1072 lines
26 KiB
C
1072 lines
26 KiB
C
/* 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>
|
||
#include <grub/datetime.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));
|
||
|
||
struct grub_iso9660_date2
|
||
{
|
||
grub_uint8_t year;
|
||
grub_uint8_t month;
|
||
grub_uint8_t day;
|
||
grub_uint8_t hour;
|
||
grub_uint8_t minute;
|
||
grub_uint8_t second;
|
||
grub_uint8_t offset;
|
||
} __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;
|
||
struct grub_iso9660_date2 mtime;
|
||
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;
|
||
int rockridge;
|
||
int susp_skip;
|
||
int joliet;
|
||
struct grub_fshelp_node *node;
|
||
};
|
||
|
||
struct grub_fshelp_node
|
||
{
|
||
struct grub_iso9660_data *data;
|
||
grub_size_t have_dirents, alloc_dirents;
|
||
char *symlink;
|
||
struct grub_iso9660_dir dirents[8];
|
||
};
|
||
|
||
enum
|
||
{
|
||
FLAG_TYPE_PLAIN = 0,
|
||
FLAG_TYPE_DIR = 2,
|
||
FLAG_TYPE = 3,
|
||
FLAG_MORE_EXTENTS = 0x80
|
||
};
|
||
|
||
static grub_dl_t my_mod;
|
||
|
||
|
||
static grub_err_t
|
||
iso9660_to_unixtime (const struct grub_iso9660_date *i, grub_int32_t *nix)
|
||
{
|
||
struct grub_datetime datetime;
|
||
|
||
if (! i->year[0] && ! i->year[1]
|
||
&& ! i->year[2] && ! i->year[3]
|
||
&& ! i->month[0] && ! i->month[1]
|
||
&& ! i->day[0] && ! i->day[1]
|
||
&& ! i->hour[0] && ! i->hour[1]
|
||
&& ! i->minute[0] && ! i->minute[1]
|
||
&& ! i->second[0] && ! i->second[1]
|
||
&& ! i->hundredth[0] && ! i->hundredth[1])
|
||
return grub_error (GRUB_ERR_BAD_NUMBER, "empty date");
|
||
datetime.year = (i->year[0] - '0') * 1000 + (i->year[1] - '0') * 100
|
||
+ (i->year[2] - '0') * 10 + (i->year[3] - '0');
|
||
datetime.month = (i->month[0] - '0') * 10 + (i->month[1] - '0');
|
||
datetime.day = (i->day[0] - '0') * 10 + (i->day[1] - '0');
|
||
datetime.hour = (i->hour[0] - '0') * 10 + (i->hour[1] - '0');
|
||
datetime.minute = (i->minute[0] - '0') * 10 + (i->minute[1] - '0');
|
||
datetime.second = (i->second[0] - '0') * 10 + (i->second[1] - '0');
|
||
|
||
if (!grub_datetime2unixtime (&datetime, nix))
|
||
return grub_error (GRUB_ERR_BAD_NUMBER, "incorrect date");
|
||
*nix -= i->offset * 60 * 15;
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
static int
|
||
iso9660_to_unixtime2 (const struct grub_iso9660_date2 *i, grub_int32_t *nix)
|
||
{
|
||
struct grub_datetime datetime;
|
||
|
||
datetime.year = i->year + 1900;
|
||
datetime.month = i->month;
|
||
datetime.day = i->day;
|
||
datetime.hour = i->hour;
|
||
datetime.minute = i->minute;
|
||
datetime.second = i->second;
|
||
|
||
if (!grub_datetime2unixtime (&datetime, nix))
|
||
return 0;
|
||
*nix -= i->offset * 60 * 15;
|
||
return 1;
|
||
}
|
||
|
||
static grub_err_t
|
||
read_node (grub_fshelp_node_t node, grub_off_t off, grub_size_t len, char *buf)
|
||
{
|
||
grub_size_t i = 0;
|
||
|
||
while (len > 0)
|
||
{
|
||
grub_size_t toread;
|
||
grub_err_t err;
|
||
while (i < node->have_dirents
|
||
&& off >= grub_le_to_cpu32 (node->dirents[i].size))
|
||
{
|
||
off -= grub_le_to_cpu32 (node->dirents[i].size);
|
||
i++;
|
||
}
|
||
if (i == node->have_dirents)
|
||
return grub_error (GRUB_ERR_OUT_OF_RANGE, "read out of range");
|
||
toread = grub_le_to_cpu32 (node->dirents[i].size);
