WaitNoWait = Interface("WaitNoWait", 
                "Wait or don't wait", None, StrictBoolean)

__declare__("""
def makedirs(name: String, mode: Int)
def removedirs(name: String)
def renames(old: String, new: String)
def execl(file: String, args: Sequence(String))
def execle(file: String, args: Sequence(String))
def execlp(file: String, args: Sequence(String))
def execlpe(file: String, args: Sequence(String))
def execvpe(file: String, args: Sequence(String), env: Mapping)
def _Environ.__init__(self, environ: Mapping)
def _Environ.__setitem__(self, key: String, item: String)
def _Environ.__getitem__(self, key: String) -> String
def _Environ.__delitem__(self, key: String)
def _Environ.has_key(self, key: String) -> StrictBoolean
def _Environ.get(self, key: String, failObj) -> String
def _Environ.update(self, dict: Mapping)
def getenv(key: String, default ) -> String
def spawnv(mode: WaitNoWait, file: String, args: Sequence(String) ) -> rc: Int
def spawnve(mode: WaitNoWait, file: String, 
                    args: Sequence, env: Mapping(String, String) ) -> rc: Int
def spawnvp(mode: WaitNoWait, file: String, args: Sequence)-> rc: Int
def spawnvpe(mode: WaitNoWait, file: String, 
                    args: Sequence, env: Mapping)-> rc: Int
def spawnl(mode: WaitNoWait, file: String, args: Sequence)-> rc: Int
def spawnlp(mode: WaitNoWait, file: String, args: Sequence)-> rc: Int
def spawnle(mode: WaitNoWait, file: String, 
                env: Mapping, args: Sequence)-> rc: Int
def spawnlpe(mode: WaitNoWait, file: String, 
                env: Mapping, args: Sequence)-> rc: Int
def popen2(cmd: String, mode: String, bufsize, Int) 
                    -> (stdin: ReadStream, stdout: WriteStream)
def popen3(cmd: String, mode: String, bufsize, Int) 
            -> (stdin: ReadStream, stdout: WriteStream, stderr: WriteStream)
def popen4(cmd: String, mode: String, bufsize, Int) 
                    -> (stdin: ReadStream, stdout: WriteStream)
""")

# spawn*'s signatures are a little funny. The comments in the code
# seem just wrong.

# XXX many of these will not be checked on platforms where the
# functions are actually built-in to the C library.