[134] | 1 | /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- |
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| 2 | * |
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| 3 | * Copyright (C) 2007 William Jon McCann <mccann@jhu.edu> |
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| 4 | * |
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| 5 | * This program is free software; you can redistribute it and/or modify |
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| 6 | * it under the terms of the GNU General Public License as published by |
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| 7 | * the Free Software Foundation; either version 2 of the License, or |
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| 8 | * (at your option) any later version. |
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| 9 | * |
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| 10 | * This program is distributed in the hope that it will be useful, |
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | * GNU General Public License for more details. |
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| 14 | * |
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| 15 | * You should have received a copy of the GNU General Public License |
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| 16 | * along with this program; if not, write to the Free Software |
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| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 18 | * |
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| 19 | */ |
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| 20 | |
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| 21 | #include "config.h" |
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| 22 | |
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| 23 | #include <stdlib.h> |
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| 24 | #include <stdio.h> |
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| 25 | #include <fcntl.h> |
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| 26 | #include <unistd.h> |
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| 27 | #include <string.h> |
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| 28 | #include <sys/types.h> |
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| 29 | #include <sys/wait.h> |
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| 30 | #include <errno.h> |
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| 31 | #include <ctype.h> |
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| 32 | #include <pwd.h> |
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| 33 | #include <grp.h> |
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| 34 | #include <signal.h> |
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| 35 | #include <sys/resource.h> |
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| 36 | |
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| 37 | #include <glib.h> |
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| 38 | #include <glib/gi18n.h> |
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| 39 | #include <glib/gstdio.h> |
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| 40 | #include <glib-object.h> |
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| 41 | |
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| 42 | #include <X11/Xlib.h> /* for Display */ |
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| 43 | |
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| 44 | #include "gdm-common.h" |
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| 45 | #include "gdm-signal-handler.h" |
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| 46 | |
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| 47 | #include "gdm-server.h" |
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| 48 | |
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| 49 | extern char **environ; |
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| 50 | |
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| 51 | #define GDM_SERVER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GDM_TYPE_SERVER, GdmServerPrivate)) |
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| 52 | |
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| 53 | /* These are the servstat values, also used as server |
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| 54 | * process exit codes */ |
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| 55 | #define SERVER_TIMEOUT 2 /* Server didn't start */ |
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| 56 | #define SERVER_DEAD 250 /* Server stopped */ |
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| 57 | #define SERVER_PENDING 251 /* Server started but not ready for connections yet */ |
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| 58 | #define SERVER_RUNNING 252 /* Server running and ready for connections */ |
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| 59 | #define SERVER_ABORT 253 /* Server failed badly. Suspending display. */ |
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| 60 | |
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| 61 | #define MAX_LOGS 5 |
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| 62 | |
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| 63 | struct GdmServerPrivate |
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| 64 | { |
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| 65 | char *command; |
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| 66 | GPid pid; |
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| 67 | |
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| 68 | gboolean disable_tcp; |
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| 69 | int priority; |
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| 70 | char *user_name; |
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| 71 | char *session_args; |
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| 72 | |
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| 73 | char *log_dir; |
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| 74 | char *display_name; |
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| 75 | char *display_device; |
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| 76 | char *auth_file; |
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| 77 | |
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| 78 | gboolean is_parented; |
