[SOLVED]Why does .bash_profile seem tobe read in non-login shells too?
~/.bash_profile:
. $HOME/.bashrc
~/.bashrc:
export PATH=$PATH:$HOME/code/shell
(irrelevant lines left out)
(I have no ~/.profile, ~/.bash_login or * ~/.bash_logout. I have also never edited /etc/profile or /etc/bash.bashrc.)
I've read that in a login shell (e.g. TTY1) only the former is read, which in my case sources the latter. Running "export -p" in TTY1 gives a result consistent with this:
declare -x PATH="/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/bin/core_perl:/home/lazar/code/shell" (/home/lazar/code/shell is only listed once)
I've also read that in a non-login shell (e.g. xterm) only the latter is read. However, when I run "export -p" in xterm or urxvt I get an unexpected result:
declare -x PATH="/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/bin/core_perl:/home/lazar/code/shell:/home/lazar/code/shell" (/home/lazar/code/shell is listed twice!)
This implies that ~.bashrc is read twice, perhaps because .bash_profile is read in non-login shells too, even though it shouldn't be, should it? It doesn't seem to matter really, but I can't help but wonder why...
[EDIT]
I've found the answer. Exports from .bash_profile are done at boot time and *remain* active while X is active. Opening a non-login shell will cause .bashrc to export as well. Hence the duplication. My solution:
~/.bash_profile:
export PATH=$PATH:$HOME/code/shell
. $HOME/.bashrc
~/.bashrc:
(lines other than export commands)
Last edited by Lazar (2011-02-14 07:57:56)
As I wondered, I think it's a problem with passwd. I don't have a dbus entry and must have missed it when I was copying things around between my version and the .pacnew. Downloading an install disc now since I can't seem to change it from the recovery console due to mounting root read-only.
I'd love to know of a way to boot that avoids starting dbus and other things that might break while still having read/write access to root. Will mark solved once I update /etc/passwd and reboot.
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Why does this class not read and write at same time???
I had another thread where i was trying to combine two class files together
http://forum.java.sun.com/thread.jspa?threadID=5146796
I managed to do it myself but when i run the file it does not work right. If i write a file then try and open the file it says there are no records in the file, but if i close the gui down and open the file everything get read in as normal can anybody tell me why?
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import bank.BankUI;
import bank.*;
public class testing extends JFrame {
private ObjectOutputStream output;
private BankUI userInterface;
private JButton SaveToFile, SaveAs, Exit; //////////savetofile also saves to store need to split up and have 2 buttons
//private Store store; MIGHT BE SOMETHING TO DO WITH THIS AS I HAD TO COMMENT THIS STORE OUT TO GET IT WORKING AS STORE IS USED BELOW
private Employee record;
//////////////////////////////////////from read
private ObjectInputStream input;
private JButton nextButton, openButton, nextRecordButton ;
private Store store = new Store(100);
private Employee employeeList[] = new Employee[100];
private int count = 0, next = 0;
/////////////////////////////////////////////from read end
// set up GUI
public testing()
super( "Employee Data" ); // appears in top of gui
// create instance of reusable user interface
userInterface = new BankUI( 9 ); // nine textfields
getContentPane().add( userInterface, BorderLayout.CENTER );
// configure button doTask1 for use in this program
SaveAs = userInterface.getSaveAsButton();
SaveAs.setText( "Save as.." );
//////////////////from read
openButton = userInterface.getOpenFileButton();
openButton.setText( "Open File" );
openButton.addActionListener(
// anonymous inner class to handle openButton event
new ActionListener() {
// close file and terminate application
public void actionPerformed( ActionEvent event )
openFile();
} // end anonymous inner class
); // end call to addActionListener
// register window listener for window closing event
addWindowListener(
// anonymous inner class to handle windowClosing event
new WindowAdapter() {
// close file and terminate application
public void windowClosing( WindowEvent event )
if ( input != null )
closeFile();
System.exit( 0 );
} // end anonymous inner class
); // end call to addWindowListener
// get reference to generic task button doTask2 from BankUI
nextButton = userInterface.getDoTask2Button();
nextButton.setText( "Next Record" );
nextButton.setEnabled( false );
// register listener to call readRecord when button pressed
nextButton.addActionListener(
// anonymous inner class to handle nextRecord event
new ActionListener() {
// call readRecord when user clicks nextRecord
public void actionPerformed( ActionEvent event )
readRecord();
} // end anonymous inner class
); // end call to addActionListener
//get reference to generic task button do Task3 from BankUI
