76eac44af3
Historically this variable hold previous value of filename that had to be freed if allocated previously. Currently this branch is entered only if filename was not allocated previously so it became redundant. It did not cause real problems because grub_free was not called, but code is confusing and causes compilation error in some cases.
1125 lines
28 KiB
C
1125 lines
28 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;
|
||
} GRUB_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;
|
||
} GRUB_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];
|
||
#define MAX_NAMELEN 255
|
||
grub_uint8_t namelen;
|
||
} GRUB_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;
|
||
} GRUB_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;
|
||
} GRUB_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];
|
||
} GRUB_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];
|
||
} GRUB_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;
|
||
} GRUB_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;
|
||
int have_symlink;
|
||
struct grub_iso9660_dir dirents[8];
|
||
char symlink[0];
|
||
};
|
||
|
||
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, void *hook_arg),
|
||
void *hook_arg)
|
||
{
|
||
char *sua;
|
||
struct grub_iso9660_susp_entry *entry;
|
||
grub_err_t err;
|
||
|
||
if (sua_size <= 0)
|
||
return GRUB_ERR_NONE;
|
||
|
||
sua = grub_malloc (sua_size);
|
||
if (!sua)
|
||
return grub_errno;
|
||
|
||
/* Load a part of the System Usage Area. */
|
||
err = read_node (node, off, sua_size, sua);
|
||
if (err)
|
||
return err;
|
||
|
||
for (entry = (struct grub_iso9660_susp_entry *) sua; (char *) entry < (char *) sua + sua_size - 1 && entry->len > 0;
|
||
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;
|
||
grub_disk_addr_t ce_block;
|
||
|
||
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);
|
||
sua = grub_malloc (sua_size);
|
||
if (!sua)
|
||
return grub_errno;
|
||
|
||
/* Load a part of the System Usage Area. */
|
||
err = grub_disk_read (node->data->disk, ce_block, off,
|
||
sua_size, sua);
|
||
if (err)
|
||
return err;
|
||
|
||
entry = (struct grub_iso9660_susp_entry *) sua;
|
||
}
|
||
|
||
if (hook (entry, hook_arg))
|
||
{
|
||
grub_free (sua);
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
grub_free (sua);
|
||
return 0;
|
||
}
|
||
|
||
static char *
|
||
grub_iso9660_convert_string (grub_uint8_t *us, int len)
|
||
{
|
||
char *p;
|
||
int i;
|
||
grub_uint16_t t[MAX_NAMELEN / 2 + 1];
|
||
|
||
p = grub_malloc (len * GRUB_MAX_UTF8_PER_UTF16 + 1);
|
||
if (! p)
|
||
return NULL;
|
||
|
||
for (i=0; i<len; i++)
|
||
t[i] = grub_be_to_cpu16 (grub_get_unaligned16 (us + 2 * i));
|
||
|
||
*grub_utf16_to_utf8 ((grub_uint8_t *) p, t, len) = '\0';
|
||
|
||
return p;
|
||
}
|
||
|
||
static grub_err_t
|
||
susp_iterate_set_rockridge (struct grub_iso9660_susp_entry *susp_entry,
|
||
void *_data)
|
||
{
|
||
struct grub_iso9660_data *data = _data;
|
||
/* 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;
|
||
}
|
||
|
||
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;
|
||
|
||
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 = ARRAY_SIZE (rootnode.dirents);
|
||
rootnode.have_dirents = 1;
|
||
rootnode.have_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_set_rockridge,
|
||
data))
|
||
{
|
||
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->have_symlink
|
||
? grub_strdup (node->symlink
|
||
+ (node->have_dirents) * sizeof (node->dirents[0])
|
||
- sizeof (node->dirents)) : 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;
|
||
}
|
||
|
||
struct iterate_dir_ctx
|
||
{
|
||
char *filename;
|
||
int filename_alloc;
|
||
enum grub_fshelp_filetype type;
|
||
char *symlink;
|
||
int was_continue;
|
||
};
|
||
|
||
/* Extend the symlink. */
|
||
static void
|
||
add_part (struct iterate_dir_ctx *ctx,
|
||
const char *part,
|
||
int len2)
|
||
{
|
||
int size = ctx->symlink ? grub_strlen (ctx->symlink) : 0;
|
