I need to source a tcsh script from my bash script. I have tried to do it like this:
tcsh -c "source ~/test.tcsh"
The problem with this command is that $_ is empty inside of the sourced tcsh script. Any ways to deal with that?
Thanks in advance!
The source command runs the script in the current shell. tcsh -c "source ~/test.tcsh" sources the file test.tcsh in the shell running the source command, which is an instance of tcsh, not the bash shell that runs tcsh. You aren't going to be able to execute a tcsh script in any way that affects the environment of the current bash shell. You could start a new bash shell that inherits from an instance of tcsh which was so modified, with something like
tcsh -c 'source ~/test.tcsh; bash'
but that may not be what you need. For instance,
tcsh -c 'source ~/test.tcsh; bash'
echo "OK, we're back"
will leave you in an interactive bash shell, but you won't see "OK, we're back" until after you exit that shell, which will cause tcsh to exit and return control to the original.
$_ empty in the sourced script and if there is any way to make it not empty.
source ./test.tcsh is the first command executed by the tcsh process, there is no previous command for $_ to be set to. Were you expecting it to be exported by bash?source here is irrelevant; since you are starting a new tcsh process anyway, tcsh ~/test.tcsh does the same thing, unless you are running more code than you indicate in the question.tcsh -c 'ps; source ~/test.tcsh', $_ is always empty... What kind of sorcery is this?spawn tcsh to achieve this :/