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Linus Torvalds0fcfd162005-04-18 13:04:43 -07001/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
Junio C Hamano4050c0d2005-12-05 11:54:29 -08006#include "git-compat-util.h"
Clemens Buchacher3bc41812011-07-27 23:32:34 +02007#include "cache.h"
Linus Torvalds0fcfd162005-04-18 13:04:43 -07008
Johannes Sixtebaa79f2010-03-06 16:40:39 +01009void vreportf(const char *prefix, const char *err, va_list params)
Linus Torvalds0fcfd162005-04-18 13:04:43 -070010{
Björn Gustavsson625a8602009-11-22 22:19:53 +010011 char msg[4096];
Nicolas Pitred048a962007-11-09 14:33:54 -050012 vsnprintf(msg, sizeof(msg), err, params);
13 fprintf(stderr, "%s%s\n", prefix, msg);
Linus Torvalds0fcfd162005-04-18 13:04:43 -070014}
15
Clemens Buchacher3bc41812011-07-27 23:32:34 +020016void vwritef(int fd, const char *prefix, const char *err, va_list params)
17{
18 char msg[4096];
19 int len = vsnprintf(msg, sizeof(msg), err, params);
20 if (len > sizeof(msg))
21 len = sizeof(msg);
22
23 write_in_full(fd, prefix, strlen(prefix));
24 write_in_full(fd, msg, len);
25 write_in_full(fd, "\n", 1);
26}
27
Jonathan Nieder64b1cb72009-11-09 09:05:02 -060028static NORETURN void usage_builtin(const char *err, va_list params)
Linus Torvalds0fcfd162005-04-18 13:04:43 -070029{
Johannes Sixtebaa79f2010-03-06 16:40:39 +010030 vreportf("usage: ", err, params);
Linus Torvalds5d1a5c02005-10-01 13:24:27 -070031 exit(129);
Linus Torvalds0fcfd162005-04-18 13:04:43 -070032}
33
Junio C Hamanoce88ac52006-06-23 22:44:33 -070034static NORETURN void die_builtin(const char *err, va_list params)
Petr Baudis39a3f5e2006-06-24 04:34:38 +020035{
Johannes Sixtebaa79f2010-03-06 16:40:39 +010036 vreportf("fatal: ", err, params);
Petr Baudis39a3f5e2006-06-24 04:34:38 +020037 exit(128);
38}
39
Junio C Hamanoce88ac52006-06-23 22:44:33 -070040static void error_builtin(const char *err, va_list params)
Petr Baudis39a3f5e2006-06-24 04:34:38 +020041{
Johannes Sixtebaa79f2010-03-06 16:40:39 +010042 vreportf("error: ", err, params);
Petr Baudis39a3f5e2006-06-24 04:34:38 +020043}
44
Shawn O. Pearcefa39b6b2006-12-21 19:48:32 -050045static void warn_builtin(const char *warn, va_list params)
46{
Johannes Sixtebaa79f2010-03-06 16:40:39 +010047 vreportf("warning: ", warn, params);
Shawn O. Pearcefa39b6b2006-12-21 19:48:32 -050048}
Petr Baudis39a3f5e2006-06-24 04:34:38 +020049
Jeff Kingc19a4902013-04-16 15:46:22 -040050static int die_is_recursing_builtin(void)
51{
52 static int dying;
53 return dying++;
54}
55
Petr Baudis39a3f5e2006-06-24 04:34:38 +020056/* If we are in a dlopen()ed .so write to a global variable would segfault
57 * (ugh), so keep things static. */
Jonathan Nieder64b1cb72009-11-09 09:05:02 -060058static NORETURN_PTR void (*usage_routine)(const char *err, va_list params) = usage_builtin;
Erik Faye-Lund18660bc2009-09-30 18:05:50 +000059static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin;
Petr Baudis39a3f5e2006-06-24 04:34:38 +020060static void (*error_routine)(const char *err, va_list params) = error_builtin;
Shawn O. Pearcefa39b6b2006-12-21 19:48:32 -050061static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
Jeff Kingc19a4902013-04-16 15:46:22 -040062static int (*die_is_recursing)(void) = die_is_recursing_builtin;
Petr Baudis39a3f5e2006-06-24 04:34:38 +020063
Erik Faye-Lund18660bc2009-09-30 18:05:50 +000064void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params))
Petr Baudis39a3f5e2006-06-24 04:34:38 +020065{
66 die_routine = routine;
67}
68
Clemens Buchacher3bc41812011-07-27 23:32:34 +020069void set_error_routine(void (*routine)(const char *err, va_list params))
70{
71 error_routine = routine;
72}
73
Jeff Kingc19a4902013-04-16 15:46:22 -040074void set_die_is_recursing_routine(int (*routine)(void))
75{
76 die_is_recursing = routine;
77}
78
Stephen Boydc2e86ad2011-03-22 00:51:05 -070079void NORETURN usagef(const char *err, ...)
