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chromium / external / github.com / git / git / refs/tags/v1.7.0.3 / . / usage.c
blob: 79856a2b9f5bc4603252cb10b471a0815416a617 [file] [log] [blame]
Linus Torvalds0fcfd162005-04-18 20:04:43[diff] [blame]1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
Junio C Hamano4050c0d2005-12-05 19:54:29[diff] [blame]6#include "git-compat-util.h"
Linus Torvalds0fcfd162005-04-18 20:04:43[diff] [blame]7
8static void report(const char *prefix, const char *err, va_list params)
9{
Björn Gustavsson625a8602009-11-22 21:19:53[diff] [blame]10 char msg[4096];
Nicolas Pitred048a962007-11-09 19:33:54[diff] [blame]11 vsnprintf(msg, sizeof(msg), err, params);
12 fprintf(stderr, "%s%s\n", prefix, msg);
Linus Torvalds0fcfd162005-04-18 20:04:43[diff] [blame]13}
14
Jonathan Nieder64b1cb72009-11-09 15:05:02[diff] [blame]15static NORETURN void usage_builtin(const char *err, va_list params)
Linus Torvalds0fcfd162005-04-18 20:04:43[diff] [blame]16{
Jonathan Nieder64b1cb72009-11-09 15:05:02[diff] [blame]17 report("usage: ", err, params);
Linus Torvalds5d1a5c02005-10-01 20:24:27[diff] [blame]18 exit(129);
Linus Torvalds0fcfd162005-04-18 20:04:43[diff] [blame]19}
20
Junio C Hamanoce88ac52006-06-24 05:44:33[diff] [blame]21static NORETURN void die_builtin(const char *err, va_list params)
Petr Baudis39a3f5e2006-06-24 02:34:38[diff] [blame]22{
23 report("fatal: ", err, params);
24 exit(128);
25}
26
Junio C Hamanoce88ac52006-06-24 05:44:33[diff] [blame]27static void error_builtin(const char *err, va_list params)
Petr Baudis39a3f5e2006-06-24 02:34:38[diff] [blame]28{
29 report("error: ", err, params);
30}
31
Shawn O. Pearcefa39b6b2006-12-22 00:48:32[diff] [blame]32static void warn_builtin(const char *warn, va_list params)
33{
34 report("warning: ", warn, params);
35}
Petr Baudis39a3f5e2006-06-24 02:34:38[diff] [blame]36
37/* If we are in a dlopen()ed .so write to a global variable would segfault
38 * (ugh), so keep things static. */
Jonathan Nieder64b1cb72009-11-09 15:05:02[diff] [blame]39static NORETURN_PTR void (*usage_routine)(const char *err, va_list params) = usage_builtin;
Erik Faye-Lund18660bc2009-09-30 18:05:50[diff] [blame]40static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin;
Petr Baudis39a3f5e2006-06-24 02:34:38[diff] [blame]41static void (*error_routine)(const char *err, va_list params) = error_builtin;
Shawn O. Pearcefa39b6b2006-12-22 00:48:32[diff] [blame]42static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
Petr Baudis39a3f5e2006-06-24 02:34:38[diff] [blame]43
Erik Faye-Lund18660bc2009-09-30 18:05:50[diff] [blame]44void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params))
Petr Baudis39a3f5e2006-06-24 02:34:38[diff] [blame]45{
46 die_routine = routine;
47}
48
Jonathan Nieder64b1cb72009-11-09 15:05:02[diff] [blame]49void 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
Petr Baudis39a3f5e2006-06-24 02:34:38[diff] [blame]58void usage(const char *err)
59{
Jonathan Nieder64b1cb72009-11-09 15:05:02[diff] [blame]60 usagef("%s", err);
Petr Baudis39a3f5e2006-06-24 02:34:38[diff] [blame]61}
62
Linus Torvalds0fcfd162005-04-18 20:04:43[diff] [blame]63void die(const char *err, ...)
64{
65 va_list params;
66
67 va_start(params, err);
Petr Baudis39a3f5e2006-06-24 02:34:38[diff] [blame]68 die_routine(err, params);
Linus Torvalds0fcfd162005-04-18 20:04:43[diff] [blame]69 va_end(params);
Linus Torvalds0fcfd162005-04-18 20:04:43[diff] [blame]70}
71
Thomas Rastb8750362009-06-27 15:58:44[diff] [blame]72void die_errno(const char *fmt, ...)
73{
74 va_list params;
75 char fmt_with_err[1024];
Junio C Hamanof8b5a8e2009-06-27 15:58:45[diff] [blame]76 char str_error[256], *err;
77 int i, j;
Thomas Rastb8750362009-06-27 15:58:44[diff] [blame]78
Junio C Hamanof8b5a8e2009-06-27 15:58:45[diff] [blame]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);
Thomas Rastb8750362009-06-27 15:58:44[diff] [blame]94
95 va_start(params, fmt);
96 die_routine(fmt_with_err, params);
97 va_end(params);
98}
99
Linus Torvalds0fcfd162005-04-18 20:04:43[diff] [blame]100int error(const char *err, ...)
101{
102 va_list params;
103
104 va_start(params, err);
Petr Baudis39a3f5e2006-06-24 02:34:38[diff] [blame]105 error_routine(err, params);
Linus Torvalds0fcfd162005-04-18 20:04:43[diff] [blame]106 va_end(params);
107 return -1;
108}
Shawn O. Pearcefa39b6b2006-12-22 00:48:32[diff] [blame]109
Theodore Ts'o46efd2d2007-03-30 23:07:05[diff] [blame]110void warning(const char *warn, ...)
Shawn O. Pearcefa39b6b2006-12-22 00:48:32[diff] [blame]111{
112 va_list params;
113
114 va_start(params, warn);
115 warn_routine(warn, params);
116 va_end(params);
117}