+/* Windows-specific code for wimlib-imagex. */
-/* Replacements for functions needed specifically by the 'imagex' program in
- * Windows native builds; also, Windows-specific code to acquire and release
- * privileges needed to backup and restore files */
-
-#ifndef __WIN32__
+#ifndef _WIN32
# error "This file contains Windows code"
#endif
#include "imagex-win32.h"
-#include <windows.h>
-#include <errno.h>
-#include <string.h>
-#include <assert.h>
+#include <fcntl.h>
+#include <io.h>
#include <stdio.h>
+#include <windows.h>
-/* Replacement for glob() in Windows native builds that operates on wide
- * characters. */
-int
-win32_wglob(const wchar_t *pattern, int flags,
- int (*errfunc)(const wchar_t *epath, int eerrno),
- glob_t *pglob)
-{
- WIN32_FIND_DATAW dat;
- DWORD err;
- HANDLE hFind;
- int ret;
- size_t nspaces;
-
- const wchar_t *backslash, *end_slash;
- size_t prefix_len;
-
- backslash = wcsrchr(pattern, L'\\');
- end_slash = wcsrchr(pattern, L'/');
-
- if (backslash > end_slash)
- end_slash = backslash;
-
- if (end_slash)
- prefix_len = end_slash - pattern + 1;
- else
- prefix_len = 0;
-
- /* This function does not support all functionality of the POSIX glob(),
- * so make sure the parameters are consistent with supported
- * functionality. */
- assert(errfunc == NULL);
- assert((flags & GLOB_ERR) == GLOB_ERR);
- assert((flags & ~(GLOB_NOSORT | GLOB_ERR)) == 0);
-
- hFind = FindFirstFileW(pattern, &dat);
- if (hFind == INVALID_HANDLE_VALUE) {
- err = GetLastError();
- if (err == ERROR_FILE_NOT_FOUND) {
- errno = 0;
- return GLOB_NOMATCH;
- } else {
- /* The other possible error codes for FindFirstFile()
- * are undocumented. */
- errno = EIO;
- return GLOB_ABORTED;
- }
- }
- pglob->gl_pathc = 0;
- pglob->gl_pathv = NULL;
- nspaces = 0;
- do {
- wchar_t *path;
- if (pglob->gl_pathc == nspaces) {
- size_t new_nspaces;
- wchar_t **pathv;
-
- new_nspaces = nspaces * 2 + 1;
- pathv = realloc(pglob->gl_pathv,
- new_nspaces * sizeof(pglob->gl_pathv[0]));
- if (!pathv)
- goto oom;
- pglob->gl_pathv = pathv;
- nspaces = new_nspaces;
- }
- size_t filename_len = wcslen(dat.cFileName);
- size_t len_needed = prefix_len + filename_len;
-
- path = malloc((len_needed + 1) * sizeof(wchar_t));
- if (!path)
- goto oom;
-
- wmemcpy(path, pattern, prefix_len);
- wmemcpy(path + prefix_len, dat.cFileName, filename_len + 1);
- pglob->gl_pathv[pglob->gl_pathc++] = path;
- } while (FindNextFileW(hFind, &dat));
- err = GetLastError();
- CloseHandle(hFind);
- if (err == ERROR_NO_MORE_FILES) {
- errno = 0;
- return 0;
- } else {
- /* Other possible error codes for FindNextFile() are
- * undocumented */
- errno = EIO;
- ret = GLOB_ABORTED;
- goto fail_globfree;
- }
-oom:
- CloseHandle(hFind);
- errno = ENOMEM;
- ret = GLOB_NOSPACE;
-fail_globfree:
- globfree(pglob);
- return ret;
-}
-
-void
-globfree(glob_t *pglob)
-{
- size_t i;
- for (i = 0; i < pglob->gl_pathc; i++)
- free(pglob->gl_pathv[i]);
- free(pglob->gl_pathv);
-}
-
-static bool
-win32_modify_privilege(const wchar_t *privilege, bool enable)
-{
- HANDLE hToken;
- LUID luid;
- TOKEN_PRIVILEGES newState;
- bool ret = false;
-
- if (!OpenProcessToken(GetCurrentProcess(),
- TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY,
- &hToken))
- goto out;
-
- if (!LookupPrivilegeValueW(NULL, privilege, &luid))
- goto out;
-
- newState.PrivilegeCount = 1;
- newState.Privileges[0].Luid = luid;
- newState.Privileges[0].Attributes = (enable ? SE_PRIVILEGE_ENABLED : 0);
- ret = AdjustTokenPrivileges(hToken, FALSE, &newState, 0, NULL, NULL);
