/* The die() declaration is stolen from git-compat-util.h */
void die(const char *err, ...) __attribute__((format(printf, 1, 2)));

#include <stdarg.h>
#include <string.h>
#include <ctype.h>

/**
 * Expand to support varargs like a regular printf
 */

static void
die_routine(const char *err, va_list params)
{
	char msg[4096];
	char *p, *pend;
	pend = msg + sizeof(msg);
	memcpy(msg, "fatal: ", 7); /* FIXME: make configurable */
	p = msg + 7;
	if (vsnprintf(p, (size_t)(pend - p), err, params) < 0)
		*p = '\0'; /* vsnprintf() failed, clip at prefix */
	for (; p != pend - 1 && *p; p++)
		if (iscntrl(*p) && *p != '\t' && *p != '\n')
			*p = '?';
	*(p++) = '\n';
	*(p++) = '\0';
	fflush(stderr);
	fprintf(stderr, msg); /* git has write_in_full(2, msg, p - msg) */
}

die(const char *msg)

die(const char *err, ...)

	fprintf(stderr, msg);
	exit(57);

	va_list params;
	va_start(params, err);
	die_routine(err, params);
	va_end(params);
	exit(128);