gitweb: use new Git::Repo API, and add optional caching
[git/gitweb-caching.git] / usage.c
bloba5fc4ec5fae66823266862fa0254474696c220e6
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 char msg[256];
11 vsnprintf(msg, sizeof(msg), err, params);
12 fprintf(stderr, "%s%s\n", prefix, msg);
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);
32 static void warn_builtin(const char *warn, va_list params)
34 report("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 void (*usage_routine)(const char *err) NORETURN = usage_builtin;
40 static void (*die_routine)(const char *err, va_list params) NORETURN = 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_usage_routine(void (*routine)(const char *err) NORETURN)
46 usage_routine = routine;
49 void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
51 die_routine = routine;
54 void set_error_routine(void (*routine)(const char *err, va_list params))
56 error_routine = routine;
59 void set_warn_routine(void (*routine)(const char *warn, va_list params))
61 warn_routine = routine;
65 void usage(const char *err)
67 usage_routine(err);
70 void die(const char *err, ...)
72 va_list params;
74 va_start(params, err);
75 die_routine(err, params);
76 va_end(params);
79 int error(const char *err, ...)
81 va_list params;
83 va_start(params, err);
84 error_routine(err, params);
85 va_end(params);
86 return -1;
89 void warning(const char *warn, ...)
91 va_list params;
93 va_start(params, warn);
94 warn_routine(warn, params);
95 va_end(params);