> When "str >= end", necessary to reset 'str' to "end - 1", or the return > value will be larger than the real one, the callers which depend on the > return value, may cause memory overflow.
NAK. This is the documented (by both the function itself and the ANSI/ISO C standard) and desired return value: the number of bytes that *would* have been in the output string if the buffer were large enough. In particular, it is common to do: size = vsnprintf(NULL, 0, fmt, args) + 1; p = malloc(size, GFP_KERNEL); vsnprintf(p, size, fmt, args); You want vscnprintf. If you have a caller that needs the *actual* number of bytes written, use that. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
