For a given process ID, how do I determine environment variables (e.g. PATH)?

At command line, what is the best/most direct way to determine the environment variables (e.g. PATH) for a given process ID? Must be able to query for any arbitrary environment variable. PATH is just the first example.
'lsof -a -p $PID -d cwd -F' gets some of it.
But, I don't see a way to get the PATH for the given PID, using lsof.
'ps -Ep $PID' gets some of it.
But, again, 'not comprehensive. It appears to give back only a portion of the 'environment' for the process.
On a number of other Linux/UNIX variants, you can look at '/proc/<pid>/environ'. But, OS X apparently does not use that mechanism.
Newb coming from the Linux world. Please pardon my ignorance. Reading as fast as I can.....

You seem to have found the solution on your own, but if you need more you may have greater success posting here.
https://discussions.apple.com/community/mac_os/mac_os_x_technologies?view=discus sions

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How can I pass environment variables to the child process?

How can I pass environment variables to the child process? This is what I tried and it didn't work.
     static public void main (String[] args) throws Exception {
          ProcessBuilder b = new ProcessBuilder("java", "-cp", ".", "Child");
          Map<String, String> map = b.environment();
          map.put("custom.property", "my value");
             b.redirectErrorStream(true);
          Process p = b.start();
          BufferedReader reader = new BufferedReader (new InputStreamReader(p.getInputStream()));
          String line = null;
          while (null != (line = reader.readLine())) {
               System.out.println(line);
     public static void main(String[] args) {
          System.out.println("The value of custom.property is : " + System.getProperty("custom.property"));
     }and the result is:
The value of custom.property is : null

Complete test:
     static public void main (String[] args) throws Exception {
          ProcessBuilder b = new ProcessBuilder("java", "-Dcustom.property=my property value", "-cp", ".", "Child");
          Map<String, String> map = b.environment();
          map.put("custom.property", "my environment value");
             b.redirectErrorStream(true);
          Process p = b.start();
          BufferedReader reader = new BufferedReader (new InputStreamReader(p.getInputStream()));
          String line = null;
          while (null != (line = reader.readLine())) {
               System.out.println(line);
     public static void main(String[] args) {
          System.out.println("Property value of custom.property is : " + System.getProperty("custom.property"));
          System.out.println("Environment value of custom.property is : " + System.getenv("custom.property"));
     }

How to get system Environment variable?

How to get system Environment variable without using jni?
just like "JAVA_HOME" or "PATH"...
Any reply is help to me!! :-)

