svchost: Implementation of svchost.

.gitignore

@@ -676,6 +676,7 @@ programs/rundll32/rundll32
 programs/spoolsv/spoolsv
 programs/start/rsrc.res
 programs/start/start
+programs/svchost/svchost
 programs/taskmgr/taskmgr
 programs/taskmgr/taskmgr.res
 programs/uninstaller/rsrc.res

Makefile.in

@@ -491,6 +491,7 @@ ALL_MAKEFILES = \
 	programs/rundll32/Makefile \
 	programs/spoolsv/Makefile \
 	programs/start/Makefile \
+	programs/svchost/Makefile \
 	programs/taskmgr/Makefile \
 	programs/uninstaller/Makefile \
 	programs/view/Makefile \
@@ -871,6 +872,7 @@ programs/rpcss/Makefile: programs/rpcss/Makefile.in programs/Makeprog.rules
 programs/rundll32/Makefile: programs/rundll32/Makefile.in programs/Makeprog.rules
 programs/spoolsv/Makefile: programs/spoolsv/Makefile.in programs/Makeprog.rules
 programs/start/Makefile: programs/start/Makefile.in programs/Makeprog.rules
+programs/svchost/Makefile: programs/svchost/Makefile.in programs/Makeprog.rules
 programs/taskmgr/Makefile: programs/taskmgr/Makefile.in programs/Makeprog.rules
 programs/uninstaller/Makefile: programs/uninstaller/Makefile.in programs/Makeprog.rules
 programs/view/Makefile: programs/view/Makefile.in programs/Makeprog.rules

configure

@@ -21191,6 +21191,8 @@ ac_config_files="$ac_config_files programs/spoolsv/Makefile"
 
 ac_config_files="$ac_config_files programs/start/Makefile"
 
+ac_config_files="$ac_config_files programs/svchost/Makefile"
+
 ac_config_files="$ac_config_files programs/taskmgr/Makefile"
 
 ac_config_files="$ac_config_files programs/uninstaller/Makefile"
@@ -22154,6 +22156,7 @@ do
     "programs/rundll32/Makefile") CONFIG_FILES="$CONFIG_FILES programs/rundll32/Makefile" ;;
     "programs/spoolsv/Makefile") CONFIG_FILES="$CONFIG_FILES programs/spoolsv/Makefile" ;;
     "programs/start/Makefile") CONFIG_FILES="$CONFIG_FILES programs/start/Makefile" ;;
+    "programs/svchost/Makefile") CONFIG_FILES="$CONFIG_FILES programs/svchost/Makefile" ;;
     "programs/taskmgr/Makefile") CONFIG_FILES="$CONFIG_FILES programs/taskmgr/Makefile" ;;
     "programs/uninstaller/Makefile") CONFIG_FILES="$CONFIG_FILES programs/uninstaller/Makefile" ;;
     "programs/view/Makefile") CONFIG_FILES="$CONFIG_FILES programs/view/Makefile" ;;

configure.ac

@@ -1912,6 +1912,7 @@ AC_CONFIG_FILES([programs/rpcss/Makefile])
 AC_CONFIG_FILES([programs/rundll32/Makefile])
 AC_CONFIG_FILES([programs/spoolsv/Makefile])
 AC_CONFIG_FILES([programs/start/Makefile])
+AC_CONFIG_FILES([programs/svchost/Makefile])
 AC_CONFIG_FILES([programs/taskmgr/Makefile])
 AC_CONFIG_FILES([programs/uninstaller/Makefile])
 AC_CONFIG_FILES([programs/view/Makefile])

programs/Makefile.in

@@ -27,6 +27,7 @@ SUBDIRS = \
 	rundll32 \
 	spoolsv \
 	start \
+	svchost \
 	taskmgr \
 	uninstaller \
 	view \
@@ -70,6 +71,7 @@ INSTALLSUBDIRS = \
 	rundll32 \
 	spoolsv \
 	start \
+	svchost \
 	taskmgr \
 	uninstaller \
 	wineboot \

programs/svchost/Makefile.in

+TOPSRCDIR = @top_srcdir@
+TOPOBJDIR = ../..
+SRCDIR    = @srcdir@
+VPATH     = @srcdir@
+MODULE    = svchost.exe
+APPMODE   = -municode
+IMPORTS   = advapi32 kernel32
+
+C_SRCS = \
+	svchost.c
+
+@MAKE_PROG_RULES@
+
+@DEPENDENCIES@  # everything below this line is overwritten by make depend

