How to get the program name in a fish shell script?

Question

In bash, as in ruby, the program name is given by $0. What is it in fish? I can do the following if I have to:

set PROGRAM (ps --no-header -o args -p %self | egrep -o '\S+')[2]

But I'm sure the program name must be already available somewhere. I could also set the program name in variable at the stub of each program, but that has maintenance problems.

Answer 1

To get the same result as your command, it is the script filename you are looking for.

This information is not stored in a variable, but you get this by querying status.

basename (status -f)      # The name of the file
status -f                 # The full path of the file

More information: http://fishshell.com/docs/2.0/commands.html#status

Answer 2

For fish use $_ for program name.

Answer 3

fish 3.x

status current-command

See Deprecations section of the 3.0 documentation.

fish 2.x

Use $_ for program name.

See Programmable title section of the 2.0 documentation.

Answer 4

In the docs you can see that as of version 3.4.1 you can simply use

echo (status basename)