1 /**
2 * collectd - src/collectdctl.c
3 * Copyright (C) 2010 Håkon J Dugstad Johnsen
4 * Copyright (C) 2010 Sebastian Harl
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Håkon J Dugstad Johnsen <hakon-dugstad.johnsen at telenor.com>
21 * Sebastian "tokkee" Harl <sh@tokkee.org>
22 **/
24 #if HAVE_CONFIG_H
25 # include "config.h"
26 #endif
28 #include "libcollectdclient/client.h"
30 #include <assert.h>
32 #include <errno.h>
34 #include <getopt.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
40 #include <unistd.h>
42 #define DEFAULT_SOCK LOCALSTATEDIR"/run/"PACKAGE_NAME"-unixsock"
44 extern char *optarg;
45 extern int optind;
47 static void exit_usage (const char *name, int status) {
48 fprintf ((status == 0) ? stdout : stderr,
49 "Usage: %s [options] <command> [cmd options]\n\n"
51 "Available options:\n"
52 " -s Path to collectd's UNIX socket.\n"
53 " Default: "DEFAULT_SOCK"\n"
55 "\n -h Display this help and exit.\n"
57 "\nAvailable commands:\n\n"
59 " * getval <identifier>\n"
60 " * flush [timeout=<seconds>] [plugin=<name>] [identifier=<id>]\n"
62 "\nIdentifiers:\n\n"
64 "An identifier has the following format:\n\n"
66 " [<hostname>/]<plugin>[-<plugin_instance>]/<type>[-<type_instance>]\n\n"
68 "Hostname defaults to the local hostname if omitted (e.g., uptime/uptime).\n"
69 "No error is returned if the specified identifier does not exist.\n"
71 "\nExample:\n\n"
73 " collectdctl flush plugin=rrdtool identifie=somehost/cpu-0/cpu-wait\n\n"
75 "Flushes all CPU wait RRD values of the first CPU of the local host.\n"
76 "I.e., writes all pending RRD updates of that data-source to disk.\n"
78 "\n"PACKAGE" "VERSION", http://collectd.org/\n"
79 "by Florian octo Forster <octo@verplant.org>\n"
80 "for contributions see `AUTHORS'\n"
81 , name);
82 exit (status);
83 }
85 /* Count the number of occurrences of the character 'chr'
86 * in the specified string. */
87 static int count_chars (const char *str, char chr) {
88 int count = 0;
90 while (*str != '\0') {
91 if (*str == chr) {
92 count++;
93 }
94 str++;
95 }
97 return count;
98 } /* count_chars */
100 static int parse_identifier (lcc_connection_t *c,
101 const char *value, lcc_identifier_t *ident)
102 {
103 char hostname[1024];
104 char ident_str[1024] = "";
105 int n_slashes;
107 int status;
109 n_slashes = count_chars (value, '/');
110 if (n_slashes == 1) {
111 /* The user has omitted the hostname part of the identifier
112 * (there is only one '/' in the identifier)
113 * Let's add the local hostname */
114 if (gethostname (hostname, sizeof (hostname)) != 0) {
115 fprintf (stderr, "ERROR: Failed to get local hostname: %s",
116 strerror (errno));
117 return (-1);
118 }
119 hostname[sizeof (hostname) - 1] = '\0';
121 snprintf (ident_str, sizeof (ident_str), "%s/%s", hostname, value);
122 ident_str[sizeof(ident_str) - 1] = '\0';
123 }
124 else {
125 strncpy (ident_str, value, sizeof (ident_str));
126 ident_str[sizeof (ident_str) - 1] = '\0';
127 }
129 status = lcc_string_to_identifier (c, ident, ident_str);
130 if (status != 0) {
131 fprintf (stderr, "ERROR: Failed to parse identifier ``%s'': %s.\n",
132 ident_str, lcc_strerror(c));
133 return (-1);
134 }
135 return (0);
136 } /* parse_identifier */
138 static int getval (lcc_connection_t *c, int argc, char **argv)
139 {
140 lcc_identifier_t ident;
142 size_t ret_values_num = 0;
143 gauge_t *ret_values = NULL;
144 char **ret_values_names = NULL;
146 int status;
147 size_t i;
149 assert (strcasecmp (argv[0], "getval") == 0);
