Quoting Sameeh Jubran (2017-07-05 02:54:09)
> From: Sameeh Jubran <sjub...@redhat.com>
>
> Currently on Windows whenever the qemu-ga's service doesn't find the
> virtio-serial
> it terminates. This commit addresses this issue by adding a new listener
> service
> which registers for notifications of the virtio-port-serial device handle the
> qemu-ga's service accordingly.
>
> Note that adding a new service to the qga code is much neater and simpler than
> changing the behaviour of the qemu-ga's service as a good portion of the code
> is
> shared between Windows and Linux.
>
> A list of possible scenarios of which could lead to this behavour:
>
> * qemu-ga's service is started while the virtio-serial driver hasn't been
> installed yet
> * hotplug/ unplug of the virtio-serial device
> * upgrading the virtio-serial driver
These don't really strike me as being w32-specific. What happens if we
unplug the virtio-serial device on linux while qemu-ga is running,
or start qemu-ga on linux before virtio-console module is loaded?
Would that trigger the same class of failures?
Maybe we should just add a mode to the various qga/channel*.c
implementations that waits for a particular path to become available,
and then also goes back to waiting for availability if the path
disappears?
Considering that isa-serial is also supported on Windows, and maybe
eventually the virtio-vsock stuff, it seems clunky to require another
service to manage this, especially if it still leaves the issue open
on linux/posix where availability is just as important.
>
> Signed-off-by: Sameeh Jubran <sjub...@redhat.com>
> ---
> Makefile | 11 ++-
> Makefile.objs | 1 +
> qga/Makefile.objs | 2 +
> qga/channel.h | 9 ++
> qga/main.c | 23 +++--
> qga/serial-listener-service-win32.c | 181
> ++++++++++++++++++++++++++++++++++++
> qga/serial-listener-service-win32.h | 29 ++++++
> qga/service-win32.c | 79 +++++++++++++---
> qga/service-win32.h | 3 +
> 9 files changed, 315 insertions(+), 23 deletions(-)
> create mode 100644 qga/serial-listener-service-win32.c
> create mode 100644 qga/serial-listener-service-win32.h
>
> diff --git a/Makefile b/Makefile
> index 22d29d6..3583c8d 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -266,6 +266,7 @@ dummy := $(call unnest-vars,, \
> chardev-obj-y \
> util-obj-y \
> qga-obj-y \
> + qga-serial-listener-obj-y \
> ivshmem-client-obj-y \
> ivshmem-server-obj-y \
> libvhost-user-obj-y \
> @@ -390,6 +391,9 @@ qemu-img-cmds.h: $(SRC_PATH)/qemu-img-cmds.hx
> $(SRC_PATH)/scripts/hxtool
> qemu-ga$(EXESUF): LIBS = $(LIBS_QGA)
> qemu-ga$(EXESUF): QEMU_CFLAGS += -I qga/qapi-generated
>
> +qga-serial-listener$(EXESUF): LIBS = $(LIBS_QGA)
> +qga-serial-listener$(EXESUF): QEMU_CFLAGS += -I qga/qapi-generated
> +
> gen-out-type = $(subst .,-,$(suffix $@))
>
> qapi-py = $(SRC_PATH)/scripts/qapi.py $(SRC_PATH)/scripts/ordereddict.py
> @@ -448,6 +452,11 @@ $(qga-obj-y) qemu-ga.o: $(QGALIB_GEN)
> qemu-ga$(EXESUF): $(qga-obj-y) $(COMMON_LDADDS)
> $(call LINK, $^)
>
> +$(qga-serial-listener-obj-y) qga-serial-listener.o: $(QGALIB_GEN)
> +
> +qga-serial-listener$(EXESUF): $(qga-serial-listener-obj-y) $(COMMON_LDADDS)
> + $(call LINK, $^)
> +
> ifdef QEMU_GA_MSI_ENABLED
> QEMU_GA_MSI=qemu-ga-$(ARCH).msi
>
> @@ -467,7 +476,7 @@ endif
>
> ifneq ($(EXESUF),)
> .PHONY: qemu-ga
> -qemu-ga: qemu-ga$(EXESUF) $(QGA_VSS_PROVIDER) $(QEMU_GA_MSI)
> +qemu-ga: qga-serial-listener$(EXESUF) qemu-ga$(EXESUF) $(QGA_VSS_PROVIDER)
> $(QEMU_GA_MSI)
> endif
>
> ivshmem-client$(EXESUF): $(ivshmem-client-obj-y) $(COMMON_LDADDS)
> diff --git a/Makefile.objs b/Makefile.objs
> index b2e6322..b3fc042 100644
> --- a/Makefile.objs
> +++ b/Makefile.objs
> @@ -103,6 +103,7 @@ target-obj-y += trace/
> # FIXME: a few definitions from qapi-types.o/qapi-visit.o are needed
> # by libqemuutil.a. These should be moved to a separate .json schema.
