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Support for reading Joliet extensions.

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This commit is contained in:
Vreixo Formoso 2008-01-08 19:34:01 +01:00
parent 747bed11b8
commit aec6c8ce69
3 changed files with 100 additions and 22 deletions
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72
src/fs_image.c
View File

@ -73,11 +73,24 @@ typedef struct
char *input_charset; /**< Input charset for RR names */
char *local_charset; /**< For RR names, will be set to the locale one */
/**
* Will be filled with the block lba of the extend for the root directory
* of the hierarchy that will be read, either from the PVD (ISO, RR) or
* from the SVD (Joliet)
*/
uint32_t iso_root_block;
/**
* Will be filled with the block lba of the extend for the root directory,
* as read from the PVM
*/
uint32_t iso_root_block;
uint32_t pvd_root_block;
/**
* Will be filled with the block lba of the extend for the root directory,
* as read from the SVD
*/
uint32_t svd_root_block;
/**
* If we need to read RR extensions. i.e., if the image contains RR
@ -939,7 +952,7 @@ int iso_file_source_new_ifs(IsoImageFilesystem *fs, IsoFileSource *parent,
if (!name) {
size_t len;
if (record->file_id[0] == 0) {
if (record->len_fi[0] == 1 && record->file_id[0] == 0) {
/* "." entry, we can call this for root node, so... */
if (!(atts.st_mode & S_IFDIR)) {
iso_msg_sorry(fsdata->messenger, LIBISO_WRONG_IMG,
@ -948,6 +961,11 @@ int iso_file_source_new_ifs(IsoImageFilesystem *fs, IsoFileSource *parent,
}
} else {
name = fsdata->get_name((char*)record->file_id, record->len_fi[0]);
if (name == NULL) {
iso_msg_sorry(fsdata->messenger, LIBISO_WRONG_IMG,
"Can't retrieve file name");
return ISO_WRONG_ECMA119;
}
/* remove trailing version number */
len = strlen(name);
@ -1467,7 +1485,7 @@ int read_pvm(_ImageFsData *data, uint32_t block)
data->nblocks = iso_read_bb(pvm->vol_space_size, 4, NULL);
rootdr = (struct ecma119_dir_record*) pvm->root_dir_record;
data->iso_root_block = iso_read_bb(rootdr->block, 4, NULL);
data->pvd_root_block = iso_read_bb(rootdr->block, 4, NULL);
/*
* TODO
@ -1576,9 +1594,29 @@ int iso_image_filesystem_new(IsoDataSource *src, struct iso_read_opts *opts,
break;
case 2:
/* suplementary volume descritor */
// TODO support Joliet
{
struct ecma119_sup_vol_desc *sup;
struct ecma119_dir_record *root;
sup = (struct ecma119_sup_vol_desc*)buffer;
if (sup->esc_sequences[0] == 0x25 &&
sup->esc_sequences[1] == 0x2F &&
(sup->esc_sequences[2] == 0x40 ||
sup->esc_sequences[2] == 0x43 ||
sup->esc_sequences[2] == 0x45) ) {
/* it's a Joliet Sup. Vol. Desc. */
data->joliet = 1;
root = (struct ecma119_dir_record*)sup->root_dir_record;
data->svd_root_block = iso_read_bb(root->block, 4, NULL);
//TODO maybe we can set the IsoImage attribs from this
//descriptor
} else {
iso_msg_hint(data->messenger, LIBISO_UNSUPPORTED_VD,
"Joliet extensions not supported yet");
"Unsupported (not Joliet) Sup. Vol. Desc found.");
}
}
break;
case 255:
/*
@ -1597,7 +1635,7 @@ int iso_image_filesystem_new(IsoDataSource *src, struct iso_read_opts *opts,
} while (buffer[0] != 255);
/* 4. check if RR extensions are being used */
ret = read_root_susp_entries(data, data->iso_root_block);
ret = read_root_susp_entries(data, data->pvd_root_block);
if (ret < 0) {
return ret;
}
@ -1612,35 +1650,29 @@ int iso_image_filesystem_new(IsoDataSource *src, struct iso_read_opts *opts,
/* select what tree to read */
if (data->rr) {
/* RR extensions are available */
if (opts->preferjoliet && data->joliet) {
if (!opts->nojoliet && opts->preferjoliet && data->joliet) {
/* if user prefers joliet, that is used */
iso_msg_debug(data->messenger, "Reading Joliet extensions.");
//data->get_name = ucs2str;
data->get_name = ucs2str;
data->rr = RR_EXT_NO;
//data->root_dir_block = joliet root
/* root_dir_block already contains root for joliet */
//TODO add joliet support
goto fs_cleanup;
data->iso_root_block = data->svd_root_block;
} else {
/* RR will be used */
iso_msg_debug(data->messenger, "Reading Rock Ridge extensions.");
//data->root_dir_block = info.iso_root_block;
data->iso_root_block = data->pvd_root_block;
data->get_name = strcopy;
}
} else {
/* RR extensions are not available */
if (opts->preferjoliet && data->joliet) {
if (!opts->nojoliet && data->joliet) {
/* joliet will be used */
iso_msg_debug(data->messenger, "Reading Joliet extensions.");
//data->get_name = ucs2str;
//data->root_dir_block = joliet root
/* root_dir_block already contains root for joliet */
//TODO add joliet support
goto fs_cleanup;
data->get_name = ucs2str;
data->iso_root_block = data->svd_root_block;
} else {
/* default to plain iso */
iso_msg_debug(data->messenger, "Reading plain ISO-9660 tree.");
//data->root_dir_block = info.iso_root_block;
data->iso_root_block = data->pvd_root_block;
data->get_name = strcopy;
}
}

42
src/util.c
View File

@ -18,8 +18,10 @@
#include <ctype.h>
#include <stdio.h>
#include <limits.h>
#include <locale.h>
#include <langinfo.h>
/* for eaccess, define in unistd.h */
/* for eaccess, defined in unistd.h */
#define __USE_GNU
#include <unistd.h>
@ -921,3 +923,41 @@ char *strcopy(const char *buf, size_t len)
return str;
}
char *ucs2str(const char *buf, size_t len)
{
size_t outbytes, inbytes;
char *str, *src, *out;
iconv_t conv;
size_t n;
inbytes = len;
outbytes = (inbytes+1) * MB_LEN_MAX;
/* ensure enought space */
out = alloca(outbytes);
/* convert to local charset */
setlocale(LC_CTYPE, "");
conv = iconv_open(nl_langinfo(CODESET), "UCS-2BE");
if (conv == (iconv_t)(-1)) {
return NULL;
}
src = (char *)buf;
str = (char *)out;
n = iconv(conv, &src, &inbytes, &str, &outbytes);
if (n == -1) {
/* error */
iconv_close(conv);
return NULL;
}
iconv_close(conv);
*str = '\0';
/* remove trailing spaces */
for (len = strlen(out) - 1; out[len] == ' ' && len > 0; --len)
out[len] = '\0';
return strdup(out);
}

6
src/util.h
View File

@ -209,6 +209,12 @@ int iso_eaccess(const char *path);
*/
char *strcopy(const char *buf, size_t len);
/**
* Convert a Joliet string with a length of \p len bytes to a new string
* in local charset.
*/
char *ucs2str(const char *buf, size_t len);
typedef struct iso_rbtree IsoRBTree;
/**