Perl Script execution causes system panic

Hi All,
I'm using a Perl script of my own for work purpose.The script was running fine yesterday,until today morning I have updated the XCode to 4.6.2.
Everytime I execute the script,my computer turns off and resatarts with system panic.
Here are the error report content.
Interval Since Last Panic Report: 974 sec
Panics Since Last Report:          3
Anonymous UUID:                    AE85B099-0AAA-B563-0607-3EFA733CAEDF
Thu Apr 18 15:08:18 2013
panic(cpu 0 caller 0xffffff8018d1edba): "negative open count (c, 16, 2)"@/SourceCache/xnu/xnu-2050.22.13/bsd/miscfs/specfs/spec_vnops.c:1813
Backtrace (CPU 0), Frame : Return Address
0xffffff80b3db3c20 : 0xffffff8018c1d626
0xffffff80b3db3c90 : 0xffffff8018d1edba
0xffffff80b3db3cd0 : 0xffffff8018d23c46
0xffffff80b3db3d20 : 0xffffff8018d10cb6
0xffffff80b3db3d60 : 0xffffff8018cf08a1
0xffffff80b3db3db0 : 0xffffff8018cf0021
0xffffff80b3db3df0 : 0xffffff8018cf0b9e
0xffffff80b3db3e20 : 0xffffff8018d1100f
0xffffff80b3db3e50 : 0xffffff8018f55b8d
0xffffff80b3db3ec0 : 0xffffff8018c39ce9
0xffffff80b3db3ef0 : 0xffffff8018c3c7e8
0xffffff80b3db3f20 : 0xffffff8018c3c65e
0xffffff80b3db3f50 : 0xffffff8018c1b70d
0xffffff80b3db3f90 : 0xffffff8018cb84a3
0xffffff80b3db3fb0 : 0xffffff8018ccd4ac
BSD process name corresponding to current thread: ssh
Mac OS version:
12D78
Kernel version:
Darwin Kernel Version 12.3.0: Sun Jan 6 22:37:10 PST 2013; root:xnu-2050.22.13~1/RELEASE_X86_64
Kernel UUID: 3EB7D8A7-C2D3-32EC-80F4-AB37D61492C6
Kernel slide:     0x0000000018a00000
Kernel text base: 0xffffff8018c00000
System model name: MacBookPro4,1 (Mac-F42C89C8)
System uptime in nanoseconds: 1213636802424
last loaded kext at 70392580239: com.apple.filesystems.smbfs          1.8 (addr 0xffffff7f9ae0b000, size 229376)
last unloaded kext at 168892078080: com.apple.iokit.IOSCSIBlockCommandsDevice          3.5.5 (addr 0xffffff7f992ca000, size 90112)
loaded kexts:
foo.tun          1.0
foo.tap          1.0
com.apple.filesystems.smbfs          1.8
com.apple.driver.AppleBluetoothMultitouch          75.19
com.apple.driver.AppleHWSensor          1.9.5d0
com.apple.filesystems.autofs          3.0
com.apple.driver.DiskImages.ReadWriteDiskImage          345
com.apple.driver.DiskImages.RAMBackingStore          345
com.apple.driver.AudioAUUC          1.60
com.apple.driver.IOBluetoothSCOAudioDriver          4.1.3f3
com.apple.iokit.IOBluetoothSerialManager          4.1.3f3
com.apple.driver.AppleHDA          2.3.7fc4
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.1.3f3
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.ApplePolicyControl          3.3.0
com.apple.driver.AppleLPC          1.6.0
com.apple.driver.AppleUpstreamUserClient          3.5.10
com.apple.driver.AppleSMCPDRC          1.0.0
com.apple.driver.AppleSMCLMU          2.0.3d0
com.apple.GeForce          8.1.0
com.apple.driver.AppleBacklight          170.2.5
com.apple.driver.AppleMCCSControl          1.1.11
com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
com.apple.driver.SMCMotionSensor          3.0.3d1
com.apple.driver.AppleUSBTCButtons          237.1
com.apple.driver.AppleUSBTCKeyboard          237.1
com.apple.driver.AppleIRController          320.15
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          34
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCIBlockStorage          2.3.1
com.apple.driver.AppleIntelPIIXATA          2.5.1
com.apple.driver.AppleAHCIPort          2.5.1
com.apple.driver.AppleSmartBatteryManager          161.0.0
com.apple.driver.AppleUSBHub          5.5.5
com.apple.driver.AirPortBrcm43224          600.36.17
com.apple.driver.AppleFWOHCI          4.9.6
com.apple.iokit.AppleYukon2          3.2.3b1
com.apple.driver.AppleUSBEHCI          5.5.0
com.apple.driver.AppleUSBUHCI          5.2.5
com.apple.driver.AppleEFINVRAM          1.7
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleHPET          1.8
