[lttng-tools.git] / src / bin / lttng-sessiond / sessiond-config.c

/*
 * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "version.h"
#include "sessiond-config.h"
#include <assert.h>
#include "lttng-ust-ctl.h"
#include <common/defaults.h>
#include <limits.h>
#include <errno.h>
#include <ctype.h>
#include <common/error.h>
#include <common/utils.h>
#include <common/compat/getenv.h>

static
struct sessiond_config sessiond_config_build_defaults = {
	.quiet =		        	false,
	.verbose = 				0,
	.verbose_consumer = 			0,

	.agent_tcp_port = 			{ .begin = DEFAULT_AGENT_TCP_PORT_RANGE_BEGIN, .end = DEFAULT_AGENT_TCP_PORT_RANGE_END },
	.app_socket_timeout = 			DEFAULT_APP_SOCKET_RW_TIMEOUT,

	.no_kernel = 				false,
	.background = 				false,
	.daemonize = 				false,
	.sig_parent = 				false,

	.tracing_group_name.value = 		DEFAULT_TRACING_GROUP,
	.kmod_probes_list.value =		NULL,
	.kmod_extra_probes_list.value =		NULL,

	.rundir.value =				NULL,

	.apps_unix_sock_path.value = 		NULL,
	.client_unix_sock_path.value = 		NULL,
	.wait_shm_path.value = 			NULL,
	.health_unix_sock_path.value = 		NULL,
	.lttng_ust_clock_plugin.value =		NULL,
	.pid_file_path.value =			NULL,
	.lock_file_path.value =			NULL,
	.agent_port_file_path.value =		NULL,
	.load_session_path.value =		NULL,

	.consumerd32_path.value =		NULL,
	.consumerd32_bin_path.value =		NULL,
	.consumerd32_lib_dir.value =		NULL,
	.consumerd32_err_unix_sock_path.value = NULL,
	.consumerd32_cmd_unix_sock_path.value = NULL,

	.consumerd64_path.value =		NULL,
	.consumerd64_bin_path.value =		NULL,
	.consumerd64_lib_dir.value =		NULL,
	.consumerd64_err_unix_sock_path.value = NULL,
	.consumerd64_cmd_unix_sock_path.value = NULL,

	.kconsumerd_path.value =		NULL,
	.kconsumerd_err_unix_sock_path.value = 	NULL,
	.kconsumerd_cmd_unix_sock_path.value = 	NULL,
};

static
void config_string_fini(struct config_string *str)
{
	config_string_set(str, NULL);
}

static
void config_string_set_static(struct config_string *config_str,
		const char *value)
{
	config_string_set(config_str, (char *) value);
	config_str->should_free = false;
}

/* Only use for dynamically-allocated strings. */
LTTNG_HIDDEN
void config_string_set(struct config_string *config_str, char *value)
{
	assert(config_str);
	if (config_str->should_free) {
		free(config_str->value);
		config_str->should_free = false;
	}

	config_str->should_free = !!value;
	config_str->value = value;
}

LTTNG_HIDDEN
int sessiond_config_apply_env_config(struct sessiond_config *config)
{
	int ret = 0;
	const char *env_value;

	env_value = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV);
	if (env_value) {
		char *endptr;
		long int_val;

		errno = 0;
		int_val = strtoul(env_value, &endptr, 0);
		if (errno != 0 || int_val > INT_MAX ||
				(int_val < 0 && int_val != -1)) {
			ERR("Invalid value \"%s\" used for \"%s\" environment variable",
					env_value, DEFAULT_APP_SOCKET_TIMEOUT_ENV);
			ret = -1;
			goto end;
		}

		config->app_socket_timeout = int_val;
	}

	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN");
	if (env_value) {
		config_string_set_static(&config->consumerd32_bin_path,
				env_value);
	}
	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN");
	if (env_value) {
		config_string_set_static(&config->consumerd64_bin_path,
				env_value);
	}

	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR");
	if (env_value) {
		config_string_set_static(&config->consumerd32_lib_dir,
				env_value);
	}
	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR");
	if (env_value) {
		config_string_set_static(&config->consumerd64_lib_dir,
				env_value);
	}

	env_value = lttng_secure_getenv("LTTNG_UST_CLOCK_PLUGIN");
	if (env_value) {
		config_string_set_static(&config->lttng_ust_clock_plugin,
				env_value);
	}

	env_value = lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES);
	if (env_value) {
		config_string_set_static(&config->kmod_probes_list,
				env_value);
	}

	env_value = lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES);
	if (env_value) {
		config_string_set_static(&config->kmod_extra_probes_list,
				env_value);
	}
end:
	return ret;
}

static
int config_set_paths_root(struct sessiond_config *config)
{
	int ret = 0;

	config_string_set(&config->rundir, strdup(DEFAULT_LTTNG_RUNDIR));
	if (!config->rundir.value) {
		ERR("Failed to set rundir");
		ret = -1;
		goto end;
	}

	config_string_set_static(&config->apps_unix_sock_path,
			DEFAULT_GLOBAL_APPS_UNIX_SOCK);
	config_string_set_static(&config->client_unix_sock_path,
			DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
	config_string_set_static(&config->wait_shm_path,
			DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH);
	config_string_set_static(&config->health_unix_sock_path,
			DEFAULT_GLOBAL_HEALTH_UNIX_SOCK);
end:
	return ret;
}

static
int config_set_paths_non_root(struct sessiond_config *config)
{
	int ret = 0;
	const char *home_path = utils_get_home_dir();
	char *str;

	if (home_path == NULL) {
		ERR("Can't get HOME directory for sockets creation.");
		ret = -1;
		goto end;
	}

