* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
#define _LGPL_SOURCE
#include <assert.h>
#include <ctype.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
+#include <signal.h>
+#include <sys/wait.h>
#include <common/mi-lttng.h>
+#include <common/config/session-config.h>
#include "../command.h"
#include "../utils.h"
static char *opt_url;
static char *opt_ctrl_url;
static char *opt_data_url;
+static char *opt_shm_path;
+static char *opt_template_path;
static int opt_no_consumer;
static int opt_no_output;
static int opt_snapshot;
OPT_LIVE_TIMER,
};
+enum output_type {
+ OUTPUT_UNKNOWN = -1,
+ OUTPUT_NONE,
+ OUTPUT_LOCAL,
+ OUTPUT_NET,
+};
+enum session_type {
+ SESSION_UNKNOWN = -1,
+ SESSION_NORMAL,
+ SESSION_LIVE,
+ SESSION_SNAPSHOT,
+};
+
+
static struct mi_writer *writer;
static struct poptOption long_options[] = {
{"no-consumer", 0, POPT_ARG_VAL, &opt_no_consumer, 1, 0, 0},
{"snapshot", 0, POPT_ARG_VAL, &opt_snapshot, 1, 0, 0},
{"live", 0, POPT_ARG_INT | POPT_ARGFLAG_OPTIONAL, 0, OPT_LIVE_TIMER, 0, 0},
+ {"shm-path", 0, POPT_ARG_STRING, &opt_shm_path, 0, 0, 0},
+ {"template-path", 0, POPT_ARG_STRING, &opt_template_path, 0, 0, 0},
{0, 0, 0, 0, 0, 0, 0}
};
* why this declaration exists and used ONLY in for this command.
*/
extern int _lttng_create_session_ext(const char *name, const char *url,
- const char *datetime, int live_timer);
-
-/*
- * usage
- */
-static void usage(FILE *ofp)
-{
- fprintf(ofp, "usage: lttng create [NAME] [OPTIONS] \n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Without a given NAME, the default is 'auto-<yyyymmdd>-<hhmmss>'\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Options:\n");
- fprintf(ofp, " -h, --help Show this help\n");
- fprintf(ofp, " --list-options Simple listing of options\n");
- fprintf(ofp, " -o, --output PATH Specify output path for traces\n");
- fprintf(ofp, " --no-output Traces will not be outputted\n");
- fprintf(ofp, " --snapshot Set the session in snapshot mode.\n");
- fprintf(ofp, " Created in no-output mode and uses the URL,\n");
- fprintf(ofp, " if one, as the default snapshot output.\n");
- fprintf(ofp, " Every channel will be set in overwrite mode\n");
- fprintf(ofp, " and with mmap output (splice not supported).\n");
- fprintf(ofp, " --live [USEC] Set the session in live-reading mode.\n");
- fprintf(ofp, " The delay parameter in micro-seconds is the\n");
- fprintf(ofp, " maximum time the user can wait for the data\n");
- fprintf(ofp, " to be flushed. Can be set with a network\n");
- fprintf(ofp, " URL (-U or -C/-D) and must have a relayd listening.\n");
- fprintf(ofp, " By default, %u is used for the timer and the\n",
- DEFAULT_LTTNG_LIVE_TIMER);
- fprintf(ofp, " network URL is set to net://127.0.0.1.\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Extended Options:\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Using these options, each API call can be controlled individually.\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " -U, --set-url=URL Set URL destination of the trace data.\n");
- fprintf(ofp, " It is persistent for the session lifetime.\n");
- fprintf(ofp, " This will set both data and control URL.\n");
- fprintf(ofp, " -C, --ctrl-url=URL Set control path URL. (Must use -D also)\n");
- fprintf(ofp, " -D, --data-url=URL Set data path URL. (Must use -C also)\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Please refer to the man page (lttng(1)) for more information on network\n");
- fprintf(ofp, "streaming mechanisms and explanation of the control and data port\n");
- fprintf(ofp, "You must have a running remote lttng-relayd for network streaming\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "URL format is has followed:\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " proto://[HOST|IP][:PORT1[:PORT2]][/TRACE_PATH]\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " Supported protocols are (proto):\n");
- fprintf(ofp, " > file://...\n");
- fprintf(ofp, " Local filesystem full path.\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " > net[6]://...\n");
- fprintf(ofp, " This will use the default network transport layer which is\n");
- fprintf(ofp, " TCP for both control (PORT1) and data port (PORT2).\n");
- fprintf(ofp, " The default ports are respectively 5342 and 5343.\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " > tcp[6]://...\n");
- fprintf(ofp, " Can only be used with -C and -D together\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "NOTE: IPv6 address MUST be enclosed in brackets '[]' (rfc2732)\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Examples:\n");
- fprintf(ofp, " # lttng create -U net://192.168.1.42\n");
- fprintf(ofp, " Uses TCP and default ports for the given destination.\n");
- fprintf(ofp, " # lttng create -U net6://[fe80::f66d:4ff:fe53:d220]\n");
- fprintf(ofp, " Uses TCP, default ports and IPv6.\n");
- fprintf(ofp, " # lttng create s1 -U net://myhost.com:3229\n");
- fprintf(ofp, " Set the consumer to the remote HOST on port 3229 for control.\n");
- fprintf(ofp, "\n");
-}
+ const char *datetime);
/*
* Retrieve the created session and mi output it based on provided argument
{
int ret;
struct lttng_handle *handle;
- struct lttng_domain dom;
assert(session_name);
/*
- * Set handle with the session name and the domain set to 0. This means to
- * the session daemon that the next action applies on the tracing session
- * rather then the domain specific session.
+ * Set handle with the session_name, but no domain. This implies that
+ * the actions taken with this handle apply on the tracing session
+ * rather then the domain-specific session.
*/
- memset(&dom, 0, sizeof(dom));
-
- handle = lttng_create_handle(session_name, &dom);
+ handle = lttng_create_handle(session_name, NULL);
if (handle == NULL) {
ret = CMD_FATAL;
goto error;
goto error;
}
- if (ctrl_url) {
- MSG("Control URL %s set for session %s", ctrl_url, session_name);
- }
-
- if (data_url) {
- MSG("Data URL %s set for session %s", data_url, session_name);
- }
-
error:
lttng_destroy_handle(handle);
return ret;
}
/*
- * Create a tracing session.
