11 static int parse_opts(const char *str, char *ow_path, size_t pathlen, double *offset)
14 const char *start_str = str;
15 const char offset_str[] = "offset=";
21 * Skip the onewire path entry. Options begin after the first
28 /* Copy the onewire path without options */
29 strncpy(ow_path, start_str, pathlen);
30 ow_path[str - start_str] = '\0';
32 /* Get the next non-space, which is where the argument begins */
37 if (strncmp(str, offset_str, sizeof(offset_str) - 1))
39 str += sizeof(offset_str) - 1;
41 *offset = strtod(str, &endptr);
49 static int make_uncached(char *path, size_t len)
51 char p1[32], p2[32], *p = path;
53 if (strstr(path, "/uncached/"))
57 * Naively assume the "uncached" string can be put after the
60 while (*p && *p != '/')
69 strncpy(p1, path, sizeof(p1));
70 strncpy(p2, p, sizeof(p2));
71 snprintf(path, len, "%s/uncached/%s", p1, p2);
76 static int onewire_parser(char *rrd_data, const char **parser_data)
79 const char *server_addr;
82 int max_str = RRD_DATA_MAX_LEN;
85 pr_err("No parser data available\n");
89 server_addr = parser_data[0];
92 pr_err("Server address not specified\n");
96 h = OWNET_init(server_addr);
98 pr_err("Failed to connect to server %s\n", server_addr);
102 while (parser_data[i]) {
103 double offset = 0, data;
108 if (!strcmp("U", parser_data[i])) {
110 ret = snprintf(rrd_data, max_str, "U");
116 parse_opts(parser_data[i], ow_path, sizeof(ow_path), &offset);
122 pr_info("Reading data for entry %s with offset of %.2f\n",
124 ret = OWNET_read(h, ow_path, &tmp);
126 /* Skip leading white space */
128 for (i = 0; i < ret && *tmp2 == ' '; i++)
131 fail = !strncmp(tmp2, "85", 2);
134 * In case of failure, retry with uncached
135 * data. This is likely to help as it forces a
136 * retry even if the sensor is missing from
137 * the cache. We thread "85" also as a failure
138 * above, as temp sensors some times report 85
139 * under faulty conditions.
141 if (ret > 0 && !fail)
144 ret = make_uncached(ow_path, sizeof(ow_path));
145 if (retries >= 10 || ret < 0) {
146 pr_err("Failed to read entry %s: %m\n",
153 /* The data from OWNET_read appears to not be NULL terminated */
154 memcpy(buf, tmp, MIN(ret, sizeof(buf) -1));
158 data = strtod(buf, &endptr);
161 pr_err("Failed to parse data %s\n", buf);
167 ret = snprintf(rrd_data, max_str, "%f", data);
176 ret = snprintf(rrd_data, max_str, ":");
186 static struct parser_info onewire_parser_info = {
188 .parse = onewire_parser,
191 static int init_onewire_parser(void)
193 return register_parser(&onewire_parser_info);
196 struct plugin_info plugin_info = {
197 .name = "onewire_parser",
198 .init = init_onewire_parser,
199 .version = RRDD_VERSION,