com.apple.driver.AppleACPIButtons          1.7
com.apple.driver.AppleSMBIOS          1.9
com.apple.driver.AppleACPIEC          1.7
com.apple.driver.AppleAPIC          1.6
com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0
com.apple.nke.applicationfirewall          4.0.39
com.apple.security.quarantine          2
com.apple.driver.AppleIntelCPUPowerManagement          196.0.0
com.apple.driver.IOBluetoothHIDDriver          4.1.3f3
com.apple.driver.AppleMultitouchDriver          235.29
com.apple.kext.triggers          1.0
com.apple.driver.DiskImages.KernelBacked          345
com.apple.iokit.IOSerialFamily          10.0.6
com.apple.driver.DspFuncLib          2.3.7fc4
com.apple.iokit.IOAudioFamily          1.8.9fc11
com.apple.kext.OSvKernDSPLib          1.6
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.1.3f3
com.apple.driver.AppleHDAController          2.3.7fc4
com.apple.iokit.IOHDAFamily          2.3.7fc4
com.apple.iokit.IOSurface          86.0.4
com.apple.iokit.IOBluetoothFamily          4.1.3f3
com.apple.iokit.IOFireWireIP          2.2.5
com.apple.driver.AppleGraphicsControl          3.3.0
com.apple.driver.AppleBacklightExpert          1.0.4
com.apple.driver.AppleSMBusController          1.0.11d0
com.apple.driver.IOPlatformPluginLegacy          1.0.0
com.apple.driver.IOPlatformPluginFamily          5.3.0d51
com.apple.nvidia.nv50hal          8.1.0
com.apple.NVDAResman          8.1.0
com.apple.iokit.IONDRVSupport          2.3.7
com.apple.iokit.IOGraphicsFamily          2.3.7
com.apple.driver.AppleSMC          3.1.4d2
com.apple.driver.AppleUSBMultitouch          237.3
com.apple.iokit.IOUSBHIDDriver          5.2.5
com.apple.driver.AppleUSBMergeNub          5.5.5
com.apple.driver.AppleUSBComposite          5.2.5
com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.5
com.apple.iokit.IOATABlockStorage          3.0.2
com.apple.iokit.IOATAFamily          2.5.1
com.apple.iokit.IOAHCIFamily          2.3.1
com.apple.iokit.IOUSBUserClient          5.5.5
com.apple.iokit.IO80211Family          522.4
com.apple.iokit.IOFireWireFamily          4.5.5
com.apple.iokit.IONetworkingFamily          3.0
com.apple.iokit.IOUSBFamily          5.5.5
com.apple.driver.AppleEFIRuntime          1.7
com.apple.iokit.IOHIDFamily          1.8.1
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          220.2
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          345
com.apple.iokit.IOStorageFamily          1.8
com.apple.driver.AppleKeyStore          28.21
com.apple.driver.AppleACPIPlatform          1.7
com.apple.iokit.IOPCIFamily          2.7.3
com.apple.iokit.IOACPIFamily          1.4
com.apple.kec.corecrypto          1.0
Model: MacBookPro4,1, BootROM MBP41.00C1.B03, 2 processors, Intel Core 2 Duo, 2.4 GHz, 5 GB, SMC 1.27f3
Graphics: NVIDIA GeForce 8600M GT, GeForce 8600M GT, PCIe, 256 MB
Memory Module: BANK 0/DIMM0, 1 GB, DDR2 SDRAM, 667 MHz, 0xCE00000000000000, 0x4D342037305432393533455A332D43453620
Memory Module: BANK 1/DIMM1, 4 GB, DDR2 SDRAM, 667 MHz, 0x2C00000000000000, 0x3136485453353132363448592D3636374131
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8C), Broadcom BCM43xx 1.0 (5.10.131.36.16)
Bluetooth: Version 4.1.3f3 11349, 2 service, 18 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: KINGSTON SV300S37A120G, 120.03 GB
Parallel ATA Device: ST9500420AS, 500.11 GB
USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0xfd400000 / 2
USB Device: USB Receiver, 0x046d (Logitech Inc.), 0xc52b, 0x1a200000 / 3
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x1a100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x820f, 0x1a110000 / 4
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0230, 0x5d200000 / 3
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x5d100000 / 2
I can't currently use my script because of this and it is very crucial for me.
Anyone has any idea why this is happening?
Thanks in advance!