// get reference to generic task button doTask3 from BankUI
nextRecordButton = userInterface.getDoTask3Button();
nextRecordButton.setText( "Get Next Record" );
nextRecordButton.setEnabled( false );
// register listener to call readRecord when button pressed
nextRecordButton.addActionListener(
// anonymous inner class to handle nextRecord event
new ActionListener() {
// call readRecord when user clicks nextRecord
public void actionPerformed( ActionEvent event )
getNextRecord();
} // end anonymous inner class
); // end call to addActionListener
///////////from read end
// register listener to call openFile when button pressed
SaveAs.addActionListener(
// anonymous inner class to handle openButton event
new ActionListener() {
// call openFile when button pressed
public void actionPerformed( ActionEvent event )
SaveLocation();
} // end anonymous inner class
); // end call to addActionListener
// configure button doTask2 for use in this program
SaveToFile = userInterface.getSaveStoreToFileButton();
SaveToFile.setText( "Save to store and to file need to split this task up" );
SaveToFile.setEnabled( false ); // disable button
// register listener to call addRecord when button pressed
SaveToFile.addActionListener(
// anonymous inner class to handle enterButton event
new ActionListener() {
// call addRecord when button pressed
public void actionPerformed( ActionEvent event )
addRecord(); // NEED TO SPLIT UP SO DONT DO BOTH
} // end anonymous inner class
); // end call to addActionListener
Exit = userInterface.getExitAndSaveButton();
Exit.setText( "Exit " );
Exit.setEnabled( false ); // disable button
// register listener to call addRecord when button pressed
Exit.addActionListener(
// anonymous inner class to handle enterButton event
new ActionListener() {
// call addRecord when button pressed
public void actionPerformed( ActionEvent event )
addRecord(); // adds record to to file
closeFile(); // closes everything
} // end anonymous inner class
); // end call to addActionListener
// register window listener to handle window closing event
addWindowListener(
// anonymous inner class to handle windowClosing event
new WindowAdapter() {
// add current record in GUI to file, then close file
public void windowClosing( WindowEvent event )
if ( output != null )
addRecord();
closeFile();
} // end anonymous inner class
); // end call to addWindowListener
setSize( 600, 500 );
setVisible( true );
store = new Store(100);
} // end CreateSequentialFile constructor
// allow user to specify file name
////////////////from read
// enable user to select file to open
private void openFile()
// display file dialog so user can select file to open
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode( JFileChooser.FILES_ONLY );
int result = fileChooser.showOpenDialog( this );
// if user clicked Cancel button on dialog, return
if ( result == JFileChooser.CANCEL_OPTION )
return;
// obtain selected file
File fileName = fileChooser.getSelectedFile();
// display error if file name invalid
if ( fileName == null || fileName.getName().equals( "" ) )
JOptionPane.showMessageDialog( this, "Invalid File Name",
"Invalid File Name", JOptionPane.ERROR_MESSAGE );
else {
// open file
try {
input = new ObjectInputStream(
new FileInputStream( fileName ) );
openButton.setEnabled( false );
nextButton.setEnabled( true );
// process exceptions opening file
catch ( IOException ioException ) {
JOptionPane.showMessageDialog( this, "Error Opening File",
"Error", JOptionPane.ERROR_MESSAGE );
} // end else
} // end method openFile
public void readRecord() // need to merger with next record
Employee record;
// input the values from the file
try {
record = ( Employee ) input.readObject();
employeeList[count++]= record;
store.add(record);/////////ADDS record to Store
store.displayAll();
System.out.println("Count is " + store.getCount());
// create array of Strings to display in GUI
String values[] = {
String.valueOf(record.getName()),
String.valueOf(record.getGender()),
String.valueOf( record.getDateOfBirth()),
String.valueOf( record.getID()),
String.valueOf( record.getStartDate()),
String.valueOf( record.getSalary()),
String.valueOf( record.getAddress()),
String.valueOf( record.getNatInsNo()),
String.valueOf( record.getPhone())
// i added all those bits above split onto one line to look neater
// display record contents
userInterface.setFieldValues( values );
// display message when end-of-file reached
catch ( EOFException endOfFileException ) {
nextButton.setEnabled( false );
nextRecordButton.setEnabled( true );
JOptionPane.showMessageDialog( this, "No more records in file",
"End of File", JOptionPane.ERROR_MESSAGE );
// display error message if class is not found
catch ( ClassNotFoundException classNotFoundException ) {
JOptionPane.showMessageDialog( this, "Unable to create object",
"Class Not Found", JOptionPane.ERROR_MESSAGE );
// display error message if cannot read due to problem with file
catch ( IOException ioException ) {
JOptionPane.showMessageDialog( this,
"Error during read from file",
