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

/*
 * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#include "version.h"
#include "sessiond-config.h"
#include <assert.h>
#include "lttng-ust-ctl.h"
#include <common/defaults.h>
#include <limits.h>
#include <ctype.h>
#include <common/error.h>
#include <common/utils.h>
#include <common/path.h>
#include <common/compat/errno.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 },
	.event_notifier_buffer_size_kernel =	DEFAULT_EVENT_NOTIFIER_ERROR_COUNT_MAP_SIZE,
	.event_notifier_buffer_size_userspace =	DEFAULT_EVENT_NOTIFIER_ERROR_COUNT_MAP_SIZE,
	.app_socket_timeout = 			DEFAULT_APP_SOCKET_RW_TIMEOUT,

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

	.tracing_group_name.value = 		(char *) 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	1	/*
ab5be9fa	2	* Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
e6142f2e	3	*
ab5be9fa	4	* SPDX-License-Identifier: GPL-2.0-only
e6142f2e	5	*
e6142f2e JG	6	*/
e6142f2e JG	7
a3bc3918	8	#include "version.h"
e6142f2e JG	9	#include "sessiond-config.h"
	10	#include <assert.h>
	11	#include "lttng-ust-ctl.h"
	12	#include <common/defaults.h>
	13	#include <limits.h>
e6142f2e JG	14	#include <ctype.h>
	15	#include <common/error.h>
	16	#include <common/utils.h>
4b082b12	17	#include <common/path.h>
edf4b93e	18	#include <common/compat/errno.h>
e6142f2e JG	19	#include <common/compat/getenv.h>
	20
	21	static
	22	struct sessiond_config sessiond_config_build_defaults = {
	23	.quiet = false,
	24	.verbose = 0,
	25	.verbose_consumer = 0,
	26
2288467f	27	.agent_tcp_port = { .begin = DEFAULT_AGENT_TCP_PORT_RANGE_BEGIN, .end = DEFAULT_AGENT_TCP_PORT_RANGE_END },
761ffce2 FD	28	.event_notifier_buffer_size_kernel = DEFAULT_EVENT_NOTIFIER_ERROR_COUNT_MAP_SIZE,
761ffce2 FD	29	.event_notifier_buffer_size_userspace = DEFAULT_EVENT_NOTIFIER_ERROR_COUNT_MAP_SIZE,
e6142f2e JG	30	.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT,
	31
	32	.no_kernel = false,
	33	.background = false,
	34	.daemonize = false,
	35	.sig_parent = false,
	36
b53d4e59	37	.tracing_group_name.value = (char *) DEFAULT_TRACING_GROUP,
e6142f2e JG	38	.kmod_probes_list.value = NULL,
	39	.kmod_extra_probes_list.value = NULL,
	40
	41	.rundir.value = NULL,
	42
	43	.apps_unix_sock_path.value = NULL,
	44	.client_unix_sock_path.value = NULL,
	45	.wait_shm_path.value = NULL,
	46	.health_unix_sock_path.value = NULL,
	47	.lttng_ust_clock_plugin.value = NULL,
	48	.pid_file_path.value = NULL,
	49	.lock_file_path.value = NULL,
	50	.agent_port_file_path.value = NULL,
	51	.load_session_path.value = NULL,
	52
	53	.consumerd32_path.value = NULL,
	54	.consumerd32_bin_path.value = NULL,
	55	.consumerd32_lib_dir.value = NULL,
	56	.consumerd32_err_unix_sock_path.value = NULL,
	57	.consumerd32_cmd_unix_sock_path.value = NULL,
	58
	59	.consumerd64_path.value = NULL,
	60	.consumerd64_bin_path.value = NULL,
	61	.consumerd64_lib_dir.value = NULL,
	62	.consumerd64_err_unix_sock_path.value = NULL,
	63	.consumerd64_cmd_unix_sock_path.value = NULL,
	64
	65	.kconsumerd_path.value = NULL,
	66	.kconsumerd_err_unix_sock_path.value = NULL,
	67	.kconsumerd_cmd_unix_sock_path.value = NULL,
	68	};
	69
	70	static
	71	void config_string_fini(struct config_string *str)
	72	{
	73	config_string_set(str, NULL);
	74	}
	75
	76	static
	77	void config_string_set_static(struct config_string *config_str,
	78	const char *value)
	79	{
	80	config_string_set(config_str, (char *) value);
