[lttng-tools.git] / src / bin / lttng / commands / destroy.cpp

/*
 * Copyright (C) 2011 EfficiOS Inc.
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#define _LGPL_SOURCE
#include "../command.hpp"

#include <common/exception.hpp>
#include <common/make-unique-wrapper.hpp>
#include <common/mi-lttng.hpp>
#include <common/scope-exit.hpp>
#include <common/sessiond-comm/sessiond-comm.hpp>
#include <common/utils.hpp>

#include <lttng/lttng.h>

#include <popt.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

enum {
	OPT_HELP = 1,
	OPT_LIST_OPTIONS,
	OPT_ALL,
	OPT_ENABLE_GLOB,
};

namespace {
#ifdef LTTNG_EMBED_HELP
const char help_msg[] =
#include <lttng-destroy.1.h>
	;
#endif

int opt_no_wait;

/* Mi writer */
struct mi_writer *writer;

struct poptOption long_options[] = {
	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	{ "help", 'h', POPT_ARG_NONE, nullptr, OPT_HELP, nullptr, nullptr },
	{ "all", 'a', POPT_ARG_NONE, nullptr, OPT_ALL, nullptr, nullptr },
	{ "glob", 'g', POPT_ARG_NONE, nullptr, OPT_ENABLE_GLOB, nullptr, nullptr },
	{ "list-options", 0, POPT_ARG_NONE, nullptr, OPT_LIST_OPTIONS, nullptr, nullptr },
	{ "no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, nullptr, nullptr },
	{ nullptr, 0, 0, nullptr, 0, nullptr, nullptr }
};

/*
 * destroy_session
 *
 * Unregister the provided session to the session daemon. On success, removes
 * the default configuration.
 */
cmd_error_code destroy_session(const lttng_session& session)
{
	int ret;
	bool newline_needed = false, printed_destroy_msg = false;

	const auto print_trailing_new_line = lttng::make_scope_exit([&newline_needed]() noexcept {
		if (newline_needed) {
			MSG("");
		}
	});

	ret = lttng_stop_tracing_no_wait(session.name);
	if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) {
		LTTNG_THROW_CTL(lttng::format("Failed to stop session `{}`", session.name),
				static_cast<lttng_error_code>(-ret));
	}

	const auto session_was_already_stopped = ret == -LTTNG_ERR_TRACE_ALREADY_STOPPED;
	if (!opt_no_wait) {
		do {
			ret = lttng_data_pending(session.name);
			if (ret < 0) {
				/* Return the data available call error. */
				ERR_FMT("Failed to check pending data for session `{}` ({})",
					session.name,
					lttng_strerror(ret));
				return CMD_ERROR;
			}

			/*
			 * Data sleep time before retrying (in usec). Don't
			 * sleep if the call returned value indicates
			 * availability.
			 */
			if (ret) {
				if (!printed_destroy_msg) {
					_MSG("Destroying session `%s`", session.name);
					newline_needed = true;
					printed_destroy_msg = true;
					fflush(stdout);
				}

				usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US);
				_MSG(".");
				fflush(stdout);
			}
		} while (ret != 0);
	}

	std::unique_ptr<char,
			lttng::memory::create_deleter_class<char, lttng::memory::free>::deleter>
		stats_str;
	if (!session_was_already_stopped) {
		char *raw_stats_str = nullptr;

		/*
		 * Don't print the event and packet loss warnings since the user
		 * already saw them when stopping the trace.
		 */
		ret = get_session_stats_str(session.name, &raw_stats_str);
		if (ret < 0) {
			return CMD_ERROR;
		}

