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Top Forums Shell Programming and Scripting Control structures and scripting question.. Post 302369459 by SlapnutsGT on Sunday 8th of November 2009 05:28:53 PM
Old 11-08-2009
Control structures and scripting question..

Hey guys, I'm currently working on a project for comp sci course, and I'm very green to Unix and scripting, and only have a semesters worth of programming knowledge (bare with me! sorry!). What I'm trying to do is make a 'if ... then ... fi' control structure that takes user input and then searches the file where data is going and if the name already exists in first field it prints error msg (cant have two of same name in data file)

So basically its sort a mock inventory auto parts management script, user goes to add new parts, first is prompted to enter name of part ... I then want to compare user input to first field of all entires already in my data file (auto.parts) ... if the part exists print error message, if not continue and add part to data file.

So far I got:
Code:
#bin/sh

echo -n "Please enter auto part name:"
read apname
if [ "$apname" = "$1" ]
then
        echo -n "Part already exists!  Can not enter duplicate parts."
        stop=1
else
        echo -n "Please enter operator's name:"
        read opname
        status="Part Available"
        cdate=""
        bname=""
fi
echo ${apname}:${opname}:${status}:${cdate}:${bname} >> auto.parts
echo "A new auto part has been added to inventory!"

It seems to not be comparing the user input to first field (first field is where auto part name goes i.e <partname>:<stuff>:<stuff>:<etc..>), it just ignores the statement and continues on ... allowing me to enter 100 Brake:etc:etc:etc lines if I wish too, which it shouldn't!. I'm almost positive i'm using wrong syntax in my if [statement]. ANY help, or finger pointing me to a great website for beginners would be MUCH appreciated!!

Thanks guys!
 

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OCI_FIELD_SIZE(3)														 OCI_FIELD_SIZE(3)

oci_field_size - Returns field's size

SYNOPSIS
int oci_field_size (resource $statement, mixed $field) DESCRIPTION
Returns the size of a $field. PARAMETERS
o $statement - A valid OCI statement identifier. o $field - Can be the field's index (1-based) or name. RETURN VALUES
Returns the size of a $field in bytes, or FALSE on errors. EXAMPLES
Example #1 oci_field_size(3) example <?php // Create the table with: // CREATE TABLE mytab (number_col NUMBER, varchar2_col varchar2(1), // clob_col CLOB, date_col DATE); $conn = oci_connect("hr", "hrpwd", "localhost/XE"); if (!$conn) { $m = oci_error(); trigger_error(htmlentities($m['message']), E_USER_ERROR); } $stid = oci_parse($conn, "SELECT * FROM mytab"); oci_execute($stid, OCI_DESCRIBE_ONLY); // Use OCI_DESCRIBE_ONLY if not fetching rows echo "<table border="1"> "; echo "<tr>"; echo "<th>Name</th>"; echo "<th>Type</th>"; echo "<th>Length</th>"; echo "</tr> "; $ncols = oci_num_fields($stid); for ($i = 1; $i <= $ncols; $i++) { $column_name = oci_field_name($stid, $i); $column_type = oci_field_type($stid, $i); $column_size = oci_field_size($stid, $i); echo "<tr>"; echo "<td>$column_name</td>"; echo "<td>$column_type</td>"; echo "<td>$column_size</td>"; echo "</tr> "; } echo "</table> "; // Outputs: // Name Type Length // NUMBER_COL NUMBER 22 // VARCHAR2_COL VARCHAR2 1 // CLOB_COL CLOB 4000 // DATE_COL DATE 7 oci_free_statement($stid); oci_close($conn); ?> NOTES
Note In PHP versions before 5.0.0 you must use ocicolumnsize(3) instead. This name still can be used, it was left as alias of oci_field_size(3) for downwards compatability. This, however, is deprecated and not recommended. SEE ALSO
oci_num_fields(3), oci_field_name(3). PHP Documentation Group OCI_FIELD_SIZE(3)
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