Thx for your reply...
I get it!!!
Read environment variables from an application
Start the JVM with the "-D" switch to pass properties to the application and read them with the System.getProperty() method. SET myvar=Hello world
SET myothervar=nothing
java -Dmyvar="%myvar%" -Dmyothervar="%myothervar%" myClass
then in myClass String myvar = System.getProperty("myvar");
String myothervar = System.getProperty("myothervar");
This is useful when using a JAVA program as a CGI.
(DOS bat file acting as a CGI) java -DREQUEST_METHOD="%REQUEST_METHOD%"
-DQUERY_STRING="%QUERY_STRING%"
javaCGI
If you don't know in advance, the name of the variable to be passed to the JVM, then there is no 100% Java way to retrieve them.
NOTE: JDK1.5 provides a way to achieve this, see this HowTo.
One approach (not the easiest one), is to use a JNI call to fetch the variables, see this HowTo.
A more low-tech way, is to launch the appropriate call to the operating system and capture the output. The following snippet puts all environment variables in a Properties class and display the value the TEMP variable. import java.io.*;
import java.util.*;
public class ReadEnv {
public static Properties getEnvVars() throws Throwable {
Process p = null;
Properties envVars = new Properties();
Runtime r = Runtime.getRuntime();
String OS = System.getProperty("os.name").toLowerCase();
// System.out.println(OS);
if (OS.indexOf("windows 9") > -1) {
p = r.exec( "command.com /c set" );
else if ( (OS.indexOf("nt") > -1)
|| (OS.indexOf("windows 2000") > -1 )
|| (OS.indexOf("windows xp") > -1) ) {
// thanks to JuanFran for the xp fix!
p = r.exec( "cmd.exe /c set" );
else {
// our last hope, we assume Unix (thanks to H. Ware for the fix)
p = r.exec( "env" );
BufferedReader br = new BufferedReader
( new InputStreamReader( p.getInputStream() ) );
String line;
while( (line = br.readLine()) != null ) {
int idx = line.indexOf( '=' );
String key = line.substring( 0, idx );
String value = line.substring( idx+1 );
envVars.setProperty( key, value );
// System.out.println( key + " = " + value );
return envVars;
public static void main(String args[]) {
try {
Properties p = ReadEnv.getEnvVars();
System.out.println("the current value of TEMP is : " +
p.getProperty("TEMP"));
catch (Throwable e) {
e.printStackTrace();
Thanks to W.Rijnders for the W2K fix.
An update from Van Ly :
I found that, on Windows 2003 server, the property value for "os.name" is actually "windows 2003." So either that has to be added to the bunch of tests or just relax the comparison strings a bit: else if ( (OS.indexOf("nt") > -1)
|| (OS.indexOf("windows 2000") > -1 )
|| (OS.indexOf("windows 2003") > -1 ) // works but is quite specific to 2003
|| (OS.indexOf("windows xp") > -1) ) {
else if ( (OS.indexOf("nt") > -1)
|| (OS.indexOf("windows 20") > -1 ) // probably is better since no other OS would return "windows" anyway
|| (OS.indexOf("windows xp") > -1) ) {
I started with "windows 200" but thought "what the hell" and made it "windows 20" to lengthen its longivity. You could push it further and use "windows 2," I suppose. The only thing to watch out for is to not overlap with "windows 9."
On Windows, pre-JDK 1.2 JVM has trouble reading the Output stream directly from the SET command, it never returns. Here 2 ways to bypass this behaviour.
First, instead of calling directly the SET command, we use a BAT file, after the SET command we print a known string. Then, in Java, when we read this known string, we exit from loop. [env.bat]
@set
@echo **end
[java]
if (OS.indexOf("windows") > -1) {
p = r.exec( "env.bat" );
while( (line = br.readLine()) != null ) {
if (line.indexOf("**end")>-1) break;
int idx = line.indexOf( '=' );
String key = line.substring( 0, idx );
String value = line.substring( idx+1 );
hash.put( key, value );
System.out.println( key + " = " + value );
The other solution is to send the result of the SET command to file and then read the file from Java. ...
if (OS.indexOf("windows 9") > -1) {
p = r.exec( "command.com /c set > envvar.txt" );
else if ( (OS.indexOf("nt") > -1)
|| (OS.indexOf("windows 2000") > -1
|| (OS.indexOf("windows xp") > -1) ) {
// thanks to JuanFran for the xp fix!
p = r.exec( "cmd.exe /c set > envvar.txt" );
// then read back the file
Properties p = new Properties();
p.load(new FileInputStream("envvar.txt"));
Thanks to JP Daviau
// UNIX
public Properties getEnvironment() throws java.io.IOException {
Properties env = new Properties();
env.load(Runtime.getRuntime().exec("env").getInputStream());
return env;
Properties env = getEnvironment();
String myEnvVar = env.get("MYENV_VAR");
To read only one variable : // NT version , adaptation for other OS is left as an exercise...
Process p = Runtime.getRuntime().exec("cmd.exe /c echo %MYVAR%");
BufferedReader br = new BufferedReader
( new InputStreamReader( p.getInputStream() ) );
String myvar = br.readLine();
System.out.println(myvar);
Java's System properties contains some useful informations about the environment, for example, the TEMP and PATH environment variables (on Windows). public class ShowSome {
public static void main(String args[]){
System.out.println("TEMP : " + System.getProperty("java.io.tmpdir"));
System.out.println("PATH : " + System.getProperty("java.library.path"));
System.out.println("CLASSPATH : " + System.getProperty("java.class.path"));
System.out.println("SYSTEM DIR : " +
System.getProperty("user.home")); // ex. c:\windows on Win9x system
System.out.println("CURRENT DIR: " + System.getProperty("user.dir"));
Here some tips from H. Ware about the PATH on different OS.
PATH is not quite the same as library path. In unixes, they are completely different---the libraries typically have their own directories. System.out.println("the current value of PATH is: {" +
p.getProperty("PATH")+"}");
System.out.println("LIBPATH: {" +
System.getProperty("java.library.path")+"}");
gives the current value of PATH is:
{/home/hware/bin:/usr/local/bin:/usr/xpg4/bin:/opt/SUNWspro/bin:/usr/ccs/bin:
/usr/ucb:/bin:/usr/bin:/home/hware/linux-bin:/usr/openwin/bin/:/usr/games/:
/usr/local/games:/usr/ccs/lib/:/usr/new:/usr/sbin/:/sbin/:/usr/hosts/:
/usr/openwin/lib:/usr/X11/bin:/usr/bin/X11/:/usr/local/bin/X11:
/usr/bin/pbmplus:/usr/etc/:/usr/dt/bin/:/usr/lib:/usr/lib/lp/postscript:
/usr/lib/nis:/usr/share/bin:/usr/share/bin/X11:
/home/hware/work/cdk/main/cdk/../bin:/home/hware/work/cdk/main/cdk/bin:.}
LIBPATH:
{/usr/lib/j2re1.3/lib/i386:/usr/lib/j2re1.3/lib/i386/native_threads:
/usr/lib/j2re1.3/lib/i386/client:/usr/lib/j2sdk1.3/lib/i386:/usr/lib:/lib}
on my linux workstation. (java added all those execpt /lib and /usr/lib). But these two lines aren't the same on window either:
This system is windows nt the current value of PATH is:
{d:\OrbixWeb3.2\bin;D:\jdk1.3\bin;c:\depot\cdk\main\cdk\bin;c:\depot\
cdk\main\cdk\..\bin;d:\OrbixWeb3.2\bin;D:\Program
Files\IBM\GSK\lib;H:\pvcs65\VM\win32\bin;c:\cygnus
\cygwin-b20\H-i586-cygwin32\bin;d:\cfn\bin;D:\orant\bin;C:\WINNT\system32;C:\WINNT;
C:\Program Files\Dell\OpenManage\Resolution Assistant\Common\bin;
d:\Program Files\Symantec\pcAnywhere;
C:\Program Files\Executive Software\DiskeeperServer\;C:\Program Files\Perforce}
LIBPATH:
{D:\jdk1.3\bin;.;C:\WINNT\System32;C:\WINNT;d:\OrbixWeb3.2\bin;D:\jdk1.3\bin;
c:\depot\cdk\main\cdk\bin;c:\depot\cdk\main\cdk\..\bin;
d:\OrbixWeb3.2\bin;D:\Program Files\IBM\GSK\lib;
H:\pvcs65\VM\win32\bin;c:\cygnus\cygwin-b20\H-i586-cygwin32\bin;d:\cfn\bin;
D:\orant\bin;C:\WINNT\system32;
C:\WINNT;C:\Program Files\Dell\OpenManage\ResolutionAssistant\Common\bin;
d:\Program Files\Symantec\pcAnywhere;
C:\Program Files\Executive Software\DiskeeperServer\;C:\Program Files\Perforce}

