diff options
Diffstat (limited to 'libparted/fs/fat/fat.c')
| -rw-r--r-- | libparted/fs/fat/fat.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/libparted/fs/fat/fat.c b/libparted/fs/fat/fat.c new file mode 100644 index 0000000..c04f178 --- /dev/null +++ b/libparted/fs/fat/fat.c @@ -0,0 +1,162 @@ +/* + libparted + Copyright (C) 1998-2001, 2007-2014, 2019-2023 Free Software Foundation, + Inc. + + This program 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. + + 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 this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> +#include <string.h> +#include <uuid/uuid.h> + +#include "fat.h" + +PedFileSystem* +fat_alloc (const PedGeometry* geom) +{ + PedFileSystem* fs; + + fs = (PedFileSystem*) ped_malloc (sizeof (PedFileSystem)); + if (!fs) + goto error; + + fs->type_specific = (FatSpecific*) ped_malloc (sizeof (FatSpecific)); + if (!fs->type_specific) + goto error_free_fs; + FatSpecific* fs_info = (FatSpecific*) fs->type_specific; + fs_info->boot_sector = NULL; + fs_info->info_sector = NULL; + fs->geom = ped_geometry_duplicate (geom); + if (!fs->geom) + goto error_free_type_specific; + + fs->checked = 0; + return fs; + +error_free_type_specific: + free (fs->type_specific); +error_free_fs: + free (fs); +error: + return NULL; +} + +void +fat_free (PedFileSystem* fs) +{ + FatSpecific* fs_info = (FatSpecific*) fs->type_specific; + free (fs_info->boot_sector); + ped_geometry_destroy (fs->geom); + free (fs->type_specific); + free (fs); +} + +PedGeometry* +fat_probe (PedGeometry* geom, FatType* fat_type) +{ + PedFileSystem* fs; + FatSpecific* fs_info; + PedGeometry* result; + + fs = fat_alloc (geom); + if (!fs) + goto error; + fs_info = (FatSpecific*) fs->type_specific; + + if (!fat_boot_sector_read (&fs_info->boot_sector, geom)) + goto error_free_fs; + if (!fat_boot_sector_analyse (fs_info->boot_sector, fs)) + goto error_free_fs; + + *fat_type = fs_info->fat_type; + result = ped_geometry_new (geom->dev, geom->start, + fs_info->sector_count); + + fat_free (fs); + return result; + +error_free_fs: + fat_free (fs); +error: + return NULL; +} + +PedGeometry* +fat_probe_fat16 (PedGeometry* geom) +{ + FatType fat_type; + PedGeometry* probed_geom = fat_probe (geom, &fat_type); + + if (probed_geom) { + if (fat_type == FAT_TYPE_FAT16) + return probed_geom; + ped_geometry_destroy (probed_geom); + } + return NULL; +} + +PedGeometry* +fat_probe_fat32 (PedGeometry* geom) +{ + FatType fat_type; + PedGeometry* probed_geom = fat_probe (geom, &fat_type); + + if (probed_geom) { + if (fat_type == FAT_TYPE_FAT32) + return probed_geom; + ped_geometry_destroy (probed_geom); + } + return NULL; +} + +static PedFileSystemOps fat16_ops = { + probe: fat_probe_fat16, +}; + +static PedFileSystemOps fat32_ops = { + probe: fat_probe_fat32, +}; + +PedFileSystemType fat16_type = { + next: NULL, + ops: &fat16_ops, + name: "fat16", +}; + +PedFileSystemType fat32_type = { + next: NULL, + ops: &fat32_ops, + name: "fat32", +}; + +void +ped_file_system_fat_init () +{ + if (sizeof (FatBootSector) != 512) { + ped_exception_throw (PED_EXCEPTION_BUG, PED_EXCEPTION_CANCEL, + _("GNU Parted was miscompiled: the FAT boot sector " + "should be 512 bytes. FAT support will be disabled.")); + } else { + ped_file_system_type_register (&fat16_type); + ped_file_system_type_register (&fat32_type); + } +} + +void +ped_file_system_fat_done () +{ + ped_file_system_type_unregister (&fat16_type); + ped_file_system_type_unregister (&fat32_type); +} |