- * If no name is specified, a default name is generated.
+ * Validate the combinations of passed options
*
- * Returns one of the CMD_* result constants.
+ * CMD_ERROR on error
+ * CMD_SUCCESS on success
*/
-static int create_session(void)
+static int validate_command_options(enum session_type type)
{
- int ret;
- char *session_name = NULL, *traces_path = NULL, *alloc_path = NULL;
- char *alloc_url = NULL, *url = NULL, datetime[16];
- char session_name_date[NAME_MAX + 17], *print_str_url = NULL;
- time_t rawtime;
- struct tm *timeinfo;
-
- /* Get date and time for automatic session name/path */
- time(&rawtime);
- timeinfo = localtime(&rawtime);
- strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo);
+ int ret = CMD_SUCCESS;
- /* Auto session name creation */
- if (opt_session_name == NULL) {
- ret = snprintf(session_name_date, sizeof(session_name_date),
- DEFAULT_SESSION_NAME "-%s", datetime);
- if (ret < 0) {
- PERROR("snprintf session name");
- goto error;
- }
- session_name = session_name_date;
- DBG("Auto session name set to %s", session_name_date);
- } else {
- if (strlen(opt_session_name) > NAME_MAX) {
- ERR("Session name too long. Length must be lower or equal to %d",
- NAME_MAX);
- ret = LTTNG_ERR_SESSION_FAIL;
- goto error;
- }
- /*
- * Check if the session name begins with "auto-" or is exactly "auto".
- * Both are reserved for the default session name. See bug #449 to
- * understand why we need to check both here.
- */
- if ((strncmp(opt_session_name, DEFAULT_SESSION_NAME "-",
- strlen(DEFAULT_SESSION_NAME) + 1) == 0) ||
- (strncmp(opt_session_name, DEFAULT_SESSION_NAME,
- strlen(DEFAULT_SESSION_NAME)) == 0 &&
- strlen(opt_session_name) == strlen(DEFAULT_SESSION_NAME))) {
- ERR("%s is a reserved keyword for default session(s)",
- DEFAULT_SESSION_NAME);
- ret = CMD_ERROR;
- goto error;
- }
- session_name = opt_session_name;
- ret = snprintf(session_name_date, sizeof(session_name_date),
- "%s-%s", session_name, datetime);
- if (ret < 0) {
- PERROR("snprintf session name");
- goto error;
- }
+ if (opt_snapshot && opt_live_timer) {
+ ERR("Snapshot and live modes are mutually exclusive.");
+ ret = CMD_ERROR;
+ goto error;
}
if ((!opt_ctrl_url && opt_data_url) || (opt_ctrl_url && !opt_data_url)) {
- ERR("You need both control and data URL.");
+ ERR("Control and data URLs must both be set.");
ret = CMD_ERROR;
goto error;
}
- if (opt_output_path != NULL) {
- traces_path = utils_expand_path(opt_output_path);
- if (traces_path == NULL) {
+ if (opt_template_path) {
+ /* Restriction on flags exist when using template */
+ /* Session type flags are not permitted */
+ /* --live & --snapshot */
+ if ((opt_live_timer && type != SESSION_LIVE) ||
+ (opt_snapshot && type != SESSION_SNAPSHOT)) {
+ ERR("It is not possible to change the session type of a template");
ret = CMD_ERROR;
goto error;
}
+ }
- /* Create URL string from the local file system path */
- ret = asprintf(&alloc_url, "file://%s", traces_path);
- if (ret < 0) {
- PERROR("asprintf url path");
- ret = CMD_FATAL;
- goto error;
- }
- /* URL to use in the lttng_create_session() call */
- url = alloc_url;
- print_str_url = traces_path;
- } else if (opt_url) { /* Handling URL (-U opt) */
- url = opt_url;
- print_str_url = url;
- } else if (opt_data_url && opt_ctrl_url) {
- /*
- * With both control and data, we'll be setting the consumer URL after
- * session creation thus use no URL.
- */
- url = NULL;
- } else if (!opt_no_output) {
- char *tmp_path;
-
- /* Auto output path */
- tmp_path = utils_get_home_dir();
- if (tmp_path == NULL) {
- ERR("HOME path not found.\n \
- Please specify an output path using -o, --output PATH");
- ret = CMD_FATAL;
- goto error;
- }
- alloc_path = strdup(tmp_path);
- if (!alloc_path) {
- PERROR("allocating alloc_path");
- ret = CMD_FATAL;
- goto error;
- }
- ret = asprintf(&alloc_url,
- "file://%s/" DEFAULT_TRACE_DIR_NAME "/%s",
- alloc_path, session_name_date);
- if (ret < 0) {
- PERROR("asprintf trace dir name");
- ret = CMD_FATAL;
- goto error;
- }
+error:
+ return ret;
+}
- url = alloc_url;
- print_str_url = alloc_url + strlen("file://");
+/*
+ * Create a session using direct calls to liblttng-ctl.
+ *
+ * Return CMD_SUCCESS on success, negative value on internal lttng errors and positive
+ * value on command errors.