|
||
if (toread > len)
|
||
toread = len;
|
||
err = grub_disk_read (node->data->disk,
|
||
((grub_disk_addr_t) grub_le_to_cpu32 (node->dirents[i].first_sector)) << GRUB_ISO9660_LOG2_BLKSZ,
|
||
off, toread, buf);
|
||
if (err)
|
||
return err;
|
||
len -= toread;
|
||
off += toread;
|
||
buf += toread;
|
||
}
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
/* 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 (grub_fshelp_node_t node, grub_off_t off,
|
||
grub_ssize_t sua_size,
|
||
grub_err_t (*hook)
|
||
(struct grub_iso9660_susp_entry *entry))
|
||
{
|
||
char *sua;
|
||
struct grub_iso9660_susp_entry *entry;
|
||
grub_disk_addr_t ce_block;
|
||
int is_ce = 0;
|
||
|
||
auto grub_err_t load_sua (void);
|
||
|
||
/* Load a part of the System Usage Area. */
|
||
grub_err_t load_sua (void)
|
||
{
|
||
grub_err_t err;
|
||
sua = grub_malloc (sua_size);
|
||
if (!sua)
|
||
return grub_errno;
|
||
|
||
if (is_ce)
|
||
err = grub_disk_read (node->data->disk, ce_block, off,
|
||
sua_size, sua);
|
||
else
|
||
err = read_node (node, off, sua_size, sua);
|
||
if (err)
|
||
return err;
|
||
|
||
entry = (struct grub_iso9660_susp_entry *) sua;
|
||
return 0;
|
||
}
|
||
|
||
if (sua_size <= 0)
|
||
return GRUB_ERR_NONE;
|
||
|
||
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;
|
||
|
||
is_ce = 1;
|
||
ce = (struct grub_iso9660_susp_ce *) entry;
|
||
sua_size = grub_le_to_cpu32 (ce->len);
|
||
off = grub_le_to_cpu32 (ce->off);
|
||
ce_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 grub_err_t
|
||
set_rockridge (struct grub_iso9660_data *data)
|
||
{
|
||
int sua_pos;
|
||
int sua_size;
|
||
char *sua;
|
||
struct grub_iso9660_dir rootdir;
|
||
struct grub_iso9660_susp_entry *entry;
|
||
|
||
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->rockridge = 0;
|
||
|
||
/* Read the system use area and test it to see if SUSP is
|
||
supported. */
|
||
if (grub_disk_read (data->disk,
|
||
(grub_le_to_cpu32 (data->voldesc.rootdir.first_sector)
|
||
<< GRUB_ISO9660_LOG2_BLKSZ), 0,
|
||
sizeof (rootdir), (char *) &rootdir))
|
||
return grub_error (GRUB_ERR_BAD_FS, "not a ISO9660 filesystem");
|
||
|
||
sua_pos = (sizeof (rootdir) + rootdir.namelen
|
||
+ (rootdir.namelen % 2) - 1);
|
||
sua_size = rootdir.len - sua_pos;
|
||
|
||
if (!sua_size)
|
||
return GRUB_ERR_NONE;
|
||
|
||
sua = grub_malloc (sua_size);
|
||
if (! sua)
|
||
return grub_errno;
|
||
|
||
if (grub_disk_read (data->disk,
|
||
(grub_le_to_cpu32 (data->voldesc.rootdir.first_sector)
|
||
<< GRUB_ISO9660_LOG2_BLKSZ), sua_pos,
|
||
sua_size, sua))
|
||
{
|
||
grub_free (sua);
|
||
return grub_error (GRUB_ERR_BAD_FS, "not a ISO9660 filesystem");
|
||
}
|
||
|
||
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)
|
||
{
|
||
struct grub_fshelp_node rootnode;
|
||
|
||
rootnode.data = data;
|
||
rootnode.alloc_dirents = 0;
|
||
rootnode.have_dirents = 1;
|
||
rootnode.symlink = 0;
|
||
rootnode.dirents[0] = data->voldesc.rootdir;
|
||
|
||
/* 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 (&rootnode,
|
||
sua_pos, sua_size, susp_iterate))
|
||
{
|
||
grub_free (sua);
|
||
return grub_errno;
|
||
}
|
||
}
|
||
grub_free (sua);
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
static struct grub_iso9660_data *
