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Commit | Line | Data |
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0fcfd160 LT |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
4050c0df | 6 | #include "git-compat-util.h" |
3bc4181f | 7 | #include "cache.h" |
0fcfd160 | 8 | |
ebaa79f4 | 9 | void vreportf(const char *prefix, const char *err, va_list params) |
0fcfd160 | 10 | { |
b5a9e435 | 11 | char msg[4096]; |
f2900898 | 12 | char *p; |
f4c3edc0 | 13 | |
b5a9e435 | 14 | vsnprintf(msg, sizeof(msg), err, params); |
f2900898 JK |
15 | for (p = msg; *p; p++) { |
16 | if (iscntrl(*p) && *p != '\t' && *p != '\n') | |
17 | *p = '?'; | |
f4c3edc0 | 18 | } |
e3f43ce7 | 19 | fprintf(stderr, "%s%s\n", prefix, msg); |
3bc4181f CB |
20 | } |
21 | ||
64b1cb74 | 22 | static NORETURN void usage_builtin(const char *err, va_list params) |
0fcfd160 | 23 | { |
ebaa79f4 | 24 | vreportf("usage: ", err, params); |
5d1a5c02 | 25 | exit(129); |
0fcfd160 LT |
26 | } |
27 | ||
ce88ac5b | 28 | static NORETURN void die_builtin(const char *err, va_list params) |
39a3f5ea | 29 | { |
ebaa79f4 | 30 | vreportf("fatal: ", err, params); |
39a3f5ea PB |
31 | exit(128); |
32 | } | |
33 | ||
ce88ac5b | 34 | static void error_builtin(const char *err, va_list params) |
39a3f5ea | 35 | { |
ebaa79f4 | 36 | vreportf("error: ", err, params); |
39a3f5ea PB |
37 | } |
38 | ||
fa39b6b5 SP |
39 | static void warn_builtin(const char *warn, va_list params) |
40 | { | |
ebaa79f4 | 41 | vreportf("warning: ", warn, params); |
fa39b6b5 | 42 | } |
39a3f5ea | 43 | |
c19a490e JK |
44 | static int die_is_recursing_builtin(void) |
45 | { | |
46 | static int dying; | |
2d3c02f5 ÆAB |
47 | /* |
48 | * Just an arbitrary number X where "a < x < b" where "a" is | |
49 | * "maximum number of pthreads we'll ever plausibly spawn" and | |
50 | * "b" is "something less than Inf", since the point is to | |
51 | * prevent infinite recursion. | |
52 | */ | |
53 | static const int recursion_limit = 1024; | |
54 | ||
55 | dying++; | |
56 | if (dying > recursion_limit) { | |
57 | return 1; | |
58 | } else if (dying == 2) { | |
59 | warning("die() called many times. Recursion error or racy threaded death!"); | |
60 | return 0; | |
61 | } else { | |
62 | return 0; | |
63 | } | |
c19a490e JK |
64 | } |
65 | ||
39a3f5ea PB |
66 | /* If we are in a dlopen()ed .so write to a global variable would segfault |
67 | * (ugh), so keep things static. */ | |
64b1cb74 | 68 | static NORETURN_PTR void (*usage_routine)(const char *err, va_list params) = usage_builtin; |
18660bc9 | 69 | static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin; |
39a3f5ea | 70 | static void (*error_routine)(const char *err, va_list params) = error_builtin; |
fa39b6b5 | 71 | static void (*warn_routine)(const char *err, va_list params) = warn_builtin; |
c19a490e | 72 | static int (*die_is_recursing)(void) = die_is_recursing_builtin; |
39a3f5ea | 73 | |
18660bc9 | 74 | void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params)) |
39a3f5ea PB |
75 | { |
76 | die_routine = routine; | |
77 | } | |
78 | ||
3bc4181f CB |
79 | void set_error_routine(void (*routine)(const char *err, va_list params)) |
80 | { | |
81 | error_routine = routine; | |
82 | } | |
83 | ||
725149be CC |
84 | void (*get_error_routine(void))(const char *err, va_list params) |
85 | { | |
86 | return error_routine; | |
87 | } | |
88 | ||
b83f108b CC |
89 | void set_warn_routine(void (*routine)(const char *warn, va_list params)) |
90 | { | |
91 | warn_routine = routine; | |
92 | } | |
93 | ||
725149be CC |
94 | void (*get_warn_routine(void))(const char *warn, va_list params) |
95 | { | |
96 | return warn_routine; | |
97 | } | |
98 | ||
c19a490e JK |
99 | void set_die_is_recursing_routine(int (*routine)(void)) |
100 | { | |
101 | die_is_recursing = routine; | |
102 | } | |
103 | ||
c2e86add | 104 | void NORETURN usagef(const char *err, ...) |
64b1cb74 JN |
105 | { |
106 | va_list params; | |
107 | ||
108 | va_start(params, err); | |
109 | usage_routine(err, params); | |
110 | va_end(params); | |
111 | } | |
112 | ||
c2e86add | 113 | void NORETURN usage(const char *err) |
39a3f5ea | 114 | { |
64b1cb74 | 115 | usagef("%s", err); |
39a3f5ea PB |
116 | } |
117 | ||
c2e86add | 118 | void NORETURN die(const char *err, ...) |
0fcfd160 LT |
119 | { |
120 | va_list params; | |
121 | ||
c19a490e | 122 | if (die_is_recursing()) { |
cd163d4b BC |
