[clue] env variables

[Mark G. Harvey]

CLUE experts, 

This puzzle is likely simple for you folks, but it has me stumped.  I've done considerable digging but have found mixed advice. 

I've created a script to download from a local repo via wget an rpm to install JDK ... no problem there. 

Here's the part I can't get right ... setting the variables so I can run scripts to install Tomcat ... Any attempt will bomb if it can't find /usr/java/jdk1.7.0_21/bin  


# set JAVA_HOME variable   ... tried in vain
echo "setting JAVA_HOME variable variable for the session" 
JAVA_HOME=/usr/java/jdk1.7.0_21
# export JAVA_HOME variable  ... tried in vain
echo "exporting JAVA_HOME variable variable for the session" 
export JAVA_HOME=/usr/java/jdk1.7.0_21
echo "JAVA_HOME variable: $JAVA_HOME"

# set PATH variable for the session   ... tried in vain
echo "setting PATH variable for the session" 
PATH=$PATH:/usr/java/jdk1.7.0_21/bin
# export PATH variable for the session
echo "exporting PATH variable for the subsequent sessions & processes" 
export PATH=$PATH:/usr/java/jdk1.7.0_21/bin
echo "show PATH variable: $PATH"

sleep 3  # wait

# create script to set JAVA_HOME & PATH variables in /etc/profile.d/00_jdk.sh script for all accounts
# use echo command with single quotes to write the literal statement to the script
touch /etc/profile.d/00_jdk.sh
echo '#!/bin/bash' >> /etc/profile.d/00_jdk.sh
echo '# set JAVA_HOME in /etc/profile.d/00_jdk.sh script for all accounts' >> /etc/profile.d/00_jdk.sh
echo 'JAVA_HOME=/usr/java/jdk1.7.0_21' >> /etc/profile.d/00_jdk.sh
echo '# set PATH in /etc/profile.d/00_jdk.sh script for all accounts' >> /etc/profile.d/00_jdk.sh
echo 'PATH=$PATH:/usr/java/jdk1.7.0_21/bin' >> /etc/profile.d/00_jdk.sh  

sleep 3  # wait

echo "review contents of /etc/profile.d/00_jdk.sh"
cat /etc/profile.d/00_jdk.sh


... results of install ... added some blank lines for readability ...

[root at 87148-mondev01 ~]# ./DEV_install_jdk1.7-1.0.0.sh 
installation:  Oracle/Sun jdk 1.7 64-bit
remount /tmp with execute privledge
changed to /tmp
Pulling package from Artifactory Repo Management Server
--2013-06-24 13:24:38--  https://<RepoHost>/artifactory/simple/ext-release-local/oracle/jdk/7u21-linux/jdk-7u21-linux-x64.rpm
Resolving <RepoHost>... 10.33.44.10
Connecting to <RepoHost>|10.33.44.10|:443... connected.

HTTP request sent, awaiting response... 200 OK

Length: 85388149 (81M) [application/x-rpm]
Saving to: “jdk-7u21-linux-x64.rpm”

100%[=======================================================================================================================================>] 85,388,149  52.7M/s   in 1.5s    

2013-06-24 13:24:40 (52.7 MB/s) - “jdk-7u21-linux-x64.rpm” saved [85388149/85388149]

jdk downloaded
check /tmp/ contents for jdk
-rw-r--r--. 1 root root 85388149 Jun  6 16:46 jdk-7u21-linux-x64.rpm
install jdk rpm
Preparing...                ########################################### [100%]
package jdk-2000:1.7.0_21-fcs.x86_64 is already installed      ........ due to subsequent running of this script
install jdk complete

setting JAVA_HOME variable variable for the session
exporting JAVA_HOME variable variable for the session

... when tested in the script, the correct answer shows up ... 

JAVA_HOME variable: /usr/java/jdk1.7.0_21   

setting PATH variable for the session
exporting PATH variable for the subsequent sessions & processes

... when tested in the script, the correct answer shows up ... 


show PATH variable: /usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/java/jdk1.7.0_21/bin:/usr/java/jdk1.7.0_21/bin

review contents of /etc/profile.d/00_jdk.sh
#!/bin/bash
# set JAVA_HOME in /etc/profile.d/00_jdk.sh script for all accounts
JAVA_HOME=/usr/java/jdk1.7.0_21
# set PATH in /etc/profile.d/00_jdk.sh  script for all accounts
PATH=$PATH:/usr/java/jdk1.7.0_21/bin
remount /tmp removing execute privledge
finished


... after script runs, when tested from CLI, variables not not correct ... 

[root at 87148-mondev01 ~]# echo $JAVA_HOME

[root at 87148-mondev01 ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin



[root at 87148-mondev01 ~]# exit
logout

[vwadmin at 87148-mondev01 ~]$ su -
Password: 


... now the variable additions show up ... they come from the /etc/profile.d/00_jdk.sh script created as part of the JDK download & install ... 

[root at 87148-mondev01 ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/java/jdk1.7.0_21/bin:/root/bin

[root at 87148-mondev01 ~]# echo $JAVA_HOME
/usr/java/jdk1.7.0_21



... How can I get the variables to be available for the current root session & usable for subsequent installations?  Trying to avoid the logout / login ... 



Thanks for your help.  
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