diff --git a/src/wrappers/posix/examples/forking.e b/src/wrappers/posix/examples/forking.e
index 68e0eab..a4d282b 100644
--- a/src/wrappers/posix/examples/forking.e
+++ b/src/wrappers/posix/examples/forking.e
@@ -1,18 +1,23 @@
 class FORKING
+insert 
+   MULTIPROCESSING
+   ANY
 create {ANY} make
 feature {ANY} 
 	make
 		do
-			print("Father genertaing 5 childred%N")
+			print("Parent forking 5 children%N")
 			create children.with_capacity(5);
-			5.times(agent add_child)
+            5.times(agent do children.add_last(create {MY_CHILD}) end)
+            children.for_each (agent {POSIX_PROCESS}.start)
 			-- Eventually children.for_all(agent {MY_CHILD}.wait or join...)
-			print("Done%N")
+			children.for_each(agent {POSIX_PROCESS}.wait)
+			print("All processes finished%N")
 		end
 
 	children: FAST_ARRAY[POSIX_PROCESS]
-	add_child is 
-		do 
-			children.add_last(create {MY_CHILD}.start) 
-		end
+	-- add_child is 
+	-- 	do 
+	-- 		children.add_last(create {MY_CHILD}.start) 
+	-- 	end
 end
diff --git a/src/wrappers/posix/examples/my_child.e b/src/wrappers/posix/examples/my_child.e
index f7b548f..3bc6d53 100644
--- a/src/wrappers/posix/examples/my_child.e
+++ b/src/wrappers/posix/examples/my_child.e
@@ -1,11 +1,19 @@
 class MY_CHILD
 inherit POSIX_PROCESS
-create {ANY} start
 feature {ANY} 
-	run
-		do
-			("Greeting from child process (#"| process_id.out |").%N").print_on(std_output)
-		end
+   run
+   local r: INTEGER; gen: MINIMAL_RANDOM_NUMBER_GENERATOR
+   do
+      create gen.make
+      r := gen.last_integer(10)
+      ("Greeting from child process (###(1)); faking some work for #(2) seconds%N" # process_id.out # r.out).print_on(std_output)
+      r := sleep(r.to_natural_32).to_integer_32
+      if r=0 then
+         ("(Child #(1)) Yahwn... I feel refreshed...%N" # process_id.out).print_on(std_output)
+      else
+         ("(Child #(2)) Ouch! Who awaked me after only #(2) seconds?%N" # process_id.out # &r).print_on(std_output)
+      end
+   end
 end
-		
-	
+
+
diff --git a/src/wrappers/posix/library/externals/generated/fenv_externals.e b/src/wrappers/posix/library/externals/generated/fenv_externals.e
index 1a303a5..faf1769 100644
--- a/src/wrappers/posix/library/externals/generated/fenv_externals.e
+++ b/src/wrappers/posix/library/externals/generated/fenv_externals.e
@@ -64,7 +64,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "fegetexcept"
+                       feature_name: "fegetexcept()"
                }"
                end
 
@@ -88,7 +88,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "fegetround"
+                       feature_name: "fegetround()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/grp_externals.e b/src/wrappers/posix/library/externals/generated/grp_externals.e
index 31201c2..b68f1ba 100644
--- a/src/wrappers/posix/library/externals/generated/grp_externals.e
+++ b/src/wrappers/posix/library/externals/generated/grp_externals.e
@@ -16,7 +16,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "endgrent"
+                       feature_name: "endgrent()"
                }"
                end
 
@@ -52,7 +52,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getgrent"
+                       feature_name: "getgrent()"
                }"
                end
 
