The standard library Posix_Process api is a sub-API of the Posixlib api.
The above information is manually maintained and may contain errors.
api { eqtype Process_Id; unt_to_pid : one_word_unt::Unt -> Process_Id; pid_to_unt : Process_Id -> one_word_unt::Unt; fork : Void -> Null_Or(Process_Id ); exec : (String , List(String )) -> X; exece : (String , List(String ) , List(String )) -> X; execp : (String , List(String )) -> X; Waitpid_Arg = W_ANY_CHILD | W_CHILD Process_Id | W_GROUP Process_Id | W_SAME_GROUP; Exit_Status = W_EXITED | W_EXITSTATUS one_byte_unt::Unt | W_SIGNALED interprocess_signals::Signal | W_STOPPED interprocess_signals::Signal; package w : api { eqtype Flags; to_unt : Flags -> one_word_unt::Unt; from_unt : one_word_unt::Unt -> Flags; all : Flags; flags : List(Flags ) -> Flags; intersect : List(Flags ) -> Flags; clear : (Flags , Flags) -> Flags; all_set : (Flags , Flags) -> Bool; any_set : (Flags , Flags) -> Bool; untraced : Flags;};; wait : Void -> (Process_Id , Exit_Status); waitpid : (Waitpid_Arg , List(w::Flags )) -> (Process_Id , Exit_Status); waitpid_without_blocking : (Waitpid_Arg , List(w::Flags )) -> Null_Or(((Process_Id , Exit_Status)) ); exit : one_byte_unt::Unt -> X; Killpid_Arg = K_GROUP Process_Id | K_PROC Process_Id | K_SAME_GROUP; kill : (Killpid_Arg , interprocess_signals::Signal) -> Void; alarm : time::Time -> time::Time; pause : Void -> Void; sleep : time::Time -> time::Time; osval : String -> Int; osval__syscall : String -> Int; set__osval__ref : ({fun_name:String, io_call:String -> Int, lib_name:String} -> String -> Int) -> Void; sysconf__syscall : String -> one_word_unt::Unt; set__sysconf__ref : ( {fun_name:String, io_call:String -> one_word_unt::Unt, lib_name:String} -> String -> one_word_unt::Unt ) -> Void; waitpid__syscall : (Int , one_word_unt::Unt) -> (Int , Int , Int); set__waitpid__ref : ( {fun_name:String, io_call:(Int , one_word_unt::Unt) -> (Int , Int , Int), lib_name:String} -> (Int , one_word_unt::Unt) -> (Int , Int , Int) ) -> Void; kill__syscall : (Int , Int) -> Void; set__kill__ref : ({fun_name:String, io_call:(Int , Int) -> Void, lib_name:String} -> (Int , Int) -> Void) -> Void;};