X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng%2Flttng.c;h=aaee5a25d243d4c828d4f82434cd508a8a0e80d0;hp=d905af9a683a6ad57c14acbd0f41687aefa30bb0;hb=77927271f4b396ec3cb9e8e380c26d19e3589558;hpb=259c267446a63c501298f39a5d2397314b11f729

diff --git a/src/bin/lttng/lttng.c b/src/bin/lttng/lttng.c
index d905af9a6..aaee5a25d 100644
--- a/src/bin/lttng/lttng.c
+++ b/src/bin/lttng/lttng.c
@@ -32,6 +32,7 @@
 #include <common/utils.h>
 
 #include "command.h"
+#include "version.h"
 
 static const char *help_msg =
 #ifdef LTTNG_EMBED_HELP
@@ -252,6 +253,23 @@ end:
 	return ret;
 }
 
+static bool command_exists(const char *command)
+{
+	const struct cmd_struct *cmd = commands;
+	bool exists = false;
+
+	while (cmd->name != NULL) {
+		if (!strcmp(command, cmd->name)) {
+			exists = true;
+			goto end;
+		}
+		cmd++;
+	}
+
+end:
+	return exists;
+}
+
 static void show_basic_help(void)
 {
 	puts("Usage: lttng [--group=GROUP] [--mi=TYPE] [--no-sessiond | --sessiond-path=PATH]");
@@ -285,6 +303,11 @@ static void show_basic_help(void)
 	puts("  start             " CONFIG_CMD_DESCR_START);
 	puts("  stop              " CONFIG_CMD_DESCR_STOP);
 	puts("");
+	puts("Tracing session rotation:");
+	puts("  disable-rotation  " CONFIG_CMD_DESCR_DISABLE_ROTATION);
+	puts("  enable-rotation   " CONFIG_CMD_DESCR_ENABLE_ROTATION);
+	puts("  rotate            " CONFIG_CMD_DESCR_ROTATE);
+	puts("");
 	puts("Resource tracking:");
 	puts("  track             " CONFIG_CMD_DESCR_TRACK);
 	puts("  untrack           " CONFIG_CMD_DESCR_UNTRACK);
@@ -402,19 +425,19 @@ static int parse_args(int argc, char **argv)
 	ret = handle_command(argc - optind, argv + optind);
 	switch (ret) {
 	case CMD_WARNING:
-		WARN("Some command(s) went wrong");
-		break;
 	case CMD_ERROR:
-		ERR("Command error");
 		break;
 	case CMD_UNDEFINED:
-		ERR("Undefined command or invalid arguments");
+		if (!command_exists(*(argv + optind))) {
+			MSG("lttng: %s is not an lttng command. See 'lttng --help'.",
+					*(argv + optind));
+		} else {
+			ERR("Unrecognized argument used with \'%s\' command",
+					*(argv + optind));
+		}
 		break;
 	case CMD_FATAL:
-		ERR("Fatal error");
-		break;
 	case CMD_UNSUPPORTED:
-		ERR("Unsupported command");
 		break;
 	case -1:
 		ret = 1;