left justified.  If mode and justification do not match, the results are undefined.

       If present, alternative numbers always have a left-to-right orientation.

       The command is HP proprietary, not portable to other vendors' systems, and will not be provided in future HP-UX releases.

AUTHOR

       was developed by HP.

SEE ALSO

       forder(1), lp(1), pr(1), strord(3C).

																	 nljust(1)
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