> qga-obj-y = qga/
> +qga-serial-listener-obj-y = qga/
> qga-vss-dll-obj-y = qga/
>
> ######################################################################
> diff --git a/qga/Makefile.objs b/qga/Makefile.objs
> index 1c5986c..f9d0170 100644
> --- a/qga/Makefile.objs
> +++ b/qga/Makefile.objs
> @@ -5,4 +5,6 @@ qga-obj-$(CONFIG_WIN32) += vss-win32.o
> qga-obj-y += qapi-generated/qga-qapi-types.o qapi-generated/qga-qapi-visit.o
> qga-obj-y += qapi-generated/qga-qmp-marshal.o
>
> +qga-serial-listener-obj-$(CONFIG_WIN32) = service-win32.o
> serial-listener-service-win32.o
> +
> qga-vss-dll-obj-$(CONFIG_QGA_VSS) += vss-win32/
> diff --git a/qga/channel.h b/qga/channel.h
> index 1778416..df53ec9 100644
> --- a/qga/channel.h
> +++ b/qga/channel.h
> @@ -12,6 +12,15 @@
> #ifndef QGA_CHANNEL_H
> #define QGA_CHANNEL_H
>
> +#ifndef _WIN32
> +#define QGA_VIRTIO_PATH_DEFAULT "/dev/virtio-ports/org.qemu.guest_agent.0"
> +#define QGA_STATE_RELATIVE_DIR "run"
> +#define QGA_SERIAL_PATH_DEFAULT "/dev/ttyS0"
> +#else
> +#define QGA_VIRTIO_PATH_DEFAULT "\\\\.\\Global\\org.qemu.guest_agent.0"
> +#define QGA_STATE_RELATIVE_DIR "qemu-ga"
> +#define QGA_SERIAL_PATH_DEFAULT "COM1"
> +#endif
>
> typedef struct GAChannel GAChannel;
>
> diff --git a/qga/main.c b/qga/main.c
> index cc58d2b..44b0822 100644
> --- a/qga/main.c
> +++ b/qga/main.c
> @@ -41,15 +41,6 @@
> #endif
> #endif
>
> -#ifndef _WIN32
> -#define QGA_VIRTIO_PATH_DEFAULT "/dev/virtio-ports/org.qemu.guest_agent.0"
> -#define QGA_STATE_RELATIVE_DIR "run"
> -#define QGA_SERIAL_PATH_DEFAULT "/dev/ttyS0"
> -#else
> -#define QGA_VIRTIO_PATH_DEFAULT "\\\\.\\Global\\org.qemu.guest_agent.0"
> -#define QGA_STATE_RELATIVE_DIR "qemu-ga"
> -#define QGA_SERIAL_PATH_DEFAULT "COM1"
> -#endif
> #ifdef CONFIG_FSFREEZE
> #define QGA_FSFREEZE_HOOK_DEFAULT CONFIG_QEMU_CONFDIR "/fsfreeze-hook"
> #endif
> @@ -1163,6 +1154,10 @@ static void config_parse(GAConfig *config, int argc,
> char **argv)
> if (ga_install_vss_provider()) {
> exit(EXIT_FAILURE);
> }
> + if (ga_install_serial_listener_service(config->channel_path,
> + config->log_filepath, config->state_dir)) {
> + exit(EXIT_FAILURE);
> + }
> if (ga_install_service(config->channel_path,
> config->log_filepath,
> config->state_dir)) {
> exit(EXIT_FAILURE);
> @@ -1170,6 +1165,7 @@ static void config_parse(GAConfig *config, int argc,
> char **argv)
> exit(EXIT_SUCCESS);
> } else if (strcmp(config->service, "uninstall") == 0) {
> ga_uninstall_vss_provider();
> + ga_uninstall_serial_listener_service();
> exit(ga_uninstall_service());
> } else if (strcmp(config->service, "vss-install") == 0) {
> if (ga_install_vss_provider()) {
> @@ -1179,6 +1175,15 @@ static void config_parse(GAConfig *config, int argc,
> char **argv)
> } else if (strcmp(config->service, "vss-uninstall") == 0) {
> ga_uninstall_vss_provider();
> exit(EXIT_SUCCESS);
> + } else if (strcmp(config->service, "sl-install") == 0) {
> + if (ga_install_serial_listener_service(config->channel_path,
