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Full Discussion: Using grep returns partial matches, I need to get an exact match or nothing
Top Forums Shell Programming and Scripting Using grep returns partial matches, I need to get an exact match or nothing Post 302490620 by ec01 on Tuesday 25th of January 2011 10:01:31 AM
Old 01-25-2011
alternative solution using awk and/or nawk to match the exact zoneName:
Code:
# cat /var/tmp/zoneadm.out.test
  ID NAME             STATUS     PATH                           BRAND    IP
   0 global           running    /                              native   shared
   1 myzone1          running    /zones/myzone1                 native   shared
   2 myzone1-old      running    /zones/myzone1-old             native   shared
   4 myzone2          running    /zones/myzone2                 native   shared
   5 myzone2-old      running    /zones/myzone2-old             native   shared
   6 myzone2-another  running    /zones/myzone2-another         native   shared
   7 myzone2-junk     running    /zones/myzone2-junk            native   shared
# zoneName=myzone2
# awk '$2 == "'$zoneName'"' /var/tmp/zoneadm.out.test
   4 myzone2          running    /zones/myzone2                 native   shared
# zoneName=myzone2-
# awk '$2 == "'$zoneName'"' /var/tmp/zoneadm.out.test  ### no match
# zoneName=myzone2-old
# awk '$2 == "'$zoneName'"' /var/tmp/zoneadm.out.test
   5 myzone2-old      running    /zones/myzone2-old             native   shared

(in your case you'd run zoneadm list -vic then pipe it to awk instead rather than using the file)

Be careful with the quotes for the shell variables (ie: quote as exactly as shown). nawk may be easier if the quotes are too hard to read:
Code:
# zoneName=myzone2
# nawk -v zonename=${zoneName} '$2 == zonename {print $2}' /var/tmp/zoneadm.out.test
myzone2

Last edited by ec01; 01-25-2011 at 11:01 AM.. Reason: fix code tags
This User Gave Thanks to ec01 For This Post:
TKD
 

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LEARN ABOUT LINUX

xzegrep

XZGREP(1)							     XZ Utils								 XZGREP(1)

NAME

       xzgrep - search compressed files for a regular expression

SYNOPSIS

       xzgrep [grep_options] [-e] pattern file...
       xzegrep ...
       xzfgrep ...
       lzgrep ...
       lzegrep ...
       lzfgrep ...

DESCRIPTION

       xzgrep  invokes	grep(1)  on  files  which may be either uncompressed or compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options
       specified are passed directly to grep(1).

       If no file is specified, then standard input is decompressed if necessary and fed to grep(1).  When reading from  standard  input,  gzip(1)
       and bzip2(1) compressed files are not supported.

       If  xzgrep  is  invoked as xzegrep or xzfgrep then egrep(1) or fgrep(1) is used instead of grep(1).  The same applies to names lzgrep, lze-
       grep, and lzfgrep, which are provided for backward compatibility with LZMA Utils.

ENVIRONMENT

       GREP   If the GREP environment variable is set, xzgrep uses it instead of grep(1), egrep(1), or fgrep(1).

SEE ALSO

       grep(1), xz(1), gzip(1), bzip2(1), zgrep(1)

Tukaani 							    2010-09-27								 XZGREP(1)
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