-/*
- * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * 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 <fcntl.h>
-#include <getopt.h>
-#include <grp.h>
-#include <limits.h>
-#include <pthread.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ipc.h>
-#include <sys/shm.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <urcu/list.h>
-#include <poll.h>
-#include <unistd.h>
-#include <sys/mman.h>
-
-#include "lttngerr.h"
-#include "libkernelctl.h"
-#include "liblttsessiondcomm.h"
-#include "liblttkconsumerd.h"
-
-/* the two threads (receive fd and poll) */
-pthread_t threads[2];
-
-/* to count the number of time the user pressed ctrl+c */
-static int sigintcount = 0;
-
-/* Argument variables */
-int opt_quiet;
-int opt_verbose;
-static int opt_daemon;
-static const char *progname;
-char command_sock_path[PATH_MAX]; /* Global command socket path */
-char error_sock_path[PATH_MAX]; /* Global error path */
-
-/*
- * sighandler
- *
- * Signal handler for the daemon
- */
-static void sighandler(int sig)
-{
- if (sig == SIGINT && sigintcount++ == 0) {
- DBG("ignoring first SIGINT");
- return;
- }
-
- kconsumerd_cleanup();
-}
-
-/*
- * 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;
-}
-
-/*
- * 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, --kconsumerd-cmd-sock PATH "
- "Specify path for the command socket\n");
- fprintf(stderr, " -e, --kconsumerd-err-sock PATH "
- "Specify path for the error socket\n");
- fprintf(stderr, " -d, --daemonize "
- "Start as a daemon.\n");
- fprintf(stderr, " -q, --quiet "
- "No output at all.\n");
- fprintf(stderr, " -v, --verbose "
- "Verbose mode. Activate DBG() macro.\n");
- fprintf(stderr, " -V, --version "
- "Show version number.\n");
-}
-
-/*
- * daemon argument parsing
- */
-static void parse_args(int argc, char **argv)
-{
- int c;
-
- static struct option long_options[] = {
- { "kconsumerd-cmd-sock", 1, 0, 'c' },
- { "kconsumerd-err-sock", 1, 0, 'e' },
- { "daemonize", 0, 0, 'd' },
- { "help", 0, 0, 'h' },
- { "quiet", 0, 0, 'q' },
- { "verbose", 0, 0, 'v' },
- { "version", 0, 0, 'V' },
- { NULL, 0, 0, 0 }
- };
-
- while (1) {
- int option_index = 0;
- c = getopt_long(argc, argv, "dhqvV" "c:e:", 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(command_sock_path, PATH_MAX, "%s", optarg);
- break;
- case 'e':
- snprintf(error_sock_path, PATH_MAX, "%s", optarg);
- break;
- case 'd':
- opt_daemon = 1;
- break;
- case 'h':
- usage();
- exit(EXIT_FAILURE);
- case 'q':
- opt_quiet = 1;
- break;
- case 'v':
- opt_verbose = 1;
- break;
- case 'V':
- fprintf(stdout, "%s\n", VERSION);
- exit(EXIT_SUCCESS);
- default:
- usage();
- exit(EXIT_FAILURE);
- }
- }
-}
-
-
-/*
- * main
- */
-int main(int argc, char **argv)
-{
- int i;
- int ret = 0;
- void *status;
-
- /* Parse arguments */
- progname = argv[0];
- parse_args(argc, argv);
-
- /* Daemonize */
- if (opt_daemon) {
- ret = daemon(0, 0);
- if (ret < 0) {
- perror("daemon");
- goto error;
- }
- }
-
- if (strlen(command_sock_path) == 0) {
- snprintf(command_sock_path, PATH_MAX,
- KCONSUMERD_CMD_SOCK_PATH);
- }
- kconsumerd_set_command_socket_path(command_sock_path);
- if (strlen(error_sock_path) == 0) {
- snprintf(error_sock_path, PATH_MAX,
- KCONSUMERD_ERR_SOCK_PATH);
- }
-
- if (set_signal_handler() < 0) {
- goto error;
- }
-
- /* create the pipe to wake to polling thread when needed */
- ret = kconsumerd_create_poll_pipe();
- if (ret < 0) {
- perror("Error creating poll pipe");
- goto end;
- }
-
- /* Connect to the socket created by ltt-sessiond to report errors */
- DBG("Connecting to error socket %s", error_sock_path);
- ret = lttcomm_connect_unix_sock(error_sock_path);
- /* not a fatal error, but all communication with ltt-sessiond will fail */
- if (ret < 0) {
- WARN("Cannot connect to error socket, is ltt-sessiond started ?");
- }
- kconsumerd_set_error_socket(ret);
-
- /* Create the thread to manage the receive of fd */
- ret = pthread_create(&threads[0], NULL, kconsumerd_thread_receive_fds,
- (void *) NULL);
- if (ret != 0) {
- perror("pthread_create");
- goto error;
- }
-
- /* Create thread to manage the polling/writing of traces */
- ret = pthread_create(&threads[1], NULL, kconsumerd_thread_poll_fds,
- (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;
- }
- }
- ret = EXIT_SUCCESS;
- kconsumerd_send_error(KCONSUMERD_EXIT_SUCCESS);
- goto end;
-
-error:
- ret = EXIT_FAILURE;
- kconsumerd_send_error(KCONSUMERD_EXIT_FAILURE);
-
-end:
- kconsumerd_cleanup();
-
- return ret;
-}
projects / lttng-tools.git / commitdiff
