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}

 
 1/*
 2 * usage.c
 3 *
 4 * Various reporting routines.
 5 * Originally copied from GIT source.
 6 *
 7 * Copyright (C) Linus Torvalds, 2005
 8 */
 9#include "util.h"
10#include "debug.h"
 
 
11
12static void report(const char *prefix, const char *err, va_list params)
13{
14	char msg[1024];
15	vsnprintf(msg, sizeof(msg), err, params);
16	fprintf(stderr, " %s%s\n", prefix, msg);
17}
18
19static NORETURN void usage_builtin(const char *err)
20{
21	fprintf(stderr, "\n Usage: %s\n", err);
22	exit(129);
23}
24
25static NORETURN void die_builtin(const char *err, va_list params)
26{
27	report(" Fatal: ", err, params);
28	exit(128);
29}
30
31static void error_builtin(const char *err, va_list params)
32{
33	report(" Error: ", err, params);
34}
35
36static void warn_builtin(const char *warn, va_list params)
37{
38	report(" Warning: ", warn, params);
39}
40
41/* If we are in a dlopen()ed .so write to a global variable would segfault
42 * (ugh), so keep things static. */
43static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
44static void (*error_routine)(const char *err, va_list params) = error_builtin;
45static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
46
47void set_warning_routine(void (*routine)(const char *err, va_list params))
48{
49	warn_routine = routine;
50}
51
52void usage(const char *err)
53{
54	usage_routine(err);
55}
56
57void die(const char *err, ...)
58{
59	va_list params;
60
61	va_start(params, err);
62	die_builtin(err, params);
63	va_end(params);
64}
65
66int error(const char *err, ...)
67{
68	va_list params;
69
70	va_start(params, err);
71	error_routine(err, params);
72	va_end(params);
73	return -1;
74}
75
76void warning(const char *warn, ...)
77{
78	va_list params;
79
80	va_start(params, warn);
81	warn_routine(warn, params);
82	va_end(params);
83}