mirror of
https://github.com/wine-mirror/wine
synced 2024-07-08 20:06:18 +00:00
809d714f24
Make the functions that deal with the service database more object-oriented. Add a finer-grained locking architecture.
459 lines
15 KiB
C
459 lines
15 KiB
C
/*
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* Services - controls services keeps track of their state
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*
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* Copyright 2007 Google (Mikolaj Zalewski)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#define WIN32_LEAN_AND_MEAN
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#include <stdarg.h>
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#include <windows.h>
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#include <winsvc.h>
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#include <rpc.h>
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#include "wine/unicode.h"
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#include "wine/debug.h"
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#include "svcctl.h"
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#include "services.h"
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#define MAX_SERVICE_NAME 260
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WINE_DEFAULT_DEBUG_CHANNEL(service);
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HANDLE g_hStartedEvent;
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struct scmdatabase *active_database;
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static const WCHAR SZ_LOCAL_SYSTEM[] = {'L','o','c','a','l','S','y','s','t','e','m',0};
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/* Registry constants */
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static const WCHAR SZ_SERVICES_KEY[] = { 'S','y','s','t','e','m','\\',
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'C','u','r','r','e','n','t','C','o','n','t','r','o','l','S','e','t','\\',
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'S','e','r','v','i','c','e','s',0 };
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/* Service key values names */
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static const WCHAR SZ_DISPLAY_NAME[] = {'D','i','s','p','l','a','y','N','a','m','e',0 };
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static const WCHAR SZ_TYPE[] = {'T','y','p','e',0 };
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static const WCHAR SZ_START[] = {'S','t','a','r','t',0 };
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static const WCHAR SZ_ERROR[] = {'E','r','r','o','r','C','o','n','t','r','o','l',0 };
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static const WCHAR SZ_IMAGE_PATH[] = {'I','m','a','g','e','P','a','t','h',0};
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static const WCHAR SZ_GROUP[] = {'G','r','o','u','p',0};
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static const WCHAR SZ_DEPEND_ON_SERVICE[] = {'D','e','p','e','n','d','O','n','S','e','r','v','i','c','e',0};
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static const WCHAR SZ_DEPEND_ON_GROUP[] = {'D','e','p','e','n','d','O','n','G','r','o','u','p',0};
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static const WCHAR SZ_OBJECT_NAME[] = {'O','b','j','e','c','t','N','a','m','e',0};
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static const WCHAR SZ_TAG[] = {'T','a','g',0};
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static const WCHAR SZ_DESCRIPTION[] = {'D','e','s','c','r','i','p','t','i','o','n',0};
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DWORD service_create(LPCWSTR name, struct service_entry **entry)
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{
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*entry = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(**entry));
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if (!*entry)
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return ERROR_NOT_ENOUGH_SERVER_MEMORY;
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(*entry)->name = strdupW(name);
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if (!(*entry)->name)
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{
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HeapFree(GetProcessHeap(), 0, *entry);
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return ERROR_NOT_ENOUGH_SERVER_MEMORY;
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}
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(*entry)->control_pipe = INVALID_HANDLE_VALUE;
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return ERROR_SUCCESS;
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}
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void free_service_entry(struct service_entry *entry)
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{
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HeapFree(GetProcessHeap(), 0, entry->name);
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HeapFree(GetProcessHeap(), 0, entry->config.lpBinaryPathName);
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HeapFree(GetProcessHeap(), 0, entry->config.lpDependencies);
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HeapFree(GetProcessHeap(), 0, entry->config.lpLoadOrderGroup);
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HeapFree(GetProcessHeap(), 0, entry->config.lpServiceStartName);
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HeapFree(GetProcessHeap(), 0, entry->config.lpDisplayName);
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HeapFree(GetProcessHeap(), 0, entry->description);
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CloseHandle(entry->control_mutex);
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CloseHandle(entry->control_pipe);
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CloseHandle(entry->status_changed_event);
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HeapFree(GetProcessHeap(), 0, entry);
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}
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static DWORD load_service_config(HKEY hKey, struct service_entry *entry)
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{
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DWORD err;
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WCHAR *wptr;
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if ((err = load_reg_string(hKey, SZ_IMAGE_PATH, TRUE, &entry->config.lpBinaryPathName)) != 0)
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return err;
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if ((err = load_reg_string(hKey, SZ_GROUP, 0, &entry->config.lpLoadOrderGroup)) != 0)
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return err;
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if ((err = load_reg_string(hKey, SZ_OBJECT_NAME, TRUE, &entry->config.lpServiceStartName)) != 0)
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return err;
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if ((err = load_reg_string(hKey, SZ_DISPLAY_NAME, 0, &entry->config.lpDisplayName)) != 0)
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return err;
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if ((err = load_reg_string(hKey, SZ_DESCRIPTION, 0, &entry->description)) != 0)
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return err;
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if ((err = load_reg_multisz(hKey, SZ_DEPEND_ON_SERVICE, &entry->dependOnServices)) != 0)
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return err;
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if ((err = load_reg_multisz(hKey, SZ_DEPEND_ON_GROUP, &entry->dependOnGroups)) != 0)
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return err;
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if ((err = load_reg_dword(hKey, SZ_TYPE, &entry->config.dwServiceType)) != 0)
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return err;
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if ((err = load_reg_dword(hKey, SZ_START, &entry->config.dwStartType)) != 0)