	81	config_str->should_free = false;
	82	}
	83
	84	/* Only use for dynamically-allocated strings. */
	85	LTTNG_HIDDEN
	86	void config_string_set(struct config_string config_str, char value)
	87	{
	88	assert(config_str);
	89	if (config_str->should_free) {
	90	free(config_str->value);
	91	config_str->should_free = false;
	92	}
	93
	94	config_str->should_free = !!value;
	95	config_str->value = value;
	96	}
	97
	98	LTTNG_HIDDEN
	99	int sessiond_config_apply_env_config(struct sessiond_config *config)
	100	{
	101	int ret = 0;
102	const char *env_value;
103
104	env_value = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV);
105	if (env_value) {
106	char *endptr;
107	long int_val;
108
109	errno = 0;
110	int_val = strtoul(env_value, &endptr, 0);
111	if (errno != 0 \|\| int_val > INT_MAX \|\|
112	(int_val < 0 && int_val != -1)) {
113	ERR("Invalid value \"%s\" used for \"%s\" environment variable",
114	env_value, DEFAULT_APP_SOCKET_TIMEOUT_ENV);
115	ret = -1;
116	goto end;
117	}
118
119	config->app_socket_timeout = int_val;
120	}
121
122	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN");
123	if (env_value) {
124	config_string_set_static(&config->consumerd32_bin_path,
125	env_value);
126	}
127	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN");
128	if (env_value) {
129	config_string_set_static(&config->consumerd64_bin_path,
130	env_value);
131	}
132
133	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR");
134	if (env_value) {
135	config_string_set_static(&config->consumerd32_lib_dir,
136	env_value);
137	}
138	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR");
139	if (env_value) {
140	config_string_set_static(&config->consumerd64_lib_dir,
141	env_value);
142	}
143
144	env_value = lttng_secure_getenv("LTTNG_UST_CLOCK_PLUGIN");
145	if (env_value) {
146	config_string_set_static(&config->lttng_ust_clock_plugin,
147	env_value);
148	}
149
150	env_value = lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES);
151	if (env_value) {
152	config_string_set_static(&config->kmod_probes_list,
153	env_value);
154	}
155
156	env_value = lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES);
157	if (env_value) {
158	config_string_set_static(&config->kmod_extra_probes_list,
159	env_value);
160	}
161	end:
162	return ret;
163	}
164
165	static
166	int config_set_paths_root(struct sessiond_config *config)
167	{
168	int ret = 0;
169
170	config_string_set(&config->rundir, strdup(DEFAULT_LTTNG_RUNDIR));
171	if (!config->rundir.value) {
172	ERR("Failed to set rundir");
173	ret = -1;
174	goto end;
175	}
176
177	config_string_set_static(&config->apps_unix_sock_path,
178	DEFAULT_GLOBAL_APPS_UNIX_SOCK);
179	config_string_set_static(&config->client_unix_sock_path,
180	DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
181	config_string_set_static(&config->wait_shm_path,
182	DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH);
183	config_string_set_static(&config->health_unix_sock_path,
184	DEFAULT_GLOBAL_HEALTH_UNIX_SOCK);
e6142f2e JG	185	end:
	186	return ret;
	187	}
	188
	189	static
	190	int config_set_paths_non_root(struct sessiond_config *config)
	191	{
	192	int ret = 0;
	193	const char *home_path = utils_get_home_dir();
	194	char *str;
	195
	196	if (home_path == NULL) {
	197	ERR("Can't get HOME directory for sockets creation.");
	198	ret = -1;
	199	goto end;
	200	}
	201
	202	/*
	203	* Create rundir from home path. This will create something like
	204	* $HOME/.lttng
	205	*/