How can I use environment variables in a controller?

Hi all,
How can I use environment variables in a controller?
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Is there a method somewhere that would resolve this??
By the way,Did anyone used the class of "oracle.apps.fnd.cp.request.RemoteFile"?
The following is the code.
My EBS server is installed with 2 nodes(one for current,and other is for application and DB).I want to copy the current server's file to the application server's $APPLTMP directory. But the result of "mCtx.getEnvStore().getEnv("APPLTMP")" is current server's $APPLTMP directory.
Can anyone help me on this?
private String getURL()
throws IOException
File locC = null;
File remC = new File(mPath);
String lurl = null;
CpUtil lUtil = new CpUtil();
String exten;
Connection lConn = mCtx.getJDBCConnection();
ErrorStack lES = mCtx.getErrorStack();
LogFile lLF = mCtx.getLogFile();
String gwyuid = mCtx.getEnvStore().getEnv("GWYUID");
String tmpDir = mCtx.getEnvStore().getEnv("APPLTMP");
String twoTask = mCtx.getEnvStore().getEnv("TWO_TASK");
// create temp file
mLPath = lUtil.createTempFile("OF", exten, tmpDir);
lUtil.logTempFile(mLPath, mLNode, mCtx);
Thanks,
binghao

However within OAF on the application it doesn't.
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hi
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Thanks !

An example of a Java application that does this is Ant, when you add a line like this in your build.xml:

<property environment="env"/>
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How to pass Unix environment variable to a SQL procedure or SQL * Plus

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How to pass Unix environment variable to a SQL procedure or SQL * Plus file..
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Within your shell script you can use what is known as a "here document" which is basically a way of wrapping a call to Oracle. The following call to Oracle loops and writes rows to files with numerically increasing file names. Two unix shell variables are used, one in a select statement and one in a spool command :
<pre>
#!/bin/bash
export ORACLE_SID=DEV05
FILENO=1007351
while [ ${FILENO} -le 1008400 ]
do
FILENAME=farm_${FILENO}.txt
DUMMY=`sqlplus -s user20/user20 <<SQLSTOP
set lines 73
set pages 0
set head off
set termout off
set echo off
set feedback off
select rpad(searchx, 8)
from blastx@PRODUCTION
where searchx = ${FILENO} ### here's a shell variable
spool /export/home/user20/sql/psiblast/BACKUP2_D/${FILENAME} ### here's a shell variable
spool off
SQLSTOP`
FILENO=`expr ${FILENO} + 1`
done
exit 0
</pre>

