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Custom create_node() builder function to deal with old image files.

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This commit is contained in:
Vreixo Formoso
2008-01-03 19:47:44 +01:00
parent 58a7d8e853
commit 193fbaef8b
1 changed files with 211 additions and 10 deletions
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221
src/fs_image.c
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@ -20,6 +20,7 @@
#include <stdlib.h>
#include <string.h>
#include <limits.h>
static int ifs_fs_open(IsoImageFilesystem *fs);
@ -1585,6 +1586,163 @@ int iso_image_filesystem_new(IsoDataSource *src, struct iso_read_opts *opts,
return ret;
}
static
int image_builder_create_node(IsoNodeBuilder *builder, IsoImage *image,
IsoFileSource *src, IsoNode **node)
{
int result;
struct stat info;
IsoNode *new;
char *name;
ImageFileSourceData *data;
if (builder == NULL || src == NULL || node == NULL || src->data == NULL) {
return ISO_NULL_POINTER;
}
data = (ImageFileSourceData*)src->data;
name = iso_file_source_get_name(src);
/* get info about source */
result = iso_file_source_lstat(src, &info);
if (result < 0) {
return result;
}
new = NULL;
switch (info.st_mode & S_IFMT) {
case S_IFREG:
{
/* source is a regular file */
IsoStream *stream;
IsoFile *file;
result = iso_file_source_stream_new(src, &stream);
if (result < 0) {
free(name);
return result;
}
/* take a ref to the src, as stream has taken our ref */
iso_file_source_ref(src);
file = calloc(1, sizeof(IsoFile));
if (file == NULL) {
free(name);
iso_stream_unref(stream);
return ISO_MEM_ERROR;
}
/* the msblock is taken from the image */
file->msblock = data->block;
/*
* and we set the sort weight based on the block on image, to
* improve performance on image modifying.
*/
file->sort_weight = INT_MAX - data->block;
file->stream = stream;
file->node.type = LIBISO_FILE;
new = (IsoNode*) file;
}
break;
case S_IFDIR:
{
/* source is a directory */
new = calloc(1, sizeof(IsoDir));
if (new == NULL) {
free(name);
return ISO_MEM_ERROR;
}
new->type = LIBISO_DIR;
}
break;
case S_IFLNK:
{
/* source is a symbolic link */
char dest[PATH_MAX];
IsoSymlink *link;
result = iso_file_source_readlink(src, dest, PATH_MAX);
if (result < 0) {
free(name);
return result;
}
link = malloc(sizeof(IsoSymlink));
if (link == NULL) {
free(name);
return ISO_MEM_ERROR;
}
link->dest = strdup(dest);
link->node.type = LIBISO_SYMLINK;
new = (IsoNode*) link;
}
break;
case S_IFSOCK:
case S_IFBLK:
case S_IFCHR:
case S_IFIFO:
{
/* source is an special file */
IsoSpecial *special;
special = malloc(sizeof(IsoSpecial));
if (special == NULL) {
free(name);
return ISO_MEM_ERROR;
}
special->dev = info.st_rdev;
special->node.type = LIBISO_SPECIAL;
new = (IsoNode*) special;
}
break;
}
/* fill fields */
new->refcount = 1;
new->name = name;
new->mode = info.st_mode;
new->uid = info.st_uid;
new->gid = info.st_gid;
new->atime = info.st_atime;
new->mtime = info.st_mtime;
new->ctime = info.st_ctime;
new->hidden = 0;
new->parent = NULL;
new->next = NULL;
*node = new;
return ISO_SUCCESS;
}
/**
* Create a new builder, that is exactly a copy of an old builder, but where
* create_node() function has been replaced by image_builder_create_node.
*/
int iso_image_builder_new(IsoNodeBuilder *old, IsoNodeBuilder **builder)
{
IsoNodeBuilder *b;
if (builder == NULL) {
return ISO_NULL_POINTER;
}
b = malloc(sizeof(IsoNodeBuilder));
if (b == NULL) {
return ISO_MEM_ERROR;
}
b->refcount = 1;
b->create_file_data = old->create_file_data;
b->create_node_data = old->create_node_data;
b->create_file = old->create_file;
b->create_node = image_builder_create_node;
b->free = old->free;
*builder = b;
return ISO_SUCCESS;
}
int iso_image_import(IsoImage *image, IsoDataSource *src,
struct iso_read_opts *opts,
struct iso_read_image_features *features)
@ -1592,6 +1750,9 @@ int iso_image_import(IsoImage *image, IsoDataSource *src,
int ret;
IsoImageFilesystem *fs;
IsoFilesystem *fsback;
IsoNodeBuilder *blback;
IsoDir *oldroot;
IsoFileSource *newroot;
if (image == NULL || src == NULL || opts == NULL) {
return ISO_NULL_POINTER;
@ -1602,17 +1763,43 @@ int iso_image_import(IsoImage *image, IsoDataSource *src,
return ret;
}
/* backup image filesystem and builder */
fsback = image->fs;
//TODO
/* get root from filesystem */
ret = fs->fs.get_root((IsoFilesystem*)fs, &newroot);
if (ret < 0) {
return ret;
}
/* backup image filesystem, builder and root */
fsback = image->fs;
blback = image->builder;
oldroot = image->root;
/* create new builder */
ret = iso_image_builder_new(blback, &image->builder);
if (ret < 0) {
goto import_revert;
}
image->fs = (IsoFilesystem*)fs;
/* create new root, and set root attributes from source */
ret = iso_node_new_root(&image->root);
if (ret < 0) {
goto import_revert;
}
{
struct stat info;
/* I know this will not fail */
iso_file_source_lstat(newroot, &info);
image->root->node.mode = info.st_mode;
image->root->node.uid = info.st_uid;
image->root->node.gid = info.st_gid;
image->root->node.atime = info.st_atime;
image->root->node.mtime = info.st_mtime;
image->root->node.ctime = info.st_ctime;
}
/* remove root node */
/* recursively add image */
@ -1628,5 +1815,19 @@ int iso_image_import(IsoImage *image, IsoDataSource *src,
//TODO
return -1;
ret = ISO_SUCCESS;
goto import_cleanup;
import_revert:;
image->root = oldroot;
image->fs = fsback;
import_cleanup:;
iso_file_source_unref(newroot);
fs->close(fs);
iso_filesystem_unref((IsoFilesystem*)fs);
return ret;
}