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>
32 #ifdef LTTNG_EMBED_HELP
33 static const char help_msg
[] =
34 #include <lttng-stop.1.h>
39 struct mi_writer
*writer
;
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 int stop_tracing(const char *session_name
)
92 ret
= lttng_stop_tracing_no_wait(session_name
);
95 case LTTNG_ERR_TRACE_ALREADY_STOPPED
:
96 WARN("Tracing already stopped for session %s", session_name
);
99 ERR("%s", lttng_strerror(ret
));
106 _MSG("Waiting for data availability");
109 ret
= lttng_data_pending(session_name
);
111 /* Return the data available call error. */
116 * Data sleep time before retrying (in usec). Don't sleep if the call
117 * returned value indicates availability.
120 usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US
);
130 print_session_stats(session_name
);
131 MSG("Tracing stopped for session %s", session_name
);
133 ret
= mi_print_session(session_name
, 0);
139 int stop_tracing(const struct session_spec
& spec
)
141 int ret
= CMD_SUCCESS
;
144 for (const auto& session
: list_sessions(spec
)) {
145 int const sub_ret
= stop_tracing(session
.name
);
147 if (sub_ret
!= CMD_SUCCESS
) {
151 } catch (lttng::ctl::error
& error
) {
162 * The 'stop <options>' first level command
164 int cmd_stop(int argc
, const char **argv
)
166 int opt
, ret
= CMD_SUCCESS
, command_ret
= CMD_SUCCESS
, success
= 1;
167 static poptContext pc
;
168 const char *leftover
= nullptr;
169 struct session_spec session_spec
= {
170 .type
= session_spec::NAME
,
174 pc
= poptGetContext(nullptr, argc
, argv
, long_options
, 0);
175 poptReadDefaultConfig(pc
, 0);
177 while ((opt
= poptGetNextOpt(pc
)) != -1) {
182 case OPT_LIST_OPTIONS
:
183 list_cmd_options(stdout
, long_options
);
185 case OPT_ENABLE_GLOB
:
186 session_spec
.type
= session_spec::GLOB_PATTERN
;
189 session_spec
.type
= session_spec::ALL
;
199 writer
= mi_lttng_writer_create(fileno(stdout
), lttng_opt_mi
);
201 ret
= -LTTNG_ERR_NOMEM
;
205 /* Open command element */
206 ret
= mi_lttng_writer_command_open(writer
, mi_lttng_element_command_stop
);
212 /* Open output element */
213 ret
= mi_lttng_writer_open_element(writer
, mi_lttng_element_command_output
);
220 * Open sessions element
223 ret
= mi_lttng_writer_open_element(writer
, config_element_sessions
);
230 session_spec
.value
= poptGetArg(pc
);
232 leftover
= poptGetArg(pc
);
234 ERR("Unknown argument: %s", leftover
);
239 command_ret
= stop_tracing(session_spec
);
246 /* Close sessions and output element */
247 ret
= mi_lttng_close_multi_element(writer
, 2);
254 ret
= mi_lttng_writer_write_element_bool(
255 writer
, mi_lttng_element_command_success
, success
);
261 /* Command element close */
262 ret
= mi_lttng_writer_command_close(writer
);
271 if (writer
&& mi_lttng_writer_destroy(writer
)) {
272 /* Preserve original error code */
273 ret
= ret
? ret
: -LTTNG_ERR_MI_IO_FAIL
;
276 /* Overwrite ret if an error occurred in stop_tracing() */
277 ret
= command_ret
? command_ret
: ret
;