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)
36 char cmd[] = RRDTOOL_CMD;
37 // char cmd[] = "echo";
38 char *args[512], argstr[ARGSTR_LEN];
39 int idx = 0, argcnt = 0, i,j;
45 pr_info("Drawing image %s\n", image->image_filename);
48 strncat(tmpfile, image->image_filename, sizeof(tmp) - strlen(tmp) - 1);
49 strncat(tmpfile, ".tmp", sizeof(tmp) - strlen(tmp) - 1);
51 strftime(tmp, 256, "%d.%m.%Y %T (%Z) ", localtime(&t));
52 for (i = 0, j = 0; j < 256;) {
54 timestamp[j++] = '\\';
56 timestamp[j++] = tmp[i++];
63 add_arg(args, argcnt, argstr, idx, " ");
64 add_arg(args, argcnt, argstr, idx, "graph");
65 add_arg(args, argcnt, argstr, idx, "%s", tmpfile);
67 add_arg(args, argcnt, argstr, idx, "--start");
68 add_arg(args, argcnt, argstr, idx, "%s", image->timestart);
69 add_arg(args, argcnt, argstr, idx, "--end");
70 add_arg(args, argcnt, argstr, idx, "%s", image->timeend);
71 add_arg(args, argcnt, argstr, idx, "--width");
72 add_arg(args, argcnt, argstr, idx, "%d", image->width);
73 add_arg(args, argcnt, argstr, idx, "--height");
74 add_arg(args, argcnt, argstr, idx, "%d", image->height);
75 add_arg(args, argcnt, argstr, idx, "--imgformat");
76 add_arg(args, argcnt, argstr, idx, "%s", image->imageformat);
78 for (i = 0; image->options[i]; i++) {
79 add_arg(args, argcnt, argstr, idx, "%s", image->options[i]);
82 for (i = 0; image->text[i]; i++) {
83 args[argcnt++] = image->text[i];
86 add_arg(args, argcnt, argstr, idx, "COMMENT:Last update %s\\c", timestamp);
93 rename(tmpfile, image->image_filename);
98 int rrdtool_draw_images(struct rrd_image **image)
101 for (i = 0; image[i]; i++)
102 rrdtool_draw_image(image[i]);
107 static int sanitize_rrd_update_data(char *data)
109 char clean_data[RRD_DATA_MAX_LEN];
112 char *src, *end, *cln;
114 data[RRD_DATA_MAX_LEN - 1] = 0;
118 while (src < data + RRD_DATA_MAX_LEN && *src) {
125 end = skip_numbers(src);
129 end = skip_numbers(end);
132 if (*end == ':' || !*end) {
137 for (; src <= end; src++, cln++)
143 while (*end != ':' && *end)
155 strncpy(data, clean_data, RRD_DATA_MAX_LEN);
159 int rrdtool_update_data(struct rrd_database *rrd)
162 char data[RRD_DATA_MAX_LEN + 2];
163 char cmd[] = RRDTOOL_CMD;
164 // char cmd[] = "echo";
174 rrd->last_update = time(0);
178 l = sprintf(data, "N:");
181 rrd->parse(data + l, rrd->parser_data);
182 sanitize_rrd_update_data(data + l);
183 pid = run(cmd, cmdline);
184 harvest_zombies(pid);
188 rrdtool_draw_images(rrd->images);
190 while (harvest_zombies(0));
194 static int database_exists(struct rrd_database *db)
198 /* If the filename exists, stat will return zero */
200 return !stat(db->filename, &s);
205 static int create_database(struct rrd_database *db)
207 char cmd[] = RRDTOOL_CMD;
208 // char cmd[] = "echo";
209 char *args[512], argstr[ARGSTR_LEN];
210 int idx = 0, argcnt = 0;
213 if (!db->sources || !db->archives) {
214 printf("Cannot create db \"%s\", insufficient source data\n",
219 add_arg(args, argcnt, argstr, idx, " ");
220 add_arg(args, argcnt, argstr, idx, "create");
221 add_arg(args, argcnt, argstr, idx, "%s", db->filename);
222 add_arg(args, argcnt, argstr, idx, "--step");
223 add_arg(args, argcnt, argstr, idx, "%d", db->interval);
225 for (i = 0; db->sources[i].type; i++) {
226 add_arg(args, argcnt, argstr, idx, "DS:%s:%s:%d:%f:%f",
229 db->sources[i].heartbeat,
234 for (i = 0; db->archives[i].type; i++) {
235 add_arg(args, argcnt, argstr, idx, "RRA:%s:%f:%d:%d",
236 db->archives[i].type,
238 db->archives[i].steps,
239 db->archives[i].rows);
242 child = run(cmd, args);
244 harvest_zombies(child);
249 int rrdtool_create_missing_databases(struct rrd_database *dbs[])
251 struct rrd_database *db;
254 for (i = 0, db = dbs[i]; db; i++, db = dbs[i]) {
255 if (database_exists(db)) {
256 printf("database %s found\n", db->filename);
259 printf("Database %s missing, creating\n", db->filename);
262 printf("All done\n");