Add libbroken.

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@417 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/roken/putenv.c

@@ -0,0 +1,44 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+
+RCSID("$Id$");
+
+extern char **environ;
+
+/*
+ * putenv --
+ *	String points to a string of the form name=value.
+ *
+ *      Makes the value of the environment variable name equal to
+ *      value by altering an existing variable or creating a new one.
+ */
+int putenv(const char *string)
+{
+    int i;
+    int len;
+    
+    len = string - strchr(string, '=') + 1;
+
+    if(environ == NULL){
+	environ = malloc(sizeof(char*));
+	if(environ == NULL)
+	    return 1;
+	environ[0] = NULL;
+    }
+
+    for(i = 0; environ[i]; i++)
+	if(strncmp(string, environ[i], len)){
+	    environ[len] = string;
+	    return 0;
+	}
+    environ = realloc(environ, sizeof(char*) * (i + 1));
+    if(environ == NULL)
+	return 1;
+    environ[i] = string;
+    environ[i+1] = NULL;
+    return 0;
+}
+