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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 | ||
9 | void vreportf(const char *prefix, const char *err, va_list params) | |
10 | { | |
11 | char msg[4096]; | |
12 | char *p; | |
13 | ||
14 | vsnprintf(msg, sizeof(msg), err, params); | |
15 | for (p = msg; *p; p++) { | |
16 | if (iscntrl(*p) && *p != '\t' && *p != '\n') | |
17 | *p = '?'; | |
18 | } | |
19 | fprintf(stderr, "%s%s\n", prefix, msg); | |
20 | } | |
21 | ||
22 | static NORETURN void usage_builtin(const char *err, va_list params) | |
23 | { | |
24 | vreportf("usage: ", err, params); | |
25 | exit(129); | |
26 | } | |
27 | ||
28 | static NORETURN void die_builtin(const char *err, va_list params) | |
29 | { | |
30 | vreportf("fatal: ", err, params); | |
31 | exit(128); | |
32 | } | |
33 | ||
34 | static void error_builtin(const char *err, va_list params) | |
35 | { | |
36 | vreportf("error: ", err, params); | |
37 | } | |
38 | ||
39 | static void warn_builtin(const char *warn, va_list params) | |
40 | { | |
41 | vreportf("warning: ", warn, params); | |
42 | } | |
43 | ||
44 | static int die_is_recursing_builtin(void) | |
45 | { | |
46 | static int dying; | |
47 | return dying++; | |
48 | } | |
49 | ||
50 | /* If we are in a dlopen()ed .so write to a global variable would segfault | |
51 | * (ugh), so keep things static. */ | |
52 | static NORETURN_PTR void (*usage_routine)(const char *err, va_list params) = usage_builtin; | |
53 | static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin; | |
54 | static void (*error_routine)(const char *err, va_list params) = error_builtin; | |
55 | static void (*warn_routine)(const char *err, va_list params) = warn_builtin; | |
56 | static int (*die_is_recursing)(void) = die_is_recursing_builtin; | |
57 | ||
58 | void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params)) | |
59 | { | |
60 | die_routine = routine; | |
61 | } | |
62 | ||
63 | void set_error_routine(void (*routine)(const char *err, va_list params)) | |
64 | { | |
65 | error_routine = routine; | |
66 | } | |
67 | ||
68 | void (*get_error_routine(void))(const char *err, va_list params) | |
69 | { | |
70 | return error_routine; | |
71 | } | |
72 | ||
73 | void set_warn_routine(void (*routine)(const char *warn, va_list params)) | |
74 | { | |
75 | warn_routine = routine; | |
76 | } | |
77 | ||
78 | void (*get_warn_routine(void))(const char *warn, va_list params) | |
79 | { | |
80 | return warn_routine; | |
81 | } | |
82 | ||
83 | void set_die_is_recursing_routine(int (*routine)(void)) | |
84 | { | |
85 | die_is_recursing = routine; | |
86 | } | |
87 | ||
88 | void NORETURN usagef(const char *err, ...) | |
89 | { | |
90 | va_list params; | |
91 | ||
92 | va_start(params, err); | |
93 | usage_routine(err, params); | |
94 | va_end(params); | |
95 | } | |
96 | ||
97 | void NORETURN usage(const char *err) | |
98 | { | |
99 | usagef("%s", err); | |
100 | } | |
101 | ||
102 | void NORETURN die(const char *err, ...) | |
103 | { | |
104 | va_list params; | |
105 | ||
106 | if (die_is_recursing()) { | |
107 | fputs("fatal: recursion detected in die handler\n", stderr); | |
108 | exit(128); | |
109 | } | |
110 | ||
111 | va_start(params, err); | |
112 | die_routine(err, params); | |
113 | va_end(params); | |
114 | } | |
115 | ||
116 | static const char *fmt_with_err(char *buf, int n, const char *fmt) | |
117 | { | |
118 | char str_error[256], *err; | |
119 | int i, j; | |
120 | ||
121 | err = strerror(errno); | |
122 | for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) { | |
123 | if ((str_error[j++] = err[i++]) != '%') | |
124 | continue; | |
125 | if (j < sizeof(str_error) - 1) { | |
126 | str_error[j++] = '%'; | |
127 | } else { | |
128 | /* No room to double the '%', so we overwrite it with | |
129 | * '\0' below */ | |
130 | j--; | |
131 | break; | |
132 | } | |
133 | } | |
134 | str_error[j] = 0; | |
135 | snprintf(buf, n, "%s: %s", fmt, str_error); | |
136 | return buf; | |
137 | } | |
138 | ||
139 | void NORETURN die_errno(const char *fmt, ...) | |
140 | { | |
141 | char buf[1024]; | |
142 | va_list params; | |
143 | ||
144 | if (die_is_recursing()) { | |
145 | fputs("fatal: recursion detected in die_errno handler\n", | |
146 | stderr); | |
147 | exit(128); | |
148 | } | |
149 | ||
150 | va_start(params, fmt); | |
151 | die_routine(fmt_with_err(buf, sizeof(buf), fmt), params); | |
152 | va_end(params); | |
153 | } | |
154 | ||
155 | #undef error_errno | |
156 | int error_errno(const char *fmt, ...) | |
157 | { | |
158 | char buf[1024]; | |
159 | va_list params; | |
160 | ||
161 | va_start(params, fmt); | |
162 | error_routine(fmt_with_err(buf, sizeof(buf), fmt), params); | |
163 | va_end(params); | |
164 | return -1; | |
165 | } | |
166 | ||
167 | #undef error | |
168 | int error(const char *err, ...) | |
169 | { | |
170 | va_list params; | |
171 | ||
172 | va_start(params, err); | |
173 | error_routine(err, params); | |
174 | va_end(params); | |
175 | return -1; | |
176 | } | |
177 | ||
178 | void warning_errno(const char *warn, ...) | |
179 | { | |
180 | char buf[1024]; | |
181 | va_list params; | |
182 | ||
183 | va_start(params, warn); | |
184 | warn_routine(fmt_with_err(buf, sizeof(buf), warn), params); | |
185 | va_end(params); | |
186 | } | |
187 | ||
188 | void warning(const char *warn, ...) | |
189 | { | |
190 | va_list params; | |
191 | ||
192 | va_start(params, warn); | |
193 | warn_routine(warn, params); | |
194 | va_end(params); | |
195 | } | |
196 | ||
197 | static NORETURN void BUG_vfl(const char *file, int line, const char *fmt, va_list params) | |
198 | { | |
199 | char prefix[256]; | |
200 | ||
201 | /* truncation via snprintf is OK here */ | |
202 | if (file) | |
203 | snprintf(prefix, sizeof(prefix), "BUG: %s:%d: ", file, line); | |
204 | else | |
205 | snprintf(prefix, sizeof(prefix), "BUG: "); | |
206 | ||
207 | vreportf(prefix, fmt, params); | |
208 | abort(); | |
209 | } | |
210 | ||
211 | #ifdef HAVE_VARIADIC_MACROS | |
212 | NORETURN void BUG_fl(const char *file, int line, const char *fmt, ...) | |
213 | { | |
214 | va_list ap; | |
215 | va_start(ap, fmt); | |
216 | BUG_vfl(file, line, fmt, ap); | |
217 | va_end(ap); | |
218 | } | |
219 | #else | |
220 | NORETURN void BUG(const char *fmt, ...) | |
221 | { | |
222 | va_list ap; | |
223 | va_start(ap, fmt); | |
224 | BUG_vfl(NULL, 0, fmt, ap); | |
225 | va_end(ap); | |
226 | } | |
227 | #endif |