Merge branch 'maint'
[git/jnareb-git.git] / usage.c
blob52c2e960560531b62a28a8a716e531093fd5e8a7
1 /*
2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 */
6 #include "git-compat-util.h"
8 static void report(const char *prefix, const char *err, va_list params)
10 fputs(prefix, stderr);
11 vfprintf(stderr, err, params);
12 fputs("\n", stderr);
15 static NORETURN void usage_builtin(const char *err)
17 fprintf(stderr, "usage: %s\n", err);
18 exit(129);
21 static NORETURN void die_builtin(const char *err, va_list params)
23 report("fatal: ", err, params);
24 exit(128);
27 static void error_builtin(const char *err, va_list params)
29 report("error: ", err, params);
33 /* If we are in a dlopen()ed .so write to a global variable would segfault
34 * (ugh), so keep things static. */
35 static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
36 static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;
37 static void (*error_routine)(const char *err, va_list params) = error_builtin;
39 void set_usage_routine(void (*routine)(const char *err) NORETURN)
41 usage_routine = routine;
44 void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
46 die_routine = routine;
49 void set_error_routine(void (*routine)(const char *err, va_list params))
51 error_routine = routine;
55 void usage(const char *err)
57 usage_routine(err);
60 void die(const char *err, ...)
62 va_list params;
64 va_start(params, err);
65 die_routine(err, params);
66 va_end(params);
69 int error(const char *err, ...)
71 va_list params;
73 va_start(params, err);
74 error_routine(err, params);
75 va_end(params);
76 return -1;