diff options
Diffstat (limited to 'grub-core/fs/iso9660.c')
| -rw-r--r-- | grub-core/fs/iso9660.c | 908 |
1 files changed, 908 insertions, 0 deletions
diff --git a/grub-core/fs/iso9660.c b/grub-core/fs/iso9660.c new file mode 100644 index 0000000..a9a17fe --- /dev/null +++ b/grub-core/fs/iso9660.c @@ -0,0 +1,908 @@ +/* iso9660.c - iso9660 implementation with extensions: + SUSP, Rock Ridge. */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2004,2005,2006,2007,2008,2009,2010 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/err.h> +#include <grub/file.h> +#include <grub/mm.h> +#include <grub/misc.h> +#include <grub/disk.h> +#include <grub/dl.h> +#include <grub/types.h> +#include <grub/fshelp.h> +#include <grub/charset.h> + +GRUB_MOD_LICENSE ("GPLv3+"); + +#define GRUB_ISO9660_FSTYPE_DIR 0040000 +#define GRUB_ISO9660_FSTYPE_REG 0100000 +#define GRUB_ISO9660_FSTYPE_SYMLINK 0120000 +#define GRUB_ISO9660_FSTYPE_MASK 0170000 + +#define GRUB_ISO9660_LOG2_BLKSZ 2 +#define GRUB_ISO9660_BLKSZ 2048 + +#define GRUB_ISO9660_RR_DOT 2 +#define GRUB_ISO9660_RR_DOTDOT 4 + +#define GRUB_ISO9660_VOLDESC_BOOT 0 +#define GRUB_ISO9660_VOLDESC_PRIMARY 1 +#define GRUB_ISO9660_VOLDESC_SUPP 2 +#define GRUB_ISO9660_VOLDESC_PART 3 +#define GRUB_ISO9660_VOLDESC_END 255 + +/* The head of a volume descriptor. */ +struct grub_iso9660_voldesc +{ + grub_uint8_t type; + grub_uint8_t magic[5]; + grub_uint8_t version; +} __attribute__ ((packed)); + +/* A directory entry. */ +struct grub_iso9660_dir +{ + grub_uint8_t len; + grub_uint8_t ext_sectors; + grub_uint32_t first_sector; + grub_uint32_t first_sector_be; + grub_uint32_t size; + grub_uint32_t size_be; + grub_uint8_t unused1[7]; + grub_uint8_t flags; + grub_uint8_t unused2[6]; + grub_uint8_t namelen; +} __attribute__ ((packed)); + +struct grub_iso9660_date +{ + grub_uint8_t year[4]; + grub_uint8_t month[2]; + grub_uint8_t day[2]; + grub_uint8_t hour[2]; + grub_uint8_t minute[2]; + grub_uint8_t second[2]; + grub_uint8_t hundredth[2]; + grub_uint8_t offset; +} __attribute__ ((packed)); + +/* The primary volume descriptor. Only little endian is used. */ +struct grub_iso9660_primary_voldesc +{ + struct grub_iso9660_voldesc voldesc; + grub_uint8_t unused1[33]; + grub_uint8_t volname[32]; + grub_uint8_t unused2[16]; + grub_uint8_t escape[32]; + grub_uint8_t unused3[12]; + grub_uint32_t path_table_size; + grub_uint8_t unused4[4]; + grub_uint32_t path_table; + grub_uint8_t unused5[12]; + struct grub_iso9660_dir rootdir; + grub_uint8_t unused6[624]; + struct grub_iso9660_date created; + struct grub_iso9660_date modified; +} __attribute__ ((packed)); + +/* A single entry in the path table. */ +struct grub_iso9660_path +{ + grub_uint8_t len; + grub_uint8_t sectors; + grub_uint32_t first_sector; + grub_uint16_t parentdir; + grub_uint8_t name[0]; +} __attribute__ ((packed)); + +/* An entry in the System Usage area of the directory entry. */ +struct grub_iso9660_susp_entry +{ + grub_uint8_t sig[2]; + grub_uint8_t len; + grub_uint8_t version; + grub_uint8_t data[0]; +} __attribute__ ((packed)); + +/* The CE entry. This is used to describe the next block where data + can be found. */ +struct grub_iso9660_susp_ce +{ + struct grub_iso9660_susp_entry entry; + grub_uint32_t blk; + grub_uint32_t blk_be; + grub_uint32_t off; + grub_uint32_t off_be; + grub_uint32_t len; + grub_uint32_t len_be; +} __attribute__ ((packed)); + +struct grub_iso9660_data +{ + struct grub_iso9660_primary_voldesc voldesc; + grub_disk_t disk; + unsigned int first_sector; + int