From bcf57467dd4548135db507dceded3148cd0fc941 Mon Sep 17 00:00:00 2001
From: lemoer <git@irrelefant.net>
Date: Wed, 13 May 2020 02:02:49 +0200
Subject: [PATCH] libgluonutil: implement gluonutil_get_primary_domain()
Implemented using readlink() and basename() to the selected domain in
/lib/gluon/domains/${DOMAIN}.json.
---
package/libgluonutil/src/libgluonutil.c | 41 +++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/package/libgluonutil/src/libgluonutil.c b/package/libgluonutil/src/libgluonutil.c
index c2cfa18d6..e7a88fd1b 100644
--- a/package/libgluonutil/src/libgluonutil.c
+++ b/package/libgluonutil/src/libgluonutil.c
@@ -33,6 +33,8 @@
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
/**
* Merges two JSON objects
@@ -212,6 +214,45 @@ uci_fail:
return ret;
}
+char * gluonutil_get_primary_domain(void) {
+ if (!gluonutil_has_domains())
+ return NULL;
+
+ char *domain_code = gluonutil_get_domain();
+ if (!domain_code)
+ return NULL;
+
+ const char *domain_path_fmt = "/lib/gluon/domains/%s.json";
+ char domain_path[strlen(domain_path_fmt) + strlen(domain_code)];
+ snprintf(domain_path, sizeof(domain_path), domain_path_fmt, domain_code);
+
+ char primary_domain_path[PATH_MAX+1];
+ char *primary_domain_code;
+ ssize_t len = readlink(domain_path, primary_domain_path, PATH_MAX);
+ if (len < 0) {
+ // EINVAL = file is not a symlink = the domain itself is the primary domain
+ if (errno != EINVAL) {
+ free(domain_code);
+ return NULL;
+ }
+
+ return domain_code;
+ }
+
+ free(domain_code);
+
+ primary_domain_path[len] = '\0';
+ primary_domain_code = basename(primary_domain_path);
+
+ char *ext_begin = strrchr(primary_domain_code, '.');
+ if (!ext_begin)
+ return NULL;
+
+ // strip .json from filename
+ *ext_begin = '\0';
+ return strdup(primary_domain_code);
+}
+
struct json_object * gluonutil_load_site_config(void) {
char *domain_code = NULL;
--
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