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-rw-r--r--unpack/Makemodule.am3
-rw-r--r--unpack/rdsquashfs.c14
-rw-r--r--unpack/rdsquashfs.h20
-rw-r--r--unpack/read_fstree.c184
-rw-r--r--unpack/tree_node_from_inode.c143
5 files changed, 14 insertions, 350 deletions
diff --git a/unpack/Makemodule.am b/unpack/Makemodule.am
index 6829681..5f4269e 100644
--- a/unpack/Makemodule.am
+++ b/unpack/Makemodule.am
@@ -1,5 +1,4 @@
-rdsquashfs_SOURCES = unpack/rdsquashfs.c unpack/tree_node_from_inode.c
-rdsquashfs_SOURCES += unpack/rdsquashfs.h unpack/read_fstree.c
+rdsquashfs_SOURCES = unpack/rdsquashfs.c unpack/rdsquashfs.h
rdsquashfs_SOURCES += unpack/list_files.c unpack/extract_file.c
rdsquashfs_SOURCES += unpack/restore_fstree.c unpack/describe.c
rdsquashfs_LDADD = libsquashfs.a libfstree.a libcompress.a libutil.a
diff --git a/unpack/rdsquashfs.c b/unpack/rdsquashfs.c
index 11f0a32..81da226 100644
--- a/unpack/rdsquashfs.c
+++ b/unpack/rdsquashfs.c
@@ -177,16 +177,16 @@ int main(int argc, char **argv)
switch (i) {
case 'D':
- info.flags |= UNPACK_NO_DEVICES;
+ info.rdtree_flags |= RDTREE_NO_DEVICES;
break;
case 'S':
- info.flags |= UNPACK_NO_SOCKETS;
+ info.rdtree_flags |= RDTREE_NO_SOCKETS;
break;
case 'F':
- info.flags |= UNPACK_NO_FIFO;
+ info.rdtree_flags |= RDTREE_NO_FIFO;
break;
case 'L':
- info.flags |= UNPACK_NO_SLINKS;
+ info.rdtree_flags |= RDTREE_NO_SLINKS;
break;
case 'C':
info.flags |= UNPACK_CHMOD;
@@ -195,7 +195,7 @@ int main(int argc, char **argv)
info.flags |= UNPACK_CHOWN;
break;
case 'E':
- info.flags |= UNPACK_NO_EMPTY;
+ info.rdtree_flags |= RDTREE_NO_EMPTY;
break;
case 'c':
op = OP_CAT;
@@ -276,8 +276,10 @@ int main(int argc, char **argv)
goto out_cmp;
}
- if (read_fstree(&fs, &super, &info))
+ if (deserialize_fstree(&fs, &super, info.cmp,
+ info.sqfsfd, info.rdtree_flags)) {
goto out_cmp;
+ }
info.block_size = super.block_size;
diff --git a/unpack/rdsquashfs.h b/unpack/rdsquashfs.h
index f1cd131..a615bb5 100644
--- a/unpack/rdsquashfs.h
+++ b/unpack/rdsquashfs.h
@@ -4,6 +4,7 @@
#include "meta_reader.h"
#include "frag_reader.h"
+#include "highlevel.h"
#include "squashfs.h"
#include "compress.h"
#include "id_table.h"
@@ -20,20 +21,16 @@
#include <stdio.h>
enum UNPACK_FLAGS {
- UNPACK_NO_DEVICES = 0x01,
- UNPACK_NO_SOCKETS = 0x02,
- UNPACK_NO_FIFO = 0x04,
- UNPACK_NO_SLINKS = 0x08,
- UNPACK_NO_EMPTY = 0x10,
- UNPACK_CHMOD = 0x20,
- UNPACK_CHOWN = 0x40,
- UNPACK_QUIET = 0x80,
+ UNPACK_CHMOD = 0x01,
+ UNPACK_CHOWN = 0x02,
+ UNPACK_QUIET = 0x04,
};
typedef struct {
compressor_t *cmp;
size_t block_size;
frag_reader_t *frag;
+ int rdtree_flags;
int sqfsfd;
int flags;
@@ -41,13 +38,6 @@ typedef struct {
void *scratch;
} unsqfs_info_t;
-tree_node_t *tree_node_from_inode(sqfs_inode_generic_t *inode,
- const id_table_t *idtbl,
- const char *name,
- size_t block_size);
-
-int read_fstree(fstree_t *out, sqfs_super_t *super, unsqfs_info_t *info);
-
void list_files(tree_node_t *node);
int extract_file(file_info_t *fi, unsqfs_info_t *info, int outfd);
diff --git a/unpack/read_fstree.c b/unpack/read_fstree.c
deleted file mode 100644
index 544af83..0000000
--- a/unpack/read_fstree.c
+++ /dev/null
@@ -1,184 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-#include "rdsquashfs.h"
-
-
-static int should_skip(int type, int flags)
-{
- switch (type) {
- case SQFS_INODE_BDEV:
- case SQFS_INODE_CDEV:
- case SQFS_INODE_EXT_CDEV:
- case SQFS_INODE_EXT_BDEV:
- return (flags & UNPACK_NO_DEVICES);
- case SQFS_INODE_SLINK:
- case SQFS_INODE_EXT_SLINK:
- return (flags & UNPACK_NO_SLINKS);
- case SQFS_INODE_SOCKET:
- case SQFS_INODE_EXT_SOCKET:
- return(flags & UNPACK_NO_SOCKETS);
- case SQFS_INODE_FIFO:
- case SQFS_INODE_EXT_FIFO:
- return (flags & UNPACK_NO_FIFO);
- }
- return 0;
-}
-
