gnu/packages/patches/grub-efi-fat-serial-number.patch

   1 Change 'grub-mkrescue' to honor the 'GRUB_FAT_SERIAL_NUMBER'
   2 environment variable.  That way, the caller can specify a fixed
   3 serial number (instead of the randomly chosen one) to create EFI
   4 images (the 'efi.img' file) that are reproducible bit-for-bit.
   5
   6 Patch by Ludovic Courtès <ludo@gnu.org>.
   7 Mangled (for GRUB 2.04) by Tobias Geerinckx-Rice <me@tobias.gr>.
   8
   9 --- grub-2.04/util/grub-mkrescue.c      2019-05-20 13:01:11.000000000 +0200
  10 +++ grub-2.04/util/grub-mkrescue.c      2019-07-08 23:57:36.912104652 +0200
  11 @@ -809,8 +809,15 @@
  12        free (efidir_efi_boot);
  13
  14        efiimgfat = grub_util_path_concat (2, iso9660_dir, "efi.img");
  15 -      rv = grub_util_exec ((const char * []) { "mformat", "-C", "-f", "2880", "-L", "16", "-i",
  16 -           efiimgfat, "::", NULL });
  17 +
  18 +      const char *fat_serial_number = getenv ("GRUB_FAT_SERIAL_NUMBER");
  19 +      const char *mformat_args[] =
  20 +       { "mformat", "-C", "-f", "2880", "-L", "16",
  21 +         fat_serial_number != NULL ? "-N" : "-C",
  22 +         fat_serial_number != NULL ? fat_serial_number : "-C",
  23 +         "-i", efiimgfat, "::", NULL };
  24 +
  25 +      rv = grub_util_exec (mformat_args);
  26        if (rv != 0)
  27         grub_util_error ("`%s` invocation failed\n", "mformat");
  28        rv = grub_util_exec ((const char * []) { "mcopy", "-s", "-i", efiimgfat, efidir_efi, "::/", NULL });