rsonnens wrote:
Etresoft, Yes you are correct I did post the same link. Sorry that I did not notice it. However, as Gajillion also noted in his post, it is a kernel timing/race condition bug and NOT a 3rd party extension bug and can only be fixed by Apple. There is nothing someone can practically do to workaround the issue.
My suggestion for everyone having this issue is to entering a case into Apple's bug tracking system, and every time you get the error also be sure that you allow the reporter app to send the info to Apple.
No one is having this issue. The only people who have reported it have extensive 3rd party software installations. I have never seen a Perl-induced kernel panic on my Mac and I do some really crazy things with Perl - SOAP servers routed through launcd with my own transport protocols. No panics.
You are free to send in any panic or bug reports to Apple, should they arise. But I am quite confident that anyone encoutering such a problem really can't be said to be running OS X anymore. Once you make that many modifications, it is some hybrid Linux-style monster. And yes, such things panic if you look at them the wrong way - just like Linux.

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It should work now,
Regards,
T.Raghulan

Best method for timestamping? (for later use with perl script)

What is the best method that I can use to timestamp events in Linux for later use with perl script?
I am performing some energy measurements.. where I am running several tasks separated by 20 secs in between. Before I start any execution of tasks, I always place initial delay for me to start the script and start the measurement device.
My problem is that I don't know how long is that first delay exactly. So to solve this, I thought I could use date commands to time stamp all tasks.. or at least to timestamp first dela.
Here is example of what I am doing:
1st delay
task 1
20s
task 2
20s
task 3..... etc
What would be the best to use?

logger.
It posts messages straight to the system log. You can see the message, in all its glory using tools like journalctl. You will see the message, the date, time, host name, user name, and the PID of logger when it ran.

PERL script on Solaris

My ISP is running on solaris. I have place a PERL (.pl) script which will fire a mail. He says 'Sendmail' is configured and I can create any folder and place my script and system will recognize is automatically. As we know, all the web servers will have 'cgi-bin' directory where the .pl or .cgi files will be placed for execution. My ISP tells me that he has configured the server in such a way that I can create a 'cgi' directory anywhere and can run it from the browser. I am unable to do it. Tell me how I can do it.

Unfortunately this stupid perl script isn't that
easy. It uses Rational cqperl, then some libraries
and modules I don't understand. I can't even find
the actual code it uses that uses flexlm.
That's why I was asking what is different with java
1.2 and java 1.4. Is there some way that Runtime
acts differently?Not in any fundamental way that I am aware of.
The fact that the script is running at all though tells me that the problem is on the PERL side of things. I suspect that some of those modules and libraries are not being loaded correctly or the same way on both systems.
I fear the answer is that you need to figure out what components the script needs to run and make sure that it has them under all circumstances. This is like a classpath problem except it is with your PERL script so you need to solve it as a PERL problem.
Again if it wasn't running at all that would be one concern but it is running just not finding all it's bits.. a problem of that nature strongly indicates that the issue is happening once the process has already been spawned (correctly) and so is out of the realm of the Java part of your program.