	/*
	 * Create rundir from home path. This will create something like
	 * $HOME/.lttng
	 */
	ret = asprintf(&str, DEFAULT_LTTNG_HOME_RUNDIR, home_path);
	if (ret < 0) {
		ERR("Failed to set rundir");
		goto end;
	}
	config_string_set(&config->rundir, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_APPS_UNIX_SOCK, home_path);
	if (ret < 0) {
		ERR("Failed to set default home apps unix socket path");
		goto end;
	}
	config_string_set(&config->apps_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path);
	if (ret < 0) {
		ERR("Failed to set default home client unix socket path");
		goto end;
	}
	config_string_set(&config->client_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid());
	if (ret < 0) {
		ERR("Failed to set default home apps wait shm path");
		goto end;
	}
	config_string_set(&config->wait_shm_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path);
	if (ret < 0) {
		ERR("Failed to set default home health UNIX socket path");
		goto end;
	}
	config_string_set(&config->health_unix_sock_path, str);
	str = NULL;

	ret = 0;
end:
	return ret;
}

LTTNG_HIDDEN
int sessiond_config_init(struct sessiond_config *config)
{
	int ret;
	bool is_root = (getuid() == 0);
	char *str;

	assert(config);
	memcpy(config, &sessiond_config_build_defaults, sizeof(*config));

	if (is_root) {
		ret = config_set_paths_root(config);
	} else {
		ret = config_set_paths_non_root(config);
	}
	if (ret < 0) {
		goto error;
	}

	/* 32 bits consumerd path setup */
	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 32-bit consumer path");
		goto error;
	}
	config_string_set(&config->consumerd32_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 32-bit consumer error socket path");
		goto error;
	}
	config_string_set(&config->consumerd32_err_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 32-bit consumer command socket path");
		goto error;
	}
	config_string_set(&config->consumerd32_cmd_unix_sock_path, str);
	str = NULL;

	/* 64 bits consumerd path setup */
	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 64-bit consumer path");
		goto error;
	}
	config_string_set(&config->consumerd64_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 64-bit consumer error socket path");
		goto error;
	}
	config_string_set(&config->consumerd64_err_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 64-bit consumer command socket path");
		goto error;
	}
	config_string_set(&config->consumerd64_cmd_unix_sock_path, str);
	str = NULL;

	/* kconsumerd consumerd path setup */
	ret = asprintf(&str, DEFAULT_KCONSUMERD_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set kernel consumer path");
		goto error;
	}
	config_string_set(&config->kconsumerd_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set kernel consumer error socket path");
		goto error;
	}
	config_string_set(&config->kconsumerd_err_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set kernel consumer command socket path");
		goto error;
	}
	config_string_set(&config->kconsumerd_cmd_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, "%s/%s", config->rundir.value,
			DEFAULT_LTTNG_SESSIOND_PIDFILE);
	if (ret < 0) {
		ERR("Failed to set PID file path");
		goto error;
	}
	config_string_set(&config->pid_file_path, str);
	str = NULL;

	ret = asprintf(&str, "%s/%s", config->rundir.value,
			DEFAULT_LTTNG_SESSIOND_LOCKFILE);
	if (ret < 0) {
		ERR("Failed to set lock file path");
		goto error;
	}
	config_string_set(&config->lock_file_path, str);
	str = NULL;

	ret = asprintf(&str, "%s/%s", config->rundir.value,
			DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE);
	if (ret < 0) {
		ERR("Failed to set agent port file path");
		goto error;
	}
	config_string_set(&config->agent_port_file_path, str);
	str = NULL;

	/*
	 * Allow INSTALL_BIN_PATH to be used as a target path for the
	 * native architecture size consumer if CONFIG_CONSUMER*_PATH
	 * has not been defined.
	 */
#if (CAA_BITS_PER_LONG == 32)
	config_string_set_static(&config->consumerd32_bin_path,
			INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	config_string_set_static(&config->consumerd32_lib_dir,
			INSTALL_LIB_PATH);
#elif (CAA_BITS_PER_LONG == 64)
	config_string_set_static(&config->consumerd64_bin_path,
			INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	config_string_set_static(&config->consumerd64_lib_dir,
			INSTALL_LIB_PATH);
#else
#error "Unknown bitness"
#endif
	ret = 0;
	return ret;
error:
	sessiond_config_fini(config);
	return ret;
}

