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Commit | Line | Data |
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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 | ||
8 | static void report(const char *prefix, const char *err, va_list params) | |
9 | { | |
10 | char msg[4096]; | |
11 | vsnprintf(msg, sizeof(msg), err, params); | |
12 | fprintf(stderr, "%s%s\n", prefix, msg); | |
13 | } | |
14 | ||
15 | static NORETURN void usage_builtin(const char *err, va_list params) | |
16 | { | |
17 | report("usage: ", err, params); | |
18 | exit(129); | |
19 | } | |
20 | ||
21 | static NORETURN void die_builtin(const char *err, va_list params) | |
22 | { | |
23 | report("fatal: ", err, params); | |
24 | exit(128); | |
25 | } | |
26 | ||
27 | static void error_builtin(const char *err, va_list params) | |
28 | { | |
29 | report("error: ", err, params); | |
30 | } | |
31 | ||
32 | static void warn_builtin(const char *warn, va_list params) | |
33 | { | |
34 | report("warning: ", warn, params); | |
35 | } | |
36 | ||
37 | /* If we are in a dlopen()ed .so write to a global variable would segfault | |
38 | * (ugh), so keep things static. */ | |
39 | static NORETURN_PTR void (*usage_routine)(const char *err, va_list params) = usage_builtin; | |
40 | static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin; | |
41 | static void (*error_routine)(const char *err, va_list params) = error_builtin; | |
42 | static void (*warn_routine)(const char *err, va_list params) = warn_builtin; | |
43 | ||
44 | void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params)) | |
45 | { | |
46 | die_routine = routine; | |
47 | } | |
48 | ||
49 | void usagef(const char *err, ...) | |
50 | { | |
51 | va_list params; | |
52 | ||
53 | va_start(params, err); | |
54 | usage_routine(err, params); | |
55 | va_end(params); | |
56 | } | |
57 | ||
58 | void usage(const char *err) | |
59 | { | |
60 | usagef("%s", err); | |
61 | } | |
62 | ||
63 | void die(const char *err, ...) | |
64 | { | |
65 | va_list params; | |
66 | ||
67 | va_start(params, err); | |
68 | die_routine(err, params); | |
69 | va_end(params); | |
70 | } | |
71 | ||
72 | void die_errno(const char *fmt, ...) | |
73 | { | |
74 | va_list params; | |
75 | char fmt_with_err[1024]; | |
76 | char str_error[256], *err; | |
77 | int i, j; | |
78 | ||
79 | err = strerror(errno); | |
80 | for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) { | |
81 | if ((str_error[j++] = err[i++]) != '%') | |
82 | continue; | |
83 | if (j < sizeof(str_error) - 1) { | |
84 | str_error[j++] = '%'; | |
85 | } else { | |
86 | /* No room to double the '%', so we overwrite it with | |
87 | * '\0' below */ | |
88 | j--; | |
89 | break; | |
90 | } | |
91 | } | |
92 | str_error[j] = 0; | |
93 | snprintf(fmt_with_err, sizeof(fmt_with_err), "%s: %s", fmt, str_error); | |
94 | ||
95 | va_start(params, fmt); | |
96 | die_routine(fmt_with_err, params); | |
97 | va_end(params); | |
98 | } | |
99 | ||
100 | int error(const char *err, ...) | |
101 | { | |
102 | va_list params; | |
103 | ||
104 | va_start(params, err); | |
105 | error_routine(err, params); | |
106 | va_end(params); | |
107 | return -1; | |
108 | } | |
109 | ||
110 | void warning(const char *warn, ...) | |
111 | { | |
112 | va_list params; | |
113 | ||
114 | va_start(params, warn); | |
115 | warn_routine(warn, params); | |
116 | va_end(params); | |
117 | } |