+/*
+ * Copyright (C) 2011 EfficiOS Inc.
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#ifndef _LTTNG_UST_ERROR_H
+#define _LTTNG_UST_ERROR_H
+
+/*
+ * This header is meant for liblttng and libust internal use ONLY.
+ * These declarations should NOT be considered stable API.
+ */
+
+#include <limits.h>
+#include <unistd.h>
+
+#include "lttng-ust-abi.hpp"
+
+/*
+ * ustcomm error code.
+ */
+enum lttng_ust_error_code {
+ LTTNG_UST_OK = 0, /* Ok */
+ LTTNG_UST_ERR = 1024, /* Unknown Error */
+ LTTNG_UST_ERR_NOENT = 1025, /* No entry */
+ LTTNG_UST_ERR_EXIST = 1026, /* Object exists */
+ LTTNG_UST_ERR_INVAL = 1027, /* Invalid argument */
+ LTTNG_UST_ERR_PERM = 1028, /* Permission denied */
+ LTTNG_UST_ERR_NOSYS = 1029, /* Not implemented */
+ LTTNG_UST_ERR_EXITING = 1030, /* Process is exiting */
+
+ LTTNG_UST_ERR_INVAL_MAGIC = 1031, /* Invalid magic number */
+ LTTNG_UST_ERR_INVAL_SOCKET_TYPE = 1032, /* Invalid socket type */
+ LTTNG_UST_ERR_UNSUP_MAJOR = 1033, /* Unsupported major version */
+
+ /* MUST be last element */
+ LTTNG_UST_ERR_NR, /* Last element */
+};
+
+/*
+ * Return a human-readable error message for an lttng-ust error code.
+ * code must be a positive value (or 0).
+ */
+extern const char *lttng_ust_strerror(int code);
+
+#endif /* _LTTNG_UST_ERROR_H */