X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fwin32_apply.c;h=3f4a4562567ba223183636f2836fde07fb0bf660;hp=c182862ea42af8e4483a687df00d665222184216;hb=036c7da59a54e9a24b1afb917b4f9f10eee176ee;hpb=b3562d219976321899ea77bf36c25adf756c7447 diff --git a/src/win32_apply.c b/src/win32_apply.c index c182862e..3f4a4562 100644 --- a/src/win32_apply.c +++ b/src/win32_apply.c @@ -3,7 +3,7 @@ */ /* - * Copyright (C) 2013 Eric Biggers + * Copyright (C) 2013, 2014 Eric Biggers * * This file is part of wimlib, a library for working with WIM files. * @@ -30,55 +30,44 @@ #include "wimlib/win32_common.h" #include "wimlib/apply.h" -#include "wimlib/capture.h" +#include "wimlib/capture.h" /* for mangle_pat() and match_pattern_list() */ #include "wimlib/dentry.h" #include "wimlib/error.h" #include "wimlib/lookup_table.h" -#include "wimlib/paths.h" +#include "wimlib/resource.h" #include "wimlib/textfile.h" #include "wimlib/xml.h" #include "wimlib/wim.h" #include "wimlib/wimboot.h" -static void -ctx_save_data_source_id(struct apply_ctx *ctx, u64 data_source_id) -{ - ctx->private[0] = data_source_id & 0xFFFFFFFF; - ctx->private[1] = data_source_id >> 32; -} - -static u64 -ctx_get_data_source_id(const struct apply_ctx *ctx) -{ - return (u32)ctx->private[0] | ((u64)(u32)ctx->private[1] << 32); -} - -static void -set_prepopulate_pats(struct apply_ctx *ctx, struct string_set *s) -{ - ctx->private[2] = (intptr_t)s; -} +struct win32_apply_private_data { + u64 data_source_id; + struct string_set *prepopulate_pats; + void *mem_prepopulate_pats; + u8 wim_lookup_table_hash[SHA1_HASH_SIZE]; + bool wof_running; +}; -static struct string_set * -get_prepopulate_pats(struct apply_ctx *ctx) +static struct win32_apply_private_data * +get_private_data(struct apply_ctx *ctx) { - return (struct string_set *)(ctx->private[2]); + BUILD_BUG_ON(sizeof(ctx->private) < sizeof(struct win32_apply_private_data)); + return (struct win32_apply_private_data *)(ctx->private); } static void -free_prepopulate_pats(struct apply_ctx *ctx) +free_prepopulate_pats(struct win32_apply_private_data *dat) { - struct string_set *s; - - s = get_prepopulate_pats(ctx); - if (s) { - FREE(s->strings); - FREE(s); + if (dat->prepopulate_pats) { + FREE(dat->prepopulate_pats->strings); + FREE(dat->prepopulate_pats); + dat->prepopulate_pats = NULL; } - set_prepopulate_pats(ctx, NULL); - FREE((void *)ctx->private[3]); - ctx->private[3] = (intptr_t)NULL; + if (dat->mem_prepopulate_pats) { + FREE(dat->mem_prepopulate_pats); + dat->mem_prepopulate_pats = NULL; + } } static int @@ -94,6 +83,7 @@ load_prepopulate_pats(struct apply_ctx *ctx) void *buf; void *mem; struct text_file_section sec; + struct win32_apply_private_data *dat = get_private_data(ctx); dentry = get_dentry(ctx->wim, path, WIMLIB_CASE_INSENSITIVE); if (!dentry || @@ -123,31 +113,157 @@ load_prepopulate_pats(struct apply_ctx *ctx) LOAD_TEXT_FILE_REMOVE_QUOTES | LOAD_TEXT_FILE_NO_WARNINGS, mangle_pat); + BUILD_BUG_ON(OS_PREFERRED_PATH_SEPARATOR != WIM_PATH_SEPARATOR); FREE(buf); if (ret) { FREE(s); return ret; } - set_prepopulate_pats(ctx, s); - ctx->private[3] = (intptr_t)mem; + dat->prepopulate_pats = s; + dat->mem_prepopulate_pats = mem; return 0; } static bool -in_prepopulate_list(struct wim_dentry *dentry, - struct apply_ctx *ctx) +in_prepopulate_list(struct wim_dentry *dentry, struct apply_ctx *ctx) { struct string_set *pats; const tchar *path; - pats = get_prepopulate_pats(ctx); - if (!pats) + pats = get_private_data(ctx)->prepopulate_pats; + if (!pats || !pats->num_strings) return false; + path = dentry_full_path(dentry); if (!path) return false; - return match_pattern(path, path_basename(path), pats); + return match_pattern_list(path, tstrlen(path), pats); +} + +static int +hash_lookup_table(WIMStruct *wim, u8 hash[SHA1_HASH_SIZE]) +{ + return wim_reshdr_to_hash(&wim->hdr.lookup_table_reshdr, wim, hash); +} + +/* Given a Windows-style path, return the number of characters of the prefix + * that specify the path to the root directory of a drive, or return 0 if the + * drive is relative (or at least on the current drive, in the case of + * absolute-but-not-really-absolute paths like \Windows\System32) */ +static size_t +win32_path_drive_spec_len(const wchar_t *path) +{ + size_t n = 0; + + if (!wcsncmp(path, L"\\\\?\\", 4)) { + /* \\?\-prefixed path. Check for following drive letter and + * path separator. */ + if (path[4] != L'\0' && path[5] == L':' && + is_any_path_separator(path[6])) + n = 7; + } else { + /* Not a \\?\-prefixed path. Check for an initial drive letter + * and path separator. */ + if (path[0] != L'\0' && path[1] == L':' && + is_any_path_separator(path[2])) + n = 3; + } + /* Include any additional path separators.*/ + if (n > 0) + while (is_any_path_separator(path[n])) + n++; + return n; +} + +static bool +win32_path_is_root_of_drive(const wchar_t *path) +{ + size_t drive_spec_len; + wchar_t full_path[32768]; + DWORD ret; + + ret = GetFullPathName(path, ARRAY_LEN(full_path), full_path, NULL); + if (ret > 0 && ret < ARRAY_LEN(full_path)) + path = full_path; + + /* Explicit drive letter and path separator? */ + drive_spec_len = win32_path_drive_spec_len(path); + if (drive_spec_len > 0 && path[drive_spec_len] == L'\0') + return true; + + /* All path separators? */ + for (const wchar_t *p = path; *p != L'\0'; p++) + if (!is_any_path_separator(*p)) + return false; + return true; +} + +/* Given a path, which may not yet exist, get a set of flags that describe the + * features of the volume the path is on. */ +static int +win32_get_vol_flags(const wchar_t *path, unsigned *vol_flags_ret, + bool *supports_SetFileShortName_ret) +{ + wchar_t *volume; + BOOL bret; + DWORD vol_flags; + size_t drive_spec_len; + wchar_t filesystem_name[MAX_PATH + 1]; + + if (supports_SetFileShortName_ret) + *supports_SetFileShortName_ret = false; + + drive_spec_len = win32_path_drive_spec_len(path); + + if (drive_spec_len == 0) + if (path[0] != L'\0' && path[1] == L':') /* Drive-relative path? */ + drive_spec_len = 2; + + if (drive_spec_len == 0) { + /* Path does not start with a drive letter; use the volume of + * the current working directory. */ + volume = NULL; + } else { + /* Path starts with a drive letter (or \\?