LTTNG_HIDDEN
void sessiond_config_fini(struct sessiond_config *config)
{
	config_string_fini(&config->tracing_group_name);
	config_string_fini(&config->kmod_probes_list);
	config_string_fini(&config->kmod_extra_probes_list);
	config_string_fini(&config->rundir);
	config_string_fini(&config->apps_unix_sock_path);
	config_string_fini(&config->client_unix_sock_path);
	config_string_fini(&config->wait_shm_path);
	config_string_fini(&config->health_unix_sock_path);
	config_string_fini(&config->lttng_ust_clock_plugin);
	config_string_fini(&config->pid_file_path);
	config_string_fini(&config->lock_file_path);
	config_string_fini(&config->load_session_path);
	config_string_fini(&config->agent_port_file_path);
	config_string_fini(&config->consumerd32_path);
	config_string_fini(&config->consumerd32_bin_path);
	config_string_fini(&config->consumerd32_lib_dir);
	config_string_fini(&config->consumerd32_err_unix_sock_path);
	config_string_fini(&config->consumerd32_cmd_unix_sock_path);
	config_string_fini(&config->consumerd64_path);
	config_string_fini(&config->consumerd64_bin_path);
	config_string_fini(&config->consumerd64_lib_dir);
	config_string_fini(&config->consumerd64_err_unix_sock_path);
	config_string_fini(&config->consumerd64_cmd_unix_sock_path);
	config_string_fini(&config->kconsumerd_path);
	config_string_fini(&config->kconsumerd_err_unix_sock_path);
	config_string_fini(&config->kconsumerd_cmd_unix_sock_path);
}

static
int resolve_path(struct config_string *path)
{
	int ret = 0;
	char *absolute_path;

	if (!path->value || path->value[0] == '/') {
		goto end;
	}

	absolute_path = utils_expand_path(path->value);
	if (!absolute_path) {
		ret = -1;
		goto end;
	}

	config_string_set(path, absolute_path);
end:
	return ret;
}

#define RESOLVE_CHECK(path_config_str)		\
	if (resolve_path(path_config_str))	\
		return -1

LTTNG_HIDDEN
int sessiond_config_resolve_paths(struct sessiond_config *config)
{
	RESOLVE_CHECK(&config->apps_unix_sock_path);
	RESOLVE_CHECK(&config->client_unix_sock_path);
	RESOLVE_CHECK(&config->wait_shm_path);
	RESOLVE_CHECK(&config->health_unix_sock_path);
	RESOLVE_CHECK(&config->lttng_ust_clock_plugin);
	RESOLVE_CHECK(&config->pid_file_path);
	RESOLVE_CHECK(&config->lock_file_path);
	RESOLVE_CHECK(&config->load_session_path);
	RESOLVE_CHECK(&config->agent_port_file_path);
	RESOLVE_CHECK(&config->consumerd32_path);
	RESOLVE_CHECK(&config->consumerd32_bin_path);
	RESOLVE_CHECK(&config->consumerd32_lib_dir);
	RESOLVE_CHECK(&config->consumerd32_err_unix_sock_path);
	RESOLVE_CHECK(&config->consumerd32_cmd_unix_sock_path);
	RESOLVE_CHECK(&config->consumerd64_path);
	RESOLVE_CHECK(&config->consumerd64_bin_path);
	RESOLVE_CHECK(&config->consumerd64_lib_dir);
	RESOLVE_CHECK(&config->consumerd64_err_unix_sock_path);
	RESOLVE_CHECK(&config->consumerd64_cmd_unix_sock_path);
	RESOLVE_CHECK(&config->kconsumerd_path);
	RESOLVE_CHECK(&config->kconsumerd_err_unix_sock_path);
	RESOLVE_CHECK(&config->kconsumerd_cmd_unix_sock_path);
	return 0;
}

