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