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Full Discussion: understanding the purpose of <If env | grep -q $EXAMPLE>
Top Forums Shell Programming and Scripting understanding the purpose of <If env | grep -q $EXAMPLE> Post 303041883 by RudiC on Thursday 5th of December 2019 05:04:35 PM
Old 12-05-2019
Please become accustomed to supplying decent and sufficient information whereupon an analysis can be started. Like contents of the EXAMPLE variable, the (meaningful) code around that if construct, your OS and shell versions.
None of your conclusions above can be acknowledged nor disproved due to lack of info. The construct you show checks the process environment to see if it contains the string which is the expanded value of EXAMPLE, be it (part of) a variable name or an assignment string.
Last edited by RudiC; 12-09-2019 at 06:33 AM..
This User Gave Thanks to RudiC For This Post:
croyleje
 

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LEARN ABOUT XFREE86

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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