15 #define ARGSTR_LEN 32768
17 #define RRDTOOL_CMD "/usr/bin/rrdtool"
20 * Add new argument to a argument list
22 * args pointer list to arguments
23 * argcnt argument counter
24 * argstr array where the actual arguments are stored
25 * idx index in the argstr where the new argument will be appended
27 #define add_arg(args, argcnt, argstr, idx, fmt, arg...) \
28 args[argcnt] = argstr + idx; \
29 idx += sprintf(argstr + idx, fmt, ##arg); \
33 int rrdtool_draw_image(struct rrd_image *image)
35 char cmd[] = RRDTOOL_CMD;
36 // char cmd[] = "echo";
37 char *args[512], argstr[ARGSTR_LEN];
38 int idx = 0, argcnt = 0, i,j;
43 pr_info("Drawing image %s\n", image->image_filename);
45 strftime(tmp, 256, "%d.%m.%Y %T (%Z) ", localtime(&t));
46 for (i = 0, j = 0; j < 256;) {
48 timestamp[j++] = '\\';
50 timestamp[j++] = tmp[i++];
57 add_arg(args, argcnt, argstr, idx, " ");
58 add_arg(args, argcnt, argstr, idx, "graph");
59 add_arg(args, argcnt, argstr, idx, "%s", image->image_filename);
61 add_arg(args, argcnt, argstr, idx, "--start");
62 add_arg(args, argcnt, argstr, idx, "%s", image->timestart);
63 add_arg(args, argcnt, argstr, idx, "--end");
64 add_arg(args, argcnt, argstr, idx, "%s", image->timeend);
65 add_arg(args, argcnt, argstr, idx, "--width");
66 add_arg(args, argcnt, argstr, idx, "%d", image->width);
67 add_arg(args, argcnt, argstr, idx, "--height");
68 add_arg(args, argcnt, argstr, idx, "%d", image->height);
69 add_arg(args, argcnt, argstr, idx, "--imgformat");
70 add_arg(args, argcnt, argstr, idx, "%s", image->imageformat);
72 for (i = 0; image->options[i]; i++) {
73 add_arg(args, argcnt, argstr, idx, "%s", image->options[i]);
76 for (i = 0; image->text[i]; i++) {
77 args[argcnt++] = image->text[i];
80 add_arg(args, argcnt, argstr, idx, "COMMENT:Last update %s\\c", timestamp);
89 int rrdtool_draw_images(struct rrd_image **image)
92 for (i = 0; image[i]; i++)
93 rrdtool_draw_image(image[i]);
98 static int sanitize_rrd_update_data(char *data)
100 char clean_data[RRD_DATA_MAX_LEN];
103 char *src, *end, *cln;
105 data[RRD_DATA_MAX_LEN - 1] = 0;
109 while (src < data + RRD_DATA_MAX_LEN && *src) {
116 end = skip_numbers(src);
120 end = skip_numbers(end);
123 if (*end == ':' || !*end) {
128 for (; src <= end; src++, cln++)
134 while (*end != ':' && *end)
146 strncpy(data, clean_data, RRD_DATA_MAX_LEN);
150 int rrdtool_update_data(struct rrd_database *rrd)
152 char data[RRD_DATA_MAX_LEN + 2];
153 char cmd[] = RRDTOOL_CMD;
154 // char cmd[] = "echo";
164 rrd->last_update = time(0);
168 l = sprintf(data, "N:");
171 rrd->parse(data + l, rrd->parser_data);
172 sanitize_rrd_update_data(data + l);
177 rrdtool_draw_images(rrd->images);
179 while (harvest_zombies(0));
183 static int database_exists(struct rrd_database *db)
187 /* If the filename exists, stat will return zero */
189 return !stat(db->filename, &s);
194 static int create_database(struct rrd_database *db)
196 char cmd[] = RRDTOOL_CMD;
197 // char cmd[] = "echo";
198 char *args[512], argstr[ARGSTR_LEN];
199 int idx = 0, argcnt = 0;
202 if (!db->sources || !db->archives) {
203 printf("Cannot create db \"%s\", insufficient source data\n",
208 add_arg(args, argcnt, argstr, idx, " ");
209 add_arg(args, argcnt, argstr, idx, "create");
210 add_arg(args, argcnt, argstr, idx, "%s", db->filename);
211 add_arg(args, argcnt, argstr, idx, "--step");
212 add_arg(args, argcnt, argstr, idx, "%d", db->interval);
214 for (i = 0; db->sources[i].type; i++) {
215 add_arg(args, argcnt, argstr, idx, "DS:%s:%s:%d:%f:%f",
218 db->sources[i].heartbeat,
223 for (i = 0; db->archives[i].type; i++) {
224 add_arg(args, argcnt, argstr, idx, "RRA:%s:%f:%d:%d",
225 db->archives[i].type,
227 db->archives[i].steps,
228 db->archives[i].rows);
231 child = run(cmd, args);
233 harvest_zombies(child);
238 int rrdtool_check_databases(struct rrd_database *dbs[])
240 struct rrd_database *db;
243 for (i = 0, db = dbs[i]; db; i++, db = dbs[i]) {
244 if (database_exists(db)) {
245 printf("database %s found\n", db->filename);
248 printf("Database %s missing, creating\n", db->filename);
251 printf("All done\n");