"Read Error", JOptionPane.ERROR_MESSAGE );
} // end method readRecord
private void getNextRecord()
Employee record = employeeList[next++%count];//cycles throught accounts
//create aray of string to display in GUI
String values[] = {String.valueOf(record.getName()),
String.valueOf(record.getGender()),
String.valueOf( record.getStartDate() ), String.valueOf( record.getAddress()),
String.valueOf( record.getNatInsNo()),
String.valueOf( record.getPhone()),
String.valueOf( record.getID() ),
String.valueOf( record.getDateOfBirth() ),
String.valueOf( record.getSalary() ) };
//display record contents
userInterface.setFieldValues(values);
//display record content
///////////////////////////////////from read end
private void SaveLocation()
// display file dialog, so user can choose file to open
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode( JFileChooser.FILES_ONLY );
int result = fileChooser.showSaveDialog( this );
// if user clicked Cancel button on dialog, return
if ( result == JFileChooser.CANCEL_OPTION )
return;
File fileName = fileChooser.getSelectedFile(); // get selected file
// display error if invalid
if ( fileName == null || fileName.getName().equals( "" ) )
JOptionPane.showMessageDialog( this, "Invalid File Name",
"Invalid File Name", JOptionPane.ERROR_MESSAGE );
else {
// open file
try {
output = new ObjectOutputStream(
new FileOutputStream( fileName ) );
SaveAs.setEnabled( false );
SaveToFile.setEnabled( true );
Exit.setEnabled( true );
// process exceptions from opening file
catch ( IOException ioException ) {
JOptionPane.showMessageDialog( this, "Error Opening File",
"Error", JOptionPane.ERROR_MESSAGE );
} // end else
} // end method openFile
// close file and terminate application
private void closeFile()
// close file
try {
//you want to cycle through each recordand add them to store here.
int storeSize = store.getCount();
for (int i = 0; i<storeSize;i++)
output.writeObject(store.elementAt(i));
output.close();
input.close();// from read!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
System.exit( 0 );
// process exceptions from closing file
catch( IOException ioException ) {
JOptionPane.showMessageDialog( this, "Error closing file",
"Error", JOptionPane.ERROR_MESSAGE );
System.exit( 1 );
} // end method closeFile
// add record to file
public void addRecord()
int employeeNumber = 0;
String fieldValues[] = userInterface.getFieldValues();
// if account field value is not empty
if ( ! fieldValues[ BankUI.IDNUMBER ].equals( "" ) ) {
// output values to file
try {
employeeNumber = Integer.parseInt(
fieldValues[ BankUI.IDNUMBER ] );
String dob = fieldValues[ BankUI.DOB ];
String[] dateofBirth = dob.split ("-"); // what used to put between number chnage to /
String sDate = fieldValues[ BankUI.START ];
String[] startDate = sDate.split ("-");
String sex = fieldValues[ BankUI.GENDER ];
char gender = (sex.charAt(0)); // check if m or f prob check in employee
if ( employeeNumber >= 0 ) {
/* create new record =String name, char gender, Date dob, String add, String nin, String phone, String id, Date start, float salary*/
record = new Employee(
fieldValues[ BankUI.NAME ],
gender,
new Date( Integer.parseInt(dateofBirth[0]),
Integer.parseInt(dateofBirth[1]),
Integer.parseInt(dateofBirth[2])),
fieldValues[ BankUI.ADDRESS ],
fieldValues[ BankUI.NATINTNO ],
fieldValues[ BankUI.PHONE ],
fieldValues[ BankUI.IDNUMBER ],
new Date( Integer.parseInt(startDate[0]),
Integer.parseInt(startDate[1]),
Integer.parseInt(startDate[2])),
Float.parseFloat( fieldValues[ BankUI.SALARY ] ));
if (!store.isFull())
store.add(record);
else
JOptionPane.showMessageDialog( this, "The Store is full you cannot add\n"+
"anymore employees. \nPlease Save Current File and Create a New File." );
System.out.println("Store full");
store.displayAll();
System.out.println("Count is " + store.getCount());
// output record and flush buffer
//output.writeObject( record );
output.flush();
else
JOptionPane.showMessageDialog( this,
"Account number must be greater than 0",
"Bad account number", JOptionPane.ERROR_MESSAGE );
// clear textfields
userInterface.clearFields();
} // end try
// process invalid account number or balance format
catch ( NumberFormatException formatException ) {
JOptionPane.showMessageDialog( this,
"Bad ID number, Date or Salary", "Invalid Number Format",
JOptionPane.ERROR_MESSAGE );
// process exceptions from file output
catch ( ArrayIndexOutOfBoundsException ArrayException ) {
JOptionPane.showMessageDialog( this, "Error with Start Date or Date of Birth\nPlease enter like: 01-01-2001",
"IO Exception", JOptionPane.ERROR_MESSAGE );
// process exceptions from file output
catch ( IOException ioException ) {
JOptionPane.showMessageDialog( this, "Error writing to file",
"IO Exception", JOptionPane.ERROR_MESSAGE );
closeFile();
} // end if
} // end method addRecord
public static void main( String args[] )
new testing();
} // end class CreateSequentialFileSure you can read and write at the same time. But normally you would be reading from one place and writing to another place.