rockridge; + int susp_skip; + int joliet; +}; + +struct grub_fshelp_node +{ + struct grub_iso9660_data *data; + unsigned int size; + unsigned int blk; + unsigned int dir_blk; + unsigned int dir_off; +}; + +static grub_dl_t my_mod; + + +/* Iterate over the susp entries, starting with block SUA_BLOCK on the + offset SUA_POS with a size of SUA_SIZE bytes. Hook is called for + every entry. */ +static grub_err_t +grub_iso9660_susp_iterate (struct grub_iso9660_data *data, + int sua_block, int sua_pos, int sua_size, + grub_err_t (*hook) + (struct grub_iso9660_susp_entry *entry)) +{ + char *sua; + struct grub_iso9660_susp_entry *entry; + + auto grub_err_t load_sua (void); + + /* Load a part of the System Usage Area. */ + grub_err_t load_sua (void) + { + sua = grub_malloc (sua_size); + if (!sua) + return grub_errno; + + if (grub_disk_read (data->disk, sua_block, sua_pos, + sua_size, sua)) + return grub_errno; + + entry = (struct grub_iso9660_susp_entry *) sua; + return 0; + } + + if (load_sua ()) + return grub_errno; + + for (; (char *) entry < (char *) sua + sua_size - 1; + entry = (struct grub_iso9660_susp_entry *) + ((char *) entry + entry->len)) + { + /* The last entry. */ + if (grub_strncmp ((char *) entry->sig, "ST", 2) == 0) + break; + + /* Additional entries are stored elsewhere. */ + if (grub_strncmp ((char *) entry->sig, "CE", 2) == 0) + { + struct grub_iso9660_susp_ce *ce; + + ce = (struct grub_iso9660_susp_ce *) entry; + sua_size = grub_le_to_cpu32 (ce->len); + sua_pos = grub_le_to_cpu32 (ce->off); + sua_block = grub_le_to_cpu32 (ce->blk) << GRUB_ISO9660_LOG2_BLKSZ; + + grub_free (sua); + if (load_sua ()) + return grub_errno; + } + + if (hook (entry)) + { + grub_free (sua); + return 0; + } + } + + grub_free (sua); + return 0; +} + +static char * +grub_iso9660_convert_string (grub_uint16_t *us, int len) +{ + char *p; + int i; + + p = grub_malloc (len * 4 + 1); + if (! p) + return p; + + for (i=0; i<len; i++) + us[i] = grub_be_to_cpu16 (us[i]); + + *grub_utf16_to_utf8 ((grub_uint8_t *) p, us, len) = '\0'; + + return p; +} + +static struct grub_iso9660_data * +grub_iso9660_mount (grub_disk_t disk) +{ + struct grub_iso9660_data *data = 0; + struct grub_iso9660_dir rootdir; + int sua_pos; + int sua_size; + char *sua; + struct grub_iso9660_susp_entry *entry; + struct grub_iso9660_primary_voldesc voldesc; + int block; + + auto grub_err_t susp_iterate (struct grub_iso9660_susp_entry *); + + grub_err_t susp_iterate (struct grub_iso9660_susp_entry *susp_entry) + { + /* The "ER" entry is used to detect extensions. The + `IEEE_P1285' extension means Rock ridge. */ + if (grub_strncmp ((char *) susp_entry->sig, "ER", 2) == 0) + { + data->rockridge = 1; + return 1; + } + return 0; + } + + data = grub_zalloc (sizeof (struct grub_iso9660_data)); + if (! data) + return 0; + + data->disk = disk; + + block = 16; + do + { + int copy_voldesc = 0; + + /* Read the superblock. */ + if (grub_disk_read (disk, block << GRUB_ISO9660_LOG2_BLKSZ, 0, + sizeof (struct grub_iso9660_primary_voldesc), + (char *) &voldesc)) + { + grub_error (GRUB_ERR_BAD_FS, "not a ISO9660 filesystem"); + goto fail; + } + + if (grub_strncmp ((char *) voldesc.voldesc.magic, "CD001", 5) != 0) + { + grub_error (GRUB_ERR_BAD_FS, "not a ISO9660 filesystem"); + goto fail; + } + + if (voldesc.voldesc.type == GRUB_ISO9660_VOLDESC_PRIMARY) + copy_voldesc = 1; + else if ((voldesc.voldesc.type == GRUB_ISO9660_VOLDESC_SUPP) && + (voldesc.escape[0] == 0x25) && (voldesc.escape[1] == 0x2f) && + ((voldesc.escape[2] == 0x40) || /* UCS-2 