LTTNG_HIDDEN
void sessiond_config_log(struct sessiond_config *config)
{
	DBG_NO_LOC("[sessiond configuration]");
	DBG_NO_LOC("\tversion                        %s", VERSION);
	if (GIT_VERSION[0] != '\0') {
		DBG_NO_LOC("\tgit version                    %s", GIT_VERSION);
	}
	if (EXTRA_VERSION_NAME[0] != '\0') {
		DBG_NO_LOC("\textra version name             %s", EXTRA_VERSION_NAME);
	}
	if (EXTRA_VERSION_DESCRIPTION[0] != '\0') {
		DBG_NO_LOC("\textra version description:\n\t%s", EXTRA_VERSION_DESCRIPTION);
	}
	if (EXTRA_VERSION_PATCHES[0] != '\0') {
		DBG_NO_LOC("\textra version patches:\n\t%s", EXTRA_VERSION_PATCHES);
	}
	DBG_NO_LOC("\tverbose:                       %i", config->verbose);
	DBG_NO_LOC("\tverbose consumer:              %i", config->verbose_consumer);
	DBG_NO_LOC("\tquiet mode:                    %s", config->quiet ? "True" : "False");
	if (config->agent_tcp_port.begin == config->agent_tcp_port.end) {
		DBG_NO_LOC("\tagent_tcp_port:                %i", config->agent_tcp_port.begin);
	} else {
		DBG_NO_LOC("\tagent_tcp_port:                [%i, %i]",
				config->agent_tcp_port.begin,
				config->agent_tcp_port.end);
	}
	DBG_NO_LOC("\tapplication socket timeout:    %i", config->app_socket_timeout);
	DBG_NO_LOC("\tno-kernel:                     %s", config->no_kernel ? "True" : "False");
	DBG_NO_LOC("\tbackground:                    %s", config->background ? "True" : "False");
	DBG_NO_LOC("\tdaemonize:                     %s", config->daemonize ? "True" : "False");
	DBG_NO_LOC("\tsignal parent on start:        %s", config->sig_parent ? "True" : "False");
	DBG_NO_LOC("\ttracing group name:            %s", config->tracing_group_name.value ? : "Unknown");
	DBG_NO_LOC("\tkmod_probe_list:               %s", config->kmod_probes_list.value ? : "None");
	DBG_NO_LOC("\tkmod_extra_probe_list:         %s", config->kmod_extra_probes_list.value ? : "None");
	DBG_NO_LOC("\trundir:                        %s", config->rundir.value ? : "Unknown");
	DBG_NO_LOC("\tapplication socket path:       %s", config->apps_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tclient socket path:            %s", config->client_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\twait shm path:                 %s", config->wait_shm_path.value ? : "Unknown");
	DBG_NO_LOC("\thealth socket path:            %s", config->health_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tLTTNG_UST_CLOCK_PLUGIN:        %s", config->lttng_ust_clock_plugin.value ? : "None");
	DBG_NO_LOC("\tpid file path:                 %s", config->pid_file_path.value ? : "Unknown");
	DBG_NO_LOC("\tlock file path:                %s", config->lock_file_path.value ? : "Unknown");
	DBG_NO_LOC("\tsession load path:             %s", config->load_session_path.value ? : "None");
	DBG_NO_LOC("\tagent port file path:          %s", config->agent_port_file_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 path:              %s", config->consumerd32_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 bin path:          %s", config->consumerd32_bin_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 lib dir:           %s", config->consumerd32_lib_dir.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 err unix sock path:%s", config->consumerd32_err_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 cmd unix sock path:%s", config->consumerd32_cmd_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 path:              %s", config->consumerd64_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 bin path:          %s", config->consumerd64_bin_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 lib dir:           %s", config->consumerd64_lib_dir.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 err unix sock path:%s", config->consumerd64_err_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 cmd unix sock path:%s", config->consumerd64_cmd_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tkconsumerd path:               %s", config->kconsumerd_path.value ? : "Unknown");
	DBG_NO_LOC("\tkconsumerd err unix sock path: %s", config->kconsumerd_err_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tkconsumerd cmd unix sock path: %s", config->kconsumerd_cmd_unix_sock_path.value ? : "Unknown");
}
Commit	Line	Data
e6142f2e JG	1	/*
	2	* Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License, version 2 only,
	6	* as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along
	14	* with this program; if not, write to the Free Software Foundation, Inc.,
	15	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
a3bc3918	18	#include "version.h"
e6142f2e JG	19	#include "sessiond-config.h"
	20	#include <assert.h>
	21	#include "lttng-ust-ctl.h"
	22	#include <common/defaults.h>
	23	#include <limits.h>
	24	#include <errno.h>
	25	#include <ctype.h>
