1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "git-compat-util.h"
static void report(const char *prefix, const char *err, va_list params)
{
char msg[1024];
vsnprintf(msg, sizeof(msg), err, params);
fprintf(stderr, "%s%s\n", prefix, msg);
}
static NORETURN void usage_builtin(const char *err, va_list params)
{
report("usage: ", err, params);
exit(129);
}
static NORETURN void die_builtin(const char *err, va_list params)
{
report("fatal: ", err, params);
exit(128);
}
static void error_builtin(const char *err, va_list params)
{
report("error: ", err, params);
}
static void warn_builtin(const char *warn, va_list params)
{
report("warning: ", warn, params);
}
/* If we are in a dlopen()ed .so write to a global variable would segfault
* (ugh), so keep things static. */
static NORETURN_PTR void (*usage_routine)(const char *err, va_list params) = usage_builtin;
static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin;
static void (*error_routine)(const char *err, va_list params) = error_builtin;
static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params))
{
die_routine = routine;
}
void usagef(const char *err, ...)
{
va_list params;
va_start(params, err);
usage_routine(err, params);
va_end(params);
}
void usage(const char *err)
{
usagef("%s", err);
}
void die(const char *err, ...)
{
va_list params;
va_start(params, err);
die_routine(err, params);
va_end(params);
}
void die_errno(const char *fmt, ...)
{
va_list params;
char fmt_with_err[1024];
char str_error[256], *err;
int i, j;
err = strerror(errno);
for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) {
if ((str_error[j++] = err[i++]) != '%')
continue;
if (j < sizeof(str_error) - 1) {
str_error[j++] = '%';
} else {
/* No room to double the '%', so we overwrite it with
* '\0' below */
j--;
break;
}
}
str_error[j] = 0;
snprintf(fmt_with_err, sizeof(fmt_with_err), "%s: %s", fmt, str_error);
va_start(params, fmt);
die_routine(fmt_with_err, params);
va_end(params);
}
int error(const char *err, ...)
{
va_list params;
va_start(params, err);
error_routine(err, params);
va_end(params);
return -1;
}
void warning(const char *warn, ...)
{
va_list params;
va_start(params, warn);
warn_routine(warn, params);
va_end(params);
}
|
