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--- a/util/grub-setup.c
+++ b/util/grub-setup.c
@@ -141,12 +141,11 @@ write_rootdev (char *core_img, grub_devi
static void
setup (const char *dir,
const char *boot_file, const char *core_file,
- const char *dest, int force,
+ const char *root, const char *dest, int force,
int fs_probe, int allow_floppy)
{
char *boot_path, *core_path, *core_path_dev, *core_path_dev_full;
char *boot_img, *core_img;
- char *root = 0;
size_t boot_size, core_size;
grub_uint16_t core_sectors;
grub_device_t root_dev = 0, dest_dev, core_dev;
@@ -253,7 +252,10 @@ setup (const char *dir,
core_dev = dest_dev;
- {
+ if (root)
+ root_dev = grub_device_open(root);
+
+ if (!root_dev) {
char **root_devices = grub_guess_root_devices (dir);
char **cur;
int found = 0;
@@ -263,6 +265,8 @@ setup (const char *dir,
char *drive;
grub_device_t try_dev;
+ if (root_dev)
+ break;
drive = grub_util_get_grub_dev (*cur);
if (!drive)
continue;
@@ -956,6 +960,8 @@ static struct argp_option options[] = {
N_("install even if problems are detected"), 0},
{"skip-fs-probe",'s',0, 0,
N_("do not probe for filesystems in DEVICE"), 0},
+ {"root-device", 'r', N_("DEVICE"), 0,
+ N_("use DEVICE as the root device"), 0},
{"verbose", 'v', 0, 0, N_("print verbose messages."), 0},
{"allow-floppy", 'a', 0, 0,
/* TRANSLATORS: The potential breakage isn't limited to floppies but it's
@@ -993,6 +999,7 @@ struct arguments
char *core_file;
char *dir;
char *dev_map;
+ char *root_dev;
int force;
int fs_probe;
int allow_floppy;
@@ -1040,6 +1047,13 @@ argp_parser (int key, char *arg, struct
arguments->dev_map = xstrdup (arg);
break;
+ case 'r':
+ if (arguments->root_dev)
+ free (arguments->root_dev);
+
+ arguments->root_dev = xstrdup (arg);
+ break;
+
case 'f':
arguments->force = 1;
break;
@@ -1172,7 +1186,7 @@ main (int argc, char *argv[])
setup (arguments.dir ? : DEFAULT_DIRECTORY,
arguments.boot_file ? : DEFAULT_BOOT_FILE,
arguments.core_file ? : DEFAULT_CORE_FILE,
- dest_dev, arguments.force,
+ arguments.root_dev, dest_dev, arguments.force,
arguments.fs_probe, arguments.allow_floppy);
/* Free resources. */
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