grub4dos: \ character is converted to \\ when calling grub.exe from grub2

[steve6375]

menuentry "Test file \A B\t.iso" --class=custom {
set cmd="set I=/A\ B/t.iso; pause %I%"
linux16 (hd0,1)/grub.exe --config-file=${cmd};
}

If specifying a grub4dos path containing spaces, an extra \ character is added which causes the filename to be wrong.

[a1ive]

Maybe this backslash is added by grub2?
https://github.com/a1ive/grub/blob/5b20b2f521f32e8b170581854cc7c80f0c0bc159/grub-core/lib/cmdline.c#L113-L114

[steve6375]

Maybe - is there any way to prevent it?

[steve6375]

set cmd="set I=/A\ B/t.iso; echo !BAT > (md)0x300+1;echo -e set I=%I% >> (md)0x300+1; call (md)0x300+1; find --set-root %I%; map %I% (0xff);map --hook;chainloader (0xff);boot"
linux16 (hd0,1)/grub.exe --config-file=${cmd};

This will convert \\ to \ and seems to work.