*
* Copyright (c) 1994, Regents of the University of California
*
- * $Id: stringinfo.c,v 1.21 1999/08/31 01:28:25 tgl Exp $
+ * $Id: stringinfo.c,v 1.22 1999/09/08 16:31:38 tgl Exp $
*
*-------------------------------------------------------------------------
*/
nprinted = vsnprintf(str->data + str->len, avail,
fmt, args);
va_end(args);
- if (nprinted < avail-1)
+ /*
+ * Note: some versions of vsnprintf return the number of chars
+ * actually stored, but at least one returns -1 on failure.
+ * Be conservative about believing whether the print worked.
+ */
+ if (nprinted >= 0 && nprinted < avail-1)
{
/* Success. Note nprinted does not include trailing null. */
str->len += nprinted;