Clear Filters
Clear Filters

Why doesn't getenv work on MAC OS X?

11 views (last 30 days)
Brando Miranda
Brando Miranda on 11 Dec 2017
Answered: Greg on 12 Dec 2017
I was trying to get environment variables that I know exist but it returns empty arrays...is that normal?
hello =
00 empty char array
res =
00 empty char array
>>
from running
hello = getenv('hello')
res = getenv('SYSTEMROOT')
----
These are the scripts I am exactly running:
#!/bin/bash
alias matlab='/Applications/MATLAB_R2017a.app/bin/matlab -nodesktop -nosplash'
hello=hellohello
echo $hello
matlab -nodesktop -nosplash -nojvm -r "test_sh"
which runs the following:
clear;
%SLURM_JOBID = getenv('SLURM_JOBID')
%SLURM_ARRAY_TASK_ID = getenv('SLURM_ARRAY_TASK_ID')
hello = getenv('hello')
res = getenv('SYSTEMROOT')
PATH = getenv('PATH')
  2 Comments
Jos (10584)
Jos (10584) on 11 Dec 2017
How do you know they exist? Apparently Matlab cannot find them. I have no problem on my Mac.
Brando Miranda
Brando Miranda on 11 Dec 2017
what I do is run a bash script then in the bash script itself I create and echo the env variable. So it exists for sure at least in the bash script. The I run the matlab script and they are nowhere to be found:
#!/bin/bash
alias matlab='/Applications/MATLAB_R2017a.app/bin/matlab -nodesktop -nosplash'
hello=hellohello
echo $hello
matlab -nodesktop -nosplash -nojvm -r "test_sh"
which runs:
clear;
%SLURM_JOBID = getenv('SLURM_JOBID')
%SLURM_ARRAY_TASK_ID = getenv('SLURM_ARRAY_TASK_ID')
hello = getenv('hello')
res = getenv('SYSTEMROOT')
PATH = getenv('PATH')

Sign in to comment.

Answers (1)

Greg
Greg on 12 Dec 2017
One article I read indicates you need to call
export hello
To actually set hello as an environment variable. Otherwise, hello only exists as a "shell variable." I'm definitely not a MAC wizard, so I have no clue if that's correct, just a quick Google search.

Categories

Find more on Third-Party Cluster Configuration in Help Center and File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!