From c228bf838c82cc7cda868ac75f80d8aab203ca1a Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 3 Feb 2008 03:48:45 +0100
Subject: [PATCH] allow the user of the library to override the
 confdir/searchdir

---
 file.c   | 14 +++++++++-----
 libuci.c | 29 +++++++++++++++++++++++++++++
 uci.h    | 19 ++++++++++++++++++-
 3 files changed, 56 insertions(+), 6 deletions(-)

diff --git a/file.c b/file.c
index 416422d..4e3e828 100644
--- a/file.c
+++ b/file.c
@@ -752,7 +752,7 @@ static void uci_load_history(struct uci_context *ctx, struct uci_package *p, boo
 	if (!p->confdir)
 		return;
 
-	if ((asprintf(&filename, "%s/%s", UCI_SAVEDIR, p->e.name) < 0) || !filename)
+	if ((asprintf(&filename, "%s/%s", ctx->savedir, p->e.name) < 0) || !filename)
 		UCI_THROW(ctx, UCI_ERR_MEM);
 
 	UCI_TRAP_SAVE(ctx, done);
@@ -778,8 +778,8 @@ static char *uci_config_path(struct uci_context *ctx, const char *name)
 	char *filename;
 
 	UCI_ASSERT(ctx, uci_validate_name(name));
-	filename = uci_malloc(ctx, strlen(name) + sizeof(UCI_CONFDIR) + 2);
-	sprintf(filename, UCI_CONFDIR "/%s", name);
+	filename = uci_malloc(ctx, strlen(name) + strlen(ctx->confdir) + 2);
+	sprintf(filename, "%s/%s", ctx->confdir, name);
 
 	return filename;
 }
@@ -849,7 +849,7 @@ int uci_save(struct uci_context *ctx, struct uci_package *p)
 	if (uci_list_empty(&p->history))
 		return 0;
 
-	if ((asprintf(&filename, "%s/%s", UCI_SAVEDIR, p->e.name) < 0) || !filename)
+	if ((asprintf(&filename, "%s/%s", ctx->savedir, p->e.name) < 0) || !filename)
 		UCI_THROW(ctx, UCI_ERR_MEM);
 
 	ctx->errno = 0;
@@ -984,10 +984,13 @@ int uci_list_configs(struct uci_context *ctx, char ***list)
 	glob_t globbuf;
 	int size, i;
 	char *buf;
+	char *dir;
 
 	UCI_HANDLE_ERR(ctx);
 
-	if (glob(UCI_CONFDIR "/*", GLOB_MARK, NULL, &globbuf) != 0)
+	dir = uci_malloc(ctx, strlen(ctx->confdir) + 1 + sizeof("/*"));
+	sprintf(dir, "%s/*", ctx->confdir);
+	if (glob(dir, GLOB_MARK, NULL, &globbuf) != 0)
 		UCI_THROW(ctx, UCI_ERR_NOTFOUND);
 
 	size = sizeof(char *) * (globbuf.gl_pathc + 1);
@@ -1015,6 +1018,7 @@ int uci_list_configs(struct uci_context *ctx, char ***list)
 		buf += strlen(buf) + 1;
 	}
 	*list = configs;
+	free(dir);
 
 	return 0;
 }
diff --git a/libuci.c b/libuci.c
index d4ef8d8..b86c976 100644
--- a/libuci.c
+++ b/libuci.c
@@ -25,6 +25,9 @@
 #include "uci.h"
 #include "err.h"
 
+static const char *uci_confdir = UCI_CONFDIR;
+static const char *uci_savedir = UCI_SAVEDIR;
+
 static const char *uci_errstr[] = {
 	[UCI_OK] =            "Success",
 	[UCI_ERR_MEM] =       "Out of memory",
@@ -50,6 +53,9 @@ struct uci_context *uci_alloc_context(void)
 	uci_list_init(&ctx->root);
 	ctx->flags = UCI_FLAG_STRICT;
 
+	ctx->confdir = (char *) uci_confdir;
+	ctx->savedir = (char *) uci_savedir;
+
 	return ctx;
 }
 
@@ -57,6 +63,11 @@ void uci_free_context(struct uci_context *ctx)
 {
 	struct uci_element *e, *tmp;
 
+	if (ctx->confdir != uci_confdir)
+		free(ctx->confdir);
+	if (ctx->savedir != uci_savedir)
+		free(ctx->savedir);
+
 	UCI_TRAP_SAVE(ctx, ignore);
 	uci_cleanup(ctx);
 	uci_foreach_element_safe(&ctx->root, tmp, e) {
@@ -70,6 +81,24 @@ ignore:
 	return;
 }
 
+int uci_set_confdir(struct uci_context *ctx, char *dir)
+{
+	dir = uci_strdup(ctx, dir);
+	if (ctx->confdir != uci_confdir)
+		free(ctx->confdir);
+	ctx->confdir = dir;
+	return 0;
+}
+
+int uci_set_savedir(struct uci_context *ctx, char *dir)
+{
+	dir = uci_strdup(ctx, dir);
+	if (ctx->savedir != uci_savedir)
+		free(ctx->savedir);
+	ctx->savedir = dir;
+	return 0;
+}
+
 int uci_cleanup(struct uci_context *ctx)
 {
 	UCI_HANDLE_ERR(ctx);
diff --git a/uci.h b/uci.h
index e921269..2a1b73b 100644
--- a/uci.h
+++ b/uci.h
@@ -223,11 +223,25 @@ extern int uci_commit(struct uci_context *ctx, struct uci_package **p, bool over
 
 /**
  * uci_list_configs: List available uci config files
- *
  * @ctx: uci context
  */
 extern int uci_list_configs(struct uci_context *ctx, char ***list);
 
+/** 
+ * uci_set_savedir: override the default history save directory
+ * @ctx: uci context
+ * @dir: directory name
+ */
+extern int uci_set_savedir(struct uci_context *ctx, char *dir);
+
+/** 
+ * uci_set_savedir: override the default config storage directory
+ * @ctx: uci context
+ * @dir: directory name
+ */
+extern int uci_set_confdir(struct uci_context *ctx, char *dir);
+
+
 /* UCI data structures */
 enum uci_type {
 	UCI_TYPE_HISTORY = 0,
@@ -260,6 +274,9 @@ struct uci_context
 	/* uci runtime flags */
 	enum uci_flags flags;
 
+	char *confdir;
+	char *savedir;
+
 	/* private: */
 	int errno;
 	const char *func;
-- 
2.11.0