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>
24 static int opt_no_wait
;
25 static struct mi_writer
*writer
;
27 #ifdef LTTNG_EMBED_HELP
28 static const char help_msg
[] =
29 #include <lttng-stop.1.h>
40 static struct poptOption long_options
[] = {
41 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
42 { "help", 'h', POPT_ARG_NONE
, nullptr, OPT_HELP
, nullptr, nullptr },
43 { "list-options", 0, POPT_ARG_NONE
, nullptr, OPT_LIST_OPTIONS
, nullptr, nullptr },
44 { "no-wait", 'n', POPT_ARG_VAL
, &opt_no_wait
, 1, nullptr, nullptr },
45 { "glob", 'g', POPT_ARG_NONE
, nullptr, OPT_ENABLE_GLOB
, nullptr, nullptr },
46 { "all", 'a', POPT_ARG_NONE
, nullptr, OPT_ALL
, nullptr, nullptr },
47 { nullptr, 0, 0, nullptr, 0, nullptr, nullptr }
51 * Mi print of partial session
53 static int mi_print_session(const char *session_name
, int enabled
)
57 LTTNG_ASSERT(session_name
);
59 /* Open session element */
60 ret
= mi_lttng_writer_open_element(writer
, config_element_session
);
65 /* Print session name element */
66 ret
= mi_lttng_writer_write_element_string(writer
, config_element_name
, session_name
);
72 ret
= mi_lttng_writer_write_element_bool(writer
, config_element_enabled
, enabled
);
77 /* Close session element */
78 ret
= mi_lttng_writer_close_element(writer
);
85 * Start tracing for all trace of the session.
87 static int stop_tracing(const char *session_name
)
91 ret
= lttng_stop_tracing_no_wait(session_name
);
94 case LTTNG_ERR_TRACE_ALREADY_STOPPED
:
95 WARN("Tracing already stopped for session %s", session_name
);
98 ERR("%s", lttng_strerror(ret
));
105 _MSG("Waiting for data availability");
108 ret
= lttng_data_pending(session_name
);
110 /* Return the data available call error. */
115 * Data sleep time before retrying (in usec). Don't sleep if the call
116 * returned value indicates availability.
119 usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US
);
129 print_session_stats(session_name
);
130 MSG("Tracing stopped for session %s", session_name
);
132 ret
= mi_print_session(session_name
, 0);
138 static int stop_tracing(const struct session_spec
& spec
)
140 int ret
= CMD_SUCCESS
;
143 for (const auto& session
: list_sessions(spec
)) {
144 int const sub_ret
= stop_tracing(session
.name
);
146 if (sub_ret
!= CMD_SUCCESS
) {
150 } catch (lttng::ctl::error
& error
) {
160 * The 'stop <options>' first level command
162 int cmd_stop(int argc
, const char **argv
)
164 int opt
, ret
= CMD_SUCCESS
, command_ret
= CMD_SUCCESS
, success
= 1;
165 static poptContext pc
;
166 const char *leftover
= nullptr;
167 struct session_spec session_spec
= {
168 .type
= session_spec::NAME
,
172 pc
= poptGetContext(nullptr, argc
, argv
, long_options
, 0);
173 poptReadDefaultConfig(pc
, 0);
175 while ((opt
= poptGetNextOpt(pc
)) != -1) {
180 case OPT_LIST_OPTIONS
:
181 list_cmd_options(stdout
, long_options
);
183 case OPT_ENABLE_GLOB
:
184 session_spec
.type
= session_spec::GLOB_PATTERN
;
187 session_spec
.type
= session_spec::ALL
;
197 writer
= mi_lttng_writer_create(fileno(stdout
), lttng_opt_mi
);
199 ret
= -LTTNG_ERR_NOMEM
;
203 /* Open command element */
204 ret
= mi_lttng_writer_command_open(writer
, mi_lttng_element_command_stop
);
210 /* Open output element */
211 ret
= mi_lttng_writer_open_element(writer
, mi_lttng_element_command_output
);
218 * Open sessions element
221 ret
= mi_lttng_writer_open_element(writer
, config_element_sessions
);
228 session_spec
.value
= poptGetArg(pc
);
230 leftover
= poptGetArg(pc
);
232 ERR("Unknown argument: %s", leftover
);
237 command_ret
= stop_tracing(session_spec
);
244 /* Close sessions and output element */
245 ret
= mi_lttng_close_multi_element(writer
, 2);
252 ret
= mi_lttng_writer_write_element_bool(
253 writer
, mi_lttng_element_command_success
, success
);
259 /* Command element close */
260 ret
= mi_lttng_writer_command_close(writer
);
269 if (writer
&& mi_lttng_writer_destroy(writer
)) {
270 /* Preserve original error code */
271 ret
= ret
? ret
: -LTTNG_ERR_MI_IO_FAIL
;
274 /* Overwrite ret if an error occurred in stop_tracing() */
275 ret
= command_ret
? command_ret
: ret
;