+ */
+static int create_session_basic (const char *session_name,
+ enum session_type session_type,
+ int live_timer,
+ enum output_type output_type,
+ const char* url,
+ const char* ctrl_url,
+ const char* data_url,
+ const char* shm_path,
+ const char* datetime)
+{
+ /* Create session based on session creation */
+ int ret = CMD_SUCCESS;
+ const char *pathname;
+
+ assert(datetime);
+
+ if (opt_relayd_path) {
+ pathname = opt_relayd_path;
} else {
- /* No output means --no-output or --snapshot mode. */
- url = NULL;
+ pathname = INSTALL_BIN_PATH "/lttng-relayd";
}
- /* Use default live URL if NO url is/are found. */
- if ((opt_live_timer && !opt_url) && (opt_live_timer && !opt_data_url)) {
- ret = asprintf(&alloc_url, "net://127.0.0.1");
- if (ret < 0) {
- PERROR("asprintf default live URL");
- ret = CMD_FATAL;
+ switch (session_type) {
+ case SESSION_NORMAL:
+ ret = _lttng_create_session_ext(session_name, url, datetime);
+ break;
+ case SESSION_SNAPSHOT:
+ if (output_type == OUTPUT_NONE) {
+ ERR("--no-output on a snapshot session is invalid");
+ ret = CMD_UNSUPPORTED;
goto error;
}
- url = alloc_url;
- print_str_url = url;
- }
-
- if (opt_snapshot && opt_live_timer) {
- ERR("Snapshot and live modes are mutually exclusive.");
- ret = CMD_ERROR;
- goto error;
- }
-
- if (opt_snapshot) {
- /* No output by default. */
- const char *snapshot_url = NULL;
-
- if (opt_url) {
- snapshot_url = url;
- } else if (!opt_data_url && !opt_ctrl_url) {
- /* This is the session path that we need to use as output. */
- snapshot_url = url;
+ ret = lttng_create_session_snapshot(session_name, url);
+ break;
+ case SESSION_LIVE:
+ if (output_type == OUTPUT_NONE) {
+ ERR("--no-output on a live session is invalid");
+ ret = CMD_UNSUPPORTED;
+ goto error;
}
- ret = lttng_create_session_snapshot(session_name, snapshot_url);
- } else if (opt_live_timer) {
- const char *pathname;
- if (opt_relayd_path) {
- pathname = opt_relayd_path;
- } else {
- pathname = INSTALL_BIN_PATH "/lttng-relayd";
+ if (output_type == OUTPUT_LOCAL) {
+ ERR("Local file output on a live session is invalid");
+ ret = CMD_UNSUPPORTED;
+ goto error;
}
- if (!opt_url && !opt_data_url && !check_relayd() &&
+ if (output_type != OUTPUT_NET && !check_relayd() &&
spawn_relayd(pathname, 0) < 0) {
+ ret = CMD_FATAL;
goto error;
}
- ret = lttng_create_session_live(session_name, url, opt_live_timer);
- } else {
- ret = _lttng_create_session_ext(session_name, url, datetime, -1);
+ ret = lttng_create_session_live(session_name, url, live_timer);
+ break;
+ default:
+ ERR("Unknown session type");
+ ret = CMD_UNDEFINED;
+ goto error;
}
+
if (ret < 0) {
- /* Don't set ret so lttng can interpret the sessiond error. */
+ /* Don't set ret so the sessiond error is propagated. */
switch (-ret) {
case LTTNG_ERR_EXIST_SESS:
WARN("Session %s already exists", session_name);
goto error;
}
- if (opt_ctrl_url && opt_data_url) {
- if (opt_snapshot) {
- ret = add_snapshot_output(session_name, opt_ctrl_url,
- opt_data_url);
+ /* Configure the session based on the output type */
+ switch (output_type) {
+ case OUTPUT_LOCAL:
+ break;
+ case OUTPUT_NET:
+ if (!ctrl_url || !data_url) {
+ break;
+ }
+
+ if (session_type == SESSION_SNAPSHOT) {
+ ret = add_snapshot_output(session_name, ctrl_url,
+ data_url);
} else {
- /* Setting up control URI (-C or/and -D opt) */
- ret = set_consumer_url(session_name, opt_ctrl_url, opt_data_url);
+ /*
+ * Normal sessions and live sessions behave the same way
+ * regarding consumer url.
+ */
+ ret = set_consumer_url(session_name, ctrl_url, data_url);
+ }
+ if (ret < 0) {
+ /* Destroy created session on errors */
+ lttng_destroy_session(session_name);
+ goto error;
}
+ break;
+ case OUTPUT_NONE:
+ break;
+ default:
+ ERR("Unknown output type");
+ ret = CMD_UNDEFINED;
+ goto error;
+ }
+
+ /*
+ * Set the session shared memory path
+ */
+ if (shm_path) {
+ ret = lttng_set_session_shm_path(session_name, shm_path);
if (ret < 0) {
- /* Destroy created session because the URL are not valid. */
lttng_destroy_session(session_name);
goto error;
}
}
+error:
+ return ret;
+}
+
+static int generate_output(const char *session_name,
+ enum session_type session_type,
+ int live_timer,
+ enum output_type output_type,
+ const char* url,
+ const char* ctrl_url,
+ const char* data_url,
+ const char* shm_path)
+{
+ int ret = CMD_SUCCESS;
+
+ /*
+ * TODO move this to after session name
+ * for now we only emulate previous behaviour.
+ */
+ if (session_type != SESSION_SNAPSHOT) {
+ if (ctrl_url) {
+ MSG("Control URL %s set for session %s", ctrl_url, session_name);
+ }
+
+ if (data_url) {
+ MSG("Data URL %s set for session %s", data_url, session_name);
+ }
+ }
+
+ if (url && output_type == OUTPUT_LOCAL) {
+ /* Remove the file:// */
+ if (strlen(url) > strlen("file://")){
+ url = url + strlen("file://");
+ }
+ }
MSG("Session %s created.", session_name);
- if (print_str_url && !opt_snapshot) {
- MSG("Traces will be written in %s", print_str_url);
+ if (url && session_type != SESSION_SNAPSHOT) {
+ MSG("Traces will be written in %s", url);
- if (opt_live_timer) {
- MSG("Live timer set to %u usec", opt_live_timer);
+ if (live_timer) {
+ MSG("Live timer set to %u usec", live_timer);
}
- } else if (opt_snapshot) {
- if (print_str_url) {
- MSG("Default snapshot output set to: %s", print_str_url);
+ } else if (session_type == SESSION_SNAPSHOT) {
+ if (url) {
+ MSG("Default snapshot output set to: %s", url);
}
MSG("Snapshot mode set. Every channel enabled for that session will "
- "be set in overwrite mode and mmap output.");
+ "be set to mmap output, and default to overwrite mode.");
+ }
+
+ if (shm_path) {
+ MSG("Session %s set to shm_path: %s.", session_name,
+ shm_path);
}
/* Mi output */
goto error;
}
}
-
- /* Init lttng session config */
- ret = config_init(session_name);
- if (ret < 0) {
- ret = CMD_ERROR;
- goto error;
- }
-
- ret = CMD_SUCCESS;
-
error:
- free(alloc_url);
- free(traces_path);
- free(alloc_path);
-
- if (ret < 0) {
- ERR("%s", lttng_strerror(ret));
- }
return ret;
}
-/*
- * The 'create <options>' first level command
- *
- * Returns one of the CMD_* result constants.
- */
-int cmd_create(int argc, const char **argv)
+static int parse_template (struct config_document *template,
+ char **session_name,
+ enum session_type *session_type,
+ int *live_timer,
+ enum output_type *output_type,
+ char **url,
+ char **ctrl_url,
+ char **data_url,
+ char **shm_path)
{
- int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
- char *opt_arg = NULL;
- static poptContext pc;
-
- pc = poptGetContext(NULL, argc, argv, long_options, 0);
- poptReadDefaultConfig(pc, 0);
-
- while ((opt = poptGetNextOpt(pc)) != -1) {
- switch (opt) {
- case OPT_HELP:
- usage(stdout);
- goto end;
- case OPT_LIST_OPTIONS:
- list_cmd_options(stdout, long_options);
- goto end;
- case OPT_LIVE_TIMER:
- {
- unsigned long v;
+ int ret = 0;
+ int printed_bytes;
+ char *raw_value = NULL;
+
+ assert(template);
+
+ /* Session name */
+ *session_name = config_document_get_element_value(template,"/sessions/session/name");
+
+ /* Check the type of session we have in the template */
+ if(config_document_element_exist(template, "/sessions/session/attributes/snapshot_mode")) {
+ *session_type = SESSION_SNAPSHOT;
+ } else if (config_document_element_exist(template, "/sessions/session/attributes/live_timer_interval")) {
+ *session_type = SESSION_LIVE;
+ raw_value = config_document_get_element_value(template,"/sessions/session/attributes/live_timer_interval");
+ *live_timer = config_parse_value(raw_value);
+ free(raw_value);
+ raw_value = NULL;
+ } else {
+ *session_type = SESSION_NORMAL;
+ }
- errno = 0;
- opt_arg = poptGetOptArg(pc);
- if (!opt_arg) {
- /* Set up default values. */
- opt_live_timer = (uint32_t) DEFAULT_LTTNG_LIVE_TIMER;
- DBG("Session live timer interval set to default value %d",
- opt_live_timer);
- break;
+ /* Output */
+ switch (*session_type) {
+ case SESSION_NORMAL:
+ case SESSION_LIVE:
+ if (!config_document_element_exist(template, "/sessions/session/output/consumer_output/destination")){
+ break;
+ }
+ if (config_document_element_exist(template, "/sessions/session/output/consumer_output/destination/path")){
+ raw_value = config_document_get_element_value(template, "/sessions/session/output/consumer_output/destination/path");
+ if (!raw_value) {
+ ret = -1;
+ goto error;
}
- v = strtoul(opt_arg, NULL, 0);
- if (errno != 0 || !isdigit(opt_arg[0])) {
- ERR("Wrong value in --live parameter: %s", opt_arg);
- ret = CMD_ERROR;
- goto end;
+ if (strlen(raw_value) > 0) {
+ *output_type = OUTPUT_LOCAL;
+ printed_bytes = asprintf(url, "file://%s", raw_value);
+ if (printed_bytes < 0) {
+ ret = -1;
+ goto error;
+ }
+ } else {
+ *output_type = OUTPUT_NONE;
}
- if (v != (uint32_t) v) {
- ERR("32-bit overflow in --live parameter: %s", opt_arg);
- ret = CMD_ERROR;
- goto end;
+
+ free(raw_value);
+ raw_value = NULL;
+ break;
+ } else if(config_document_element_exist(template, "/sessions/session/output/consumer_output/destination/net_output")) {
+ *ctrl_url = config_document_get_element_value(template, "/sessions/session/output/consumer_output/destination/net_output/control_uri");
+ *data_url = config_document_get_element_value(template, "/sessions/session/output/consumer_output/destination/net_output/data_uri");
+ if (!*ctrl_url || ! *data_url) {
+ ret = -1;
+ goto error;
}
- opt_live_timer = (uint32_t) v;
- DBG("Session live timer interval set to %d", opt_live_timer);
+ *output_type = OUTPUT_NET;
+ } else {
+ /* There is no output definition */
+ }
+ break;
+ case SESSION_SNAPSHOT:
+ if (!config_document_element_exist(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination")){
break;
}
- default:
- usage(stderr);
- ret = CMD_UNDEFINED;
- goto end;
+ if (config_document_element_exist(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/path")){
+ raw_value = config_document_get_element_value(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/path");
+ if (!raw_value) {
+ ret = -1;
+ goto error;
+ }
+
+ if (strlen(raw_value) > 0) {
+ *output_type = OUTPUT_LOCAL;
+ printed_bytes = asprintf(url, "file://%s", raw_value);
+ if (printed_bytes < 0) {
+ ret = -1;
+ goto error;
+ }
+ } else {
+ *output_type = OUTPUT_NONE;
+ }
+
+ free(raw_value);
+ raw_value = NULL;
+ break;
+ } else if(config_document_element_exist(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/net_output")) {
+ *ctrl_url = config_document_get_element_value(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/net_output/control_uri");
+ *data_url = config_document_get_element_value(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/net_output/data_uri");
+ if (!*ctrl_url || ! *data_url) {
+ ret = -1;
+ goto error;
+ }
+ *output_type = OUTPUT_NET;
+ } else {
+ /* There is no output definition */
}
+ break;
+ case SESSION_UNKNOWN:
+ ret = -1;
+ goto error;
}
- if (opt_no_consumer) {
- MSG("The option --no-consumer is obsolete. Use --no-output now.");
- ret = CMD_WARNING;
- goto end;
- }
- /* MI initialization */
- if (lttng_opt_mi) {
- writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
- if (!writer) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
+ /* shared memory path */
+ *shm_path = config_document_get_element_value(template,"/sessions/session/shared_memory_path");
- /* Open command element */
- ret = mi_lttng_writer_command_open(writer,
- mi_lttng_element_command_create);
- if (ret) {
+error:
+ free(raw_value);
+ return ret;
+
+}
+static int create_session_from_template(struct config_document *template,
+ const char *session_name,
+ enum session_type session_type,
+ int live_timer,
+ enum output_type output_type,
+ const char *url,
+ const char *ctrl_url,
+ const char *data_url,
+ const char *shm_path,
+ const char *datetime)
+{
+ int ret = CMD_SUCCESS;
+ int printed_bytes;
+ struct config_element *temp_element = NULL;
+ struct config_element *temp_element_child = NULL;
+ char tmp_ctrl_uri[PATH_MAX];
+ char tmp_data_uri[PATH_MAX];
+ struct lttng_uri *uris = NULL;
+ ssize_t uri_array_size = 0;
+ char *tmp_string = NULL;
+
+ assert(template);
+ assert(session_name);
+
+ memset(tmp_ctrl_uri, 0, sizeof(tmp_ctrl_uri));
