Merge commit 'refs/top-bases/girocco' into girocco
[git/repo.git] / usage.c
blob24f5fc00c2501c1a1cc317f0b74b458ea50c8b0e
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_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
46 die_routine = routine;
49 void usage(const char *err)
51 usage_routine(err);
54 void die(const char *err, ...)
56 va_list params;
58 va_start(params, err);
59 die_routine(err, params);
60 va_end(params);
63 int error(const char *err, ...)
65 va_list params;
67 va_start(params, err);
68 error_routine(err, params);
69 va_end(params);
70 return -1;
73 void warning(const char *warn, ...)
75 va_list params;
77 va_start(params, warn);
78 warn_routine(warn, params);
79 va_end(params);