tgupdate: merge girocco base into girocco
[git/gitweb.git] / usage.c
blob17f52c1b5ce631eed1cdf3447d80e7223a2e6f01
1 /*
2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 */
6 #include "git-compat-util.h"
7 #include "cache.h"
9 static FILE *error_handle;
10 static int tweaked_error_buffering;
12 void vreportf(const char *prefix, const char *err, va_list params)
14 FILE *fh = error_handle ? error_handle : stderr;
16 fflush(fh);
17 if (!tweaked_error_buffering) {
18 setvbuf(fh, NULL, _IOLBF, 0);
19 tweaked_error_buffering = 1;
22 fputs(prefix, fh);
23 vfprintf(fh, err, params);
24 fputc('\n', fh);
27 static NORETURN void usage_builtin(const char *err, va_list params)
29 vreportf("usage: ", err, params);
30 exit(129);
33 static NORETURN void die_builtin(const char *err, va_list params)
35 vreportf("fatal: ", err, params);
36 exit(128);
39 static void error_builtin(const char *err, va_list params)
41 vreportf("error: ", err, params);
44 static void warn_builtin(const char *warn, va_list params)
46 vreportf("warning: ", warn, params);
49 static int die_is_recursing_builtin(void)
51 static int dying;
52 return dying++;
55 /* If we are in a dlopen()ed .so write to a global variable would segfault
56 * (ugh), so keep things static. */
57 static NORETURN_PTR void (*usage_routine)(const char *err, va_list params) = usage_builtin;
58 static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin;
59 static void (*error_routine)(const char *err, va_list params) = error_builtin;
60 static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
61 static int (*die_is_recursing)(void) = die_is_recursing_builtin;
63 void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params))
65 die_routine = routine;
68 void set_error_routine(void (*routine)(const char *err, va_list params))
70 error_routine = routine;
73 void (*get_error_routine(void))(const char *err, va_list params)
75 return error_routine;
78 void set_warn_routine(void (*routine)(const char *warn, va_list params))
80 warn_routine = routine;
83 void (*get_warn_routine(void))(const char *warn, va_list params)
85 return warn_routine;
88 void set_die_is_recursing_routine(int (*routine)(void))
90 die_is_recursing = routine;
93 void set_error_handle(FILE *fh)
95 error_handle = fh;
96 tweaked_error_buffering = 0;
99 void NORETURN usagef(const char *err, ...)
101 va_list params;
103 va_start(params, err);
104 usage_routine(err, params);
105 va_end(params);
108 void NORETURN usage(const char *err)
110 usagef("%s", err);
113 void NORETURN die(const char *err, ...)
115 va_list params;
117 if (die_is_recursing()) {
118 fputs("fatal: recursion detected in die handler\n", stderr);
119 exit(128);
122 va_start(params, err);
123 die_routine(err, params);
124 va_end(params);
127 static const char *fmt_with_err(char *buf, int n, const char *fmt)
129 char str_error[256], *err;
130 int i, j;
132 err = strerror(errno);
133 for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) {
134 if ((str_error[j++] = err[i++]) != '%')
135 continue;
136 if (j < sizeof(str_error) - 1) {
137 str_error[j++] = '%';
138 } else {
139 /* No room to double the '%', so we overwrite it with
140 * '\0' below */
141 j--;
142 break;
145 str_error[j] = 0;
146 snprintf(buf, n, "%s: %s", fmt, str_error);
147 return buf;
150 void NORETURN die_errno(const char *fmt, ...)
152 char buf[1024];
153 va_list params;
155 if (die_is_recursing()) {
156 fputs("fatal: recursion detected in die_errno handler\n",
157 stderr);
158 exit(128);
161 va_start(params, fmt);
162 die_routine(fmt_with_err(buf, sizeof(buf), fmt), params);
163 va_end(params);
166 #undef error_errno
167 int error_errno(const char *fmt, ...)
169 char buf[1024];
170 va_list params;
172 va_start(params, fmt);
173 error_routine(fmt_with_err(buf, sizeof(buf), fmt), params);
174 va_end(params);
175 return -1;
178 #undef error
179 int error(const char *err, ...)
181 va_list params;
183 va_start(params, err);
184 error_routine(err, params);
185 va_end(params);
186 return -1;
189 void warning_errno(const char *warn, ...)
191 char buf[1024];
192 va_list params;
194 va_start(params, warn);
195 warn_routine(fmt_with_err(buf, sizeof(buf), warn), params);
196 va_end(params);
199 void warning(const char *warn, ...)
201 va_list params;
203 va_start(params, warn);
204 warn_routine(warn, params);
205 va_end(params);