+ memset(tmp_data_uri, 0, sizeof(tmp_data_uri));
+
+ /* Session name */
+ if (config_document_element_exist(template, "/sessions/session/name")) {
+ /* Replace the node value */
+ config_document_replace_element_value(template, "/sessions/session/name", session_name);
+ } else {
+ /* insert the node */
+ temp_element = config_element_create("name", session_name);
+ if (!temp_element) {
+ ERR("Could not create session name node configuration");
ret = CMD_ERROR;
- goto end;
+ goto error;
}
-
- /* Open output element */
- ret = mi_lttng_writer_open_element(writer,
- mi_lttng_element_command_output);
+ ret = config_document_insert_element(template, "/sessions/session", temp_element);
if (ret) {
+ ERR("Could not insert session name node configuration");
ret = CMD_ERROR;
- goto end;
+ goto error;
}
+ config_element_free(temp_element);
}
- opt_session_name = (char*) poptGetArg(pc);
- command_ret = create_session();
+ /*
+ * Live timer
+ */
+ if (session_type == SESSION_LIVE) {
+ if (config_document_element_exist(template, "/sessions/session/attributes/live_timer_interval")) {
+ printed_bytes = asprintf(&tmp_string, "%d", live_timer);
+ if (printed_bytes < 0) {
+ ERR("Asprintf failed for live timer");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ ret = config_document_replace_element_value(template, "/sessions/session/attributes/live_timer_interval", tmp_string);
+
+ if (ret) {
+ printf("error: %d\n", ret);
+ ERR("Replacement of live_timer_interval failed");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ free(tmp_string);
+ tmp_string = NULL;
+ } else {
+ ERR("Invalid live timer template. Missing live timer node");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ }
+
+ /*
+ * Generate the output node
+ */
+
+ /* Get output from urls */
+ if (url) {
+ /* Get lttng uris from single url */
+ uri_array_size = uri_parse_str_urls(url, NULL, &uris);
+ if (uri_array_size < 0) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ } else if (ctrl_url && data_url) {
+ uri_array_size = uri_parse_str_urls(ctrl_url, data_url, &uris);
+ if (uri_array_size < 0) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ } else {
+ /* --no-output */
+ uri_array_size = 0;
+ }
+
+ /* Validate if the session output type still match the passed data */
+ if ( (uri_array_size == 0 && output_type != OUTPUT_NONE) ||
+ (uri_array_size == 1 && output_type != OUTPUT_LOCAL) ||
+ (uri_array_size == 2 && output_type != OUTPUT_NET)) {
+ ERR("Overwriting value for output do not match the base output type");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ switch (output_type) {
+ case OUTPUT_NONE:
+ temp_element_child = config_element_create("path", "");
+ if (!temp_element_child) {
+ ERR("Could not create empty path node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ break;
+ case OUTPUT_LOCAL:
+ temp_element_child = config_element_create("path", uris[0].dst.path);
+ if (!temp_element_child) {
+ ERR("Could not create local path node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ break;
+ case OUTPUT_NET:
+ uri_to_str_url(&uris[0], tmp_ctrl_uri, sizeof(tmp_ctrl_uri));
+ uri_to_str_url(&uris[1], tmp_data_uri, sizeof(tmp_data_uri));
+
+ temp_element_child = config_element_create("net_output", NULL);
+ if (!temp_element_child) {
+ ERR("Could not create net_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ temp_element = config_element_create("control_uri", tmp_ctrl_uri);
+ if (!temp_element_child) {
+ ERR("Could not create ctrl uri node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element_child, temp_element);
+ if (ret) {
+ ERR("Could not append control uri to the net_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element);
+ temp_element = NULL;
+
+ temp_element = config_element_create("data_uri", tmp_data_uri);
+
+ if (!temp_element_child) {
+ ERR("Could not create data_uri configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element_child, temp_element);
+ if (ret) {
+ ERR("Could not append data uri to the net_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ config_element_free(temp_element);
+ temp_element = NULL;
+ break;
+ default:
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ temp_element = config_element_create("destination", NULL);
+ if (!temp_element) {
+ ERR("Could not create destination node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append output data to the destination node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = NULL;
+
+ /* Construct the output/consumer_output/ node*/
+ temp_element_child = temp_element;
+ temp_element = config_element_create("consumer_output", NULL);
+ if (!temp_element) {
+ ERR("Could not create consumer_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append output data to the consumer_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = config_element_create("enabled", "true");
+ if (!temp_element_child) {
+ ERR("Could not create enbaled node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append node to the consumer_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = NULL;
+
+
+ temp_element_child = temp_element;
+ temp_element = config_element_create("output", NULL);
+ if (!temp_element) {
+ ERR("Could not create output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append output data to the output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = NULL;
+
+
+ /*
+ * validate and replace the destination node for each session type
+ * TODO: export string as const and simply assign a base path for the
+ * destination node based on the session type
+ **/
+ switch (session_type) {
+ case SESSION_NORMAL:
+ case SESSION_LIVE:
+ break;
+ case SESSION_SNAPSHOT:
+ /* construct the output/snapshots_outputs/ */
+ temp_element_child = temp_element;
+ temp_element = config_element_create("snapshot_outputs", NULL);
+ if (!temp_element) {
+ ERR("Could not create snapshot_outputs node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append output data to the snapshot_outputs node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = NULL;
+
+ temp_element_child = temp_element;
+ temp_element = config_element_create("output", NULL);
+ if (!temp_element) {
+ ERR("Could not create output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append output data to the output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = NULL;
+ break;
+ default:
+ ERR("Invalid session type");
+ ret = CMD_UNDEFINED;
+ goto error;
+ }
+
+ if (!config_document_element_exist(template, "/sessions/session/output")) {
+ ret = config_document_insert_element(template, "/sessions/session", temp_element);
+ } else {
+ ret = config_document_replace_element(template, "/sessions/session/output", temp_element);
+ }
+
+ config_element_free(temp_element);
+ temp_element = NULL;
+
+ if (ret) {
+ ERR("%s", lttng_strerror(ret));
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+
+ /* Shm path */
+ if (shm_path && config_document_element_exist(template, "/sessions/session/shared_memory_path")) {
+ /* Replace the node value */
+ config_document_replace_element_value(template, "/sessions/session/shared_memory_path", shm_path);
+ } else if (shm_path) {
+ /* insert the node */
+ temp_element = config_element_create("shared_memory_path", shm_path);
+ if (!temp_element) {
+ ERR("Could not create shared_memory_path node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ ret = config_document_insert_element(template, "/sessions/session", temp_element);
+ if (ret) {
+ ERR("Could not insert shared_memory_path node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element);
+ temp_element = NULL;
+ }
+
+ ret = config_load_configuration_sessions(template, session_name, 0);
+
+
+error:
+ config_element_free(temp_element);
+ config_element_free(temp_element_child);
+ free(tmp_string);
+ free(uris);
+ return ret;
+
+}
+
+/*
+ * Create a tracing session.
+ * If no name is specified, a default name is generated.
+ *
+ * Returns one of the CMD_* result constants.
+ */
+static int create_session(void)
+{
+ int ret;
+ int printed_bytes;
+
+
+ /* Template */
+ struct config_document *template = NULL;
+
+ /* Base data */
+ enum session_type base_session_type = SESSION_UNKNOWN;
+ enum output_type base_output_type = OUTPUT_UNKNOWN;
+ char *base_session_name = NULL;
+ char *base_url = NULL;
+ char *base_ctrl_url = NULL;
+ char *base_data_url = NULL;
+ char *base_shm_path = NULL;
+ int base_live_timer = 0;
+
+ /* Time data */
+ char datetime[16];
+ time_t rawtime;
+ struct tm *timeinfo = NULL;
+
+ /* Temporary variables */
+ char *traces_path = NULL;
+ char *temp_url = NULL;
+ char *session_name_date = NULL;
+ char *tmp_url = NULL;
+ char *tmp_home_path = NULL;
+ struct lttng_uri *uris = NULL;
+ ssize_t uri_array_size = 0;
+
+
+ /* Get date and time for automatic session name/path */
+ time(&rawtime);
+ timeinfo = localtime(&rawtime);
+ strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo);
+
+ if (opt_template_path) {
+ /* Restriction on flags exist when using template */
+ /* Session type flags are not permitted */
+ /* --live & --snapshot */
+ template = config_document_get(opt_template_path);
+ if (!template) {
+ ERR("Template could not be parsed");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ /* Load info from template if any */
+ /* TODO: might want to use a struct in the end for the session... */
+ ret = parse_template(template, &base_session_name,
+ &base_session_type,
+ &base_live_timer,
+ &base_output_type,
+ &base_url,
+ &base_ctrl_url,
+ &base_data_url,
+ &base_shm_path);
+ if (ret) {
+ goto error;
+ }
+ }
+
+ /* Option validation */
+ if (validate_command_options(base_session_type) != CMD_SUCCESS) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* Find the session type based on options */
+ if(base_session_type == SESSION_UNKNOWN) {
+ if (opt_snapshot) {
+ base_session_type = SESSION_SNAPSHOT;
+ } else if (opt_live_timer) {
+ base_session_type = SESSION_LIVE;
+ } else {
+ base_session_type = SESSION_NORMAL;
+ }
+ }
+
+ /*
+ * Session name handling
+ */
+ if (opt_session_name) {
+ /* Override the session name */
+ if (strlen(opt_session_name) > NAME_MAX) {
+ ERR("Session name too long. Length must be lower or equal to %d",
+ NAME_MAX);
+ ret = LTTNG_ERR_SESSION_FAIL;
+ free(session_name_date);
+ goto error;
+ }
+ /*
+ * Check if the session name begins with "auto-" or is exactly "auto".
+ * Both are reserved for the default session name. See bug #449 to
+ * understand why we need to check both here.
+ */
+ if ((strncmp(opt_session_name, DEFAULT_SESSION_NAME "-",
+ strlen(DEFAULT_SESSION_NAME) + 1) == 0) ||
+ (strncmp(opt_session_name, DEFAULT_SESSION_NAME,
+ strlen(DEFAULT_SESSION_NAME)) == 0 &&
+ strlen(opt_session_name) == strlen(DEFAULT_SESSION_NAME))) {
+ ERR("%s is a reserved keyword for default session(s)",
+ DEFAULT_SESSION_NAME);
+
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ base_session_name = strndup(opt_session_name, NAME_MAX);
+ if (!base_session_name) {
+ PERROR("Strdup session name");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ printed_bytes = asprintf(&session_name_date, "%s-%s", base_session_name, datetime);
+ if (printed_bytes < 0) {
+ PERROR("Asprintf session name");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ DBG("Session name from command option set to %s", base_session_name);
+ } else if (base_session_name) {
+ printed_bytes = asprintf(&session_name_date, "%s-%s", base_session_name, datetime);
+ if (printed_bytes < 0) {
+ PERROR("Asprintf session name");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ } else {
+ /* Generate a name */
+ printed_bytes = asprintf(&base_session_name, DEFAULT_SESSION_NAME "-%s", datetime);
+ if (printed_bytes < 0) {
+ PERROR("Asprintf session name");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ session_name_date = strdup(base_session_name);
+ DBG("Auto session name set to %s", base_session_name);
+ }
+
+
+ /*
+ * Output handling
+ */
+
+ /*
+ * If any of those options are present clear all output related data.
+ */
+ if (opt_output_path || opt_url || (opt_ctrl_url && opt_data_url) || opt_no_output) {
+ /* Overwrite output */
+ free(base_url);
+ free(base_ctrl_url);
+ free(base_data_url);
+ base_url = NULL;
+ base_ctrl_url = NULL;
+ base_data_url = NULL;
+ }
+
+ if (opt_output_path) {
+
+ traces_path = utils_expand_path(opt_output_path);
+ if (!traces_path) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* Create URL string from the local file system path */
+ printed_bytes = asprintf(&temp_url, "file://%s", traces_path);
+ if (printed_bytes < 0) {
+ PERROR("asprintf url path");
+ ret = CMD_FATAL;
+ goto error;
+ }
+
+ base_url = temp_url;
+ } else if (opt_url) { /* Handling URL (-U opt) */
+ base_url = strdup(opt_url);
+ } else if (opt_data_url && opt_ctrl_url) {
+ /*
+ * With both control and data, we'll be setting the consumer URL
+ * after session creation thus use no URL.
+ */
+ base_ctrl_url = strdup(opt_ctrl_url);
+ base_data_url = strdup(opt_data_url);
+ } else if (!(opt_no_output || base_output_type == OUTPUT_NONE ||
+ base_url || base_ctrl_url || base_data_url)) {
+ /* Generate default output depending on the session type */
+ switch (base_session_type) {
+ case SESSION_NORMAL:
+ /* fallthrough */
+ case SESSION_SNAPSHOT:
+ /* Default to a local path */
+ tmp_home_path = utils_get_home_dir();
+ if (tmp_home_path == NULL) {
+ ERR("HOME path not found.\n \
+ Please specify an output path using -o, --output PATH");
+ ret = CMD_FATAL;
+ goto error;
+ }
+
+ printed_bytes = asprintf(&tmp_url,
+ "file://%s/" DEFAULT_TRACE_DIR_NAME "/%s",
+ tmp_home_path, session_name_date);
+
+ if (printed_bytes < 0) {
+ PERROR("asprintf trace dir name");
+ ret = CMD_FATAL;
+ goto error;
+ }
+
+ base_url = tmp_url ;
+ break;
+ case SESSION_LIVE:
+ /* Default to a net output */
+ printed_bytes = asprintf(&tmp_url, "net://127.0.0.1");
+ if (printed_bytes < 0) {
+ PERROR("asprintf default live URL");
+ ret = CMD_FATAL;
+ goto error;
+ }
+ base_url = tmp_url ;
+ break;
+ default:
+ ERR("Unknown session type");
+ ret = CMD_FATAL;
+ goto error;
+ }
+ }
+
+ /*
+ * Shared memory path handling
+ */
+ if (opt_shm_path) {
+ /* Overwrite shm_path so clear any previously defined one */
+ free(base_shm_path);
+ printed_bytes = asprintf(&base_shm_path, "%s/%s", opt_shm_path, session_name_date);
+ if (printed_bytes < 0) {
+ PERROR("asprintf shm_path");
+ ret = CMD_FATAL;
+ goto error;
+ }
+ }
+
+ /*
+ * Live timer handling
+ */
+ if (opt_live_timer) {
+ base_live_timer = opt_live_timer;
+ }
+
+ /* Get output type from urls */
+ /* TODO: Find a better way of inferring output type */
+ if (base_url) {
+ /* Get lttng uris from single url */
+ uri_array_size = uri_parse_str_urls(base_url, NULL, &uris);
+ if (uri_array_size < 0) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ } else if (base_ctrl_url && base_data_url) {
+ uri_array_size = uri_parse_str_urls(base_ctrl_url, base_data_url, &uris);
+ if (uri_array_size < 0) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ } else {
+ /* --no-output */
+ uri_array_size = 0;
+ }
+
+ switch (uri_array_size) {
+ case 0:
+ base_output_type = OUTPUT_NONE;
+ break;
+ case 1:
+ base_output_type = OUTPUT_LOCAL;
+ break;
+ case 2:
+ base_output_type = OUTPUT_NET;
+ break;
+ default:
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ if (template) {
+ ret = create_session_from_template(template,
+ base_session_name,
+ base_session_type,
+ base_live_timer,
+ base_output_type,
+ base_url,
+ base_ctrl_url,
+ base_data_url,
+ base_shm_path,
+ datetime);
+ } else {
+ ret = create_session_basic(base_session_name,
+ base_session_type,
+ base_live_timer,
+ base_output_type,
+ base_url,
+ base_ctrl_url,
+ base_data_url,
+ base_shm_path,
+ datetime);
+ }
+ if (ret) {
+ goto error;
+ }
+
+ ret = generate_output(base_session_name,
+ base_session_type,
+ base_live_timer,
+ base_output_type,
+ base_url,
+ base_ctrl_url,
+ base_data_url,
+ base_shm_path);
+ if (ret) {
+ goto error;
+ }
+
+ /* Init lttng session config */
+ ret = config_init(base_session_name);
+ if (ret < 0) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = CMD_SUCCESS;
+
+error:
+ /* Session temp stuff */
+ config_document_free(template);
+ free(session_name_date);
+ free(uris);
+ free(traces_path);
+
+ if (ret < 0) {
+ ERR("%s", lttng_strerror(ret));
+ }
+
+ free(base_session_name);
+ free(base_url);
+ free(base_ctrl_url);
+ free(base_data_url);
+ free(base_shm_path);
+ return ret;
+}
+
+/*
+ * spawn_sessiond
+ *
+ * Spawn a session daemon by forking and execv.
