ref: 1b7e120c090af2f8f0e17a664ba0e5e5d7f261a0
dir: /sys/src/cmd/auth/lib/error.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "authcmdlib.h"
void
error(char *fmt, ...)
{
char buf[8192], *s;
va_list arg;
s = buf;
s += sprint(s, "%s: ", argv0);
va_start(arg, fmt);
s = vseprint(s, buf + sizeof(buf), fmt, arg);
va_end(arg);
*s++ = '\n';
write(2, buf, s - buf);
exits(buf);
}