Add kvasprintf() (11443ec7) · Commits · 戴 / test

include/linux/kernel.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -121,6 +121,7 @@ extern int vscnprintf(char buf, size_t size, const char fmt, va_list args)
		__attribute__ ((format (printf, 3, 0)));
		extern char kasprintf(gfp_t gfp, const char fmt, ...)
		__attribute__ ((format (printf, 2, 3)));
		extern char kvasprintf(gfp_t gfp, const char fmt, va_list args);

		extern int sscanf(const char , const char , ...)
		__attribute__ ((format (scanf, 2, 3)));

+19 −7

Original line number	Diff line number	Diff line
		@@ -851,23 +851,35 @@ EXPORT_SYMBOL(sscanf);


		/* Simplified asprintf. */
		char kasprintf(gfp_t gfp, const char fmt, ...)
		char kvasprintf(gfp_t gfp, const char fmt, va_list ap)
		{
		va_list ap;
		unsigned int len;
		char *p;
		va_list aq;

		va_start(ap, fmt);
		len = vsnprintf(NULL, 0, fmt, ap);
		va_end(ap);
		va_copy(aq, ap);
		len = vsnprintf(NULL, 0, fmt, aq);
		va_end(aq);

		p = kmalloc(len+1, gfp);
		if (!p)
		return NULL;
		va_start(ap, fmt);

		vsnprintf(p, len+1, fmt, ap);
		va_end(ap);

		return p;
		}
		EXPORT_SYMBOL(kvasprintf);

		char kasprintf(gfp_t gfp, const char fmt, ...)
		{
		va_list ap;
		char *p;

		va_start(ap, fmt);
		p = kvasprintf(gfp, fmt, ap);
		va_end(ap);

		return p;
		}
		EXPORT_SYMBOL(kasprintf);