+ */
+static int spawn_sessiond(char *pathname)
+{
+ int ret = 0;
+ pid_t pid;
+
+ MSG("Spawning a session daemon");
+ pid = fork();
+ if (pid == 0) {
+ /*
+ * Spawn session daemon in daemon mode.
+ */
+ execlp(pathname, "lttng-sessiond",
+ "--daemonize", NULL);
+ /* execlp only returns if error happened */
+ if (errno == ENOENT) {
+ ERR("No session daemon found. Use --sessiond-path.");
+ } else {
+ PERROR("execlp");
+ }
+ kill(getppid(), SIGTERM); /* wake parent */
+ exit(EXIT_FAILURE);
+ } else if (pid > 0) {
+ /*
+ * In daemon mode (--daemonize), sessiond only exits when
+ * it's ready to accept commands.
+ */
+ for (;;) {
+ int status;
+ pid_t wait_pid_ret = waitpid(pid, &status, 0);
+
+ if (wait_pid_ret < 0) {
+ if (errno == EINTR) {
+ continue;
+ }
+ PERROR("waitpid");
+ ret = -errno;
+ goto end;
+ }
+
+ if (WIFSIGNALED(status)) {
+ ERR("Session daemon was killed by signal %d",
+ WTERMSIG(status));
+ ret = -1;
+ goto end;
+ } else if (WIFEXITED(status)) {
+ DBG("Session daemon terminated normally (exit status: %d)",
+ WEXITSTATUS(status));
+
+ if (WEXITSTATUS(status) != 0) {
+ ERR("Session daemon terminated with an error (exit status: %d)",
+ WEXITSTATUS(status));
+ ret = -1;
+ goto end;
+ }
+ break;
+ }
+ }
+
+ goto end;
+ } else {
+ PERROR("fork");
+ ret = -1;
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+/*
+ * launch_sessiond
+ *
+ * Check if the session daemon is available using
+ * the liblttngctl API for the check. If not, try to
+ * spawn a daemon.
+ */
+static int launch_sessiond(void)
+{
+ int ret;
+ char *pathname = NULL;
+
+ ret = lttng_session_daemon_alive();
+ if (ret) {
+ /* Sessiond is alive, not an error */
+ ret = 0;
+ goto end;
+ }
+
+ /* Try command line option path */
+ pathname = opt_sessiond_path;
+
+ /* Try LTTNG_SESSIOND_PATH env variable */
+ if (pathname == NULL) {
+ pathname = getenv(DEFAULT_SESSIOND_PATH_ENV);
+ }
+
+ /* Try with configured path */
+ if (pathname == NULL) {
+ if (CONFIG_SESSIOND_BIN[0] != '\0') {
+ pathname = CONFIG_SESSIOND_BIN;
+ }
+ }
+
+ /* Try the default path */
+ if (pathname == NULL) {
+ pathname = INSTALL_BIN_PATH "/lttng-sessiond";
+ }
+
+ DBG("Session daemon binary path: %s", pathname);
+
+ /* Check existence and permissions */
+ ret = access(pathname, F_OK | X_OK);
+ if (ret < 0) {
+ ERR("No such file or access denied: %s", pathname);
+ goto end;
+ }
+
+ ret = spawn_sessiond(pathname);
+end:
+ if (ret) {
+ ERR("Problem occurred while launching session daemon (%s)",
+ pathname);
+ }
+ return ret;
+}
+
+/*
+ * The 'create <options>' first level command
+ *
+ * Returns one of the CMD_* result constants.
+ */
+int cmd_create(int argc, const char **argv)
+{
+ int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
+ char *opt_arg = NULL;
+ static poptContext pc;
+
+ pc = poptGetContext(NULL, argc, argv, long_options, 0);
+ poptReadDefaultConfig(pc, 0);
+
+ while ((opt = poptGetNextOpt(pc)) != -1) {
+ switch (opt) {
+ case OPT_HELP:
+ SHOW_HELP();
+ goto end;
+ case OPT_LIST_OPTIONS:
+ list_cmd_options(stdout, long_options);
+ goto end;
+ case OPT_LIVE_TIMER:
+ {
+ unsigned long v;
+
+ errno = 0;
+ opt_arg = poptGetOptArg(pc);
+ if (!opt_arg) {
+ /* Set up default values. */
+ opt_live_timer = (uint32_t) DEFAULT_LTTNG_LIVE_TIMER;
+ DBG("Session live timer interval set to default value %d",
+ opt_live_timer);
+ break;
+ }
+
+ v = strtoul(opt_arg, NULL, 0);
+ if (errno != 0 || !isdigit(opt_arg[0])) {
+ ERR("Wrong value in --live parameter: %s", opt_arg);
+ ret = CMD_ERROR;
+ goto end;
+ }
+ if (v != (uint32_t) v) {
+ ERR("32-bit overflow in --live parameter: %s", opt_arg);
+ ret = CMD_ERROR;
+ goto end;
+ }
+ if (v == 0) {
+ ERR("Live timer interval must be greater than zero");
+ ret = CMD_ERROR;
+ goto end;
+ }
+ opt_live_timer = (uint32_t) v;
+ DBG("Session live timer interval set to %d", opt_live_timer);
+ break;
+ }
+ default:
+ ret = CMD_UNDEFINED;
+ goto end;
+ }
+ }
+
+ if (opt_no_consumer) {
+ MSG("The option --no-consumer is obsolete. Use --no-output now.");
+ ret = CMD_WARNING;
+ goto end;
+ }
+
+ /* Spawn a session daemon if needed */
+ if (!opt_no_sessiond) {
+ ret = launch_sessiond();
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
+
+ /* MI initialization */
+ if (lttng_opt_mi) {
+ writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
+ if (!writer) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ /* Open command element */
+ ret = mi_lttng_writer_command_open(writer,
+ mi_lttng_element_command_create);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Open output element */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_command_output);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
+ opt_session_name = (char*) poptGetArg(pc);
+
+ command_ret = create_session();
+
if (command_ret) {
success = 0;
}
projects / lttng-tools.git / blobdiff