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[OpenWrt-Devel,08/12] delta: add a simple duplication check when adding delta path.

Message ID 1418633213-50491-9-git-send-email-yszhou4tech@gmail.com
State Superseded
Headers show

Commit Message

Yousong Zhou Dec. 15, 2014, 8:46 a.m. UTC 
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
---
 delta.c |    2 ++
 uci.h   |    2 ++
 2 files changed, 4 insertions(+)
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Patch

diff --git a/delta.c b/delta.c
index 082633b..b56df5b 100644
--- a/delta.c
+++ b/delta.c
@@ -87,6 +87,8 @@  int uci_add_delta_path(struct uci_context *ctx, const char *dir)
 
 	UCI_HANDLE_ERR(ctx);
 	UCI_ASSERT(ctx, dir != NULL);
+	if (!strcmp(dir, ctx->savedir))
+		return -1;
 	e = uci_alloc_generic(ctx, UCI_TYPE_PATH, dir, sizeof(struct uci_element));
 	uci_list_add(&ctx->delta_path, &e->list);
 
diff --git a/uci.h b/uci.h
index 36c8890..eb7470c 100644
--- a/uci.h
+++ b/uci.h
@@ -262,6 +262,8 @@  extern int uci_set_confdir(struct uci_context *ctx, const char *dir);
  *
  * This function allows you to add directories, which contain 'overlays'
  * for the active config, that will never be committed.
+ * Caller of this API should ensure that no duplicate entries (including the
+ * default search path, e.g. `UCI_SAVEDIR') should be added.
  */
 extern int uci_add_delta_path(struct uci_context *ctx, const char *dir);