		/* May still be null if there are no stats to print. */
		stats_str.reset(raw_stats_str);
	}

	const auto destruction_handle = [&session]() {
		struct lttng_destruction_handle *raw_destruction_handle = nullptr;

		auto ctl_ret_code =
			lttng_destroy_session_ext(session.name, &raw_destruction_handle);
		if (ctl_ret_code != LTTNG_OK) {
			LTTNG_THROW_CTL(lttng::format("Failed to destroy session `{}`",
						      session.name),
					ctl_ret_code);
		}

		return lttng::make_unique_wrapper<lttng_destruction_handle,
						  lttng_destruction_handle_destroy>(
			raw_destruction_handle);
	}();

	if (!opt_no_wait) {
		enum lttng_destruction_handle_status status;

		do {
			status = lttng_destruction_handle_wait_for_completion(
				destruction_handle.get(),
				DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US / USEC_PER_MSEC);
			switch (status) {
			case LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT:
				if (!printed_destroy_msg) {
					_MSG("Destroying session `%s`", session.name);
					newline_needed = true;
					printed_destroy_msg = true;
				}
				_MSG(".");
				fflush(stdout);
				break;
			case LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED:
				break;
			default:
				ERR_FMT("{}An error occurred during the destruction of session `{}`",
					newline_needed ? "\n" : "",
					session.name);
				newline_needed = false;
				return CMD_ERROR;
			}
		} while (status == LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT);

		enum lttng_error_code ctl_ret_code;
		status = lttng_destruction_handle_get_result(destruction_handle.get(),
							     &ctl_ret_code);
		if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
			ERR_FMT("{}Failed to query the result of the destruction of session `{}`",
				newline_needed ? "\n" : "",
				session.name);

			newline_needed = false;
			return CMD_ERROR;
		}

		if (ctl_ret_code != LTTNG_OK) {
			LTTNG_THROW_CTL(lttng::format("Failed to destroy session `{}`",
						      session.name),
					ctl_ret_code);
		}

		enum lttng_rotation_state rotation_state;
		status = lttng_destruction_handle_get_rotation_state(destruction_handle.get(),
								     &rotation_state);
		if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
			ERR_FMT("{}Failed to query the rotation state from the destruction handle of session `{}`",
				newline_needed ? "\n" : "",
				session.name);
			newline_needed = false;
		} else {
			switch (rotation_state) {
			case LTTNG_ROTATION_STATE_NO_ROTATION:
				break;
			case LTTNG_ROTATION_STATE_COMPLETED:
			{
				const struct lttng_trace_archive_location *location;

				status = lttng_destruction_handle_get_archive_location(
					destruction_handle.get(), &location);
				if (status == LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
					ret = print_trace_archive_location(location, session.name);
					if (ret) {
						ERR_FMT("{}Failed to print the location of the latest trace archive of session `{}`",
							newline_needed ? "\n" : "",
							session.name);
						newline_needed = false;
					}

					break;
				}
			}
			/* fall-through. */
			default:
				ERR_FMT("{}Failed to get the location of the rotation performed during the destruction of `{}`",
					newline_needed ? "\n" : "",
					session.name);
				newline_needed = false;
				break;
			}
		}
	}

	MSG("%sSession `%s` destroyed", newline_needed ? "\n" : "", session.name);
	newline_needed = false;
	if (stats_str) {
		MSG("%s", stats_str.get());
	}

	/*
	 * If the session being destroy is the "default" session as defined in the .lttngrc file,
	 * destroy the file.
	 */
	const auto session_name =
		lttng::make_unique_wrapper<char, lttng::memory::free>(get_session_name_quiet());
	if (session_name && !strncmp(session.name, session_name.get(), NAME_MAX)) {
		config_destroy_default();
	}

	if (lttng_opt_mi) {
		ret = mi_lttng_session(writer, &session, 0);
		if (ret) {
			return CMD_ERROR;
		}
	}

	return CMD_SUCCESS;
}

cmd_error_code destroy_sessions(const lttng::cli::session_spec& spec)
{
	bool had_warning = false;
	bool had_error = false;
	bool listing_failed = false;

	const auto sessions = [&listing_failed, &spec]() -> lttng::cli::session_list {
		try {
			return list_sessions(spec);
		} catch (const lttng::ctl::error& ctl_exception) {
			ERR_FMT("Failed to list sessions ({})",
				lttng_strerror(-ctl_exception.code()));
			listing_failed = true;
			return {};
		}
	}();