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| 79 | char *parent_display_name; |
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| 80 | char *parent_auth_file; |
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| 81 | char *chosen_hostname; |
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| 82 | |
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| 83 | guint child_watch_id; |
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| 84 | }; |
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| 85 | |
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| 86 | enum { |
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| 87 | PROP_0, |
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| 88 | PROP_DISPLAY_NAME, |
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| 89 | PROP_DISPLAY_DEVICE, |
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| 90 | PROP_AUTH_FILE, |
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| 91 | PROP_IS_PARENTED, |
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| 92 | PROP_PARENT_DISPLAY_NAME, |
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| 93 | PROP_PARENT_AUTH_FILE, |
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| 94 | PROP_CHOSEN_HOSTNAME, |
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| 95 | PROP_COMMAND, |
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| 96 | PROP_PRIORITY, |
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| 97 | PROP_USER_NAME, |
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| 98 | PROP_SESSION_ARGS, |
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| 99 | PROP_LOG_DIR, |
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| 100 | PROP_DISABLE_TCP, |
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| 101 | }; |
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| 102 | |
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| 103 | enum { |
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| 104 | READY, |
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| 105 | EXITED, |
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| 106 | DIED, |
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| 107 | LAST_SIGNAL |
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| 108 | }; |
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| 109 | |
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| 110 | static guint signals [LAST_SIGNAL] = { 0, }; |
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| 111 | |
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| 112 | static void gdm_server_class_init (GdmServerClass *klass); |
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| 113 | static void gdm_server_init (GdmServer *server); |
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| 114 | static void gdm_server_finalize (GObject *object); |
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| 115 | |
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| 116 | G_DEFINE_TYPE (GdmServer, gdm_server, G_TYPE_OBJECT) |
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| 117 | |
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| 118 | static char * |
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| 119 | _gdm_server_query_ck_for_display_device (GdmServer *server) |
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| 120 | { |
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| 121 | char *out; |
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| 122 | char *command; |
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| 123 | int status; |
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| 124 | gboolean res; |
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| 125 | GError *error; |
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| 126 | |
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| 127 | g_return_val_if_fail (GDM_IS_SERVER (server), NULL); |
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| 128 | |
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| 129 | error = NULL; |
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| 130 | command = g_strdup_printf (LIBEXECDIR "/ck-get-x11-display-device --display %s", |
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| 131 | server->priv->display_name); |
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| 132 | |
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| 133 | g_debug ("GdmServer: Running helper %s", command); |
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| 134 | out = NULL; |
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| 135 | res = g_spawn_command_line_sync (command, |
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| 136 | &out, |
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| 137 | NULL, |
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| 138 | &status, |
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| 139 | &error); |
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| 140 | if (! res) { |
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| 141 | g_warning ("Could not run helper: %s", error->message); |
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| 142 | g_error_free (error); |
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| 143 | } else { |
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| 144 | out = g_strstrip (out); |
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| 145 | g_debug ("GdmServer: Got tty: '%s'", out); |
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| 146 | } |
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| 147 | |
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| 148 | g_free (command); |
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| 149 | |
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| 150 | return out; |
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| 151 | } |
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| 152 | |
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| 153 | char * |
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| 154 | gdm_server_get_display_device (GdmServer *server) |
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| 155 | { |
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| 156 | if (server->priv->display_device == NULL) { |
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| 157 | server->priv->display_device = |
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| 158 | _gdm_server_query_ck_for_display_device (server); |
