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Prevented that non-MD5 nodes from old image get an MD5 in appended session.

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This commit is contained in:
Thomas Schmitt 2009-08-11 21:08:15 +02:00
parent fd124c82d2
commit ecf2ca044e
5 changed files with 41 additions and 18 deletions
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27
libisofs/ecma119.c
View File

@ -896,20 +896,24 @@ int checksum_prepare_image(IsoImage *src, int flag)
@flag bit0= recursion
*/
static
int checksum_prepare_nodes(IsoImage *img, IsoNode *node, int flag)
int checksum_prepare_nodes(Ecma119Image *target, IsoNode *node, int flag)
{
IsoNode *pos;
IsoFile *file;
int ret, i;
IsoImage *img;
int ret, i, no_md5 = 0;
size_t value_length;
unsigned int idx = 0;
char *value;
void *xipt = NULL;
img= target->image;
if (node->type == LIBISO_FILE) {
file = (IsoFile *) node;
if (file->from_old_session) {
/* Save eventual MD5 data of files from old image */
if (file->from_old_session && target->appendable) {
/* Save MD5 data of files from old image which will not
be copied and have an MD5 recorded in the old image. */
value= NULL;
ret = iso_node_lookup_attr(node, "isofs.cx", &value_length,
&value, 0);
@ -924,18 +928,25 @@ int checksum_prepare_nodes(IsoImage *img, IsoNode *node, int flag)
xipt);
if (ret < 0)
return ret;
}
} else
no_md5 = 1;
} else {
no_md5 = 1;
}
if (value != NULL)
free(value);
}
/* Equip all nodes with provisory isofs.cx numbers: 4 byte, all 0. */
/* Equip nodes with provisory isofs.cx numbers: 4 byte, all 0.
Omit those from old image which will not be copied and have no MD5.
*/
if (!no_md5) {
ret = iso_file_set_isofscx(file, (unsigned int) 0, 0);
if (ret < 0)
return ret;
}
} else if (node->type == LIBISO_DIR) {
for (pos = ((IsoDir *) node)->children; pos != NULL; pos = pos->next) {
ret = checksum_prepare_nodes(img, pos, 1);
ret = checksum_prepare_nodes(target, pos, 1);
if (ret < 0)
return ret;
}
@ -1081,7 +1092,7 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
if (ret < 0)
return ret;
if (target->appendable) {
ret = checksum_prepare_nodes(src, (IsoNode *) src->root, 0);
ret = checksum_prepare_nodes(target, (IsoNode *) src->root, 0);
if (ret < 0)
return ret;
}

14
libisofs/filesrc.c
View File

@ -49,7 +49,8 @@ int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src)
ino_t ino_id;
#ifdef Libisofs_with_checksumS
int cret;
int cret, no_md5= 0;
void *xipt = NULL;
#endif
if (img == NULL || file == NULL || src == NULL) {
@ -99,7 +100,7 @@ int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src)
#ifdef Libisofs_with_checksumS
if (ret == 0) {
if (ret == 0 && (*src)->checksum_index > 0) {
/* Duplicate file source was mapped to previously registered source
*/
cret = iso_file_set_isofscx(file, (*src)->checksum_index, 0);
@ -117,7 +118,14 @@ int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src)
#ifdef Libisofs_with_checksumS
if(img->md5_file_checksums) {
if (img->md5_file_checksums && file->from_old_session && img->appendable) {
/* Omit MD5 indexing with old image nodes which have no MD5 */
ret = iso_node_get_xinfo((IsoNode *) file, checksum_xinfo_func, &xipt);
if (ret <= 0)
no_md5 = 1;
}
if (img->md5_file_checksums && !no_md5) {
img->checksum_idx_counter++;
if (img->checksum_idx_counter < 0x80000000) {
fsrc->checksum_index= img->checksum_idx_counter;

3
libisofs/libisofs.h
View File

@ -5033,7 +5033,8 @@ int iso_image_get_session_md5(IsoImage *image, uint32_t *start_lba,
* @param md5
* Eventually returns 16 byte of MD5 checksum
* @param flag
* Bitfield for control purposes, unused yet, submit 0
* Bitfield for control purposes
* bit0= only determine return value, do not touch parameter md5
* @return
* 1= md5 found , 0= no md5 available , <0 indicates error
*

2
libisofs/md5.c
View File

@ -427,7 +427,7 @@ int checksum_copy_old_nodes(Ecma119Image *target, IsoNode *node, int flag)
if (node->type == LIBISO_FILE) {
file = (IsoFile *) node;
if (file->from_old_session) {
if (file->from_old_session && target->appendable) {
ret = iso_node_get_xinfo(node, checksum_xinfo_func, &xipt);
if (ret <= 0)
return ret;

7
libisofs/node.c
View File

@ -2696,8 +2696,11 @@ int iso_file_get_md5(IsoImage *image, IsoFile *file, char md5[16], int flag)
ret = 0;
goto ex;
}
memcpy(md5, image->checksum_array + ((size_t) 16) * ((size_t) idx), 16);
ret = ISO_SUCCESS;
if (!(flag & 1)) {
memcpy(md5, image->checksum_array + ((size_t) 16) * ((size_t) idx),
16);
}
ret = 1;
ex:;
if (value != NULL)
free(value);