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Top Forums Shell Programming and Scripting Handling null Integer/string variables Post 302604639 by lan123 on Monday 5th of March 2012 01:50:04 PM
Old 03-05-2012
Network Handling null Integer/string variables

I kind of found out the hard way that I am not able to manipulate the null value, the long silence that happens when there is no value returned.
I am looking for PIDs, and when there is no PID return, I wanted to handle this special scenario.

Here is my script.

Code:
#!/bin/bash
LAN_VARIABLE= echo `ps -ef | grep mintty | awk '{print $2}'`
echo $LAN_VARIABLE
if [[ $LAN_VARIABLE =~ ^[0-9]+$ ]]; then
        echo "An Integer"
else
        echo "not an integer"
fi

When there is no mintty process running, i wanted the else loop to be printed and when there is a pid , then the if part to be printed. But it always prints "not an integer", even though the echo $LAN_VARIABLE returns PID.

Last edited by joeyg; 03-05-2012 at 03:21 PM.. Reason: Please wrap scripts and data with CodeTags
 

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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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