X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Flib%2Flttng-ctl%2Flttng-ctl.c;h=921db6f598fb30195398750f9a906e355e36707e;hp=bff522201233db0a5e6551e160becfb78a0e1260;hb=347c5ab5500e49fcd356a7e000f44ebce633e1d4;hpb=ecc48a904cc7c419fd1400afaa9ccb93be490cdd

diff --git a/src/lib/lttng-ctl/lttng-ctl.c b/src/lib/lttng-ctl/lttng-ctl.c
index bff522201..921db6f59 100644
--- a/src/lib/lttng-ctl/lttng-ctl.c
+++ b/src/lib/lttng-ctl/lttng-ctl.c
@@ -34,6 +34,7 @@
 #include <common/uri.h>
 #include <common/utils.h>
 #include <lttng/lttng.h>
+#include <lttng/health-internal.h>
 
 #include "filter/filter-ast.h"
 #include "filter/filter-parser.h"
@@ -59,7 +60,6 @@ do {								\
 /* Socket to session daemon for communication */
 static int sessiond_socket;
 static char sessiond_sock_path[PATH_MAX];
-static char health_sock_path[PATH_MAX];
 
 /* Variables */
 static char *tracing_group;
@@ -103,6 +103,7 @@ void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst,
 		switch (src->type) {
 		case LTTNG_DOMAIN_KERNEL:
 		case LTTNG_DOMAIN_UST:
+		case LTTNG_DOMAIN_JUL:
 			memcpy(dst, src, sizeof(struct lttng_domain));
 			break;
 		default:
@@ -197,12 +198,14 @@ end:
  *
  *  If yes return 1, else return -1.
  */
-static int check_tracing_group(const char *grp_name)
+LTTNG_HIDDEN
+int lttng_check_tracing_group(void)
 {
 	struct group *grp_tracing;	/* no free(). See getgrnam(3) */
 	gid_t *grp_list;
 	int grp_list_size, grp_id, i;
 	int ret = -1;
+	const char *grp_name = tracing_group;
 
 	/* Get GID of group 'tracing' */
 	grp_tracing = getgrnam(grp_name);
@@ -293,7 +296,7 @@ static int set_session_daemon_path(void)
 
 	if (uid != 0) {
 		/* Are we in the tracing group ? */
-		in_tgroup = check_tracing_group(tracing_group);
+		in_tgroup = lttng_check_tracing_group();
 	}
 
 	if ((uid == 0) || in_tgroup) {
@@ -517,6 +520,7 @@ int lttng_register_consumer(struct lttng_handle *handle,
 		return -LTTNG_ERR_INVALID;
 	}
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_REGISTER_CONSUMER;
 	lttng_ctl_copy_string(lsm.session.name, handle->session_name,
 			sizeof(lsm.session.name));
@@ -539,6 +543,7 @@ int lttng_start_tracing(const char *session_name)
 		return -LTTNG_ERR_INVALID;
 	}
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_START_TRACE;
 
 	lttng_ctl_copy_string(lsm.session.name, session_name,
@@ -559,6 +564,7 @@ static int _lttng_stop_tracing(const char *session_name, int wait)
 		return -LTTNG_ERR_INVALID;
 	}
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_STOP_TRACE;
 
 	lttng_ctl_copy_string(lsm.session.name, session_name,
@@ -573,9 +579,6 @@ static int _lttng_stop_tracing(const char *session_name, int wait)
 		goto end;
 	}
 
-	_MSG("Waiting for data availability");
-	fflush(stdout);
-
 	/* Check for data availability */
 	do {
 		data_ret = lttng_data_pending(session_name);
@@ -591,13 +594,9 @@ static int _lttng_stop_tracing(const char *session_name, int wait)
 		 */
 		if (data_ret) {
 			usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME);
-			_MSG(".");
-			fflush(stdout);
 		}
 	} while (data_ret != 0);
 