	26	#include <common/error.h>
	27	#include <common/utils.h>
	28	#include <common/compat/getenv.h>
	29
	30	static
	31	struct sessiond_config sessiond_config_build_defaults = {
	32	.quiet = false,
	33	.verbose = 0,
	34	.verbose_consumer = 0,
	35
2288467f	36	.agent_tcp_port = { .begin = DEFAULT_AGENT_TCP_PORT_RANGE_BEGIN, .end = DEFAULT_AGENT_TCP_PORT_RANGE_END },
e6142f2e JG	37	.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT,
	38
	39	.no_kernel = false,
	40	.background = false,
	41	.daemonize = false,
	42	.sig_parent = false,
	43
	44	.tracing_group_name.value = DEFAULT_TRACING_GROUP,
	45	.kmod_probes_list.value = NULL,
	46	.kmod_extra_probes_list.value = NULL,
	47
	48	.rundir.value = NULL,
	49
	50	.apps_unix_sock_path.value = NULL,
	51	.client_unix_sock_path.value = NULL,
	52	.wait_shm_path.value = NULL,
	53	.health_unix_sock_path.value = NULL,
	54	.lttng_ust_clock_plugin.value = NULL,
	55	.pid_file_path.value = NULL,
	56	.lock_file_path.value = NULL,
	57	.agent_port_file_path.value = NULL,
	58	.load_session_path.value = NULL,
	59
	60	.consumerd32_path.value = NULL,
	61	.consumerd32_bin_path.value = NULL,
	62	.consumerd32_lib_dir.value = NULL,
	63	.consumerd32_err_unix_sock_path.value = NULL,
	64	.consumerd32_cmd_unix_sock_path.value = NULL,
	65
	66	.consumerd64_path.value = NULL,
	67	.consumerd64_bin_path.value = NULL,
	68	.consumerd64_lib_dir.value = NULL,
	69	.consumerd64_err_unix_sock_path.value = NULL,
	70	.consumerd64_cmd_unix_sock_path.value = NULL,
	71
	72	.kconsumerd_path.value = NULL,
	73	.kconsumerd_err_unix_sock_path.value = NULL,
	74	.kconsumerd_cmd_unix_sock_path.value = NULL,
	75	};
	76
	77	static
	78	void config_string_fini(struct config_string *str)
	79	{
	80	config_string_set(str, NULL);
	81	}
	82
	83	static
	84	void config_string_set_static(struct config_string *config_str,
	85	const char *value)
	86	{
	87	config_string_set(config_str, (char *) value);
	88	config_str->should_free = false;
	89	}
	90
	91	/* Only use for dynamically-allocated strings. */
	92	LTTNG_HIDDEN
	93	void config_string_set(struct config_string config_str, char value)
	94	{
	95	assert(config_str);
	96	if (config_str->should_free) {
	97	free(config_str->value);
	98	config_str->should_free = false;
	99	}
	100
101	config_str->should_free = !!value;
102	config_str->value = value;
103	}
104
105	LTTNG_HIDDEN
106	int sessiond_config_apply_env_config(struct sessiond_config *config)
107	{
108	int ret = 0;
109	const char *env_value;
110
111	env_value = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV);
112	if (env_value) {
113	char *endptr;
114	long int_val;
115
116	errno = 0;
117	int_val = strtoul(env_value, &endptr, 0);
118	if (errno != 0 \|\| int_val > INT_MAX \|\|
119	(int_val < 0 && int_val != -1)) {
120	ERR("Invalid value \"%s\" used for \"%s\" environment variable",
121	env_value, DEFAULT_APP_SOCKET_TIMEOUT_ENV);
122	ret = -1;
123	goto end;
124	}
125
126	config->app_socket_timeout = int_val;
127	}
128
129	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN");
130	if (env_value) {
131	config_string_set_static(&config->consumerd32_bin_path,
132	env_value);
133	}
134	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN");
135	if (env_value) {
136	config_string_set_static(&config->consumerd64_bin_path,
137	env_value);
138	}
139
140	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR");
141	if (env_value) {
142	config_string_set_static(&config->consumerd32_lib_dir,
143	env_value);
144	}
145	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR");
146	if (env_value) {
147	config_string_set_static(&config->consumerd64_lib_dir,
148	env_value);
149	}
150
151	env_value = lttng_secure_getenv("LTTNG_UST_CLOCK_PLUGIN");
152	if (env_value) {
153	config_string_set_static(&config->lttng_ust_clock_plugin,
154	env_value);
155	}
156
157	env_value = lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES);
158	if (env_value) {
159	config_string_set_static(&config->kmod_probes_list,
160	env_value);
161	}
162
163	env_value = lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES);
164	if (env_value) {
165	config_string_set_static(&config->kmod_extra_probes_list,
166	env_value);
167	}
168	end:
169	return ret;
170	}
171
172	static
173	int config_set_paths_root(struct sessiond_config *config)
174	{
175	int ret = 0;
176
177	config_string_set(&config->rundir, strdup(DEFAULT_LTTNG_RUNDIR));
178	if (!config->rundir.value) {
179	ERR("Failed to set rundir");
180	ret = -1;
181	goto end;
182	}
183
184	config_string_set_static(&config->apps_unix_sock_path,
185	DEFAULT_GLOBAL_APPS_UNIX_SOCK);
186	config_string_set_static(&config->client_unix_sock_path,
187	DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
188	config_string_set_static(&config->wait_shm_path,
189	DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH);
