[ltt-dev] [UST PATCH] Allow backward compatibility to ustctl <= 0.11 for some commands

[Jason Wessel]

The rewrite of the ustctl broke all the existing scripts
that make use of ustctl.  This allows the original commands,
examples, and external scripts to continue working properly.

This covers the commands:

--list-markers
--list-trace-events
--alloc-trace
--start-trace
--stop-trace
--create-trace
--destroy-trace
--enable-marker
--disable-marker

Signed-off-by: Jason Wessel <jason.wessel at windriver.com>
---
 ustctl/ustctl.c |   74 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 71 insertions(+), 3 deletions(-)

diff --git a/ustctl/ustctl.c b/ustctl/ustctl.c
index c1bbe8c..5463a1c 100644
--- a/ustctl/ustctl.c
+++ b/ustctl/ustctl.c
@@ -45,8 +45,40 @@ void usage(const char *process_name)
 	list_cli_cmds(CLI_DESCRIPTIVE_LIST);
 }
 
+#define DASH_DASH_COMPAT 1
+#ifdef DASH_DASH_COMPAT
+/*
+ * If DASH_DASH_COMPAT is defined allow the some of the ustctl command
+ * in version <= 0.11 commands to live on a while longer such that
+ * scripts do not immediately have to be changed.
+ */
+enum command {
+	CREATE_TRACE=1000,
+	ALLOC_TRACE,
+	START_TRACE,
+	STOP_TRACE,
+	DESTROY_TRACE,
+	LIST_MARKERS,
+	LIST_TRACE_EVENTS,
+	ENABLE_MARKER,
+	DISABLE_MARKER,
+};
+
+#endif /* DASH_DASH_COMPAT */
+
 struct option options[] =
 {
+#ifdef DASH_DASH_COMPAT
+	{ "create-trace", 0, 0, CREATE_TRACE },
+	{ "alloc-trace", 0, 0, ALLOC_TRACE },
+	{ "start-trace", 0, 0, START_TRACE },
+	{ "stop-trace", 0, 0, STOP_TRACE },
+	{ "destroy-trace", 0, 0, DESTROY_TRACE },
+	{ "list-markers", 0, 0, LIST_MARKERS },
+	{ "list-trace-events", 0, 0, LIST_TRACE_EVENTS},
+	{ "enable-marker", 0, 0, ENABLE_MARKER },
+	{ "disable-marker", 0, 0, DISABLE_MARKER },
+#endif /* DASH_DASH_COMPAT */
 	{"help", 2, NULL, 'h'},
 	{"list", 0, NULL, 'l'},
 	{"extended-list", 0, NULL, 'e'},
@@ -56,6 +88,7 @@ struct option options[] =
 int main(int argc, char *argv[])
 {
 	struct cli_cmd *cli_cmd;
+	char **args = argv;
 	int opt;
 
 	if(argc <= 1) {
@@ -85,20 +118,55 @@ int main(int argc, char *argv[])
 		case 'e':
 			list_cli_cmds(CLI_EXTENDED_LIST);
 			exit(EXIT_FAILURE);
+#ifdef DASH_DASH_COMPAT
+		case LIST_MARKERS:
+		case LIST_TRACE_EVENTS:
+		case CREATE_TRACE:
+		case ALLOC_TRACE:
+		case START_TRACE:
+		case STOP_TRACE:
+		case DESTROY_TRACE:
+		case ENABLE_MARKER:
+		case DISABLE_MARKER:
+		    {
+			int i;
+			args = (char **)malloc(sizeof(char **) * argc + 3);
+			optind--;
+			args[optind] = strdup(&argv[optind][2]);
+			for (i = optind + 1; i < argc; i++) {
+				args[i] = argv[i];
+			}
+			if (opt >= CREATE_TRACE && opt <= DESTROY_TRACE) {
+				args[argc] = strdup("auto");
+				argc++;
+			}
+			if (opt >= ENABLE_MARKER && opt <= DISABLE_MARKER) {
+				args[argc] = args[argc - 2];
+				args[argc - 2] = args[argc - 1];
+				args[argc - 1] = strdup("auto");
+				argc++;
+			}
+			args[argc] = NULL;
+			goto do_cli;
+		    }
+#endif /* DASH_DASH_COMPAT */
 		default:
 			fprintf(stderr, "Unknown option\n");
 			break;
 		}
 	}
 
-	cli_cmd = find_cli_cmd(argv[optind]);
+#ifdef DASH_DASH_COMPAT
+do_cli:
+#endif /* DASH_DASH_COMPAT */
+	cli_cmd = find_cli_cmd(args[optind]);
 	if (!cli_cmd) {
 		fprintf(stderr, "No such command %s\n",
-			argv[optind]);
+			args[optind]);
 		exit(EXIT_FAILURE);
 	}
 
-	cli_dispatch_cmd(cli_cmd, argc - optind, &argv[optind]);
+	cli_dispatch_cmd(cli_cmd, argc - optind, &args[optind]);
 
 	return 0;
 }
-- 
1.6.6.2