* partmap/pc.c (pc_partition_map_iterate): Include the value of an
invalid magic in thre error.
* commands/search.c: New file.
* util/grub-emu.c (main): Call grub_search_init and
grub_search_fini.
* kern/rescue.c (grub_rescue_print_disks): Removed.
(grub_rescue_print_devices): New function.
(grub_rescue_cmd_ls): Use grub_device_iterate with
grub_rescue_print_devices instead of grub_disk_dev_iterate with
grub_rescue_print_disks.
* kern/partition.c (grub_partition_iterate): Return the result of
PARTMAP->ITERATE instead of GRUB_ERRNO.
* kern/device.c: Include grub/partition.h.
(grub_device_iterate): New function.
* include/grub/partition.h (grub_partition_iterate): Return int
instead of grub_err_t.
* include/grub/normal.h [GRUB_UTIL] (grub_search_init): New
prototype.
[GRUB_UTIL] (grub_search_fini): Likewise.
* include/grub/device.h (grub_device_iterate): New prototype.