2 * Copyright (C) 2011 EfficiOS Inc.
4 * SPDX-License-Identifier: GPL-2.0-only
9 #include "../command.hpp"
10 #include "../utils.hpp"
12 #include <common/exception.hpp>
13 #include <common/mi-lttng.hpp>
14 #include <common/sessiond-comm/sessiond-comm.hpp>
21 #include <sys/types.h>
33 struct mi_writer
*writer
;
35 #ifdef LTTNG_EMBED_HELP
36 const char help_msg
[] =
37 #include <lttng-stop.1.h>
41 struct poptOption long_options
[] = {
42 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
43 { "help", 'h', POPT_ARG_NONE
, nullptr, OPT_HELP
, nullptr, nullptr },
44 { "list-options", 0, POPT_ARG_NONE
, nullptr, OPT_LIST_OPTIONS
, nullptr, nullptr },
45 { "no-wait", 'n', POPT_ARG_VAL
, &opt_no_wait
, 1, nullptr, nullptr },
46 { "glob", 'g', POPT_ARG_NONE
, nullptr, OPT_ENABLE_GLOB
, nullptr, nullptr },
47 { "all", 'a', POPT_ARG_NONE
, nullptr, OPT_ALL
, nullptr, nullptr },
48 { nullptr, 0, 0, nullptr, 0, nullptr, nullptr }
52 * Mi print of partial session
54 int mi_print_session(const char *session_name
, int enabled
)
58 LTTNG_ASSERT(session_name
);
60 /* Open session element */
61 ret
= mi_lttng_writer_open_element(writer
, config_element_session
);
66 /* Print session name element */
67 ret
= mi_lttng_writer_write_element_string(writer
, config_element_name
, session_name
);
73 ret
= mi_lttng_writer_write_element_bool(writer
, config_element_enabled
, enabled
);
78 /* Close session element */
79 ret
= mi_lttng_writer_close_element(writer
);
86 * Start tracing for all trace of the session.
88 cmd_error_code
stop_tracing(const char *session_name
)
92 ret
= lttng_stop_tracing_no_wait(session_name
);
94 LTTNG_THROW_CTL(fmt::format("Failed to start session `{}`", session_name
),
95 static_cast<lttng_error_code
>(-ret
));
99 _MSG("Waiting for data availability");
102 ret
= lttng_data_pending(session_name
);
104 /* Return the data available call error. */
105 ERR_FMT("Failed to check pending data for session `{}` ({})",
107 lttng_strerror(ret
));
112 * Data sleep time before retrying (in usec). Don't sleep if the call
113 * returned value indicates availability.
116 usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US
);
124 print_session_stats(session_name
);
125 MSG("Tracing stopped for session `%s`", session_name
);
127 if (mi_print_session(session_name
, 0)) {
135 cmd_error_code
stop_tracing(const session_spec
& spec
) noexcept
137 bool had_warning
= false;
138 bool had_error
= false;
139 bool listing_failed
= false;
141 const auto sessions
= [&listing_failed
, &spec
]() -> session_list
{
143 return list_sessions(spec
);
144 } catch (const lttng::ctl::error
& ctl_exception
) {
145 ERR_FMT("Failed to list sessions ({})",
146 lttng_strerror(-ctl_exception
.code()));
147 listing_failed
= true;
152 if (!listing_failed
&& sessions
.size() == 0 && spec
.type
== session_spec::type::NAME
) {
153 ERR_FMT("Session `{}` not found", spec
.value
);
157 if (listing_failed
) {
161 for (const auto& session
: sessions
) {
162 cmd_error_code sub_ret
;
165 sub_ret
= stop_tracing(session
.name
);
166 } catch (const lttng::ctl::error
& ctl_exception
) {
167 switch (ctl_exception
.code()) {
168 case LTTNG_ERR_TRACE_ALREADY_STOPPED
:
169 WARN_FMT("Tracing already stopped for session `{}`", session
.name
);
170 sub_ret
= CMD_SUCCESS
;
172 case LTTNG_ERR_NO_SESSION
:
173 if (spec
.type
!= session_spec::type::NAME
) {
174 /* Session destroyed during command, ignore and carry-on. */
175 sub_ret
= CMD_SUCCESS
;
181 case LTTNG_ERR_NO_SESSIOND
:
182 /* Don't keep going on a fatal error. */
187 ERR_FMT("Failed to stop session `{}` ({})",
189 lttng_strerror(-ctl_exception
.code()));
194 /* Keep going, but report the most serious state. */
195 had_warning
|= sub_ret
== CMD_WARNING
;
196 had_error
|= sub_ret
== CMD_ERROR
;
201 } else if (had_warning
) {
212 * The 'stop <options>' first level command
214 int cmd_stop(int argc
, const char **argv
)
217 cmd_error_code command_ret
= CMD_SUCCESS
;
219 static poptContext pc
;
220 const char *leftover
= nullptr;
221 struct session_spec session_spec
= {
222 .type
= session_spec::NAME
,
226 pc
= poptGetContext(nullptr, argc
, argv
, long_options
, 0);
227 poptReadDefaultConfig(pc
, 0);
229 while ((opt
= poptGetNextOpt(pc
)) != -1) {
236 command_ret
= static_cast<cmd_error_code
>(ret
);
239 case OPT_LIST_OPTIONS
:
240 list_cmd_options(stdout
, long_options
);
242 case OPT_ENABLE_GLOB
:
243 session_spec
.type
= session_spec::GLOB_PATTERN
;
246 session_spec
.type
= session_spec::ALL
;
249 command_ret
= CMD_UNDEFINED
;
256 writer
= mi_lttng_writer_create(fileno(stdout
), lttng_opt_mi
);
258 command_ret
= CMD_ERROR
;
262 /* Open command element */
263 if (mi_lttng_writer_command_open(writer
, mi_lttng_element_command_stop
)) {
264 command_ret
= CMD_ERROR
;
268 /* Open output element */
269 if (mi_lttng_writer_open_element(writer
, mi_lttng_element_command_output
)) {
270 command_ret
= CMD_ERROR
;
275 * Open sessions element
278 if (mi_lttng_writer_open_element(writer
, config_element_sessions
)) {
279 command_ret
= CMD_ERROR
;
284 session_spec
.value
= poptGetArg(pc
);
286 leftover
= poptGetArg(pc
);
288 ERR("Unknown argument: %s", leftover
);
289 command_ret
= CMD_ERROR
;
293 command_ret
= stop_tracing(session_spec
);
300 /* Close sessions and output element */
301 if (mi_lttng_close_multi_element(writer
, 2)) {
302 command_ret
= CMD_ERROR
;
307 if (mi_lttng_writer_write_element_bool(
308 writer
, mi_lttng_element_command_success
, success
)) {
309 command_ret
= CMD_ERROR
;
313 /* Command element close */
314 if (mi_lttng_writer_command_close(writer
)) {
315 command_ret
= CMD_ERROR
;
322 if (writer
&& mi_lttng_writer_destroy(writer
)) {
323 command_ret
= CMD_ERROR
;