> + config->log_filepath, config->state_dir)) {
> + exit(EXIT_FAILURE);
> + }
> + exit(EXIT_SUCCESS);
> + } else if (strcmp(config->service, "sl-uninstall") == 0) {
> + ga_uninstall_serial_listener_service();
> + exit(EXIT_SUCCESS);
> } else {
> printf("Unknown service command.\n");
> exit(EXIT_FAILURE);
> diff --git a/qga/serial-listener-service-win32.c
> b/qga/serial-listener-service-win32.c
> new file mode 100644
> index 0000000..fa22055
> --- /dev/null
> +++ b/qga/serial-listener-service-win32.c
> @@ -0,0 +1,181 @@
> +/*
> + * QEMU Guest Agent helpers for win32 service management
> + *
> + * Authors:
> + * Sameeh Jubran <sjub...@redhat.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 "qemu/osdep.h"
> +#include <windows.h>
> +#include <dbt.h>
> +#include "qga/channel.h"
> +#include "qga/serial-listener-service-win32.h"
> +
> +static const GUID GUID_VIOSERIAL_PORT = { 0x6fde7521, 0x1b65, 0x48ae,
> + { 0xb6, 0x28, 0x80, 0xbe, 0x62, 0x1, 0x60, 0x26 } };
> +
> +GASerialListenerService listener_service;
> +GMainLoop *main_loop;
> +bool barrier;
> +bool qga_vios_exists;
> +
> +DWORD WINAPI handle_serial_device_events(DWORD type, LPVOID data);
> +DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data,
> + LPVOID ctx);
> +VOID WINAPI service_main(DWORD argc, TCHAR * argv[]);
> +static void quit_handler(int sig);
> +static bool virtio_serial_exists(DWORD *err);
> +
> +static bool virtio_serial_exists(DWORD *err)
> +{
> + bool ret = false;
> + HANDLE handle = CreateFile(QGA_VIRTIO_PATH_DEFAULT, GENERIC_READ |
> + GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_FLAG_NO_BUFFERING |
> + FILE_FLAG_OVERLAPPED, NULL);
> +
> + if (handle == INVALID_HANDLE_VALUE) {
> + *err = GetLastError();
> + ret = false;
> + } else {
> + ret = true;
> + }
> + CloseHandle(handle);
> + return ret;
> +}
> +
> +static void quit_handler(int sig)
> +{
> + if (g_main_loop_is_running(main_loop)) {
> + g_main_loop_quit(main_loop);
> + }
> +}
> +
> +DWORD WINAPI handle_serial_device_events(DWORD type, LPVOID data)
> +{
> + DWORD ret = NO_ERROR;
> + DWORD err_code;
> + PDEV_BROADCAST_HDR broadcast_header = (PDEV_BROADCAST_HDR) data;
> + if (barrier &&
> + broadcast_header->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE) {
> + switch (type) {
> + /* Device inserted */
> + case DBT_DEVICEARRIVAL:
> + /* Start QEMU-ga's service */
> + if (!qga_vios_exists && virtio_serial_exists(&err_code)) {
> + start_service(QGA_SERVICE_NAME);
> + qga_vios_exists = true;
> + }
> + break;
> + /* Device removed */
> + case DBT_DEVICEQUERYREMOVE:
> + case DBT_DEVICEREMOVEPENDING:
> + case DBT_DEVICEREMOVECOMPLETE:
> + /* Stop QEMU-ga's service */
> + /* In a stop operation, we need to make sure the virtio-serial
> that
> + * qemu-ga uses is the one that is being ejected. We'll get the
> error
> + * ERROR_FILE_NOT_FOUND when attempting to call CreateFile with
> the
> + * virtio-serial path.