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| 159 | |
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| 160 | g_object_notify (G_OBJECT (server), "display-device"); |
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| 161 | } |
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| 162 | |
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| 163 | return g_strdup (server->priv->display_device); |
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| 164 | } |
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| 165 | |
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| 166 | static gboolean |
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| 167 | emit_ready_idle (GdmServer *server) |
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| 168 | { |
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| 169 | g_debug ("GdmServer: Got USR1 from X server - emitting READY"); |
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| 170 | |
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| 171 | g_signal_emit (server, signals[READY], 0); |
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| 172 | return FALSE; |
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| 173 | } |
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| 174 | |
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| 175 | |
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| 176 | static gboolean |
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| 177 | signal_cb (int signo, |
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| 178 | GdmServer *server) |
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| 179 | |
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| 180 | { |
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| 181 | g_idle_add ((GSourceFunc)emit_ready_idle, server); |
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| 182 | |
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| 183 | return TRUE; |
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| 184 | } |
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| 185 | |
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| 186 | static void |
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| 187 | add_ready_handler (GdmServer *server) |
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| 188 | { |
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| 189 | GdmSignalHandler *signal_handler; |
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| 190 | |
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| 191 | signal_handler = gdm_signal_handler_new (); |
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| 192 | gdm_signal_handler_add (signal_handler, |
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| 193 | SIGUSR1, |
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| 194 | (GdmSignalHandlerFunc)signal_cb, |
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| 195 | server); |
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| 196 | g_object_unref (signal_handler); |
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| 197 | } |
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| 198 | |
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| 199 | static void |
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| 200 | remove_ready_handler (GdmServer *server) |
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| 201 | { |
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| 202 | GdmSignalHandler *signal_handler; |
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| 203 | |
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| 204 | signal_handler = gdm_signal_handler_new (); |
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| 205 | gdm_signal_handler_remove_func (signal_handler, |
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| 206 | SIGUSR1, |
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| 207 | (GdmSignalHandlerFunc)signal_cb, |
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| 208 | server); |
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| 209 | g_object_unref (signal_handler); |
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| 210 | } |
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| 211 | |
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| 212 | /* We keep a connection (parent_dsp) open with the parent X server |
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| 213 | * before running a proxy on it to prevent the X server resetting |
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| 214 | * as we open and close other connections. |
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| 215 | * Note that XDMCP servers, by default, reset when the seed X |
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| 216 | * connection closes whereas usually the X server only quits when |
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| 217 | * all X connections have closed. |
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| 218 | */ |
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| 219 | #if 0 |
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| 220 | static gboolean |
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| 221 | connect_to_parent (GdmServer *server) |
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| 222 | { |
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| 223 | int maxtries; |
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| 224 | int openretries; |
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| 225 | |
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| 226 | g_debug ("GdmServer: Connecting to parent display \'%s\'", |
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| 227 | d->parent_disp); |
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| 228 | |
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| 229 | d->parent_dsp = NULL; |
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| 230 | |
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| 231 | maxtries = SERVER_IS_XDMCP (d) ? 10 : 2; |
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| 232 | |
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| 233 | openretries = 0; |
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| 234 | while (openretries < maxtries && |
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| 235 | d->parent_dsp == NULL) { |
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| 236 | d->parent_dsp = XOpenDisplay (d->parent_disp); |
