2 * Copyright (C) 2011 EfficiOS Inc.
4 * SPDX-License-Identifier: GPL-2.0-only
14 #include <sys/types.h>
18 #include <common/sessiond-comm/sessiond-comm.h>
19 #include <common/mi-lttng.h>
21 #include "../command.h"
23 static int opt_no_wait
;
24 static struct mi_writer
*writer
;
26 #ifdef LTTNG_EMBED_HELP
27 static const char help_msg
[] =
28 #include <lttng-stop.1.h>
37 static struct poptOption long_options
[] = {
38 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
39 {"help", 'h', POPT_ARG_NONE
, 0, OPT_HELP
, 0, 0},
40 {"list-options", 0, POPT_ARG_NONE
, NULL
, OPT_LIST_OPTIONS
, NULL
, NULL
},
41 {"no-wait", 'n', POPT_ARG_VAL
, &opt_no_wait
, 1, 0, 0},
46 * Mi print of partial session
48 static int mi_print_session(char *session_name
, int enabled
)
54 /* Open session element */
55 ret
= mi_lttng_writer_open_element(writer
, config_element_session
);
60 /* Print session name element */
61 ret
= mi_lttng_writer_write_element_string(writer
, config_element_name
,
68 ret
= mi_lttng_writer_write_element_bool(writer
, config_element_enabled
,
74 /* Close session element */
75 ret
= mi_lttng_writer_close_element(writer
);
82 * Start tracing for all trace of the session.
84 static int stop_tracing(const char *arg_session_name
)
89 if (arg_session_name
== NULL
) {
90 session_name
= get_session_name();
92 session_name
= strdup(arg_session_name
);
93 if (session_name
== NULL
) {
94 PERROR("Failed to copy session name");
98 if (session_name
== NULL
) {
103 ret
= lttng_stop_tracing_no_wait(session_name
);
106 case LTTNG_ERR_TRACE_ALREADY_STOPPED
:
107 WARN("Tracing already stopped for session %s", session_name
);
110 ERR("%s", lttng_strerror(ret
));
117 _MSG("Waiting for data availability");
120 ret
= lttng_data_pending(session_name
);
122 /* Return the data available call error. */
127 * Data sleep time before retrying (in usec). Don't sleep if the call
128 * returned value indicates availability.
131 usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US
);
141 print_session_stats(session_name
);
142 MSG("Tracing stopped for session %s", session_name
);
144 ret
= mi_print_session(session_name
, 0);
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 *arg_session_name
= NULL
;
167 const char *leftover
= NULL
;
169 pc
= poptGetContext(NULL
, argc
, argv
, long_options
, 0);
170 poptReadDefaultConfig(pc
, 0);
172 while ((opt
= poptGetNextOpt(pc
)) != -1) {
177 case OPT_LIST_OPTIONS
:
178 list_cmd_options(stdout
, long_options
);
188 writer
= mi_lttng_writer_create(fileno(stdout
), lttng_opt_mi
);
190 ret
= -LTTNG_ERR_NOMEM
;
194 /* Open command element */
195 ret
= mi_lttng_writer_command_open(writer
,
196 mi_lttng_element_command_stop
);
202 /* Open output element */
203 ret
= mi_lttng_writer_open_element(writer
,
204 mi_lttng_element_command_output
);
211 * Open sessions element
214 ret
= mi_lttng_writer_open_element(writer
,
215 config_element_sessions
);
222 arg_session_name
= poptGetArg(pc
);
224 leftover
= poptGetArg(pc
);
226 ERR("Unknown argument: %s", leftover
);
231 command_ret
= stop_tracing(arg_session_name
);
238 /* Close sessions and output element */
239 ret
= mi_lttng_close_multi_element(writer
, 2);
246 ret
= mi_lttng_writer_write_element_bool(writer
,
247 mi_lttng_element_command_success
, success
);
253 /* Command element close */
254 ret
= mi_lttng_writer_command_close(writer
);
263 if (writer
&& mi_lttng_writer_destroy(writer
)) {
264 /* Preserve original error code */
265 ret
= ret
? ret
: -LTTNG_ERR_MI_IO_FAIL
;
268 /* Overwrite ret if an error occurred in stop_tracing() */
269 ret
= command_ret
? command_ret
: ret
;