Implement Command which
Objective
Have a command, which, which does the following
help page
BusyBox v1.24.1 (2016-02-19 11:20:55 SGT) multi-call binary.
Usage: which [COMMAND]...
Locate a COMMAND
Done
- When the command complies with the above interface
- When it can be compiled as an applet into the slimbox binary
Demo
Show each command as an 'applet', and that it conforms to the interface:
$ slimbox which --help
BusyBox v1.24.1 (2016-02-19 11:20:55 SGT) multi-call binary.
Usage: which [COMMAND]...
...
Show that when called as a symlink, the same happens
$ ln -s slimbox which
$ ./which --help
BusyBox v1.24.1 (2016-02-19 11:20:55 SGT) multi-call binary.
Usage: which [COMMAND]...
...