- CloseHandle(hToken);
-out:
- if (!ret) {
- fwprintf(stderr, L"WARNING: Failed to %ls privilege %s\n",
- enable ? L"enable" : L"disable", privilege);
- fwprintf(stderr,
- L"WARNING: The program will continue, "
- L"but if permission issues are\n"
- L"encountered, you may need to run "
- L"this program as the administrator\n");
- }
- return ret;
-}
-
-static void
-win32_modify_capture_privileges(bool enable)
-{
- win32_modify_privilege(SE_BACKUP_NAME, enable);
- win32_modify_privilege(SE_SECURITY_NAME, enable);
-}
-
-static void
-win32_modify_restore_privileges(bool enable)
+/* Set a file descriptor to binary mode. */
+void set_fd_to_binary_mode(int fd)
{
- win32_modify_privilege(SE_RESTORE_NAME, enable);
- win32_modify_privilege(SE_SECURITY_NAME, enable);
- win32_modify_privilege(SE_TAKE_OWNERSHIP_NAME, enable);
+ _setmode(fd, _O_BINARY);
}
-void
-win32_acquire_capture_privileges()
-{
- win32_modify_capture_privileges(true);
-}
+#include <sddl.h>
-void
-win32_release_capture_privileges()
+static wchar_t *
+get_security_descriptor_string(PSECURITY_DESCRIPTOR desc)
{
- win32_modify_capture_privileges(false);
+ wchar_t *str = NULL;
+ /* 52 characters!!! */
+ ConvertSecurityDescriptorToStringSecurityDescriptorW(
+ desc,
+ SDDL_REVISION_1,
+ OWNER_SECURITY_INFORMATION |
+ GROUP_SECURITY_INFORMATION |
+ DACL_SECURITY_INFORMATION |
+ SACL_SECURITY_INFORMATION,
+ &str,
+ NULL);
+ return str;
}
void
-win32_acquire_restore_privileges()
+win32_print_security_descriptor(const uint8_t *sd, size_t size)
{
- win32_modify_restore_privileges(true);
-}
+ wchar_t *str;
+ const wchar_t *printstr;
-void
-win32_release_restore_privileges()
-{
- win32_modify_restore_privileges(false);
-}
-
-/* Convert a string from the "current Windows codepage" to UTF-16LE. */
-wchar_t *
-win32_mbs_to_wcs(const char *mbs, size_t mbs_nbytes, size_t *num_wchars_ret)
-{
- if (mbs_nbytes > INT_MAX) {
- fwprintf(stderr, L"ERROR: too much data (%zu bytes)!\n",
- mbs_nbytes);
- return NULL;
- }
- if (mbs_nbytes == 0) {
- *num_wchars_ret = 0;
- return (wchar_t*)mbs;
- }
- int len = MultiByteToWideChar(CP_ACP,
- MB_ERR_INVALID_CHARS,
- mbs,
- mbs_nbytes,
- NULL,
- 0);
- if (len <= 0)
- goto out_invalid;
- wchar_t *wcs = malloc(len * sizeof(wchar_t));
- if (!wcs) {
- fwprintf(stderr, L"ERROR: out of memory!\n");
- return NULL;
- }
- int len2 = MultiByteToWideChar(CP_ACP,
- MB_ERR_INVALID_CHARS,
- mbs,
- mbs_nbytes,
- wcs,
- len);
- if (len2 != len) {
- free(wcs);
- goto out_invalid;
- }
- *num_wchars_ret = len;
- return wcs;
-out_invalid:
- fwprintf(stderr,
-L"ERROR: Invalid multi-byte string in the text file you provided as input!\n"
-L" Maybe try converting your text file to UTF-16LE?\n"
- );
- return NULL;
-}
-
-static inline bool
-is_path_separator(wchar_t c)
-{
- return c == L'/' || c == L'\\';
-}
+ /* 'size' is ignored here due to the crappy Windows APIs. Oh well, this
+ * is just for debugging anyway. */
+ str = get_security_descriptor_string((PSECURITY_DESCRIPTOR)sd);
+ if (str)
+ printstr = str;
+ else
+ printstr = L"(invalid)";
-/* basename() (modifying, trailing-slash stripping version) for wide-character
- * strings. */
-wchar_t *
-win32_wbasename(wchar_t *path)
-{
- wchar_t *p = wcschr(path, L'\0');
+ wprintf(L"Security Descriptor = %ls\n", printstr);
- p--;
- while (p >= path && is_path_separator(*p))
- *p-- = '\0';
- while (p >= path && !is_path_separator(*p))
- p--;
- p++;
- return p;
+ LocalFree(str);
}
-
git://wimlib.net / wimlib / blobdiff