	if (!listing_failed && sessions.size() == 0 &&
	    spec.type_ == lttng::cli::session_spec::type::NAME) {
		ERR_FMT("Session `{}` not found", spec.value);
		return CMD_ERROR;
	}

	if (listing_failed) {
		return CMD_FATAL;
	}

	for (const auto& session : sessions) {
		cmd_error_code sub_ret;

		try {
			sub_ret = destroy_session(session);
		} catch (const lttng::ctl::error& ctl_exception) {
			switch (ctl_exception.code()) {
			case LTTNG_ERR_NO_SESSION:
				if (spec.type_ != lttng::cli::session_spec::type::NAME) {
					/* Session destroyed during command, ignore and carry-on. */
					sub_ret = CMD_SUCCESS;
					break;
				} else {
					sub_ret = CMD_ERROR;
					break;
				}
			case LTTNG_ERR_NO_SESSIOND:
				/* Don't keep going on a fatal error. */
				return CMD_FATAL;
			default:
				/* Generic error. */
				sub_ret = CMD_ERROR;
				ERR_FMT("Failed to destroy session `{}` ({})",
					session.name,
					lttng_strerror(-ctl_exception.code()));
				break;
			}
		}

		/* Keep going, but report the most serious state. */
		had_warning |= sub_ret == CMD_WARNING;
		had_error |= sub_ret == CMD_ERROR;
	}

	if (had_error) {
		return CMD_ERROR;
	} else if (had_warning) {
		return CMD_WARNING;
	} else {
		return CMD_SUCCESS;
	}
}
} /* namespace */

/*
 * The 'destroy <options>' first level command
 */
int cmd_destroy(int argc, const char **argv)
{
	int opt;
	cmd_error_code command_ret = CMD_SUCCESS;
	bool success;
	static poptContext pc;
	const char *leftover = nullptr;
	lttng::cli::session_spec spec(lttng::cli::session_spec::type::NAME);
	lttng::cli::session_list const sessions;

	pc = poptGetContext(nullptr, argc, argv, long_options, 0);
	poptReadDefaultConfig(pc, 0);

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch (opt) {
		case OPT_HELP:
		{
			int ret;

			SHOW_HELP();
			command_ret = static_cast<cmd_error_code>(ret);
			goto end;
		}
		case OPT_LIST_OPTIONS:
			list_cmd_options(stdout, long_options);
			goto end;
		case OPT_ALL:
			spec.type_ = lttng::cli::session_spec::type::ALL;
			break;
		case OPT_ENABLE_GLOB:
			spec.type_ = lttng::cli::session_spec::type::GLOB_PATTERN;
			break;
		default:
			command_ret = CMD_UNDEFINED;
			goto end;
		}
	}

	/* Mi preparation */
	if (lttng_opt_mi) {
		writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
		if (!writer) {
			command_ret = CMD_ERROR;
			goto end;
		}

		/* Open command element */
		if (mi_lttng_writer_command_open(writer, mi_lttng_element_command_destroy)) {
			command_ret = CMD_ERROR;
			goto end;
		}

		/* Open output element */
		if (mi_lttng_writer_open_element(writer, mi_lttng_element_command_output)) {
			command_ret = CMD_ERROR;
			goto end;
		}

		/* For validation and semantic purpose we open a sessions element */
		if (mi_lttng_sessions_open(writer)) {
			command_ret = CMD_ERROR;
			goto end;
		}
	}

	spec.value = poptGetArg(pc);

	command_ret = destroy_sessions(spec);

	success = command_ret == CMD_SUCCESS;

	leftover = poptGetArg(pc);
	if (leftover) {
		ERR("Unknown argument: %s", leftover);
		command_ret = CMD_ERROR;
		success = false;
	}

	/* Mi closing */
	if (lttng_opt_mi) {
		/* Close sessions and output element element */
		if (mi_lttng_close_multi_element(writer, 2)) {
			command_ret = CMD_ERROR;
			goto end;
		}