123 | fputs("fatal: recursion detected in die handler\n", stderr); |
124 | exit(128); | |
125 | } | |
cd163d4b | 126 | |
0fcfd160 | 127 | va_start(params, err); |
39a3f5ea | 128 | die_routine(err, params); |
0fcfd160 | 129 | va_end(params); |
0fcfd160 LT |
130 | } |
131 | ||
58e4e511 | 132 | static const char *fmt_with_err(char *buf, int n, const char *fmt) |
b875036e | 133 | { |
f8b5a8e1 JH |
134 | char str_error[256], *err; |
135 | int i, j; | |
136 | ||
137 | err = strerror(errno); | |
138 | for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) { | |
139 | if ((str_error[j++] = err[i++]) != '%') | |
140 | continue; | |
141 | if (j < sizeof(str_error) - 1) { | |
142 | str_error[j++] = '%'; | |
143 | } else { | |
144 | /* No room to double the '%', so we overwrite it with | |
145 | * '\0' below */ | |
146 | j--; | |
147 | break; | |
148 | } | |
149 | } | |
150 | str_error[j] = 0; | |
ac4896f0 | 151 | /* Truncation is acceptable here */ |
58e4e511 NTND |
152 | snprintf(buf, n, "%s: %s", fmt, str_error); |
153 | return buf; | |
154 | } | |
155 | ||
156 | void NORETURN die_errno(const char *fmt, ...) | |
157 | { | |
158 | char buf[1024]; | |
159 | va_list params; | |
160 | ||
161 | if (die_is_recursing()) { | |
162 | fputs("fatal: recursion detected in die_errno handler\n", | |
163 | stderr); | |
164 | exit(128); | |
165 | } | |
b875036e TR |
166 | |
167 | va_start(params, fmt); | |
58e4e511 | 168 | die_routine(fmt_with_err(buf, sizeof(buf), fmt), params); |
b875036e TR |
169 | va_end(params); |
170 | } | |
171 | ||
4df5e918 | 172 | #undef error_errno |
fd1d6723 NTND |
173 | int error_errno(const char *fmt, ...) |
174 | { | |
175 | char buf[1024]; | |
176 | va_list params; | |
177 | ||
178 | va_start(params, fmt); | |
179 | error_routine(fmt_with_err(buf, sizeof(buf), fmt), params); | |
180 | va_end(params); | |
181 | return -1; | |
182 | } | |
183 | ||
e208f9cc | 184 | #undef error |
0fcfd160 LT |
185 | int error(const char *err, ...) |
186 | { | |
187 | va_list params; | |
188 | ||
189 | va_start(params, err); | |
39a3f5ea | 190 | error_routine(err, params); |
0fcfd160 LT |
191 | va_end(params); |
192 | return -1; | |
193 | } | |
fa39b6b5 | 194 | |
fd1d6723 NTND |
195 | void warning_errno(const char *warn, ...) |
196 | { | |
197 | char buf[1024]; | |
198 | va_list params; | |
199 | ||
200 | va_start(params, warn); | |
201 | warn_routine(fmt_with_err(buf, sizeof(buf), warn), params); | |
202 | va_end(params); | |
203 | } | |
204 | ||
46efd2d9 | 205 | void warning(const char *warn, ...) |
fa39b6b5 SP |
206 | { |
207 | va_list params; | |
208 | ||
209 | va_start(params, warn); | |
210 | warn_routine(warn, params); | |
211 | va_end(params); | |
212 | } | |
d8193743 | 213 | |
a86303cb JS |
214 | /* Only set this, ever, from t/helper/, when verifying that bugs are caught. */ |
215 | int BUG_exit_code; | |
216 | ||
d8193743 JK |
217 | static NORETURN void BUG_vfl(const char *file, int line, const char *fmt, va_list params) |
218 | { | |
219 | char prefix[256]; | |
220 | ||
221 | /* truncation via snprintf is OK here */ | |
222 | if (file) | |
223 | snprintf(prefix, sizeof(prefix), "BUG: %s:%d: ", file, line); | |
224 | else | |
225 | snprintf(prefix, sizeof(prefix), "BUG: "); | |
226 | ||
227 | vreportf(prefix, fmt, params); | |
a86303cb JS |
228 | if (BUG_exit_code) |
229 | exit(BUG_exit_code); | |
d8193743 JK |
230 | abort(); |
231 | } | |
232 | ||
233 | #ifdef HAVE_VARIADIC_MACROS | |
3d7dd2d3 | 234 | NORETURN void BUG_fl(const char *file, int line, const char *fmt, ...) |
d8193743 JK |
235 | { |
236 | va_list ap; | |
237 | va_start(ap, fmt); | |
238 | BUG_vfl(file, line, fmt, ap); | |
239 | va_end(ap); | |
240 | } | |
241 | #else | |
3d7dd2d3 | 242 | NORETURN void BUG(const char *fmt, ...) |
d8193743 JK |
243 | { |
244 | va_list ap; | |
245 | va_start(ap, fmt); | |
246 | BUG_vfl(NULL, 0, fmt, ap); | |
247 | va_end(ap); | |
248 | } | |
249 | #endif | |
0e5bba53 JK |
250 | |
251 | #ifdef SUPPRESS_ANNOTATED_LEAKS | |
252 | void unleak_memory(const void *ptr, size_t len) | |
253 | { | |
254 | static struct suppressed_leak_root { | |
255 | struct suppressed_leak_root *next; | |
256 | char data[FLEX_ARRAY]; | |
257 | } *suppressed_leaks; | |
258 | struct suppressed_leak_root *root; | |
259 | ||
260 | FLEX_ALLOC_MEM(root, data, ptr, len); | |
261 | root->next = suppressed_leaks; | |
262 | suppressed_leaks = root; | |
263 | } | |
264 | #endif |