programs/svchost/svchost.c

+/*
+ * Implementation of svchost.exe
+ *
+ * Copyright 2007 Google (Roy Shea)
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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 library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/* Usage:
+ * Starting a service group:
+ *
+ *      svchost /k service_group_name
+ */
+
+#include <stdarg.h>
+
+#include "windef.h"
+#include "winbase.h"
+#include "winreg.h"
+#include "winsvc.h"
+#include "wine/debug.h"
+
+WINE_DEFAULT_DEBUG_CHANNEL(svchost);
+
+/* Static strings used throughout svchost */
+static const WCHAR kd[] = {'-','k',0};
+
+static const WCHAR ks[] = {'/','k',0};
+
+static const WCHAR reg_separator[] = {'\\',0};
+
+static const WCHAR service_reg_path[] = {
+    'S','y','s','t','e','m',
+    '\\','C','u','r','r','e','n','t','C','o','n','t','r','o','l','S','e','t',
+    '\\','S','e','r','v','i','c','e','s',0};
+
+static const WCHAR parameters[] = {
+    'P','a','r','a','m','e','t','e','r','s',0};
+
+static const WCHAR service_dll[] = {
+    'S','e','r','v','i','c','e','D','l','l',0};
+
+static const WCHAR svchost_path[] = {
+    'S','o','f','t','w','a','r','e',
+    '\\','M','i','c','r','o','s','o','f','t',
+    '\\','W','i','n','d','o','w','s',' ','N','T',
+    '\\','C','u','r','r','e','n','t','V','e','r','s','i','o','n',
+    '\\','S','v','c','h','o','s','t',0};
+
+static const CHAR service_main[] = "ServiceMain";
+
+/* Allocate and initialize a WSTR containing the queried value */
+static LPWSTR GetRegValue(HKEY service_key, const WCHAR *value_name)
+{
+    DWORD type;
+    DWORD reg_size;
+    DWORD size;
+    LONG ret;
+    LPWSTR value;
+
+    WINE_TRACE("\n");
+
+    ret = RegQueryValueExW(service_key, value_name, NULL, &type, NULL, &reg_size);
+    if (ret != ERROR_SUCCESS)
+    {
+        return NULL;
+    }
+
+    /* Add space for potentially missing NULL terminators in initial alloc.
+     * The worst case REG_MULTI_SZ requires two NULL terminators. */
+    size = reg_size + (2 * sizeof(WCHAR));
+    value = HeapAlloc(GetProcessHeap(), 0, size);
+
+    ret = RegQueryValueExW(service_key, value_name, NULL, &type,
+            (LPBYTE)value, &reg_size);
+    if (ret != ERROR_SUCCESS)
+    {
+        HeapFree(GetProcessHeap(), 0, value);
+        return NULL;
+    }
+
+    /* Explicitly NULL terminate the result */
+    value[size / sizeof(WCHAR) - 1] = '\0';
+    value[size / sizeof(WCHAR) - 2] = '\0';
+
+    return value;
+}
+
+/* Allocate and initialize a WSTR containing the expanded string */
+static LPWSTR ExpandEnv(LPWSTR string)
+{
+    DWORD size;
+    LPWSTR expanded_string;
+
+    WINE_TRACE("\n");
+
+    size = 0;
+    size = ExpandEnvironmentStringsW(string, NULL, size);
+    if (size == 0)
+    {
+        WINE_ERR("cannot expand env vars in %s: %u\n",
+                wine_dbgstr_w(string), GetLastError());
+        return NULL;
+    }
+    expanded_string = HeapAlloc(GetProcessHeap(), 0,
+            (size + 1) * sizeof(WCHAR));
+    if (ExpandEnvironmentStringsW(string, expanded_string, size) == 0)
+    {
+        WINE_ERR("cannot expand env vars in %s: %u\n",
+                wine_dbgstr_w(string), GetLastError());
+        HeapFree(GetProcessHeap(), 0, expanded_string);
+        return NULL;
+    }
+    return expanded_string;
+}
+
+/* Fill in service table entry for a specified service */
+static BOOL AddServiceElem(LPWSTR service_name,
+        SERVICE_TABLE_ENTRYW *service_table_entry)
+{
+    LONG ret;
+    HKEY service_hkey = NULL;
+    LPWSTR service_param_key = NULL;
+    LPWSTR dll_name_short = NULL;
+    LPWSTR dll_name_long = NULL;
+    LPSTR dll_service_main = NULL;
+    HMODULE library = NULL;
+    LPSERVICE_MAIN_FUNCTIONW service_main_func = NULL;