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I want to write a schedule task to pick up all tasks that are in Pending state and retry those tasks one by one, for all users on a given process definition. Can you please tell me if there is a way to do this and how?
Thanks

Hi,
you could use one of following and get more help by searching oracle docs or web search.
select * from test_tab where REGEXP_LIKE(test_column, '^T[[:digit:]]');
select * from t1 where regexp_like(a1, '^(t+[0-9]+)$');
select * from t1 where regexp_like(a1, '^([t]+[0-9]+)$');
select * from t1 where regexp_like(a1, 't[[:digit:]]{6}') or regexp_like(a1, 'T[[:digit:]]{6}');
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Hi Experts,
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Hello Sir/Madam,
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Hello All,
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jre\bin\java.exe
For the requested processing mode java policy
files within the used SAP JVM are needed.
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See also SAP note 1238121.
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Edited by: George King on Jun 29, 2009 9:01 PM

Hi everyone,
I had the same problem and found the solution !
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The installation file for the GUI is located at :
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Hope it helps !
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How to export an environment variable from command line ?

Hello,
I have build a python application which run some processes(or executable or other python scripts) using subprocess.
i.e.
subprocess.call(["xyz.py"], shell=True, stdout=log_file, stderr=log_file)
Above call throws an error as "xyz.py is not recognized as an internal or external command." I added the location of xyz.py into path variable inside a batch script which I used to run before running the script.
set PATH=D:\path of xyz:%PATH%
But As subprocess executes a script into anther child shell, This setting is not available in child shell (or sub-shell) used by python script.
How can I make this PATH setting available to sub-shell also ?

Rather than going into much details I have used explicit path by referring only one environment variable of the shell where application is running.
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Hi,
I hope someone can halp me out:
In the software that I develop it is neccessary to read some user (environment) variables, such as the temp folder of the current user.
I know that I can read out some system variables like this:
String homePath = System.getProperty("user.home");
But how can I read out some other variables, especially the temp folder of the current user?
Thanks

I might have misunderstood you, but I am notlooking
for the PATH variable. I need the location of
the
temp folder of the current user. This should be
called TEMP or so, but this does not work.Can you deduce from the link he provided, to lookat
System.getenv(), and find the "TEMP" environment
variable in what it returns to you?That said, I believe the "temp" folder may be
provided in one of the normal System properties
anyway, so you probably don't need to go that route.
Print all your System.getProperties() values, and see
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How to set timezone environment variable to EST

Hello Experts
I'm having problem when I try to run my Enterprise Manager. Listner start normaly but then I tries to start the database I got the following message.
oracle@linux-f4y3:~> /apps/oracle/product/10.2.0/db_1/bin/emctl start dbconsole
Oracle Enterprise Manager 10g Database Control Release 10.2.0.1.0
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.
http://linux-f4y3.site:1158/em/console/aboutApplication
Timezone mismatch: The agentTZRegion value (EST) in
/apps/oracle/product/10.2.0/db_1/linux-f4y3.site_orcl/sysman/config/emd.properties
does not match the current environment TZ setting(EST).
The dbconsole cannot run with this mismatch.
If EST is the correct timezone, set your timezone environment variable to EST and repeat the 'emctl start dbconsole' operation.
If EST is not the correct timezone, make sure that the timezone in your environment is correct, and then run the following command in your local Oracle Home: 'emctl resetTZ agent'
The output of this command will include detailed instructions to follow, to correct the mismatch.
To me looks like I need to fix the timezone on my machine but I don't know how. Can please somebody shows me the steps how to achieve this task?
Thanks a lot in advance.

I believe this issue is occurring because timezone info between the OS and oracle is out of synch - possibly because timezone patches have been applied to the OS or oracle, but not both. It is always good practice to apply such patches to both OS and Oracle.
Pl see these MOS Docs
401834.1 - Problem: DST: Workaround to EM Agent Restart Problem Due to a Daylight Savings Change
362888.1 - Problem: Startup Agent: EM Agent will not start due to Timezone mismatch (Daylight Savings changes for Australia)
549079.1 - Troubleshooting Database Control Startup Issues
HTH
Srini

For a given process ID, how do I determine environment variables (e.g. PATH)?

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