-	MSG("");
-
 end:
 error:
 	return ret;
@@ -670,36 +669,8 @@ int lttng_add_context(struct lttng_handle *handle,
 int lttng_enable_event(struct lttng_handle *handle,
 		struct lttng_event *ev, const char *channel_name)
 {
-	struct lttcomm_session_msg lsm;
-
-	if (handle == NULL || ev == NULL) {
-		return -LTTNG_ERR_INVALID;
-	}
-
-	memset(&lsm, 0, sizeof(lsm));
-
-	/* If no channel name, send empty string. */
-	if (channel_name == NULL) {
-		lttng_ctl_copy_string(lsm.u.enable.channel_name, "",
-				sizeof(lsm.u.enable.channel_name));
-	} else {
-		lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name,
-				sizeof(lsm.u.enable.channel_name));
-	}
-
-	lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
-
-	if (ev->name[0] != '\0') {
-		lsm.cmd_type = LTTNG_ENABLE_EVENT;
-	} else {
-		lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT;
-	}
-	memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event));
-
-	lttng_ctl_copy_string(lsm.session.name, handle->session_name,
-			sizeof(lsm.session.name));
-
-	return lttng_ctl_ask_sessiond(&lsm, NULL);
+	return lttng_enable_event_with_exclusions(handle, ev, channel_name,
+			NULL, 0, NULL);
 }
 
 /*
@@ -712,101 +683,99 @@ int lttng_enable_event_with_filter(struct lttng_handle *handle,
 		struct lttng_event *event, const char *channel_name,
 		const char *filter_expression)
 {
-	struct lttcomm_session_msg lsm;
-	struct filter_parser_ctx *ctx;
-	FILE *fmem;
-	int ret = 0;
+	return lttng_enable_event_with_exclusions(handle, event, channel_name,
+			filter_expression, 0, NULL);
+}
 
-	if (!filter_expression) {
-		/*
-		 * Fall back to normal event enabling if no filter
-		 * specified.
-		 */
-		return lttng_enable_event(handle, event, channel_name);
-	}
+/*
+ * Depending on the event, return a newly allocated JUL filter expression or
+ * NULL if not applicable.
+ *
+ * An event with NO loglevel and the name is * will return NULL.
+ */
+static char *set_jul_filter(const char *filter, struct lttng_event *ev)
+{
+	int err;
+	char *jul_filter = NULL;
 
-	/*
-	 * Empty filter string will always be rejected by the parser
-	 * anyway, so treat this corner-case early to eliminate
-	 * lttng_fmemopen error for 0-byte allocation.
-	 */
-	if (handle == NULL || filter_expression[0] == '\0') {
-		return -LTTNG_ERR_INVALID;
-	}
+	assert(ev);
 
-	/*
-	 * casting const to non-const, as the underlying function will
-	 * use it in read-only mode.
-	 */
-	fmem = lttng_fmemopen((void *) filter_expression,
-			strlen(filter_expression), "r");
-	if (!fmem) {
-		fprintf(stderr, "Error opening memory as stream\n");
-		return -LTTNG_ERR_FILTER_NOMEM;
-	}
-	ctx = filter_parser_ctx_alloc(fmem);
-	if (!ctx) {
-		fprintf(stderr, "Error allocating parser\n");
-		ret = -LTTNG_ERR_FILTER_NOMEM;
-		goto alloc_error;
-	}
-	ret = filter_parser_ctx_append_ast(ctx);
-	if (ret) {
-		fprintf(stderr, "Parse error\n");
-		ret = -LTTNG_ERR_FILTER_INVAL;
-		goto parse_error;
-	}
-	ret = filter_visitor_set_parent(ctx);
-	if (ret) {
-		fprintf(stderr, "Set parent error\n");
-		ret = -LTTNG_ERR_FILTER_INVAL;
-		goto parse_error;
-	}
-	if (print_xml) {
-		ret = filter_visitor_print_xml(ctx, stdout, 0);
-		if (ret) {
-			fflush(stdout);
-			fprintf(stderr, "XML print error\n");
-			ret = -LTTNG_ERR_FILTER_INVAL;
-			goto parse_error;
+	/* Don't add filter for the '*' event. */
+	if (ev->name[0] != '*') {
+		if (filter) {
+			err = asprintf(&jul_filter, "%s && logger_name == \"%s\"", filter,
+					ev->name);
+		} else {
+			err = asprintf(&jul_filter, "logger_name == \"%s\"", ev->name);
+		}
+		if (err < 0) {
+			PERROR("asprintf");
+			goto end;
 		}
 	}
 
