1 // SPDX-License-Identifier: GPL-2.0 <<
2 /* 1 /*
3 * usage.c 2 * usage.c
4 * 3 *
5 * Various reporting routines. 4 * Various reporting routines.
6 * Originally copied from GIT source. 5 * Originally copied from GIT source.
7 * 6 *
8 * Copyright (C) Linus Torvalds, 2005 7 * Copyright (C) Linus Torvalds, 2005
9 */ 8 */
10 #include "util.h" 9 #include "util.h"
11 #include <stdio.h> !! 10 #include "debug.h"
12 #include <stdlib.h> <<
13 #include <linux/compiler.h> <<
14 11
15 const char perf_usage_string[] = !! 12 static void report(const char *prefix, const char *err, va_list params)
16 "perf [--version] [--help] [OPTIONS] C !! 13 {
17 !! 14 char msg[1024];
18 const char perf_more_info_string[] = !! 15 vsnprintf(msg, sizeof(msg), err, params);
19 "See 'perf help COMMAND' for more info !! 16 fprintf(stderr, " %s%s\n", prefix, msg);
>> 17 }
20 18
21 static __noreturn void usage_builtin(const cha !! 19 static NORETURN void usage_builtin(const char *err)
22 { 20 {
23 fprintf(stderr, "\n Usage: %s\n", err) 21 fprintf(stderr, "\n Usage: %s\n", err);
24 exit(129); 22 exit(129);
25 } 23 }
26 24
>> 25 static NORETURN void die_builtin(const char *err, va_list params)
>> 26 {
>> 27 report(" Fatal: ", err, params);
>> 28 exit(128);
>> 29 }
>> 30
>> 31 static void error_builtin(const char *err, va_list params)
>> 32 {
>> 33 report(" Error: ", err, params);
>> 34 }
>> 35
>> 36 static void warn_builtin(const char *warn, va_list params)
>> 37 {
>> 38 report(" Warning: ", warn, params);
>> 39 }
>> 40
27 /* If we are in a dlopen()ed .so write to a gl 41 /* If we are in a dlopen()ed .so write to a global variable would segfault
28 * (ugh), so keep things static. */ 42 * (ugh), so keep things static. */
29 static void (*usage_routine)(const char *err) !! 43 static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
>> 44 static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;
>> 45 static void (*error_routine)(const char *err, va_list params) = error_builtin;
>> 46 static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
>> 47
>> 48 void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
>> 49 {
>> 50 die_routine = routine;
>> 51 }
30 52
31 void usage(const char *err) 53 void usage(const char *err)
32 { 54 {
33 usage_routine(err); 55 usage_routine(err);
>> 56 }
>> 57
>> 58 void die(const char *err, ...)
>> 59 {
>> 60 va_list params;
>> 61
>> 62 va_start(params, err);
>> 63 die_routine(err, params);
>> 64 va_end(params);
>> 65 }
>> 66
>> 67 int error(const char *err, ...)
>> 68 {
>> 69 va_list params;
>> 70
>> 71 va_start(params, err);
>> 72 error_routine(err, params);
>> 73 va_end(params);
>> 74 return -1;
>> 75 }
>> 76
>> 77 void warning(const char *warn, ...)
>> 78 {
>> 79 va_list params;
>> 80
>> 81 va_start(params, warn);
>> 82 warn_routine(warn, params);
>> 83 va_end(params);
34 } 84 }
35 85
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