		/* Success ? */
		if (mi_lttng_writer_write_element_bool(
			    writer, mi_lttng_element_command_success, success)) {
			command_ret = CMD_ERROR;
			goto end;
		}

		/* Command element close */
		if (mi_lttng_writer_command_close(writer)) {
			command_ret = CMD_ERROR;
			goto end;
		}
	}
end:
	/* Mi clean-up */
	if (writer && mi_lttng_writer_destroy(writer)) {
		command_ret = CMD_ERROR;
	}

	poptFreeContext(pc);
	return command_ret;
}
Commit	Line	Data
f3ed775e	1	/*
21cf9b6b	2	* Copyright (C) 2011 EfficiOS Inc.
f3ed775e	3	*
ab5be9fa	4	* SPDX-License-Identifier: GPL-2.0-only
f3ed775e	5	*
f3ed775e DG	6	*/
f3ed775e DG	7
6c1c0768	8	#define _LGPL_SOURCE
28ab034a JG	9	#include "../command.hpp"
28ab034a JG	10
aabf6773	11	#include <common/exception.hpp>
b50fbe86	12	#include <common/make-unique-wrapper.hpp>
28ab034a	13	#include <common/mi-lttng.hpp>
b50fbe86	14	#include <common/scope-exit.hpp>
28ab034a JG	15	#include <common/sessiond-comm/sessiond-comm.hpp>
	16	#include <common/utils.hpp>
	17
	18	#include <lttng/lttng.h>
	19
f3ed775e	20	#include <popt.h>
28ab034a	21	#include <stdbool.h>
f3ed775e DG	22	#include <stdio.h>
	23	#include <stdlib.h>
	24	#include <string.h>
	25	#include <sys/stat.h>
	26	#include <sys/types.h>
	27	#include <unistd.h>
42224349	28
544349a3 JG	29	enum {
	30	OPT_HELP = 1,
	31	OPT_LIST_OPTIONS,
	32	OPT_ALL,
	33	OPT_ENABLE_GLOB,
	34	};
f3ed775e	35
544349a3	36	namespace {
4fc83d94	37	#ifdef LTTNG_EMBED_HELP
544349a3	38	const char help_msg[] =
4fc83d94	39	#include <lttng-destroy.1.h>
28ab034a	40	;
4fc83d94 PP	41	#endif
4fc83d94 PP	42
544349a3	43	int opt_no_wait;
65f25c66	44
544349a3 JG	45	/* Mi writer */
544349a3 JG	46	struct mi_writer *writer;
f3ed775e	47
544349a3	48	struct poptOption long_options[] = {
f3ed775e	49	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
cd9adb8b	50	{ "help", 'h', POPT_ARG_NONE, nullptr, OPT_HELP, nullptr, nullptr },
aabf6773 OD	51	{ "all", 'a', POPT_ARG_NONE, nullptr, OPT_ALL, nullptr, nullptr },
aabf6773 OD	52	{ "glob", 'g', POPT_ARG_NONE, nullptr, OPT_ENABLE_GLOB, nullptr, nullptr },
cd9adb8b JG	53	{ "list-options", 0, POPT_ARG_NONE, nullptr, OPT_LIST_OPTIONS, nullptr, nullptr },
	54	{ "no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, nullptr, nullptr },
	55	{ nullptr, 0, 0, nullptr, 0, nullptr, nullptr }
f3ed775e DG	56	};
f3ed775e DG	57
f3ed775e	58	/*
b09ee5ba FG	59	* destroy_session
	60	*
	61	* Unregister the provided session to the session daemon. On success, removes
	62	* the default configuration.
f3ed775e	63	*/
b50fbe86	64	cmd_error_code destroy_session(const lttng_session& session)
f3ed775e DG	65	{
f3ed775e DG	66	int ret;
58f237ca	67	bool newline_needed = false, printed_destroy_msg = false;
b50fbe86 JG	68
	69	const auto print_trailing_new_line = lttng::make_scope_exit([&newline_needed]() noexcept {
	70	if (newline_needed) {
	71	MSG("");
	72	}
	73	});
f3ed775e	74
aabf6773	75	ret = lttng_stop_tracing_no_wait(session.name);
e20ee7c2	76	if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) {
