grub-install crash on GNU/Hurd

[Samuel Thibault]

Hello,

grub-install crashes on GNU/Hurd on the stat call in probe():

  if (print == PRINT_FS)
    {
      struct stat st;

      stat (path, &st);

      if (S_ISREG (st.st_mode))

because when grub-probe is passed --device /dev/hd0, path is NULL.
This doesn't get noticed on Linux because it returns EFAULT instead of
crashing, and by luck S_ISREG() is false.

Do people agree on the attached patch, i.e. check that the path is
readable only if --device was not given?

Samuel

patch
Description: Text document