Level 1. */ + (voldesc.escape[2] == 0x43) || /* UCS-2 Level 2. */ + (voldesc.escape[2] == 0x45))) /* UCS-2 Level 3. */ + { + copy_voldesc = 1; + data->joliet = 1; + } + + if (copy_voldesc) + grub_memcpy((char *) &data->voldesc, (char *) &voldesc, + sizeof (struct grub_iso9660_primary_voldesc)); + + block++; + } while (voldesc.voldesc.type != GRUB_ISO9660_VOLDESC_END); + + /* Read the system use area and test it to see if SUSP is + supported. */ + if (grub_disk_read (disk, (grub_le_to_cpu32 (data->voldesc.rootdir.first_sector) + << GRUB_ISO9660_LOG2_BLKSZ), 0, + sizeof (rootdir), (char *) &rootdir)) + { + grub_error (GRUB_ERR_BAD_FS, "not a ISO9660 filesystem"); + goto fail; + } + + sua_pos = (sizeof (rootdir) + rootdir.namelen + + (rootdir.namelen % 2) - 1); + sua_size = rootdir.len - sua_pos; + + sua = grub_malloc (sua_size); + if (! sua) + goto fail; + + if (grub_disk_read (disk, (grub_le_to_cpu32 (data->voldesc.rootdir.first_sector) + << GRUB_ISO9660_LOG2_BLKSZ), sua_pos, + sua_size, sua)) + { + grub_error (GRUB_ERR_BAD_FS, "not a ISO9660 filesystem"); + goto fail; + } + + entry = (struct grub_iso9660_susp_entry *) sua; + + /* Test if the SUSP protocol is used on this filesystem. */ + if (grub_strncmp ((char *) entry->sig, "SP", 2) == 0) + { + /* The 2nd data byte stored how many bytes are skipped every time + to get to the SUA (System Usage Area). */ + data->susp_skip = entry->data[2]; + entry = (struct grub_iso9660_susp_entry *) ((char *) entry + entry->len); + + /* Iterate over the entries in the SUA area to detect + extensions. */ + if (grub_iso9660_susp_iterate (data, + (grub_le_to_cpu32 (data->voldesc.rootdir.first_sector) + << GRUB_ISO9660_LOG2_BLKSZ), + sua_pos, sua_size, susp_iterate)) + goto fail; + } + + return data; + + fail: + grub_free (data); + return 0; +} + + +static char * +grub_iso9660_read_symlink (grub_fshelp_node_t node) +{ + struct grub_iso9660_dir dirent; + int sua_off; + int sua_size; + char *symlink = 0; + int addslash = 0; + + auto void add_part (const char *part, int len); + auto grub_err_t susp_iterate_sl (struct grub_iso9660_susp_entry *); + + /* Extend the symlink. */ + void add_part (const char *part, int len) + { + int size = grub_strlen (symlink); + + symlink = grub_realloc (symlink, size + len + 1); + if (! symlink) + return; + + grub_strncat (symlink, part, len); + } + + /* Read in a symlink. */ + grub_err_t susp_iterate_sl (struct grub_iso9660_susp_entry *entry) + { + if (grub_strncmp ("SL", (char *) entry->sig, 2) == 0) + { + unsigned int pos = 1; + + /* The symlink is not stored as a POSIX symlink, translate it. */ + while (pos < grub_le_to_cpu32 (entry->len)) + { + if (addslash) + { + add_part ("/", 1); + addslash = 0; + } + + /* The current position is the `Component Flag'. */ + switch (entry->data[pos] & 30) + { + case 0: + { + /* The data on pos + 2 is the actual data, pos + 1 + is the length. Both are part of the `Component + Record'. */ + add_part ((char *) &entry->data[pos + 2], + entry->data[pos + 1]); + if ((entry->data[pos] & 1)) + addslash = 1; + + break; + } + + case 2: + add_part ("./", 2); + break; + + case 4: + add_part ("../", 3); + break; + + case 8: + add_part ("/", 1); + break; + } + /* In pos + 1 the length of the `Component Record' is + stored. */ + pos += entry->data[pos + 1] + 2; + } + + /* Check if `grub_realloc' failed. */ + if (grub_errno) + return grub_errno; + } + + return 0; + } + + if (grub_disk_read (node->data->disk, node->dir_blk, node->dir_off, + sizeof (dirent), (char *) &dirent)) + return 