3
Is there a way for a bash script to detect if it's being run via the #!/usr/bin/env shebang?
Some magic bash foo that would let me write:
#!/bin/bash
...
if [ __INVOKED_VIA_USR_BIN_ENV__ ]; then
...
aefxx
Posted 2014-05-24T23:25:02.453
Reputation: 133
3
The last thing that env (from coreutils) does is
execvp (argv[optind], &argv[optind]);
This means that env gets replaced with the other program, so you can't detect who started it. You can find out more in the execvp man page.
Cristian Ciupitu
Posted 2014-05-24T23:25:02.453
Reputation: 4 515
Thanks for the links, Cristian. Seems like this is the final answer. – aefxx – 2014-05-25T00:55:16.617
Do you have access to the places where
envis called? According to the man page the tool allows you to set environment variables in the call. – Marcus Rickert – 2014-05-24T23:34:13.340No, not in this case. Unfortunately I cannot tinker with
envas it is used in shebangs I do not control. Messing with the shebang would be reverted whenever the script updates itself. – aefxx – 2014-05-25T00:01:14.580