12 #define ARGSTR_LEN 32768
14 #define RRDTOOL_CMD "/usr/bin/rrdtool"
17 * Add new argument to a argument list
19 * args pointer list to arguments
20 * argcnt argument counter
21 * argstr array where the actual arguments are stored
22 * idx index in the argstr where the new argument will be appended
24 #define add_arg(args, argcnt, argstr, idx, fmt, arg...) \
25 args[argcnt] = argstr + idx; \
26 idx += sprintf(argstr + idx, fmt, ##arg); \
30 int rrdtool_draw_image(struct rrd_image *image)
32 char cmd[] = RRDTOOL_CMD;
33 // char cmd[] = "echo";
34 char *args[512], argstr[ARGSTR_LEN];
35 int idx = 0, argcnt = 0, i,j;
40 strftime(tmp, 256, "%d.%m.%Y %T (%Z) ", localtime(&t));
41 for (i = 0, j = 0; j < 256;) {
43 timestamp[j++] = '\\';
45 timestamp[j++] = tmp[i++];
52 add_arg(args, argcnt, argstr, idx, " ");
53 add_arg(args, argcnt, argstr, idx, "graph");
54 add_arg(args, argcnt, argstr, idx, "%s", image->image_filename);
56 add_arg(args, argcnt, argstr, idx, "--start");
57 add_arg(args, argcnt, argstr, idx, "%s", image->timestart);
58 add_arg(args, argcnt, argstr, idx, "--end");
59 add_arg(args, argcnt, argstr, idx, "%s", image->timeend);
60 add_arg(args, argcnt, argstr, idx, "--width");
61 add_arg(args, argcnt, argstr, idx, "%d", image->width);
62 add_arg(args, argcnt, argstr, idx, "--height");
63 add_arg(args, argcnt, argstr, idx, "%d", image->height);
64 add_arg(args, argcnt, argstr, idx, "--imgformat");
65 add_arg(args, argcnt, argstr, idx, "%s", image->imageformat);
67 for (i = 0; image->options[i]; i++) {
68 add_arg(args, argcnt, argstr, idx, "%s", image->options[i]);
71 for (i = 0; image->text[i]; i++) {
72 args[argcnt++] = image->text[i];
75 add_arg(args, argcnt, argstr, idx, "COMMENT:Last update %s\\c", timestamp);
84 int rrdtool_draw_images(struct rrd_image **image)
87 for (i = 0; image[i]; i++)
88 rrdtool_draw_image(image[i]);
93 int rrdtool_update_data(struct rrd_database *rrd)
96 char cmd[] = RRDTOOL_CMD;
97 // char cmd[] = "echo";
107 rrd->last_update = time(0);
111 l = sprintf(data, "N:");
114 rrd->parse(data + l);
119 rrdtool_draw_images(rrd->images);
121 while (harvest_zombies(0));
125 static int database_exists(struct rrd_database *db)
129 /* If the filename exists, stat will return zero */
131 return !stat(db->filename, &s);
136 static int create_database(struct rrd_database *db)
138 char cmd[] = RRDTOOL_CMD;
139 // char cmd[] = "echo";
140 char *args[512], argstr[ARGSTR_LEN];
141 int idx = 0, argcnt = 0;
144 if (!db->sources || !db->archives) {
145 printf("Cannot create db \"%s\", insufficient source data\n",
150 add_arg(args, argcnt, argstr, idx, " ");
151 add_arg(args, argcnt, argstr, idx, "create");
152 add_arg(args, argcnt, argstr, idx, "%s", db->filename);
153 add_arg(args, argcnt, argstr, idx, "--step");
154 add_arg(args, argcnt, argstr, idx, "%d", db->interval);
156 for (i = 0; db->sources[i].type; i++) {
157 add_arg(args, argcnt, argstr, idx, "DS:%s:%s:%d:%f:%f",
160 db->sources[i].heartbeat,
165 for (i = 0; db->archives[i].type; i++) {
166 add_arg(args, argcnt, argstr, idx, "RRA:%s:%f:%d:%d",
167 db->archives[i].type,
169 db->archives[i].steps,
170 db->archives[i].rows);
173 child = run(cmd, args);
175 harvest_zombies(child);
180 int rrdtool_check_databases(struct rrd_database *dbs[])
182 struct rrd_database *db;
185 for (i = 0, db = dbs[i]; db; i++, db = dbs[i]) {
186 if (database_exists(db)) {
187 printf("database %s found\n", db->filename);
190 printf("Database %s missing, creating\n", db->filename);
193 printf("All done\n");