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Full Discussion: Eval and get awk output assigned to variable
Top Forums Shell Programming and Scripting Eval and get awk output assigned to variable Post 302945420 by bakunin on Friday 29th of May 2015 06:29:34 AM
Old 05-29-2015
Quote:
Originally Posted by ezee
Code:
eval "ade desc ${filename}@@/<branch_name> | grep Version | awk '{print $2}' 2>&1 1>/dev/null"
ret=$?

I can only emphasize what RudiC has said. Generally speaking: if you ever write a line with awk and grep ending in the same pipeline you are doing something wrong. In your case

Code:
... | awk '/Version/ {print $2}' | ....

will do the same as

Code:
... | grep "Version" | awk '{print $2}' | ....

Furthermore, the eval should only be used as a very last measure. In 99% of the time it is better to avoid it. I can't even see what the purpose of it should be in your case. Care to explain what, in fact, you are trying to do (the big picture, not the syntactical problem you had)?

I hope this helps.

bakunin
 

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LEARN ABOUT POSIX

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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