X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Fwin32_apply.c;h=d744268613f9db1ed08c357bc3dd3f84676d13e1;hb=ca0419160ac10e3bb3836a01d53a9960105dc608;hp=9135a7db690839f714d27c7de8db635bde0af7e7;hpb=0cf4f7d1cc404113224c15cc13662acf742f2bf4;p=wimlib

diff --git a/src/win32_apply.c b/src/win32_apply.c
index 9135a7db..d7442686 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.
  *
@@ -30,14 +30,13 @@
 #include "wimlib/win32_common.h"
 
 #include "wimlib/apply.h"
-#include "wimlib/capture.h" /* for mangle_pat()  */
+#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/resource.h"
 #include "wimlib/textfile.h"
 #include "wimlib/xml.h"
-#include "wimlib/wildcard.h"
 #include "wimlib/wim.h"
 #include "wimlib/wimboot.h"
 
@@ -130,7 +129,6 @@ in_prepopulate_list(struct wim_dentry *dentry, struct apply_ctx *ctx)
 {
 	struct string_set *pats;
 	const tchar *path;
-	size_t path_nchars;
 
 	pats = get_private_data(ctx)->prepopulate_pats;
 	if (!pats || !pats->num_strings)
@@ -140,14 +138,7 @@ in_prepopulate_list(struct wim_dentry *dentry, struct apply_ctx *ctx)
 	if (!path)
 		return false;
 
-	path_nchars = tstrlen(path);
-
-	for (size_t i = 0; i < pats->num_strings; i++)
-		if (match_path(path, path_nchars, pats->strings[i],
-			       OS_PREFERRED_PATH_SEPARATOR, true))
-			return true;
-
-	return false;
+	return match_pattern_list(path, tstrlen(path), pats);
 }
 
 static int
@@ -156,6 +147,125 @@ 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
 win32_start_extract(const wchar_t *path, struct apply_ctx *ctx)
 {
@@ -193,7 +303,7 @@ 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;
 	}
 
@@ -348,12 +458,12 @@ 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;
@@ -402,23 +512,48 @@ 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
@@ -705,23 +840,6 @@ 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.
@@ -736,7 +854,9 @@ 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
@@ -748,8 +868,6 @@ 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
@@ -759,83 +877,69 @@ 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) {
@@ -859,16 +963,13 @@ 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;
 }