190	config_string_set_static(&config->health_unix_sock_path,
191	DEFAULT_GLOBAL_HEALTH_UNIX_SOCK);
e6142f2e JG	192	end:
	193	return ret;
	194	}
	195
	196	static
	197	int config_set_paths_non_root(struct sessiond_config *config)
	198	{
	199	int ret = 0;
	200	const char *home_path = utils_get_home_dir();
	201	char *str;
	202
	203	if (home_path == NULL) {
	204	ERR("Can't get HOME directory for sockets creation.");
	205	ret = -1;
	206	goto end;
	207	}
	208
	209	/*
	210	* Create rundir from home path. This will create something like
	211	* $HOME/.lttng
	212	*/
	213	ret = asprintf(&str, DEFAULT_LTTNG_HOME_RUNDIR, home_path);
	214	if (ret < 0) {
	215	ERR("Failed to set rundir");
	216	goto end;
	217	}
	218	config_string_set(&config->rundir, str);
	219	str = NULL;
	220
	221	ret = asprintf(&str, DEFAULT_HOME_APPS_UNIX_SOCK, home_path);
	222	if (ret < 0) {
	223	ERR("Failed to set default home apps unix socket path");
	224	goto end;
	225	}
	226	config_string_set(&config->apps_unix_sock_path, str);
	227	str = NULL;
	228
	229	ret = asprintf(&str, DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path);
	230	if (ret < 0) {
	231	ERR("Failed to set default home client unix socket path");
	232	goto end;
	233	}
	234	config_string_set(&config->client_unix_sock_path, str);
	235	str = NULL;
	236
	237	ret = asprintf(&str, DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid());
	238	if (ret < 0) {
	239	ERR("Failed to set default home apps wait shm path");
	240	goto end;
	241	}
	242	config_string_set(&config->wait_shm_path, str);
	243	str = NULL;
	244
	245	ret = asprintf(&str, DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path);
	246	if (ret < 0) {
	247	ERR("Failed to set default home health UNIX socket path");
	248	goto end;
	249	}
	250	config_string_set(&config->health_unix_sock_path, str);
	251	str = NULL;
	252
	253	ret = 0;
	254	end:
	255	return ret;
256	}
257
258	LTTNG_HIDDEN
259	int sessiond_config_init(struct sessiond_config *config)
260	{
261	int ret;
262	bool is_root = (getuid() == 0);
263	char *str;
264
265	assert(config);
266	memcpy(config, &sessiond_config_build_defaults, sizeof(*config));
267
268	if (is_root) {
269	ret = config_set_paths_root(config);
270	} else {
271	ret = config_set_paths_non_root(config);
272	}
2a9f757b	273	if (ret < 0) {
c9a2957d	274	goto error;
2a9f757b	275	}
e6142f2e JG	276
	277	/* 32 bits consumerd path setup */
	278	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_PATH,
	279	config->rundir.value);
	280	if (ret < 0) {
	281	ERR("Failed to set 32-bit consumer path");
c9a2957d	282	goto error;
e6142f2e JG	283	}
	284	config_string_set(&config->consumerd32_path, str);
	285	str = NULL;
	286
	287	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
	288	config->rundir.value);
	289	if (ret < 0) {
	290	ERR("Failed to set 32-bit consumer error socket path");
c9a2957d	291	goto error;
e6142f2e JG	292	}
	293	config_string_set(&config->consumerd32_err_unix_sock_path, str);
	294	str = NULL;
	295
	296	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
	297	config->rundir.value);
	298	if (ret < 0) {
	299	ERR("Failed to set 32-bit consumer command socket path");
c9a2957d	300	goto error;
e6142f2e JG	301	}
	302	config_string_set(&config->consumerd32_cmd_unix_sock_path, str);
	303	str = NULL;
	304
	305	/* 64 bits consumerd path setup */
	306	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_PATH,
	307	config->rundir.value);
	308	if (ret < 0) {
	309	ERR("Failed to set 64-bit consumer path");
c9a2957d	310	goto error;
e6142f2e JG	311	}
	312	config_string_set(&config->consumerd64_path, str);
	313	str = NULL;
	314
	315	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
	316	config->rundir.value);
	317	if (ret < 0) {
	318	ERR("Failed to set 64-bit consumer error socket path");
c9a2957d	319	goto error;
e6142f2e JG	320	}
	321	config_string_set(&config->consumerd64_err_unix_sock_path, str);
	322	str = NULL;
	323
	324	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
	325	config->rundir.value);
	326	if (ret < 0) {
	327	ERR("Failed to set 64-bit consumer command socket path");
c9a2957d	328	goto error;
e6142f2e JG	329	}
	330	config_string_set(&config->consumerd64_cmd_unix_sock_path, str);
	331	str = NULL;
	332
	333	/* kconsumerd consumerd path setup */
	334	ret = asprintf(&str, DEFAULT_KCONSUMERD_PATH,
	335	config->rundir.value);
	336	if (ret < 0) {
	337	ERR("Failed to set kernel consumer path");
c9a2957d	338	goto error;
e6142f2e JG	339	}
	340	config_string_set(&config->kconsumerd_path, str);
	341	str = NULL;
	342
4a08b740 JG	343	ret = asprintf(&str, DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
	344	config->rundir.value);
	345	if (ret < 0) {
	346	ERR("Failed to set kernel consumer error socket path");
c9a2957d	347	goto error;
4a08b740 JG	348	}
