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Top Forums UNIX for Beginners Questions & Answers Shell Script behaviour and syntax Post 303045796 by Cybora on Monday 13th of April 2020 03:45:46 PM
Old 04-13-2020
Shell Script behaviour and syntax

Here are the 3 scripts(FirstScrpt.sh,firstcallScrpt.sh,startProcess.sh) that were running in the server for the past several years.
I understand the way it is written is that for every 1 hour 'firstcallScript.sh' is being called in that it kills the pid of 'startProcess.sh'
and starts again.

2 things I noticed
1. Value of pid.txt never changes if it is being is killed and created every hour.
2. It never runs in the background even when it is run with '&' like (./FirstScrpt.sh &)

FirstScrpt.sh
Code:
#!/bin/bash

if [ $# -ne 1 ]
then
	echo "Usage:  $0 test|prod"
	exit 1
fi
envRun=$1

  echo "Level is :  ${envRun}"
	while [ 1 ]
	do
	cat pid.txt | xargs -l1 kill
	./firstcallScript.sh ${envRun}
	sleep 3600
	done

firstCallScript.sh
Code:
#!/bin/bash

if [ $# -ne 1 ]
then
	echo "Usage:  $0 test|prod"
	exit 1
fi
envRun=$1

if [ $envRun = "test" ] 
then
  echo "Level is  :  ${envRun}"
     ./startProcess.sh ${envRun}
   
 else
   echo "Level is test Invoke test script :  ${envRun}"
   	./startProcess.sh ${envRun}
	
fi

startProcess.sh

Code:
#!/bin/bash 
envRun=$1
echo "${envRun}"
echo "I'm a Linux user."
echo $! > pid.txt


Last edited by Cybora; 04-13-2020 at 04:53 PM.. Reason: Edited the firstScript for 1 hour of sleep
 

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MSSQL_NUM_FIELDS(3)													       MSSQL_NUM_FIELDS(3)

mssql_num_fields - Gets the number of fields in result

SYNOPSIS
int mssql_num_fields (resource $result) DESCRIPTION
mssql_num_fields(3) returns the number of fields in a result set. PARAMETERS
o $result - The result resource that is being evaluated. This result comes from a call to mssql_query(3). RETURN VALUES
Returns the number of fields, as an integer. EXAMPLES
Example #1 mssql_num_fields(3) example <?php // Connect to MSSQL and select the database $link = mssql_connect('KALLESPCSQLEXPRESS', 'sa', 'phpfi'); mssql_select_db('php', $link); // Select some data from our database $data = mssql_query('SELECT [name], [age] FROM [php].[dbo].[persons]'); // Construct a table echo '<table border="1">'; $header = false; // Iterate through returned results while ($row = mssql_fetch_array($data)) { // Build the table header if (!$header) { echo '<thead>'; echo '<tr>'; for ($i = 1; ($i + 1) <= mssql_num_fields($data); ++$i) { echo '<td>' . ucfirst($row[$i]) . '</td>'; } echo '</tr>'; echo '</thead>'; echo '<tbody>'; $header = true; } // Build the row echo '<tr>'; foreach($row as $value) { echo '<td>' . $value . '</td>'; } echo '</tr>'; } // Close table echo '</tbody>'; echo '</table>'; // Clean up mssql_free_result($data); mssql_close($link); ?> SEE ALSO
mssql_query(3), mssql_fetch_field(3), mssql_num_rows(3). PHP Documentation Group MSSQL_NUM_FIELDS(3)
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