/* * usage.c * * Various reporting routines. * Originally copied from GIT source. * * Copyright (C) Linus Torvalds, 2005 */#include "util.h"#include "debug.h" static void report(const char *prefix, const char *err, va_list params){	char msg[1024];	vsnprintf(msg, sizeof(msg), err, params);	fprintf(stderr, " %s%s\n", prefix, msg);} static NORETURN void usage_builtin(const char *err){	fprintf(stderr, "\n Usage: %s\n", err);	exit(129);} static NORETURN void die_builtin(const char *err, va_list params){	report(" Fatal: ", err, params);	exit(128);} static void error_builtin(const char *err, va_list params){	report(" Error: ", err, params);} static void warn_builtin(const char *warn, va_list params){	report(" Warning: ", warn, params);} /* If we are in a dlopen()ed .so write to a global variable would segfault * (ugh), so keep things static. */static void (*usage_routine)(const char *err) NORETURN = usage_builtin;static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;static void (*error_routine)(const char *err, va_list params) = error_builtin;static void (*warn_routine)(const char *err, va_list params) = warn_builtin; void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN){	die_routine = routine;} void usage(const char *err){	usage_routine(err);} void die(const char *err, ...){	va_list params; 	va_start(params, err);	die_routine(err, params);	va_end(params);} int error(const char *err, ...){	va_list params; 	va_start(params, err);	error_routine(err, params);	va_end(params);	return -1;} void warning(const char *warn, ...){	va_list params; 	va_start(params, warn);	warn_routine(warn, params);	va_end(params);}