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Su and run single line command

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# 1  
Old 05-02-2014
Su and run single line command
myenv.sh script sets LOG_DIR variable.
I can run the script and echo the variable in a single line as:

Code:
# First set LOG_DIR to some dummy 'NONE' value
[ysrini@linuxapp01a ~]$ export LOG_DIR="NONE"
[ysrini@linuxapp01a ~]$ echo ${LOG_DIR}
NONE

[ysrini@linuxapp01a ~]$ cat /tmp/bin/myenv.sh
export LOG_DIR="/tmp/log"

#The below command doesn't show the value from myenv.sh
[ysrini@linuxapp01a ~]$ /tmp/bin/myenv.sh; echo ${LOG_DIR}
NONE

# using dot and space works
[ysrini@linuxapp01a ~]$ . /tmp/bin/myenv.sh; echo ${LOG_DIR}
/tmp/log

Now I want to run the above command as another user, let's say the other user is 'ysrini' itself

Code:
#First set LOG_DIR to some dummy 'NONE' value
[ysrini@linuxapp01a ~]$ export LOG_DIR="NONE"
[ysrini@linuxapp01a ~]$ echo ${LOG_DIR}
NONE

[ysrini@linuxapp01a ~]$ su - ysrini -c ". /tmp/bin/myenv.sh; echo ${LOG_DIR}"
Password: 
NONE

Why is the command ". /tmp/bin/myenv.sh; echo ${LOG_DIR}" output /tmp/log without 'su' and NONE with 'su'?


Thanks,
-srinivas y.
# 2  
Old 05-02-2014
This string: ". /tmp/bin/myenv.sh; echo ${LOG_DIR}" substitutes ${LOG_DIR} before su is run. Use single-quotes ' ' instead to prevent it from substituting.
This User Gave Thanks to Corona688 For This Post:
ysrini
# 3  
Old 05-03-2014
Thanks Corona, single quotes did the work !
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