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update_image.c
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update_image.c
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/*
* update_image.c - see description below
*/
/*
* Copyright (C) 2013, 2014 Eric Biggers
*
* This file is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at your option) any
* later version.
*
* This file 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this file; if not, see https://www.gnu.org/licenses/.
*/
/*
* This file contains the implementation of wimlib_update_image(), which is one
* of the two ways by which library users can make changes to a WIM image. (The
* other way is by mounting an image read-write.) wimlib_update_image() is also
* used in the implementation of wimlib_add_image(), since "create a WIM image
* from this directory tree" is equivalent to "create an empty WIM image, then
* update it to add this directory tree as the root".
*
* wimlib_update_image() processes a list of commands passed to it. Currently,
* the following types of commands are supported:
*
* - Add a directory tree from an external source (filesystem or NTFS volume).
* This can be used to add new files or to replace existing files.
* - Delete a file or directory tree.
* - Rename a file or directory tree.
*
* Not supported are creating links to existing files or changing metadata of
* existing files.
*
* wimlib_update_image() is atomic. If it cannot complete successfully, then
* all changes are rolled back and the WIMStruct is left unchanged. Rollback is
* implemented by breaking the commands into primitive operations such as "link
* this dentry tree here" which can be undone by doing the opposite operations
* in reverse order.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include "wimlib/alloca.h"
#include "wimlib/assert.h"
#include "wimlib/blob_table.h"
#include "wimlib/dentry.h"
#include "wimlib/encoding.h"
#include "wimlib/endianness.h"
#include "wimlib/error.h"
#include "wimlib/metadata.h"
#include "wimlib/paths.h"
#include "wimlib/progress.h"
#include "wimlib/scan.h"
#include "wimlib/test_support.h"
#include "wimlib/xml_windows.h"
/* Saved specification of a "primitive" update operation that was performed. */
struct update_primitive {
enum {
/* Unlinked a dentry from its parent directory. */
UNLINK_DENTRY,
/* Linked a dentry into its parent directory. */
LINK_DENTRY,
/* Changed the file name of a dentry. */
CHANGE_FILE_NAME,
/* Changed the short name of a dentry. */
CHANGE_SHORT_NAME,
} type;
union {
/* For UNLINK_DENTRY and LINK_DENTRY operations */
struct {
/* Dentry that was linked or unlinked. */
struct wim_dentry *subject;
/* For link operations, the directory into which
* @subject was linked, or NULL if @subject was set as
* the root of the image.
*
* For unlink operations, the directory from which
* @subject was unlinked, or NULL if @subject was unset
* as the root of the image. */
struct wim_dentry *parent;
} link;
/* For CHANGE_FILE_NAME and CHANGE_SHORT_NAME operations */
struct {
/* Dentry that had its name changed. */
struct wim_dentry *subject;
/* The old name. */
utf16lechar *old_name;
} name;
};
};
/* Chronological list of primitive operations that were executed for a single
* logical update command, such as 'add', 'delete', or 'rename'. */
struct update_primitive_list {
struct update_primitive *entries;
struct update_primitive inline_entries[4];
size_t num_entries;
size_t num_alloc_entries;
};
/* Journal for managing the executing of zero or more logical update commands,
* such as 'add', 'delete', or 'rename'. This allows either committing or
* rolling back the commands. */
struct update_command_journal {
/* Number of update commands this journal contains. */
size_t num_cmds;
/* Index of currently executing update command. */
size_t cur_cmd;
/* Location of the WIM image's root pointer. */
struct wim_dentry **root_p;
/* Pointer to the blob table of the WIM (may needed for rollback) */
struct blob_table *blob_table;
/* List of dentries that are currently unlinked from the WIM image.
