usage.c
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/*
* 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);
}