Which

Do you mean:

• The which command, /which file [file ...], which uses the load-file machinery and normally displays resolved filenames without executing their script text?
• The which function, $which(file [directory-search-path]), which returns the first existing canonical path or an empty string on failure?

The command opens and reads files, with the shared loader's encoding and compression behavior; some loader options can change its default mode. The function only searches for an existing path and does not open, decompress, or execute the result. Their argument parsing and compressed-file handling differ.

Both use load_path by default. The function can instead take an explicit colon-separated search path; it does not search the shell's executable PATH automatically or prove that a match is readable or executable. See the individual pages for path expansion, options, errors, and filenames containing spaces.

Source references

• source/commands.c: shared load handler and path-display loader.
• source/functions.c: which() filename and search-path arguments.
• source/ircaux.c: filesystem path search and normalization helpers.