* These must be freed when no longer needed for commit or rollback. */
struct list_head orphans;
/* Per-command logs. */
struct update_primitive_list cmd_prims[];
};
static void
init_update_primitive_list(struct update_primitive_list *l)
{
l->entries = l->inline_entries;
l->num_entries = 0;
l->num_alloc_entries = ARRAY_LEN(l->inline_entries);
}
/* Allocates a new journal for managing the execution of up to @num_cmds update
* commands. */
static struct update_command_journal *
new_update_command_journal(size_t num_cmds, struct wim_dentry **root_p,
struct blob_table *blob_table)
{
struct update_command_journal *j;
j = MALLOC(sizeof(*j) + num_cmds * sizeof(j->cmd_prims[0]));
if (j) {
j->num_cmds = num_cmds;
j->cur_cmd = 0;
j->root_p = root_p;
j->blob_table = blob_table;
INIT_LIST_HEAD(&j->orphans);
for (size_t i = 0; i < num_cmds; i++)
init_update_primitive_list(&j->cmd_prims[i]);
}
return j;
}
/* Don't call this directly; use commit_update() or rollback_update() instead.
*/
static void
free_update_command_journal(struct update_command_journal *j)
{
struct wim_dentry *orphan;
/* Free orphaned dentry trees */
while (!list_empty(&j->orphans)) {
orphan = list_first_entry(&j->orphans,
struct wim_dentry, d_tmp_list);
list_del(&orphan->d_tmp_list);
free_dentry_tree(orphan, j->blob_table);
}
for (size_t i = 0; i < j->num_cmds; i++)
if (j->cmd_prims[i].entries != j->cmd_prims[i].inline_entries)
FREE(j->cmd_prims[i].entries);
FREE(j);
}
/* Add the entry @prim to the update command journal @j. */
static int
record_update_primitive(struct update_command_journal *j,
struct update_primitive prim)
{
struct update_primitive_list *l;
l = &j->cmd_prims[j->cur_cmd];
if (l->num_entries == l->num_alloc_entries) {
struct update_primitive *new_entries;
size_t new_num_alloc_entries;
size_t new_size;
new_num_alloc_entries = l->num_alloc_entries * 2;
new_size = new_num_alloc_entries * sizeof(new_entries[0]);
if (l->entries == l->inline_entries) {
new_entries = MALLOC(new_size);
if (!new_entries)
return WIMLIB_ERR_NOMEM;
memcpy(new_entries, l->inline_entries,
sizeof(l->inline_entries));
} else {
new_entries = REALLOC(l->entries, new_size);
if (!new_entries)
return WIMLIB_ERR_NOMEM;
}
l->entries = new_entries;
l->num_alloc_entries = new_num_alloc_entries;
}
l->entries[l->num_entries++] = prim;
return 0;
}
static void
do_unlink(struct wim_dentry *subject, struct wim_dentry *parent,
struct wim_dentry **root_p)
{
if (parent) {
/* Unlink @subject from its @parent. */
wimlib_assert(subject->d_parent == parent);
unlink_dentry(subject);
} else {
/* Unset @subject as the root of the image. */
*root_p = NULL;
}
subject->d_parent = subject;
}
static void
do_link(struct wim_dentry *subject, struct wim_dentry *parent,
struct wim_dentry **root_p)
{
if (parent) {
/* Link @subject to its @parent */
struct wim_dentry *existing;
existing = dentry_add_child(parent, subject);
wimlib_assert(!existing);
} else {
/* Set @subject as root of the image */
*root_p = subject;
}
}
/* Undo a link operation. */
static void
rollback_link(struct wim_dentry *subject, struct wim_dentry *parent,
struct wim_dentry **root_p, struct list_head *orphans)
{
/* Unlink is the opposite of link */
do_unlink(subject, parent, root_p);
/* @subject is now unlinked. Add it to orphans. */
list_add(&subject->d_tmp_list, orphans);
subject->d_is_orphan = 1;
}
/* Undo an unlink operation. */
static void
rollback_unlink(struct wim_dentry *subject, struct wim_dentry *parent,