-	dbg_printf("Generating IR... ");
-	fflush(stdout);
-	ret = filter_visitor_ir_generate(ctx);
-	if (ret) {
-		fprintf(stderr, "Generate IR error\n");
-		ret = -LTTNG_ERR_FILTER_INVAL;
-		goto parse_error;
+	/* Add loglevel filtering if any for the JUL domain. */
+	if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) {
+		char *op;
+
+		if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) {
+			op = ">=";
+		} else {
+			op = "==";
+		}
+
+		if (filter) {
+			err = asprintf(&jul_filter, "%s && int_loglevel %s %d", filter, op,
+					ev->loglevel);
+		} else {
+			err = asprintf(&jul_filter, "int_loglevel %s %d", op,
+					ev->loglevel);
+		}
+		if (err < 0) {
+			PERROR("asprintf");
+			free(jul_filter);
+			jul_filter = NULL;
+			goto end;
+		}
 	}
-	dbg_printf("done\n");
 
-	dbg_printf("Validating IR... ");
-	fflush(stdout);
-	ret = filter_visitor_ir_check_binary_op_nesting(ctx);
-	if (ret) {
-		ret = -LTTNG_ERR_FILTER_INVAL;
-		goto parse_error;
+end:
+	return jul_filter;
+}
+
+/*
+ * Enable event(s) for a channel, possibly with exclusions and a filter.
+ * If no event name is specified, all events are enabled.
+ * If no channel name is specified, the default name is used.
+ * If filter expression is not NULL, the filter is set for the event.
+ * If exclusion count is not zero, the exclusions are set for the event.
+ * Returns size of returned session payload data or a negative error code.
+ */
+int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
+		struct lttng_event *ev, const char *channel_name,
+		const char *filter_expression,
+		int exclusion_count, char **exclusion_list)
+{
+	struct lttcomm_session_msg lsm;
+	char *varlen_data, *jul_filter = NULL;
+	int ret = 0;
+	struct filter_parser_ctx *ctx = NULL;
+	FILE *fmem = NULL;
+
+	if (handle == NULL || ev == NULL) {
+		return -LTTNG_ERR_INVALID;
 	}
-	dbg_printf("done\n");
 
-	dbg_printf("Generating bytecode... ");
-	fflush(stdout);
-	ret = filter_visitor_bytecode_generate(ctx);
-	if (ret) {
-		fprintf(stderr, "Generate bytecode error\n");
-		ret = -LTTNG_ERR_FILTER_INVAL;
-		goto parse_error;
+	/* Empty filter string will always be rejected by the parser
+	 * anyway, so treat this corner-case early to eliminate
+	 * lttng_fmemopen error for 0-byte allocation.
+	 */
+	if (filter_expression && filter_expression[0] == '\0') {
+		return -LTTNG_ERR_INVALID;
 	}
-	dbg_printf("done\n");
-	dbg_printf("Size of bytecode generated: %u bytes.\n",
-		bytecode_get_len(&ctx->bytecode->b));
 
 	memset(&lsm, 0, sizeof(lsm));
 
-	lsm.cmd_type = LTTNG_ENABLE_EVENT_WITH_FILTER;
-
 	/* If no channel name, send empty string. */
 	if (channel_name == NULL) {
 		lttng_ctl_copy_string(lsm.u.enable.channel_name, "",
@@ -816,38 +785,180 @@ int lttng_enable_event_with_filter(struct lttng_handle *handle,
 				sizeof(lsm.u.enable.channel_name));
 	}
 
-	/* Copy event name */
-	if (event) {
-		memcpy(&lsm.u.enable.event, event, sizeof(lsm.u.enable.event));
+	if (ev->name[0] != '\0') {
+		lsm.cmd_type = LTTNG_ENABLE_EVENT;
+	} else {
+		lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT;
 	}
 
-	lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b)
-			+ bytecode_get_len(&ctx->bytecode->b);
-
 	lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
+	memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event));
 
 	lttng_ctl_copy_string(lsm.session.name, handle->session_name,
 			sizeof(lsm.session.name));
+	lsm.u.enable.exclusion_count = exclusion_count;
+	lsm.u.enable.bytecode_len = 0;
 
