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 15 const char perf_usage_string[] = 16 "perf [--version] [--help] [OPTIONS] COMMAND [ARGS]"; 17 18 const char perf_more_info_string[] = 19 "See 'perf help COMMAND' for more information on a specific command."; 20 usage_builtin(const char * err)21 static __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. */ 29 static void (*usage_routine)(const char *err) __noreturn = usage_builtin; 30 usage(const char * err)31 void usage(const char *err) 32 { 33 usage_routine(err); 34 } 35