-static int fill_dir(meta_reader_t *ir, meta_reader_t *dr, tree_node_t *root,
- sqfs_super_t *super, id_table_t *idtbl, int flags)
-{
- sqfs_inode_generic_t *inode;
- sqfs_dir_header_t hdr;
- sqfs_dir_entry_t *ent;
- tree_node_t *n, *prev;
- uint64_t block_start;
- size_t size, diff;
- uint32_t i;
-
- block_start = root->data.dir->start_block;
- block_start += super->directory_table_start;
-
- if (meta_reader_seek(dr, block_start, root->data.dir->block_offset))
- return -1;
-
- size = root->data.dir->size;
-
- while (size != 0) {
- if (meta_reader_read_dir_header(dr, &hdr))
- return -1;
-
- size -= sizeof(hdr) > size ? size : sizeof(hdr);
-
- for (i = 0; i <= hdr.count; ++i) {
- ent = meta_reader_read_dir_ent(dr);
- if (ent == NULL)
- return -1;
-
- diff = sizeof(*ent) + strlen((char *)ent->name);
- size -= diff > size ? size : diff;
-
- if (should_skip(ent->type, flags)) {
- free(ent);
- continue;
- }
-
- inode = meta_reader_read_inode(ir, super,
- hdr.start_block,
- ent->offset);
- if (inode == NULL) {
- free(ent);
- return -1;
- }
-
- n = tree_node_from_inode(inode, idtbl,
- (char *)ent->name,
- super->block_size);
- free(ent);
- free(inode);
-
- if (n == NULL)
- return -1;
-
- n->parent = root;
- n->next = root->data.dir->children;
- root->data.dir->children = n;
- }
- }
-
- n = root->data.dir->children;
- prev = NULL;
-
- while (n != NULL) {
- if (S_ISDIR(n->mode)) {
- if (fill_dir(ir, dr, n, super, idtbl, flags))
- return -1;
-
- if (n->data.dir->children == NULL &&
- (flags & UNPACK_NO_EMPTY)) {
- if (prev == NULL) {
- root->data.dir->children = n->next;
- free(n);
- n = root->data.dir->children;
- } else {
- prev->next = n->next;
- free(n);
- n = prev->next;
- }
- continue;
- }
- }
-
- prev = n;
- n = n->next;
- }
-
- return 0;
-}
-
-int read_fstree(fstree_t *out, sqfs_super_t *super, unsqfs_info_t *info)
-{
- sqfs_inode_generic_t *root;
- meta_reader_t *ir, *dr;
- uint64_t block_start;
- id_table_t idtbl;
- int status = -1;
- size_t offset;
-
- ir = meta_reader_create(info->sqfsfd, info->cmp);
- if (ir == NULL)
- return -1;
-
- dr = meta_reader_create(info->sqfsfd, info->cmp);
- if (dr == NULL)
- goto out_ir;
-
- if (id_table_init(&idtbl))
- goto out_dr;
-
- if (id_table_read(&idtbl, info->sqfsfd, super, info->cmp))
- goto out_id;
-
- block_start = super->root_inode_ref >> 16;
- offset = super->root_inode_ref & 0xFFFF;
- root = meta_reader_read_inode(ir, super, block_start, offset);
- if (root == NULL)
- goto out_id;
-
- if (root->base.type != SQFS_INODE_DIR &&
- root->base.type != SQFS_INODE_EXT_DIR) {
- free(root);
- fputs("File system root inode is not a directory inode!\n",
- stderr);
- goto out_id;
- }
-
- memset(out, 0, sizeof(*out));
- out->block_size = super->block_size;
- out->default_uid = 0;
- out->default_gid = 0;
- out->default_mode = 0755;
- out->default_mtime = super->modification_time;
-
- out->root = tree_node_from_inode(root, &idtbl, "", super->block_size);
- free(root);
- root = NULL;
-
- if (out->root == NULL)
- goto out_id;
-
- if (fill_dir(ir, dr, out->root, super, &idtbl, info->flags))
- goto fail_fs;
-
- fstree_sort(out);
-
- status = 0;
-out_id:
- id_table_cleanup(&idtbl);
-out_dr:
- meta_reader_destroy(dr);
-out_ir:
- meta_reader_destroy(ir);
- return status;
-fail_fs:
- fstree_cleanup(out);
- goto out_id;
-}
diff --git a/unpack/tree_node_from_inode.c b/unpack/tree_node_from_inode.c
deleted file mode 100644
index 0fd7da1..0000000
--- a/unpack/tree_node_from_inode.c
+++ /dev/null
@@ -1,143 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-#include "rdsquashfs.h"
-
-static size_t compute_size(sqfs_inode_generic_t *inode, const char *name,
- size_t block_size)
-{
- size_t size = sizeof(tree_node_t) + strlen(name) + 1;
- size_t block_count = 0;
-
- switch (inode->base.type) {
