X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=ltt-sessiond%2Fltt-sessiond.c;fp=ltt-sessiond%2Fltt-sessiond.c;h=0000000000000000000000000000000000000000;hb=5b74c7b1ca96399ba5c8bd0ce6974aea671198eb;hp=4f9ca1bd4d2e45396edbbe367a165dca50af3830;hpb=60cdef54fab0dea23a80ab199064128ab559af84;p=lttng-tools.git diff --git a/ltt-sessiond/ltt-sessiond.c b/ltt-sessiond/ltt-sessiond.c deleted file mode 100644 index 4f9ca1bd4..000000000 --- a/ltt-sessiond/ltt-sessiond.c +++ /dev/null @@ -1,1210 +0,0 @@ -/* - * Copyright (C) 2011 - David Goulet - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#define _GNU_SOURCE -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include /* URCU list library (-lurcu) */ -#include /* UST control lib (-lust) */ -#include - -#include "liblttsessiondcomm.h" -#include "ltt-sessiond.h" -#include "lttngerr.h" - -/* Const values */ -const char default_home_dir[] = DEFAULT_HOME_DIR; -const char default_tracing_group[] = DEFAULT_TRACING_GROUP; -const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; -const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; - -/* Static functions */ -static int set_signal_handler(void); -static int set_socket_perms(void); -static void sighandler(int sig); -static void cleanup(void); -static void copy_common_data(struct lttcomm_lttng_msg *llm, struct lttcomm_session_msg *lsm); -static int check_existing_daemon(void); -static int notify_apps(const char* name); -static int connect_app(pid_t pid); -static int find_app_by_pid(pid_t pid); -static int init_daemon_socket(void); -static int process_client_msg(int sock, struct lttcomm_session_msg*); -static int send_unix_sock(int sock, void *buf, size_t len); -static int setup_data_buffer(char **buf, size_t size, struct lttcomm_lttng_msg *llm); -static void add_traceable_app(struct ltt_traceable_app *lta); -static void del_traceable_app(struct ltt_traceable_app *lta); -static void add_session_list(struct ltt_session *ls); -static void del_session_list(struct ltt_session *ls); - -/* Command function */ -static void get_list_apps(pid_t *pids); -static void get_list_sessions(struct lttng_session *lt); - -static void *thread_manage_clients(void *data); -static void *thread_manage_apps(void *data); - -static int create_session(char *name, uuid_t *session_id); -static int destroy_session(uuid_t *uuid); - -static struct ltt_session *find_session_by_uuid(uuid_t session_id); -static struct ltt_session *find_session_by_name(char *name); - -/* Variables */ -const char *progname; -const char *opt_tracing_group; -static int opt_sig_parent; -static int opt_daemon; -int opt_verbose; -int opt_quiet; -static int is_root; /* Set to 1 if the daemon is running as root */ -static pid_t ppid; - -static char apps_unix_sock_path[PATH_MAX]; /* Global application Unix socket path */ -static char client_unix_sock_path[PATH_MAX]; /* Global client Unix socket path */ - -static int client_socket; -static int apps_socket; - -static struct ltt_session *current_session; - -/* Number of element for the list below. */ -static unsigned int session_count; -static unsigned int traceable_app_count; - -/* Init session's list */ -static struct ltt_session_list ltt_session_list = { - .head = CDS_LIST_HEAD_INIT(ltt_session_list.head), -}; - -/* Init ust traceabl application's list */ -static struct ltt_traceable_app_list ltt_traceable_app_list = { - .head = CDS_LIST_HEAD_INIT(ltt_traceable_app_list.head), -}; - -/* List mutex */ -pthread_mutex_t ltt_traceable_app_list_mutex; - -/* - * thread_manage_apps - * - * This thread manage the application socket communication - */ -static void *thread_manage_apps(void *data) -{ - int sock, ret; - struct ltt_traceable_app *lta; - - /* TODO: Something more elegant is needed but fine for now */ - struct { - int reg; /* 1:register, 0:unregister */ - pid_t pid; - uid_t uid; - } reg_msg; - - /* Notify all applications to register */ - notify_apps(default_global_apps_pipe); - - ret = lttcomm_listen_unix_sock(apps_socket); - if (ret < 0) { - goto error; - } - - while (1) { - /* Blocking call, waiting for transmission */ - sock = lttcomm_accept_unix_sock(apps_socket); - if (sock < 0) { - goto error; - } - - /* Basic recv here to handle the very simple data - * that the libust send to register (reg_msg). - */ - ret = recv(sock, ®_msg, sizeof(reg_msg), 0); - if (ret < 0) { - perror("recv"); - continue; - } - - /* Add application to the global traceable list */ - if (reg_msg.reg == 1) { - /* Registering */ - lta = malloc(sizeof(struct ltt_traceable_app)); - lta->pid = reg_msg.pid; - lta->uid = reg_msg.uid; - add_traceable_app(lta); - } else { - /* Unregistering */ - cds_list_for_each_entry(lta, <t_traceable_app_list.head, list) { - if (lta->pid == reg_msg.pid && lta->uid == reg_msg.uid) { - del_traceable_app(lta); - free(lta); - break; - } - } - } - } - -error: - - return NULL; -} - -/* - * thread_manage_clients - * - * This thread manage all clients request using the unix - * client socket for communication. - */ -static void *thread_manage_clients(void *data) -{ - int sock, ret; - struct lttcomm_session_msg lsm; - - ret = lttcomm_listen_unix_sock(client_socket); - if (ret < 0) { - goto error; - } - - /* Notify parent pid that we are ready - * to accept command for client side. - */ - if (opt_sig_parent) { - kill(ppid, SIGCHLD); - } - - while (1) { - /* Blocking call, waiting for transmission */ - sock = lttcomm_accept_unix_sock(client_socket); - if (sock < 0) { - goto error; - } - - /* - * Data is received from the lttng client. The struct - * lttcomm_session_msg (lsm) contains the command and data - * request of the client. - */ - ret = lttcomm_recv_unix_sock(sock, &lsm, sizeof(lsm)); - if (ret <= 0) { - continue; - } - - /* This function dispatch the work to the LTTng or UST libs - * and then sends back the response to the client. This is needed - * because there might be more then one lttcomm_lttng_msg to - * send out so process_client_msg do both jobs. - */ - ret = process_client_msg(sock, &lsm); - if (ret < 0) { - /* Error detected but still accept command */ - continue; - } - } - -error: - return NULL; -} - -/* - * add_traceable_app - * - * Add a traceable application structure to the global - * list protected by a mutex. - */ -static void add_traceable_app(struct ltt_traceable_app *lta) -{ - pthread_mutex_lock(<t_traceable_app_list_mutex); - cds_list_add(<a->list, <t_traceable_app_list.head); - traceable_app_count++; - pthread_mutex_unlock(<t_traceable_app_list_mutex); -} - -/* - * del_traceable_app - * - * Delete a traceable application structure from the - * global list protected by a mutex. - */ -static void del_traceable_app(struct ltt_traceable_app *lta) -{ - pthread_mutex_lock(<t_traceable_app_list_mutex); - cds_list_del(<a->list); - /* Sanity check */ - if (traceable_app_count != 0) { - traceable_app_count--; - } - pthread_mutex_unlock(<t_traceable_app_list_mutex); -} - -/* - * add_session_list - * - * Add a ltt_session structure to the global list. - */ -static void add_session_list(struct ltt_session *ls) -{ - cds_list_add(&ls->list, <t_session_list.head); - session_count++; -} - -/* - * del_session_list - * - * Delete a ltt_session structure to the global list. - */ -static void del_session_list(struct ltt_session *ls) -{ - cds_list_del(&ls->list); - /* Sanity check */ - if (session_count != 0) { - session_count--; - } -} - -/* - * send_unix_sock - * - * Send data on a unix socket using the liblttsessiondcomm API. - * - * Return lttcomm error code. - */ -static int send_unix_sock(int sock, void *buf, size_t len) -{ - /* Check valid length */ - if (len <= 0) { - return -1; - } - - return lttcomm_send_unix_sock(sock, buf, len); -} - -/* - * connect_app - * - * Return a socket connected to the libust communication socket - * of the application identified by the pid. - * - * If the pid is not found in the traceable list, - * return -1 to indicate error. - */ -static int connect_app(pid_t pid) -{ - int sock, ret; - - ret = find_app_by_pid(pid); - if (ret == 0) { - return -1; - } - - sock = ustctl_connect_pid(pid); - if (sock < 0) { - ERR("Fail connecting to the PID %d\n", pid); - } - - return sock; -} - -/* - * notify_apps - * - * Notify apps by writing 42 to a named pipe using name. - * Every applications waiting for a ltt-sessiond will be notified - * and re-register automatically to the session daemon. - * - * Return open or write error value. - */ -static int notify_apps(const char *name) -{ - int fd; - int ret = -1; - - /* Try opening the global pipe */ - fd = open(name, O_WRONLY); - if (fd < 0) { - goto error; - } - - /* Notify by writing on the pipe */ - ret = write(fd, "42", 2); - if (ret < 0) { - perror("write"); - } - -error: - return ret; -} - -/* - * find_app_by_pid - * - * Iterate over the traceable apps list. - * On success, return 1, else return 0 - */ -static int find_app_by_pid(pid_t pid) -{ - struct ltt_traceable_app *iter; - - pthread_mutex_lock(<t_traceable_app_list_mutex); - cds_list_for_each_entry(iter, <t_traceable_app_list.head, list) { - if (iter->pid == pid) { - pthread_mutex_unlock(<t_traceable_app_list_mutex); - /* Found */ - return 1; - } - } - pthread_mutex_unlock(<t_traceable_app_list_mutex); - - return 0; -} - -/* - * find_session_by_uuid - * - * Return a ltt_session structure ptr that matches the uuid. - */ -static struct ltt_session *find_session_by_uuid(uuid_t session_id) -{ - int found = 0; - struct ltt_session *iter; - - /* Sanity check for NULL session_id */ - if (uuid_is_null(session_id)) { - goto end; - } - - cds_list_for_each_entry(iter, <t_session_list.head, list) { - if (uuid_compare(iter->uuid, session_id) == 0) { - found = 1; - break; - } - } - -end: - if (!found) { - iter = NULL; - } - return iter; -} - -/* - * find_session_by_name - * - * Return a ltt_session structure ptr that matches name. - * If no session found, NULL is returned. - */ -static struct ltt_session *find_session_by_name(char *name) -{ - int found = 0; - struct ltt_session *iter; - - cds_list_for_each_entry(iter, <t_session_list.head, list) { - if (strncmp(iter->name, name, strlen(iter->name)) == 0) { - found = 1; - break; - } - } - - if (!found) { - iter = NULL; - } - - return iter; -} - -/* - * destroy_session - * - * Delete session from the global session list - * and free the memory. - * - * Return -1 if no session is found. - * On success, return 1; - */ -static int destroy_session(uuid_t *uuid) -{ - int found = -1; - struct ltt_session *iter; - - cds_list_for_each_entry(iter, <t_session_list.head, list) { - if (uuid_compare(iter->uuid, *uuid) == 0) { - del_session_list(iter); - free(iter); - found = 1; - break; - } - } - - return found; -} - -/* - * create_session - * - * Create a brand new session and add it to the - * global session list. - */ -static int create_session(char *name, uuid_t *session_id) -{ - struct ltt_session *new_session; - - new_session = find_session_by_name(name); - if (new_session != NULL) { - goto error; - } - - /* Allocate session data structure */ - new_session = malloc(sizeof(struct ltt_session)); - if (new_session == NULL) { - perror("malloc"); - goto