||
|
||
ctx->symlink = grub_realloc (ctx->symlink, size + len2 + 1);
|
||
if (! ctx->symlink)
|
||
return;
|
||
|
||
grub_memcpy (ctx->symlink + size, part, len2);
|
||
ctx->symlink[size + len2] = 0;
|
||
}
|
||
|
||
static grub_err_t
|
||
susp_iterate_dir (struct grub_iso9660_susp_entry *entry,
|
||
void *_ctx)
|
||
{
|
||
struct iterate_dir_ctx *ctx = _ctx;
|
||
|
||
/* 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. */
|
||
/* FIXME: Fix this slightly improper cast. */
|
||
if (entry->data[0] & GRUB_ISO9660_RR_DOT)
|
||
ctx->filename = (char *) ".";
|
||
else if (entry->data[0] & GRUB_ISO9660_RR_DOTDOT)
|
||
ctx->filename = (char *) "..";
|
||
else if (entry->len >= 5)
|
||
{
|
||
grub_size_t off = 0, csize = 1;
|
||
char *old;
|
||
csize = entry->len - 5;
|
||
old = ctx->filename;
|
||
if (ctx->filename_alloc)
|
||
{
|
||
off = grub_strlen (ctx->filename);
|
||
ctx->filename = grub_realloc (ctx->filename, csize + off + 1);
|
||
}
|
||
else
|
||
{
|
||
off = 0;
|
||
ctx->filename = grub_zalloc (csize + 1);
|
||
}
|
||
if (!ctx->filename)
|
||
{
|
||
ctx->filename = old;
|
||
return grub_errno;
|
||
}
|
||
ctx->filename_alloc = 1;
|
||
grub_memcpy (ctx->filename + off, (char *) &entry->data[1], csize);
|
||
ctx->filename[off + csize] = '\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:
|
||
ctx->type = GRUB_FSHELP_DIR;
|
||
break;
|
||
case GRUB_ISO9660_FSTYPE_REG:
|
||
ctx->type = GRUB_FSHELP_REG;
|
||
break;
|
||
case GRUB_ISO9660_FSTYPE_SYMLINK:
|
||
ctx->type = GRUB_FSHELP_SYMLINK;
|
||
break;
|
||
default:
|
||
ctx->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) < 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 (ctx->symlink && !ctx->was_continue)
|
||
add_part (ctx, "/", 1);
|
||
add_part (ctx, (char *) &entry->data[pos + 2],
|
||
entry->data[pos + 1]);
|
||
ctx->was_continue = (entry->data[pos] & 1);
|
||
break;
|
||
}
|
||
|
||
case 2:
|
||
add_part (ctx, "./", 2);
|
||
break;
|
||
|
||
case 4:
|
||
add_part (ctx, "../", 3);
|
||
break;
|
||
|
||
case 8:
|
||
add_part (ctx, "/", 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;
|
||
}
|
||
|
||
static int
|
||
grub_iso9660_iterate_dir (grub_fshelp_node_t dir,
|
||
grub_fshelp_iterate_dir_hook_t hook, void *hook_data)
|
||
{
|
||
struct grub_iso9660_dir dirent;
|
||
grub_off_t offset = 0;
|
||
grub_off_t len;
|
||
struct iterate_dir_ctx ctx;
|
||
|
||
len = get_node_size (dir);
|
||
|
||
for (; offset < len; offset += dirent.len)
|
||
{
|
||
ctx.symlink = 0;
|
||
ctx.was_continue = 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[MAX_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;
|
||
|
||
ctx.filename = 0;
|
||
ctx.filename_alloc = 0;
|
||
ctx.type = GRUB_FSHELP_UNKNOWN;
|
||
|
||
if (dir->data->rockridge
|
||
&& grub_iso9660_susp_iterate (dir, sua_off, sua_size,
|
||
susp_iterate_dir, &ctx))
|
||
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->have_symlink = 0;
|
||
|
||
/* If the filetype was not stored using rockridge, use
|
||
whatever is stored in the iso9660 filesystem. */
|
||
if (ctx.type == GRUB_FSHELP_UNKNOWN)
|
||
{
|
||
if ((dirent.flags & FLAG_TYPE) == FLAG_TYPE_DIR)
|
||
ctx.type = GRUB_FSHELP_DIR;
|
||
else
|
||
ctx.type = GRUB_FSHELP_REG;
|
||
}
|
||
|
||
/* . and .. */
|
||
if (!ctx.filename && dirent.namelen == 1 && name[0] == 0)
|
||
ctx.filename = (char *) ".";
|
||
|
||
if (!ctx.filename && dirent.namelen == 1 && name[0] == 1)
|
||
ctx.filename = (char *) "..";
|
||
|
||
/* The filename was not stored in a rock ridge entry. Read it
|
||
from the iso9660 filesystem. */
|
||
if (!dir->data->joliet && !ctx.filename)
|
||
{
|
||
char *ptr;
|
||
name[dirent.namelen] = '\0';
|
||
ctx.filename = grub_strrchr (name, ';');
|
||
if (ctx.filename)
|
||
*ctx.filename = '\0';
|
||
/* ISO9660 names are not case-preserving. */
|
||
ctx.type |= GRUB_FSHELP_CASE_INSENSITIVE;
|
||
for (ptr = name; *ptr; ptr++)
|
||
*ptr = grub_tolower (*ptr);
|
||
if (ptr != name && *(ptr - 1) == '.')