\ followed by a drive + * letter); use it. */ + volume = alloca((drive_spec_len + 2) * sizeof(wchar_t)); + wmemcpy(volume, path, drive_spec_len); + /* Add trailing backslash in case this was a drive-relative + * path. */ + volume[drive_spec_len] = L'\\'; + volume[drive_spec_len + 1] = L'\0'; + } + bret = GetVolumeInformation( + volume, /* lpRootPathName */ + NULL, /* lpVolumeNameBuffer */ + 0, /* nVolumeNameSize */ + NULL, /* lpVolumeSerialNumber */ + NULL, /* lpMaximumComponentLength */ + &vol_flags, /* lpFileSystemFlags */ + filesystem_name, /* lpFileSystemNameBuffer */ + ARRAY_LEN(filesystem_name)); /* nFileSystemNameSize */ + if (!bret) { + set_errno_from_GetLastError(); + WARNING_WITH_ERRNO("Failed to get volume information for " + "path \"%ls\"", path); + vol_flags = 0xffffffff; + goto out; + } + + if (wcsstr(filesystem_name, L"NTFS")) { + /* FILE_SUPPORTS_HARD_LINKS is only supported on Windows 7 and later. + * Force it on anyway if filesystem is NTFS. */ + vol_flags |= FILE_SUPPORTS_HARD_LINKS; + + if (supports_SetFileShortName_ret) + *supports_SetFileShortName_ret = true; + } + +out: + DEBUG("using vol_flags = %x", vol_flags); + *vol_flags_ret = vol_flags; + return 0; } static int @@ -156,10 +272,11 @@ win32_start_extract(const wchar_t *path, struct apply_ctx *ctx) int ret; unsigned vol_flags; bool supports_SetFileShortName; + struct win32_apply_private_data *dat = get_private_data(ctx); ret = win32_get_vol_flags(path, &vol_flags, &supports_SetFileShortName); if (ret) - return ret; + goto err; ctx->supported_features.archive_files = 1; ctx->supported_features.hidden_files = 1; @@ -175,8 +292,10 @@ win32_start_extract(const wchar_t *path, struct apply_ctx *ctx) ctx->supported_features.not_context_indexed_files = 1; +#if 0 if (vol_flags & FILE_SUPPORTS_SPARSE_FILES) ctx->supported_features.sparse_files = 1; +#endif if (vol_flags & FILE_NAMED_STREAMS) ctx->supported_features.named_data_streams = 1; @@ -186,7 +305,7 @@ win32_start_extract(const wchar_t *path, struct apply_ctx *ctx) if (vol_flags & FILE_SUPPORTS_REPARSE_POINTS) { ctx->supported_features.reparse_points = 1; - if (win32func_CreateSymbolicLinkW) + if (func_CreateSymbolicLinkW) ctx->supported_features.symlink_reparse_points = 1; } @@ -200,32 +319,38 @@ win32_start_extract(const wchar_t *path, struct apply_ctx *ctx) ret = load_prepopulate_pats(ctx); if (ret == WIMLIB_ERR_NOMEM) - return ret; - - u64 data_source_id; + goto err; if (!wim_info_get_wimboot(ctx->wim->wim_info, ctx->wim->current_image)) WARNING("Image is not marked as WIMBoot compatible!"); + + ret = hash_lookup_table(ctx->wim, dat->wim_lookup_table_hash); + if (ret) + goto err; + ret = wimboot_alloc_data_source_id(ctx->wim->filename, + ctx->wim->hdr.guid, ctx->wim->current_image, - path, &data_source_id); - if (ret) { - free_prepopulate_pats(ctx); - return ret; - } - - ctx_save_data_source_id(ctx, data_source_id); + path, + &dat->data_source_id, + &dat->wof_running); + if (ret) + goto err; } return 0; + +err: + free_prepopulate_pats(dat); + return ret; } static int win32_finish_extract(struct apply_ctx *ctx) { - free_prepopulate_pats(ctx); + free_prepopulate_pats(get_private_data(ctx)); return 0; } @@ -335,12 +460,12 @@ static int win32_create_symlink(const wchar_t *oldpath, const wchar_t *newpath, struct apply_ctx *ctx) { - if (!(*win32func_CreateSymbolicLinkW)(newpath, oldpath, 0)) { + if (!(*func_CreateSymbolicLinkW)(newpath, oldpath, 0)) { if (GetLastError() != ERROR_ALREADY_EXISTS) goto error; if (!win32_delete_file_wrapper(newpath)) goto error; - if (!