Add a '--list-options' option to each command.

[lttng-tools.git] / src / bin / lttng / commands / enable_events.c

diff --git a/src/bin/lttng/commands/enable_events.c b/src/bin/lttng/commands/enable_events.c
index 8360821fb09221304b386f3dc45fac19a7107c59..41a25730cdc4f5495d534fce5d21214ee46d9305 100644 (file)
--- a/src/bin/lttng/commands/enable_events.c
+++ b/src/bin/lttng/commands/enable_events.c
@@ -54,6 +54,7 @@ enum {
        OPT_SYSCALL,
        OPT_USERSPACE,
        OPT_TRACEPOINT_LOGLEVEL,
+       OPT_LIST_OPTIONS,
 };
 
 static struct lttng_handle *handle;
@@ -84,6 +85,7 @@ static struct poptOption long_options[] = {
 #endif
        {"syscall",        0,   POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
        {"loglevel",     0,     POPT_ARG_NONE, 0, OPT_TRACEPOINT_LOGLEVEL, 0, 0},
+       {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
        {0, 0, 0, 0, 0, 0, 0}
 };
 
@@ -95,6 +97,7 @@ static void usage(FILE *ofp)
        fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
        fprintf(ofp, "\n");
        fprintf(ofp, "  -h, --help               Show this help\n");
+       fprintf(ofp, "      --list-options       Simple listing of options\n");
        fprintf(ofp, "  -s, --session            Apply on session name\n");
        fprintf(ofp, "  -c, --channel            Apply on this channel\n");
        fprintf(ofp, "  -a, --all                Enable all tracepoints\n");
@@ -232,7 +235,7 @@ static int enable_events(char *session_name)
                dom.type = LTTNG_DOMAIN_UST;
        } else {
                ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
-               ret = CMD_NOT_IMPLEMENTED;
+               ret = CMD_UNDEFINED;
                goto error;
        }
 
@@ -327,14 +330,14 @@ static int enable_events(char *session_name)
                                MSG("per-syscall selection not supported yet. Use \"-a\" "
                                                "for all syscalls.");
                        default:
-                               ret = CMD_NOT_IMPLEMENTED;
+                               ret = CMD_UNDEFINED;
                                goto error;
                        }
                } else if (opt_userspace) {             /* User-space tracer action */
 #if 0
                        if (opt_cmd_name != NULL || opt_pid) {
                                MSG("Only supporting tracing all UST processes (-u) for now.");
-                               ret = CMD_NOT_IMPLEMENTED;
+                               ret = CMD_UNDEFINED;
                                goto error;
                        }
 #endif
@@ -362,7 +365,7 @@ static int enable_events(char *session_name)
                        case LTTNG_EVENT_FUNCTION_ENTRY:
                        case LTTNG_EVENT_SYSCALL:
                        default:
-                               ret = CMD_NOT_IMPLEMENTED;
+                               ret = CMD_UNDEFINED;
                                goto error;
                        }
                } else {
@@ -432,6 +435,10 @@ int cmd_enable_events(int argc, const char **argv)
                case OPT_TRACEPOINT_LOGLEVEL:
                        opt_event_type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
                        break;
+               case OPT_LIST_OPTIONS:
+                       list_cmd_options(stdout, long_options);
+                       ret = CMD_SUCCESS;
+                       goto end;
                default:
                        usage(stderr);
                        ret = CMD_UNDEFINED;