C++ crm_perror函数代码示例

int
write_local_hb_uuid(const char *new_value)
{
    int fd;
    int rc = 0;
    cl_uuid_t uuid;
    char *buffer = strdup(new_value);

    rc = cl_uuid_parse(buffer, &uuid);
    if (rc != 0) {
        fprintf(stderr, "Invalid ASCII UUID supplied: [%s]\n", new_value);
        fprintf(stderr, "ASCII UUIDs must be of the form"
                " XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" " and contain only letters and digits\n");
        return 5;
    }

    if ((fd = open(UUID_FILE, O_WRONLY | O_SYNC | O_CREAT, 0644)) < 0) {
        crm_perror(LOG_ERR, "Could not open %s", UUID_FILE);
        return 6;
    }

    if (write(fd, uuid.uuid, UUID_LEN) != UUID_LEN) {
        crm_perror(LOG_ERR, "Could not write UUID to %s", UUID_FILE);
        rc = 7;
    }

    if (close(fd) < 0) {
        crm_perror(LOG_ERR, "Could not close %s", UUID_FILE);
        rc = 8;
    }
    return rc;
}

/*!
 * \internal
 * \brief Flush and sync a directory to disk
 *
 * \param[in] name Directory to flush and sync
 * \note This function logs errors but does not return them to the caller
 */
void
crm_sync_directory(const char *name)
{
    int fd;
    DIR *directory;

    directory = opendir(name);
    if (directory == NULL) {
        crm_perror(LOG_ERR, "Could not open %s for syncing", name);
        return;
    }

    fd = dirfd(directory);
    if (fd < 0) {
        crm_perror(LOG_ERR, "Could not obtain file descriptor for %s", name);
        return;
    }

    if (fsync(fd) < 0) {
        crm_perror(LOG_ERR, "Could not sync %s", name);
    }
    if (closedir(directory) < 0) {
        crm_perror(LOG_ERR, "Could not close %s after fsync", name);
    }
}

/*!
 * \brief Create a new election object
 *
 * Every node that wishes to participate in an election must create an election
 * object. Typically, this should be done once, at start-up. A caller should
 * only create a single election object.
 *
 * \param[in] name       Label for election (for logging)
 * \param[in] uname      Local node's name
 * \param[in] period_ms  How long to wait for all peers to vote
 * \param[in] cb         Function to call if local node wins election
 *
 * \return Newly allocated election object on success, NULL on error
 * \note The caller is responsible for freeing the returned value using
 *       election_fini().
 */
election_t *
election_init(const char *name, const char *uname, guint period_ms, GSourceFunc cb)
{
    election_t *e = NULL;

    static guint count = 0;

    CRM_CHECK(uname != NULL, return NULL);

    e = calloc(1, sizeof(election_t));
    if (e == NULL) {
        crm_perror(LOG_CRIT, "Cannot create election");
        return NULL;
    }

    e->uname = strdup(uname);
    if (e->uname == NULL) {
        crm_perror(LOG_CRIT, "Cannot create election");
        free(e);
        return NULL;
    }

    e->name = name? crm_strdup_printf("election-%s", name)
                  : crm_strdup_printf("election-%u", count++);
    e->cb = cb;
    e->timeout = mainloop_timer_add(e->name, period_ms, FALSE,
                                    election_timer_cb, e);
    crm_trace("Created %s", e->name);
    return e;
}

int
crm_pid_active(long pid, const char *daemon)
{
    static int have_proc_pid = 0;

    if(have_proc_pid == 0) {
        char proc_path[PATH_MAX], exe_path[PATH_MAX];

        /* check to make sure pid hasn't been reused by another process */
        snprintf(proc_path, sizeof(proc_path), "/proc/%lu/exe", (long unsigned int)getpid());

        have_proc_pid = 1;
        if(readlink(proc_path, exe_path, PATH_MAX - 1) < 0) {
            have_proc_pid = -1;
        }
    }

    if (pid <= 0) {
        return -1;

    } else if (kill(pid, 0) < 0 && errno == ESRCH) {
        return 0;

    } else if(daemon == NULL || have_proc_pid == -1) {
        return 1;

    } else {
        int rc = 0;
        char proc_path[PATH_MAX], exe_path[PATH_MAX], myexe_path[PATH_MAX];