(*win32func_CreateSymbolicLinkW)(newpath, oldpath, 0)) + if (!(*func_CreateSymbolicLinkW)(newpath, oldpath, 0)) goto error; } return 0; @@ -389,23 +514,48 @@ win32_extract_stream(const wchar_t *path, const wchar_t *stream_name, creationDisposition, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, NULL); - if (h == INVALID_HANDLE_VALUE) - goto error; + if (h == INVALID_HANDLE_VALUE) { + set_errno_from_GetLastError(); + ret = WIMLIB_ERR_OPEN; + goto out; + } - ret = 0; - if (!lte) + if (!lte) { + ret = 0; goto out_close_handle; + } + + if (!SetFilePointerEx(h, + (LARGE_INTEGER) { .QuadPart = lte->size}, + NULL, + FILE_BEGIN)) + goto write_error; + + if (!SetEndOfFile(h)) + goto write_error; + + if (!SetFilePointerEx(h, + (LARGE_INTEGER) { .QuadPart = 0}, + NULL, + FILE_BEGIN)) + goto write_error; + ret = extract_stream(lte, lte->size, win32_extract_wim_chunk, h); -out_close_handle: - if (!CloseHandle(h)) - goto error; - if (ret && !errno) - errno = -1; - return ret; + goto out_close_handle; -error: +write_error: set_errno_from_GetLastError(); - return WIMLIB_ERR_WRITE; + ret = WIMLIB_ERR_WRITE; + +out_close_handle: + if (!CloseHandle(h)) { + if (!ret) { + set_errno_from_GetLastError(); + ret = WIMLIB_ERR_WRITE; + } + } +out: + return ret; } static int @@ -418,11 +568,27 @@ win32_extract_unnamed_stream(file_spec_t file, && lte && lte->resource_location == RESOURCE_IN_WIM && lte->rspec->wim == ctx->wim - && !in_prepopulate_list(dentry, ctx)) + && lte->size == lte->rspec->uncompressed_size) { - return wimboot_set_pointer(file.path, - ctx_get_data_source_id(ctx), - lte->hash); + if (in_prepopulate_list(dentry, ctx)) { + if (ctx->progress_func) { + union wimlib_progress_info info; + + info.wimboot_exclude.path_in_wim = dentry->_full_path; + info.wimboot_exclude.extraction_path = file.path; + + ctx->progress_func(WIMLIB_PROGRESS_MSG_WIMBOOT_EXCLUDE, + &info); + } + } else { + const struct win32_apply_private_data *dat; + + dat = get_private_data(ctx); + return wimboot_set_pointer(file.path, lte, + dat->data_source_id, + dat->wim_lookup_table_hash, + dat->wof_running); + } } return win32_extract_stream(file.path, NULL, 0, lte, ctx); @@ -506,12 +672,27 @@ win32_set_special_file_attributes(const wchar_t *path, u32 attributes) if (h == INVALID_HANDLE_VALUE) goto error; + /* Don't make extracted files sparse. It is pointless without also + * skipping over runs of zeroes when writing the file, and in fact + * increases disk usage --- apparently, allocation sizes in sparse files + * are rounded up to multiples of 131072 bytes rather than 4096 bytes. + * And in some Windows 7 images, *all* files are set as sparse for some + * reason, which causes 1 GB+ of disk space to be wasted on the target + * drive of a full extraction. + * + * WIMGAPI seemingly does not make extracted files sparse either. + * + * XXX: We really ought to do a proper sparse extraction anyway if the + * file meets some heuristic that indicates this would be beneficial. + */ +#if 0 if (attributes & FILE_ATTRIBUTE_SPARSE_FILE) if (!DeviceIoControl(h, FSCTL_SET_SPARSE, NULL, 0, NULL, 0, &bytes_returned, NULL)) goto error_close_handle; +#endif if (attributes & FILE_ATTRIBUTE_COMPRESSED) if (!DeviceIoControl(h, FSCTL_SET_COMPRESSION, @@ -676,23 +857,6 @@ error: return WIMLIB_ERR_WRITE; /* XXX: need better error code */ } -static DWORD -do_win32_set_security_descriptor(HANDLE h, const wchar_t *path, - SECURITY_INFORMATION info, - PSECURITY_DESCRIPTOR desc) -{ -#ifdef WITH_NTDLL - if (func_NtSetSecurityObject) { - return (*func_RtlNtStatusToDosError)( - (*func_NtSetSecurityObject)(h, info, desc)); - } -#endif - if (SetFileSecurity(path, info, desc)) - return ERROR_SUCCESS; - else - return GetLastError(); -} - /* * Set an arbitrary security descriptor on an arbitrary file (or directory), * working around bugs and design flaws in the Windows operating system. @@ -707,7 +871,9 @@ win32_set_security_descriptor(const wchar_t *path, const u8 *desc, size_t desc_size, struct apply_ctx *ctx) { SECURITY_INFORMATION info; + DWORD dwDesiredAccess; HANDLE h; + DWORD status; int ret; /* We really just want to set entire the security descriptor as-is, but @@ -719,8 +885,6 @@ win32_set_security_descriptor(const wchar_t *path, const u8 *desc, info = OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION | SACL_SECURITY_INFORMATION; - h = INVALID_HANDLE_VALUE; - /* Prefer NtSetSecurityObject() to SetFileSecurity(). SetFileSecurity() * itself necessarily uses NtSetSecurityObject() as the latter is the * underlying system call for setting security information, but @@ -730,83 +894,69 @@ win32_set_security_descriptor(const wchar_t *path, const u8 *desc, * Administrator can have access denied. (Of course, this not mentioned * in the MS "documentation".) */ -#ifdef WITH_NTDLL - if (func_NtSetSecurityObject) { - DWORD dwDesiredAccess; - - /* Open a handle for NtSetSecurityObject() with as many relevant - * access rights as possible. - * - * We don't know which rights will be actually granted. It - * could be less than what is needed to actually assign the full - * security descriptor, especially if the process is running as - * a non-Administrator. However, by default we just do the best - * we can, unless WIMLIB_EXTRACT_FLAG_STRICT_ACLS has been - * enabled. The MAXIMUM_ALLOWED access right is seemingly - * designed for this use case; however, it does not work - * properly in all cases: it can cause CreateFile() to fail with - * ERROR_ACCESS_DENIED, even though by definition - * MAXIMUM_ALLOWED access only requests access rights that are - * *not* denied. (Needless to say, MS does not document this - * bug.) */ - - dwDesiredAccess = WRITE_DAC | - WRITE_OWNER | - ACCESS_SYSTEM_SECURITY; - for (;;) { - DWORD err; - - h = win32_open_existing_file(path, dwDesiredAccess); - if (h != INVALID_HANDLE_VALUE) - break; - err = GetLastError(); - if (err == ERROR_ACCESS_DENIED || - err == ERROR_PRIVILEGE_NOT_HELD) - { - /* Don't increment partial_security_descriptors - * here or check WIMLIB_EXTRACT_FLAG_STRICT_ACLS - * here. It will be done later if needed; here - * we are just trying to get as many relevant - * access rights as possible. */ - if (dwDesiredAccess & ACCESS_SYSTEM_SECURITY) { - dwDesiredAccess &= ~ACCESS_SYSTEM_SECURITY; - continue; - } - if (dwDesiredAccess & WRITE_DAC) { - dwDesiredAccess &= ~WRITE_DAC; - continue; - } - if (dwDesiredAccess & WRITE_OWNER) { - dwDesiredAccess &= ~WRITE_OWNER; - continue; - } + /* Open a handle for