doc: dfu: add DFU to HTML documentation

[oweals/u-boot.git] / include / env.h

diff --git a/include/env.h b/include/env.h
index a74a261337e640024f1a6ebac5eb4d9014a37d2b..d6c2d751d62b6cc7eb3bbf9a108b36be14a8a486 100644 (file)
--- a/include/env.h
+++ b/include/env.h
@@ -9,6 +9,7 @@
 #ifndef __ENV_H
 #define __ENV_H
 
+#include <compiler.h>
 #include <stdbool.h>
 #include <linux/types.h>
 
@@ -112,6 +113,16 @@ int env_match(unsigned char *name, int index);
  */
 char *env_get(const char *varname);
 
+/*
+ * Like env_get, but prints an error if envvar isn't defined in the
+ * environment.  It always returns what env_get does, so it can be used in
+ * place of env_get without changing error handling otherwise.
+ *
+ * @varname:   Variable to look up
+ * @return value of variable, or NULL if not found
+ */
+char *from_env(const char *envvar);
+
 /**
  * env_get_f() - Look up the value of an environment variable (early)
  *