work relatively to a root directory

Change-Id: I7cbb96bd3f699092ddfded8cc8893ec780a97d8c

6 files changed, 127 insertions, 10 deletions

diff --git a/Makefile.am b/Makefile.am
index d9ffed5..6c76395 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -13,6 +13,7 @@ COMMONSRCS = \
 WGTSRCS = \
 	wgt-config-xml.c \
 	wgt-locales.c \
+	wgt-rootdir.c \
 	wgt-strings.c
 
 AM_CFLAGS  = -Wall -Wno-pointer-sign
diff --git a/wgt-config-xml.c b/wgt-config-xml.c
index 41c2085..f92ae3a 100644
--- a/wgt-config-xml.c
+++ b/wgt-config-xml.c
@@ -14,6 +14,7 @@
  limitations under the License.
 */
 
+#include <unistd.h>
 #include <string.h>
 #include <syslog.h>
 #include <assert.h>
@@ -46,18 +47,31 @@ static xmlNodePtr first(const char *type)
 	return NULL;
 }
 
+static int scorelang(xmlNodePtr node)
+{
+	char *lang = xmlNodeGetLang(node);
+	int score = locales_score(lang);
+	xmlFree(lang);
+	return score;
+}
+
 static xmlNodePtr element_based_localisation(const char *type)
 {
-	xmlNodePtr resu;
-	char *lang;
+	xmlNodePtr resu, elem;
+	int sr, s;
 
 	resu = first(type);
-	while (resu) {
-		lang = xmlNodeGetLang(resu);
-		if (lang) {
-			xmlFree(lang);
+	if (resu) {
+		sr = scorelang(resu);
+		elem = next(resu->next, type);
+		while (resu) {
+			s = scorelang(elem);
+			if (s < sr) {
+				resu = elem;
+				sr = s;
+			}
+			elem = next(elem->next, type);
 		}
-		resu = next(resu->next, type);
 	}
 	return resu;
 }
@@ -72,8 +86,15 @@ void confixml_close()
 
 int confixml_open()
 {
+	int fd;
 	assert(!configxml);
-	configxml = xmlReadFile(_config_xml_, NULL, 0);
+	fd = widget_open_read(_config_xml_);
+	if (fd < 0) {
+		syslog(LOG_ERR, "can't open config file %s", _config_xml_);
+		return fd;
+	}
+	configxml = xmlReadFd(fd, "_config_xml_", NULL, 0);
+	close(fd);
 	if (configxml == NULL) {
 		syslog(LOG_ERR, "xml parse of config file %s failed", _config_xml_);
 		return -1;
diff --git a/wgt-locales.c b/wgt-locales.c
index d985b64..9b97cc4 100644
--- a/wgt-locales.c
+++ b/wgt-locales.c
@@ -1,3 +1,19 @@
+/*
+ Copyright 2015 IoT.bzh
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
 
 #define _GNU_SOURCE
 #include <string.h>
@@ -86,14 +102,14 @@ char *locales_locate_file(const char *filename)
 			errno = EINVAL;
 			return NULL;
 		}
-		if (!access(path, F_OK)) {
+		if (widget_has(path)) {
 			result = strdup(path);
 			if (!result)
 				errno = ENOMEM;
 			return result;
 		}
 	}
-	if (access(filename, F_OK)) {
+	if (widget_has(filename)) {
 		result = strdup(filename);
 		if (!result)
 			errno = ENOMEM;
diff --git a/wgt-rootdir.c b/wgt-rootdir.c
new file mode 100644
index 0000000..b7d9066
--- /dev/null
+++ b/wgt-rootdir.c
@@ -0,0 +1,55 @@
+/*
+ Copyright 2015 IoT.bzh
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+#define _GNU_SOURCE
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "wgt.h"
+
+
+static int rootfd = AT_FDCWD;
+
+int widget_set_rootdir(const char *pathname)
+{
+	int rfd;
+
+	if (!pathname)
+		rfd = AT_FDCWD;
+	else {
+		rfd = openat(AT_FDCWD, pathname, O_PATH|O_DIRECTORY);
+		if (rfd < 0)
+			return rfd;
+	}
+	if (rootfd >= 0)
+		close(rootfd);
+	rootfd = AT_FDCWD;
+	return 0;
+}
+
+int widget_has(const char *filename)
+{
+	return 0 == faccessat(rootfd, filename, F_OK, 0);
+}
+
+int widget_open_read(const char *filename)
+{
+	return openat(rootfd, filename, O_RDONLY);
+}
+
diff --git a/wgt-strings.c b/wgt-strings.c
index b11bbaf..a2fff39 100644
--- a/wgt-strings.c
+++ b/wgt-strings.c
@@ -1,3 +1,20 @@
+/*
+ Copyright 2015 IoT.bzh
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+#include "wgt.h"
 
 const char _config_xml_[] = "config.xml";
 const char _name_[] = "name";
diff --git a/wgt.h b/wgt.h
index 63c4bcd..d95e65b 100644
--- a/wgt.h
+++ b/wgt.h
@@ -46,6 +46,13 @@ extern int locales_score(const char *lang);
 extern char *locales_locate_file(const char *filename);
 
 /**************************************************************/
+/* from wgt-rootdir */
+
+extern int widget_set_rootdir(const char *pathname);
+extern int widget_has(const char *filename);
+extern int widget_open_read(const char *filename);
+
+/**************************************************************/
 /* from wgt-strings */
 
 extern const char _config_xml_[];