-	ret = lttng_ctl_ask_sessiond_varlen(&lsm, &ctx->bytecode->b,
-				lsm.u.enable.bytecode_len, NULL);
+	/*
+	 * For the JUL domain, a filter is enforced except for the enable all
+	 * event. This is done to avoid having the event in all sessions thus
+	 * filtering by logger name.
+	 */
+	if (exclusion_count == 0 && filter_expression == NULL &&
+			handle->domain.type != LTTNG_DOMAIN_JUL) {
+		goto ask_sessiond;
+	}
 
-	filter_bytecode_free(ctx);
-	filter_ir_free(ctx);
-	filter_parser_ctx_free(ctx);
-	if (fclose(fmem) != 0) {
-		perror("fclose");
+	/*
+	 * We have either a filter or some exclusions, so we need to set up
+	 * a variable-length memory block from where to send the data
+	 */
+
+	/* Parse filter expression */
+	if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL) {
+		if (handle->domain.type == LTTNG_DOMAIN_JUL) {
+			/* Setup JUL filter if needed. */
+			filter_expression = set_jul_filter(filter_expression, ev);
+			if (!filter_expression) {
+				goto ask_sessiond;
+			}
+		}
+
+		/*
+		 * casting const to non-const, as the underlying function will
+		 * use it in read-only mode.
+		 */
+		fmem = lttng_fmemopen((void *) filter_expression,
+				strlen(filter_expression), "r");
+		if (!fmem) {
+			fprintf(stderr, "Error opening memory as stream\n");
+			free(jul_filter);
+			return -LTTNG_ERR_FILTER_NOMEM;
+		}
+		ctx = filter_parser_ctx_alloc(fmem);
+		if (!ctx) {
+			fprintf(stderr, "Error allocating parser\n");
+			ret = -LTTNG_ERR_FILTER_NOMEM;
+			goto filter_alloc_error;
+		}
+		ret = filter_parser_ctx_append_ast(ctx);
+		if (ret) {
+			fprintf(stderr, "Parse error\n");
+			ret = -LTTNG_ERR_FILTER_INVAL;
+			goto parse_error;
+		}
+		ret = filter_visitor_set_parent(ctx);
+		if (ret) {
+			fprintf(stderr, "Set parent error\n");
+			ret = -LTTNG_ERR_FILTER_INVAL;
+			goto parse_error;
+		}
+		if (print_xml) {
+			ret = filter_visitor_print_xml(ctx, stdout, 0);
+			if (ret) {
+				fflush(stdout);
+				fprintf(stderr, "XML print error\n");
+				ret = -LTTNG_ERR_FILTER_INVAL;
+				goto parse_error;
+			}
+		}
+
+		dbg_printf("Generating IR... ");
+		fflush(stdout);
+		ret = filter_visitor_ir_generate(ctx);
+		if (ret) {
+			fprintf(stderr, "Generate IR error\n");
+			ret = -LTTNG_ERR_FILTER_INVAL;
+			goto parse_error;
+		}
+		dbg_printf("done\n");
+
+		dbg_printf("Validating IR... ");
+		fflush(stdout);
+		ret = filter_visitor_ir_check_binary_op_nesting(ctx);
+		if (ret) {
+			ret = -LTTNG_ERR_FILTER_INVAL;
+			goto parse_error;
+		}
+		dbg_printf("done\n");
+
+		dbg_printf("Generating bytecode... ");
+		fflush(stdout);
+		ret = filter_visitor_bytecode_generate(ctx);
+		if (ret) {
+			fprintf(stderr, "Generate bytecode error\n");
+			ret = -LTTNG_ERR_FILTER_INVAL;
+			goto parse_error;
+		}
+		dbg_printf("done\n");
+		dbg_printf("Size of bytecode generated: %u bytes.\n",
+			bytecode_get_len(&ctx->bytecode->b));
+
+		lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b)
+				+ bytecode_get_len(&ctx->bytecode->b);
+		lsm.u.enable.expression_len = strlen(filter_expression) + 1;
+	}
+
+	varlen_data = zmalloc(lsm.u.enable.bytecode_len
+			      + lsm.u.enable.expression_len
+			      + LTTNG_SYMBOL_NAME_LEN * exclusion_count);
+	if (!varlen_data) {
+		ret = -LTTNG_ERR_EXCLUSION_NOMEM;
+		goto varlen_alloc_error;
+	}
+	/* Put exclusion names first in the data */
+	while (exclusion_count--) {
+		strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count,
+			*(exclusion_list + exclusion_count),
+			LTTNG_SYMBOL_NAME_LEN);
+	}
+	/* Add filter expression next */
+	if (lsm.u.enable.expression_len != 0) {
+		memcpy(varlen_data
+			+ LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count,
+			filter_expression,
+			lsm.u.enable.expression_len);
+	}
+	/* Add filter bytecode next */
+	if (lsm.u.enable.bytecode_len != 0) {
+		memcpy(varlen_data
+			+ LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count
+			+ lsm.u.enable.expression_len,
+			&ctx->bytecode->b,
+			lsm.u.enable.bytecode_len);
+	}
+
+	ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data,
+			(LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) +
+			lsm.u.enable.bytecode_len + lsm.u.enable.expression_len,
+			NULL);
+	free(varlen_data);
+
+varlen_alloc_error:
+	if (filter_expression) {
+		filter_bytecode_free(ctx);
+		filter_ir_free(ctx);
+		filter_parser_ctx_free(ctx);
+		if (fclose(fmem) != 0) {
+			perror("fclose");
+		}
 	}
+	free(jul_filter);
 	return ret;
 
