Add qemu 2.4.0

[kvmfornfv.git] / qemu / qga / service-win32.c

diff --git a/qemu/qga/service-win32.c b/qemu/qga/service-win32.c
new file mode 100644 (file)
index 0000000..aef41f0
--- /dev/null
+++ b/qemu/qga/service-win32.c
@@ -0,0 +1,192 @@
+/*
+ * 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 = fprintf(stderr, "%s. (Error: %d) %s", text, (int)err, message);
+    LocalFree(message);
+
+    return n;
+}
+
+/* Windows command line escaping. Based on
+ * <http://blogs.msdn.com/b/oldnewthing/archive/2010/09/17/10063629.aspx> and
+ * <http://msdn.microsoft.com/en-us/library/windows/desktop/17w5ykft%28v=vs.85%29.aspx>.
+ *
+ * The caller is responsible for initializing @buffer; prior contents are lost.
+ */
+static const char *win_escape_arg(const char *to_escape, GString *buffer)
+{
+    size_t backslash_count;
+    const char *c;
+
+    /* open with a double quote */
+    g_string_assign(buffer, "\"");
+
+    backslash_count = 0;
+    for (c = to_escape; *c != '\0'; ++c) {
+        switch (*c) {
+        case '\\':
+            /* The meaning depends on the first non-backslash character coming
+             * up.
+             */
+            ++backslash_count;
+            break;
+
+        case '"':
+            /* We must escape each pending backslash, then escape the double
+             * quote. This creates a case of "odd number of backslashes [...]
+             * followed by a double quotation mark".
+             */
+            while (backslash_count) {
+                --backslash_count;
+                g_string_append(buffer, "\\\\");
+            }
+            g_string_append(buffer, "\\\"");
+            break;
+
+        default:
+            /* Any pending backslashes are without special meaning, flush them.
+             * "Backslashes are interpreted literally, unless they immediately
+             * precede a double quotation mark."
+             */
+            while (backslash_count) {
+                --backslash_count;
+                g_string_append_c(buffer, '\\');
+            }
+            g_string_append_c(buffer, *c);
+        }
+    }
+
+    /* We're about to close with a double quote in string delimiter role.
+     * Double all pending backslashes, creating a case of "even number of
+     * backslashes [...] followed by a double quotation mark".
+     */
+    while (backslash_count) {
+        --backslash_count;
+        g_string_append(buffer, "\\\\");
+    }
+    g_string_append_c(buffer, '"');
+
+    return buffer->str;
+}
+
+int ga_install_service(const char *path, const char *logfile,
+                       const char *state_dir)
+{
+    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));
+
+    if (path) {
+        g_string_append_printf(cmdline, " -p %s", win_escape_arg(path, esc));
+    }
+    if (logfile) {
+        g_string_append_printf(cmdline, " -l %s -v",
+                               win_escape_arg(logfile, esc));
+    }
+    if (state_dir) {
+        g_string_append_printf(cmdline, " -t %s",
+                               win_escape_arg(state_dir, esc));
+    }
+
+    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");
+        goto out_strings;
+    }
+
+    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 == NULL) {
+        printf_win_error("Failed to install service");
+        goto out_manager;
+    }
+
+    ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &desc);
+    fprintf(stderr, "Service was installed successfully.\n");
+    ret = EXIT_SUCCESS;
+    CloseServiceHandle(service);
+
+out_manager:
+    CloseServiceHandle(manager);
+
+out_strings:
+    g_string_free(cmdline, TRUE);
+    g_string_free(esc, TRUE);
+    return ret;
+}
+
+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 {
+        fprintf(stderr, "Service was deleted successfully.\n");
+    }
+
+    CloseServiceHandle(service);
+    CloseServiceHandle(manager);
+
+    return EXIT_SUCCESS;
+}