Add shell_expand function

shell_expand expands shell variables in a string.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/common.h b/include/common.h
index 6987b4f16d..bfd3ce8b7b 100644
--- a/include/common.h
+++ b/include/common.h
@@ -165,6 +165,15 @@ void arch_shutdown(void);
 
 int run_shell(void);
 
+#ifdef CONFIG_SHELL_HUSH
+char *shell_expand(char *str);
+#else
+static inline char *shell_expand(char *str)
+{
+	return strdup(str);
+}
+#endif
+
 /* Force a compilation error if condition is true */
 #define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition))