loadenv: allow more fine grained environment loading

This implements two new options for the loadenv command:

-s: removes (scrubs) old directory contents to be able to
    create a fresh environment from for example /dev/defaultenv
-n: no overwrite. Do not overwrite existing files. This allows
    to keep parts of the old environment.

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

1 files changed, 4 insertions, 3 deletions

diff --git a/include/environment.h b/include/environment.h
index 4184977009..096c1697c4 100644
--- a/include/environment.h
+++ b/include/environment.h
@@ -75,9 +75,6 @@ int env_push_context(void);
 /* defaults to /dev/env0 */
 extern char *default_environment_path;
 
-int envfs_load(char *filename, char *dirname);
-int envfs_save(char *filename, char *dirname);
-
 int export(const char *);
 
 struct stat;
@@ -86,6 +83,10 @@ int file_save_action(const char *, struct stat *, void *, int);
 
 #endif /* __BAREBOX__ */
 
+#define ENV_FLAG_NO_OVERWRITE	(1 << 0)
+int envfs_load(char *filename, char *dirname, unsigned flags);
+int envfs_save(char *filename, char *dirname);
+
 /* This part is used for the host and the target */
 struct action_data {
 	int fd;