Add %X to grub_vsnprintf_real and friends

This is needed for UEFI Boot* variables, which the standard says are
named using upper-case hexadecimal.

Signed-off-by: Colin Watson <cjwatson@ubuntu.com>
Bug-Debian: https://bugs.debian.org/891434
Forwarded: https://lists.gnu.org/archive/html/grub-devel/2019-03/msg00121.html
Last-Update: 2019-03-23

Patch-Name: vsnprintf-upper-case-hex.patch

diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c
index 3b633d51f4c63e2983e8b3419dc057437224fb93..18cad5803be306cc57f300d0fcda3bbcc13a77e1 100644 (file)
--- a/grub-core/kern/misc.c
+++ b/grub-core/kern/misc.c
@@ -588,7 +588,7 @@ grub_divmod64 (grub_uint64_t n, grub_uint64_t d, grub_uint64_t *r)
 static inline char *
 grub_lltoa (char *str, int c, unsigned long long n)
 {
-  unsigned base = (c == 'x') ? 16 : 10;
+  unsigned base = (c == 'x' || c == 'X') ? 16 : 10;
   char *p;
 
   if ((long long) n < 0 && c == 'd')
@@ -603,7 +603,7 @@ grub_lltoa (char *str, int c, unsigned long long n)
     do
       {
        unsigned d = (unsigned) (n & 0xf);
-       *p++ = (d > 9) ? d + 'a' - 10 : d + '0';
+       *p++ = (d > 9) ? d + ((c == 'x') ? 'a' : 'A') - 10 : d + '0';
       }
     while (n >>= 4);
   else
@@ -676,6 +676,7 @@ parse_printf_args (const char *fmt0, struct printf_args *args,
        {
        case 'p':
        case 'x':
+       case 'X':
        case 'u':
        case 'd':
        case 'c':
@@ -762,6 +763,7 @@ parse_printf_args (const char *fmt0, struct printf_args *args,
       switch (c)
        {
        case 'x':
+       case 'X':
        case 'u':
          args->ptr[curn].type = UNSIGNED_INT + longfmt;
          break;
@@ -900,6 +902,7 @@ grub_vsnprintf_real (char *str, grub_size_t max_len, const char *fmt0,
          c = 'x';
          /* Fall through. */
        case 'x':
+       case 'X':
        case 'u':
        case 'd':
          {