projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| cac3069d DG |
1 | /* |
| 2 | * Copyright (C) 2013 David Goulet <dgoulet@efficios.com> | |
| 3 | * | |
| 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. | |
| 7 | * | |
| 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 | |
| 11 | * for more details. | |
| 12 | * | |
| 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 | |
| 16 | */ | |
| 17 | ||
| 18 | #ifndef LTTNG_CTL_HELPER_H | |
| 19 | #define LTTNG_CTL_HELPER_H | |
| 20 | ||
| cac3069d DG |
21 | #include <stdio.h> |
| 22 | ||
| 23 | #include <common/sessiond-comm/sessiond-comm.h> | |
| 24 | #include <lttng/lttng.h> | |
| 25 | ||
| 26 | /* | |
| 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. | |
| 30 | */ | |
| 31 | ||
| 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); | |
| 36 | ||
| 37 | /* | |
| c2d69327 | 38 | * Sends the lttcomm message to the session daemon and fills buf if the |
| cac3069d DG |
39 | * returned data is not NULL. |
| 40 | * | |
| 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. | |
| 43 | */ | |
| 44 | int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm, | |
| 795a978d PP |
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); | |
| 48 | ||
| 49 | /* | |
| 50 | * Calls lttng_ctl_ask_sessiond_varlen() with no expected command header. | |
| 51 | */ | |
| 52 | static inline | |
| 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) | |
| 55 | { | |
| 56 | return lttng_ctl_ask_sessiond_varlen(lsm, vardata, | |
| 57 | vardata_len, user_payload_buf, NULL, NULL); | |
| 58 | } | |
| cac3069d DG |
59 | |
| 60 | /* | |
| 61 | * Use this if no variable length data needs to be sent. | |
| 62 | */ | |
| 63 | static inline | |
| 64 | int lttng_ctl_ask_sessiond(struct lttcomm_session_msg *lsm, void **buf) | |
| 65 | { | |
| 795a978d | 66 | return lttng_ctl_ask_sessiond_varlen_no_cmd_header(lsm, NULL, 0, buf); |
| cac3069d DG |
67 | } |
| 68 | ||
| 6c71277b MD |
69 | int lttng_check_tracing_group(void); |
| 70 | ||
| cac3069d | 71 | #endif /* LTTNG_CTL_HELPER_H */ |