@@ -160,7 +160,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "setgrent"
+                       feature_name: "setgrent()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/if_externals.e b/src/wrappers/posix/library/externals/generated/if_externals.e
index 1ec33d3..bed3ece 100644
--- a/src/wrappers/posix/library/externals/generated/if_externals.e
+++ b/src/wrappers/posix/library/externals/generated/if_externals.e
@@ -40,7 +40,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "if_nameindex"
+                       feature_name: "if_nameindex()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/locale_externals.e b/src/wrappers/posix/library/externals/generated/locale_externals.e
index b5fb6b2..48d101c 100644
--- a/src/wrappers/posix/library/externals/generated/locale_externals.e
+++ b/src/wrappers/posix/library/externals/generated/locale_externals.e
@@ -40,7 +40,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "localeconv"
+                       feature_name: "localeconv()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/mman_externals.e b/src/wrappers/posix/library/externals/generated/mman_externals.e
index 6cfa0d6..c33436a 100644
--- a/src/wrappers/posix/library/externals/generated/mman_externals.e
+++ b/src/wrappers/posix/library/externals/generated/mman_externals.e
@@ -136,7 +136,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "munlockall"
+                       feature_name: "munlockall()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/netdb_externals.e b/src/wrappers/posix/library/externals/generated/netdb_externals.e
index 8d20c37..7937c4c 100644
--- a/src/wrappers/posix/library/externals/generated/netdb_externals.e
+++ b/src/wrappers/posix/library/externals/generated/netdb_externals.e
@@ -16,7 +16,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "endhostent"
+                       feature_name: "endhostent()"
                }"
                end
 
@@ -28,7 +28,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "endnetent"
+                       feature_name: "endnetent()"
                }"
                end
 
@@ -40,7 +40,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "endnetgrent"
+                       feature_name: "endnetgrent()"
                }"
                end
 
@@ -52,7 +52,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "endprotoent"
+                       feature_name: "endprotoent()"
                }"
                end
 
@@ -64,7 +64,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "endservent"
+                       feature_name: "endservent()"
                }"
                end
 
@@ -232,7 +232,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "gethostent"
+                       feature_name: "gethostent()"
                }"
                end
 
@@ -316,7 +316,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getnetent"
+                       feature_name: "getnetent()"
                }"
                end
 
@@ -412,7 +412,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getprotoent"
+                       feature_name: "getprotoent()"
                }"
                end
 
@@ -484,7 +484,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getservent"
+                       feature_name: "getservent()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/pthread_externals.e b/src/wrappers/posix/library/externals/generated/pthread_externals.e
index 96f6c75..edb7de2 100644
--- a/src/wrappers/posix/library/externals/generated/pthread_externals.e
+++ b/src/wrappers/posix/library/externals/generated/pthread_externals.e
@@ -616,7 +616,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "pthread_getconcurrency"
+                       feature_name: "pthread_getconcurrency()"
                }"
                end
 
@@ -1192,7 +1192,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "pthread_self"
+                       feature_name: "pthread_self()"
                }"
                end
 
@@ -1372,7 +1372,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "pthread_testcancel"
+                       feature_name: "pthread_testcancel()"
                }"
                end
 
@@ -1408,7 +1408,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "pthread_yield"
+                       feature_name: "pthread_yield()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/pwd_externals.e b/src/wrappers/posix/library/externals/generated/pwd_externals.e
index 0d284ed..955fa7e 100644
--- a/src/wrappers/posix/library/externals/generated/pwd_externals.e
+++ b/src/wrappers/posix/library/externals/generated/pwd_externals.e
@@ -16,7 +16,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "endpwent"
+                       feature_name: "endpwent()"
                }"
                end
 
@@ -64,7 +64,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getpwent"
+                       feature_name: "getpwent()"
                }"
                end
 
@@ -148,7 +148,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "setpwent"
+                       feature_name: "setpwent()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/sched_externals.e b/src/wrappers/posix/library/externals/generated/sched_externals.e
index dd43708..6c61709 100644
--- a/src/wrappers/posix/library/externals/generated/sched_externals.e
+++ b/src/wrappers/posix/library/externals/generated/sched_externals.e
@@ -124,7 +124,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "sched_yield"
+                       feature_name: "sched_yield()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/signal_externals.e b/src/wrappers/posix/library/externals/generated/signal_externals.e
index 5e4a5a3..36bfd1b 100644
--- a/src/wrappers/posix/library/externals/generated/signal_externals.e
+++ b/src/wrappers/posix/library/externals/generated/signal_externals.e
@@ -198,7 +198,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "siggetmask"
+                       feature_name: "siggetmask()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/stat_externals.e b/src/wrappers/posix/library/externals/generated/stat_externals.e
index a13cee0..b41c851 100644
--- a/src/wrappers/posix/library/externals/generated/stat_externals.e
+++ b/src/wrappers/posix/library/externals/generated/stat_externals.e
@@ -116,7 +116,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getumask"
+                       feature_name: "getumask()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/syslog_externals.e b/src/wrappers/posix/library/externals/generated/syslog_externals.e
index 7caaf41..99349cf 100644
--- a/src/wrappers/posix/library/externals/generated/syslog_externals.e
+++ b/src/wrappers/posix/library/externals/generated/syslog_externals.e
@@ -16,7 +16,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "closelog"
+                       feature_name: "closelog()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/unistd_externals.e b/src/wrappers/posix/library/externals/generated/unistd_externals.e
index a557d6c..81c2f72 100644
--- a/src/wrappers/posix/library/externals/generated/unistd_externals.e
+++ b/src/wrappers/posix/library/externals/generated/unistd_externals.e
@@ -208,7 +208,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "endusershell"
+                       feature_name: "endusershell()"
                }"
                end
 