> + */
> + if (qga_vios_exists && !virtio_serial_exists(&err_code) &&
> + err_code == ERROR_FILE_NOT_FOUND) {
> + stop_service(QGA_SERVICE_NAME);
> + qga_vios_exists = false;
> + }
> +
> + break;
> + default:
> + ret = ERROR_CALL_NOT_IMPLEMENTED;
> + }
> + }
> + return ret;
> +}
> +
> +DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data,
> + LPVOID ctx)
> +{
> + DWORD ret = NO_ERROR;
> +
> + switch (ctrl) {
> + case SERVICE_CONTROL_STOP:
> + case SERVICE_CONTROL_SHUTDOWN:
> + quit_handler(SIGTERM);
> + listener_service.qga_service.status.dwCurrentState =
> + SERVICE_STOP_PENDING;
> + SetServiceStatus(listener_service.qga_service.status_handle,
> + &listener_service.qga_service.status);
> + case SERVICE_CONTROL_DEVICEEVENT:
> + handle_serial_device_events(type, data);
> + break;
> +
> + default:
> + ret = ERROR_CALL_NOT_IMPLEMENTED;
> + }
> + return ret;
> +}
> +
> +VOID WINAPI service_main(DWORD argc, TCHAR * argv[])
> +{
> + DWORD err_code = NO_ERROR;
> + qga_vios_exists = barrier = false;
> + listener_service.qga_service.status_handle =
> + RegisterServiceCtrlHandlerEx(QGA_SERIAL_LISTENER_SERVICE_NAME,
> + service_ctrl_handler, NULL);
> +
> + if (listener_service.qga_service.status_handle == 0) {
> + g_critical("Failed to register extended requests function!\n");
> + return;
> + }
> +
> + listener_service.qga_service.status.dwServiceType = SERVICE_WIN32;
> + listener_service.qga_service.status.dwCurrentState = SERVICE_RUNNING;
> + listener_service.qga_service.status.dwControlsAccepted =
> SERVICE_ACCEPT_STOP
> + | SERVICE_ACCEPT_SHUTDOWN;
> + listener_service.qga_service.status.dwWin32ExitCode = NO_ERROR;
> + listener_service.qga_service.status.dwServiceSpecificExitCode = NO_ERROR;
> + listener_service.qga_service.status.dwCheckPoint = 0;
> + listener_service.qga_service.status.dwWaitHint = 0;
> + SetServiceStatus(listener_service.qga_service.status_handle,
> + &listener_service.qga_service.status);
> +
> + DEV_BROADCAST_DEVICEINTERFACE notification_filter;
> + ZeroMemory(¬ification_filter, sizeof(notification_filter));
> + notification_filter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
> + notification_filter.dbcc_size =
> sizeof(DEV_BROADCAST_DEVICEINTERFACE);
> + notification_filter.dbcc_classguid = GUID_VIOSERIAL_PORT;
> +
> + listener_service.device_notification_handle =
> +
> RegisterDeviceNotification(listener_service.qga_service.status_handle,
> + ¬ification_filter, DEVICE_NOTIFY_SERVICE_HANDLE);
> + if (!listener_service.device_notification_handle) {
> + g_critical("Failed to register device notification handle!\n");
> + return;
> + }
> +
> + qga_vios_exists = virtio_serial_exists(&err_code);
> + /* In case qemu-ga is already running then Create file will return Access
> + * denied when trying to open the virtio serial
> + */
> + if (!qga_vios_exists && err_code == ERROR_ACCESS_DENIED) {
> + qga_vios_exists = true;
> + }
> + barrier = true;
> +
> + main_loop = g_main_loop_new(NULL, false);
> + g_main_loop_run(main_loop);
> +
> UnregisterDeviceNotification(listener_service.device_notification_handle);
> + listener_service.qga_service.status.dwCurrentState = SERVICE_STOPPED;
> + SetServiceStatus(listener_service.qga_service.status_handle,
> + &listener_service.qga_service.status);
> +}
> +
> +int main(int argc, char **argv)
> +{
> + SERVICE_TABLE_ENTRY service_table[] = {
> + { (char *)QGA_SERIAL_LISTENER_SERVICE_NAME, service_main },
> + { NULL, NULL } };
> + StartServiceCtrlDispatcher(service_table);
> +
> + return EXIT_SUCCESS;
> +}
> diff --git a/qga/serial-listener-service-win32.h
> b/qga/serial-listener-service-win32.h
> new file mode 100644
> index 0000000..57b47c0
> --- /dev/null
> +++ b/qga/serial-listener-service-win32.h
> @@ -0,0 +1,29 @@
> +/*
> + * QEMU Guest Agent helpers for win32 service management
> + *
> + * Authors:
> + * Sameeh Jubran <sjub...@redhat.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.
