13 #define ARGSTR_LEN 32768
15 #define RRDTOOL_CMD "/usr/bin/rrdtool"
18 * Add new argument to a argument list
20 * args pointer list to arguments
21 * argcnt argument counter
22 * argstr array where the actual arguments are stored
23 * idx index in the argstr where the new argument will be appended
25 #define add_arg(args, argcnt, argstr, idx, fmt, arg...) \
26 args[argcnt] = argstr + idx; \
27 idx += sprintf(argstr + idx, fmt, ##arg); \
31 int rrdtool_draw_image(struct rrd_image *image)
33 char cmd[] = RRDTOOL_CMD;
34 // char cmd[] = "echo";
35 char *args[512], argstr[ARGSTR_LEN];
36 int idx = 0, argcnt = 0, i,j;
41 strftime(tmp, 256, "%d.%m.%Y %T (%Z) ", localtime(&t));
42 for (i = 0, j = 0; j < 256;) {
44 timestamp[j++] = '\\';
46 timestamp[j++] = tmp[i++];
53 add_arg(args, argcnt, argstr, idx, " ");
54 add_arg(args, argcnt, argstr, idx, "graph");
55 add_arg(args, argcnt, argstr, idx, "%s", image->image_filename);
57 add_arg(args, argcnt, argstr, idx, "--start");
58 add_arg(args, argcnt, argstr, idx, "%s", image->timestart);
59 add_arg(args, argcnt, argstr, idx, "--end");
60 add_arg(args, argcnt, argstr, idx, "%s", image->timeend);
61 add_arg(args, argcnt, argstr, idx, "--width");
62 add_arg(args, argcnt, argstr, idx, "%d", image->width);
63 add_arg(args, argcnt, argstr, idx, "--height");
64 add_arg(args, argcnt, argstr, idx, "%d", image->height);
65 add_arg(args, argcnt, argstr, idx, "--imgformat");
66 add_arg(args, argcnt, argstr, idx, "%s", image->imageformat);
68 for (i = 0; image->options[i]; i++) {
69 add_arg(args, argcnt, argstr, idx, "%s", image->options[i]);
72 for (i = 0; image->text[i]; i++) {
73 args[argcnt++] = image->text[i];
76 add_arg(args, argcnt, argstr, idx, "COMMENT:Last update %s\\c", timestamp);
85 int rrdtool_draw_images(struct rrd_image **image)
88 for (i = 0; image[i]; i++)
89 rrdtool_draw_image(image[i]);
94 int rrdtool_update_data(struct rrd_database *rrd)
96 char data[RRD_DATA_MAX_LEN];
97 char cmd[] = RRDTOOL_CMD;
98 // char cmd[] = "echo";
108 rrd->last_update = time(0);
112 l = sprintf(data, "N:");
115 rrd->parse(data + l, rrd->parser_data);
120 rrdtool_draw_images(rrd->images);
122 while (harvest_zombies(0));
126 static int database_exists(struct rrd_database *db)
130 /* If the filename exists, stat will return zero */
132 return !stat(db->filename, &s);
137 static int create_database(struct rrd_database *db)
139 char cmd[] = RRDTOOL_CMD;
140 // char cmd[] = "echo";
141 char *args[512], argstr[ARGSTR_LEN];
142 int idx = 0, argcnt = 0;
145 if (!db->sources || !db->archives) {
146 printf("Cannot create db \"%s\", insufficient source data\n",
151 add_arg(args, argcnt, argstr, idx, " ");
152 add_arg(args, argcnt, argstr, idx, "create");
153 add_arg(args, argcnt, argstr, idx, "%s", db->filename);
154 add_arg(args, argcnt, argstr, idx, "--step");
155 add_arg(args, argcnt, argstr, idx, "%d", db->interval);
157 for (i = 0; db->sources[i].type; i++) {
158 add_arg(args, argcnt, argstr, idx, "DS:%s:%s:%d:%f:%f",
161 db->sources[i].heartbeat,
166 for (i = 0; db->archives[i].type; i++) {
167 add_arg(args, argcnt, argstr, idx, "RRA:%s:%f:%d:%d",
168 db->archives[i].type,
170 db->archives[i].steps,
171 db->archives[i].rows);
174 child = run(cmd, args);
176 harvest_zombies(child);
181 int rrdtool_check_databases(struct rrd_database *dbs[])
183 struct rrd_database *db;
186 for (i = 0, db = dbs[i]; db; i++, db = dbs[i]) {
187 if (database_exists(db)) {
188 printf("database %s found\n", db->filename);
191 printf("Database %s missing, creating\n", db->filename);
194 printf("All done\n");