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return err;
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if ((err = load_reg_dword(hKey, SZ_ERROR, &entry->config.dwErrorControl)) != 0)
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return err;
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if ((err = load_reg_dword(hKey, SZ_TAG, &entry->config.dwTagId)) != 0)
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return err;
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WINE_TRACE("Image path = %s\n", wine_dbgstr_w(entry->config.lpBinaryPathName) );
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WINE_TRACE("Group = %s\n", wine_dbgstr_w(entry->config.lpLoadOrderGroup) );
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WINE_TRACE("Service account name = %s\n", wine_dbgstr_w(entry->config.lpServiceStartName) );
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WINE_TRACE("Display name = %s\n", wine_dbgstr_w(entry->config.lpDisplayName) );
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WINE_TRACE("Service dependancies : %s\n", entry->dependOnServices[0] ? "" : "(none)");
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for (wptr = entry->dependOnServices; *wptr; wptr += strlenW(wptr) + 1)
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WINE_TRACE(" * %s\n", wine_dbgstr_w(wptr));
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WINE_TRACE("Group dependancies : %s\n", entry->dependOnGroups[0] ? "" : "(none)");
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for (wptr = entry->dependOnGroups; *wptr; wptr += strlenW(wptr) + 1)
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WINE_TRACE(" * %s\n", wine_dbgstr_w(wptr));
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return ERROR_SUCCESS;
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}
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static DWORD reg_set_string_value(HKEY hKey, LPCWSTR value_name, LPCWSTR string)
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{
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if (!string)
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{
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DWORD err;
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err = RegDeleteValueW(hKey, value_name);
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if (err != ERROR_FILE_NOT_FOUND)
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return err;
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return ERROR_SUCCESS;
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}
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return RegSetValueExW(hKey, value_name, 0, REG_SZ, (LPBYTE)string, sizeof(WCHAR)*(strlenW(string) + 1));
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}
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DWORD save_service_config(struct service_entry *entry)
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{
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DWORD err;
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HKEY hKey = NULL;
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err = RegCreateKeyW(entry->db->root_key, entry->name, &hKey);
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if (err != ERROR_SUCCESS)
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goto cleanup;
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if ((err = reg_set_string_value(hKey, SZ_DISPLAY_NAME, entry->config.lpDisplayName)) != 0)
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goto cleanup;
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if ((err = reg_set_string_value(hKey, SZ_IMAGE_PATH, entry->config.lpBinaryPathName)) != 0)
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goto cleanup;
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if ((err = reg_set_string_value(hKey, SZ_GROUP, entry->config.lpLoadOrderGroup)) != 0)
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goto cleanup;
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if ((err = reg_set_string_value(hKey, SZ_OBJECT_NAME, entry->config.lpServiceStartName)) != 0)
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goto cleanup;
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if ((err = reg_set_string_value(hKey, SZ_DESCRIPTION, entry->description)) != 0)
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goto cleanup;
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if ((err = RegSetValueExW(hKey, SZ_START, 0, REG_DWORD, (LPBYTE)&entry->config.dwStartType, sizeof(DWORD))) != 0)
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goto cleanup;
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if ((err = RegSetValueExW(hKey, SZ_ERROR, 0, REG_DWORD, (LPBYTE)&entry->config.dwErrorControl, sizeof(DWORD))) != 0)
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goto cleanup;
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if ((err = RegSetValueExW(hKey, SZ_TYPE, 0, REG_DWORD, (LPBYTE)&entry->config.dwServiceType, sizeof(DWORD))) != 0)
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goto cleanup;
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if (entry->config.dwTagId)
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err = RegSetValueExW(hKey, SZ_TAG, 0, REG_DWORD, (LPBYTE)&entry->config.dwTagId, sizeof(DWORD));
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else
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err = RegDeleteValueW(hKey, SZ_TAG);
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if (err != 0 && err != ERROR_FILE_NOT_FOUND)
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goto cleanup;
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err = ERROR_SUCCESS;
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cleanup:
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RegCloseKey(hKey);
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return err;
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}
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DWORD scmdatabase_add_service(struct scmdatabase *db, struct service_entry *service)
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{
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int err;
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service->db = db;
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if ((err = save_service_config(service)) != ERROR_SUCCESS)
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{
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WINE_ERR("Couldn't store service configuration: error %u\n", err);
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return ERROR_GEN_FAILURE;
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}
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list_add_tail(&db->services, &service->entry);
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return ERROR_SUCCESS;
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}
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DWORD scmdatabase_remove_service(struct scmdatabase *db, struct service_entry *service)
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{
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int err;
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err = RegDeleteTreeW(db->root_key, service->name);
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if (err != 0)
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return err;
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list_remove(&service->entry);
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service->entry.next = service->entry.prev = NULL;
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return ERROR_SUCCESS;
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}
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BOOL validate_service_name(LPCWSTR name)
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{
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return (name && name[0] && !strchrW(name, '/') && !strchrW(name, '\\'));
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}
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BOOL validate_service_config(struct service_entry *entry)
