diff --git a/common/os_calls.c b/common/os_calls.c
index 838e60ec..6b90ffc9 100644
--- a/common/os_calls.c
+++ b/common/os_calls.c
@@ -673,6 +673,20 @@ g_atoi(char* str)
   return atoi(str);
 }
 
+/*****************************************************************************/
+int
+g_pos(char* str, char* to_find)
+{
+  char* pp;
+
+  pp = strstr(str, to_find);
+  if (pp == 0)
+  {
+    return -1;
+  }
+  return (pp - str);
+}
+
 /*****************************************************************************/
 long
 g_load_library(char* in)
@@ -779,6 +793,16 @@ g_signal_child_stop(void (*func)(int))
 #endif
 }
 
+/*****************************************************************************/
+void
+g_unset_signals(void)
+{
+  sigset_t mask;
+
+  sigemptyset(&mask);
+  sigprocmask(SIG_SETMASK, &mask, NULL);
+}
+
 /*****************************************************************************/
 int
 g_fork(void)
diff --git a/common/os_calls.h b/common/os_calls.h
index af300817..de369246 100644
--- a/common/os_calls.h
+++ b/common/os_calls.h
@@ -117,6 +117,8 @@ int
 g_strncmp(char* c1, char* c2, int len);
 int
 g_atoi(char* str);
+int
+g_pos(char* str, char* to_find);
 long
 g_load_library(char* in);
 int
@@ -136,6 +138,8 @@ void
 g_signal(int sig_num, void (*func)(int));
 void
 g_signal_child_stop(void (*func)(int));
+void
+g_unset_signals(void);
 int
 g_fork(void);
 int