1 files changed, 56 insertions, 0 deletions
diff --git a/newlib/libc/argz/envz_merge.c b/newlib/libc/argz/envz_merge.c
new file mode 100644
index 000000000..b01733017
--- /dev/null
+++ b/newlib/libc/argz/envz_merge.c
@@ -0,0 +1,56 @@
+/* Copyright (C) 2002 by  Red Hat, Incorporated. All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * is freely granted, provided that this notice is preserved.
+ */
+
+#include <errno.h>
+#include <sys/types.h>
+#include <string.h>
+#include <stdlib.h>
+#include <argz.h>
+#include <envz.h>
+
+error_t
+envz_merge (char **envz, size_t *envz_len, const char *envz2, size_t envz2_len, int override)
+{
+  char *entry = NULL;
+  char *name_str = NULL;
+  char *val_str = NULL;
+  char *name_iter = NULL;
+  int retval = 0;
+
+  while((entry = argz_next(envz2, envz2_len, entry)) && !retval)
+    {
+      if (!override)
+        {
+          name_str = strdup (entry);
+          name_iter = strchr(name_str, '=');
+          if(name_iter)
+            *name_iter = '\0';
+
+          if(!envz_entry(*envz, *envz_len, name_str))
+            {
+              retval = argz_add(envz, envz_len, entry);
+            }
+          free(name_str);
+        }
+      else
+        {
+          name_str = strdup (entry);
+          name_iter = strchr(name_str, '=');
+          if(name_iter)
+            {
+              *name_iter = '\0';
+              val_str = name_iter + 1;
+            }
+          else
+            {
+              val_str = NULL;
+            }
+
+          retval = envz_add(envz, envz_len, name_str, val_str);
+        }
+    }
+  return retval;
+}