2 * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
4 * This library is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU Lesser General Public License, version 2.1 only,
6 * as published by the Free Software Foundation.
8 * This library is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this library; if not, write to the Free Software Foundation,
15 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 #ifndef LTTNG_CTL_HELPER_H
19 #define LTTNG_CTL_HELPER_H
23 #include <common/sessiond-comm/sessiond-comm.h>
24 #include <lttng/lttng.h>
27 * NOTE: Every symbol in this helper header MUST be set to hidden so not to
28 * polute the library name space. Use LTTNG_HIDDEN macro before declaring the
29 * function in the C file.
32 /* Copy helper functions. */
33 void lttng_ctl_copy_string(char *dst
, const char *src
, size_t len
);
34 void lttng_ctl_copy_lttng_domain(struct lttng_domain
*dst
,
35 struct lttng_domain
*src
);
38 * Sends the lttcomm message to the session daemon and fills buf if the
39 * returned data is not NULL.
41 * Return the size of the received data on success or else a negative lttng
42 * error code. If buf is NULL, 0 is returned on success.
44 int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg
*lsm
,
45 const void *vardata
, size_t vardata_len
,
46 void **user_payload_buf
, void **user_cmd_header_buf
,
47 size_t *user_cmd_header_len
);
50 * Calls lttng_ctl_ask_sessiond_varlen() with no expected command header.
53 int lttng_ctl_ask_sessiond_varlen_no_cmd_header(struct lttcomm_session_msg
*lsm
,
54 void *vardata
, size_t vardata_len
, void **user_payload_buf
)
56 return lttng_ctl_ask_sessiond_varlen(lsm
, vardata
,
57 vardata_len
, user_payload_buf
, NULL
, NULL
);
61 * Use this if no variable length data needs to be sent.
64 int lttng_ctl_ask_sessiond(struct lttcomm_session_msg
*lsm
, void **buf
)
66 return lttng_ctl_ask_sessiond_varlen_no_cmd_header(lsm
, NULL
, 0, buf
);
69 int lttng_check_tracing_group(void);
71 #endif /* LTTNG_CTL_HELPER_H */
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