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| 237 | |
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| 238 | if G_UNLIKELY (d->parent_dsp == NULL) { |
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| 239 | g_debug ("GdmServer: Sleeping %d on a retry", 1+openretries*2); |
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| 240 | gdm_sleep_no_signal (1+openretries*2); |
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| 241 | openretries++; |
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| 242 | } |
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| 243 | } |
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| 244 | |
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| 245 | if (d->parent_dsp == NULL) |
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| 246 | gdm_error (_("%s: failed to connect to parent display \'%s\'"), |
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| 247 | "gdm_server_start", d->parent_disp); |
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| 248 | |
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| 249 | return d->parent_dsp != NULL; |
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| 250 | } |
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| 251 | #endif |
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| 252 | |
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| 253 | static gboolean |
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| 254 | gdm_server_resolve_command_line (GdmServer *server, |
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| 255 | const char *vtarg, |
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| 256 | int *argcp, |
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| 257 | char ***argvp) |
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| 258 | { |
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| 259 | int argc; |
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| 260 | char **argv; |
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| 261 | int len; |
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| 262 | int i; |
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| 263 | gboolean gotvtarg = FALSE; |
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| 264 | gboolean query_in_arglist = FALSE; |
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| 265 | |
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| 266 | g_shell_parse_argv (server->priv->command, &argc, &argv, NULL); |
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| 267 | |
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| 268 | for (len = 0; argv != NULL && argv[len] != NULL; len++) { |
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| 269 | char *arg = argv[len]; |
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| 270 | |
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| 271 | /* HACK! Not to add vt argument to servers that already force |
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| 272 | * allocation. Mostly for backwards compat only */ |
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| 273 | if (strncmp (arg, "vt", 2) == 0 && |
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| 274 | isdigit (arg[2]) && |
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| 275 | (arg[3] == '\0' || |
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| 276 | (isdigit (arg[3]) && arg[4] == '\0'))) |
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| 277 | gotvtarg = TRUE; |
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| 278 | if (strcmp (arg, "-query") == 0 || |
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| 279 | strcmp (arg, "-indirect") == 0) |
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| 280 | query_in_arglist = TRUE; |
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| 281 | } |
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| 282 | |
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| 283 | argv = g_renew (char *, argv, len + 10); |
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| 284 | /* shift args down one */ |
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| 285 | for (i = len - 1; i >= 1; i--) { |
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| 286 | argv[i+1] = argv[i]; |
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| 287 | } |
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| 288 | |
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| 289 | /* server number is the FIRST argument, before any others */ |
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| 290 | argv[1] = g_strdup (server->priv->display_name); |
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| 291 | len++; |
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| 292 | |
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| 293 | if (server->priv->auth_file != NULL) { |
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| 294 | argv[len++] = g_strdup ("-auth"); |
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| 295 | argv[len++] = g_strdup (server->priv->auth_file); |
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| 296 | } |
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| 297 | |
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| 298 | if (server->priv->chosen_hostname) { |
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| 299 | /* run just one session */ |
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| 300 | argv[len++] = g_strdup ("-terminate"); |
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| 301 | argv[len++] = g_strdup ("-query"); |
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| 302 | argv[len++] = g_strdup (server->priv->chosen_hostname); |
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| 303 | query_in_arglist = TRUE; |
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| 304 | } |
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| 305 | |
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| 306 | if (server->priv->disable_tcp && ! query_in_arglist) { |
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| 307 | argv[len++] = g_strdup ("-nolisten"); |
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| 308 | argv[len++] = g_strdup ("tcp"); |
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| 309 | } |
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| 310 | |
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| 311 | if (vtarg != NULL && ! gotvtarg) { |
