X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=lib%2Fvsprintf.c;h=0172902412613025213c07e7758af9492e2bd761;hb=d3f9882cca84a7cb67a19bbc597356b49896b8c2;hp=bed7229378f2da073be0c25eda0a30bf07146380;hpb=d120cfb544ed6161b9d32fb6c4648c471807ee6b;p=powerpc.git

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index bed7229378..0172902412 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -247,12 +247,12 @@ static char * number(char * buf, char * end, unsigned long long num, int base, i
  * be generated for the given input, excluding the trailing
  * '\0', as per ISO C99. If you want to have the exact
  * number of characters written into @buf as return value
- * (not including the trailing '\0'), use vscnprintf. If the
+ * (not including the trailing '\0'), use vscnprintf(). If the
  * return is greater than or equal to @size, the resulting
  * string is truncated.
  *
  * Call this function if you are already dealing with a va_list.
- * You probably want snprintf instead.
+ * You probably want snprintf() instead.
  */
 int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 {
@@ -509,7 +509,7 @@ EXPORT_SYMBOL(vsnprintf);
  * returns 0.
  *
  * Call this function if you are already dealing with a va_list.
- * You probably want scnprintf instead.
+ * You probably want scnprintf() instead.
  */
 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
 {
@@ -554,8 +554,7 @@ EXPORT_SYMBOL(snprintf);
  * @...: Arguments for the format string
  *
  * The return value is the number of characters written into @buf not including
- * the trailing '\0'. If @size is <= 0 the function returns 0. If the return is
- * greater than or equal to @size, the resulting string is truncated.
+ * the trailing '\0'. If @size is <= 0 the function returns 0.
  */
 
 int scnprintf(char * buf, size_t size, const char *fmt, ...)
@@ -577,11 +576,11 @@ EXPORT_SYMBOL(scnprintf);
  * @args: Arguments for the format string
  *
  * The function returns the number of characters written
- * into @buf. Use vsnprintf or vscnprintf in order to avoid
+ * into @buf. Use vsnprintf() or vscnprintf() in order to avoid
  * buffer overflows.
  *
  * Call this function if you are already dealing with a va_list.
- * You probably want sprintf instead.
+ * You probably want sprintf() instead.
  */
 int vsprintf(char *buf, const char *fmt, va_list args)
 {
@@ -597,7 +596,7 @@ EXPORT_SYMBOL(vsprintf);
  * @...: Arguments for the format string
  *
  * The function returns the number of characters written
- * into @buf. Use snprintf or scnprintf in order to avoid
+ * into @buf. Use snprintf() or scnprintf() in order to avoid
  * buffer overflows.
  */
 int sprintf(char * buf, const char *fmt, ...)
@@ -826,6 +825,17 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
 			break;
 		str = next;
 	}
+
+	/*
+	 * Now we've come all the way through so either the input string or the
+	 * format ended. In the former case, there can be a %n at the current
+	 * position in the format that needs to be filled.
+	 */
+	if (*fmt == '%' && *(fmt + 1) == 'n') {
+		int *p = (int *)va_arg(args, int *);
+		*p = str - buf;
+	}
+
 	return num;
 }
 
@@ -852,23 +862,35 @@ 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);