struct wim_dentry **root_p)
{
/* Link is the opposite of unlink */
do_link(subject, parent, root_p);
/* @subject is no longer unlinked. Delete it from orphans. */
list_del(&subject->d_tmp_list);
subject->d_is_orphan = 0;
}
/* Rollback a name change operation. */
static void
rollback_name_change(utf16lechar *old_name,
utf16lechar **name_ptr, u16 *name_nbytes_ptr)
{
/* Free the new name, then replace it with the old name. */
FREE(*name_ptr);
if (old_name) {
*name_ptr = old_name;
*name_nbytes_ptr = utf16le_len_bytes(old_name);
} else {
*name_ptr = NULL;
*name_nbytes_ptr = 0;
}
}
/* Rollback a primitive update operation. */
static void
rollback_update_primitive(const struct update_primitive *prim,
struct wim_dentry **root_p,
struct list_head *orphans)
{
switch (prim->type) {
case LINK_DENTRY:
rollback_link(prim->link.subject, prim->link.parent, root_p,
orphans);
break;
case UNLINK_DENTRY:
rollback_unlink(prim->link.subject, prim->link.parent, root_p);
break;
case CHANGE_FILE_NAME:
rollback_name_change(prim->name.old_name,
&prim->name.subject->d_name,
&prim->name.subject->d_name_nbytes);
break;
case CHANGE_SHORT_NAME:
rollback_name_change(prim->name.old_name,
&prim->name.subject->d_short_name,
&prim->name.subject->d_short_name_nbytes);
break;
}
}
/* Rollback a logical update command */
static void
rollback_update_command(const struct update_primitive_list *l,
struct wim_dentry **root_p,
struct list_head *orphans)
{
size_t i = l->num_entries;
/* Rollback each primitive operation, in reverse order. */
while (i--)
rollback_update_primitive(&l->entries[i], root_p, orphans);
}
/****************************************************************************/
/* Link @subject into the directory @parent; or, if @parent is NULL, set
* @subject as the root of the WIM image.
*
* This is the journaled version, so it can be rolled back. */
static int
journaled_link(struct update_command_journal *j,
struct wim_dentry *subject, struct wim_dentry *parent)
{
struct update_primitive prim;
int ret;
prim.type = LINK_DENTRY;
prim.link.subject = subject;
prim.link.parent = parent;
ret = record_update_primitive(j, prim);
if (ret)
return ret;
do_link(subject, parent, j->root_p);
if (subject->d_is_orphan) {
list_del(&subject->d_tmp_list);
subject->d_is_orphan = 0;
}
return 0;
}
/* Unlink @subject from the WIM image.
*
* This is the journaled version, so it can be rolled back. */
static int
journaled_unlink(struct update_command_journal *j, struct wim_dentry *subject)
{
struct wim_dentry *parent;
struct update_primitive prim;
int ret;
if (dentry_is_root(subject))
parent = NULL;
else
parent = subject->d_parent;
prim.type = UNLINK_DENTRY;
prim.link.subject = subject;
prim.link.parent = parent;
ret = record_update_primitive(j, prim);
if (ret)
return ret;
do_unlink(subject, parent, j->root_p);
list_add(&subject->d_tmp_list, &j->orphans);
subject->d_is_orphan = 1;
return 0;
}
/* Change the name of @dentry to @new_name_tstr.
*
* This is the journaled version, so it can be rolled back. */
static int
journaled_change_name(struct update_command_journal *j,
struct wim_dentry *dentry, const tchar *new_name_tstr)
{
int ret;
utf16lechar *new_name;
size_t new_name_nbytes;
struct update_primitive prim;
/* Set the long name. */
ret = tstr_to_utf16le(new_name_tstr,
tstrlen(new_name_tstr) * sizeof(tchar),
&new_name, &new_name_nbytes);
if (ret)
return ret;
prim.type = CHANGE_FILE_NAME;
prim.name.subject = dentry;