|
||
*(ptr - 1) = 0;
|
||
ctx.filename = name;
|
||
}
|
||
|
||
if (dir->data->joliet && !ctx.filename)
|
||
{
|
||
char *semicolon;
|
||
|
||
ctx.filename = grub_iso9660_convert_string
|
||
((grub_uint8_t *) name, dirent.namelen >> 1);
|
||
|
||
semicolon = grub_strrchr (ctx.filename, ';');
|
||
if (semicolon)
|
||
*semicolon = '\0';
|
||
|
||
ctx.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 (ctx.filename_alloc)
|
||
grub_free (ctx.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_realloc (node,
|
||
sizeof (struct grub_fshelp_node)
|
||
+ ((node->alloc_dirents
|
||
- ARRAY_SIZE (node->dirents))
|
||
* sizeof (node->dirents[0])));
|
||
if (!new_node)
|
||
{
|
||
if (ctx.filename_alloc)
|
||
grub_free (ctx.filename);
|
||
grub_free (node);
|
||
return 0;
|
||
}
|
||
node = new_node;
|
||
}
|
||
node->dirents[node->have_dirents++] = dirent;
|
||
}
|
||
if (ctx.symlink)
|
||
{
|
||
if ((node->alloc_dirents - node->have_dirents)
|
||
* sizeof (node->dirents[0]) < grub_strlen (ctx.symlink) + 1)
|
||
{
|
||
struct grub_fshelp_node *new_node;
|
||
new_node = grub_realloc (node,
|
||
sizeof (struct grub_fshelp_node)
|
||
+ ((node->alloc_dirents
|
||
- ARRAY_SIZE (node->dirents))
|
||
* sizeof (node->dirents[0]))
|
||
+ grub_strlen (ctx.symlink) + 1);
|
||
if (!new_node)
|
||
{
|
||
if (ctx.filename_alloc)
|
||
grub_free (ctx.filename);
|
||
grub_free (node);
|
||
return 0;
|
||
}
|
||
node = new_node;
|
||
}
|
||
node->have_symlink = 1;
|
||
grub_strcpy (node->symlink
|
||
+ node->have_dirents * sizeof (node->dirents[0])
|
||
- sizeof (node->dirents), ctx.symlink);
|
||
grub_free (ctx.symlink);
|
||
ctx.symlink = 0;
|
||
ctx.was_continue = 0;
|
||
}
|
||
if (hook (ctx.filename, ctx.type, node, hook_data))
|
||
{
|
||
if (ctx.filename_alloc)
|
||
grub_free (ctx.filename);
|
||
return 1;
|
||
}
|
||
if (ctx.filename_alloc)
|
||
grub_free (ctx.filename);
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
/* Context for grub_iso9660_dir. */
|
||
struct grub_iso9660_dir_ctx
|
||
{
|
||
grub_fs_dir_hook_t hook;
|
||
void *hook_data;
|
||
};
|
||
|
||
/* Helper for grub_iso9660_dir. */
|
||
static int
|
||
grub_iso9660_dir_iter (const char *filename,
|
||
enum grub_fshelp_filetype filetype,
|
||
grub_fshelp_node_t node, void *data)
|
||
{
|
||
struct grub_iso9660_dir_ctx *ctx = data;
|
||
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 ctx->hook (filename, &info, ctx->hook_data);
|
||
}
|
||
|
||
static grub_err_t
|
||
grub_iso9660_dir (grub_device_t device, const char *path,
|
||
grub_fs_dir_hook_t hook, void *hook_data)
|
||
{
|
||
struct grub_iso9660_dir_ctx ctx = { hook, hook_data };
|
||
struct grub_iso9660_data *data = 0;
|
||
struct grub_fshelp_node rootnode;
|
||
struct grub_fshelp_node *foundnode;
|
||
|
||
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.have_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, grub_iso9660_dir_iter, &ctx);
|
||
|
||
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.have_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;
|
||
grub_err_t err;
|
||
|
||
/* XXX: The file is stored in as a single extent. */
|
||
data->disk->read_hook = file->read_hook;
|
||
data->disk->read_hook_data = file->read_hook_data;
|
||
err = read_node (data->node, file->offset, len, buf);
|
||
data->disk->read_hook = NULL;
|
||
|
||
if (err || 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 (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,
|
||
#ifdef GRUB_UTIL
|
||
.reserved_first_sector = 1,
|
||
.blocklist_install = 1,
|
||
#endif
|
||
.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);
|
||
}
|