gitk: Second try to work around the command line limit on Windows
[git/dscho.git] / usage.c
blobec4cf53b6bf16f7f9b3528a430891d6c68ef64cc
1 /*
2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 */
6 #include "git-compat-util.h"
8 void vreportf(const char *prefix, const char *err, va_list params)
10 char msg[4096];
11 vsnprintf(msg, sizeof(msg), err, params);
12 fprintf(stderr, "%s%s\n", prefix, msg);
15 static NORETURN void usage_builtin(const char *err, va_list params)
17 vreportf("usage: ", err, params);
18 exit(129);
21 static NORETURN void die_builtin(const char *err, va_list params)
23 vreportf("fatal: ", err, params);
24 exit(128);
27 static void error_builtin(const char *err, va_list params)
29 vreportf("error: ", err, params);
32 static void warn_builtin(const char *warn, va_list params)
34 vreportf("warning: ", warn, params);
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;
44 void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params))
46 die_routine = routine;
49 void usagef(const char *err, ...)
51 va_list params;
53 va_start(params, err);
54 usage_routine(err, params);
55 va_end(params);
58 void usage(const char *err)
60 usagef("%s", err);
63 void die(const char *err, ...)
65 va_list params;
67 va_start(params, err);
68 die_routine(err, params);
69 va_end(params);
72 void die_errno(const char *fmt, ...)
74 va_list params;
75 char fmt_with_err[1024];
76 char str_error[256], *err;
77 int i, j;
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;
92 str_error[j] = 0;
93 snprintf(fmt_with_err, sizeof(fmt_with_err), "%s: %s", fmt, str_error);
95 va_start(params, fmt);
96 die_routine(fmt_with_err, params);
97 va_end(params);
100 int error(const char *err, ...)
102 va_list params;
104 va_start(params, err);
105 error_routine(err, params);
106 va_end(params);
107 return -1;
110 void warning(const char *warn, ...)
112 va_list params;
114 va_start(params, warn);
115 warn_routine(warn, params);
116 va_end(params);