prim.name.old_name = dentry->d_name;
ret = record_update_primitive(j, prim);
if (ret) {
FREE(new_name);
return ret;
}
dentry->d_name = new_name;
dentry->d_name_nbytes = new_name_nbytes;
/* Clear the short name. */
prim.type = CHANGE_SHORT_NAME;
prim.name.subject = dentry;
prim.name.old_name = dentry->d_short_name;
ret = record_update_primitive(j, prim);
if (ret)
return ret;
dentry->d_short_name = NULL;
dentry->d_short_name_nbytes = 0;
return 0;
}
static void
next_command(struct update_command_journal *j)
{
j->cur_cmd++;
}
static void
commit_update(struct update_command_journal *j)
{
for (size_t i = 0; i < j->num_cmds; i++)
{
for (size_t k = 0; k < j->cmd_prims[i].num_entries; k++)
{
if (j->cmd_prims[i].entries[k].type == CHANGE_FILE_NAME ||
j->cmd_prims[i].entries[k].type == CHANGE_SHORT_NAME)
{
FREE(j->cmd_prims[i].entries[k].name.old_name);
}
}
}
free_update_command_journal(j);
}
static void
rollback_update(struct update_command_journal *j)
{
/* Rollback each logical update command, in reverse order. */
size_t i = j->cur_cmd;
if (i < j->num_cmds)
i++;
while (i--)
rollback_update_command(&j->cmd_prims[i], j->root_p, &j->orphans);
free_update_command_journal(j);
}
static int
handle_conflict(struct wim_dentry *branch, struct wim_dentry *existing,
struct update_command_journal *j,
int add_flags,
wimlib_progress_func_t progfunc, void *progctx)
{
bool branch_is_dir = dentry_is_directory(branch);
bool existing_is_dir = dentry_is_directory(existing);
if (branch_is_dir != existing_is_dir) {
if (existing_is_dir) {
ERROR("\"%"TS"\" is a directory!\n"
" Specify the path at which "
"to place the file inside this directory.",
dentry_full_path(existing));
return WIMLIB_ERR_IS_DIRECTORY;
} else {
ERROR("Can't place directory at \"%"TS"\" because "
"a nondirectory file already exists there!",
dentry_full_path(existing));
return WIMLIB_ERR_NOTDIR;
}
}
if (branch_is_dir) {
/* Directory overlay */
while (dentry_has_children(branch)) {
struct wim_dentry *new_child;
struct wim_dentry *existing_child;
int ret;
new_child = dentry_any_child(branch);
existing_child =
get_dentry_child_with_utf16le_name(existing,
new_child->d_name,
new_child->d_name_nbytes,
WIMLIB_CASE_PLATFORM_DEFAULT);
unlink_dentry(new_child);
if (existing_child) {
ret = handle_conflict(new_child, existing_child,
j, add_flags,
progfunc, progctx);
} else {
ret = journaled_link(j, new_child, existing);
}
if (ret) {
dentry_add_child(branch, new_child);
return ret;
}
}
free_dentry_tree(branch, j->blob_table);
return 0;
} else if (add_flags & WIMLIB_ADD_FLAG_NO_REPLACE) {
/* Can't replace nondirectory file */
ERROR("Refusing to overwrite nondirectory file \"%"TS"\"",
dentry_full_path(existing));
return WIMLIB_ERR_INVALID_OVERLAY;
} else {
/* Replace nondirectory file */
struct wim_dentry *parent;
int ret;
parent = existing->d_parent;
ret = calculate_dentry_full_path(existing);
if (ret)
return ret;
if (add_flags & WIMLIB_ADD_FLAG_VERBOSE) {
union wimlib_progress_info info;
info.replace.path_in_wim = existing->d_full_path;
ret = call_progress(progfunc,
WIMLIB_PROGRESS_MSG_REPLACE_FILE_IN_WIM,
&info, progctx);
if (ret)
return ret;
}
ret = journaled_unlink(j, existing);
if (ret)
return ret;
return journaled_link(j, branch, parent);
}
}
static int
do_attach_branch(struct wim_dentry *branch, const utf16lechar *target,
struct update_command_journal *j,
int add_flags, wimlib_progress_func_t progfunc, void *progctx)
{
struct wim_dentry *parent;