Calling perl script from java ---help needed

I haven't been doing a lot with java lately and i'm building an app with netbeans and having some difficulty with my button calling an outside perl script I'm pasting the code and error below...any help would be greatly appreciated. It's running on fedora 9 pretty much default install...
thanks.
code:
Runtime r = Runtime.getRuntime();
Process p = null;
String s = null;
String cmd123[] = { "perl /home/deaddev/test1.pl" };
try {
p = r.exec(cmd123);
catch {
foo bar/etc/etc
error:
Oct 12, 2008 4:09:37 PM photomainmgr readToPerlActionPerformed
SEVERE: null
java.io.IOException: Cannot run program "perl /home/deaddev/test1.pl": java.io.IOException: error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:474)
at java.lang.Runtime.exec(Runtime.java:610)
at java.lang.Runtime.exec(Runtime.java:483)
at photomainmgr.readToPerlActionPerformed(photomainmgr.java:117)
at photomainmgr.access$000(photomainmgr.java:21)
at photomainmgr$1.actionPerformed(photomainmgr.java:54)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2012)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2335)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:404)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:253)
at java.awt.Component.processMouseEvent(Component.java:6101)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3276)
at java.awt.Component.processEvent(Component.java:5866)
at java.awt.Container.processEvent(Container.java:2105)
at java.awt.Component.dispatchEventImpl(Component.java:4462)
at java.awt.Container.dispatchEventImpl(Container.java:2163)
at java.awt.Component.dispatchEvent(Component.java:4288)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4461)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4125)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4055)
at java.awt.Container.dispatchEventImpl(Container.java:2149)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4288)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:604)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)
Caused by: java.io.IOException: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.<init>(UNIXProcess.java:164)
at java.lang.ProcessImpl.start(ProcessImpl.java:81)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:467)
... 30 more
error executing perl /home/deaddev/test1.pl

jschell wrote:
sabre150 wrote:
As and alternative you can useString cmd123 = "perl /home/deaddev/test1.pl";Using the single string approach YOU have to do any quoting so with this line no quoting takes place and the script /home/deaddev/test1.pl will be executed.Although that should be true apparently it isn't. I have just run
Process p = Runtime.getRuntime().exec("perl /home/sabre/work/dev/perl/xxx.pl");
new Thread(new SyncPipe(p.getErrorStream(), System.err)).start();
new SyncPipe(p.getInputStream(), System.out).run();
int returnCode = p.waitFor();
System.out.println("Return code = " + returnCode);which correctly executes the perl script xxx.pl.
P.S. SyncPipe is a Runnable that copies an InputStream to an OutputStream.
Edited by: sabre150 on Oct 14, 2008 9:19 AM
Interesting! Even though Runtime.exec() works with a single String, ProcessBuilder fails with this approach! You have to split the argument string. This certainly looks like a bug! Some while ago I looked at the source for Runtime.exec() to look at the differences between Runtime.exec() and ProcessBuilder and found that behind the scenes Runtime.exec() uses ProcessBuilder.
More research is required.

Execute a shell or perl script

Is it possible to execute a unix(solaris) shell script or perl script from a stored procedure. If so, a short example would be great.
Thanks,
John

External Procedure Source Code
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void sh(char *);
void sh( char *cmd )
int num;
num = system(cmd);
Issue the following commands to compile the code and generate the shared
object in Solaris:
cc -G -c shell.c
ld -r -o shell.so shell.o
You can also use the demo_rdbms.mk makefile to build shared libraries for use in external procedures. Using this method insulates you from any Operating System specific dependencies (e.g., which flags to use
for ld).
For example:
In 8.0.X,
$ make -f demo_rdbms.mk extproc_nocallback \
SHARED_LIBNAME=shell.so OBJS=shell.o
In 8.1.X,
$ make -f demo_rdbms.mk extproc_no_context \
SHARED_LIBNAME=shell.so OBJS=shell.o
Library Definition
CREATE LIBRARY shell_lib is '/u11/home/lsupport/proc/shell.so';
Note: The directory in quotes is the current of location of the library that
was created in the steps above.
PL/SQL Wrapper Procedure
create or replace procedure shell(cmd IN char)
as external
name "sh"
library shell_lib
language C
parameters (cmd string);
Execution
SQL> exec shell('ls');
cli.trc exe_prba.sql prueba.mk shell.c.old
core listener.old prueba.o shell.o
dec2bin.c listener.ora prueba.so shell.so
dec2bin.c.old nena.lst prueba.sql shell.sql
dec2bin.o p.sql sal.1 shell.sql.old
dec2bin.so pepito.lst sal.2 sqlnet.log
dec2bin.sql prb sal.3 tnsnames.ora
dec2bin.sql.old prb.c salida.lst tnsnames.ora.old
envoltorio.sql prueba.c shell.c uno.sql
PL/SQL procedure successfully completed.

Folder Action to Launch Perl Script

Hello.
I wrote a perl script which I wanted to execute when a file was dropped into a folder. I added a folder action with a very simple applescript:
on adding folder items to this_folder after receiving added_items
do shell script ¬
("perl /Users/Alexander/Library/Scripts/gte2.pl")
end adding folder items to
The folder action didn't do anything, any thoughts on what I'm doing wrong? Note, the perl script works fine when I run it from the terminal.
thanks.