0; + + sua_off = (sizeof (dirent) + dirent.namelen + 1 - (dirent.namelen % 2) + + node->data->susp_skip); + sua_size = dirent.len - sua_off; + + symlink = grub_malloc (1); + if (!symlink) + return 0; + + *symlink = '\0'; + + if (grub_iso9660_susp_iterate (node->data, node->dir_blk, + node->dir_off + sua_off, + sua_size, susp_iterate_sl)) + { + grub_free (symlink); + return 0; + } + + return symlink; +} + + +static int +grub_iso9660_iterate_dir (grub_fshelp_node_t dir, + int NESTED_FUNC_ATTR + (*hook) (const char *filename, + enum grub_fshelp_filetype filetype, + grub_fshelp_node_t node)) +{ + struct grub_iso9660_dir dirent; + unsigned int offset = 0; + char *filename; + int filename_alloc = 0; + enum grub_fshelp_filetype type; + + auto grub_err_t susp_iterate_dir (struct grub_iso9660_susp_entry *); + + grub_err_t susp_iterate_dir (struct grub_iso9660_susp_entry *entry) + { + /* The filename in the rock ridge entry. */ + if (grub_strncmp ("NM", (char *) entry->sig, 2) == 0) + { + /* The flags are stored at the data position 0, here the + filename type is stored. */ + if (entry->data[0] & GRUB_ISO9660_RR_DOT) + filename = "."; + else if (entry->data[0] & GRUB_ISO9660_RR_DOTDOT) + filename = ".."; + else + { + int size = 1; + if (filename) + { + size += grub_strlen (filename); + grub_realloc (filename, + grub_strlen (filename) + + entry->len); + } + else + { + size = entry->len - 5; + filename = grub_zalloc (size + 1); + } + filename_alloc = 1; + grub_strncpy (filename, (char *) &entry->data[1], size); + filename[size] = '\0'; + } + } + /* The mode information (st_mode). */ + else if (grub_strncmp ((char *) entry->sig, "PX", 2) == 0) + { + /* At position 0 of the PX record the st_mode information is + stored (little-endian). */ + grub_uint32_t mode = ((entry->data[0] + (entry->data[1] << 8)) + & GRUB_ISO9660_FSTYPE_MASK); + + switch (mode) + { + case GRUB_ISO9660_FSTYPE_DIR: + type = GRUB_FSHELP_DIR; + break; + case GRUB_ISO9660_FSTYPE_REG: + type = GRUB_FSHELP_REG; + break; + case GRUB_ISO9660_FSTYPE_SYMLINK: + type = GRUB_FSHELP_SYMLINK; + break; + default: + type = GRUB_FSHELP_UNKNOWN; + } + } + + return 0; + } + + while (offset < dir->size) + { + if (grub_disk_read (dir->data->disk, + (dir->blk << GRUB_ISO9660_LOG2_BLKSZ) + + offset / GRUB_DISK_SECTOR_SIZE, + offset % GRUB_DISK_SECTOR_SIZE, + sizeof (dirent), (char *) &dirent)) + return 0; + + /* The end of the block, skip to the next one. */ + if (!dirent.len) + { + offset = (offset / GRUB_ISO9660_BLKSZ + 1) * GRUB_ISO9660_BLKSZ; + continue; + } + + { + char name[dirent.namelen + 1]; + int nameoffset = offset + sizeof (dirent); + struct grub_fshelp_node *node; + int sua_off = (sizeof (dirent) + dirent.namelen + 1 + - (dirent.namelen % 2)); + int sua_size = dirent.len - sua_off; + + sua_off += offset + dir->data->susp_skip; + + filename = 0; + filename_alloc = 0; + type = GRUB_FSHELP_UNKNOWN; + + if (dir->data->rockridge + && grub_iso9660_susp_iterate (dir->data, + (dir->blk << GRUB_ISO9660_LOG2_BLKSZ) + + (sua_off + / GRUB_DISK_SECTOR_SIZE), + sua_off % GRUB_DISK_SECTOR_SIZE, + sua_size, susp_iterate_dir)) + return 0; + + /* Read the name. */ + if (grub_disk_read (dir->data->disk, + (dir->blk << GRUB_ISO9660_LOG2_BLKSZ) + + nameoffset / GRUB_DISK_SECTOR_SIZE, + nameoffset % GRUB_DISK_SECTOR_SIZE, + dirent.namelen, (char *) name)) + return 0; + + node = grub_malloc (sizeof (struct grub_fshelp_node)); + if (!node) + return 0; + + /* Setup a new node. */ + node->data = dir->data; + node->size = grub_le_to_cpu32 (dirent.size); + node->blk = grub_le_to_cpu32 (dirent.first_sector); + node->dir_blk = ((dir->blk << GRUB_ISO9660_LOG2_BLKSZ) + + offset / GRUB_DISK_SECTOR_SIZE); + node->dir_off = offset % GRUB_DISK_SECTOR_SIZE; + + /* If the filetype was not stored using rockridge, use + whatever is stored in the iso9660 filesystem. */ + if (type == GRUB_FSHELP_UNKNOWN) + { + if ((dirent.flags & 3) == 2) + type = GRUB_FSHELP_DIR; + else + type = GRUB_FSHELP_REG; + } + + /* The filename was not stored in a rock ridge entry. Read it + from the iso9660 filesystem. */ + if (!filename) + { + name[dirent.namelen] = '\0'; + filename = grub_strrchr (name, ';'); + if (filename) + *filename = '\0'; + + if (dirent.namelen == 1 && name[0] == 0) + filename = "."; + else if (dirent.namelen == 1 && name[0] == 1) + filename = ".."; + else + filename = name; + } + + if (dir->data->joliet) + { + char *oldname, *semicolon; + + oldname = filename; + filename = grub_iso9660_convert_string + ((grub_uint16_t *) oldname, dirent.namelen >> 1); + + semicolon = grub_strrchr (filename, ';'); + if (semicolon) + *semicolon = '\0'; + + if (filename_alloc) + grub_free (oldname); + + filename_alloc = 1; + } + + if (hook (filename, type, node)) + { + if (filename_alloc) + grub_free (filename); + return 1; + } + if (filename_alloc) + grub_free (filename); + } + + offset += dirent.len; + } + + return 0; +} + + + +static grub_err_t +grub_iso9660_dir (grub_device_t device, const char *path, + int (*hook) (const char *filename, + const struct grub_dirhook_info *info)) +{ + struct grub_iso9660_data *data = 0; + struct grub_fshelp_node rootnode; + struct grub_fshelp_node *foundnode; + + auto int NESTED_FUNC_ATTR iterate (const char *filename, + enum grub_fshelp_filetype filetype, + grub_fshelp_node_t node); + + int NESTED_FUNC_ATTR iterate (const char *filename, + enum grub_fshelp_filetype filetype, + grub_fshelp_node_t node) + { + struct grub_dirhook_info info; + grub_memset (&info, 0, sizeof (info)); + info.dir = ((filetype & GRUB_FSHELP_TYPE_MASK) == GRUB_FSHELP_DIR); + grub_free (node); + return hook (filename, &info); + } + + grub_dl_ref (my_mod); + + data = grub_iso9660_mount (device->disk); + if (! data) + goto fail; + + rootnode.data = data; + rootnode.blk = grub_le_to_cpu32 (data->voldesc.rootdir.first_sector); + rootnode.size = grub_le_to_cpu32 (data->voldesc.rootdir.size); + + /* Use the fshelp function to traverse the path. */ + if (grub_fshelp_find_file (path, &rootnode, + &foundnode, + grub_iso9660_iterate_dir, + grub_iso9660_read_symlink, + GRUB_FSHELP_DIR)) + goto fail; + + /* List the files in the directory. */ + grub_iso9660_iterate_dir (foundnode, iterate); + + if (foundnode != &rootnode) + grub_free (foundnode); + + fail: + grub_free (data); + + grub_dl_unref (my_mod); + + return grub_errno; +} + + +/* Open a file named NAME and initialize FILE. */ +static grub_err_t +grub_iso9660_open (struct grub_file *file, const char *name) +{ + struct grub_iso9660_data *data; + struct grub_fshelp_node rootnode; + struct grub_fshelp_node *foundnode; + + grub_dl_ref (my_mod); + + data = grub_iso9660_mount (file->device->disk); + if (!data) + goto fail; + + rootnode.data = data; + rootnode.blk = grub_le_to_cpu32 (data->voldesc.rootdir.first_sector); + rootnode.size = grub_le_to_cpu32 (data->voldesc.rootdir.size); + + /* Use the fshelp function to traverse the path. */ + if (grub_fshelp_find_file (name, &rootnode, + &foundnode, + grub_iso9660_iterate_dir, + grub_iso9660_read_symlink, + GRUB_FSHELP_REG)) + goto