f9a41357	77	LTTNG_THROW_CTL(lttng::format("Failed to stop session `{}`", session.name),
b50fbe86	78	static_cast<lttng_error_code>(-ret));
e20ee7c2	79	}
58f237ca	80
b50fbe86	81	const auto session_was_already_stopped = ret == -LTTNG_ERR_TRACE_ALREADY_STOPPED;
e20ee7c2	82	if (!opt_no_wait) {
e20ee7c2	83	do {
aabf6773	84	ret = lttng_data_pending(session.name);
e20ee7c2 JD	85	if (ret < 0) {
e20ee7c2 JD	86	/* Return the data available call error. */
b50fbe86 JG	87	ERR_FMT("Failed to check pending data for session `{}` ({})",
	88	session.name,
	89	lttng_strerror(ret));
	90	return CMD_ERROR;
e20ee7c2 JD	91	}
	92
	93	/*
58f237ca JG	94	* Data sleep time before retrying (in usec). Don't
	95	* sleep if the call returned value indicates
	96	* availability.
e20ee7c2 JD	97	*/
e20ee7c2 JD	98	if (ret) {
dec2c8e1	99	if (!printed_destroy_msg) {
b50fbe86	100	_MSG("Destroying session `%s`", session.name);
dec2c8e1 JG	101	newline_needed = true;
	102	printed_destroy_msg = true;
	103	fflush(stdout);
	104	}
01f55be4	105
c8f61fd4	106	usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US);
e20ee7c2 JD	107	_MSG(".");
	108	fflush(stdout);
	109	}
	110	} while (ret != 0);
e20ee7c2	111	}
58f237ca	112
303ac4ed JG	113	std::unique_ptr<char,
303ac4ed JG	114	lttng::memory::create_deleter_class<char, lttng::memory::free>::deleter>
b50fbe86	115	stats_str;
58f237ca	116	if (!session_was_already_stopped) {
b50fbe86 JG	117	char *raw_stats_str = nullptr;
b50fbe86 JG	118
20fb9e02 JD	119	/*
	120	* Don't print the event and packet loss warnings since the user
	121	* already saw them when stopping the trace.
	122	*/
b50fbe86	123	ret = get_session_stats_str(session.name, &raw_stats_str);
58f237ca	124	if (ret < 0) {
b50fbe86	125	return CMD_ERROR;
58f237ca	126	}
e20ee7c2	127
b50fbe86 JG	128	/* May still be null if there are no stats to print. */
b50fbe86 JG	129	stats_str.reset(raw_stats_str);
f3ed775e DG	130	}
f3ed775e DG	131
b50fbe86 JG	132	const auto destruction_handle = [&session]() {
	133	struct lttng_destruction_handle *raw_destruction_handle = nullptr;
	134
	135	auto ctl_ret_code =
	136	lttng_destroy_session_ext(session.name, &raw_destruction_handle);
	137	if (ctl_ret_code != LTTNG_OK) {
f9a41357 JG	138	LTTNG_THROW_CTL(lttng::format("Failed to destroy session `{}`",
f9a41357 JG	139	session.name),
b50fbe86 JG	140	ctl_ret_code);
b50fbe86 JG	141	}
bbbfd849	142
b50fbe86 JG	143	return lttng::make_unique_wrapper<lttng_destruction_handle,
	144	lttng_destruction_handle_destroy>(
	145	raw_destruction_handle);
	146	}();
	147
	148	if (!opt_no_wait) {
	149	enum lttng_destruction_handle_status status;
	150
	151	do {
	152	status = lttng_destruction_handle_wait_for_completion(
	153	destruction_handle.get(),
	154	DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US / USEC_PER_MSEC);
	155	switch (status) {
	156	case LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT:
	157	if (!printed_destroy_msg) {
	158	_MSG("Destroying session `%s`", session.name);
	159	newline_needed = true;
	160	printed_destroy_msg = true;
	161	}
	162	_MSG(".");
	163	fflush(stdout);
	164	break;
