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+/*
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+ Copyright (c) 2016, Matthias Schiffer <mschiffer@universe-factory.net>
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+ All rights reserved.
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+
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+ Redistribution and use in source and binary forms, with or without
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+ modification, are permitted provided that the following conditions are met:
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+
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+ 1. Redistributions of source code must retain the above copyright notice,
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+ this list of conditions and the following disclaimer.
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+ 2. Redistributions in binary form must reproduce the above copyright notice,
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+ this list of conditions and the following disclaimer in the documentation
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+ and/or other materials provided with the distribution.
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+
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+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+*/
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+
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+
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+#include "libgluonutil.h"
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+
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+#include <json-c/json.h>
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+
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+#include <stdio.h>
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+#include <string.h>
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+#include <stdlib.h>
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+
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+
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+char * gluonutil_read_line(const char *filename) {
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+ FILE *f = fopen(filename, "r");
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+ if (!f)
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+ return NULL;
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+
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+ char *line = NULL;
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+ size_t len = 0;
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+
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+ ssize_t r = getline(&line, &len, f);
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+
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+ fclose(f);
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+
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+ if (r >= 0) {
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+ len = strlen(line);
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+
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+ if (len && line[len-1] == '\n')
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+ line[len-1] = 0;
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+ }
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+ else {
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+ free(line);
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+ line = NULL;
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+ }
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+
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+ return line;
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+}
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+
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+char * gluonutil_get_sysconfig(const char *key) {
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+ if (strchr(key, '/'))
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+ return NULL;
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+
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+ const char prefix[] = "/lib/gluon/core/sysconfig/";
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+ char path[strlen(prefix) + strlen(key) + 1];
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+ snprintf(path, sizeof(path), "%s%s", prefix, key);
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+
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+ return gluonutil_read_line(path);
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+}
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+
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+char * gluonutil_get_node_id(void) {
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+ char *node_id = gluonutil_get_sysconfig("primary_mac");
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+ if (!node_id)
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+ return NULL;
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+
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+ char *in = node_id, *out = node_id;
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+
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+ do {
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+ if (*in != ':')
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+ *out++ = *in;
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+ } while (*in++);
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+
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+ return node_id;
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+}
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+
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+char * gluonutil_get_interface_address(const char *ifname) {
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+ const char *format = "/sys/class/net/%s/address";
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+ char path[strlen(format) + strlen(ifname) - 1];
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+
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+ snprintf(path, sizeof(path), format, ifname);
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+
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+ return gluonutil_read_line(path);
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+}
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+
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+
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+
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+struct json_object * gluonutil_wrap_string(const char *str) {
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+ if (!str)
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+ return NULL;
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+
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+ return json_object_new_string(str);
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+}
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+
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+struct json_object * gluonutil_wrap_and_free_string(char *str) {
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+ struct json_object *ret = gluonutil_wrap_string(str);
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+ free(str);
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+ return ret;
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+}
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+
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+struct json_object * gluonutil_load_site_config(void) {
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+ return json_object_from_file("/lib/gluon/site.json");
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+}
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