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{
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if (entry->config.dwServiceType & SERVICE_WIN32 && (entry->config.lpBinaryPathName == NULL || !entry->config.lpBinaryPathName[0]))
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{
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WINE_ERR("Service %s is Win32 but have no image path set\n", wine_dbgstr_w(entry->name));
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return FALSE;
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}
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switch (entry->config.dwServiceType)
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{
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case SERVICE_KERNEL_DRIVER:
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case SERVICE_FILE_SYSTEM_DRIVER:
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case SERVICE_WIN32_OWN_PROCESS:
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case SERVICE_WIN32_SHARE_PROCESS:
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/* No problem */
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break;
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case SERVICE_WIN32_OWN_PROCESS | SERVICE_INTERACTIVE_PROCESS:
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case SERVICE_WIN32_SHARE_PROCESS | SERVICE_INTERACTIVE_PROCESS:
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/* These can be only run as LocalSystem */
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if (entry->config.lpServiceStartName && strcmpiW(entry->config.lpServiceStartName, SZ_LOCAL_SYSTEM) != 0)
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{
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WINE_ERR("Service %s is interactive but has a start name\n", wine_dbgstr_w(entry->name));
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return FALSE;
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}
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break;
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default:
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WINE_ERR("Service %s have unknown service type\n", wine_dbgstr_w(entry->name));
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return FALSE;
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}
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/* StartType can only be a single value (if several values are mixed the result is probably not what was intended) */
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if (entry->config.dwStartType > SERVICE_DISABLED)
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{
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WINE_ERR("Service %s have unknown start type\n", wine_dbgstr_w(entry->name));
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return FALSE;
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}
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/* SERVICE_BOOT_START and SERVICE_SYSTEM_START or only allowed for driver services */
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if (((entry->config.dwStartType == SERVICE_BOOT_START) || (entry->config.dwStartType == SERVICE_SYSTEM_START)) &&
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((entry->config.dwServiceType & SERVICE_WIN32_OWN_PROCESS) || (entry->config.dwServiceType & SERVICE_WIN32_SHARE_PROCESS)))
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{
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WINE_ERR("Service %s - SERVICE_BOOT_START and SERVICE_SYSTEM_START are only allowed for driver services\n", wine_dbgstr_w(entry->name));
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return FALSE;
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}
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if (entry->config.lpServiceStartName == NULL)
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entry->config.lpServiceStartName = strdupW(SZ_LOCAL_SYSTEM);
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return TRUE;
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}
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struct service_entry *scmdatabase_find_service(struct scmdatabase *db, LPCWSTR name)
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{
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struct service_entry *service;
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LIST_FOR_EACH_ENTRY(service, &db->services, struct service_entry, entry)
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{
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if (strcmpiW(name, service->name) == 0)
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return service;
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}
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return NULL;
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}
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struct service_entry *scmdatabase_find_service_by_displayname(struct scmdatabase *db, LPCWSTR name)
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{
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struct service_entry *service;
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LIST_FOR_EACH_ENTRY(service, &db->services, struct service_entry, entry)
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{
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if (strcmpiW(name, service->config.lpDisplayName) == 0)
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return service;
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}
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return NULL;
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}
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void release_service(struct service_entry *service)
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{
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if (InterlockedDecrement(&service->ref_count) == 0 && is_marked_for_delete(service))
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free_service_entry(service);
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}
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static DWORD scmdatabase_create(struct scmdatabase **db)
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{
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DWORD err;
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*db = HeapAlloc(GetProcessHeap(), 0, sizeof(**db));
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if (!*db)
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return ERROR_NOT_ENOUGH_SERVER_MEMORY;
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(*db)->service_start_lock = FALSE;
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list_init(&(*db)->services);
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InitializeCriticalSection(&(*db)->cs);
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err = RegCreateKeyExW(HKEY_LOCAL_MACHINE, SZ_SERVICES_KEY, 0, NULL,
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REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL,
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&(*db)->root_key, NULL);
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if (err != ERROR_SUCCESS)
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HeapFree(GetProcessHeap(), 0, *db);
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return err;
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}
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static void scmdatabase_destroy(struct scmdatabase *db)
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{
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RegCloseKey(db->root_key);
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DeleteCriticalSection(&db->cs);
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HeapFree(GetProcessHeap(), 0, db);
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}
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static DWORD scmdatabase_load_services(struct scmdatabase *db)
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{