+    BOOL success = FALSE;
+    DWORD reg_size;
+    DWORD size;
+
+    WINE_TRACE("Adding element for %s\n", wine_dbgstr_w(service_name));
+
+    /* Construct registry path to the service's parameters key */
+    size = (lstrlenW(service_reg_path) + lstrlenW(reg_separator) +
+            lstrlenW(service_name) + lstrlenW(reg_separator) +
+            lstrlenW(parameters) + 1);
+    service_param_key = HeapAlloc(GetProcessHeap(), 0, size * sizeof(WCHAR));
+    lstrcpyW(service_param_key, service_reg_path);
+    lstrcatW(service_param_key, reg_separator);
+    lstrcatW(service_param_key, service_name);
+    lstrcatW(service_param_key, reg_separator);
+    lstrcatW(service_param_key, parameters);
+    service_param_key[size - 1] = '\0';
+    ret = RegOpenKeyExW(HKEY_LOCAL_MACHINE, service_param_key, 0,
+            KEY_READ, &service_hkey);
+    if (ret != ERROR_SUCCESS)
+    {
+        WINE_ERR("cannot open key %s, err=%d\n",
+                wine_dbgstr_w(service_param_key), ret);
+        goto cleanup;
+    }
+
+    /* Find DLL associate with service from key */
+    dll_name_short = GetRegValue(service_hkey, service_dll);
+    if (!dll_name_short)
+    {
+        WINE_ERR("cannot find registry value %s for service %s\n",
+                wine_dbgstr_w(service_dll), wine_dbgstr_w(service_name));
+        RegCloseKey(service_hkey);
+        goto cleanup;
+    }
+
+    /* Expand environment variables in ServiceDll name*/
+    dll_name_long = ExpandEnv(dll_name_short);
+    if (!dll_name_long)
+    {
+        WINE_ERR("failed to expand string %s\n",
+                wine_dbgstr_w(dll_name_short));
+        RegCloseKey(service_hkey);
+        goto cleanup;
+    }
+
+    /* Look for alternate to default ServiceMain entry point */
+    ret = RegQueryValueExA(service_hkey, service_main, NULL, NULL, NULL, &reg_size);
+    if (ret == ERROR_SUCCESS)
+    {
+        /* Add space for potentially missing NULL terminator, allocate, and
+         * fill with the registry value */
+        size = reg_size + 1;
+        dll_service_main = HeapAlloc(GetProcessHeap(), 0, size);
+        ret = RegQueryValueExA(service_hkey, service_main, NULL, NULL,
+                (LPBYTE)dll_service_main, &reg_size);
+        if (ret != ERROR_SUCCESS)
+        {
+            RegCloseKey(service_hkey);
+            goto cleanup;
+        }
+        dll_service_main[size - 1] = '\0';
+    }
+    RegCloseKey(service_hkey);
+
+    /* Load the DLL and obtain a pointer to ServiceMain entry point */
+    library = LoadLibraryW(dll_name_long);
+    if (!library)
+    {
+        WINE_ERR("failed to load library %s, err=%u\n",
+                wine_dbgstr_w(dll_name_long), GetLastError());
+        goto cleanup;
+    }
+    if (dll_service_main)
+    {
+        service_main_func =
+            (LPSERVICE_MAIN_FUNCTIONW) GetProcAddress(library, dll_service_main);
+    }
+    else
+    {
+        service_main_func =
+            (LPSERVICE_MAIN_FUNCTIONW) GetProcAddress(library, service_main);
+    }
+    if (!service_main_func)
+    {
+        WINE_ERR("cannot locate ServiceMain procedure in DLL for %s\n",
+                wine_dbgstr_w(service_name));
+        FreeLibrary(library);
+        goto cleanup;
+    }
+
+    /* Fill in the service table entry */
+    service_table_entry->lpServiceName = service_name;
+    service_table_entry->lpServiceProc = service_main_func;
+    success = TRUE;
+
+cleanup:
+    HeapFree(GetProcessHeap(), 0, service_param_key);
+    HeapFree(GetProcessHeap(), 0, dll_name_short);
+    HeapFree(GetProcessHeap(), 0, dll_name_long);
+    HeapFree(GetProcessHeap(), 0, dll_service_main);
+    return success;
+}
+
+/* Initialize the service table for a list (REG_MULTI_SZ) of services */
