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 = fprintf(stderr, "%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                        const char *state_dir)
  40 {
  41     SC_HANDLE manager;
  42     SC_HANDLE service;
  43     TCHAR module_fname[MAX_PATH];
  44     GString *cmdline;
  45
  46     if (GetModuleFileName(NULL, module_fname, MAX_PATH) == 0) {
  47         printf_win_error("No full path to service's executable");
  48         return EXIT_FAILURE;
  49     }
  50
  51     cmdline = g_string_new(module_fname);
  52     g_string_append(cmdline, " -d");
  53
  54     if (path) {
  55         g_string_append_printf(cmdline, " -p %s", path);
  56     }
  57     if (logfile) {
  58         g_string_append_printf(cmdline, " -l %s -v", logfile);
  59     }
  60     if (state_dir) {
  61         g_string_append_printf(cmdline, " -t %s", state_dir);
  62     }
  63
  64     g_debug("service's cmdline: %s", cmdline->str);
  65
  66     manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
  67     if (manager == NULL) {
  68         printf_win_error("No handle to service control manager");
  69         g_string_free(cmdline, TRUE);
  70         return EXIT_FAILURE;
  71     }
  72
  73     service = CreateService(manager, QGA_SERVICE_NAME, QGA_SERVICE_DISPLAY_NAME,
  74         SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START,
  75         SERVICE_ERROR_NORMAL, cmdline->str, NULL, NULL, NULL, NULL, NULL);
  76
  77     if (service) {
  78         SERVICE_DESCRIPTION desc = { (char *)QGA_SERVICE_DESCRIPTION };
  79         ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &desc);
  80
  81         fprintf(stderr, "Service was installed successfully.\n");
  82     } else {
  83         printf_win_error("Failed to install service");
  84     }
  85
  86     CloseServiceHandle(service);
  87     CloseServiceHandle(manager);
  88
  89     g_string_free(cmdline, TRUE);
  90     return (service == NULL);
  91 }
  92
  93 int ga_uninstall_service(void)
  94 {
  95     SC_HANDLE manager;
  96     SC_HANDLE service;
  97
  98     manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
  99     if (manager == NULL) {
 100         printf_win_error("No handle to service control manager");
 101         return EXIT_FAILURE;
 102     }
 103
 104     service = OpenService(manager, QGA_SERVICE_NAME, DELETE);
 105     if (service == NULL) {
 106         printf_win_error("No handle to service");
 107         CloseServiceHandle(manager);
 108         return EXIT_FAILURE;
 109     }
 110
 111     if (DeleteService(service) == FALSE) {
 112         printf_win_error("Failed to delete service");
 113     } else {
 114         fprintf(stderr, "Service was deleted successfully.\n");
 115     }
 116
 117     CloseServiceHandle(service);
 118     CloseServiceHandle(manager);
 119
 120     return EXIT_SUCCESS;
 121 }