100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
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/* device.c - device manager */
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/*
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* PUPA -- Preliminary Universal Programming Architecture for GRUB
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* Copyright (C) 2002 Yoshinori K. Okuji <okuji@enbug.org>
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*
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* PUPA is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with PUPA; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <pupa/device.h>
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#include <pupa/disk.h>
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#include <pupa/net.h>
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#include <pupa/fs.h>
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#include <pupa/mm.h>
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#include <pupa/misc.h>
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static char *pupa_device_root;
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pupa_err_t
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pupa_device_set_root (const char *name)
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{
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pupa_free (pupa_device_root);
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pupa_device_root = pupa_strdup (name);
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return pupa_errno;
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}
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const char *
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pupa_device_get_root (void)
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{
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if (! pupa_device_root)
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pupa_error (PUPA_ERR_BAD_DEVICE, "no root device");
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return pupa_device_root;
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}
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pupa_device_t
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pupa_device_open (const char *name)
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{
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pupa_disk_t disk = 0;
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pupa_device_t dev = 0;
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if (! name)
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{
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if (! pupa_device_root)
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{
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pupa_error (PUPA_ERR_BAD_DEVICE, "no device is set");
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goto fail;
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}
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name = pupa_device_root;
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}
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dev = pupa_malloc (sizeof (*dev));
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if (! dev)
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goto fail;
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/* Try to open a disk. */
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disk = pupa_disk_open (name);
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if (! disk)
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{
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pupa_error (PUPA_ERR_BAD_DEVICE, "unknown device");
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goto fail;
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}
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dev->disk = disk;
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dev->net = 0; /* FIXME */
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return dev;
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fail:
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if (disk)
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pupa_disk_close (disk);
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pupa_free (dev);
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return 0;
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}
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pupa_err_t
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pupa_device_close (pupa_device_t device)
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{
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if (device->disk)
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pupa_disk_close (device->disk);
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pupa_free (device);
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return pupa_errno;
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}
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