X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng%2Fcommands%2Fcalibrate.c;h=a60cadfa042a629eee9d97f1c4c1615a889e6656;hb=dad47fc4c65ec0acbfedc676895833b465d25cd6;hp=a0e852f8b03984836717c4d5c5317c08d7cbb696;hpb=4466912fc280873b6432973b287a48bf9c959b6c;p=lttng-tools.git

diff --git a/src/bin/lttng/commands/calibrate.c b/src/bin/lttng/commands/calibrate.c
index a0e852f8b..a60cadfa0 100644
--- a/src/bin/lttng/commands/calibrate.c
+++ b/src/bin/lttng/commands/calibrate.c
@@ -48,6 +48,7 @@ enum {
 	OPT_FUNCTION_ENTRY,
 	OPT_SYSCALL,
 	OPT_USERSPACE,
+	OPT_LIST_OPTIONS,
 };
 
 static struct lttng_handle *handle;
@@ -75,6 +76,7 @@ static struct poptOption long_options[] = {
 	{"function:entry", 0,   POPT_ARG_NONE, 0, OPT_FUNCTION_ENTRY, 0, 0},
 #endif
 	{"syscall",        0,   POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
+	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
 	{0, 0, 0, 0, 0, 0, 0}
 };
 
@@ -86,14 +88,15 @@ static void usage(FILE *ofp)
 	fprintf(ofp, "usage: lttng calibrate [options] [calibrate_options]\n");
 	fprintf(ofp, "\n");
 	fprintf(ofp, "  -h, --help               Show this help\n");
-	fprintf(ofp, "  -k, --kernel             Apply for the kernel tracer\n");
+	fprintf(ofp, "      --list-options       Simple listing of options\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");
@@ -114,9 +117,9 @@ static void usage(FILE *ofp)
 }
 
 /*
- *  calibrate_lttng
+ * Calibrate LTTng.
  *
- *  Calibrate LTTng.
+ * Returns a CMD_* error.
  */
 static int calibrate_lttng(void)
 {
@@ -131,13 +134,13 @@ 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;
 	}
 
@@ -153,6 +156,7 @@ static int calibrate_lttng(void)
 		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");
@@ -168,6 +172,8 @@ static int calibrate_lttng(void)
 		goto error;
 	}
 
+	ret = CMD_SUCCESS;
+
 error:
 	lttng_destroy_handle(handle);
 
@@ -175,9 +181,9 @@ error:
 }
 
 /*
- *  cmd_calibrate
+ * Calibrate LTTng tracer.
  *
- *  Calibrate LTTng tracer.
+ * Returns a CMD_* error.
  */
 int cmd_calibrate(int argc, const char **argv)
 {
@@ -193,7 +199,7 @@ 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:
@@ -217,6 +223,10 @@ int cmd_calibrate(int argc, const char **argv)
 		case OPT_USERSPACE:
 			opt_userspace = 1;
 			break;
+		case OPT_LIST_OPTIONS:
+			list_cmd_options(stdout, long_options);
+			ret = CMD_SUCCESS;
+			goto end;
 		default:
 			usage(stderr);
 			ret = CMD_UNDEFINED;