	349	config_string_set(&config->kconsumerd_err_unix_sock_path, str);
	350	str = NULL;
	351
	352	ret = asprintf(&str, DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
	353	config->rundir.value);
	354	if (ret < 0) {
	355	ERR("Failed to set kernel consumer command socket path");
c9a2957d	356	goto error;
4a08b740 JG	357	}
	358	config_string_set(&config->kconsumerd_cmd_unix_sock_path, str);
	359	str = NULL;
	360
e6142f2e JG	361	ret = asprintf(&str, "%s/%s", config->rundir.value,
	362	DEFAULT_LTTNG_SESSIOND_PIDFILE);
	363	if (ret < 0) {
	364	ERR("Failed to set PID file path");
c9a2957d	365	goto error;
e6142f2e JG	366	}
	367	config_string_set(&config->pid_file_path, str);
	368	str = NULL;
	369
	370	ret = asprintf(&str, "%s/%s", config->rundir.value,
	371	DEFAULT_LTTNG_SESSIOND_LOCKFILE);
	372	if (ret < 0) {
	373	ERR("Failed to set lock file path");
c9a2957d	374	goto error;
e6142f2e JG	375	}
	376	config_string_set(&config->lock_file_path, str);
	377	str = NULL;
	378
	379	ret = asprintf(&str, "%s/%s", config->rundir.value,
	380	DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE);
	381	if (ret < 0) {
	382	ERR("Failed to set agent port file path");
c9a2957d	383	goto error;
e6142f2e JG	384	}
	385	config_string_set(&config->agent_port_file_path, str);
	386	str = NULL;
	387
	388	/*
	389	* Allow INSTALL_BIN_PATH to be used as a target path for the
	390	* native architecture size consumer if CONFIG_CONSUMER*_PATH
	391	* has not been defined.
	392	*/
	393	#if (CAA_BITS_PER_LONG == 32)
	394	config_string_set_static(&config->consumerd32_bin_path,
	395	INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	396	config_string_set_static(&config->consumerd32_lib_dir,
	397	INSTALL_LIB_PATH);
	398	#elif (CAA_BITS_PER_LONG == 64)
	399	config_string_set_static(&config->consumerd64_bin_path,
	400	INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	401	config_string_set_static(&config->consumerd64_lib_dir,
	402	INSTALL_LIB_PATH);
	403	#else
	404	#error "Unknown bitness"
	405	#endif
	406	ret = 0;
c9a2957d JG	407	return ret;
	408	error:
	409	sessiond_config_fini(config);
e6142f2e JG	410	return ret;
	411	}
	412
	413	LTTNG_HIDDEN
	414	void sessiond_config_fini(struct sessiond_config *config)
	415	{
	416	config_string_fini(&config->tracing_group_name);
	417	config_string_fini(&config->kmod_probes_list);
	418	config_string_fini(&config->kmod_extra_probes_list);
16ffecdb	419	config_string_fini(&config->rundir);
e6142f2e JG	420	config_string_fini(&config->apps_unix_sock_path);
	421	config_string_fini(&config->client_unix_sock_path);
	422	config_string_fini(&config->wait_shm_path);
	423	config_string_fini(&config->health_unix_sock_path);
	424	config_string_fini(&config->lttng_ust_clock_plugin);
	425	config_string_fini(&config->pid_file_path);
	426	config_string_fini(&config->lock_file_path);
	427	config_string_fini(&config->load_session_path);
	428	config_string_fini(&config->agent_port_file_path);
	429	config_string_fini(&config->consumerd32_path);
	430	config_string_fini(&config->consumerd32_bin_path);
	431	config_string_fini(&config->consumerd32_lib_dir);
	432	config_string_fini(&config->consumerd32_err_unix_sock_path);
	433	config_string_fini(&config->consumerd32_cmd_unix_sock_path);
	434	config_string_fini(&config->consumerd64_path);
	435	config_string_fini(&config->consumerd64_bin_path);
	436	config_string_fini(&config->consumerd64_lib_dir);
	437	config_string_fini(&config->consumerd64_err_unix_sock_path);
	438	config_string_fini(&config->consumerd64_cmd_unix_sock_path);
	439	config_string_fini(&config->kconsumerd_path);
	440	config_string_fini(&config->kconsumerd_err_unix_sock_path);
	441	config_string_fini(&config->kconsumerd_cmd_unix_sock_path);
	442	}
	443
	444	static
	445	int resolve_path(struct config_string *path)
	446	{
	447	int ret = 0;
	448	char *absolute_path;
	449
	450	if (!path->value \|\| path->value[0] == '/') {
	451	goto end;
	452	}
	453
	454	absolute_path = utils_expand_path(path->value);
	455	if (!absolute_path) {
	456	ret = -1;
	457	goto end;
	458	}
	459
	460	config_string_set(path, absolute_path);
	461	end:
	462	return ret;
	463	}
	464
	465	#define RESOLVE_CHECK(path_config_str) \
	466	if (resolve_path(path_config_str)) \
	467	return -1
	468
	469	LTTNG_HIDDEN
	470	int sessiond_config_resolve_paths(struct sessiond_config *config)
	471	{
	472	RESOLVE_CHECK(&config->apps_unix_sock_path);
	473	RESOLVE_CHECK(&config->client_unix_sock_path);
	474	RESOLVE_CHECK(&config->wait_shm_path);
	475	RESOLVE_CHECK(&config->health_unix_sock_path);
	476	RESOLVE_CHECK(&config->lttng_ust_clock_plugin);
	477	RESOLVE_CHECK(&config->pid_file_path);
	478	RESOLVE_CHECK(&config->lock_file_path);
	479	RESOLVE_CHECK(&config->load_session_path);
	480	RESOLVE_CHECK(&config->agent_port_file_path);
	481	RESOLVE_CHECK(&config->consumerd32_path);
