1 files changed, 35 insertions, 2 deletions
diff --git a/kernel/source/application.cpp b/kernel/source/application.cpp
index 6df49cd..cd76bd9 100644
--- a/kernel/source/application.cpp
+++ b/kernel/source/application.cpp
@@ -90,9 +90,42 @@ namespace hilbert::kernel::application {
     delete memory; //:p
   }
 
-  void process::add_environment_variable(
+  process::string_pair *process::find_environment_variable(
+    const utility::string &name) {
+
+    for (auto *n = environment_variables.first; n; n = n->next)
+      if (n->value.a == name)
+        return &n->value;
+
+    return 0;
+
+  }
+
+  void process::set_environment_variable(
     utility::string &&name, utility::string &&value) {
-    environment_variables.insert_end({.a = name, .b = value});
+
+    auto *sp = find_environment_variable(name);
+    if (sp)
+      sp->b = utility::move(value);
+    else
+      environment_variables.insert_end({
+        .a = utility::move(name),
+        .b = utility::move(value)
+      });
+
+  }
+
+  void process::set_environment_variable(
+    const utility::string &name, const utility::string &value) {
+
+    auto *sp = find_environment_variable(name);
+    if (sp)
+      sp->b = value;
+    else
+      environment_variables.insert_end({
+        .a = name, .b = value
+      });
+
   }
 
   utility::string *process::get_environment_variable(