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)
{
handle = lttng_create_handle(NULL, &dom);
if (handle == NULL) {
- ret = -1;
+ ret = CMD_ERROR;
goto error;
}
calibrate.type = LTTNG_CALIBRATE_FUNCTION;
ret = lttng_calibrate(handle, &calibrate);
if (ret < 0) {
+ ret = CMD_ERROR;
goto error;
}
MSG("%s calibration done", opt_kernel ? "Kernel" : "UST");
goto error;
}
+ ret = CMD_SUCCESS;
+
error:
lttng_destroy_handle(handle);
}
/*
- * cmd_calibrate
- *
- * Calibrate LTTng tracer.
+ * Calibrate LTTng tracer.
*/
int cmd_calibrate(int argc, const char **argv)
{
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
- usage(stderr);
+ usage(stdout);
ret = CMD_SUCCESS;
goto end;
case OPT_TRACEPOINT: