grub/fs/iso9660.c
Vladimir 'phcoder' Serbinenko 618307dd08 2010-02-20 Vladimir Serbinenko <phcoder@gmail.com>
* fs/iso9660.c (grub_iso9660_iterate_dir): Strip version from joliet
	filename.
	Reported by: Georgy Buranov
2010-02-22 09:18:59 +01:00

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/* 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>
#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);
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);
}