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

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

#include "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 = 			DEFAULT_AGENT_TCP_PORT,
	.app_socket_timeout = 			DEFAULT_APP_SOCKET_RW_TIMEOUT,

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

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

	.rundir.value =				NULL,

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

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

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

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

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

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

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

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

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

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

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

		config->app_socket_timeout = int_val;
	}

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

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

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

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

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

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

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

	config_string_set_static(&config->apps_unix_sock_path,
			DEFAULT_GLOBAL_APPS_UNIX_SOCK);
	config_string_set_static(&config->client_unix_sock_path,
			DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
	config_string_set_static(&config->wait_shm_path,
			DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH);
	config_string_set_static(&config->health_unix_sock_path,
			DEFAULT_GLOBAL_HEALTH_UNIX_SOCK);
	config_string_set_static(&config->kconsumerd_err_unix_sock_path,
			DEFAULT_KCONSUMERD_ERR_SOCK_PATH);
	config_string_set_static(&config->kconsumerd_cmd_unix_sock_path,
			DEFAULT_KCONSUMERD_CMD_SOCK_PATH);
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);
	}

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