@@ -420,7 +420,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "fork"
+                       feature_name: "fork()"
                }"
                end
 
@@ -480,7 +480,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "get_current_dir_name"
+                       feature_name: "get_current_dir_name()"
                }"
                end
 
@@ -516,7 +516,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getdtablesize"
+                       feature_name: "getdtablesize()"
                }"
                end
 
@@ -528,7 +528,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getegid"
+                       feature_name: "getegid()"
                }"
                end
 
@@ -540,7 +540,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "geteuid"
+                       feature_name: "geteuid()"
                }"
                end
 
@@ -552,7 +552,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getgid"
+                       feature_name: "getgid()"
                }"
                end
 
@@ -576,7 +576,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "gethostid"
+                       feature_name: "gethostid()"
                }"
                end
 
@@ -600,7 +600,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getlogin"
+                       feature_name: "getlogin()"
                }"
                end
 
@@ -624,7 +624,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getpagesize"
+                       feature_name: "getpagesize()"
                }"
                end
 
@@ -661,7 +661,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getpgrp"
+                       feature_name: "getpgrp()"
                }"
                end
 
@@ -673,7 +673,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getpid"
+                       feature_name: "getpid()"
                }"
                end
 
@@ -685,7 +685,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getppid"
+                       feature_name: "getppid()"
                }"
                end
 
@@ -733,7 +733,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getuid"
+                       feature_name: "getuid()"
                }"
                end
 
@@ -745,7 +745,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getusershell"
+                       feature_name: "getusershell()"
                }"
                end
 
@@ -877,7 +877,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "pause"
+                       feature_name: "pause()"
                }"
                end
 
@@ -1141,7 +1141,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "setpgrp"
+                       feature_name: "setpgrp()"
                }"
                end
 
@@ -1201,7 +1201,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "setsid"
+                       feature_name: "setsid()"
                }"
                end
 
@@ -1225,7 +1225,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "setusershell"
+                       feature_name: "setusershell()"
                }"
                end
 
@@ -1285,7 +1285,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "sync"
+                       feature_name: "sync()"
                }"
                end
 
@@ -1405,7 +1405,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "ttyslot"
+                       feature_name: "ttyslot()"
                }"
                end
 
@@ -1465,7 +1465,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "vfork"
+                       feature_name: "vfork()"
                }"
                end
 
@@ -1477,7 +1477,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "vhangup"
+                       feature_name: "vhangup()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/externals/generated/utmpx_externals.e b/src/wrappers/posix/library/externals/generated/utmpx_externals.e
index 09d7410..f658e2a 100644
--- a/src/wrappers/posix/library/externals/generated/utmpx_externals.e
+++ b/src/wrappers/posix/library/externals/generated/utmpx_externals.e
@@ -16,7 +16,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "endutxent"
+                       feature_name: "endutxent()"
                }"
                end
 
@@ -52,7 +52,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "getutxent"
+                       feature_name: "getutxent()"
                }"
                end
 
@@ -100,7 +100,7 @@ feature {} -- External calls
                alias "{
                        location: "."
                        module_name: "plugin"
-                       feature_name: "setutxent"
+                       feature_name: "setutxent()"
                }"
                end
 
diff --git a/src/wrappers/posix/library/multiprocessing.e b/src/wrappers/posix/library/multiprocessing.e
index 050b612..17595c6 100644
--- a/src/wrappers/posix/library/multiprocessing.e
+++ b/src/wrappers/posix/library/multiprocessing.e
@@ -1,6 +1,8 @@
 deferred class MULTIPROCESSING
 	-- Facilities for multiprocessing
-insert UNISTD_EXTERNALS
+insert 
+   UNISTD_EXTERNALS
+   WAIT_EXTERNALS
 feature {ANY} 
 	processors_count: INTEGER
 		-- Number of processors available in the machine
@@ -17,5 +19,19 @@ feature {ANY}
 			Result:=getpid
 		end
 