|
||
grub_iso9660_mount (grub_disk_t disk)
|
||
{
|
||
struct grub_iso9660_data *data = 0;
|
||
struct grub_iso9660_primary_voldesc voldesc;
|
||
int block;
|
||
|
||
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 (!data->rockridge
|
||
&& (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));
|
||
if (set_rockridge (data))
|
||
goto fail;
|
||
}
|
||
|
||
block++;
|
||
} while (voldesc.voldesc.type != GRUB_ISO9660_VOLDESC_END);
|
||
|
||
return data;
|
||
|
||
fail:
|
||
grub_free (data);
|
||
return 0;
|
||
}
|
||
|
||
|
||
static char *
|
||
grub_iso9660_read_symlink (grub_fshelp_node_t node)
|
||
{
|
||
return node->symlink ? grub_strdup (node->symlink) : grub_strdup ("");
|
||
}
|
||
|
||
static grub_off_t
|
||
get_node_size (grub_fshelp_node_t node)
|
||
{
|
||
grub_off_t ret = 0;
|
||
grub_size_t i;
|
||
|
||
for (i = 0; i < node->have_dirents; i++)
|
||
ret += grub_le_to_cpu32 (node->dirents[i].size);
|
||
return ret;
|
||
}
|
||
|
||
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;
|
||
grub_off_t offset = 0;
|
||
char *filename = 0;
|
||
int filename_alloc = 0;
|
||
enum grub_fshelp_filetype type;
|
||
grub_off_t len;
|
||
char *symlink = 0;
|
||
|
||
auto void add_part (const char *part, int len);
|
||
|
||
/* Extend the symlink. */
|
||
void add_part (const char *part, int len2)
|
||
{
|
||
int size = symlink ? grub_strlen (symlink) : 0;
|
||
|
||
symlink = grub_realloc (symlink, size + len2 + 1);
|
||
if (! symlink)
|
||
return;
|
||
|
||
symlink[size] = 0;
|
||
grub_strncat (symlink, part, len2);
|
||
}
|
||
|
||
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 if (entry->len >= 5)
|
||
{
|
||
grub_size_t size = 1, csize = 1;
|
||
char *old;
|
||
csize = size = entry->len - 5;
|
||
old = filename;
|
||
if (filename_alloc)
|
||
{
|
||
size += grub_strlen (filename);
|
||
filename = grub_realloc (filename, size + 1);
|
||
}
|
||
else
|
||
{
|
||
filename_alloc = 1;
|
||
filename = grub_zalloc (size + 1);
|
||
filename[0] = 0;
|
||
}
|
||
if (!filename)
|
||
{
|
||
filename = old;
|
||
return grub_errno;
|
||
}
|
||
filename_alloc = 1;
|
||
grub_strncat (filename, (char *) &entry->data[1], csize);
|
||
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;
|
||
}
|
||
}
|
||
else 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 + sizeof (*entry) < grub_le_to_cpu32 (entry->len))
|
||
{
|
||
/* 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'. */
|
||
if (symlink && (entry->data[pos] & 1))
|
||
add_part ("/", 1);
|
||
add_part ((char *) &entry->data[pos + 2],
|
||
entry->data[pos + 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;
|
||
}
|
||
|
||
len = get_node_size (dir);
|
||
|
||
for (; offset < len; offset += dirent.len)
|
||
{
|
||
symlink = 0;
|
||
|
||
if (read_node (dir, offset, 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, sua_off, sua_size,
|
||
susp_iterate_dir))
|
||
return 0;
|
||
|
||
/* Read the name. */
|
||
if (read_node (dir, nameoffset, dirent.namelen, (char *) name))
|
||
return 0;
|
||
|
||
node = grub_malloc (sizeof (struct grub_fshelp_node));
|
||
if (!node)
|
||
return 0;
|
||
|
||
node->alloc_dirents = ARRAY_SIZE (node->dirents);
|
||
node->have_dirents = 1;
|
||
|
||
/* Setup a new node. */
|
||
node->data = dir->data;