        /* check to make sure pid hasn't been reused by another process */
        snprintf(proc_path, sizeof(proc_path), "/proc/%lu/exe", pid);

        rc = readlink(proc_path, exe_path, PATH_MAX - 1);
        if (rc < 0 && errno == EACCES) {
            crm_perror(LOG_INFO, "Could not read from %s", proc_path);
            return 1;
        } else if (rc < 0) {
            crm_perror(LOG_ERR, "Could not read from %s", proc_path);
            return 0;
        }
        

        exe_path[rc] = 0;

        if(daemon[0] != '/') {
            rc = snprintf(myexe_path, sizeof(proc_path), CRM_DAEMON_DIR"/%s", daemon);
            myexe_path[rc] = 0;
        } else {
            rc = snprintf(myexe_path, sizeof(proc_path), "%s", daemon);
            myexe_path[rc] = 0;
        }
        
        if (strcmp(exe_path, myexe_path) == 0) {
            return 1;
        }
    }

    return 0;
}

bool
crm_ipc_connect(crm_ipc_t * client)
{
    client->need_reply = FALSE;
    client->ipc = qb_ipcc_connect(client->name, client->buf_size);

    if (client->ipc == NULL) {
        crm_perror(LOG_INFO, "Could not establish %s connection", client->name);
        return FALSE;
    }

    client->pfd.fd = crm_ipc_get_fd(client);
    if (client->pfd.fd < 0) {
        crm_perror(LOG_INFO, "Could not obtain file descriptor for %s connection", client->name);
        return FALSE;
    }

    qb_ipcc_context_set(client->ipc, client);

#ifdef HAVE_IPCS_GET_BUFFER_SIZE
    client->max_buf_size = qb_ipcc_get_buffer_size(client->ipc);
    if (client->max_buf_size > client->buf_size) {
        free(client->buffer);
        client->buffer = calloc(1, client->max_buf_size);
        client->buf_size = client->max_buf_size;
    }
#endif

    return TRUE;
}

char *
get_shadow_file(const char *suffix)
{
    char *cib_home = NULL;
    char *fullname = NULL;
    char *name = crm_concat("shadow", suffix, '.');
    const char *dir = getenv("CIB_shadow_dir");

    if (dir == NULL) {
        uid_t uid = geteuid();
        struct passwd *pwent = getpwuid(uid);
        const char *user = NULL;

        if (pwent) {
            user = pwent->pw_name;
        } else {
            user = getenv("USER");
            crm_perror(LOG_ERR,
                       "Assuming %s because cannot get user details for user ID %d",
                       (user? user : "unprivileged user"), uid);
        }

        if (safe_str_eq(user, "root") || safe_str_eq(user, CRM_DAEMON_USER)) {
            dir = CRM_CONFIG_DIR;

        } else {
            const char *home = NULL;

            if ((home = getenv("HOME")) == NULL) {
                if (pwent) {
                    home = pwent->pw_dir;
                }
            }

            dir = crm_get_tmpdir();
            if (home && home[0] == '/') {
                int rc = 0;

                cib_home = crm_concat(home, ".cib", '/');

                rc = mkdir(cib_home, 0700);
                if (rc < 0 && errno != EEXIST) {
                    crm_perror(LOG_ERR, "Couldn't create user-specific shadow directory: %s",
                               cib_home);
                    errno = 0;

                } else {
                    dir = cib_home;
                }
            }
        }
    }

    fullname = crm_concat(dir, name, '/');
    free(cib_home);
    free(name);

    return fullname;
}

static int
bind_and_listen(struct addrinfo *addr)
{
    int optval;
    int fd;
    int rc;
    char buffer[256] = { 0, };

    if (addr->ai_family == AF_INET6) {
        struct sockaddr_in6 *addr_in = (struct sockaddr_in6 *)(void*)addr->ai_addr;
        inet_ntop(addr->ai_family, &addr_in->sin6_addr, buffer, DIMOF(buffer));

    } else {
        struct sockaddr_in *addr_in = (struct sockaddr_in *)(void*)addr->ai_addr;
        inet_ntop(addr->ai_family, &addr_in->sin_addr, buffer, DIMOF(buffer));
    }

    crm_trace("Attempting to bind on address %s", buffer);

    fd = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
    if (fd < 0) {
        return -1;
    }

    /* reuse address */
    optval = 1;
    rc = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
    if (rc < 0) {
        crm_perror(LOG_INFO, "Couldn't allow the reuse of local addresses by our remote listener, bind address %s", buffer);
        close(fd);
        return -1;
    }

    if (addr->ai_family == AF_INET6) {
        optval = 0;
        rc = setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &optval, sizeof(optval));
        if (rc < 0) {
            crm_perror(LOG_INFO, "Couldn't disable IPV6 only on address %s", buffer);
            close(fd);
            return -1;
        }
    }

    if (bind(fd, addr->ai_addr, addr->ai_addrlen) != 0) {
        close(fd);
        return -1;
    }

    if (listen(fd, 10) == -1) {
        crm_err("Can not start listen on address %s", buffer);
        close(fd);
        return -1;
    }

    crm_notice("Listening on address %s", buffer);

    return fd;
}

gboolean
crm_log_init(
    const char *entity, int level, gboolean coredir, gboolean to_stderr,
    int argc, char **argv)
{
	/* Redirect messages from glib functions to our handler */
/*  	cl_malloc_forced_for_glib(); */
#ifdef HAVE_G_LOG_SET_DEFAULT_HANDLER
	glib_log_default = g_log_set_default_handler(crm_glib_handler, NULL);
#endif
	
