1 /**
2 * collectd - src/utils_cmd_listval.c
3 * Copyright (C) 2008 Florian octo Forster
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Florian octo Forster <octo at collectd.org>
25 **/
26
27 #include "collectd.h"
28
29 #include "plugin.h"
30 #include "utils/common/common.h"
31
32 #include "utils/cmds/listval.h"
33 #include "utils/cmds/parse_option.h"
34 #include "utils_cache.h"
35
cmd_parse_listval(size_t argc,char ** argv,const cmd_options_t * opts,cmd_error_handler_t * err)36 cmd_status_t cmd_parse_listval(size_t argc, char **argv,
37 const cmd_options_t *opts
38 __attribute__((unused)),
39 cmd_error_handler_t *err) {
40 if (argc != 0) {
41 cmd_error(CMD_PARSE_ERROR, err, "Garbage after end of command: `%s'.",
42 argv[0]);
43 return CMD_PARSE_ERROR;
44 }
45
46 return CMD_OK;
47 } /* cmd_status_t cmd_parse_listval */
48
49 #define free_everything_and_return(status) \
50 do { \
51 for (size_t j = 0; j < number; j++) { \
52 sfree(names[j]); \
53 names[j] = NULL; \
54 } \
55 sfree(names); \
56 sfree(times); \
57 return status; \
58 } while (0)
59
60 #define print_to_socket(fh, ...) \
61 do { \
62 if (fprintf(fh, __VA_ARGS__) < 0) { \
63 WARNING("handle_listval: failed to write to socket #%i: %s", fileno(fh), \
64 STRERRNO); \
65 free_everything_and_return(CMD_ERROR); \
66 } \
67 fflush(fh); \
68 } while (0)
69
cmd_handle_listval(FILE * fh,char * buffer)70 cmd_status_t cmd_handle_listval(FILE *fh, char *buffer) {
71 cmd_error_handler_t err = {cmd_error_fh, fh};
72 cmd_status_t status;
73 cmd_t cmd;
74
75 char **names = NULL;
76 cdtime_t *times = NULL;
77 size_t number = 0;
78
79 DEBUG("utils_cmd_listval: handle_listval (fh = %p, buffer = %s);", (void *)fh,
80 buffer);
81
82 if ((status = cmd_parse(buffer, &cmd, NULL, &err)) != CMD_OK)
83 return status;
84 if (cmd.type != CMD_LISTVAL) {
85 cmd_error(CMD_UNKNOWN_COMMAND, &err, "Unexpected command: `%s'.",
86 CMD_TO_STRING(cmd.type));
87 free_everything_and_return(CMD_UNKNOWN_COMMAND);
88 }
89
90 status = uc_get_names(&names, ×, &number);
91 if (status != 0) {
92 DEBUG("command listval: uc_get_names failed with status %i", status);
93 cmd_error(CMD_ERROR, &err, "uc_get_names failed.");
94 free_everything_and_return(CMD_ERROR);
95 }
96
97 print_to_socket(fh, "%i Value%s found\n", (int)number,
98 (number == 1) ? "" : "s");
99 for (size_t i = 0; i < number; i++)
100 print_to_socket(fh, "%.3f %s\n", CDTIME_T_TO_DOUBLE(times[i]), names[i]);
101
102 free_everything_and_return(CMD_OK);
103 } /* cmd_status_t cmd_handle_listval */
104