error_mem; - } - - if (name != NULL) { - if (asprintf(&new_session->name, "%s", name) < 0) { - goto error_mem; - } - } else { - /* Generate session name based on the session count */ - if (asprintf(&new_session->name, "%s%d", "lttng-", session_count) < 0) { - goto error_mem; - } - } - - /* UUID generation */ - uuid_generate(new_session->uuid); - uuid_copy(*session_id, new_session->uuid); - - /* Set consumer (identifier) to 0. This means that there is - * NO consumer attach to that session yet. - */ - new_session->ust_consumer = 0; - new_session->lttng_consumer = 0; - - /* Init list */ - CDS_INIT_LIST_HEAD(&new_session->ust_traces); - CDS_INIT_LIST_HEAD(&new_session->lttng_traces); - - /* Add new session to the global session list */ - add_session_list(new_session); - - return 0; - -error: - return -1; - -error_mem: - return -ENOMEM; -} - -/* - * ust_create_trace - * - * Create an userspace trace using pid. - * This trace is then appended to the current session - * ust trace list. - */ -static int ust_create_trace(pid_t pid) -{ - int sock, ret; - struct ltt_ust_trace *trace; - - trace = malloc(sizeof(struct ltt_ust_trace)); - if (trace == NULL) { - perror("malloc"); - ret = -1; - goto error; - } - - /* Init */ - trace->pid = pid; - trace->shmid = 0; - - /* Connect to app using ustctl API */ - sock = connect_app(pid); - if (sock < 0) { - ret = LTTCOMM_NO_TRACEABLE; - goto error; - } - - ret = ustctl_create_trace(sock, "auto"); - if (ret < 0) { - ret = LTTCOMM_CREATE_FAIL; - goto error; - } - - /* Check if current session is valid */ - if (current_session) { - cds_list_add(&trace->list, ¤t_session->ust_traces); - } - -error: - return ret; -} - -/* - * get_list_apps - * - * List traceable user-space application and fill an - * array of pids. - */ -static void get_list_apps(pid_t *pids) -{ - int i = 0; - struct ltt_traceable_app *iter; - - /* Protected by a mutex here because the threads manage_client - * and manage_apps can access this list. - */ - pthread_mutex_lock(<t_traceable_app_list_mutex); - cds_list_for_each_entry(iter, <t_traceable_app_list.head, list) { - pids[i] = iter->pid; - i++; - } - pthread_mutex_unlock(<t_traceable_app_list_mutex); -} - -/* - * get_list_sessions - * - * List sessions and fill the data buffer. - */ -static void get_list_sessions(struct lttng_session *lt) -{ - int i = 0; - struct ltt_session *iter; - struct lttng_session lsess; - - /* Iterate over session list and append data after - * the control struct in the buffer. - */ - cds_list_for_each_entry(iter, <t_session_list.head, list) { - /* Copy name and uuid */ - uuid_unparse(iter->uuid, lsess.uuid); - strncpy(lsess.name, iter->name, sizeof(lsess.name)); - lsess.name[sizeof(lsess.name) - 1] = '\0'; - memcpy(<[i], &lsess, sizeof(lsess)); - i++; - /* Reset struct for next pass */ - memset(&lsess, 0, sizeof(lsess)); - } -} - -/* - * copy_common_data - * - * Copy common data between lttcomm_lttng_msg and lttcomm_session_msg - */ -static void copy_common_data(struct lttcomm_lttng_msg *llm, struct lttcomm_session_msg *lsm) -{ - llm->cmd_type = lsm->cmd_type; - llm->pid = lsm->pid; - - /* Manage uuid */ - if (!uuid_is_null(lsm->session_id)) { - uuid_copy(llm->session_id, lsm->session_id); - } - - strncpy(llm->trace_name, lsm->trace_name, strlen(llm->trace_name)); - llm->trace_name[strlen(llm->trace_name) - 1] = '\0'; -} - -/* - * setup_data_buffer - * - * Setup the outgoing data buffer for the response - * data allocating the right amount of memory. - * - * Return total size of the buffer pointed by buf. - */ -static int setup_data_buffer(char **buf, size_t s_data, struct lttcomm_lttng_msg *llm) -{ - int ret = 0; - size_t buf_size; - - buf_size = sizeof(struct lttcomm_lttng_msg) + s_data; - *buf = malloc(buf_size); - if (*buf == NULL) { - perror("malloc"); - ret = -1; - goto error; - } - - /* Setup lttcomm_lttng_msg data and copy - * it to the newly allocated buffer. - */ - llm->size_payload = s_data; - memcpy(*buf, llm, sizeof(struct lttcomm_lttng_msg)); - - return buf_size; - -error: - return ret; -} - -/* - * process_client_msg - * - * This takes the lttcomm_session_msg struct and process the command requested - * by the client. It then creates response(s) and send it back to the - * given socket (sock). - * - * Return any error encountered or 0 for success. - */ -static int process_client_msg(int sock, struct lttcomm_session_msg *lsm) -{ - int ret; - int buf_size; - size_t header_size; - char *send_buf = NULL; - struct lttcomm_lttng_msg llm; - - /* Copy common data to identify the response - * on the lttng client side. - */ - copy_common_data(&llm, lsm); - - /* Check command that needs a session */ - if (lsm->cmd_type != LTTNG_CREATE_SESSION && - lsm->cmd_type != LTTNG_LIST_SESSIONS && - lsm->cmd_type != UST_LIST_APPS) - { - current_session = find_session_by_uuid(lsm->session_id); - if (current_session == NULL) { - ret = LTTCOMM_SELECT_SESS; - goto end; - } - } - - /* Default return code. - * In our world, everything is OK... right? ;) - */ - llm.ret_code = LTTCOMM_OK; - - header_size = sizeof(struct lttcomm_lttng_msg); - - /* Process by command type */ - switch (lsm->cmd_type) { - case LTTNG_CREATE_SESSION: - { - ret = create_session(lsm->session_name, &llm.session_id); - if (ret < 0) { - if (ret == -1) { - ret = LTTCOMM_EXIST_SESS; - } else { - ret = LTTCOMM_FATAL; - } - goto end; - } - - buf_size = setup_data_buffer(&send_buf, 0, &llm); - if (buf_size < 0) { - ret = LTTCOMM_FATAL; - goto end; - } - - break; - } - case LTTNG_DESTROY_SESSION: - { - ret = destroy_session(&lsm->session_id); - if (ret < 0) { - ret = LTTCOMM_NO_SESS; - } else { - ret = LTTCOMM_OK; - } - - /* No auxiliary data so only send the llm struct. */ - goto end; - } - case UST_CREATE_TRACE: - { - ret = ust_create_trace(lsm->pid); - if (ret < 0) { - ret = LTTCOMM_CREATE_FAIL; - goto end; - } - - /* No auxiliary data so only send the llm struct. */ - goto end; - } - case UST_LIST_APPS: - { - /* Stop right now if no apps */ - if (traceable_app_count == 0) { - ret = LTTCOMM_NO_APPS; - goto end; - } - - /* Setup data buffer and details for transmission */ - buf_size = setup_data_buffer(&send_buf, - sizeof(pid_t) * traceable_app_count, &llm); - if (buf_size < 0) { - ret = LTTCOMM_FATAL; - goto end; - } - - get_list_apps((pid_t *)(send_buf + header_size)); - - break; - } - case LTTNG_LIST_SESSIONS: - { - /* Stop right now if no session */ - if (session_count == 0) { - ret = LTTCOMM_NO_SESS; - goto end; - } - - /* Setup data buffer and details for transmission */ - buf_size = setup_data_buffer(&send_buf, - (sizeof(struct lttng_session) * session_count), &llm); - if (buf_size < 0) { - ret = LTTCOMM_FATAL; - goto end; - } - - get_list_sessions((struct lttng_session *)(send_buf + header_size)); - - break; - } - default: - { - /* Undefined command */ - ret = LTTCOMM_UND; - goto end; - } - } - - ret = send_unix_sock(sock, send_buf, buf_size); - - if (send_buf != NULL) { - free(send_buf); - } - - return ret; - -end: - /* Notify client of error */ - llm.ret_code = ret; - llm.size_payload = 0; - send_unix_sock(sock, (void*) &llm, sizeof(llm)); - - return ret; -} - -/* - * usage function on stderr - */ -static void usage(void) -{ - fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); - fprintf(stderr, " -h, --help Display this usage.\n"); - fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); - fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket.\n"); - fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); - fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); - fprintf(stderr, " -V, --version Show version number.\n"); - fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); - fprintf(stderr, " -q, --quiet No output at all.\n"); -} - -/* - * daemon argument parsing - */ -static int parse_args(int argc, char **argv) -{ - int c; - - static struct option long_options[] = { - { "client-sock", 1, 0, 'c' }, - { "apps-sock", 1, 0, 'a' }, - { "daemonize", 0, 0, 'd' }, - { "sig-parent", 0, 0, 'S' }, - { "help", 0, 0, 'h' }, - { "group", 1, 0, 'g' }, - { "version", 0, 0, 'V' }, - { "quiet", 0, 0, 'q' }, - { NULL, 0, 0, 0 } - }; - - while (1) { - int option_index = 0; - c = getopt_long(argc, argv, "dhqVS" "a:c:g:s:", long_options, &option_index); - if (c == -1) { - break; - } - - switch (c) { - case 0: - fprintf(stderr, "option %s", long_options[option_index].name); - if (optarg) { - fprintf(stderr, " with arg %s\n", optarg); - } - break; - case 'c': - snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); - break; - case 'a': - snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); - break; - case 'd': - opt_daemon = 1; - break; - case 'g': - opt_tracing_group = strdup(optarg); - break; - case 'h': - usage(); - exit(EXIT_FAILURE); - case 'V': - fprintf(stdout, "%s\n", VERSION); - exit(EXIT_SUCCESS); - case 'S': - opt_sig_parent = 1; - break; - case 'q': - opt_quiet = 1; - break; - default: - /* Unknown option or other error. - * Error is printed by getopt, just return */ - return -1; - } - } - - return 0; -} - -/* - * init_daemon_socket - * - * Creates the two needed socket by the daemon. - * apps_socket - The communication socket for all UST apps. - * client_socket - The communication of the cli tool (lttng). - */ -static int init_daemon_socket() -{ - int ret = 0; - mode_t old_umask; - - old_umask = umask(0); - - /* Create client tool unix socket */ - client_socket = lttcomm_create_unix_sock(client_unix_sock_path); - if (client_socket < 0) { - ret = -1; - goto end; - } - - /* File permission MUST be 660 */ - ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); - if (ret < 0) { - perror("chmod"); - goto end; - } - - /* Create the application unix socket */ - apps_socket = lttcomm_create_unix_sock(apps_unix_sock_path); - if (apps_socket < 0) { - ret = -1; - goto end; - } - - /* File permission MUST be 660 */ - ret = chmod(apps_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); - if (ret < 0) { - perror("chmod"); - goto end; - } - -end: - umask(old_umask); - return ret; -} - -/* - * check_existing_daemon - * - * Check if the global socket is available. - * If yes, error is returned. - */ -static int check_existing_daemon() -{ - int ret; - - ret = access(client_unix_sock_path, F_OK); - if (ret == 0) { - ret = access(apps_unix_sock_path, F_OK); - } - - return ret; -} - -/* - * get_home_dir - * - * Return pointer to home directory path using - * the env variable HOME. - * - * Default : /tmp - */ -static const char *get_home_dir(void) -{ - const char *home_path; - - if ((home_path = (const char *) getenv("HOME")) == NULL) { - home_path = default_home_dir; - } - - return home_path; -} - -/* - * set_socket_perms - * - * Set the tracing group gid onto the client socket. - */ -static int set_socket_perms(void) -{ - int ret; - struct group *grp; - - /* Decide which group name to use */ - (opt_tracing_group != NULL) ? - (grp = getgrnam(opt_tracing_group)) : - (grp = getgrnam(default_tracing_group)); - - if (grp == NULL) { - ERR("Missing tracing group. Aborting execution.