2 * collectd - src/utils_cmds.h
3 * Copyright (C) 2016 Sebastian 'tokkee' Harl
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24 * Sebastian 'tokkee' Harl <sh at tokkee.org>
28 #define UTILS_CMDS_H 1
41 #define CMD_TO_STRING(type) \
42 ((type) == CMD_FLUSH) ? "FLUSH" \
43 : ((type) == CMD_GETVAL) ? "GETVAL" \
44 : ((type) == CMD_LISTVAL) ? "LISTVAL" \
45 : ((type) == CMD_PUTVAL) ? "PUTVAL" \
53 identifier_t *identifiers;
54 size_t identifiers_num;
59 identifier_t identifier;
66 /* The raw identifier as provided by the user. */
69 /* An array of the fully parsed identifier and all value lists, and their
70 * options as provided by the user. */
80 * The representation of a fully parsed command.
87 cmd_listval_t listval;
97 * Status codes describing the parse result.
102 CMD_PARSE_ERROR = -2,
103 CMD_UNKNOWN_COMMAND = -3,
105 /* Not necessarily fatal errors. */
111 * cmd_error_handler_t
114 * An error handler describes a callback to be invoked when the parser
115 * encounters an error. The user data pointer will be passed to the callback
116 * as the first argument.
119 void (*cb) (void *, cmd_status_t, const char *, va_list);
121 } cmd_error_handler_t;
128 * Reports an error via the specified error handler (if set).
130 void cmd_error (cmd_status_t status, cmd_error_handler_t *err,
131 const char *format, ...);
138 * Parse a command string and populate a command object.
141 * `buffer' The command string to be parsed.
142 * `ret_cmd' The parse result will be stored at this location.
143 * `err' An optional error handler to invoke on error.
146 * CMD_OK on success or the respective error code otherwise.
148 cmd_status_t cmd_parse (char *buffer,
149 cmd_t *ret_cmd, cmd_error_handler_t *err);
151 cmd_status_t cmd_parsev (size_t argc, char **argv,
152 cmd_t *ret_cmd, cmd_error_handler_t *err);
154 void cmd_destroy (cmd_t *cmd);
161 * Parses a command option which must be of the form:
162 * name=value with \ and spaces
165 * `field' The parsed input field with any quotes removed and special
166 * characters unescaped.
167 * `ret_key' The parsed key will be stored at this location.
168 * `ret_value' The parsed value will be stored at this location.
171 * CMD_OK on success or an error code otherwise.
172 * CMD_NO_OPTION if `field' does not represent an option at all (missing
175 cmd_status_t cmd_parse_option (char *field,
176 char **ret_key, char **ret_value, cmd_error_handler_t *err);
183 * An error callback writing the message to an open file handle using the
184 * format expected by the unixsock or exec plugins.
187 * `ud' Error handler user-data pointer. This must be an open
188 * file-handle (FILE *).
189 * `status' The error status code.
190 * `format' Printf-style format string.
191 * `ap' Variable argument list providing the arguments for the format
194 void cmd_error_fh (void *ud, cmd_status_t status,
195 const char *format, va_list ap);
197 #endif /* UTILS_CMDS_H */