	206	ret = asprintf(&str, DEFAULT_LTTNG_HOME_RUNDIR, home_path);
	207	if (ret < 0) {
	208	ERR("Failed to set rundir");
	209	goto end;
	210	}
	211	config_string_set(&config->rundir, str);
	212	str = NULL;
	213
	214	ret = asprintf(&str, DEFAULT_HOME_APPS_UNIX_SOCK, home_path);
	215	if (ret < 0) {
	216	ERR("Failed to set default home apps unix socket path");
	217	goto end;
	218	}
	219	config_string_set(&config->apps_unix_sock_path, str);
	220	str = NULL;
	221
	222	ret = asprintf(&str, DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path);
	223	if (ret < 0) {
	224	ERR("Failed to set default home client unix socket path");
	225	goto end;
	226	}
	227	config_string_set(&config->client_unix_sock_path, str);
	228	str = NULL;
	229
	230	ret = asprintf(&str, DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid());
	231	if (ret < 0) {
	232	ERR("Failed to set default home apps wait shm path");
	233	goto end;
	234	}
	235	config_string_set(&config->wait_shm_path, str);
	236	str = NULL;
	237
	238	ret = asprintf(&str, DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path);
	239	if (ret < 0) {
	240	ERR("Failed to set default home health UNIX socket path");
	241	goto end;
	242	}
	243	config_string_set(&config->health_unix_sock_path, str);
	244	str = NULL;
	245
	246	ret = 0;
	247	end:
	248	return ret;
249	}
250
251	LTTNG_HIDDEN
252	int sessiond_config_init(struct sessiond_config *config)
253	{
254	int ret;
255	bool is_root = (getuid() == 0);
256	char *str;
257
258	assert(config);
259	memcpy(config, &sessiond_config_build_defaults, sizeof(*config));
260
261	if (is_root) {
262	ret = config_set_paths_root(config);
263	} else {
264	ret = config_set_paths_non_root(config);
265	}
2a9f757b	266	if (ret < 0) {
c9a2957d	267	goto error;
2a9f757b	268	}
e6142f2e JG	269
	270	/* 32 bits consumerd path setup */
	271	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_PATH,
	272	config->rundir.value);
	273	if (ret < 0) {
	274	ERR("Failed to set 32-bit consumer path");
c9a2957d	275	goto error;
e6142f2e JG	276	}
	277	config_string_set(&config->consumerd32_path, str);
	278	str = NULL;
	279
	280	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
	281	config->rundir.value);
	282	if (ret < 0) {
	283	ERR("Failed to set 32-bit consumer error socket path");
c9a2957d	284	goto error;
e6142f2e JG	285	}
	286	config_string_set(&config->consumerd32_err_unix_sock_path, str);
	287	str = NULL;
	288
	289	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
	290	config->rundir.value);
	291	if (ret < 0) {
	292	ERR("Failed to set 32-bit consumer command socket path");
c9a2957d	293	goto error;
e6142f2e JG	294	}
	295	config_string_set(&config->consumerd32_cmd_unix_sock_path, str);
	296	str = NULL;
	297
	298	/* 64 bits consumerd path setup */
	299	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_PATH,
	300	config->rundir.value);
	301	if (ret < 0) {
	302	ERR("Failed to set 64-bit consumer path");
c9a2957d	303	goto error;
e6142f2e JG	304	}
	305	config_string_set(&config->consumerd64_path, str);
	306	str = NULL;
	307
	308	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
	309	config->rundir.value);
	310	if (ret < 0) {
	311	ERR("Failed to set 64-bit consumer error socket path");
c9a2957d	312	goto error;
e6142f2e JG	313	}
	314	config_string_set(&config->consumerd64_err_unix_sock_path, str);
	315	str = NULL;
	316
	317	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
	318	config->rundir.value);
	319	if (ret < 0) {
