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Shell Programming and Scripting
Bourne Shell: Clean Display of stored procedure's output
Post 302185372 by totziens on Tuesday 15th of April 2008 12:17:58 AM
04-15-2008
In my environment, without the exec, the value stored in the variable assigned inside the while loop cannot be referred. In the code as follows, you'll get "123" instead of the value obtained from the SPOOL_FILE at the last echo statement. I have no idea why. I was struggling with this problem before discovering exec method.
CUR_MAX=123
# Reading the spool file to get stored procedure's returned values
exec 3<&0
exec 0<$SPOOL_FILE
while read line
do
echo $line
if [ "$line" = 'MAX_OUT' ]; then
read line
read line
CUR_MAX=$line
fi
done
exec 0<&3
echo "Current Max Value is " $CUR_MAX
Meanwhile, the suggestion to add "</dev/null 2>&1" in the following does not prevent print section from being displayed
$ORACLE_HOME/bin/sqlplus /NOLOG </dev/null 2>&1 @<<!
CUR_MAX=123
# Reading the spool file to get stored procedure's returned values
exec 3<&0
exec 0<$SPOOL_FILE
while read line
do
echo $line
if [ "$line" = 'MAX_OUT' ]; then
read line
read line
CUR_MAX=$line
fi
done
exec 0<&3
echo "Current Max Value is " $CUR_MAX
Meanwhile, the suggestion to add "</dev/null 2>&1" in the following does not prevent print section from being displayed
$ORACLE_HOME/bin/sqlplus /NOLOG </dev/null 2>&1 @<<!
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CPANPLUS::Shell(3) User Contributed Perl Documentation CPANPLUS::Shell(3) NAME
CPANPLUS::Shell - base class for CPANPLUS shells SYNOPSIS
use CPANPLUS::Shell; # load the shell indicated by your # config -- defaults to # CPANPLUS::Shell::Default use CPANPLUS::Shell qw[Classic] # load CPANPLUS::Shell::Classic; my $ui = CPANPLUS::Shell->new(); my $name = $ui->which; # Find out what shell you loaded $ui->shell; # run the ui shell DESCRIPTION
This module is the generic loading (and base class) for all "CPANPLUS" shells. Through this module you can load any installed "CPANPLUS" shell. Just about all the functionality is provided by the shell that you have loaded, and not by this class (which merely functions as a generic loading class), so please consult the documentation of your shell of choice. BUG REPORTS
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