whence

-v

Produce a more verbose report.

-c

Print the results in a csh-like format. This takes precedence over -v.

-w

For each name, print name: word where word is one of alias, builtin, command, functions, reserved or none, according as name corresponds to an alias, a built-in command, an external command, a shell function, a reserved word, or is not recognised. This takes precedence over -v and -c.

-f

Causes the contents of a shell function to be displayed, which would otherwise not happen unless the -c flag were used.

-m

The arguments are taken as patterns (should be quoted), and the information is displayed for each command matching one of these patterns.