Thanks Camelot, I appreciate the help. My script below is trying to read data from a file in folder in my system. So I will try your suggestion, I didn't realize the environment and path my be different.
Regards Alex
#!/usr/bin/perl -w
#This program is to convert files from gamin running GPS watch to text file which can be loaded into excel.
# To make executable, remember to set: chmod u+x <file>
#set all the flags. Note the flags are used to stop the matching
$i = 1; $k = 0; $start = "no";
#Open data file and find values
open(DATA,"/Users/Alexander/Alex's Misc/Health/Garmin_Conversion/run.tcx") || die "Couldn't open file*\n";
#read in the data line by line until "end of file"
while (<DATA>){
#start parsing for information to keep
if (/.<Id>./) {
@Idline=split(/>/);
@Idbeat=split(/T/,$Idline[1]);
$Id=$Idbeat[0];
if (/.<Track>./){
$start = "yes";
if ($start eq "yes"){
if (/.<Time>./) {
@timeline=split(/T/);
@timebeat=split(/Z/,$timeline[2]);
$Time[$i]=$timebeat[0];
elsif (/.<LatitudeDegrees>./) {
@HRline=split(/>/);
@HRbeat=split(/</,$HRline[1]);
$Latitude[$i]=$latbeat[0];
elsif (/.<LongitudeDegrees>./) {
@longline=split(/>/);
@longbeat=split(/</,$longline[1]);
$Longitude[$i]=$longbeat[0];
elsif (/.<AltitudeMeters>./) {
@altline=split(/>/);
@altbeat=split(/</,$altline[1]);
$Altitude[$i]=$altbeat[0];
elsif (/.<DistanceMeters>./) {
@distline=split(/>/);
@distbeat=split(/</,$distline[1]);
$Distance[$i]=$distbeat[0];
elsif (/.<Value>./) {
@HRline=split(/>/);
@HRbeat=split(/</,$HRline[1]);
$HR[$i]=$HRbeat[0];
$i++;
} #string matching
} #if start flag is yes
} #while data loop
close (DATA) || die "couldn't close file.\n";
#write all data to file in space delimited format
open (NEWFILE, ">/Users/Alexander/Alex's Misc/Health/Garmin_Converted/$Id run") || die "can't create file.\n";
$Time[0]="Time"; $Latitude[0]="Latitude"; $Longitude[0]="Longitude"; $Altitude[0]="Altitude"; $Distance[0]="Distance"; $HR[0]="HR";
print NEWFILE "0 $Time[0] $Latitude[0] $Longitude[0] $Altitude[0] $Distance[0] $HR[0]\n";
for ($j = 1; $j <= $i; $j++) {
$k=$j+1;
print NEWFILE "$j $Time[$j] $Latitude[$j] $Longitude[$j] $Altitude[$j] $Distance[$j] $HR[$j]\n";
} #for j loop
close (NEWFILE) || die "couldn't close newfile.\n";
#This is the end of the program