NtSetSecurityObject() with as many relevant + * access rights as possible. + * + * We don't know which rights will be actually granted. It + * could be less than what is needed to actually assign the full + * security descriptor, especially if the process is running as + * a non-Administrator. However, by default we just do the best + * we can, unless WIMLIB_EXTRACT_FLAG_STRICT_ACLS has been + * enabled. The MAXIMUM_ALLOWED access right is seemingly + * designed for this use case; however, it does not work + * properly in all cases: it can cause CreateFile() to fail with + * ERROR_ACCESS_DENIED, even though by definition + * MAXIMUM_ALLOWED access only requests access rights that are + * *not* denied. (Needless to say, MS does not document this + * bug.) */ + + dwDesiredAccess = WRITE_DAC | WRITE_OWNER | ACCESS_SYSTEM_SECURITY; + while ((h = win32_open_existing_file(path, + dwDesiredAccess)) == INVALID_HANDLE_VALUE) + { + DWORD err; + + err = GetLastError(); + if (err == ERROR_ACCESS_DENIED || + err == ERROR_PRIVILEGE_NOT_HELD) + { + /* Don't increment partial_security_descriptors + * here or check WIMLIB_EXTRACT_FLAG_STRICT_ACLS + * here. It will be done later if needed; here + * we are just trying to get as many relevant + * access rights as possible. */ + if (dwDesiredAccess & ACCESS_SYSTEM_SECURITY) { + dwDesiredAccess &= ~ACCESS_SYSTEM_SECURITY; + continue; + } + if (dwDesiredAccess & WRITE_DAC) { + dwDesiredAccess &= ~WRITE_DAC; + continue; + } + if (dwDesiredAccess & WRITE_OWNER) { + dwDesiredAccess &= ~WRITE_OWNER; + continue; } - /* Other error, or couldn't open the file even with no - * access rights specified. Something else must be - * wrong. */ - set_errno_from_win32_error(err); - return WIMLIB_ERR_SET_SECURITY; } + /* Other error, or couldn't open the file even with no + * access rights specified. Something else must be + * wrong. */ + set_errno_from_win32_error(err); + return WIMLIB_ERR_SET_SECURITY; } -#endif /* Try setting the security descriptor. */ - for (;;) { - DWORD err; - - err = do_win32_set_security_descriptor(h, path, info, - (PSECURITY_DESCRIPTOR)desc); - if (err == ERROR_SUCCESS) { - ret = 0; - break; - } - + ret = 0; + while (!(NT_SUCCESS(status = (*func_NtSetSecurityObject)(h, + info, + (PSECURITY_DESCRIPTOR)desc)))) + { /* Failed to set the requested parts of the security descriptor. * If the error was permissions-related, try to set fewer parts * of the security descriptor, unless * WIMLIB_EXTRACT_FLAG_STRICT_ACLS is enabled. */ - if ((err == ERROR_PRIVILEGE_NOT_HELD || - err == ERROR_ACCESS_DENIED) && + if ((status == STATUS_PRIVILEGE_NOT_HELD || + status == STATUS_ACCESS_DENIED) && !(ctx->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS)) { if (info & SACL_SECURITY_INFORMATION) { @@ -830,16 +980,13 @@ win32_set_security_descriptor(const wchar_t *path, const u8 *desc, * security descriptor could not be set. */ if (!(info & SACL_SECURITY_INFORMATION)) ctx->partial_security_descriptors--; - set_errno_from_win32_error(err); + set_errno_from_nt_status(status); ret = WIMLIB_ERR_SET_SECURITY; break; } /* Close handle opened for NtSetSecurityObject(). */ -#ifdef WITH_NTDLL - if (func_NtSetSecurityObject) - CloseHandle(h); -#endif + CloseHandle(h); return ret; }