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