	/* and for good measure... - this enum is a bit field (!) */
	g_log_set_always_fatal((GLogLevelFlags)0); /*value out of range*/
	
	crm_system_name = entity;
	setenv("PCMK_service", crm_system_name, 1);
	cl_log_set_entity(entity);
	if(argc == 0) {
	    /* Nuke any syslog activity */
	    unsetenv("HA_logfacility");

	} else if(getenv("HA_logfacility") == NULL) {
	    /* Set a default */
	    cl_log_set_facility(HA_LOG_FACILITY);
	} /* else: picked up by crm_set_env_options() */
	
	if(coredir) {
	    int user = getuid();
	    struct passwd *pwent = NULL;
	    const char *base = HA_COREDIR;
	    
	    pwent = getpwuid(user);

	    if (chdir(base) < 0) {
		crm_perror(LOG_ERR, "Cannot change active directory to %s", base);

	    } else if (pwent == NULL) {
		crm_perror(LOG_ERR, "Cannot get name for uid: %d", user);

	    } else if (chdir(pwent->pw_name) < 0) {
		crm_perror(LOG_ERR, "Cannot change active directory to %s/%s", base, pwent->pw_name);

	    } else {
		crm_info("Changed active directory to %s/%s", base, pwent->pw_name);
	    }
	}
	
	set_crm_log_level(level);
	crm_set_env_options();

	cl_log_args(argc, argv);
	cl_log_enable_stderr(to_stderr);

	crm_signal(DEBUG_INC, alter_debug);
	crm_signal(DEBUG_DEC, alter_debug);

	return TRUE;
}

static int
bind_and_listen(struct addrinfo *addr)
{
    int optval;
    int fd;
    int rc;
    char buffer[INET6_ADDRSTRLEN] = { 0, };

    crm_sockaddr2str(addr->ai_addr, buffer);
    crm_trace("Attempting to bind to address %s", buffer);

    fd = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
    if (fd < 0) {
        crm_perror(LOG_ERR, "Listener socket creation failed");
        return -1;
    }

    /* reuse address */
    optval = 1;
    rc = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
    if (rc < 0) {
        crm_perror(LOG_ERR, "Local address reuse not allowed on %s", buffer);
        close(fd);
        return -1;
    }

    if (addr->ai_family == AF_INET6) {
        optval = 0;
        rc = setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &optval, sizeof(optval));
        if (rc < 0) {
            crm_perror(LOG_INFO, "Couldn't disable IPV6-only on %s", buffer);
            close(fd);
            return -1;
        }
    }

    if (bind(fd, addr->ai_addr, addr->ai_addrlen) != 0) {
        crm_perror(LOG_ERR, "Cannot bind to %s", buffer);
        close(fd);
        return -1;
    }

    if (listen(fd, 10) == -1) {
        crm_perror(LOG_ERR, "Cannot listen on %s", buffer);
        close(fd);
        return -1;
    }
    return fd;
}

static gboolean
stop_child(pcmk_child_t * child, int signal)
{
    if (signal == 0) {
        signal = SIGTERM;
    }

    if (child->command == NULL) {
        crm_debug("Nothing to do for child \"%s\"", child->name);
        return TRUE;
    }

    if (child->pid <= 0) {
        crm_trace("Client %s not running", child->name);
        return TRUE;
    }

    errno = 0;
    if (kill(child->pid, signal) == 0) {
        crm_notice("Stopping %s: Sent -%d to process %d", child->name, signal, child->pid);

    } else {
        crm_perror(LOG_ERR, "Stopping %s: Could not send -%d to process %d failed",
                   child->name, signal, child->pid);
    }

    return TRUE;
}

static gboolean try_heartbeat(int command)
{
    crm_debug("Attempting to process %c command", command);
    
    if(command == 'i') {
	if(read_local_hb_uuid()) {
	    exit(0);
	}
	
    } else if(ccm_age_connect(&ccm_fd)) {
	int rc = 0;
	fd_set rset;	
	while (1) {
	    
	    sleep(1);
	    FD_ZERO(&rset);
	    FD_SET(ccm_fd, &rset);
	    
	    errno = 0;
	    rc = select(ccm_fd + 1, &rset, NULL,NULL,NULL);
	    
	    if(rc > 0 && oc_ev_handle_event(ccm_token) != 0) {
		crm_err("oc_ev_handle_event failed");
		exit(1);
		