+static BOOL StartGroupServices(LPWSTR services)
+{
+    LPWSTR service_name = NULL;
+    SERVICE_TABLE_ENTRYW *service_table = NULL;
+    DWORD service_count;
+
+    /* Count the services to load */
+    service_count = 0;
+    service_name = services;
+    while (*service_name != '\0')
+    {
+        ++service_count;
+        service_name = service_name + lstrlenW(service_name);
+        ++service_name;
+    }
+    WINE_TRACE("Service group %s contains %d services\n",
+            wine_dbgstr_w(services), service_count);
+
+    /* Populate the service table */
+    service_table = HeapAlloc(GetProcessHeap(), 0,
+            (service_count + 1) * sizeof(SERVICE_TABLE_ENTRYW));
+    service_count = 0;
+    service_name = services;
+    while (*service_name != '\0')
+    {
+        if (!AddServiceElem(service_name, &service_table[service_count]))
+        {
+            HeapFree(GetProcessHeap(), 0, service_table);
+            return FALSE;
+        }
+        ++service_count;
+        service_name = service_name + lstrlenW(service_name);
+        ++service_name;
+    }
+    service_table[service_count].lpServiceName = NULL;
+    service_table[service_count].lpServiceProc = NULL;
+
+    /* Start the services */
+    if (!StartServiceCtrlDispatcherW(service_table))
+    {
+        WINE_ERR("StartServiceCtrlDispatcherW failed to start %s: %u\n",
+                wine_dbgstr_w(services), GetLastError());
+        HeapFree(GetProcessHeap(), 0, service_table);
+        return FALSE;
+    }
+    HeapFree(GetProcessHeap(), 0, service_table);
+    return TRUE;
+}
+
+/* Find the list of services associated with a group name and start those
+ * services */
+static BOOL LoadGroup(PWCHAR group_name)
+{
+    HKEY group_hkey = NULL;
+    LPWSTR services = NULL;
+    LONG ret;
+
+    WINE_TRACE("Loading service group for %s\n", wine_dbgstr_w(group_name));
+
+    /* Lookup group_name value of svchost registry entry */
+    ret = RegOpenKeyExW(HKEY_LOCAL_MACHINE, svchost_path, 0,
+            KEY_READ, &group_hkey);
+    if (ret != ERROR_SUCCESS)
+    {
+        WINE_ERR("cannot open key %s, err=%d\n",
+                wine_dbgstr_w(svchost_path), ret);
+        return FALSE;
+    }
+    services = GetRegValue(group_hkey, group_name);
+    RegCloseKey(group_hkey);
+    if (!services)
+    {
+        WINE_ERR("cannot find registry value %s in %s\n",
+                wine_dbgstr_w(group_name), wine_dbgstr_w(svchost_path));
+        return FALSE;
+    }
+
+    /* Start services */
+    if (StartGroupServices(services) == FALSE)
+    {
+        WINE_TRACE("Failed to start service group\n");
+        HeapFree(GetProcessHeap(), 0, services);
+        return FALSE;
+    }
+    HeapFree(GetProcessHeap(), 0, services);
+    return TRUE;
+}
+
+/* Load svchost group specified on the command line via the /k option */
+int wmain(int argc, WCHAR *argv[])
+{
+    int option_index;
+
+    WINE_TRACE("\n");
+
+    for (option_index = 1; option_index < argc; option_index++)
+    {
+        if (lstrcmpiW(argv[option_index], ks) == 0 ||
+                lstrcmpiW(argv[option_index], kd) == 0)
+        {
+            ++option_index;
+            if (option_index >= argc)
+            {
+                WINE_ERR("Must specify group to initialize\n");
+                return 0;
+            }
+            if (!LoadGroup(argv[option_index]))
+            {
+                WINE_ERR("Failed to load requested group: %s\n",
+                        wine_dbgstr_w(argv[option_index]));
+                return 0;
+            }
+        }
+        else
+        {
+            WINE_FIXME("Unrecognized option: %s\n",
+                    wine_dbgstr_w(argv[option_index]));
+            return 0;
+        }
+    }
+
+    return 0;
+}