Visit Our UNIX and Linux User Community


How to tell which shell is running a script


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting How to tell which shell is running a script
# 8  
Old 10-23-2009
Quote:
Originally Posted by Scrutinizer
Code:
ps -p$$ | xargs -n1 | tail -1

linux:
Code:
ps p$$ ocomm h

Both of these return the name of the script. If I have a script named test.sh:
Code:
#!/bin/sh
ps -p$$ | xargs -n1 | tail -1

or

Code:
#!/bin/sh
ps p$$ ocomm h

both return "test.sh". I'm on RHEL 5.3.

I'm hoping to find somethat that will tell me "sh" or "ksh" or whatever shell is actually interpreting the script.
# 9  
Old 10-23-2009
Quote:
Originally Posted by sbaker
I'm hoping to find somethat that will tell me "sh" or "ksh" or whatever shell is actually interpreting the script.

It's better to test whether the current shell has the features your script needs.
# 10  
Old 10-23-2009
a variation on a theme (tested on Solaris):
Code:
#!/bin/ksh

echo "myShell->[$(ps -o 'pid,comm' -p "${$}" | xargs -n1 | tail -1)]"
# OR
# echo "myShell->[$(ps -o comm -p "$$" | { read; read comm; echo "$comm"; })]"


Last edited by vgersh99; 10-23-2009 at 07:45 PM..
# 11  
Old 10-23-2009
Quote:
Originally Posted by vgersh99
a variation on a theme (tested on Solaris):
Code:
#!/bin/ksh
 
echo "myShell->[$(ps -o 'pid,comm' -p "${$}" | xargs -n1 | tail -1)]"

This works for me on AIX, but on Linux it always returns:

myShell->[test.sh]
# 12  
Old 10-23-2009
I don't have linux in front of me, but most likely it should be a combination of what you do on above with what 'Scrutinizer' suggested previously.
Maybe others could 'port' this to linux for you.
# 13  
Old 10-23-2009
This should work in RHEL 5.3:
Code:
#!/bin/sh
comm=$(ps -p $$ -o command h|cut -d' ' -f1)
shell=${comm##*/}
echo $shell


Previous Thread | Next Thread
Test Your Knowledge in Computers #874
Difficulty: Medium
A programming language is homoiconic if a program written in it can be manipulated as data using the language, and thus the program's internal representation can be inferred just by reading the program itself.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Cp not working in shell script but running perfectly from shell

Dear All, I have script. Dest="" IFS=' ' for translation in $(echo $MY_MAP) do t1=$(echo $translation | cut -d"=" -f1) t2=$(echo $translation | cut -d"=" -f2| cut -d"," -f1) if then Dest=$UNX/$u_product_path/$u_study_path/$UNXTR/$t2 break; ... (4 Replies)
Discussion started by: yadavricky
4 Replies

2. Shell Programming and Scripting

Running 3 shell script parallel in another shell script

Hi, I'm trying to do teh below thing. I have a single script which uses 3 different parameters to do 3 different work like belwo. test1.sh par1 -- it shuts down an instance test1.sh par2 -- it shuts down an instance test1.sh par3 -- it shuts down an instance Now I created a script... (7 Replies)
Discussion started by: bhaski2012
7 Replies

3. Shell Programming and Scripting

Changing shell from a script and running something from the new shell

Hi We use "tcsh" shell . We do the following steps manually: > exec ssh-agent zsh > python "heloo.py" (in the zsh shell) I am trying to do the steps above from a shell script This is what I have so far echo "Executing " exec ssh-agent zsh python "hello.py" exit 0 Problem is... (5 Replies)
Discussion started by: heman82
5 Replies

4. Shell Programming and Scripting

Shell Script is not running

Hi, when iam running below command it is executing fine on my linux command prompt. java -jar Efile.jar but the same command iam using in Shell script it doesnt work and saying error Unable to access jar files. Flavour is Linux Redhat. pls help (1 Reply)
Discussion started by: Riverstone
1 Replies

5. Shell Programming and Scripting

Shell Script for continuously checking status of a another script running in background, and immedia

Hi, I want to write a script which continuously checking status of a script running in background by nohup command. And if same script is not running then immediately start the script...please help.. i am using below command to run script nohup system_traps.sh & but in some... (9 Replies)
Discussion started by: ketanraut
9 Replies

6. Shell Programming and Scripting

Bash shell script to check if script itself is running

hi guys we've had nagios spewing false alarm (for the umpteenth time) and finally the customer had enough so they're starting to question nagios. we had the check interval increased from 5 minutes to 2 minutes, but that's just temporary solution. I'm thinking of implementing a script on the... (8 Replies)
Discussion started by: hedkandi
8 Replies

7. Shell Programming and Scripting

Shell script running command in different shell

Hi All, Is there any way where we can run few commands with different shell in a shell script ? Let's have an example below, My first line in script reads below, #!/bin/sh However due to some limitation of "/bin/sh" shell I wanted to use "/bin/bash" while executing few... (9 Replies)
Discussion started by: gr8_usk
9 Replies

8. Shell Programming and Scripting

running a shell script

sometimes while running a shell script we use ksh -c '....script' what is the significance of ksh -c here .... what if i run the script only.what is the difference (6 Replies)
Discussion started by: dr46014
6 Replies

9. UNIX for Advanced & Expert Users

shell script not running

Dear Friends, OS: REDHAT ENTERPRISE LINUX ,nash version I am facing a peculier type of problem.A bash script ran yesterday does not run successfully today . Absolutely giving NO OUTPUT AT ALL. We have migrated recently from redhat linux 9 to REDHAT ENTERPRISE LINUX 4.4 recently .What... (3 Replies)
Discussion started by: vakharia Mahesh
3 Replies

10. Solaris

Running from Shell Vs running from RC script

Hi, i have a script which need to do behave differently when run as a startup process from init.d/ rc2.d script and when run manually from shell. How do i distinguish whether my script is run by init process or by shell?? Will the command /proc/$$/psinfo | grep "myscript" work well???... (2 Replies)
Discussion started by: vickylife
2 Replies

Featured Tech Videos