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| 312 | argv[len++] = g_strdup (vtarg); |
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| 313 | } |
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| 314 | |
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| 315 | argv[len++] = NULL; |
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| 316 | |
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| 317 | *argvp = argv; |
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| 318 | *argcp = len; |
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| 319 | |
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| 320 | return TRUE; |
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| 321 | } |
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| 322 | |
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| 323 | static void |
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| 324 | rotate_logs (const char *path, |
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| 325 | guint n_copies) |
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| 326 | { |
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| 327 | int i; |
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| 328 | |
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| 329 | for (i = n_copies - 1; i > 0; i--) { |
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| 330 | char *name_n; |
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| 331 | char *name_n1; |
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| 332 | |
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| 333 | name_n = g_strdup_printf ("%s.%d", path, i); |
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| 334 | if (i > 1) { |
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| 335 | name_n1 = g_strdup_printf ("%s.%d", path, i - 1); |
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| 336 | } else { |
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| 337 | name_n1 = g_strdup (path); |
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| 338 | } |
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| 339 | |
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| 340 | VE_IGNORE_EINTR (g_unlink (name_n)); |
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| 341 | VE_IGNORE_EINTR (g_rename (name_n1, name_n)); |
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| 342 | |
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| 343 | g_free (name_n1); |
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| 344 | g_free (name_n); |
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| 345 | } |
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| 346 | |
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| 347 | VE_IGNORE_EINTR (g_unlink (path)); |
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| 348 | } |
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| 349 | |
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| 350 | static void |
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| 351 | change_user (GdmServer *server) |
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| 352 | { |
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| 353 | struct passwd *pwent; |
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| 354 | |
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| 355 | if (server->priv->user_name == NULL) { |
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| 356 | return; |
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| 357 | } |
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| 358 | |
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| 359 | pwent = getpwnam (server->priv->user_name); |
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| 360 | if (pwent == NULL) { |
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| 361 | g_warning (_("Server was to be spawned by user %s but that user doesn't exist"), |
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| 362 | server->priv->user_name); |
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| 363 | _exit (1); |
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| 364 | } |
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| 365 | |
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| 366 | g_debug ("GdmServer: Changing (uid:gid) for child process to (%d:%d)", |
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| 367 | pwent->pw_uid, |
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| 368 | pwent->pw_gid); |
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| 369 | |
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| 370 | if (pwent->pw_uid != 0) { |
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| 371 | if (setgid (pwent->pw_gid) < 0) { |
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| 372 | g_warning (_("Couldn't set groupid to %d"), |
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| 373 | pwent->pw_gid); |
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| 374 | _exit (1); |
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| 375 | } |
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| 376 | |
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| 377 | if (initgroups (pwent->pw_name, pwent->pw_gid) < 0) { |
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| 378 | g_warning (_("initgroups () failed for %s"), |
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| 379 | pwent->pw_name); |
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| 380 | _exit (1); |
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| 381 | } |
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| 382 | |
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| 383 | if (setuid (pwent->pw_uid) < 0) { |
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| 384 | g_warning (_("Couldn't set userid to %d"), |
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| 385 | (int)pwent->pw_uid); |
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| 386 | _exit (1); |
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| 387 | } |
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| 388 | } else { |
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| 389 | gid_t groups[1] = { 0 }; |
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| 390 | |
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| 391 | if (setgid (0) < 0) { |
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| 392 | g_warning (_("Couldn't set groupid to 0")); |
