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/*

 * QEMU Guest Agent helpers for win32 service management

 *

 * Copyright IBM Corp. 2012

 *

 * Authors:

 *  Gal Hammer        <ghammer@redhat.com>

 *  Michael Roth      <mdroth@linux.vnet.ibm.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2 or later.

 * See the COPYING file in the top-level directory.

 */

#include <stdlib.h>

#include <stdio.h>

#include <glib.h>

#include <windows.h>

#include "qga/service-win32.h"

static int printf_win_error(const char *text)

{

    DWORD err = GetLastError();

    char *message;

    int n;

    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |

        FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,

        NULL,

        err,

        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),

        (char *)&message, 0,

        NULL);

    n = printf("%s. (Error: %d) %s", text, (int)err, message);

    LocalFree(message);

    return n;

}

int ga_install_service(const char *path, const char *logfile)

{

    SC_HANDLE manager;

    SC_HANDLE service;

    TCHAR module_fname[MAX_PATH];

    GString *cmdline;

    if (GetModuleFileName(NULL, module_fname, MAX_PATH) == 0) {

        printf_win_error("No full path to service's executable");

        return EXIT_FAILURE;

    }

    cmdline = g_string_new(module_fname);

    g_string_append(cmdline, " -d");

    if (path) {

        g_string_append_printf(cmdline, " -p %s", path);

    }

    if (logfile) {

        g_string_append_printf(cmdline, " -l %s -v", logfile);

    }

    g_debug("service's cmdline: %s", cmdline->str);

    manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);

    if (manager == NULL) {

        printf_win_error("No handle to service control manager");

        g_string_free(cmdline, TRUE);

        return EXIT_FAILURE;

    }

    service = CreateService(manager, QGA_SERVICE_NAME, QGA_SERVICE_DISPLAY_NAME,

        SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START,

        SERVICE_ERROR_NORMAL, cmdline->str, NULL, NULL, NULL, NULL, NULL);

    if (service) {

        SERVICE_DESCRIPTION desc = { (char *)QGA_SERVICE_DESCRIPTION };

        ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &desc);

        printf("Service was installed successfully.\n");

    } else {

        printf_win_error("Failed to install service");

    }

    CloseServiceHandle(service);

    CloseServiceHandle(manager);

    g_string_free(cmdline, TRUE);

    return (service == NULL);

}

int ga_uninstall_service(void)

{

    SC_HANDLE manager;

    SC_HANDLE service;

    manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);

    if (manager == NULL) {

        printf_win_error("No handle to service control manager");

        return EXIT_FAILURE;

    }

    service = OpenService(manager, QGA_SERVICE_NAME, DELETE);

    if (service == NULL) {

        printf_win_error("No handle to service");

        CloseServiceHandle(manager);

        return EXIT_FAILURE;

    }

    if (DeleteService(service) == FALSE) {

        printf_win_error("Failed to delete service");

    } else {

        printf("Service was deleted successfully.\n");

    }

    CloseServiceHandle(service);

    CloseServiceHandle(manager);

    return EXIT_SUCCESS;

}