diff options
Diffstat (limited to 'grub-core/kern/device.c')
-rw-r--r-- | grub-core/kern/device.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/grub-core/kern/device.c b/grub-core/kern/device.c new file mode 100644 index 0000000..3db14f5 --- /dev/null +++ b/grub-core/kern/device.c @@ -0,0 +1,169 @@ +/* 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> + +grub_device_t +grub_device_open (const char *name) +{ + grub_disk_t disk = 0; + grub_device_t dev = 0; + + if (! name) + { + name = grub_env_get ("root"); + if (*name == '\0') + { + grub_error (GRUB_ERR_BAD_DEVICE, "no device is set"); + goto fail; + } + } + + dev = grub_malloc (sizeof (*dev)); + if (! dev) + goto fail; + + /* Try to open a disk. */ + disk = grub_disk_open (name); + if (! disk) + goto fail; + + dev->disk = disk; + dev->net = 0; /* FIXME */ + + return dev; + + fail: + if (disk) + grub_disk_close (disk); + + grub_free (dev); + + return 0; +} + +grub_err_t +grub_device_close (grub_device_t device) +{ + if (device->disk) + grub_disk_close (device->disk); + + grub_free (device); + + return grub_errno; +} + +int +grub_device_iterate (int (*hook) (const char *name)) +{ + auto int iterate_disk (const char *disk_name); + auto int iterate_partition (grub_disk_t disk, + const grub_partition_t partition); + + struct part_ent + { + struct part_ent *next; + char *name; + } *ents; + + int iterate_disk (const char *disk_name) + { + grub_device_t dev; + + if (hook (disk_name)) + 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; + + ents = NULL; + (void) grub_partition_iterate (dev->disk, iterate_partition); + grub_device_close (dev); + + grub_errno = GRUB_ERR_NONE; + + p = ents; + while (p != NULL) + { + struct part_ent *next = p->next; + + if (!ret) + ret = hook (p->name); + grub_free (p->name); + grub_free (p); + p = next; + } + + return ret; + } + + grub_device_close (dev); + return 0; + } + + int iterate_partition (grub_disk_t disk, const grub_partition_t partition) + { + 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 = ents; + ents = p; + + return 0; + } + + /* Only disk devices are supported at the moment. */ + return grub_disk_dev_iterate (iterate_disk); +} |