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| 393 | /* Don't error out, it's not fatal, if it fails we'll |
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| 394 | * just still be */ |
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| 395 | } |
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| 396 | |
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| 397 | /* this will get rid of any suplementary groups etc... */ |
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| 398 | setgroups (1, groups); |
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| 399 | } |
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| 400 | } |
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| 401 | |
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| 402 | static void |
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| 403 | server_child_setup (GdmServer *server) |
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| 404 | { |
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| 405 | int logfd; |
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| 406 | struct sigaction ign_signal; |
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| 407 | sigset_t mask; |
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| 408 | char *log_file; |
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| 409 | char *log_path; |
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| 410 | |
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| 411 | log_file = g_strdup_printf ("%s.log", server->priv->display_name); |
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| 412 | log_path = g_build_filename (server->priv->log_dir, log_file, NULL); |
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| 413 | g_free (log_file); |
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| 414 | |
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| 415 | /* Rotate the X server logs */ |
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| 416 | rotate_logs (log_path, MAX_LOGS); |
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| 417 | |
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| 418 | /* Log all output from spawned programs to a file */ |
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| 419 | g_debug ("GdmServer: Opening logfile for server %s", log_path); |
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| 420 | |
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| 421 | VE_IGNORE_EINTR (g_unlink (log_path)); |
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| 422 | VE_IGNORE_EINTR (logfd = open (log_path, O_CREAT|O_APPEND|O_TRUNC|O_WRONLY|O_EXCL, 0644)); |
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| 423 | |
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| 424 | g_free (log_path); |
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| 425 | |
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| 426 | if (logfd != -1) { |
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| 427 | VE_IGNORE_EINTR (dup2 (logfd, 1)); |
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| 428 | VE_IGNORE_EINTR (dup2 (logfd, 2)); |
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| 429 | close (logfd); |
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| 430 | } else { |
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| 431 | g_warning (_("%s: Could not open logfile for display %s!"), |
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| 432 | "gdm_server_spawn", |
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| 433 | server->priv->display_name); |
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| 434 | } |
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| 435 | |
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| 436 | /* The X server expects USR1/TTIN/TTOU to be SIG_IGN */ |
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| 437 | ign_signal.sa_handler = SIG_IGN; |
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| 438 | ign_signal.sa_flags = SA_RESTART; |
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| 439 | sigemptyset (&ign_signal.sa_mask); |
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| 440 | |
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| 441 | if (sigaction (SIGUSR1, &ign_signal, NULL) < 0) { |
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| 442 | g_warning (_("%s: Error setting %s to %s"), |
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| 443 | "gdm_server_spawn", "USR1", "SIG_IGN"); |
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| 444 | _exit (SERVER_ABORT); |
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| 445 | } |
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| 446 | |
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| 447 | if (sigaction (SIGTTIN, &ign_signal, NULL) < 0) { |
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| 448 | g_warning (_("%s: Error setting %s to %s"), |
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| 449 | "gdm_server_spawn", "TTIN", "SIG_IGN"); |
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| 450 | _exit (SERVER_ABORT); |
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| 451 | } |
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| 452 | |
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| 453 | if (sigaction (SIGTTOU, &ign_signal, NULL) < 0) { |
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| 454 | g_warning (_("%s: Error setting %s to %s"), |
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| 455 | "gdm_server_spawn", "TTOU", "SIG_IGN"); |
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| 456 | _exit (SERVER_ABORT); |
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| 457 | } |
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| 458 | |
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| 459 | /* And HUP and TERM are at SIG_DFL from gdm_unset_signals, |
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| 460 | we also have an empty mask and all that fun stuff */ |
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| 461 | |
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| 462 | /* unblock signals (especially HUP/TERM/USR1) so that we |
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| 463 | * can control the X server */ |
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| 464 | sigemptyset (&mask); |
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| 465 | sigprocmask (SIG_SETMASK, &mask, NULL); |
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| 466 | |
