Although the EFI specification enforces support for FAT ESP, it's free
for EFI implementations to implement support for ESPs with other formats
(e.g. ext4, ntfs, etc), and at least U-Boot EFI will support ext4 ESP if
U-Boot is built with ext4 support. In some situations a GRUB
installation on such a non-FAT ESP could be useful (e.g. a NTFS-based
USB disk that can dual boot a Windows installation media and a Linux
LiveCD).
As this is advanced and implementation-dependent behavior, let
grub-install allow this kind of installation, but only when --force is
specified.
Signed-off-by: Icenowy Zheng <u...@icenowy.me>
---
util/grub-install.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/util/grub-install.c b/util/grub-install.c
index d601c3e8d..1f5d58b2b 100644
--- a/util/grub-install.c
+++ b/util/grub-install.c
@@ -1092,7 +1092,15 @@ main (int argc, char *argv[])
efidir_is_mac = 1;
if (!efidir_is_mac && grub_strcmp (fs->name, "fat") != 0)
- grub_util_error (_("%s doesn't look like an EFI partition"), efidir);
+ {
+ if (force)
+ grub_util_warn (_
+ ("%s doesn't look like an EFI partition, system may
not boot"),
+ efidir);
+ else
+ grub_util_error (_("%s doesn't look like an EFI partition"),
+ efidir);
+ }
/* The EFI specification requires that an EFI System Partition must
contain an "EFI" subdirectory, and that OS loaders are stored in
--
2.35.1
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