--- a/mercurial/posix.py	Wed Sep 23 02:31:09 2009 -0500
+++ b/mercurial/posix.py	Sun Sep 20 22:19:18 2009 +0200
@@ -165,17 +165,11 @@
         return inst.errno != errno.ESRCH
 
 def explain_exit(code):
-    """return a 2-tuple (desc, code) describing a process's status"""
-    if os.WIFEXITED(code):
-        val = os.WEXITSTATUS(code)
-        return _("exited with status %d") % val, val
-    elif os.WIFSIGNALED(code):
-        val = os.WTERMSIG(code)
-        return _("killed by signal %d") % val, val
-    elif os.WIFSTOPPED(code):
-        val = os.WSTOPSIG(code)
-        return _("stopped by signal %d") % val, val
-    raise ValueError(_("invalid exit code"))
+    """return a 2-tuple (desc, code) describing a subprocess status
+    (codes from kill are negative - not os.system/wait encoding)"""
+    if code >= 0:
+        return _("exited with status %d") % code, code
+    return _("killed by signal %d") % -code, -code
 
 def isowner(st):
     """Return True if the stat object st is from the current user."""