1// SPDX-License-Identifier: GPL-2.0 2/* 3 * usage.c 4 * 5 * Various reporting routines. 6 * Originally copied from GIT source. 7 * 8 * Copyright (C) Linus Torvalds, 2005 9 */ 10#include "util.h" 11#include <stdio.h> 12#include <stdlib.h> 13#include <linux/compiler.h> 14 15const char perf_usage_string[] = 16 "perf [--version] [--help] [OPTIONS] COMMAND [ARGS]"; 17 18const char perf_more_info_string[] = 19 "See 'perf help COMMAND' for more information on a specific command."; 20 21static __noreturn void usage_builtin(const char *err) 22{ 23 fprintf(stderr, "\n Usage: %s\n", err); 24 exit(129); 25} 26 27/* If we are in a dlopen()ed .so write to a global variable would segfault 28 * (ugh), so keep things static. */ 29static void (*usage_routine)(const char *err) __noreturn = usage_builtin; 30 31void usage(const char *err) 32{ 33 usage_routine(err); 34} 35