	165	case LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED:
	166	break;
	167	default:
	168	ERR_FMT("{}An error occurred during the destruction of session `{}`",
	169	newline_needed ? "\n" : "",
	170	session.name);
	171	newline_needed = false;
	172	return CMD_ERROR;
bbbfd849	173	}
b50fbe86 JG	174	} while (status == LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT);
	175
	176	enum lttng_error_code ctl_ret_code;
	177	status = lttng_destruction_handle_get_result(destruction_handle.get(),
	178	&ctl_ret_code);
	179	if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
	180	ERR_FMT("{}Failed to query the result of the destruction of session `{}`",
	181	newline_needed ? "\n" : "",
	182	session.name);
	183
58f237ca	184	newline_needed = false;
b50fbe86	185	return CMD_ERROR;
bbbfd849	186	}
bbbfd849	187
b50fbe86	188	if (ctl_ret_code != LTTNG_OK) {
f9a41357 JG	189	LTTNG_THROW_CTL(lttng::format("Failed to destroy session `{}`",
f9a41357 JG	190	session.name),
b50fbe86 JG	191	ctl_ret_code);
b50fbe86 JG	192	}
bbbfd849	193
b50fbe86 JG	194	enum lttng_rotation_state rotation_state;
	195	status = lttng_destruction_handle_get_rotation_state(destruction_handle.get(),
	196	&rotation_state);
	197	if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
	198	ERR_FMT("{}Failed to query the rotation state from the destruction handle of session `{}`",
	199	newline_needed ? "\n" : "",
	200	session.name);
	201	newline_needed = false;
	202	} else {
	203	switch (rotation_state) {
	204	case LTTNG_ROTATION_STATE_NO_ROTATION:
	205	break;
	206	case LTTNG_ROTATION_STATE_COMPLETED:
	207	{
	208	const struct lttng_trace_archive_location *location;
	209
	210	status = lttng_destruction_handle_get_archive_location(
	211	destruction_handle.get(), &location);
	212	if (status == LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
	213	ret = print_trace_archive_location(location, session.name);
	214	if (ret) {
	215	ERR_FMT("{}Failed to print the location of the latest trace archive of session `{}`",
	216	newline_needed ? "\n" : "",
	217	session.name);
	218	newline_needed = false;
	219	}
	220
	221	break;
	222	}
	223	}
	224	/* fall-through. */
	225	default:
	226	ERR_FMT("{}Failed to get the location of the rotation performed during the destruction of `{}`",
	227	newline_needed ? "\n" : "",
	228	session.name);
58f237ca	229	newline_needed = false;
b50fbe86	230	break;
bbbfd849	231	}
bbbfd849	232	}
58f237ca	233	}
b50fbe86 JG	234
b50fbe86 JG	235	MSG("%sSession `%s` destroyed", newline_needed ? "\n" : "", session.name);
58f237ca JG	236	newline_needed = false;
58f237ca JG	237	if (stats_str) {
b50fbe86	238	MSG("%s", stats_str.get());
58f237ca	239	}
1dac0189	240
b50fbe86 JG	241	/*
	242	* If the session being destroy is the "default" session as defined in the .lttngrc file,
	243	* destroy the file.
	244	*/
	245	const auto session_name =
303ac4ed	246	lttng::make_unique_wrapper<char, lttng::memory::free>(get_session_name_quiet());
b50fbe86	247	if (session_name && !strncmp(session.name, session_name.get(), NAME_MAX)) {
1dac0189 PPM	248	config_destroy_default();
1dac0189 PPM	249	}
65f25c66 JRJ	250
65f25c66 JRJ	251	if (lttng_opt_mi) {
aabf6773	252	ret = mi_lttng_session(writer, &session, 0);
65f25c66	253	if (ret) {
b50fbe86	254	return CMD_ERROR;
65f25c66 JRJ	255	}
	256	}
	257
b50fbe86	258	return CMD_SUCCESS;
b09ee5ba	259	}
f3ed775e	260
6e11909e	261	cmd_error_code destroy_sessions(const lttng::cli::session_spec& spec)
b09ee5ba	262	{
b50fbe86 JG	263	bool had_warning = false;
b50fbe86 JG	264	bool had_error = false;
544349a3 JG	265	bool listing_failed = false;
544349a3 JG	266
6e11909e	267	const auto sessions = [&listing_failed, &spec]() -> lttng::cli::session_list {
544349a3 JG	268	try {
	269	return list_sessions(spec);
	270	} catch (const lttng::ctl::error& ctl_exception) {
	271	ERR_FMT("Failed to list sessions ({})",
	272	lttng_strerror(-ctl_exception.code()));
	273	listing_failed = true;
	274	return {};
aabf6773	275	}
544349a3 JG	276	}();
544349a3 JG	277
6e11909e JG	278	if (!listing_failed && sessions.size() == 0 &&
6e11909e JG	279	spec.type_ == lttng::cli::session_spec::type::NAME) {
b50fbe86 JG	280	ERR_FMT("Session `{}` not found", spec.value);
	281	return CMD_ERROR;
	282	}
	283
	284	if (listing_failed) {
	285	return CMD_FATAL;
544349a3	286	}
aabf6773	287
544349a3	288	for (const auto& session : sessions) {
b50fbe86	289	cmd_error_code sub_ret;
aabf6773	290
b50fbe86 JG	291	try {
	292	sub_ret = destroy_session(session);
	293	} catch (const lttng::ctl::error& ctl_exception) {
	294	switch (ctl_exception.code()) {
	295	case LTTNG_ERR_NO_SESSION:
6e11909e	296	if (spec.type_ != lttng::cli::session_spec::type::NAME) {
b50fbe86 JG	297	/* Session destroyed during command, ignore and carry-on. */
	298	sub_ret = CMD_SUCCESS;
	299	break;
	300	} else {
	301	sub_ret = CMD_ERROR;
	302	break;
	303	}
	304	case LTTNG_ERR_NO_SESSIOND:
	305	/* Don't keep going on a fatal error. */
	306	return CMD_FATAL;
	307	default:
	308	/* Generic error. */
	309	sub_ret = CMD_ERROR;
	310	ERR_FMT("Failed to destroy session `{}` ({})",
	311	session.name,
	312	lttng_strerror(-ctl_exception.code()));
	313	break;
	314	}
544349a3	315	}
b50fbe86 JG	316
	317	/* Keep going, but report the most serious state. */
	318	had_warning \|= sub_ret == CMD_WARNING;
	319	had_error \|= sub_ret == CMD_ERROR;
b73d0b29	320	}
3285a971	321
b50fbe86 JG	322	if (had_error) {
	323	return CMD_ERROR;
	324	} else if (had_warning) {
	325	return CMD_WARNING;
	326	} else {
	327	return CMD_SUCCESS;
	328	}
f3ed775e	329	}
544349a3	330	} /* namespace */
f3ed775e DG	331
f3ed775e DG	332	/*
843f5df9	333	* The 'destroy <options>' first level command
f3ed775e DG	334	*/
	335	int cmd_destroy(int argc, const char **argv)
	336	{
b09ee5ba	337	int opt;
544349a3	338	cmd_error_code command_ret = CMD_SUCCESS;
aabf6773	339	bool success;
f3ed775e	340	static poptContext pc;
cd9adb8b	341	const char *leftover = nullptr;
6e11909e JG	342	lttng::cli::session_spec spec(lttng::cli::session_spec::type::NAME);
6e11909e JG	343	lttng::cli::session_list const sessions;
65f25c66	344
cd9adb8b	345	pc = poptGetContext(nullptr, argc, argv, long_options, 0);