I rather regret avoiding the OP's earlier post asking how to combine two classes. I looked at the two classes posted and realized the best thing to do was actually to break them into more classes. But I also realized it was going to be a big job explaining why and how, and I just don't have the patience for that sort of thing.
So now we have a Big Ball Of Tar™ and I feel partly responsible. -
[SOLVED] Why does jre7-openjdk-headless require a version bump?
I'm attempting to update my system, and I get the following error.
sudo pacman -Syu
:: Starting full system upgrade...
resolving dependencies...
looking for inter-conflicts...
:: jre7-openjdk-headless and jre7-openjdk-headless-infinality are in conflict. Remove jre7-openjdk-headless-infinality? [y/N]
error: unresolvable package conflicts detected
error: failed to prepare transaction (conflicting dependencies)
:: jre7-openjdk-headless and jre7-openjdk-headless-infinality are in conflict
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However, I was interested in what exactly was requesting this version bump in the first place. I presume that it's a package that jre7-openjdk-headless-infinality is a dependency for. I looked firstly at what needed to be updated on my system, noting jre7-openjdk.
$ pacman -Qu
calibre 1.206.0-1
device-mapper 2.02.108-1
ffmpeg 1:2.3.1-1
jdk7-openjdk 7.u65_2.5.1-3
jre7-openjdk 7.u65_2.5.1-3
lib32-krb5 1.12.1-2
lvm2 2.02.108-1
mesa-demos 8.2.0-1
xf86-input-synaptics 1.8.0-2
I had a look at the reverse dependencies for jre7-openjdk-headless-infinality, noting jre7-openjdk again.
$ pacman -Qii jre7-openjdk-headless-infinality
Provides : java-runtime-headless=7 jre7-openjdk-headless
Depends On : libjpeg-turbo lcms2 nss ca-certificates-java
Required By : jre7-openjdk
Conflicts With : openjdk6 jre7-openjdk-headless jre7-openjdk-headless-fontfix
I interpret that as pacman -Syu saying that jre7-openjdk needs an update, and this also depends on jre7-openjdk-headless-infinality. I double checked this.
$ pacman -Qi jre7-openjdk
Provides : java-runtime=7
Depends On : jre7-openjdk-headless xdg-utils hicolor-icon-theme
So I can see that jre7-openjdk actually depends on jre7-openjdk-headless, which can be provided by jre7-openjdk-headless-infinality (as above). However, I don't understand why a new version of jre7-openjdk requires a bump in version of jre7-openjdk-headless (or jre7-openjdk-headless-infinality). Have I misunderstood something?
Last edited by Salkay (2014-08-24 12:34:29)EDIT: actually, when testing the different "useSystemAAFontSettings" parameters I somehow missed "on" - that one does indeed work well enough with the arch java packages. I still prefer the "--enable-infinality=yes" version, but you can scrap my whining below - PEBCAK.
Wikimig wrote:What I mean is: I think you don't even need Infinality patch (just like most of people using this package). I am pretty sure you can get to a nice clean look with official Arch Linux packages.
I completely understand that the official package has to remove the infinality flag if it breaks (default) non-infinality setups - but:
You should definitely give fontconfig-infinality a try (very easy to install thanks to bohoomil's bundle). In my experience it massively improves font rendering. However, the current java7-openjdk really does not work with it, there is no way to get a nice clean look. I tried all the AA settings, and they were all terrible.
Best settings with vanilla java7
Same settings with --enable-infinality
It looks even worse in reality, but just zoom in all the way to the left upper corner and compare... these are some pretty sparkling rainbow fonts
Again, unfortunate, but I rather rebuild from ABS with "--enable-infinality=yes" than drop infinality completely.