	320	ERR("Failed to set 64-bit consumer command socket path");
c9a2957d	321	goto error;
e6142f2e JG	322	}
	323	config_string_set(&config->consumerd64_cmd_unix_sock_path, str);
	324	str = NULL;
	325
	326	/* kconsumerd consumerd path setup */
	327	ret = asprintf(&str, DEFAULT_KCONSUMERD_PATH,
	328	config->rundir.value);
	329	if (ret < 0) {
	330	ERR("Failed to set kernel consumer path");
c9a2957d	331	goto error;
e6142f2e JG	332	}
	333	config_string_set(&config->kconsumerd_path, str);
	334	str = NULL;
	335
4a08b740 JG	336	ret = asprintf(&str, DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
	337	config->rundir.value);
	338	if (ret < 0) {
	339	ERR("Failed to set kernel consumer error socket path");
c9a2957d	340	goto error;
4a08b740 JG	341	}
	342	config_string_set(&config->kconsumerd_err_unix_sock_path, str);
	343	str = NULL;
	344
	345	ret = asprintf(&str, DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
	346	config->rundir.value);
	347	if (ret < 0) {
	348	ERR("Failed to set kernel consumer command socket path");
c9a2957d	349	goto error;
4a08b740 JG	350	}
	351	config_string_set(&config->kconsumerd_cmd_unix_sock_path, str);
	352	str = NULL;
	353
e6142f2e JG	354	ret = asprintf(&str, "%s/%s", config->rundir.value,
	355	DEFAULT_LTTNG_SESSIOND_PIDFILE);
	356	if (ret < 0) {
	357	ERR("Failed to set PID file path");
c9a2957d	358	goto error;
e6142f2e JG	359	}
	360	config_string_set(&config->pid_file_path, str);
	361	str = NULL;
	362
	363	ret = asprintf(&str, "%s/%s", config->rundir.value,
	364	DEFAULT_LTTNG_SESSIOND_LOCKFILE);
	365	if (ret < 0) {
	366	ERR("Failed to set lock file path");
c9a2957d	367	goto error;
e6142f2e JG	368	}
	369	config_string_set(&config->lock_file_path, str);
	370	str = NULL;
	371
	372	ret = asprintf(&str, "%s/%s", config->rundir.value,
	373	DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE);
	374	if (ret < 0) {
	375	ERR("Failed to set agent port file path");
c9a2957d	376	goto error;
e6142f2e JG	377	}
	378	config_string_set(&config->agent_port_file_path, str);
	379	str = NULL;
	380
	381	/*
	382	* Allow INSTALL_BIN_PATH to be used as a target path for the
	383	* native architecture size consumer if CONFIG_CONSUMER*_PATH
	384	* has not been defined.
	385	*/
	386	#if (CAA_BITS_PER_LONG == 32)
	387	config_string_set_static(&config->consumerd32_bin_path,
	388	INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	389	config_string_set_static(&config->consumerd32_lib_dir,
	390	INSTALL_LIB_PATH);
	391	#elif (CAA_BITS_PER_LONG == 64)
	392	config_string_set_static(&config->consumerd64_bin_path,
	393	INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	394	config_string_set_static(&config->consumerd64_lib_dir,
	395	INSTALL_LIB_PATH);
	396	#else
	397	#error "Unknown bitness"
	398	#endif
	399	ret = 0;
c9a2957d JG	400	return ret;
	401	error:
	402	sessiond_config_fini(config);
e6142f2e JG	403	return ret;
	404	}
	405
	406	LTTNG_HIDDEN
	407	void sessiond_config_fini(struct sessiond_config *config)
	408	{
	409	config_string_fini(&config->tracing_group_name);
	410	config_string_fini(&config->kmod_probes_list);
	411	config_string_fini(&config->kmod_extra_probes_list);
16ffecdb	412	config_string_fini(&config->rundir);
e6142f2e JG	413	config_string_fini(&config->apps_unix_sock_path);
	414	config_string_fini(&config->client_unix_sock_path);
	415	config_string_fini(&config->wait_shm_path);
	416	config_string_fini(&config->health_unix_sock_path);
	417	config_string_fini(&config->lttng_ust_clock_plugin);