> + */
> +
> +#ifndef QGA__SERIAL_LISTENER_SERVICE_WIN32_H
> +#define QGA__SERIAL_LISTENER_SERVICE_WIN32_H
> +
> +#include <service-win32.h>
> +
> +#define QGA_SERIAL_LISTENER_SERVICE_DISPLAY_NAME "QEMU Guest Agent Serial \
> +Listener"
> +#define QGA_SERIAL_LISTENER_SERVICE_NAME "QEMU Guest Agent Serial \
> +Listener"
> +#define QGA_SERIAL_LISTENER_SERVICE_DESCRIPTION "Enables running qemu-ga \
> +service on serial device events"
> +#define QGA_SERIAL_LISTENER_BINARY_NAME "qga-serial-listener.exe"
> +
> +typedef struct GASerialListenerService {
> + GAService qga_service;
> + HDEVNOTIFY device_notification_handle;
> +} GASerialListenerService;
> +
> +#endif
> diff --git a/qga/service-win32.c b/qga/service-win32.c
> index dc41d63..861f9fc 100644
> --- a/qga/service-win32.c
> +++ b/qga/service-win32.c
> @@ -12,7 +12,9 @@
> */
> #include "qemu/osdep.h"
> #include <windows.h>
> +#include "shlwapi.h"
> #include "qga/service-win32.h"
> +#include "qga/serial-listener-service-win32.h"
>
> static int printf_win_error(const char *text)
> {
> @@ -108,6 +110,7 @@ static int get_service(const char *service_name,
> SC_HANDLE* service)
> *service = OpenService(manager, service_name, SERVICE_ALL_ACCESS);
> if (service == NULL) {
> printf_win_error("Failed to open service");
> + CloseServiceHandle(manager);
> return EXIT_FAILURE;
> }
>
> @@ -115,27 +118,23 @@ static int get_service(const char *service_name,
> SC_HANDLE* service)
> return EXIT_SUCCESS;
> }
>
> -int ga_install_service(const char *path, const char *logfile,
> - const char *state_dir)
> +static int install_service(const char *path, const char *logfile,
> + const char *state_dir, TCHAR *binary_path, LPCTSTR service_name,
> + LPCTSTR service_display_name, SERVICE_DESCRIPTION service_desc,
> + bool start_service)
> {
> int ret = EXIT_FAILURE;
> SC_HANDLE manager;
> SC_HANDLE service;
> - TCHAR module_fname[MAX_PATH];
> GString *esc;
> GString *cmdline;
> - SERVICE_DESCRIPTION desc = { (char *)QGA_SERVICE_DESCRIPTION };
>
> - if (GetModuleFileName(NULL, module_fname, MAX_PATH) == 0) {
> - printf_win_error("No full path to service's executable");
> - return EXIT_FAILURE;
> - }
>
> esc = g_string_new("");
> cmdline = g_string_new("");
>
> g_string_append_printf(cmdline, "%s -d",
> - win_escape_arg(module_fname, esc));
> + win_escape_arg(binary_path, esc));
>
> if (path) {
> g_string_append_printf(cmdline, " -p %s", win_escape_arg(path, esc));
> @@ -157,7 +156,7 @@ int ga_install_service(const char *path, const char
> *logfile,
> goto out_strings;
> }
>
> - service = CreateService(manager, QGA_SERVICE_NAME,
> QGA_SERVICE_DISPLAY_NAME,
> + service = CreateService(manager, service_name, 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 == NULL) {
> @@ -165,8 +164,12 @@ int ga_install_service(const char *path, const char
> *logfile,
> goto out_manager;
> }
>
> - ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &desc);
> + ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &service_desc);
> fprintf(stderr, "Service was installed successfully.\n");
> +
> + if (start_service && StartService(service, 0, NULL)) {