Last edited by hokasch (2014-09-01 13:25:32) -
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When the smart card reader is connected before the Mac is turned on, then I can't login: After entering the password, it hangs with the spinning color icon.
I can boot without the reader, though. If the reader is plugged in after boot, this happens:
Safari doesn't start up, all I see is the color spinner. Finder gets blocked as well while Safari is trying to start up (i.e. forever)
If I have a Terminal open, then I can "kill -9" the Safari process, which unblocks the Finder.
When I then try to shut down, it hangs with a white screen, and never properly finishes until power off.
How can I debug or solve this problem?
Thanks! MartinIt's a very common device (Omnikey 3121), which should be compatible. Nevertheless, I installed drivers from the manufactor's site to see if they make any difference. On reboot after driver installation I got a kernel panic within the HID drivers. Very strange.
Kernel Extensions in backtrace:
com.apple.iokit.IOHIDFamily(2.0)[994495B5-FB34-3DB5-B47A-D2A732E52F33]@0xffffff 7f811c1000->0xffffff7f81232fff
dependency: com.apple.driver.AppleFDEKeyStore(28.30)[2A8A5F6B-0A7C-33A0-8E5B-4C10F646EC4F]@ 0xffffff7f811b6000
After reboot it seems to work fine, but I'll have to check some more. -
Why does it seem like notify() acts like notifyAll() for threads?
I'm running a little exercise here:
class Reader extends Thread {
Calculator c;
String name ="Fred";
static int i = 0;
public Reader(Calculator calc) {
c = calc;
name = "Fred"+(i++);
public void run() {
synchronized(c) {
try {
System.out.println(name + " is waiting for calculation...");
c.wait();
} catch (InterruptedException e) {}
System.out.println("Total is: " + c.total + " for "+name);
public static void main(String [] args) {
Calculator calculator = new Calculator();
new Reader(calculator).start();
new Reader(calculator).start();
new Reader(calculator).start();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
System.out.println("Got interrupted");
calculator.start();
class Calculator extends Thread {
int total;
public void run() {
synchronized(this) {
for(int i=0;i<100;i++) {
total += i;
System.out.println("Notifying start");
notify();
System.out.println("Notifying end");
}the output is
Fred0 is waiting for calculation...
Fred1 is waiting for calculation...
Fred2 is waiting for calculation...
Notifying start
Notifying end
Total is: 4950 for Fred0
Total is: 4950 for Fred2
Total is: 4950 for Fred1
I expect only one "Total is: ..." output to come out since I expect only one thread to wake up from its waiting state from that notify() call. However all three threads wake up. What am I misunderstanding? I thought a thread waits forever unless you pass a time parameter into wait()... or am I wrong?
Edited by: lapchern on Nov 17, 2009 12:53 PMWell, first of all, don't discard Exceptions and then wonder about the behaviour of a program :-).
But that's not the issue here. From some quick testing, I didn't get the same behaviour when I ran using wait/notify on a lock object, not the thread itself:
public class WaitNotify extends Thread {
Calculator c;
String name ="Fred";
static int i = 0;
public WaitNotify(Calculator calc) {
c = calc;
name = "Fred"+(i++);
public void run() {
synchronized(c.lock) {
try {
System.out.println(name + " is waiting for calculation...");
c.lock.wait();
} catch (InterruptedException e) {
e.printStackTrace();
System.out.println("Total is: " + c.total + " for "+name);
public static void main(String [] args) {
Calculator calculator = new Calculator();
new WaitNotify(calculator).start();
new WaitNotify(calculator).start();
new WaitNotify(calculator).start();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
System.out.println("Got interrupted");
calculator.start();
class Calculator extends Thread {
int total;
final Object lock = new Object();
public void run() {
synchronized(lock) {
for(int i=0;i<100;i++) {
total += i;
System.out.println("Notifying start");
lock.notify();
System.out.println("Notifying end");
}Not sure ATM why that is, but it's I think best practice not to lock on the Thread itself and instead a different Object, so there's a fix. It'll give you a place to start investigating.
Edit: Might be good to look at the [Javadoc for Object.wait()|http://java.sun.com/javase/6/docs/api/java/lang/Object.html#wait()]:
...interrupts and spurious wakeups are possible, and this method should always be used in a loop:
synchronized (obj) {
while (<condition does not hold>)
obj.wait();
... // Perform action appropriate to condition
Edited by: endasil on 17-Nov-2009 4:08 PM
Edited by: endasil on 17-Nov-2009 4:09 PM
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