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Top Forums Shell Programming and Scripting IF section problem. syntax error: unexpected end of file error Post 302911487 by clx on Friday 1st of August 2014 01:42:59 AM
Old 08-01-2014
Quote:
Code:
returned=`tail -50 SapLogs.log | grep -i "Error"`
echo $returned

and then checking whether "$returned" expands to an empty string.
What if we make use of grep's return value?

Code:
tail -50 SapLogs.log | grep -iq "Error"
if [ $? -eq 0 ]; then
  echo found error
else
 echo no error
fi

less code, avoid subshell invocation?
 

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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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