f3ed775e DG	346	poptReadDefaultConfig(pc, 0);
	347
	348	while ((opt = poptGetNextOpt(pc)) != -1) {
	349	switch (opt) {
	350	case OPT_HELP:
544349a3 JG	351	{
	352	int ret;
	353
4ba92f18	354	SHOW_HELP();
544349a3	355	command_ret = static_cast<cmd_error_code>(ret);
aabf6773	356	goto end;
544349a3	357	}
679b4943 SM	358	case OPT_LIST_OPTIONS:
679b4943 SM	359	list_cmd_options(stdout, long_options);
aabf6773 OD	360	goto end;
aabf6773 OD	361	case OPT_ALL:
6e11909e	362	spec.type_ = lttng::cli::session_spec::type::ALL;
aabf6773 OD	363	break;
aabf6773 OD	364	case OPT_ENABLE_GLOB:
6e11909e	365	spec.type_ = lttng::cli::session_spec::type::GLOB_PATTERN;
b09ee5ba	366	break;
f3ed775e	367	default:
544349a3	368	command_ret = CMD_UNDEFINED;
aabf6773	369	goto end;
f3ed775e DG	370	}
	371	}
	372
65f25c66	373	/* Mi preparation */
c7e35b03	374	if (lttng_opt_mi) {
65f25c66 JRJ	375	writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
65f25c66 JRJ	376	if (!writer) {
544349a3	377	command_ret = CMD_ERROR;
65f25c66 JRJ	378	goto end;
	379	}
	380
	381	/* Open command element */
544349a3 JG	382	if (mi_lttng_writer_command_open(writer, mi_lttng_element_command_destroy)) {
544349a3 JG	383	command_ret = CMD_ERROR;
65f25c66 JRJ	384	goto end;
	385	}
	386
	387	/* Open output element */
544349a3 JG	388	if (mi_lttng_writer_open_element(writer, mi_lttng_element_command_output)) {
544349a3 JG	389	command_ret = CMD_ERROR;
65f25c66 JRJ	390	goto end;
	391	}
	392
	393	/* For validation and semantic purpose we open a sessions element */
544349a3 JG	394	if (mi_lttng_sessions_open(writer)) {
544349a3 JG	395	command_ret = CMD_ERROR;
65f25c66 JRJ	396	goto end;
	397	}
	398	}
	399
aabf6773	400	spec.value = poptGetArg(pc);
fd076c09	401
aabf6773	402	command_ret = destroy_sessions(spec);
65f25c66	403
aabf6773	404	success = command_ret == CMD_SUCCESS;
65f25c66	405
68c7f6e5 JD	406	leftover = poptGetArg(pc);
	407	if (leftover) {
	408	ERR("Unknown argument: %s", leftover);
544349a3	409	command_ret = CMD_ERROR;
aabf6773	410	success = false;
68c7f6e5 JD	411	}
68c7f6e5 JD	412
65f25c66 JRJ	413	/* Mi closing */
	414	if (lttng_opt_mi) {
	415	/* Close sessions and output element element */
544349a3	416	if (mi_lttng_close_multi_element(writer, 2)) {
b50fbe86	417	command_ret = CMD_ERROR;
b09ee5ba FG	418	goto end;
b09ee5ba FG	419	}
fd076c09	420
65f25c66	421	/* Success ? */
544349a3	422	if (mi_lttng_writer_write_element_bool(
b50fbe86 JG	423	writer, mi_lttng_element_command_success, success)) {
b50fbe86 JG	424	command_ret = CMD_ERROR;
65f25c66 JRJ	425	goto end;
65f25c66 JRJ	426	}
f3ed775e	427
65f25c66	428	/* Command element close */
544349a3	429	if (mi_lttng_writer_command_close(writer)) {
b50fbe86	430	command_ret = CMD_ERROR;
65f25c66 JRJ	431	goto end;
	432	}
	433	}
f3ed775e	434	end:
65f25c66 JRJ	435	/* Mi clean-up */
65f25c66 JRJ	436	if (writer && mi_lttng_writer_destroy(writer)) {
544349a3	437	command_ret = CMD_ERROR;
65f25c66 JRJ	438	}
65f25c66 JRJ	439
fd076c09	440	poptFreeContext(pc);
544349a3	441	return command_ret;
f3ed775e	442	}