151 if (argc != 2) {
152 fprintf (stderr, "ERROR: getval: Missing identifier.\n");
153 return (-1);
154 }
156 memset (&ident, 0, sizeof (ident));
157 status = parse_identifier (c, argv[1], &ident);
158 if (status != 0)
159 return (status);
161 #define BAIL_OUT(s) \
162 do { \
163 if (ret_values != NULL) \
164 free (ret_values); \
165 if (ret_values_names != NULL) { \
166 for (i = 0; i < ret_values_num; ++i) \
167 free (ret_values_names[i]); \
168 free (ret_values_names); \
169 } \
170 ret_values_num = 0; \
171 return (s); \
172 } while (0)
174 status = lcc_getval (c, &ident,
175 &ret_values_num, &ret_values, &ret_values_names);
176 if (status != 0)
177 BAIL_OUT (-1);
179 for (i = 0; i < ret_values_num; ++i)
180 printf ("%s=%e\n", ret_values_names[i], ret_values[i]);
181 BAIL_OUT (0);
182 } /* getval */
184 static int flush (lcc_connection_t *c, int argc, char **argv)
185 {
186 lcc_identifier_t ident;
187 lcc_identifier_t *identp = NULL;
189 char *plugin = NULL;
190 int timeout = -1;
192 int status;
193 int i;
195 assert (strcasecmp (argv[0], "flush") == 0);
197 for (i = 1; i < argc; ++i) {
198 char *key, *value;
200 key = argv[i];
201 value = strchr (argv[i], (int)'=');
203 if (! value) {
204 fprintf (stderr, "ERROR: flush: Invalid option ``%s''.\n", argv[i]);
205 return (-1);
206 }
208 *value = '\0';
209 ++value;
211 if (strcasecmp (key, "timeout") == 0) {
212 char *endptr = NULL;
214 timeout = strtol (value, &endptr, 0);
216 if (endptr == value) {
217 fprintf (stderr, "ERROR: Failed to parse timeout as number: %s.\n",
218 value);
219 return (-1);
220 }
221 else if ((endptr != NULL) && (*endptr != '\0')) {
222 fprintf (stderr, "WARNING: Ignoring trailing garbage after timeout: "
223 "%s.\n", endptr);
224 }
225 }
226 else if (strcasecmp (key, "plugin") == 0) {
227 plugin = value;
228 }
229 else if (strcasecmp (key, "identifier") == 0) {
230 int status;
232 memset (&ident, 0, sizeof (ident));
233 status = parse_identifier (c, value, &ident);
234 if (status != 0)
235 return (status);
236 identp = &ident;
237 }
238 }
240 status = lcc_flush (c, plugin, identp, timeout);
241 if (status != 0) {
242 fprintf (stderr, "ERROR: Flushing failed: %s.\n",
243 lcc_strerror (c));
244 return (-1);
245 }
247 return 0;
248 } /* flush */
250 int main (int argc, char **argv) {
251 char address[1024] = "unix:"DEFAULT_SOCK;
253 lcc_connection_t *c;
255 int status;
257 while (42) {
258 int c;
260 c = getopt (argc, argv, "s:h");
262 if (c == -1)
263 break;
265 switch (c) {
266 case 's':
267 snprintf (address, sizeof (address), "unix:%s", optarg);
268 address[sizeof (address) - 1] = '\0';
269 break;
270 case 'h':
271 exit_usage (argv[0], 0);
272 break;
273 default:
274 exit_usage (argv[0], 1);
275 }
276 }
278 if (optind >= argc) {
279 fprintf (stderr, "%s: missing command\n", argv[0]);
280 exit_usage (argv[0], 1);
281 }
283 c = NULL;
284 status = lcc_connect (address, &c);
285 if (status != 0) {
286 fprintf (stderr, "ERROR: Failed to connect to daemon at %s: %s.\n",
287 address, strerror (errno));
288 return (1);
289 }
291 if (strcasecmp (argv[optind], "getval") == 0)
292 status = getval (c, argc - optind, argv + optind);
293 else if (strcasecmp (argv[optind], "flush") == 0)
294 status = flush (c, argc - optind, argv + optind);
295 else {
296 fprintf (stderr, "%s: invalid command: %s\n", argv[0], argv[optind]);
297 return (1);
298 }
300 LCC_DESTROY (c);
302 if (status != 0)
303 return (status);
304 return (0);
305 } /* main */
307 /* vim: set sw=2 ts=2 tw=78 expandtab : */