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