fprintf(ofp, "\n");
fprintf(ofp, " -h, --help Show this help\n");
fprintf(ofp, " --list-options Simple listing of options\n");
- fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
+ fprintf(ofp, " -k, --kernel Apply to the kernel tracer\n");
#if 0
- fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
- fprintf(ofp, " If no CMD, the domain used is UST global\n");
- fprintf(ofp, " or else the domain is UST EXEC_NAME\n");
+ fprintf(ofp, " -u, --userspace [CMD] Apply to the user-space tracer (domain: UST\n");
+ fprintf(ofp, " EXEC_NAME). If no CMD, the domain is UST global.\n";
+ fprintf(ofp, " (-k preempts -u)\n");
fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
#else
- fprintf(ofp, " -u, --userspace Apply for the user-space tracer\n");
+ fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
#endif
fprintf(ofp, "\n");
fprintf(ofp, "Calibrate options:\n");
}
/*
- * calibrate_lttng
+ * Calibrate LTTng.
*
- * Calibrate LTTng.
+ * Returns a CMD_* error.
*/
static int calibrate_lttng(void)
{
dom.type = LTTNG_DOMAIN_UST;
} else {
ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
- ret = CMD_UNDEFINED;
+ ret = CMD_ERROR;
goto error;
}
handle = lttng_create_handle(NULL, &dom);
if (handle == NULL) {
- ret = -1;
+ ret = CMD_ERROR;
goto error;
}
goto error;
}
+ ret = CMD_SUCCESS;
+
error:
lttng_destroy_handle(handle);
}
/*
- * cmd_calibrate
+ * Calibrate LTTng tracer.
*
- * Calibrate LTTng tracer.
+ * Returns a CMD_* error.
*/
int cmd_calibrate(int argc, const char **argv)
{
- int opt, ret;
+ int opt, ret = CMD_SUCCESS;
static poptContext pc;
pc = poptGetContext(NULL, argc, argv, long_options, 0);
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
- usage(stderr);
- ret = CMD_SUCCESS;
+ usage(stdout);
goto end;
case OPT_TRACEPOINT:
ret = CMD_UNDEFINED;
break;
case OPT_LIST_OPTIONS:
list_cmd_options(stdout, long_options);
- ret = CMD_SUCCESS;
goto end;
default:
usage(stderr);
ret = calibrate_lttng();
end:
+ poptFreeContext(pc);
return ret;
}