|
||
node->symlink = symlink;
|
||
|
||
/* If the filetype was not stored using rockridge, use
|
||
whatever is stored in the iso9660 filesystem. */
|
||
if (type == GRUB_FSHELP_UNKNOWN)
|
||
{
|
||
if ((dirent.flags & FLAG_TYPE) == FLAG_TYPE_DIR)
|
||
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';
|
||
|
||
/* . and .. */
|
||
if (dirent.namelen == 1 && (name[0] == 0 || name[0] == 1))
|
||
{
|
||
grub_free (node);
|
||
continue;
|
||
}
|
||
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;
|
||
}
|
||
|
||
node->dirents[0] = dirent;
|
||
while (dirent.flags & FLAG_MORE_EXTENTS)
|
||
{
|
||
offset += dirent.len;
|
||
if (read_node (dir, offset, sizeof (dirent), (char *) &dirent))
|
||
{
|
||
if (filename_alloc)
|
||
grub_free (filename);
|
||
grub_free (node);
|
||
return 0;
|
||
}
|
||
if (node->have_dirents >= node->alloc_dirents)
|
||
{
|
||
struct grub_fshelp_node *new_node;
|
||
node->alloc_dirents *= 2;
|
||
new_node = grub_malloc (sizeof (struct grub_fshelp_node)
|
||
+ ((node->alloc_dirents
|
||
- ARRAY_SIZE (node->dirents))
|
||
* sizeof (node->dirents[0])));
|
||
if (!new_node)
|
||
{
|
||
if (filename_alloc)
|
||
grub_free (filename);
|
||
grub_free (node);
|
||
return 0;
|
||
}
|
||
}
|
||
node->dirents[node->have_dirents++] = dirent;
|
||
}
|
||
if (hook (filename, type, node))
|
||
{
|
||
if (filename_alloc)
|
||
grub_free (filename);
|
||
return 1;
|
||
}
|
||
if (filename_alloc)
|
||
grub_free (filename);
|
||
}
|
||
}
|
||
|
||
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);
|
||
info.mtimeset = !!iso9660_to_unixtime2 (&node->dirents[0].mtime, &info.mtime);
|
||
|
||
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.alloc_dirents = 0;
|
||
rootnode.have_dirents = 1;
|
||
rootnode.symlink = 0;
|
||
rootnode.dirents[0] = data->voldesc.rootdir;
|
||
|
||
/* 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.alloc_dirents = 0;
|
||
rootnode.have_dirents = 1;
|
||
rootnode.symlink = 0;
|
||
rootnode.dirents[0] = data->voldesc.rootdir;
|
||
|
||
/* 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->node = foundnode;
|
||
file->data = data;
|
||
file->size = get_node_size (foundnode);
|
||
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;
|
||
read_node (data->node, 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)
|
||
{
|
||
struct grub_iso9660_data *data =
|
||
(struct grub_iso9660_data *) file->data;
|
||
grub_free (data->node);
|
||
grub_free (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;
|
||
}
|
||
|
||
/* Get writing time of filesystem. */
|
||
static grub_err_t
|
||
grub_iso9660_mtime (grub_device_t device, grub_int32_t *timebuf)
|
||
{
|
||
struct grub_iso9660_data *data;
|
||
grub_disk_t disk = device->disk;
|
||
grub_err_t err;
|
||
|
||
grub_dl_ref (my_mod);
|
||
|
||
data = grub_iso9660_mount (disk);
|
||
if (!data)
|
||
{
|
||
grub_dl_unref (my_mod);
|
||
return grub_errno;
|
||
}
|
||
err = iso9660_to_unixtime (&data->voldesc.modified, timebuf);
|
||
|
||
grub_dl_unref (my_mod);
|
||
|
||
grub_free (data);
|
||
|
||
return err;
|
||
}
|
||
|
||
|
||
|
||
|
||
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,
|
||
.mtime = grub_iso9660_mtime,
|
||
.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);
|
||
}
|