fail; + + data->first_sector = foundnode->blk; + + file->data = data; + file->size = foundnode->size; + file->offset = 0; + + return 0; + + fail: + grub_dl_unref (my_mod); + + grub_free (data); + + return grub_errno; +} + + +static grub_ssize_t +grub_iso9660_read (grub_file_t file, char *buf, grub_size_t len) +{ + struct grub_iso9660_data *data = + (struct grub_iso9660_data *) file->data; + + /* XXX: The file is stored in as a single extent. */ + data->disk->read_hook = file->read_hook; + grub_disk_read (data->disk, + data->first_sector << GRUB_ISO9660_LOG2_BLKSZ, + file->offset, + len, buf); + data->disk->read_hook = NULL; + + if (grub_errno) + return -1; + + return len; +} + + +static grub_err_t +grub_iso9660_close (grub_file_t file) +{ + grub_free (file->data); + + grub_dl_unref (my_mod); + + return GRUB_ERR_NONE; +} + + +static grub_err_t +grub_iso9660_label (grub_device_t device, char **label) +{ + struct grub_iso9660_data *data; + data = grub_iso9660_mount (device->disk); + + if (data) + { + if (data->joliet) + *label = grub_iso9660_convert_string + ((grub_uint16_t *) &data->voldesc.volname, 16); + else + *label = grub_strndup ((char *) data->voldesc.volname, 32); + if (*label) + { + char *ptr; + for (ptr = *label; *ptr;ptr++); + ptr--; + while (ptr >= *label && *ptr == ' ') + *ptr-- = 0; + } + + grub_free (data); + } + else + *label = 0; + + return grub_errno; +} + + +static grub_err_t +grub_iso9660_uuid (grub_device_t device, char **uuid) +{ + struct grub_iso9660_data *data; + grub_disk_t disk = device->disk; + + grub_dl_ref (my_mod); + + data = grub_iso9660_mount (disk); + if (data) + { + if (! data->voldesc.modified.year[0] && ! data->voldesc.modified.year[1] + && ! data->voldesc.modified.year[2] && ! data->voldesc.modified.year[3] + && ! data->voldesc.modified.month[0] && ! data->voldesc.modified.month[1] + && ! data->voldesc.modified.day[0] && ! data->voldesc.modified.day[1] + && ! data->voldesc.modified.hour[0] && ! data->voldesc.modified.hour[1] + && ! data->voldesc.modified.minute[0] && ! data->voldesc.modified.minute[1] + && ! data->voldesc.modified.second[0] && ! data->voldesc.modified.second[1] + && ! data->voldesc.modified.hundredth[0] && ! data->voldesc.modified.hundredth[1]) + { + grub_error (GRUB_ERR_BAD_NUMBER, "no creation date in filesystem to generate UUID"); + *uuid = NULL; + } + else + { + *uuid = grub_xasprintf ("%c%c%c%c-%c%c-%c%c-%c%c-%c%c-%c%c-%c%c", + data->voldesc.modified.year[0], + data->voldesc.modified.year[1], + data->voldesc.modified.year[2], + data->voldesc.modified.year[3], + data->voldesc.modified.month[0], + data->voldesc.modified.month[1], + data->voldesc.modified.day[0], + data->voldesc.modified.day[1], + data->voldesc.modified.hour[0], + data->voldesc.modified.hour[1], + data->voldesc.modified.minute[0], + data->voldesc.modified.minute[1], + data->voldesc.modified.second[0], + data->voldesc.modified.second[1], + data->voldesc.modified.hundredth[0], + data->voldesc.modified.hundredth[1]); + } + } + else + *uuid = NULL; + + grub_dl_unref (my_mod); + + grub_free (data); + + return grub_errno; +} + + + +static struct grub_fs grub_iso9660_fs = + { + .name = "iso9660", + .dir = grub_iso9660_dir, + .open = grub_iso9660_open, + .read = grub_iso9660_read, + .close = grub_iso9660_close, + .label = grub_iso9660_label, + .uuid = grub_iso9660_uuid, + .next = 0 + }; + +GRUB_MOD_INIT(iso9660) +{ + grub_fs_register (&grub_iso9660_fs); + my_mod = mod; +} + +GRUB_MOD_FINI(iso9660) +{ + grub_fs_unregister (&grub_iso9660_fs); +} |