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