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/* device.c - device manager */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2005,2007,2008,2009 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 <http://www.gnu.org/licenses/>.
*/
#include <grub/device.h>
#include <grub/disk.h>
#include <grub/net.h>
#include <grub/fs.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/env.h>
#include <grub/partition.h>
#include <grub/i18n.h>
grub_net_t (*grub_net_open) (const char *name) = NULL;
grub_device_t
grub_device_open (const char *name)
{
grub_device_t dev = 0;
if (! name)
{
name = grub_env_get ("root");
if (name == NULL || *name == '\0')
{
grub_error (GRUB_ERR_BAD_DEVICE, N_("variable `%s' isn't set"), "root");
goto fail;
}
}
dev = grub_malloc (sizeof (*dev));
if (! dev)
goto fail;
dev->net = NULL;
/* Try to open a disk. */
dev->disk = grub_disk_open (name);
if (dev->disk)
return dev;
if (grub_net_open && grub_errno == GRUB_ERR_UNKNOWN_DEVICE)
{
grub_errno = GRUB_ERR_NONE;
dev->net = grub_net_open (name);
}
if (dev->net)
return dev;
fail:
grub_free (dev);
return 0;
}
grub_err_t
grub_device_close (grub_device_t device)
{
if (device->disk)
grub_disk_close (device->disk);
if (device->net)
{
grub_free (device->net->server);
grub_free (device->net);
}
grub_free (device);
return grub_errno;
}
struct part_ent
{
struct part_ent *next;
char *name;
};
/* Context for grub_device_iterate. */
struct grub_device_iterate_ctx
{
grub_device_iterate_hook_t hook;
void *hook_data;
struct part_ent *ents;
};
/* Helper for grub_device_iterate. */
static int
iterate_partition (grub_disk_t disk, const grub_partition_t partition,
void *data)
{
struct grub_device_iterate_ctx *ctx = data;
struct part_ent *p;
char *part_name;
p = grub_malloc (sizeof (*p));
if (!p)
{
return 1;
}
part_name = grub_partition_get_name (partition);
if (!part_name)
{
grub_free (p);
return 1;
}
p->name = grub_xasprintf ("%s,%s", disk->name, part_name);
grub_free (part_name);
if (!p->name)
{
grub_free (p);
return 1;
}
p->next = ctx->ents;
ctx->ents = p;
return 0;
}
/* Helper for grub_device_iterate. */
static int
iterate_disk (const char *disk_name, void *data)
{
struct grub_device_iterate_ctx *ctx = data;
grub_device_t dev;
if (ctx->hook (disk_name, ctx->hook_data))
return 1;
dev = grub_device_open (disk_name);
if (! dev)
{
grub_errno = GRUB_ERR_NONE;
return 0;
}
if (dev->disk)
{
struct part_ent *p;
int ret = 0;
ctx->ents = NULL;
(void) grub_partition_iterate (dev->disk, iterate_partition, ctx);
grub_device_close (dev);
grub_errno = GRUB_ERR_NONE;
p = ctx->ents;
while (p != NULL)
{
struct part_ent *next = p->next;
if (!ret)
ret = ctx->hook (p->name, ctx->hook_data);
grub_free (p->name);
grub_free (p);
p = next;
}
return ret;
}
grub_device_close (dev);
return 0;
}
int
grub_device_iterate (grub_device_iterate_hook_t hook, void *hook_data)
{
struct grub_device_iterate_ctx ctx = { hook, hook_data, NULL };
/* Only disk devices are supported at the moment. */
return grub_disk_dev_iterate (iterate_disk, &ctx);
}
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