qga/service-win32.c

   1 /*
   2  * QEMU Guest Agent helpers for win32 service management
   3  *
   4  * Copyright IBM Corp. 2012
   5  *
   6  * Authors:
   7  *  Gal Hammer        <ghammer@redhat.com>
   8  *  Michael Roth      <mdroth@linux.vnet.ibm.com>
   9  *
  10  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  11  * See the COPYING file in the top-level directory.
  12  */
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15 #include <glib.h>
  16 #include <windows.h>
  17 #include "qga/service-win32.h"
  18
  19 static int printf_win_error(const char *text)
  20 {
  21     DWORD err = GetLastError();
  22     char *message;
  23     int n;
  24
  25     FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
  26         FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
  27         NULL,
  28         err,
  29         MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
  30         (char *)&message, 0,
  31         NULL);
  32     n = printf("%s. (Error: %d) %s", text, (int)err, message);
  33     LocalFree(message);
  34
  35     return n;
  36 }
  37
  38 int ga_install_service(const char *path, const char *logfile)
  39 {
  40     SC_HANDLE manager;
  41     SC_HANDLE service;
  42     TCHAR module_fname[MAX_PATH];
  43     GString *cmdline;
  44
  45     if (GetModuleFileName(NULL, module_fname, MAX_PATH) == 0) {
  46         printf_win_error("No full path to service's executable");
  47         return EXIT_FAILURE;
  48     }
  49
  50     cmdline = g_string_new(module_fname);
  51     g_string_append(cmdline, " -d");
  52
  53     if (path) {
  54         g_string_append_printf(cmdline, " -p %s", path);
  55     }
  56     if (logfile) {
  57         g_string_append_printf(cmdline, " -l %s -v", logfile);
  58     }
  59
  60     g_debug("service's cmdline: %s", cmdline->str);
  61
  62     manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
  63     if (manager == NULL) {
  64         printf_win_error("No handle to service control manager");
  65         g_string_free(cmdline, TRUE);
  66         return EXIT_FAILURE;
  67     }
  68
  69     service = CreateService(manager, QGA_SERVICE_NAME, QGA_SERVICE_DISPLAY_NAME,
  70         SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START,
  71         SERVICE_ERROR_NORMAL, cmdline->str, NULL, NULL, NULL, NULL, NULL);
  72
  73     if (service) {
  74         SERVICE_DESCRIPTION desc = { (char *)QGA_SERVICE_DESCRIPTION };
  75         ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &desc);
  76
  77         printf("Service was installed successfully.\n");
  78     } else {
  79         printf_win_error("Failed to install service");
  80     }
  81
  82     CloseServiceHandle(service);
  83     CloseServiceHandle(manager);
  84
  85     g_string_free(cmdline, TRUE);
  86     return (service == NULL);
  87 }
  88
  89 int ga_uninstall_service(void)
  90 {
  91     SC_HANDLE manager;
  92     SC_HANDLE service;
  93
  94     manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
  95     if (manager == NULL) {
  96         printf_win_error("No handle to service control manager");
  97         return EXIT_FAILURE;
  98     }
  99
 100     service = OpenService(manager, QGA_SERVICE_NAME, DELETE);
 101     if (service == NULL) {
 102         printf_win_error("No handle to service");
 103         CloseServiceHandle(manager);
 104         return EXIT_FAILURE;
 105     }
 106
 107     if (DeleteService(service) == FALSE) {
 108         printf_win_error("Failed to delete service");
 109     } else {
 110         printf("Service was deleted successfully.\n");
 111     }
 112
 113     CloseServiceHandle(service);
 114     CloseServiceHandle(manager);
 115
 116     return EXIT_SUCCESS;
 117 }