	418	config_string_fini(&config->pid_file_path);
	419	config_string_fini(&config->lock_file_path);
	420	config_string_fini(&config->load_session_path);
	421	config_string_fini(&config->agent_port_file_path);
	422	config_string_fini(&config->consumerd32_path);
	423	config_string_fini(&config->consumerd32_bin_path);
	424	config_string_fini(&config->consumerd32_lib_dir);
	425	config_string_fini(&config->consumerd32_err_unix_sock_path);
	426	config_string_fini(&config->consumerd32_cmd_unix_sock_path);
	427	config_string_fini(&config->consumerd64_path);
	428	config_string_fini(&config->consumerd64_bin_path);
	429	config_string_fini(&config->consumerd64_lib_dir);
	430	config_string_fini(&config->consumerd64_err_unix_sock_path);
	431	config_string_fini(&config->consumerd64_cmd_unix_sock_path);
	432	config_string_fini(&config->kconsumerd_path);
	433	config_string_fini(&config->kconsumerd_err_unix_sock_path);
	434	config_string_fini(&config->kconsumerd_cmd_unix_sock_path);
	435	}
	436
	437	static
	438	int resolve_path(struct config_string *path)
	439	{
	440	int ret = 0;
	441	char *absolute_path;
	442
	443	if (!path->value \|\| path->value[0] == '/') {
	444	goto end;
	445	}
	446
	447	absolute_path = utils_expand_path(path->value);
	448	if (!absolute_path) {
	449	ret = -1;
	450	goto end;
	451	}
	452
	453	config_string_set(path, absolute_path);
	454	end:
	455	return ret;
	456	}
	457
	458	#define RESOLVE_CHECK(path_config_str) \
	459	if (resolve_path(path_config_str)) \
	460	return -1
	461
	462	LTTNG_HIDDEN
	463	int sessiond_config_resolve_paths(struct sessiond_config *config)
	464	{
	465	RESOLVE_CHECK(&config->apps_unix_sock_path);
	466	RESOLVE_CHECK(&config->client_unix_sock_path);
	467	RESOLVE_CHECK(&config->wait_shm_path);
	468	RESOLVE_CHECK(&config->health_unix_sock_path);
	469	RESOLVE_CHECK(&config->lttng_ust_clock_plugin);
	470	RESOLVE_CHECK(&config->pid_file_path);
	471	RESOLVE_CHECK(&config->lock_file_path);
	472	RESOLVE_CHECK(&config->load_session_path);
	473	RESOLVE_CHECK(&config->agent_port_file_path);
	474	RESOLVE_CHECK(&config->consumerd32_path);
	475	RESOLVE_CHECK(&config->consumerd32_bin_path);
	476	RESOLVE_CHECK(&config->consumerd32_lib_dir);
477	RESOLVE_CHECK(&config->consumerd32_err_unix_sock_path);
478	RESOLVE_CHECK(&config->consumerd32_cmd_unix_sock_path);
479	RESOLVE_CHECK(&config->consumerd64_path);
480	RESOLVE_CHECK(&config->consumerd64_bin_path);
481	RESOLVE_CHECK(&config->consumerd64_lib_dir);
482	RESOLVE_CHECK(&config->consumerd64_err_unix_sock_path);
483	RESOLVE_CHECK(&config->consumerd64_cmd_unix_sock_path);
484	RESOLVE_CHECK(&config->kconsumerd_path);
485	RESOLVE_CHECK(&config->kconsumerd_err_unix_sock_path);
486	RESOLVE_CHECK(&config->kconsumerd_cmd_unix_sock_path);
487	return 0;
488	}
489
490	LTTNG_HIDDEN
491	void sessiond_config_log(struct sessiond_config *config)
492	{
493	DBG_NO_LOC("[sessiond configuration]");
a3bc3918 JR	494	DBG_NO_LOC("\tversion %s", VERSION);
	495	if (GIT_VERSION[0] != '\0') {
	496	DBG_NO_LOC("\tgit version %s", GIT_VERSION);
	497	}
	498	if (EXTRA_VERSION_NAME[0] != '\0') {
	499	DBG_NO_LOC("\textra version name %s", EXTRA_VERSION_NAME);
	500	}
	501	if (EXTRA_VERSION_DESCRIPTION[0] != '\0') {
	502	DBG_NO_LOC("\textra version description:\n\t%s", EXTRA_VERSION_DESCRIPTION);
	503	}
7f5ed73a JR	504	if (EXTRA_VERSION_PATCHES[0] != '\0') {
	505	DBG_NO_LOC("\textra version patches:\n\t%s", EXTRA_VERSION_PATCHES);
	506	}
