File 0002-grub-install-Avoid-incompleted-install-on-i386-pc.patch of Package grub2.20869

From 4cf2e774557c782aa7156b2261d603212b24a64c Mon Sep 17 00:00:00 2001
From: Michael Chang <mchang@suse.com>
Date: Sat, 26 Sep 2020 20:29:40 +0800
Subject: [PATCH 2/2] grub-install: Avoid incompleted install on i386-pc

If any error happens between grub_install_copy_files() and
grub_util_bios_setup(), the system would become unbootable with error
like undefined symbol as a result of incompleted install that leaves
behind images on disk from different build to the modules on /boot.

This patch makes grub_install_copy_files() an adjecent call to
grub_util_bios_setup() to minimize the risk of running into any error in
between that would abort the process.

V1:
  * Create platform directory, /boot/grub2/i386-pc, which is required to
    have existed in the process of setting up prefix for the core.img.
    This fixed "failed to get canonical path of `/boot/grub2/i386-pc`"
    error during grub-install.

V2: Do not clean up core.img and boot.img in i386-pc platform directory.
    The core.img is required by blocklist install that will load it from
    platform directory. Both files can be used by grub2-bios-setup to
    reinstall images to disk made by previous grub2-install.

Signed-off-by: Michael Chang <mchang@suse.com>
---
 util/grub-install.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

Index: grub-2.04/util/grub-install.c
===================================================================
--- grub-2.04.orig/util/grub-install.c
+++ grub-2.04/util/grub-install.c
@@ -1340,8 +1340,9 @@ main (int argc, char *argv[])
 	}
     }
 
-  grub_install_copy_files (grub_install_source_directory,
-			   grubdir, platform);
+  if (platform != GRUB_INSTALL_PLATFORM_I386_PC)
+    grub_install_copy_files (grub_install_source_directory,
+			     grubdir, platform);
 
   char *envfile = grub_util_path_concat (2, grubdir, "grubenv");
   if (!grub_util_is_regular (envfile))
@@ -1430,6 +1431,7 @@ main (int argc, char *argv[])
   {
     char *t = grub_util_path_concat (2, grubdir,
 				   platname);
+    grub_install_mkdir_p (t);
     platdir = grub_canonicalize_file_name (t);
     if (!platdir)
       grub_util_error (_("failed to get canonical path of `%s'"),
@@ -1964,6 +1966,8 @@ main (int argc, char *argv[])
 				  fs_probe, allow_floppy, add_rs_codes,
 				  warn_short_mbr_gap);
 	  }
+	grub_install_copy_files (grub_install_source_directory,
+				 grubdir, platform);
 	break;
       }
     case GRUB_INSTALL_PLATFORM_SPARC64_IEEE1275:
Index: grub-2.04/util/grub-install-common.c
===================================================================
--- grub-2.04.orig/util/grub-install-common.c
+++ grub-2.04/util/grub-install-common.c
@@ -190,18 +190,28 @@ clean_grub_dir (const char *di)
 {
   grub_util_fd_dir_t d;
   grub_util_fd_dirent_t de;
+  int skip_img = 0;
 
   d = grub_util_fd_opendir (di);
   if (!d)
     grub_util_error (_("cannot open directory `%s': %s"),
 		     di, grub_util_fd_strerror ());
 
+  {
+    char *plat_i386_pc = grub_install_get_platform_name (GRUB_INSTALL_PLATFORM_I386_PC);
+    const char *plat = strrchr (di, '/');
+
+    if (plat && strcmp (plat + 1, plat_i386_pc) == 0)
+      skip_img = 1;
+    free (plat_i386_pc);
+  }
+
   while ((de = grub_util_fd_readdir (d)))
     {
       const char *ext = strrchr (de->d_name, '.');
       if ((ext && (strcmp (ext, ".mod") == 0
 		   || strcmp (ext, ".lst") == 0
-		   || strcmp (ext, ".img") == 0
+		   || (!skip_img && strcmp (ext, ".img") == 0)
 		   || strcmp (ext, ".mo") == 0)
 	   && strcmp (de->d_name, "menu.lst") != 0)
 	  || strcmp (de->d_name, "efiemu32.o") == 0