	482	RESOLVE_CHECK(&config->consumerd32_bin_path);
	483	RESOLVE_CHECK(&config->consumerd32_lib_dir);
484	RESOLVE_CHECK(&config->consumerd32_err_unix_sock_path);
485	RESOLVE_CHECK(&config->consumerd32_cmd_unix_sock_path);
486	RESOLVE_CHECK(&config->consumerd64_path);
487	RESOLVE_CHECK(&config->consumerd64_bin_path);
488	RESOLVE_CHECK(&config->consumerd64_lib_dir);
489	RESOLVE_CHECK(&config->consumerd64_err_unix_sock_path);
490	RESOLVE_CHECK(&config->consumerd64_cmd_unix_sock_path);
491	RESOLVE_CHECK(&config->kconsumerd_path);
492	RESOLVE_CHECK(&config->kconsumerd_err_unix_sock_path);
493	RESOLVE_CHECK(&config->kconsumerd_cmd_unix_sock_path);
494	return 0;
495	}
496
497	LTTNG_HIDDEN
498	void sessiond_config_log(struct sessiond_config *config)
499	{
500	DBG_NO_LOC("[sessiond configuration]");
a3bc3918 JR	501	DBG_NO_LOC("\tversion %s", VERSION);
	502	if (GIT_VERSION[0] != '\0') {
	503	DBG_NO_LOC("\tgit version %s", GIT_VERSION);
	504	}
	505	if (EXTRA_VERSION_NAME[0] != '\0') {
	506	DBG_NO_LOC("\textra version name %s", EXTRA_VERSION_NAME);
	507	}
	508	if (EXTRA_VERSION_DESCRIPTION[0] != '\0') {
	509	DBG_NO_LOC("\textra version description:\n\t%s", EXTRA_VERSION_DESCRIPTION);
	510	}
7f5ed73a JR	511	if (EXTRA_VERSION_PATCHES[0] != '\0') {
	512	DBG_NO_LOC("\textra version patches:\n\t%s", EXTRA_VERSION_PATCHES);
	513	}
2ca43cb1 JR	514	DBG_NO_LOC("\tverbose: %i", config->verbose);
	515	DBG_NO_LOC("\tverbose consumer: %i", config->verbose_consumer);
	516	DBG_NO_LOC("\tquiet mode: %s", config->quiet ? "True" : "False");
2288467f	517	if (config->agent_tcp_port.begin == config->agent_tcp_port.end) {
2ca43cb1	518	DBG_NO_LOC("\tagent_tcp_port: %i", config->agent_tcp_port.begin);
2288467f	519	} else {
2ca43cb1	520	DBG_NO_LOC("\tagent_tcp_port: [%i, %i]",
2288467f JG	521	config->agent_tcp_port.begin,
	522	config->agent_tcp_port.end);
	523	}
2ca43cb1 JR	524	DBG_NO_LOC("\tapplication socket timeout: %i", config->app_socket_timeout);
	525	DBG_NO_LOC("\tno-kernel: %s", config->no_kernel ? "True" : "False");
	526	DBG_NO_LOC("\tbackground: %s", config->background ? "True" : "False");
	527	DBG_NO_LOC("\tdaemonize: %s", config->daemonize ? "True" : "False");
	528	DBG_NO_LOC("\tsignal parent on start: %s", config->sig_parent ? "True" : "False");
	529	DBG_NO_LOC("\ttracing group name: %s", config->tracing_group_name.value ? : "Unknown");
	530	DBG_NO_LOC("\tkmod_probe_list: %s", config->kmod_probes_list.value ? : "None");
	531	DBG_NO_LOC("\tkmod_extra_probe_list: %s", config->kmod_extra_probes_list.value ? : "None");
	532	DBG_NO_LOC("\trundir: %s", config->rundir.value ? : "Unknown");
	533	DBG_NO_LOC("\tapplication socket path: %s", config->apps_unix_sock_path.value ? : "Unknown");
	534	DBG_NO_LOC("\tclient socket path: %s", config->client_unix_sock_path.value ? : "Unknown");
	535	DBG_NO_LOC("\twait shm path: %s", config->wait_shm_path.value ? : "Unknown");
	536	DBG_NO_LOC("\thealth socket path: %s", config->health_unix_sock_path.value ? : "Unknown");
	537	DBG_NO_LOC("\tLTTNG_UST_CLOCK_PLUGIN: %s", config->lttng_ust_clock_plugin.value ? : "None");
	538	DBG_NO_LOC("\tpid file path: %s", config->pid_file_path.value ? : "Unknown");
	539	DBG_NO_LOC("\tlock file path: %s", config->lock_file_path.value ? : "Unknown");
	540	DBG_NO_LOC("\tsession load path: %s", config->load_session_path.value ? : "None");
	541	DBG_NO_LOC("\tagent port file path: %s", config->agent_port_file_path.value ? : "Unknown");
	542	DBG_NO_LOC("\tconsumerd32 path: %s", config->consumerd32_path.value ? : "Unknown");
	543	DBG_NO_LOC("\tconsumerd32 bin path: %s", config->consumerd32_bin_path.value ? : "Unknown");
	544	DBG_NO_LOC("\tconsumerd32 lib dir: %s", config->consumerd32_lib_dir.value ? : "Unknown");
	545	DBG_NO_LOC("\tconsumerd32 err unix sock path:%s", config->consumerd32_err_unix_sock_path.value ? : "Unknown");
	546	DBG_NO_LOC("\tconsumerd32 cmd unix sock path:%s", config->consumerd32_cmd_unix_sock_path.value ? : "Unknown");
	547	DBG_NO_LOC("\tconsumerd64 path: %s", config->consumerd64_path.value ? : "Unknown");
	548	DBG_NO_LOC("\tconsumerd64 bin path: %s", config->consumerd64_bin_path.value ? : "Unknown");
	549	DBG_NO_LOC("\tconsumerd64 lib dir: %s", config->consumerd64_lib_dir.value ? : "Unknown");
	550	DBG_NO_LOC("\tconsumerd64 err unix sock path:%s", config->consumerd64_err_unix_sock_path.value ? : "Unknown");
	551	DBG_NO_LOC("\tconsumerd64 cmd unix sock path:%s", config->consumerd64_cmd_unix_sock_path.value ? : "Unknown");
	552	DBG_NO_LOC("\tkconsumerd path: %s", config->kconsumerd_path.value ? : "Unknown");
	553	DBG_NO_LOC("\tkconsumerd err unix sock path: %s", config->kconsumerd_err_unix_sock_path.value ? : "Unknown");
	554	DBG_NO_LOC("\tkconsumerd cmd unix sock path: %s", config->kconsumerd_cmd_unix_sock_path.value ? : "Unknown");
e6142f2e	555	}