Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;
45static void (*error_routine)(const char *err, va_list params) = error_builtin;
46static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
47
48void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
49{
50 die_routine = routine;
51}
52
53void set_warning_routine(void (*routine)(const char *err, va_list params))
54{
55 warn_routine = routine;
56}
57
58void usage(const char *err)
59{
60 usage_routine(err);
61}
62
63void die(const char *err, ...)
64{
65 va_list params;
66
67 va_start(params, err);
68 die_routine(err, params);
69 va_end(params);
70}
71
72int error(const char *err, ...)
73{
74 va_list params;
75
76 va_start(params, err);
77 error_routine(err, params);
78 va_end(params);
79 return -1;
80}
81
82void warning(const char *warn, ...)
83{
84 va_list params;
85
86 va_start(params, warn);
87 warn_routine(warn, params);
88 va_end(params);
89}