struct wim_dentry *existing;
const utf16lechar empty_name[1] = {0};
const utf16lechar *cur_component_name;
size_t cur_component_nbytes;
const utf16lechar *next_component_name;
int ret;
/* Attempt to create root directory before proceeding to the "real"
* first component */
parent = NULL;
existing = *j->root_p;
cur_component_name = empty_name;
cur_component_nbytes = 0;
/* Skip leading slashes */
next_component_name = target;
while (*next_component_name == cpu_to_le16(WIM_PATH_SEPARATOR))
next_component_name++;
while (*next_component_name) { /* While not the last component ... */
const utf16lechar *end;
if (existing) {
/* Descend into existing directory */
if (!dentry_is_directory(existing)) {
ERROR("\"%"TS"\" in the WIM image "
"is not a directory!",
dentry_full_path(existing));
return WIMLIB_ERR_NOTDIR;
}
} else {
/* A parent directory of the target didn't exist. Make
* the way by creating a filler directory. */
struct wim_dentry *filler;
ret = new_filler_directory(&filler);
if (ret)
return ret;
ret = dentry_set_name_utf16le(filler,
cur_component_name,
cur_component_nbytes);
if (ret) {
free_dentry(filler);
return ret;
}
ret = journaled_link(j, filler, parent);
if (ret) {
free_dentry(filler);
return ret;
}
existing = filler;
}
/* Advance to next component */
cur_component_name = next_component_name;
end = cur_component_name + 1;
while (*end && *end != cpu_to_le16(WIM_PATH_SEPARATOR))
end++;
next_component_name = end;
if (*end) {
/* There will still be more components after this. */
do {
} while (*++next_component_name == cpu_to_le16(WIM_PATH_SEPARATOR));
wimlib_assert(*next_component_name); /* No trailing slashes */
} else {
/* This will be the last component */
next_component_name = end;
}
parent = existing;
cur_component_nbytes = (end - cur_component_name) * sizeof(utf16lechar);
existing = get_dentry_child_with_utf16le_name(
parent,
cur_component_name,
cur_component_nbytes,
WIMLIB_CASE_PLATFORM_DEFAULT);
}
/* Last component */
if (existing) {
return handle_conflict(branch, existing, j, add_flags,
progfunc, progctx);
} else {
return journaled_link(j, branch, parent);
}
}
/*
* Place the directory entry tree @branch at the path @target_tstr in the WIM
* image.
*
* @target_tstr cannot contain trailing slashes, and all path separators must be
* WIM_PATH_SEPARATOR.
*
* On success, @branch is committed to the journal @j.
* Otherwise @branch is freed.
*
* The relevant @add_flags are WIMLIB_ADD_FLAG_NO_REPLACE and
* WIMLIB_ADD_FLAG_VERBOSE.
*/
static int
attach_branch(struct wim_dentry *branch, const tchar *target_tstr,
struct update_command_journal *j, int add_flags,
wimlib_progress_func_t progfunc, void *progctx)
{
int ret;
const utf16lechar *target;
ret = 0;
if (unlikely(!branch))
goto out;
ret = tstr_get_utf16le(target_tstr, &target);
if (ret)
goto out_free_branch;
STATIC_ASSERT(WIM_PATH_SEPARATOR == OS_PREFERRED_PATH_SEPARATOR);
ret = dentry_set_name(branch, path_basename(target_tstr));
if (ret)
goto out_free_target;
ret = do_attach_branch(branch, target, j, add_flags, progfunc, progctx);
if (ret)
goto out_free_target;
/* branch was successfully committed to the journal */
branch = NULL;
out_free_target:
tstr_put_utf16le(target);
out_free_branch:
free_dentry_tree(branch, j->blob_table);
out:
return ret;
}
static const char wincfg[] =
"[ExclusionList]\n"
"/$ntfs.log\n"
"/hiberfil.sys\n"
"/pagefile.sys\n"
"/swapfile.sys\n"
"/System Volume Information\n"
"/RECYCLER\n"
"/$RECYCLE.BIN\n"
