115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
/*
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Copyright (c) 2016, Matthias Schiffer <mschiffer@universe-factory.net>
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All rights reserved.
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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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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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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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#include "libgluonutil.h"
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#include <json-c/json.h>
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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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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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char *line = NULL;
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size_t len = 0;
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ssize_t r = getline(&line, &len, f);
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fclose(f);
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if (r >= 0) {
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len = strlen(line);
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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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return line;
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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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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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return gluonutil_read_line(path);
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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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char *in = node_id, *out = node_id;
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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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return node_id;
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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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snprintf(path, sizeof(path), format, ifname);
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return gluonutil_read_line(path);
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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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return json_object_new_string(str);
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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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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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