Runtime.exec("Perl Script writing and reading on I/O"), handling Streams

Hi all !!
In a first place : sorry for my english if it's not really understandable but I try to do as good as possible !
I'm writing a GUI with Swing that will allow (in one of my multiple tables) the user to run a Perl Script.
This Perl Script ask the user to choose a Folder ... then read all the files in this folder and for each file (xml File), extract the datas and put them in a database. But when a file that has to be inserted in the database contains this line : <Template_Used name="ST1.mtt"> and if the Template table in my database doesn't have the "ST1.mtt" stored ... the Perl Script ask to the user to give him the path of the file "ST1.mtt" so that the script can put the "ST1.mtt template" datas in the database.
This script runs well when it is from a windows console.
But I need a graphic interface !!!
So I created a JButton "Process a folder".
When the button is pressed, a JFileChooser appears and ask the user which Folder has to be processed.
Then a Process is created with the command : ("cmd.exe /C \"C:\\Program Files\\Fluke\\Ansur\\ProcessFolder.bat\").
The BatFile :
{code}cd C:\Documents and Settings\tsd\Desktop\Gael-Project\Project_Files
perl Process.pl
exit{code}
At this moment everything is working well.
But my Process.pl (which is 300 lines long ... and that you don't even want to hear about), ask in a first time the Path of the folder to process and sometimes ask the path to a file (a template file).
So I need to read and wirte on the STDIN/STDOUT during the exec of the Process.
In order to handle this I created two different threads : one reading the Process.getInputStream with a BufferedReader and one other writing on the Process.getOutputStream with a PrintWrinter.
What I need to do is :
When I read a line from the InputStream saying "I need the path of the ST1.mtt file", I should run a JFileChooser ... the user find the file in the computer ... and I write in the OutputStream the path of the file, so that my Perl Script doesn't have un Unitialised value on <STDIN> and can continue to process !!
I'm pretty sure it's possible ... because at the moment I just used a trick :
When the user push the "process a folder" button, I write the paths in the OutputStream before than the script needs it and it works !
But I need to write in the OutputStream only when it is time !!!
Any idea ??
Here are some parts of my code :
{code}
String filename = File.separator+"tmp";
          JFileChooser fc = new JFileChooser(new File(filename));
          fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY );
          // Show open dialog; this method does not return until the dialog is closed
     fc.showOpenDialog(null);
     Folder = fc.getSelectedFile();
          new GoodExec(cmd);
{code}
{code}
public class GoodExec {
     public static Process proc;
     public static StreamGobbler errorGobbler;
     public static StreamGobbler inputGobbler;
     public static StreamGobbler outputGobbler;
     public GoodExec(String cmd)
     try
               Runtime rt = Runtime.getRuntime();
          proc = rt.exec(cmd);
     // any error message?
     errorGobbler = new
     StreamGobbler(proc.getErrorStream(), "ERROR");
     // any input?
     inputGobbler = new
     StreamGobbler(proc.getInputStream(), "INPUT");
     // any output?
          outputGobbler = new
          StreamGobbler(proc.getOutputStream(), "OUTPUT");
     // kick them off
     errorGobbler.start();
     inputGobbler.start();
     outputGobbler.start();
     // any error???
     int exitVal = proc.waitFor();
     System.out.println("ExitValue: " + exitVal);
     } catch (Throwable t)
     t.printStackTrace();
{code}
{code}
public class StreamGobbler implements Runnable
InputStream is;
OutputStream os;
String type;
Thread thread;
public static String chaine;
StreamGobbler(InputStream is, String type)
this.is = is;
this.os=null;
this.type = type;
StreamGobbler(OutputStream os, String type)
this.os = os;
this.is=null;
this.type = type;
public void start () {
     thread = new Thread(this);
     thread.start ();
public void run()
try
if (is == null){
     PrintWriter toProgram = new PrintWriter(os);
     File FolderToProcess = ProcessFolder.Folder;
String Folder = FolderToProcess.getPath();
toProgram.write(Folder);
toProgram.close();
else {
     if (os == null){
     InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line=null;
String comp = "Please enter the exact path of the directory that contains the files you want to process.";
while ( (line = br.readLine()) != null){
     if (type.equals("INPUT")){
          chaine+=line+"\n";
     if (line.equals(comp)) {
          System.out.println("give directory");RUN A JFILECHOOSER AND GIVE THE DIRECTORY TO THE OUTPUTSTREAM
System.out.println(type + ">" + line);
is.close ();
catch (IOException ioe){
     ioe.printStackTrace();
{code}
And here is an example of a simple perl script that could be used (it s a simple one !!) :
{code}
#!/usr/bin/perl -w
use strict;
print "Please enter the exact path of the directory that contains the files you want to process.\n";
my $dir= <STDIN>;
chomp ($dir);
print "titallala $dir";
if (the template of the file is not in the database){
print "Please give me the template so that I can put it in the database";
$dir= <STDIN>;
chomp ($dir);
{code}
Thank you for your help ... if it's possible to help me !!
Gael

BalusC -- The line that gives me my NullPointerException is when I call the "DisplayProduct()" method. Its a dumb question, but with NetBeans how do I find out which reference could be null? I'm not very familiar with how NetBeans works with finding out how to debug. Any help you can give me would be greatly appreciated.The IDE is com-plete-ly irrelevant. It's all about the source code.
Do you understand anyway when and why a NullPointerException is been thrown? It is a subclass of RuntimeException and those kind of exceptions are very trival and generally indicate an design/logic/thinking fault in your code.
SomeObject someObject = null; // The someObject reference is null.
someObject.doSomething(); // Invoking a reference which is null would throw NPE.

Perl Script execution causes system panic

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