2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; only version 2
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
32 #include <sys/socket.h>
34 #include <sys/types.h>
35 #include <urcu/list.h>
42 #include <lttng-consumerd.h>
43 #include <lttng-kernel-ctl.h>
44 #include <lttng-sessiond-comm.h>
45 #include <lttng/lttng-kconsumer.h>
46 #include <lttng/lttng-ustconsumer.h>
49 /* TODO : support UST (all direct kernctl accesses). */
51 /* the two threads (receive fd and poll) */
52 static pthread_t threads
[2];
54 /* to count the number of time the user pressed ctrl+c */
55 static int sigintcount
= 0;
57 /* Argument variables */
60 static int opt_daemon
;
61 static const char *progname
;
62 static char command_sock_path
[PATH_MAX
]; /* Global command socket path */
63 static char error_sock_path
[PATH_MAX
]; /* Global error path */
64 static enum lttng_consumer_type opt_type
= LTTNG_CONSUMER_KERNEL
;
66 /* the liblttngkconsumerd context */
67 static struct lttng_consumer_local_data
*ctx
;
70 * Signal handler for the daemon
72 static void sighandler(int sig
)
74 if (sig
== SIGINT
&& sigintcount
++ == 0) {
75 DBG("ignoring first SIGINT");
79 lttng_consumer_should_exit(ctx
);
83 * Setup signal handler for :
84 * SIGINT, SIGTERM, SIGPIPE
86 static int set_signal_handler(void)
92 if ((ret
= sigemptyset(&sigset
)) < 0) {
93 perror("sigemptyset");
97 sa
.sa_handler
= sighandler
;
100 if ((ret
= sigaction(SIGTERM
, &sa
, NULL
)) < 0) {
105 if ((ret
= sigaction(SIGINT
, &sa
, NULL
)) < 0) {
110 if ((ret
= sigaction(SIGPIPE
, &sa
, NULL
)) < 0) {
119 * usage function on stderr
121 static void usage(void)
123 fprintf(stderr
, "Usage: %s OPTIONS\n\nOptions:\n", progname
);
124 fprintf(stderr
, " -h, --help "
125 "Display this usage.\n");
126 fprintf(stderr
, " -c, --kconsumerd-cmd-sock PATH "
127 "Specify path for the command socket\n");
128 fprintf(stderr
, " -e, --kconsumerd-err-sock PATH "
129 "Specify path for the error socket\n");
130 fprintf(stderr
, " -d, --daemonize "
131 "Start as a daemon.\n");
132 fprintf(stderr
, " -q, --quiet "
133 "No output at all.\n");
134 fprintf(stderr
, " -v, --verbose "
135 "Verbose mode. Activate DBG() macro.\n");
136 fprintf(stderr
, " -V, --version "
137 "Show version number.\n");
138 fprintf(stderr
, " -k, --kernel "
139 "Consumer kernel buffers (default).\n");
140 fprintf(stderr
, " -u, --ust "
141 "Consumer UST buffers.%s\n",
142 #ifdef HAVE_LIBLTTNG_UST_CTL
145 " (support not compiled in)"
151 * daemon argument parsing
153 static void parse_args(int argc
, char **argv
)
157 static struct option long_options
[] = {
158 { "kconsumerd-cmd-sock", 1, 0, 'c' },
159 { "kconsumerd-err-sock", 1, 0, 'e' },
160 { "daemonize", 0, 0, 'd' },
161 { "help", 0, 0, 'h' },
162 { "quiet", 0, 0, 'q' },
163 { "verbose", 0, 0, 'v' },
164 { "version", 0, 0, 'V' },
165 { "kernel", 0, 0, 'k' },
166 #ifdef HAVE_LIBLTTNG_UST_CTL
167 { "ust", 0, 0, 'u' },
173 int option_index
= 0;
174 c
= getopt_long(argc
, argv
, "dhqvVku" "c:e:", long_options
, &option_index
);
181 fprintf(stderr
, "option %s", long_options
[option_index
].name
);
183 fprintf(stderr
, " with arg %s\n", optarg
);
187 snprintf(command_sock_path
, PATH_MAX
, "%s", optarg
);
190 snprintf(error_sock_path
, PATH_MAX
, "%s", optarg
);
205 fprintf(stdout
, "%s\n", VERSION
);
208 opt_type
= LTTNG_CONSUMER_KERNEL
;
210 #ifdef HAVE_LIBLTTNG_UST_CTL
212 opt_type
= LTTNG_CONSUMER_UST
;
225 int main(int argc
, char **argv
)
231 /* Parse arguments */
233 parse_args(argc
, argv
);
244 if (strlen(command_sock_path
) == 0) {
245 snprintf(command_sock_path
, PATH_MAX
,
246 opt_type
== LTTNG_CONSUMER_KERNEL
?
247 KCONSUMERD_CMD_SOCK_PATH
:
248 USTCONSUMERD_CMD_SOCK_PATH
);
250 /* create the consumer instance with and assign the callbacks */
251 ctx
= lttng_consumer_create(opt_type
, lttng_consumer_read_subbuffer
,
252 NULL
, lttng_consumer_on_recv_stream
, NULL
);
257 lttng_consumer_set_command_sock_path(ctx
, command_sock_path
);
258 if (strlen(error_sock_path
) == 0) {
259 snprintf(error_sock_path
, PATH_MAX
,
260 opt_type
== LTTNG_CONSUMER_KERNEL
?
261 KCONSUMERD_ERR_SOCK_PATH
:
262 USTCONSUMERD_ERR_SOCK_PATH
);
265 if (set_signal_handler() < 0) {
269 /* Connect to the socket created by lttng-sessiond to report errors */
270 DBG("Connecting to error socket %s", error_sock_path
);
271 ret
= lttcomm_connect_unix_sock(error_sock_path
);
272 /* not a fatal error, but all communication with lttng-sessiond will fail */
274 WARN("Cannot connect to error socket, is lttng-sessiond started ?");
276 lttng_consumer_set_error_sock(ctx
, ret
);
278 /* Create the thread to manage the receive of fd */
279 ret
= pthread_create(&threads
[0], NULL
, lttng_consumer_thread_receive_fds
,
282 perror("pthread_create");
286 /* Create thread to manage the polling/writing of traces */
287 ret
= pthread_create(&threads
[1], NULL
, lttng_consumer_thread_poll_fds
,
290 perror("pthread_create");
294 for (i
= 0; i
< 2; i
++) {
295 ret
= pthread_join(threads
[i
], &status
);
297 perror("pthread_join");
302 lttng_consumer_send_error(ctx
, CONSUMERD_EXIT_SUCCESS
);
307 lttng_consumer_send_error(ctx
, CONSUMERD_EXIT_FAILURE
);
310 lttng_consumer_destroy(ctx
);
311 lttng_consumer_cleanup();