 parse_error:
 	filter_bytecode_free(ctx);
 	filter_ir_free(ctx);
 	filter_parser_ctx_free(ctx);
-alloc_error:
+filter_alloc_error:
 	if (fclose(fmem) != 0) {
 		perror("fclose");
 	}
+	free(jul_filter);
+	return ret;
+
+ask_sessiond:
+	ret = lttng_ctl_ask_sessiond(&lsm, NULL);
 	return ret;
 }
 
@@ -967,6 +1078,7 @@ int lttng_list_tracepoints(struct lttng_handle *handle,
 		return -LTTNG_ERR_INVALID;
 	}
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_LIST_TRACEPOINTS;
 	lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
@@ -994,6 +1106,7 @@ int lttng_list_tracepoint_fields(struct lttng_handle *handle,
 		return -LTTNG_ERR_INVALID;
 	}
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS;
 	lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
@@ -1062,6 +1175,7 @@ int lttng_destroy_session(const char *session_name)
 		return -LTTNG_ERR_INVALID;
 	}
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_DESTROY_SESSION;
 
 	lttng_ctl_copy_string(lsm.session.name, session_name,
@@ -1081,6 +1195,7 @@ int lttng_list_sessions(struct lttng_session **sessions)
 	int ret;
 	struct lttcomm_session_msg lsm;
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_LIST_SESSIONS;
 	ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions);
 	if (ret < 0) {
@@ -1106,6 +1221,7 @@ int lttng_list_domains(const char *session_name,
 		return -LTTNG_ERR_INVALID;
 	}
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_LIST_DOMAINS;
 
 	lttng_ctl_copy_string(lsm.session.name, session_name,
@@ -1135,6 +1251,7 @@ int lttng_list_channels(struct lttng_handle *handle,
 		return -LTTNG_ERR_INVALID;
 	}
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_LIST_CHANNELS;
 	lttng_ctl_copy_string(lsm.session.name, handle->session_name,
 			sizeof(lsm.session.name));
@@ -1166,6 +1283,7 @@ int lttng_list_events(struct lttng_handle *handle,
 		return -LTTNG_ERR_INVALID;
 	}
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_LIST_EVENTS;
 	lttng_ctl_copy_string(lsm.session.name, handle->session_name,
 			sizeof(lsm.session.name));
@@ -1213,6 +1331,7 @@ int lttng_calibrate(struct lttng_handle *handle,
 		return -LTTNG_ERR_INVALID;
 	}
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_CALIBRATE;
 	lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
@@ -1361,104 +1480,6 @@ int lttng_disable_consumer(struct lttng_handle *handle)
 	return -ENOSYS;
 }
 
