+++ /dev/null
-/**
- * collectd - src/utils_cmd_getval.c
- * Copyright (C) 2008 Florian octo Forster
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- * Florian octo Forster <octo at collectd.org>
- **/
-
-#include "collectd.h"
-
-#include "common.h"
-#include "plugin.h"
-
-#include "utils_cache.h"
-#include "utils_cmd_getval.h"
-#include "utils_parse_option.h"
-
-cmd_status_t cmd_parse_getval(size_t argc, char **argv,
- cmd_getval_t *ret_getval,
- const cmd_options_t *opts,
- cmd_error_handler_t *err) {
- char *identifier_copy;
- int status;
-
- if ((ret_getval == NULL) || (opts == NULL)) {
- errno = EINVAL;
- cmd_error(CMD_ERROR, err, "Invalid arguments to cmd_parse_getval.");
- return CMD_ERROR;
- }
-
- if (argc != 1) {
- if (argc == 0)
- cmd_error(CMD_PARSE_ERROR, err, "Missing identifier.");
- else
- cmd_error(CMD_PARSE_ERROR, err, "Garbage after identifier: `%s'.",
- argv[1]);
- return CMD_PARSE_ERROR;
- }
-
- /* parse_identifier() modifies its first argument,
- * returning pointers into it */
- identifier_copy = sstrdup(argv[0]);
-
- status = parse_identifier(
- argv[0], &ret_getval->identifier.host, &ret_getval->identifier.plugin,
- &ret_getval->identifier.plugin_instance, &ret_getval->identifier.type,
- &ret_getval->identifier.type_instance, opts->identifier_default_host);
- if (status != 0) {
- DEBUG("cmd_parse_getval: Cannot parse identifier `%s'.", identifier_copy);
- cmd_error(CMD_PARSE_ERROR, err, "Cannot parse identifier `%s'.",
- identifier_copy);
- sfree(identifier_copy);
- return CMD_PARSE_ERROR;
- }
-
- ret_getval->raw_identifier = identifier_copy;
- return CMD_OK;
-} /* cmd_status_t cmd_parse_getval */
-
-#define print_to_socket(fh, ...) \
- do { \
- if (fprintf(fh, __VA_ARGS__) < 0) { \
- WARNING("cmd_handle_getval: failed to write to socket #%i: %s", \
- fileno(fh), STRERRNO); \
- return -1; \
- } \
- fflush(fh); \
- } while (0)
-
-cmd_status_t cmd_handle_getval(FILE *fh, char *buffer) {
- cmd_error_handler_t err = {cmd_error_fh, fh};
- cmd_status_t status;
- cmd_t cmd;
-
- gauge_t *values;
- size_t values_num;
-
- const data_set_t *ds;
-
- if ((fh == NULL) || (buffer == NULL))
- return -1;
-
- DEBUG("utils_cmd_getval: cmd_handle_getval (fh = %p, buffer = %s);",
- (void *)fh, buffer);
-
- if ((status = cmd_parse(buffer, &cmd, NULL, &err)) != CMD_OK)
- return status;
- if (cmd.type != CMD_GETVAL) {
- cmd_error(CMD_UNKNOWN_COMMAND, &err, "Unexpected command: `%s'.",
- CMD_TO_STRING(cmd.type));
- cmd_destroy(&cmd);
- return CMD_UNKNOWN_COMMAND;
- }
-
- ds = plugin_get_ds(cmd.cmd.getval.identifier.type);
- if (ds == NULL) {
- DEBUG("cmd_handle_getval: plugin_get_ds (%s) == NULL;",
- cmd.cmd.getval.identifier.type);
- cmd_error(CMD_ERROR, &err, "Type `%s' is unknown.\n",
- cmd.cmd.getval.identifier.type);
- cmd_destroy(&cmd);
- return -1;
- }
-
- values = NULL;
- values_num = 0;
- status =
- uc_get_rate_by_name(cmd.cmd.getval.raw_identifier, &values, &values_num);
- if (status != 0) {
- cmd_error(CMD_ERROR, &err, "No such value.");
- cmd_destroy(&cmd);
- return CMD_ERROR;
- }
-
- if (ds->ds_num != values_num) {
- ERROR("ds[%s]->ds_num = %" PRIsz ", "
- "but uc_get_rate_by_name returned %" PRIsz " values.",
- ds->type, ds->ds_num, values_num);
- cmd_error(CMD_ERROR, &err, "Error reading value from cache.");
- sfree(values);
- cmd_destroy(&cmd);
- return CMD_ERROR;
- }
-
- print_to_socket(fh, "%" PRIsz " Value%s found\n", values_num,
- (values_num == 1) ? "" : "s");
- for (size_t i = 0; i < values_num; i++) {
- print_to_socket(fh, "%s=", ds->ds[i].name);
- if (isnan(values[i])) {
- print_to_socket(fh, "NaN\n");
- } else {
- print_to_socket(fh, "%12e\n", values[i]);
- }
- }
-
- sfree(values);
- cmd_destroy(&cmd);
-
- return CMD_OK;
-} /* cmd_status_t cmd_handle_getval */
-
-void cmd_destroy_getval(cmd_getval_t *getval) {
- if (getval == NULL)
- return;
-
- sfree(getval->raw_identifier);
-} /* void cmd_destroy_getval */
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