fast-export: fix argument name in error messages
[git/git.git] / usage.c
... / ...
CommitLineData
1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
6#include "git-compat-util.h"
7#include "cache.h"
8
9static int dying;
10
11void vreportf(const char *prefix, const char *err, va_list params)
12{
13 char msg[4096];
14 vsnprintf(msg, sizeof(msg), err, params);
15 fprintf(stderr, "%s%s\n", prefix, msg);
16}
17
18void vwritef(int fd, const char *prefix, const char *err, va_list params)
19{
20 char msg[4096];
21 int len = vsnprintf(msg, sizeof(msg), err, params);
22 if (len > sizeof(msg))
23 len = sizeof(msg);
24
25 write_in_full(fd, prefix, strlen(prefix));
26 write_in_full(fd, msg, len);
27 write_in_full(fd, "\n", 1);
28}
29
30static NORETURN void usage_builtin(const char *err, va_list params)
31{
32 vreportf("usage: ", err, params);
33 exit(129);
34}
35
36static NORETURN void die_builtin(const char *err, va_list params)
37{
38 vreportf("fatal: ", err, params);
39 exit(128);
40}
41
42static void error_builtin(const char *err, va_list params)
43{
44 vreportf("error: ", err, params);
45}
46
47static void warn_builtin(const char *warn, va_list params)
48{
49 vreportf("warning: ", warn, params);
50}
51
52/* If we are in a dlopen()ed .so write to a global variable would segfault
53 * (ugh), so keep things static. */
54static NORETURN_PTR void (*usage_routine)(const char *err, va_list params) = usage_builtin;
55static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin;
56static void (*error_routine)(const char *err, va_list params) = error_builtin;
57static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
58
59void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params))
60{
61 die_routine = routine;
62}
63
64void set_error_routine(void (*routine)(const char *err, va_list params))
65{
66 error_routine = routine;
67}
68
69void NORETURN usagef(const char *err, ...)
70{
71 va_list params;
72
73 va_start(params, err);
74 usage_routine(err, params);
75 va_end(params);
76}
77
78void NORETURN usage(const char *err)
79{
80 usagef("%s", err);
81}
82
83void NORETURN die(const char *err, ...)
84{
85 va_list params;
86
87 if (dying) {
88 fputs("fatal: recursion detected in die handler\n", stderr);
89 exit(128);
90 }
91 dying = 1;
92
93 va_start(params, err);
94 die_routine(err, params);
95 va_end(params);
96}
97
98void NORETURN die_errno(const char *fmt, ...)
99{
100 va_list params;
101 char fmt_with_err[1024];
102 char str_error[256], *err;
103 int i, j;
104
105 if (dying) {
106 fputs("fatal: recursion detected in die_errno handler\n",
107 stderr);
108 exit(128);
109 }
110 dying = 1;
111
112 err = strerror(errno);
113 for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) {
114 if ((str_error[j++] = err[i++]) != '%')
115 continue;
116 if (j < sizeof(str_error) - 1) {
117 str_error[j++] = '%';
118 } else {
119 /* No room to double the '%', so we overwrite it with
120 * '\0' below */
121 j--;
122 break;
123 }
124 }
125 str_error[j] = 0;
126 snprintf(fmt_with_err, sizeof(fmt_with_err), "%s: %s", fmt, str_error);
127
128 va_start(params, fmt);
129 die_routine(fmt_with_err, params);
130 va_end(params);
131}
132
133int error(const char *err, ...)
134{
135 va_list params;
136
137 va_start(params, err);
138 error_routine(err, params);
139 va_end(params);
140 return -1;
141}
142
143void warning(const char *warn, ...)
144{
145 va_list params;
146
147 va_start(params, warn);
148 warn_routine(warn, params);
149 va_end(params);
150}