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Top Forums Shell Programming and Scripting variable inside variable inside loop headache Post 302326638 by hcclnoodles on Thursday 18th of June 2009 10:29:20 AM
Old 06-18-2009
variable inside variable inside loop headache

Hi Gurus

I have a file called /tmp/CMDB which looks like this

Code:
serial: 0623AN1208
hostname: server1
model: x4100
assetID: 1234

I am writing a for loop that will go through this file line by line creating a variable of itself. Using the first iteration of the loop (i.e. the first line) as an example, I want it to create a variable called

db_serial and populate it with value 0623AN1208

on the next iteration create a variable called

db_hostname and populate it with value server1

etc etc

so i have tried

Code:
cat /tmp/CMDB | while read n
do

VAR=db_`echo $n | cut -d: -f1`
VALUE=`echo $n | cut -d: -f2`

eval `echo $VAR`=`echo $VALUE`

done

# echo it all out after the loop has finished

echo "DB serial is set to $db_serial"
echo "DB hostname is set to $db_hostname"
echo "DB model is set to $db_model"
echo "DB Asset ID is set to $db_assetID"


Plus a whole load of other combinations and i just cant get the thing to work


Im sure the problem is with my use of the "eval" command which is effectively using another variable to create a variable, and assigning the value from another variable Smilie

does anybody know what im doing wrong ?Smilie
 

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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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