env: Fix env_get() when returning empty string using env_get_f()

The env_get_f() function returns -1 on failure. Returning 0 means that
the variable exists, and is empty string.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/env/common.c b/env/common.c
index 2aa2354..757c5f9 100644 (file)
--- a/env/common.c
+++ b/env/common.c
@@ -125,7 +125,7 @@ char *env_get(const char *name)
        }
 
        /* restricted capabilities before import */
-       if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
+       if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) >= 0)
                return (char *)(gd->env_buf);
 
        return NULL;