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DWORD err;
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int i;
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for (i = 0; TRUE; i++)
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{
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WCHAR szName[MAX_SERVICE_NAME];
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struct service_entry *entry;
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HKEY hServiceKey;
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err = RegEnumKeyW(db->root_key, i, szName, MAX_SERVICE_NAME);
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if (err == ERROR_NO_MORE_ITEMS)
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break;
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if (err != 0)
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{
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WINE_ERR("Error %d reading key %d name - skipping\n", err, i);
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continue;
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}
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err = service_create(szName, &entry);
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if (err != ERROR_SUCCESS)
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break;
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WINE_TRACE("Loading service %s\n", wine_dbgstr_w(szName));
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err = RegOpenKeyExW(db->root_key, szName, 0, KEY_READ | KEY_WRITE, &hServiceKey);
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if (err == ERROR_SUCCESS)
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{
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err = load_service_config(hServiceKey, entry);
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RegCloseKey(hServiceKey);
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}
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if (err != ERROR_SUCCESS)
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{
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WINE_ERR("Error %d reading registry key for service %s - skipping\n", err, wine_dbgstr_w(szName));
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free_service_entry(entry);
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continue;
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}
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if (entry->config.dwServiceType == 0)
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{
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/* Maybe an application only wrote some configuration in the service key. Continue silently */
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WINE_TRACE("Even the service type not set for service %s - skipping\n", wine_dbgstr_w(szName));
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free_service_entry(entry);
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continue;
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}
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if (!validate_service_config(entry))
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{
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WINE_ERR("Invalid configuration of service %s - skipping\n", wine_dbgstr_w(szName));
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free_service_entry(entry);
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continue;
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}
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entry->status.dwServiceType = entry->config.dwServiceType;
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entry->status.dwCurrentState = SERVICE_STOPPED;
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entry->status.dwWin32ExitCode = ERROR_SERVICE_NEVER_STARTED;
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entry->db = db;
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/* all other fields are zero */
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list_add_tail(&db->services, &entry->entry);
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}
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return ERROR_SUCCESS;
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}
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DWORD scmdatabase_lock_startup(struct scmdatabase *db)
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{
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if (InterlockedCompareExchange(&db->service_start_lock, TRUE, FALSE))
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return ERROR_SERVICE_DATABASE_LOCKED;
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return ERROR_SUCCESS;
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}
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void scmdatabase_unlock_startup(struct scmdatabase *db)
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{
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InterlockedCompareExchange(&db->service_start_lock, FALSE, TRUE);
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}
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void scmdatabase_lock_shared(struct scmdatabase *db)
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{
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EnterCriticalSection(&db->cs);
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}
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void scmdatabase_lock_exclusive(struct scmdatabase *db)
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{
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EnterCriticalSection(&db->cs);
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}
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void scmdatabase_unlock(struct scmdatabase *db)
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{
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LeaveCriticalSection(&db->cs);
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}
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void service_lock_shared(struct service_entry *service)
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{
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EnterCriticalSection(&service->db->cs);
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}
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void service_lock_exclusive(struct service_entry *service)
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{
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EnterCriticalSection(&service->db->cs);
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}
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void service_unlock(struct service_entry *service)
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{
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LeaveCriticalSection(&service->db->cs);
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}
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int main(int argc, char *argv[])
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{
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static const WCHAR svcctl_started_event[] = SVCCTL_STARTED_EVENT;
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DWORD err;
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g_hStartedEvent = CreateEventW(NULL, TRUE, FALSE, svcctl_started_event);
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err = scmdatabase_create(&active_database);
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if (err != ERROR_SUCCESS)
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return err;
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if ((err = scmdatabase_load_services(active_database)) != ERROR_SUCCESS)
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return err;
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err = RPC_MainLoop();
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scmdatabase_destroy(active_database);
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return err;
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}
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