\n"); - ret = -1; - goto end; - } - - ret = chown(client_unix_sock_path, 0, grp->gr_gid); - if (ret < 0) { - perror("chown"); - } - -end: - return ret; -} - -/* - * set_signal_handler - * - * Setup signal handler for : - * SIGINT, SIGTERM, SIGPIPE - */ -static int set_signal_handler(void) -{ - int ret = 0; - struct sigaction sa; - sigset_t sigset; - - if ((ret = sigemptyset(&sigset)) < 0) { - perror("sigemptyset"); - return ret; - } - - sa.sa_handler = sighandler; - sa.sa_mask = sigset; - sa.sa_flags = 0; - if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { - perror("sigaction"); - return ret; - } - - if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { - perror("sigaction"); - return ret; - } - - if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { - perror("sigaction"); - return ret; - } - - return ret; -} - -/** - * sighandler - * - * Signal handler for the daemon - */ -static void sighandler(int sig) -{ - switch (sig) { - case SIGPIPE: - return; - case SIGINT: - case SIGTERM: - cleanup(); - break; - default: - break; - } - - exit(EXIT_SUCCESS); -} - -/* - * cleanup - * - * Cleanup the daemon on exit - */ -static void cleanup() -{ - /* */ - MSG("\n%c[%d;%dm*** assert failed *** ==> %c[%dm", 27,1,31,27,0); - MSG("%c[%d;%dmMatthew, BEET driven development works!%c[%dm",27,1,33,27,0); - /* */ - - unlink(client_unix_sock_path); - unlink(apps_unix_sock_path); -} - -/* - * main - */ -int main(int argc, char **argv) -{ - int i; - int ret = 0; - void *status; - pthread_t threads[2]; - - /* Parse arguments */ - progname = argv[0]; - if ((ret = parse_args(argc, argv) < 0)) { - goto error; - } - - /* Daemonize */ - if (opt_daemon) { - ret = daemon(0, 0); - if (ret < 0) { - perror("daemon"); - goto error; - } - } - - /* Check if daemon is UID = 0 */ - is_root = !getuid(); - - /* Set all sockets path */ - if (is_root) { - if (strlen(apps_unix_sock_path) == 0) { - (snprintf(apps_unix_sock_path, PATH_MAX, - DEFAULT_GLOBAL_APPS_UNIX_SOCK)); - } - - if (strlen(client_unix_sock_path) == 0) { - (snprintf(client_unix_sock_path, PATH_MAX, - DEFAULT_GLOBAL_CLIENT_UNIX_SOCK)); - } - } else { - if (strlen(apps_unix_sock_path) == 0) { - (snprintf(apps_unix_sock_path, PATH_MAX, - DEFAULT_HOME_APPS_UNIX_SOCK, get_home_dir())); - } - - /* Set the cli tool unix socket path */ - if (strlen(client_unix_sock_path) == 0) { - (snprintf(client_unix_sock_path, PATH_MAX, - DEFAULT_HOME_CLIENT_UNIX_SOCK, get_home_dir())); - } - } - - /* See if daemon already exist. If any of the two - * socket needed by the daemon are present, this test fails - */ - if ((ret = check_existing_daemon()) == 0) { - ERR("Already running daemon.\n"); - /* We do not goto error because we must not - * cleanup() because a daemon is already working. - */ - return EXIT_FAILURE; - } - - if (set_signal_handler() < 0) { - goto error; - } - - /* Setup the two needed unix socket */ - if (init_daemon_socket() < 0) { - goto error; - } - - /* Set credentials to socket */ - if (is_root && (set_socket_perms() < 0)) { - goto error; - } - - /* Get parent pid if -S, --sig-parent is specified. */ - if (opt_sig_parent) { - ppid = getppid(); - } - - while (1) { - /* Create thread to manage the client socket */ - ret = pthread_create(&threads[0], NULL, thread_manage_clients, (void *) NULL); - if (ret != 0) { - perror("pthread_create"); - goto error; - } - - /* Create thread to manage application socket */ - ret = pthread_create(&threads[1], NULL, thread_manage_apps, (void *) NULL); - if (ret != 0) { - perror("pthread_create"); - goto error; - } - - for (i = 0; i < 2; i++) { - ret = pthread_join(threads[i], &status); - if (ret != 0) { - perror("pthread_join"); - goto error; - } - } - } - - cleanup(); - return 0; - -error: - cleanup(); - - return EXIT_FAILURE; -}