1 /*
2 * usage.c
3 *
4 * Various reporting routines.
5 * Originally copied from GIT source.
6 *
7 * Copyright (C) Linus Torvalds, 2005
8 */
9 #include "util.h"
10
report(const char * prefix,const char * err,va_list params)11 static void report(const char *prefix, const char *err, va_list params)
12 {
13 char msg[1024];
14 vsnprintf(msg, sizeof(msg), err, params);
15 fprintf(stderr, " %s%s\n", prefix, msg);
16 }
17
usage_builtin(const char * err)18 static NORETURN void usage_builtin(const char *err)
19 {
20 fprintf(stderr, "\n Usage: %s\n", err);
21 exit(129);
22 }
23
die_builtin(const char * err,va_list params)24 static NORETURN void die_builtin(const char *err, va_list params)
25 {
26 report(" Fatal: ", err, params);
27 exit(128);
28 }
29
error_builtin(const char * err,va_list params)30 static void error_builtin(const char *err, va_list params)
31 {
32 report(" Error: ", err, params);
33 }
34
warn_builtin(const char * warn,va_list params)35 static void warn_builtin(const char *warn, va_list params)
36 {
37 report(" Warning: ", warn, params);
38 }
39
40 /* If we are in a dlopen()ed .so write to a global variable would segfault
41 * (ugh), so keep things static. */
42 static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
43 static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;
44 static void (*error_routine)(const char *err, va_list params) = error_builtin;
45 static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
46
set_die_routine(void (* routine)(const char * err,va_list params)NORETURN)47 void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
48 {
49 die_routine = routine;
50 }
51
usage(const char * err)52 void usage(const char *err)
53 {
54 usage_routine(err);
55 }
56
die(const char * err,...)57 void die(const char *err, ...)
58 {
59 va_list params;
60
61 va_start(params, err);
62 die_routine(err, params);
63 va_end(params);
64 }
65
error(const char * err,...)66 int error(const char *err, ...)
67 {
68 va_list params;
69
70 va_start(params, err);
71 error_routine(err, params);
72 va_end(params);
73 return -1;
74 }
75
warning(const char * warn,...)76 void warning(const char *warn, ...)
77 {
78 va_list params;
79
80 va_start(params, warn);
81 warn_routine(warn, params);
82 va_end(params);
83 }
84