+    parent_process_id: INTEGER_32
+        do 
+           Result:=getppid
+        end
+
+    wait_any_process: INTEGER_32 
+      -- Wait for any child process to terminate
+   do
+      Result := wait($last_result)
+   end
+
+   last_result: INTEGER_32
+      -- The exit status of the last terminated children
+
 end 
 
diff --git a/src/wrappers/posix/library/posix_process.e b/src/wrappers/posix/library/posix_process.e
index 907c7f5..8fb0919 100644
--- a/src/wrappers/posix/library/posix_process.e
+++ b/src/wrappers/posix/library/posix_process.e
@@ -1,49 +1,102 @@
 deferred class POSIX_PROCESS
-	-- A process as described in the POSIX standard.
-
-	-- Commands and queries of this class are loosely modelled after the
-	-- multiprocessing API of Python
-	-- (http://docs.python.org/library/multiprocessing.html).
-insert 
-	ERRNO
-	MULTIPROCESSING
-feature {ANY} 
-	child_process_id: like process_id
-		-- The process ID of the child process
-
-	is_child: BOOLEAN
-		do
-			Result := child_process_id=0
-		end
-
-	start
-		-- Create the new process and make it run 
-		-- TODO:require not_invoked_multiple_times: not 
-		do
-			child_process_id := fork
-			if     child_process_id =  0 then run; die_with_code(exit_success_code) -- executed by the child process
-			elseif child_process_id = -1 then -- there is an error
-				if errno = eagain then not_yet_implemented
-				elseif errno = enomem then not_yet_implemented
-				else not_yet_implemented -- unknown error code
-				end
-			else -- nothing, this is executed by the father process
-			end
-		end
-
-	run
-		-- The command that will be executed in the child process
-		deferred
-		end
-
-	terminate
-		-- Send SIGTERM signal to Current process
-		do
-			not_yet_implemented
-		end
-
-	is_running: BOOLEAN
-		do
-			not_yet_implemented
-		end
+   -- A process as described in the POSIX standard.
+   -- Commands and queries of this class are loosely modelled after the
+   -- multiprocessing API of Python
+   -- (http://docs.python.org/library/multiprocessing.html).
+
+insert
+   ERRNO
+   MULTIPROCESSING
+      rename 
+         wait as posix_wait
+      end
+   EXCEPTIONS
+
+feature {ANY}
+   child_process_id: like process_id
+
+   is_child: BOOLEAN
+      do
+         Result := child_process_id /= 0
+      end
+
+   is_parent: BOOLEAN
+      do
+         Result := child_process_id = -1
+      end
+
+   is_started: BOOLEAN
+      do
+         Result := child_process_id /= 0
+      end
+
+   not_started: BOOLEAN
+      do
+         Result := child_process_id = 0
+      end
+
+   start
+         -- Create the new process and make it run
+      require
+         not_started
+      local
+         err: like errno
+      do
+         child_process_id := fork
+         err := errno
+         if child_process_id = 0 then
+            -- executed by the child process
+            run
+            die_with_code(exit_success_code)
+         elseif child_process_id = -1 then
+            -- something went wrong
+            
+            -- This if clause should be an inspect but eagain and enomem are
+            -- not recognized as constants
+            if err=eagain then
+               raise_exception(No_more_memory)
+            elseif err=enomem then
+               raise_exception(No_more_memory)
+            end
+         else
+            -- executed by the father process
+            debug
+               std_error.put_line("I'm the parent process " + process_id.out)
+            end
+         end
+      end
+
+   run
+         -- The command that will be executed in the child process
+      deferred
+      end
+
+  wait
+      -- Wait until Current has terminated
+      --
+      -- TODO: add support for options of Posix's waitpid
+   local pid_t: like process_id
+   do
+      pid_t := waitpid(child_process_id,$status,0)
+   end
+
+   terminate
+         -- Send SIGTERM signal to the child process.
+      require is_parent
+      do
+         if is_parent then
+           not_yet_implemented 
+         end
+      end
+
+feature {ANY} -- Status queries
+
+   is_running: BOOLEAN
+      do
+         not_yet_implemented
+      end
+
+   status: INTEGER
+      -- 
+ 
 end -- class POSIX_PROCESS