-/*
- * Set health socket path by putting it in the global health_sock_path
- * variable.
- *
- * Returns 0 on success or assert(0) on ENOMEM.
- */
-static int set_health_socket_path(void)
-{
-	int in_tgroup = 0;	/* In tracing group */
-	uid_t uid;
-	const char *home;
-
-	uid = getuid();
-
-	if (uid != 0) {
-		/* Are we in the tracing group ? */
-		in_tgroup = check_tracing_group(tracing_group);
-	}
-
-	if ((uid == 0) || in_tgroup) {
-		lttng_ctl_copy_string(health_sock_path,
-				DEFAULT_GLOBAL_HEALTH_UNIX_SOCK, sizeof(health_sock_path));
-	}
-
-	if (uid != 0) {
-		int ret;
-
-		/*
-		 * With GNU C <  2.1, snprintf returns -1 if the target buffer is too small;
-		 * With GNU C >= 2.1, snprintf returns the required size (excluding closing null)
-		 */
-		home = utils_get_home_dir();
-		if (home == NULL) {
-			/* Fallback in /tmp .. */
-			home = "/tmp";
-		}
-
-		ret = snprintf(health_sock_path, sizeof(health_sock_path),
-				DEFAULT_HOME_HEALTH_UNIX_SOCK, home);
-		if ((ret < 0) || (ret >= sizeof(health_sock_path))) {
-			/* ENOMEM at this point... just kill the control lib. */
-			assert(0);
-		}
-	}
-
-	return 0;
-}
-
-/*
- * Check session daemon health for a specific health component.
- *
- * Return 0 if health is OK or else 1 if BAD.
- *
- * Any other negative value is a lttng error code which can be translated with
- * lttng_strerror().
- */
-int lttng_health_check(enum lttng_health_component c)
-{
-	int sock, ret;
-	struct lttcomm_health_msg msg;
-	struct lttcomm_health_data reply;
-
-	/* Connect to the sesssion daemon */
-	sock = lttcomm_connect_unix_sock(health_sock_path);
-	if (sock < 0) {
-		ret = -LTTNG_ERR_NO_SESSIOND;
-		goto error;
-	}
-
-	msg.cmd = LTTNG_HEALTH_CHECK;
-	msg.component = c;
-
-	ret = lttcomm_send_unix_sock(sock, (void *)&msg, sizeof(msg));
-	if (ret < 0) {
-		ret = -LTTNG_ERR_FATAL;
-		goto close_error;
-	}
-
-	ret = lttcomm_recv_unix_sock(sock, (void *)&reply, sizeof(reply));
-	if (ret < 0) {
-		ret = -LTTNG_ERR_FATAL;
-		goto close_error;
-	}
-
-	ret = reply.ret_code;
-
-close_error:
-	{
-		int closeret;
-
-		closeret = close(sock);
-		assert(!closeret);
-	}
-
-error:
-	return ret;
-}
-
 /*
  * This is an extension of create session that is ONLY and SHOULD only be used
  * by the lttng command line program. It exists to avoid using URI parsing in
@@ -1541,6 +1562,7 @@ int lttng_data_pending(const char *session_name)
 		return -LTTNG_ERR_INVALID;
 	}
 
+	memset(&lsm, 0, sizeof(lsm));
 	lsm.cmd_type = LTTNG_DATA_PENDING;
 
 	lttng_ctl_copy_string(lsm.session.name, session_name,
@@ -1618,16 +1640,20 @@ int lttng_create_session_live(const char *name, const char *url,
 	lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE;
 	lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
 
-	size = uri_parse_str_urls(url, NULL, &uris);
-	if (size < 0) {
-		ret = -LTTNG_ERR_INVALID;
-		goto end;
-	}
+	if (url) {
+		size = uri_parse_str_urls(url, NULL, &uris);
+		if (size <= 0) {
+			ret = -LTTNG_ERR_INVALID;
+			goto end;
+		}
 
-	/* file:// is not accepted for live session. */
-	if (uris[0].dtype == LTTNG_DST_PATH) {
-		ret = -LTTNG_ERR_INVALID;
-		goto end;
+		/* file:// is not accepted for live session. */
+		if (uris[0].dtype == LTTNG_DST_PATH) {
+			ret = -LTTNG_ERR_INVALID;
+			goto end;
+		}
+	} else {
+		size = 0;
 	}
 
 	lsm.u.session_live.nb_uri = size;
@@ -1648,8 +1674,6 @@ static void __attribute__((constructor)) init()
 {
 	/* Set default session group */
 	lttng_set_tracing_group(DEFAULT_TRACING_GROUP);
-	/* Set socket for health check */
-	(void) set_health_socket_path();
 }
 
 /*