"/$Recycle.Bin\n"
"/Windows/CSC\n";
static const tchar *wimboot_cfgfile =
WIMLIB_WIM_PATH_SEPARATOR_STRING T("Windows")
WIMLIB_WIM_PATH_SEPARATOR_STRING T("System32")
WIMLIB_WIM_PATH_SEPARATOR_STRING T("WimBootCompress.ini");
static int
get_capture_config(const tchar *config_file, struct capture_config *config,
int add_flags, const tchar *fs_source_path)
{
int ret;
tchar *tmp_config_file = NULL;
memset(config, 0, sizeof(*config));
/* For WIMBoot capture, check for default capture configuration file
* unless one was explicitly specified. */
if (!config_file && (add_flags & WIMLIB_ADD_FLAG_WIMBOOT)) {
/* XXX: Handle loading file correctly when in NTFS volume. */
size_t len = tstrlen(fs_source_path) +
tstrlen(wimboot_cfgfile);
struct stat st;
tmp_config_file = MALLOC((len + 1) * sizeof(tchar));
if (!tmp_config_file)
return WIMLIB_ERR_NOMEM;
tsprintf(tmp_config_file, T("%"TS"%"TS),
fs_source_path, wimboot_cfgfile);
if (!tstat(tmp_config_file, &st)) {
config_file = tmp_config_file;
add_flags &= ~WIMLIB_ADD_FLAG_WINCONFIG;
} else {
WARNING("\"%"TS"\" does not exist.\n"
" Using default capture configuration!",
tmp_config_file);
}
}
if (add_flags & WIMLIB_ADD_FLAG_WINCONFIG) {
/* Use Windows default. */
if (config_file)
return WIMLIB_ERR_INVALID_PARAM;
ret = read_capture_config(T("wincfg"), wincfg,
sizeof(wincfg) - 1, config);
} else if (config_file) {
/* Use the specified configuration file. */
ret = read_capture_config(config_file, NULL, 0, config);
} else {
/* ... Or don't use any configuration file at all. No files
* will be excluded from capture, all files will be compressed,
* etc. */
ret = 0;
}
FREE(tmp_config_file);
return ret;
}
static int
execute_add_command(struct update_command_journal *j,
WIMStruct *wim,
const struct wimlib_update_command *add_cmd,
struct wim_inode_table *inode_table,
struct wim_sd_set *sd_set,
struct list_head *unhashed_blobs)
{
int ret;
int add_flags;
tchar *fs_source_path;
tchar *wim_target_path;
const tchar *config_file;
struct scan_params params;
struct capture_config config;
scan_tree_t scan_tree = platform_default_scan_tree;
struct wim_dentry *branch;
add_flags = add_cmd->add.add_flags;
fs_source_path = add_cmd->add.fs_source_path;
wim_target_path = add_cmd->add.wim_target_path;
config_file = add_cmd->add.config_file;
memset(¶ms, 0, sizeof(params));
#ifdef WITH_NTFS_3G
if (add_flags & WIMLIB_ADD_FLAG_NTFS)
scan_tree = ntfs_3g_build_dentry_tree;
#endif
#ifdef ENABLE_TEST_SUPPORT
if (add_flags & WIMLIB_ADD_FLAG_GENERATE_TEST_DATA)
scan_tree = generate_dentry_tree;
#endif
ret = get_capture_config(config_file, &config,
add_flags, fs_source_path);
if (ret)
goto out;
params.blob_table = wim->blob_table;
params.unhashed_blobs = unhashed_blobs;
params.inode_table = inode_table;
params.sd_set = sd_set;
params.config = &config;
params.add_flags = add_flags;
params.progfunc = wim->progfunc;
params.progctx = wim->progctx;
params.progress.scan.source = fs_source_path;
params.progress.scan.wim_target_path = wim_target_path;
ret = call_progress(params.progfunc, WIMLIB_PROGRESS_MSG_SCAN_BEGIN,
¶ms.progress, params.progctx);
if (ret)
goto out_destroy_config;
if (WIMLIB_IS_WIM_ROOT_PATH(wim_target_path))
params.add_flags |= WIMLIB_ADD_FLAG_ROOT;
ret = (*scan_tree)(&branch, fs_source_path, ¶ms);
if (ret)
goto out_destroy_config;
ret = call_progress(params.progfunc, WIMLIB_PROGRESS_MSG_SCAN_END,
¶ms.progress, params.progctx);
if (ret) {
free_dentry_tree(branch, wim->blob_table);
