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