2 * Copyright (C) 2011 EfficiOS Inc.
4 * SPDX-License-Identifier: GPL-2.0-only
14 #include <sys/types.h>
17 #include <common/sessiond-comm/sessiond-comm.hpp>
18 #include <common/mi-lttng.hpp>
20 #include "../command.hpp"
22 static int opt_no_wait
;
23 static struct mi_writer
*writer
;
25 #ifdef LTTNG_EMBED_HELP
26 static const char help_msg
[] =
27 #include <lttng-stop.1.h>
36 static struct poptOption long_options
[] = {
37 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
38 {"help", 'h', POPT_ARG_NONE
, 0, OPT_HELP
, 0, 0},
39 {"list-options", 0, POPT_ARG_NONE
, NULL
, OPT_LIST_OPTIONS
, NULL
, NULL
},
40 {"no-wait", 'n', POPT_ARG_VAL
, &opt_no_wait
, 1, 0, 0},
45 * Mi print of partial session
47 static int mi_print_session(char *session_name
, int enabled
)
51 LTTNG_ASSERT(session_name
);
53 /* Open session element */
54 ret
= mi_lttng_writer_open_element(writer
, config_element_session
);
59 /* Print session name element */
60 ret
= mi_lttng_writer_write_element_string(writer
, config_element_name
,
67 ret
= mi_lttng_writer_write_element_bool(writer
, config_element_enabled
,
73 /* Close session element */
74 ret
= mi_lttng_writer_close_element(writer
);
81 * Start tracing for all trace of the session.
83 static int stop_tracing(const char *arg_session_name
)
88 if (arg_session_name
== NULL
) {
89 session_name
= get_session_name();
91 session_name
= strdup(arg_session_name
);
92 if (session_name
== NULL
) {
93 PERROR("Failed to copy session name");
97 if (session_name
== NULL
) {
102 ret
= lttng_stop_tracing_no_wait(session_name
);
105 case LTTNG_ERR_TRACE_ALREADY_STOPPED
:
106 WARN("Tracing already stopped for session %s", session_name
);
109 ERR("%s", lttng_strerror(ret
));
116 _MSG("Waiting for data availability");
119 ret
= lttng_data_pending(session_name
);
121 /* Return the data available call error. */
126 * Data sleep time before retrying (in usec). Don't sleep if the call
127 * returned value indicates availability.
130 usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US
);
140 print_session_stats(session_name
);
141 MSG("Tracing stopped for session %s", session_name
);
143 ret
= mi_print_session(session_name
, 0);
159 * The 'stop <options>' first level command
161 int cmd_stop(int argc
, const char **argv
)
163 int opt
, ret
= CMD_SUCCESS
, command_ret
= CMD_SUCCESS
, success
= 1;
164 static poptContext pc
;
165 const char *arg_session_name
= NULL
;
166 const char *leftover
= NULL
;
168 pc
= poptGetContext(NULL
, argc
, argv
, long_options
, 0);
169 poptReadDefaultConfig(pc
, 0);
171 while ((opt
= poptGetNextOpt(pc
)) != -1) {
176 case OPT_LIST_OPTIONS
:
177 list_cmd_options(stdout
, long_options
);
187 writer
= mi_lttng_writer_create(fileno(stdout
), lttng_opt_mi
);
189 ret
= -LTTNG_ERR_NOMEM
;
193 /* Open command element */
194 ret
= mi_lttng_writer_command_open(writer
,
195 mi_lttng_element_command_stop
);
201 /* Open output element */
202 ret
= mi_lttng_writer_open_element(writer
,
203 mi_lttng_element_command_output
);
210 * Open sessions element
213 ret
= mi_lttng_writer_open_element(writer
,
214 config_element_sessions
);
221 arg_session_name
= poptGetArg(pc
);
223 leftover
= poptGetArg(pc
);
225 ERR("Unknown argument: %s", leftover
);
230 command_ret
= stop_tracing(arg_session_name
);
237 /* Close sessions and output element */
238 ret
= mi_lttng_close_multi_element(writer
, 2);
245 ret
= mi_lttng_writer_write_element_bool(writer
,
246 mi_lttng_element_command_success
, success
);
252 /* Command element close */
253 ret
= mi_lttng_writer_command_close(writer
);
262 if (writer
&& mi_lttng_writer_destroy(writer
)) {
263 /* Preserve original error code */
264 ret
= ret
? ret
: -LTTNG_ERR_MI_IO_FAIL
;
267 /* Overwrite ret if an error occurred in stop_tracing() */
268 ret
= command_ret
? command_ret
: ret
;