- case SQFS_INODE_DIR:
- case SQFS_INODE_EXT_DIR:
- size += sizeof(dir_info_t);
- break;
- case SQFS_INODE_FILE:
- size += sizeof(file_info_t);
- block_count = inode->data.file.file_size / block_size;
- break;
- case SQFS_INODE_EXT_FILE:
- size += sizeof(file_info_t);
- block_count = inode->data.file_ext.file_size / block_size;
- break;
- case SQFS_INODE_SLINK:
- case SQFS_INODE_EXT_SLINK:
- size += strlen(inode->slink_target) + 1;
- break;
- default:
- break;
- }
-
- return size + block_count * sizeof(uint32_t);
-}
-
-static void copy_block_sizes(sqfs_inode_generic_t *inode, tree_node_t *out,
- size_t block_size)
-{
- size_t block_count = out->data.file->size / block_size;
-
- out->name += block_count * sizeof(uint32_t);
-
- if (block_count) {
- memcpy(out->data.file->blocksizes, inode->block_sizes,
- block_count * sizeof(uint32_t));
- }
-}
-
-tree_node_t *tree_node_from_inode(sqfs_inode_generic_t *inode,
- const id_table_t *idtbl,
- const char *name,
- size_t block_size)
-{
- tree_node_t *out;
-
- if (inode->base.uid_idx >= idtbl->num_ids) {
- fputs("converting inode to fs tree node: UID out of range\n",
- stderr);
- return NULL;
- }
-
- if (inode->base.gid_idx >= idtbl->num_ids) {
- fputs("converting inode to fs tree node: GID out of range\n",
- stderr);
- return NULL;
- }
-
- out = calloc(1, compute_size(inode, name, block_size));
- if (out == NULL) {
- perror("converting inode to fs tree node");
- return NULL;
- }
-
- out->uid = idtbl->ids[inode->base.uid_idx];
- out->gid = idtbl->ids[inode->base.gid_idx];
- out->mode = inode->base.mode;
- out->inode_num = inode->base.inode_number;
- out->name = (char *)out->payload;
-
- switch (inode->base.type) {
- case SQFS_INODE_DIR:
- out->data.dir = (dir_info_t *)out->payload;
- out->name += sizeof(dir_info_t);
-
- out->data.dir->size = inode->data.dir.size;
- out->data.dir->start_block = inode->data.dir.start_block;
- out->data.dir->block_offset = inode->data.dir.offset;
- break;
- case SQFS_INODE_EXT_DIR:
- out->data.dir = (dir_info_t *)out->payload;
- out->name += sizeof(dir_info_t);
-
- out->data.dir->size = inode->data.dir_ext.size;
- out->data.dir->start_block = inode->data.dir_ext.start_block;
- out->data.dir->block_offset = inode->data.dir_ext.offset;
- break;
- case SQFS_INODE_FILE:
- out->data.file = (file_info_t *)out->payload;
- out->name += sizeof(file_info_t);
-
- out->data.file->size = inode->data.file.file_size;
- out->data.file->startblock = inode->data.file.blocks_start;
- out->data.file->fragment = inode->data.file.fragment_index;
- out->data.file->fragment_offset =
- inode->data.file.fragment_offset;
-
- copy_block_sizes(inode, out, block_size);
- break;
- case SQFS_INODE_EXT_FILE:
- out->data.file = (file_info_t *)out->payload;
- out->name += sizeof(file_info_t);
-
- out->data.file->size = inode->data.file_ext.file_size;
- out->data.file->startblock = inode->data.file_ext.blocks_start;
- out->data.file->fragment = inode->data.file_ext.fragment_idx;
- out->data.file->fragment_offset =
- inode->data.file_ext.fragment_offset;
-
- copy_block_sizes(inode, out, block_size);
- break;
- case SQFS_INODE_SLINK:
- case SQFS_INODE_EXT_SLINK:
- out->data.slink_target = (char *)out->payload;
- strcpy(out->data.slink_target, inode->slink_target);
-
- out->name = (char *)out->payload +
- strlen(inode->slink_target) + 1;
- break;
- case SQFS_INODE_BDEV:
- case SQFS_INODE_CDEV:
- out->name = (char *)out->payload;
- out->data.devno = inode->data.dev.devno;
- break;
- case SQFS_INODE_EXT_BDEV:
- case SQFS_INODE_EXT_CDEV:
- out->name = (char *)out->payload;
- out->data.devno = inode->data.dev_ext.devno;
- break;
- default:
- break;
- }
-
- strcpy(out->name, name);
- return out;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 18:23:59 +0000