# HG changeset patch
# User jbe
# Date 1435018259 -7200
# Node ID e53da349fd8f4d0cedd2b324f325598098abde9a
# Parent  35ea31e45b4319a1dcd20cc7e7555464d5c66f8d
Clarified nil/false return values of poll function and wait_nb method

diff -r 35ea31e45b43 -r e53da349fd8f moonbridge_io.c
--- a/moonbridge_io.c	Tue Jun 23 02:07:26 2015 +0200
+++ b/moonbridge_io.c	Tue Jun 23 02:10:59 2015 +0200
@@ -1464,7 +1464,9 @@
     }
   }
   if (!waitedpid) {
-    lua_pushnil(L);
+    lua_pushboolean(L, 0);
+    lua_pushliteral(L, "Process is still running");
+    return 2;
   } else {
     child->pid = 0;
     if (WIFEXITED(status)) {
@@ -1474,8 +1476,8 @@
     } else {
       luaL_error(L, "Unexpected status value returned by waitpid call");
     }
+    return 1;
   }
-  return 1;
 }
 
 static int moonbr_io_wait(lua_State *L) {
diff -r 35ea31e45b43 -r e53da349fd8f reference.txt
--- a/reference.txt	Tue Jun 23 02:07:26 2015 +0200
+++ b/reference.txt	Tue Jun 23 02:10:59 2015 +0200
@@ -318,7 +318,8 @@
 which corresponds to the respective positive signal number.
 
 The method :wait_nb() is the same as :wait(), except that it does not block but
-returns nil if the child process has not terminated yet.
+returns false (plus a notice as second return value) if the child process has
+not terminated yet.
 
 The method :wait_call() is the same as :wait() but calls waitfunc() (in an
 infinite loop) as long as the process is still running.
@@ -381,9 +382,9 @@
 which does evaluate to true. If a set is nil, it is treated as being empty.
 
 Returns true when at least one file descriptor or handle is ready for reading
-or writing respectively. Returns false (as first return value) plus a status
-message (as second return value) in case of timeout or when a signal was
-received.
+or writing respectively. Returns false (plus a notice as second return value)
+in case of timeout. Returns nil (plus a notice as second return value) if a
+signal was received during waiting.
 
 
 ### moonbridge_io.tcpconnect(hostname, port)