grub/kern/device.c

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C
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2002-12-27 08:53:07 +00:00
/* device.c - device manager */
/*
* PUPA -- Preliminary Universal Programming Architecture for GRUB
shinori K. Okuji <okuji@enbug.org> * genkernsyms.sh: Updated copyright information. * genmk.rb: Likewise. * genmodsrc.sh: Likewise. * gensymlist.sh: Likewise. * boot/i386/pc/boot.S: Likewise. * boot/i386/pc/diskboot.S: Likewise. * disk/i386/pc/biosdisk.c: Likewise. * disk/i386/pc/partition.c: Likewise. * font/manager.c: Likewise. * fs/ext2.c: Likewise. * fs/fat.c: Likewise. * include/pupa/boot.h: Likewise. * include/pupa/device.h: Likewise. * include/pupa/disk.h: Likewise. * include/pupa/dl.h: Likewise. * include/pupa/elf.h: Likewise. * include/pupa/err.h: Likewise. * include/pupa/file.h: Likewise. * include/pupa/font.h: Likewise. * include/pupa/fs.h: Likewise. * include/pupa/kernel.h: Likewise. * include/pupa/loader.h: Likewise. * include/pupa/misc.h: Likewise. * include/pupa/mm.h: Likewise. * include/pupa/net.h: Likewise. * include/pupa/normal.h: Likewise. * include/pupa/rescue.h: Likewise. * include/pupa/setjmp.h: Likewise. * include/pupa/symbol.h: Likewise. * include/pupa/term.h: Likewise. * include/pupa/types.h: Likewise. * include/pupa/i386/setjmp.h: Likewise. * include/pupa/i386/types.h: Likewise. * include/pupa/i386/pc/biosdisk.h: Likewise. * include/pupa/i386/pc/boot.h: Likewise. * include/pupa/i386/pc/console.h: Likewise. * include/pupa/i386/pc/init.h: Likewise. * include/pupa/i386/pc/kernel.h: Likewise. * include/pupa/i386/pc/linux.h: Likewise. * include/pupa/i386/pc/loader.h: Likewise. * include/pupa/i386/pc/memory.h: Likewise. * include/pupa/i386/pc/multiboot.h: Likewise. * include/pupa/i386/pc/partition.h: Likewise. * include/pupa/i386/pc/time.h: Likewise. * include/pupa/i386/pc/vga.h: Likewise. * include/pupa/i386/pc/util/biosdisk.h: Likewise. * include/pupa/util/getroot.h: Likewise. * include/pupa/util/misc.h: Likewise. * include/pupa/util/resolve.h: Likewise. * kern/device.c: Likewise. * kern/disk.c: Likewise. * kern/dl.c: Likewise. * kern/err.c: Likewise. * kern/file.c: Likewise. * kern/fs.c: Likewise. * kern/loader.c: Likewise. * kern/main.c: Likewise. * kern/misc.c: Likewise. * kern/mm.c: Likewise. * kern/rescue.c: Likewise. * kern/term.c: Likewise. * kern/i386/dl.c: Likewise. * kern/i386/pc/init.c: Likewise. * kern/i386/pc/lzo1x.S: Likewise. * kern/i386/pc/startup.S: Likewise. * loader/i386/pc/chainloader.c: Likewise. * loader/i386/pc/linux.c: Likewise. * loader/i386/pc/multiboot.c: Likewise. * normal/cmdline.c: Likewise. * normal/command.c: Likewise. * normal/main.c: Likewise. * normal/menu.c: Likewise. * normal/i386/setjmp.S: Likewise. * term/i386/pc/console.c: Likewise. * term/i386/pc/vga.c: Likewise. * util/console.c: Likewise. * util/genmoddep.c: Likewise. * util/misc.c: Likewise. * util/pupa-emu.c: Likewise. * util/resolve.c: Likewise. * util/unifont2pff.rb: Likewise. * util/i386/pc/biosdisk.c: Likewise. * util/i386/pc/getroot.c: Likewise. * util/i386/pc/pupa-mkimage.c: Likewise. * util/i386/pc/pupa-setup.c: Likewise.
2004-02-24 17:21:53 +00:00
* Copyright (C) 2002 Free Software Foundation, Inc.
2002-12-27 08:53:07 +00:00
*
* PUPA 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 PUPA; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <pupa/device.h>
#include <pupa/disk.h>
#include <pupa/net.h>
#include <pupa/fs.h>
#include <pupa/mm.h>
#include <pupa/misc.h>
static char *pupa_device_root;
pupa_err_t
pupa_device_set_root (const char *name)
{
pupa_free (pupa_device_root);
pupa_device_root = pupa_strdup (name);
return pupa_errno;
}
const char *
pupa_device_get_root (void)
{
if (! pupa_device_root)
pupa_error (PUPA_ERR_BAD_DEVICE, "no root device");
return pupa_device_root;
}
pupa_device_t
pupa_device_open (const char *name)
{
pupa_disk_t disk = 0;
pupa_device_t dev = 0;
if (! name)
{
if (! pupa_device_root)
{
pupa_error (PUPA_ERR_BAD_DEVICE, "no device is set");
goto fail;
}
name = pupa_device_root;
}
dev = pupa_malloc (sizeof (*dev));
if (! dev)
goto fail;
/* Try to open a disk. */
disk = pupa_disk_open (name);
if (! disk)
{
pupa_error (PUPA_ERR_BAD_DEVICE, "unknown device");
goto fail;
}
dev->disk = disk;
dev->net = 0; /* FIXME */
return dev;
fail:
if (disk)
pupa_disk_close (disk);
pupa_free (dev);
return 0;
}
pupa_err_t
pupa_device_close (pupa_device_t device)
{
if (device->disk)
pupa_disk_close (device->disk);
pupa_free (device);
return pupa_errno;
}