diff --git a/docs/api.md b/docs/api.md
index 9c6bf2d..fbbf5bd 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -17,6 +17,16 @@ Returns a list of current processes running, the key being the pid and the value
 Returns the name, parent process, and user ID for process *pid*.
 #### os.genenv()
 Generates an insulated environment table for running processes in.
+#### os.getuid(*pid*)
+Returns the user ID for process *pid*, or if *pid* is not specified, the current process.
+#### os.setuid(*user*)
+Only if the current user ID is "superuser": Sets the user ID for the process to *user*.
+#### os.verifyuser(*user*,*pass*)
+Returns true or false if *pass* is the correct password for *user*.
+#### os.gensalt(*len*)
+Generates *len* random printable characters and returns them.
+#### os.su(*user*,*pass*)
+Sets the user ID of the current process to *user* if *user* and *password* are verified by `os.verifyuser`.
 
 ### event
 #### event.get()