	    } else if(rc < 0 && errno != EINTR) {
		crm_perror(LOG_ERR, "select failed");
		exit(1);
	    }
	    
	}
    }
    return FALSE;
}

mainloop_io_t *
mainloop_add_ipc_client(const char *name, int priority, size_t max_size, void *userdata,
                        struct ipc_client_callbacks *callbacks)
{
    mainloop_io_t *client = NULL;
    crm_ipc_t *conn = crm_ipc_new(name, max_size);

    if (conn && crm_ipc_connect(conn)) {
        int32_t fd = crm_ipc_get_fd(conn);

        client = mainloop_add_fd(name, priority, fd, userdata, NULL);
    }

    if (client == NULL) {
        crm_perror(LOG_TRACE, "Connection to %s failed", name);
        if (conn) {
            crm_ipc_close(conn);
            crm_ipc_destroy(conn);
        }
        return NULL;
    }

    client->ipc = conn;
    client->destroy_fn = callbacks->destroy;
    client->dispatch_fn_ipc = callbacks->dispatch;
    return client;
}

/*!
 * \internal
 * \brief Handle cluster communication related to pacemaker_remote node leaving
 *
 * \param[in] node_name  Name of lost node
 */
static void
remote_node_down(const char *node_name)
{
    xmlNode *update;
    int call_id = 0;
    int call_opt = crmd_cib_smart_opt();
    crm_node_t *node;

    /* Purge node from attrd's memory */
    update_attrd_remote_node_removed(node_name, NULL);

    /* Purge node's operation history and transient attributes from CIB */
    erase_status_tag(node_name, XML_CIB_TAG_LRM, call_opt);
    erase_status_tag(node_name, XML_TAG_TRANSIENT_NODEATTRS, call_opt);

    /* Ensure node is in the remote peer cache with lost state */
    node = crm_remote_peer_get(node_name);
    CRM_CHECK(node != NULL, return);
    crm_update_peer_state(__FUNCTION__, node, CRM_NODE_LOST, 0);

    /* Notify DC */
    send_remote_state_message(node_name, FALSE);

    /* Update CIB node state */
    update = create_xml_node(NULL, XML_CIB_TAG_STATUS);
    do_update_node_cib(node, node_update_cluster, update, __FUNCTION__);
    fsa_cib_update(XML_CIB_TAG_STATUS, update, call_opt, call_id, NULL);
    if (call_id < 0) {
        crm_perror(LOG_ERR, "%s CIB node state update", node_name);
    }
    free_xml(update);
}

static int
crm_lock_pidfile(const char *filename, const char *name)
{
    long mypid = 0;
    int fd = 0, rc = 0;
    char buf[LOCKSTRLEN + 1];

    mypid = (unsigned long)getpid();

    rc = crm_pidfile_inuse(filename, 0, name);
    if (rc == -ENOENT) {
        /* exists but the process is not active */

    } else if (rc != pcmk_ok) {
        /* locked by existing process - give up */
        return rc;
    }

    if ((fd = open(filename, O_CREAT | O_WRONLY | O_EXCL, 0644)) < 0) {
        /* Hmmh, why did we fail? Anyway, nothing we can do about it */
        return -errno;
    }

    snprintf(buf, sizeof(buf), "%*lu\n", LOCKSTRLEN - 1, mypid);
    rc = write(fd, buf, LOCKSTRLEN);
    close(fd);

    if (rc != LOCKSTRLEN) {
        crm_perror(LOG_ERR, "Incomplete write to %s", filename);
        return -errno;
    }

    return crm_pidfile_inuse(filename, mypid, name);
}

/*!
 * \internal
 * \brief Handle cluster communication related to pacemaker_remote node leaving
 *
 * \param[in] node_name  Name of lost node
 */
static void
remote_node_down(const char *node_name)
{
    xmlNode *update;
    int call_id = 0;
    int call_opt = crmd_cib_smart_opt();
    crm_node_t *node;

    /* Clear all node attributes */
    update_attrd_remote_node_removed(node_name, NULL);

    /* Ensure node is in the remote peer cache with lost state */
    node = crm_remote_peer_get(node_name);
    CRM_CHECK(node != NULL, return);
    crm_update_peer_state(__FUNCTION__, node, CRM_NODE_LOST, 0);

    /* Notify DC */
    send_remote_state_message(node_name, FALSE);

    /* Update CIB node state */
    update = create_xml_node(NULL, XML_CIB_TAG_STATUS);
    do_update_node_cib(node, node_update_cluster, update, __FUNCTION__);
    fsa_cib_update(XML_CIB_TAG_STATUS, update, call_opt, call_id, NULL);
    if (call_id < 0) {
        crm_perror(LOG_ERR, "%s CIB node state update", node_name);
    }
    free_xml(update);
}