Hi,
When using the read command under grub-emu, the resulting value read
(present in the environment variable) includes a time-dependent number of 0xff
characters + the input that the user made. I tracked it down to
grub_ncurses_getkey(), which times out after 100ms and causes
grub_ncurses_getkey to return -1 instead of GRUB_TERM_NO_KEY, which causes
grub_getkey() to return -1 instead of blocking until it has real input.
My suggestion would be to change grub_ncurses_getkey to return
GRUB_TERM_NO_KEY in the ERR case:
static int
grub_ncurses_getkey (struct grub_term_input *term __attribute__ ((unused)))
{
int c;
wtimeout (stdscr, 100);
c = getch ();
switch (c)
{
case ERR:
< return -1;
return GRUB_TERM_NO_KEY;
--S
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