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 usage(const char *err)
54{
55	usage_routine(err);
56}
57
58void 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
67int 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
77void warning(const char *warn, ...)
78{
79	va_list params;
80
81	va_start(params, warn);
82	warn_routine(warn, params);
83	va_end(params);
84}
85