Jonathan Nieder64b1cb72009-11-09 09:05:02 -060080{
81 va_list params;
82
83 va_start(params, err);
84 usage_routine(err, params);
85 va_end(params);
86}
87
Stephen Boydc2e86ad2011-03-22 00:51:05 -070088void NORETURN usage(const char *err)
Petr Baudis39a3f5e2006-06-24 04:34:38 +020089{
Jonathan Nieder64b1cb72009-11-09 09:05:02 -060090 usagef("%s", err);
Petr Baudis39a3f5e2006-06-24 04:34:38 +020091}
92
Stephen Boydc2e86ad2011-03-22 00:51:05 -070093void NORETURN die(const char *err, ...)
Linus Torvalds0fcfd162005-04-18 13:04:43 -070094{
95 va_list params;
96
Jeff Kingc19a4902013-04-16 15:46:22 -040097 if (die_is_recursing()) {
Brandon Caseycd163d42012-11-14 17:45:52 -080098 fputs("fatal: recursion detected in die handler\n", stderr);
99 exit(128);
100 }
Brandon Caseycd163d42012-11-14 17:45:52 -0800101
Linus Torvalds0fcfd162005-04-18 13:04:43 -0700102 va_start(params, err);
Petr Baudis39a3f5e2006-06-24 04:34:38 +0200103 die_routine(err, params);
Linus Torvalds0fcfd162005-04-18 13:04:43 -0700104 va_end(params);
Linus Torvalds0fcfd162005-04-18 13:04:43 -0700105}
106
Stephen Boydc2e86ad2011-03-22 00:51:05 -0700107void NORETURN die_errno(const char *fmt, ...)
Thomas Rastb8750362009-06-27 17:58:44 +0200108{
109 va_list params;
110 char fmt_with_err[1024];
Junio C Hamanof8b5a8e2009-06-27 17:58:45 +0200111 char str_error[256], *err;
112 int i, j;
Thomas Rastb8750362009-06-27 17:58:44 +0200113
Jeff Kingc19a4902013-04-16 15:46:22 -0400114 if (die_is_recursing()) {
Brandon Caseycd163d42012-11-14 17:45:52 -0800115 fputs("fatal: recursion detected in die_errno handler\n",
116 stderr);
117 exit(128);
118 }
Brandon Caseycd163d42012-11-14 17:45:52 -0800119
Junio C Hamanof8b5a8e2009-06-27 17:58:45 +0200120 err = strerror(errno);
121 for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) {
122 if ((str_error[j++] = err[i++]) != '%')
123 continue;
124 if (j < sizeof(str_error) - 1) {
125 str_error[j++] = '%';
126 } else {
127 /* No room to double the '%', so we overwrite it with
128 * '\0' below */
129 j--;
130 break;
131 }
132 }
133 str_error[j] = 0;
134 snprintf(fmt_with_err, sizeof(fmt_with_err), "%s: %s", fmt, str_error);
Thomas Rastb8750362009-06-27 17:58:44 +0200135
136 va_start(params, fmt);
137 die_routine(fmt_with_err, params);
138 va_end(params);
139}
140
Jeff Kinge208f9c2012-12-15 12:37:36 -0500141#undef error
Linus Torvalds0fcfd162005-04-18 13:04:43 -0700142int error(const char *err, ...)
143{
144 va_list params;
145
146 va_start(params, err);
Petr Baudis39a3f5e2006-06-24 04:34:38 +0200147 error_routine(err, params);
Linus Torvalds0fcfd162005-04-18 13:04:43 -0700148 va_end(params);
149 return -1;
150}
Shawn O. Pearcefa39b6b2006-12-21 19:48:32 -0500151
Theodore Ts'o46efd2d2007-03-30 19:07:05 -0400152void warning(const char *warn, ...)
Shawn O. Pearcefa39b6b2006-12-21 19:48:32 -0500153{
154 va_list params;
155
156 va_start(params, warn);
157 warn_routine(warn, params);
158 va_end(params);
159}