TLDR
Enter a command. For example: readlink, airportd, pmset, yabai.

whence

 
A zsh builtin to indicate how a given command would be interpreted. More information: https://www.unix.com/man-page/OpenSolaris/1/whence/.
 
  • Interpret {{command}}, with expansion if defined as an alias (similar to the command -v builtin):
     
    whence "{{command}}"
     
  • Display type of {{command}}, with location if defined as a function, or binary (equivalent to the type and command -V builtins):
     
    whence -v "{{command}}"
     
  • Same as above, except display content of shell functions instead of location (equivalent to which builtin):
     
    whence -c "{{command}}"
     
  • Same as above, but show all occurrences on command path (equivalent to the where builtin):
     
    whence -ca "{{command}}"
     
  • Search only the PATH for {{command}}, ignoring builtins, aliases or shell functions (equivalent to the where command):
     
    whence -p "{{command}}"

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