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| 467 | if (server->priv->priority != 0) { |
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| 468 | if (setpriority (PRIO_PROCESS, 0, server->priv->priority)) { |
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| 469 | g_warning (_("%s: Server priority couldn't be set to %d: %s"), |
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| 470 | "gdm_server_spawn", |
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| 471 | server->priv->priority, |
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| 472 | g_strerror (errno)); |
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| 473 | } |
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| 474 | } |
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| 475 | |
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| 476 | setpgid (0, 0); |
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| 477 | |
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| 478 | change_user (server); |
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| 479 | } |
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| 480 | |
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| 481 | static void |
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| 482 | listify_hash (const char *key, |
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| 483 | const char *value, |
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| 484 | GPtrArray *env) |
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| 485 | { |
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| 486 | char *str; |
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| 487 | str = g_strdup_printf ("%s=%s", key, value); |
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| 488 | g_ptr_array_add (env, str); |
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| 489 | } |
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| 490 | |
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| 491 | static GPtrArray * |
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| 492 | get_server_environment (GdmServer *server) |
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| 493 | { |
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| 494 | GPtrArray *env; |
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| 495 | char **l; |
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| 496 | GHashTable *hash; |
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| 497 | |
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| 498 | env = g_ptr_array_new (); |
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| 499 | |
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| 500 | /* create a hash table of current environment, then update keys has necessary */ |
---|
| 501 | hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free); |
---|
| 502 | for (l = environ; *l != NULL; l++) { |
---|
| 503 | char **str; |
---|
| 504 | str = g_strsplit (*l, "=", 2); |
---|
| 505 | g_hash_table_insert (hash, str[0], str[1]); |
---|
| 506 | } |
---|
| 507 | |
---|
| 508 | /* modify environment here */ |
---|
| 509 | if (server->priv->is_parented) { |
---|
| 510 | if (server->priv->parent_auth_file != NULL) { |
---|
| 511 | g_hash_table_insert (hash, g_strdup ("XAUTHORITY"), g_strdup (server->priv->parent_auth_file)); |
---|
| 512 | } |
---|
| 513 | |
---|
| 514 | if (server->priv->parent_display_name != NULL) { |
---|
| 515 | g_hash_table_insert (hash, g_strdup ("DISPLAY"), g_strdup (server->priv->parent_display_name)); |
---|
| 516 | } |
---|
| 517 | } else { |
---|
| 518 | g_hash_table_insert (hash, g_strdup ("DISPLAY="), g_strdup (server->priv->display_name)); |
---|
| 519 | } |
---|
| 520 | |
---|
| 521 | if (server->priv->user_name != NULL) { |
---|
| 522 | struct passwd *pwent; |
---|
| 523 | |
---|
| 524 | pwent = getpwnam (server->priv->user_name); |
---|
| 525 | |
---|
| 526 | if (pwent->pw_dir != NULL |
---|
| 527 | && g_file_test (pwent->pw_dir, G_FILE_TEST_EXISTS)) { |
---|
| 528 | g_hash_table_insert (hash, g_strdup ("HOME"), g_strdup (pwent->pw_dir)); |
---|
| 529 | } else { |
---|
| 530 | /* Hack */ |
---|
| 531 | g_hash_table_insert (hash, g_strdup ("HOME"), g_strdup ("/")); |
---|
| 532 | } |
---|
| 533 | g_hash_table_insert (hash, g_strdup ("SHELL"), g_strdup (pwent->pw_shell)); |
---|
| 534 | g_hash_table_remove (hash, "MAIL"); |
---|
| 535 | } |
---|
| 536 | |
---|
| 537 | g_hash_table_foreach (hash, (GHFunc)listify_hash, env); |
---|
| 538 | g_hash_table_destroy (hash); |
---|
| 539 | |
---|
| 540 | g_ptr_array_add (env, NULL); |
---|
| 541 | |
---|
| 542 | return env; |
---|
| 543 | } |
---|
| 544 | |
---|
| 545 | static void |
---|
| 546 | server_add_xserver_args (GdmServer *server, |
---|
| 547 | int *argc, |
---|
| 548 | char ***argv) |
---|
| 549 | { |
---|
| 550 | int count; |
---|
| 551 | char **args; |
---|
| 552 | int len; |
---|
| 553 | int i; |
---|
| 554 | |
---|
| 555 | len = *argc; |
---|
| 556 | g_shell_parse_argv (server->priv->session_args, &count, &args, NULL); |
---|
| 557 | *argv = g_renew (char *, *argv, len + count + 1); |
---|
| 558 | |
---|
| 559 | for (i=0; i < count;i++) { |
---|
| 560 | *argv[len++] = g_strdup (args[i]); |
---|
| 561 | } |
---|
| 562 | |
---|
| 563 | *argc += count; |
---|
| 564 | |
---|
| 565 | argv[len] = NULL; |
---|
| 566 | g_strfreev (args); |
---|
| 567 | } |
---|
| 568 | |
---|
| 569 | static void |
---|
| 570 | server_child_watch (GPid pid, |
---|
| 571 | int status, |
---|
| 572 | GdmServer *server) |
---|
| 573 | { |
---|
| 574 | g_debug ("GdmServer: child (pid:%d) done (%s:%d)", |
---|
| 575 | (int) pid, |
---|
| 576 | WIFEXITED (status) ? "status" |
---|
| 577 | : WIFSIGNALED (status) ? "signal" |
---|
| 578 | : "unknown", |
---|
| 579 | WIFEXITED (status) ? WEXITSTATUS (status) |
---|
| 580 | : WIFSIGNALED (status) ? WTERMSIG (status) |
---|
| 581 | : -1); |
---|
| 582 | |
---|
| 583 | if (WIFEXITED (status)) { |
---|
| 584 | int code = WEXITSTATUS (status); |
---|
| 585 | g_signal_emit (server, signals [EXITED], 0, code); |
---|
| 586 | } else if (WIFSIGNALED (status)) { |
---|
| 587 | int num = WTERMSIG (status); |
---|
| 588 | g_signal_emit (server, signals [DIED], 0, num); |
---|
| 589 | } |
---|
| 590 | |
---|
| 591 | g_spawn_close_pid (server->priv->pid); |
---|
| 592 | server->priv->pid = -1; |
---|
| 593 | } |
---|
| 594 | |
---|
| 595 | static gboolean |
---|
| 596 | gdm_server_spawn (GdmServer *server, |
---|
| 597 | const char *vtarg) |
---|
| 598 | { |
---|
