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Full Discussion: Problem evaluating condition
Top Forums Shell Programming and Scripting Problem evaluating condition Post 303011951 by RudiC on Friday 26th of January 2018 11:06:00 AM
Old 01-26-2018
I'm afraid that using the result of a "command substitution" for an if condition is not too good an idea, as the shell it will try to run the result line as a command which will most probably fail.
What makes me somewhat hesitant is that
Code:
ps -ef|grep pmon_$ORACLE_SID|grep -v grep

doesn't seem to produce a result as can be seen in the output in lines 8 and 9. grep not producing an output line - and be it through the -v option - will yield the exit code 1 which is interpreted as FALSE.
Please show the result of the command
Code:
ps -ef|grep pmon_$ORACLE_SID

in your function. Is it possible the $ORACLE_SID has non-printing control chars in it?
 

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LEARN ABOUT PHP

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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