goto out_destroy_config;
}
if (WIMLIB_IS_WIM_ROOT_PATH(wim_target_path) &&
branch && !dentry_is_directory(branch))
{
ERROR("\"%"TS"\" is not a directory!", fs_source_path);
ret = WIMLIB_ERR_NOTDIR;
free_dentry_tree(branch, wim->blob_table);
goto out_destroy_config;
}
ret = attach_branch(branch, wim_target_path, j,
add_flags, params.progfunc, params.progctx);
if (ret)
goto out_destroy_config;
if (config_file && (add_flags & WIMLIB_ADD_FLAG_WIMBOOT) &&
WIMLIB_IS_WIM_ROOT_PATH(wim_target_path))
{
params.add_flags = 0;
params.progfunc = NULL;
params.config = NULL;
/* If a capture configuration file was explicitly specified when
* capturing an image in WIMBoot mode, save it as
* /Windows/System32/WimBootCompress.ini in the WIM image. */
ret = platform_default_scan_tree(&branch, config_file, ¶ms);
if (ret)
goto out_destroy_config;
ret = attach_branch(branch, wimboot_cfgfile, j, 0, NULL, NULL);
if (ret)
goto out_destroy_config;
}
if (WIMLIB_IS_WIM_ROOT_PATH(wim_target_path)) {
ret = set_windows_specific_info(wim);
if (ret)
goto out_destroy_config;
}
ret = 0;
out_destroy_config:
destroy_capture_config(&config);
out:
FREE(params.cur_path);
return ret;
}
static int
execute_delete_command(struct update_command_journal *j,
WIMStruct *wim,
const struct wimlib_update_command *delete_cmd)
{
int flags;
const tchar *wim_path;
struct wim_dentry *tree;
flags = delete_cmd->delete_.delete_flags;
wim_path = delete_cmd->delete_.wim_path;
tree = get_dentry(wim, wim_path, WIMLIB_CASE_PLATFORM_DEFAULT);
if (!tree) {
/* Path to delete does not exist in the WIM. */
if (flags & WIMLIB_DELETE_FLAG_FORCE) {
return 0;
} else {
ERROR("Path \"%"TS"\" does not exist in WIM image %d",
wim_path, wim->current_image);
return WIMLIB_ERR_PATH_DOES_NOT_EXIST;
}
}
if (dentry_is_directory(tree) && !(flags & WIMLIB_DELETE_FLAG_RECURSIVE)) {
ERROR("Path \"%"TS"\" in WIM image %d is a directory "
"but a recursive delete was not requested",
wim_path, wim->current_image);
return WIMLIB_ERR_IS_DIRECTORY;
}
return journaled_unlink(j, tree);
}
static int
free_dentry_full_path(struct wim_dentry *dentry, void *_ignore)
{
FREE(dentry->d_full_path);
dentry->d_full_path = NULL;
return 0;
}
/* Is @d1 a (possibly nonproper) ancestor of @d2? */
static bool
is_ancestor(const struct wim_dentry *d1, const struct wim_dentry *d2)
{
for (;;) {
if (d2 == d1)
return true;
if (dentry_is_root(d2))
return false;
d2 = d2->d_parent;
}
}
/* Rename a file or directory in the WIM.
*
* This returns a -errno value.
*
* The journal @j is optional.
*/
int
rename_wim_path(WIMStruct *wim, const tchar *from, const tchar *to,
CASE_SENSITIVITY_TYPE case_type, bool noreplace,
struct update_command_journal *j)
{
struct wim_dentry *src;
struct wim_dentry *dst;
struct wim_dentry *parent_of_dst;
int ret;
/* This rename() implementation currently only supports actual files
* (not alternate data streams) */
src = get_dentry(wim, from, case_type);
if (!src)
return -errno;
dst = get_dentry(wim, to, case_type);
if (dst) {
/* Destination file exists */
if (noreplace)
return -EEXIST;
if (src == dst) /* Same file */
return 0;
if (!dentry_is_directory(src)) {
/* Cannot rename non-directory to directory. */
if (dentry_is_directory(dst))
return -EISDIR;
} else {
/* Cannot rename directory to a non-directory or a non-empty
* directory */
if (!dentry_is_directory(dst))
return -ENOTDIR;
if (dentry_has_children(dst))
return -ENOTEMPTY;
}
parent_of_dst = dst->d_parent;
} else {