From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:29:51 +0200 Subject: Adding upstream version 2.06. Signed-off-by: Daniel Baumann --- grub-core/disk/host.c | 103 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 grub-core/disk/host.c (limited to 'grub-core/disk/host.c') diff --git a/grub-core/disk/host.c b/grub-core/disk/host.c new file mode 100644 index 0000000..c151d22 --- /dev/null +++ b/grub-core/disk/host.c @@ -0,0 +1,103 @@ +/* host.c - Dummy disk driver to provide access to the hosts filesystem */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2007 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +/* When using the disk, make a reference to this module. Otherwise + the user will end up with a useless module :-). */ + +#include +#include + +#include +#include +#include +#include + +int grub_disk_host_i_want_a_reference; + +static int +grub_host_iterate (grub_disk_dev_iterate_hook_t hook, void *hook_data, + grub_disk_pull_t pull) +{ + if (pull != GRUB_DISK_PULL_NONE) + return 0; + + if (hook ("host", hook_data)) + return 1; + return 0; +} + +static grub_err_t +grub_host_open (const char *name, grub_disk_t disk) +{ + if (grub_strcmp (name, "host")) + return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "not a host disk"); + + disk->total_sectors = 0; + disk->id = 0; + + disk->data = 0; + + return GRUB_ERR_NONE; +} + +static void +grub_host_close (grub_disk_t disk __attribute((unused))) +{ +} + +static grub_err_t +grub_host_read (grub_disk_t disk __attribute((unused)), + grub_disk_addr_t sector __attribute((unused)), + grub_size_t size __attribute((unused)), + char *buf __attribute((unused))) +{ + return GRUB_ERR_OUT_OF_RANGE; +} + +static grub_err_t +grub_host_write (grub_disk_t disk __attribute ((unused)), + grub_disk_addr_t sector __attribute ((unused)), + grub_size_t size __attribute ((unused)), + const char *buf __attribute ((unused))) +{ + return GRUB_ERR_OUT_OF_RANGE; +} + +static struct grub_disk_dev grub_host_dev = + { + /* The only important line in this file :-) */ + .name = "host", + .id = GRUB_DISK_DEVICE_HOST_ID, + .disk_iterate = grub_host_iterate, + .disk_open = grub_host_open, + .disk_close = grub_host_close, + .disk_read = grub_host_read, + .disk_write = grub_host_write, + .next = 0 + }; + +GRUB_MOD_INIT(host) +{ + grub_disk_dev_register (&grub_host_dev); +} + +GRUB_MOD_FINI(host) +{ + grub_disk_dev_unregister (&grub_host_dev); +} -- cgit v1.2.3