+static volatile int test_status;
+
+#define error(...) test_error(__FILE__, __LINE__, __VA_ARGS__)
+
+static int test_error(const char *fn, int l, const char *s, ...)
+{
+ va_list ap;
+ char buf[512];
+ int n, k;
+
+ test_status = 1;
+ n = snprintf(buf, sizeof buf, "ERROR %s:%d: ", fn, l);
+ if (n < 0)
+ n = 0;
+ else if (n >= sizeof buf)
+ n = sizeof buf;
+ va_start(ap, s);
+ k = vsnprintf(buf + n, sizeof buf - n, s, ap);
+ va_end(ap);
+ if (k < 0)
+ k = 0;
+ else if (k >= sizeof buf - n) {
+ k = sizeof buf - n;
+ buf[n + k - 1] = '\n';
+ buf[n + k - 2] = '.';
+ buf[n + k - 3] = '.';
+ buf[n + k - 4] = '.';
+ }
+ return write(1, buf, n + k);
+}