perf/util/usage.c

8c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0
8c2ecf20Sopenharmony_ci/*
8c2ecf20Sopenharmony_ci * usage.c
8c2ecf20Sopenharmony_ci *
8c2ecf20Sopenharmony_ci * Various reporting routines.
8c2ecf20Sopenharmony_ci * Originally copied from GIT source.
8c2ecf20Sopenharmony_ci *
8c2ecf20Sopenharmony_ci * Copyright (C) Linus Torvalds, 2005
8c2ecf20Sopenharmony_ci */
8c2ecf20Sopenharmony_ci#include "util.h"
8c2ecf20Sopenharmony_ci#include <stdio.h>
8c2ecf20Sopenharmony_ci#include <stdlib.h>
8c2ecf20Sopenharmony_ci#include <linux/compiler.h>
8c2ecf20Sopenharmony_ci
8c2ecf20Sopenharmony_cistatic __noreturn void usage_builtin(const char *err)
8c2ecf20Sopenharmony_ci{
8c2ecf20Sopenharmony_ci	fprintf(stderr, "\n Usage: %s\n", err);
8c2ecf20Sopenharmony_ci	exit(129);
8c2ecf20Sopenharmony_ci}
8c2ecf20Sopenharmony_ci
8c2ecf20Sopenharmony_ci/* If we are in a dlopen()ed .so write to a global variable would segfault
8c2ecf20Sopenharmony_ci * (ugh), so keep things static. */
8c2ecf20Sopenharmony_cistatic void (*usage_routine)(const char *err) __noreturn = usage_builtin;
8c2ecf20Sopenharmony_ci
8c2ecf20Sopenharmony_civoid usage(const char *err)
8c2ecf20Sopenharmony_ci{
8c2ecf20Sopenharmony_ci	usage_routine(err);
8c2ecf20Sopenharmony_ci}