X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fmain.c;h=726c4e388c7a01669b068bc30d7de4f647a26549;hb=cafc2c60ea4893d837fe0e9cb0bbe92c02b8cc46;hp=3d0a65def51a0a727c3a5d08539c035f341701f5;hpb=59ee5091eaa9ad62a76a4ec3641993da98172ed9;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index 3d0a65def..726c4e388 100644
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -1270,6 +1270,7 @@ restart:
 	if (!cmd_socket_wrapper) {
 		goto error;
 	}
+	cmd_socket_wrapper->lock = &consumer_data->lock;
 
 	ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper,
 			consumer_data->channel_monitor_pipe);
@@ -1445,7 +1446,17 @@ error_poll:
 }
 
 /*
- * This thread manage application communication.
+ * This thread receives application command sockets (FDs) on the
+ * apps_cmd_pipe and waits (polls) on them until they are closed
+ * or an error occurs.
+ *
+ * At that point, it flushes the data (tracing and metadata) associated
+ * with this application and tears down ust app sessions and other
+ * associated data structures through ust_app_unregister().
+ *
+ * Note that this thread never sends commands to the applications
+ * through the command sockets; it merely listens for hang-ups
+ * and errors on those sockets and cleans-up as they occur.
  */
 static void *thread_manage_apps(void *data)
 {
@@ -2440,33 +2451,30 @@ static pid_t spawn_consumerd(struct consumer_data *consumer_data)
 			break;
 		case LTTNG_CONSUMER64_UST:
 		{
-			char *tmpnew = NULL;
-
-			if (config.consumerd64_lib_dir.value[0] != '\0') {
+			if (config.consumerd64_lib_dir.value) {
 				char *tmp;
 				size_t tmplen;
+				char *tmpnew;
 
 				tmp = lttng_secure_getenv("LD_LIBRARY_PATH");
 				if (!tmp) {
 					tmp = "";
 				}
-				tmplen = strlen("LD_LIBRARY_PATH=")
-					+ strlen(config.consumerd64_lib_dir.value) + 1 /* : */ + strlen(tmp);
+				tmplen = strlen(config.consumerd64_lib_dir.value) + 1 /* : */ + strlen(tmp);
 				tmpnew = zmalloc(tmplen + 1 /* \0 */);
 				if (!tmpnew) {
 					ret = -ENOMEM;
 					goto error;
 				}
-				strcpy(tmpnew, "LD_LIBRARY_PATH=");
 				strcat(tmpnew, config.consumerd64_lib_dir.value);
 				if (tmp[0] != '\0') {
 					strcat(tmpnew, ":");
 					strcat(tmpnew, tmp);
 				}
-				ret = putenv(tmpnew);
+				ret = setenv("LD_LIBRARY_PATH", tmpnew, 1);
+				free(tmpnew);
 				if (ret) {
 					ret = -errno;
-					free(tmpnew);
 					goto error;
 				}
 			}
@@ -2476,40 +2484,34 @@ static pid_t spawn_consumerd(struct consumer_data *consumer_data)
 					"--consumerd-err-sock", consumer_data->err_unix_sock_path,
 					"--group", config.tracing_group_name.value,
 					NULL);
-			if (config.consumerd64_lib_dir.value[0] != '\0') {
-				free(tmpnew);
-			}
 			break;
 		}
 		case LTTNG_CONSUMER32_UST:
 		{
-			char *tmpnew = NULL;
-
-			if (config.consumerd32_lib_dir.value[0] != '\0') {
+			if (config.consumerd32_lib_dir.value) {
 				char *tmp;
 				size_t tmplen;
+				char *tmpnew;
 
 				tmp = lttng_secure_getenv("LD_LIBRARY_PATH");
 				if (!tmp) {
 					tmp = "";
 				}
-				tmplen = strlen("LD_LIBRARY_PATH=")
-					+ strlen(config.consumerd32_lib_dir.value) + 1 /* : */ + strlen(tmp);
+				tmplen = strlen(config.consumerd32_lib_dir.value) + 1 /* : */ + strlen(tmp);
 				tmpnew = zmalloc(tmplen + 1 /* \0 */);
 				if (!tmpnew) {
 					ret = -ENOMEM;
 					goto error;
 				}
-				strcpy(tmpnew, "LD_LIBRARY_PATH=");
 				strcat(tmpnew, config.consumerd32_lib_dir.value);
 				if (tmp[0] != '\0') {
 					strcat(tmpnew, ":");
 					strcat(tmpnew, tmp);
 				}
-				ret = putenv(tmpnew);
+				ret = setenv("LD_LIBRARY_PATH", tmpnew, 1);
+				free(tmpnew);
 				if (ret) {
 					ret = -errno;
-					free(tmpnew);
 					goto error;
 				}
 			}
@@ -2519,14 +2521,11 @@ static pid_t spawn_consumerd(struct consumer_data *consumer_data)
 					"--consumerd-err-sock", consumer_data->err_unix_sock_path,
 					"--group", config.tracing_group_name.value,
 					NULL);
-			if (config.consumerd32_lib_dir.value[0] != '\0') {
-				free(tmpnew);
-			}
 			break;
 		}
 		default:
-			PERROR("unknown consumer type");
-			exit(EXIT_FAILURE);
+			ERR("unknown consumer type");
+			errno = 0;
 		}
 		if (errno != 0) {
 			PERROR("Consumer execl()");