2ca43cb1 JR	507	DBG_NO_LOC("\tverbose: %i", config->verbose);
	508	DBG_NO_LOC("\tverbose consumer: %i", config->verbose_consumer);
	509	DBG_NO_LOC("\tquiet mode: %s", config->quiet ? "True" : "False");
2288467f	510	if (config->agent_tcp_port.begin == config->agent_tcp_port.end) {
2ca43cb1	511	DBG_NO_LOC("\tagent_tcp_port: %i", config->agent_tcp_port.begin);
2288467f	512	} else {
2ca43cb1	513	DBG_NO_LOC("\tagent_tcp_port: [%i, %i]",
2288467f JG	514	config->agent_tcp_port.begin,
	515	config->agent_tcp_port.end);
	516	}
2ca43cb1 JR	517	DBG_NO_LOC("\tapplication socket timeout: %i", config->app_socket_timeout);
	518	DBG_NO_LOC("\tno-kernel: %s", config->no_kernel ? "True" : "False");
	519	DBG_NO_LOC("\tbackground: %s", config->background ? "True" : "False");
	520	DBG_NO_LOC("\tdaemonize: %s", config->daemonize ? "True" : "False");
	521	DBG_NO_LOC("\tsignal parent on start: %s", config->sig_parent ? "True" : "False");
	522	DBG_NO_LOC("\ttracing group name: %s", config->tracing_group_name.value ? : "Unknown");
	523	DBG_NO_LOC("\tkmod_probe_list: %s", config->kmod_probes_list.value ? : "None");
	524	DBG_NO_LOC("\tkmod_extra_probe_list: %s", config->kmod_extra_probes_list.value ? : "None");
	525	DBG_NO_LOC("\trundir: %s", config->rundir.value ? : "Unknown");
	526	DBG_NO_LOC("\tapplication socket path: %s", config->apps_unix_sock_path.value ? : "Unknown");
	527	DBG_NO_LOC("\tclient socket path: %s", config->client_unix_sock_path.value ? : "Unknown");
	528	DBG_NO_LOC("\twait shm path: %s", config->wait_shm_path.value ? : "Unknown");
	529	DBG_NO_LOC("\thealth socket path: %s", config->health_unix_sock_path.value ? : "Unknown");
	530	DBG_NO_LOC("\tLTTNG_UST_CLOCK_PLUGIN: %s", config->lttng_ust_clock_plugin.value ? : "None");
	531	DBG_NO_LOC("\tpid file path: %s", config->pid_file_path.value ? : "Unknown");
	532	DBG_NO_LOC("\tlock file path: %s", config->lock_file_path.value ? : "Unknown");
	533	DBG_NO_LOC("\tsession load path: %s", config->load_session_path.value ? : "None");
	534	DBG_NO_LOC("\tagent port file path: %s", config->agent_port_file_path.value ? : "Unknown");
	535	DBG_NO_LOC("\tconsumerd32 path: %s", config->consumerd32_path.value ? : "Unknown");
	536	DBG_NO_LOC("\tconsumerd32 bin path: %s", config->consumerd32_bin_path.value ? : "Unknown");
	537	DBG_NO_LOC("\tconsumerd32 lib dir: %s", config->consumerd32_lib_dir.value ? : "Unknown");
	538	DBG_NO_LOC("\tconsumerd32 err unix sock path:%s", config->consumerd32_err_unix_sock_path.value ? : "Unknown");
	539	DBG_NO_LOC("\tconsumerd32 cmd unix sock path:%s", config->consumerd32_cmd_unix_sock_path.value ? : "Unknown");
	540	DBG_NO_LOC("\tconsumerd64 path: %s", config->consumerd64_path.value ? : "Unknown");
	541	DBG_NO_LOC("\tconsumerd64 bin path: %s", config->consumerd64_bin_path.value ? : "Unknown");
	542	DBG_NO_LOC("\tconsumerd64 lib dir: %s", config->consumerd64_lib_dir.value ? : "Unknown");
	543	DBG_NO_LOC("\tconsumerd64 err unix sock path:%s", config->consumerd64_err_unix_sock_path.value ? : "Unknown");
	544	DBG_NO_LOC("\tconsumerd64 cmd unix sock path:%s", config->consumerd64_cmd_unix_sock_path.value ? : "Unknown");
	545	DBG_NO_LOC("\tkconsumerd path: %s", config->kconsumerd_path.value ? : "Unknown");
	546	DBG_NO_LOC("\tkconsumerd err unix sock path: %s", config->kconsumerd_err_unix_sock_path.value ? : "Unknown");
	547	DBG_NO_LOC("\tkconsumerd cmd unix sock path: %s", config->kconsumerd_cmd_unix_sock_path.value ? : "Unknown");
e6142f2e	548	}