> + fprintf(stderr, "Service was started successfully.\n");
> + }
> ret = EXIT_SUCCESS;
> CloseServiceHandle(service);
>
> @@ -179,7 +182,21 @@ out_strings:
> return ret;
> }
>
> -int ga_uninstall_service(void)
> +int ga_install_service(const char *path, const char *logfile,
> + const char *state_dir)
> +{
> + TCHAR module_fname[MAX_PATH];
> +
> + if (GetModuleFileName(NULL, module_fname, MAX_PATH) == 0) {
> + printf_win_error("No full path to service's executable");
> + return EXIT_FAILURE;
> + }
> + SERVICE_DESCRIPTION service_desc = { (char *)QGA_SERVICE_DESCRIPTION };
> + return install_service(path, logfile, state_dir, module_fname,
> + QGA_SERVICE_NAME, QGA_SERVICE_DISPLAY_NAME, service_desc, true);
> +}
> +
> +static int uninstall_service(LPCTSTR service_name)
> {
> SC_HANDLE manager;
> SC_HANDLE service;
> @@ -190,7 +207,7 @@ int ga_uninstall_service(void)
> return EXIT_FAILURE;
> }
>
> - service = OpenService(manager, QGA_SERVICE_NAME, DELETE);
> + service = OpenService(manager, service_name, DELETE);
> if (service == NULL) {
> printf_win_error("No handle to service");
> CloseServiceHandle(manager);
> @@ -209,6 +226,42 @@ int ga_uninstall_service(void)
> return EXIT_SUCCESS;
> }
>
> +int ga_uninstall_service(void)
> +{
> + return uninstall_service(QGA_SERVICE_NAME);
> +}
> +
> +int ga_install_serial_listener_service(const char *path, const char *logfile,
> + const char *state_dir)
> +{
> + TCHAR module_fname[MAX_PATH];
> + TCHAR binary_path[MAX_PATH];
> +
> + if (GetModuleFileName(NULL, module_fname, MAX_PATH) == 0) {
> + printf_win_error("No full path to service's executable");
> + return EXIT_FAILURE;
> + }
> + fprintf(stderr, "ga_install_serial_listener_service: module name: %s\n",
> + module_fname);
> + PathRemoveFileSpec(module_fname);
> + if (SearchPath(module_fname, QGA_SERIAL_LISTENER_BINARY_NAME, NULL,
> + MAX_PATH, binary_path, NULL) == 0) {
> + printf_win_error("No full path to service's executable");
> + return EXIT_FAILURE;
> + }
> +
> + SERVICE_DESCRIPTION service_desc = {
> + (char *)QGA_SERIAL_LISTENER_SERVICE_DESCRIPTION };
> + return install_service(path, logfile, state_dir, binary_path,
> + QGA_SERIAL_LISTENER_SERVICE_NAME,
> + QGA_SERIAL_LISTENER_SERVICE_DISPLAY_NAME, service_desc, true);
> +}
> +
> +int ga_uninstall_serial_listener_service(void)
> +{
> + return uninstall_service(QGA_SERIAL_LISTENER_SERVICE_NAME);
> +}
> +
> int start_service(const char *service_name)
> {
> int ret = EXIT_FAILURE;
> diff --git a/qga/service-win32.h b/qga/service-win32.h
> index 65248ea..2728303 100644
> --- a/qga/service-win32.h
> +++ b/qga/service-win32.h
> @@ -28,6 +28,9 @@ typedef struct GAService {
> int ga_install_service(const char *path, const char *logfile,
> const char *state_dir);
> int ga_uninstall_service(void);
> +int ga_install_serial_listener_service(const char *path, const char *logfile,
> + const char *state_dir);
> +int ga_uninstall_serial_listener_service(void);
> int start_service(const char *service_name);
> int stop_service(const char *service_name);
>
> --
> 2.9.4
>