| 599 | int argc; |
---|
| 600 | gchar **argv = NULL; |
---|
| 601 | GError *error; |
---|
| 602 | GPtrArray *env; |
---|
| 603 | gboolean ret; |
---|
| 604 | char *freeme; |
---|
| 605 | |
---|
| 606 | ret = FALSE; |
---|
| 607 | |
---|
| 608 | /* Figure out the server command */ |
---|
| 609 | argv = NULL; |
---|
| 610 | argc = 0; |
---|
| 611 | gdm_server_resolve_command_line (server, |
---|
| 612 | vtarg, |
---|
| 613 | &argc, |
---|
| 614 | &argv); |
---|
| 615 | |
---|
| 616 | if (server->priv->session_args) { |
---|
| 617 | server_add_xserver_args (server, &argc, &argv); |
---|
| 618 | } |
---|
| 619 | |
---|
| 620 | if (argv[0] == NULL) { |
---|
| 621 | g_warning (_("%s: Empty server command for display %s"), |
---|
| 622 | "gdm_server_spawn", |
---|
| 623 | server->priv->display_name); |
---|
| 624 | _exit (SERVER_ABORT); |
---|
| 625 | } |
---|
| 626 | |
---|
| 627 | env = get_server_environment (server); |
---|
| 628 | |
---|
| 629 | freeme = g_strjoinv (" ", argv); |
---|
| 630 | g_debug ("GdmServer: Starting X server process: %s", freeme); |
---|
| 631 | g_free (freeme); |
---|
| 632 | |
---|
| 633 | error = NULL; |
---|
| 634 | ret = g_spawn_async_with_pipes (NULL, |
---|
| 635 | argv, |
---|
| 636 | (char **)env->pdata, |
---|
| 637 | G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD, |
---|
| 638 | (GSpawnChildSetupFunc)server_child_setup, |
---|
| 639 | server, |
---|
| 640 | &server->priv->pid, |
---|
| 641 | NULL, |
---|
| 642 | NULL, |
---|
| 643 | NULL, |
---|
| 644 | &error); |
---|
| 645 | |
---|
| 646 | if (! ret) { |
---|
| 647 | g_warning ("Could not start command '%s': %s", |
---|
| 648 | server->priv->command, |
---|
| 649 | error->message); |
---|
| 650 | g_error_free (error); |
---|
| 651 | } |
---|
| 652 | |
---|
| 653 | g_strfreev (argv); |
---|
| 654 | g_ptr_array_foreach (env, (GFunc)g_free, NULL); |
---|
| 655 | g_ptr_array_free (env, TRUE); |
---|
| 656 | |
---|
| 657 | g_debug ("GdmServer: Started X server process %d - waiting for READY", (int)server->priv->pid); |
---|
| 658 | |
---|
| 659 | server->priv->child_watch_id = g_child_watch_add (server->priv->pid, |
---|
| 660 | (GChildWatchFunc)server_child_watch, |
---|
| 661 | server); |
---|
| 662 | |
---|
| 663 | return ret; |
---|
| 664 | } |
---|
| 665 | |
---|
| 666 | /** |
---|
| 667 | * gdm_server_start: |
---|
| 668 | * @disp: Pointer to a GdmDisplay structure |
---|
| 669 | * |
---|
| 670 | * Starts a local X server. Handles retries and fatal errors properly. |
---|
| 671 | */ |
---|
| 672 | |
---|
| 673 | gboolean |
---|
| 674 | gdm_server_start (GdmServer *server) |
---|
| 675 | { |
---|
| 676 | gboolean res; |
---|
| 677 | |
---|
| 678 | /* fork X server process */ |
---|
| 679 | res = gdm_server_spawn (server, NULL); |
---|
| 680 | |
---|
| 681 | return res; |
---|
| 682 | } |
---|
| 683 | |
---|
| 684 | static void |
---|
| 685 | server_died (GdmServer *server) |
---|
| 686 | { |
---|
| 687 | int exit_status; |
---|
| 688 | |
---|
| 689 | g_debug ("GdmServer: Waiting on process %d", server->priv->pid); |
---|
| 690 | exit_status = gdm_wait_on_pid (server->priv->pid); |
---|
| 691 | |
---|
| 692 | if (WIFEXITED (exit_status) && (WEXITSTATUS (exit_status) != 0)) { |
---|
| 693 | g_debug ("GdmServer: Wait on child process failed"); |
---|
| 694 | } else { |
---|
| 695 | /* exited normally */ |
---|
| 696 | } |
---|
| 697 | |
---|
| 698 | g_spawn_close_pid (server->priv->pid); |
---|
| 699 | server->priv->pid = -1; |
---|
| 700 | |
---|
| 701 | if (server->priv->display_device != NULL) { |
---|
| 702 | g_free (server->priv->display_device); |
---|
| 703 | server->priv->display_device = NULL; |
---|
| 704 | g_object_notify (G_OBJECT (server), "display-device"); |
---|
| 705 | } |
---|
| 706 | |
---|
| 707 | g_debug ("GdmServer: Server died"); |
---|
| 708 | } |
---|
| 709 | |
---|
| 710 | gboolean |
---|
| 711 | gdm_server_stop (GdmServer *server) |
---|
| 712 | { |
---|
| 713 | int res; |
---|
| 714 | |
---|
| 715 | if (server->priv->pid <= 1) { |
---|
| 716 | return TRUE; |
---|
| 717 | } |
---|
| 718 | |
---|
| 719 | /* remove watch source before we can wait on child */ |
---|
| 720 | if (server->priv->child_watch_id > 0) { |
---|
| 721 | g_source_remove (server->priv->child_watch_id); |
---|
| 722 | server->priv->child_watch_id = 0; |
---|
| 723 | } |
---|
| 724 | |
---|
| 725 | g_debug ("GdmServer: Stopping server"); |
---|
| 726 | |
---|
| 727 | res = gdm_signal_pid (server->priv->pid, SIGTERM); |
---|
| 728 | if (res < 0) { |
---|
| 729 | } else { |
---|
| 730 | server_died (server); |
---|
| 731 | } |
---|
| 732 | |
---|
| 733 | return TRUE; |
---|
| 734 | } |
---|
| 735 | |
---|
| 736 | |
---|
| 737 | static void |
---|
| 738 | _gdm_server_set_display_name (GdmServer *server, |
---|
| 739 | const char *name) |
---|
| 740 | { |
---|
| 741 | g_free (server->priv->display_name); |
---|
| 742 | server->priv->display_name = g_strdup (name); |
---|
| 743 | } |
---|
| 744 | |
---|
| 745 | static void |
---|
| 746 | _gdm_server_set_auth_file (GdmServer *server, |
---|
| 747 | const char *auth_file) |
---|
| 748 | { |
---|
| 749 | g_free (server->priv->auth_file); |
---|
| 750 | server->priv->auth_file = g_strdup (auth_file); |
---|
| 751 | } |
---|
| 752 | |
---|
| 753 | static void |
---|
| 754 | _gdm_server_set_user_name (GdmServer *server, |
---|
| 755 | const char *name) |
---|
| 756 | { |
---|
| 757 | g_free (server->priv->user_name); |
---|
| 758 | server->priv->user_name = g_strdup (name); |
---|
| 759 | } |
---|
| 760 | |
---|
| 761 | static void |
---|
| 762 | _gdm_server_set_disable_tcp (GdmServer *server, |
---|
| 763 | gboolean disabled) |
---|
| 764 | { |
---|
| 765 | server->priv->disable_tcp = disabled; |
---|
| 766 | } |
---|
| 767 | |
---|
| 768 | static void |
---|
| 769 | gdm_server_set_property (GObject *object, |
---|
| 770 | guint prop_id, |
---|
| 771 | const GValue *value, |
---|
| 772 | GParamSpec *pspec) |
---|
| 773 | { |
---|
| 774 | GdmServer *self; |
---|
| 775 | |
---|
| 776 | self = GDM_SERVER (object); |
---|
| 777 | |
---|
| 778 | switch (prop_id) { |
---|
| 779 | case PROP_DISPLAY_NAME: |
---|
| 780 | _gdm_server_set_display_name (self, g_value_get_string (value)); |
---|
| 781 | break; |
---|
| 782 | case PROP_AUTH_FILE: |
---|
| 783 | _gdm_server_set_auth_file (self, g_value_get_string (value)); |
---|
| 784 | break; |
---|
| 785 | case PROP_USER_NAME: |
---|
| 786 | _gdm_server_set_user_name (self, g_value_get_string (value)); |
---|
| 787 | break; |
---|
| 788 | case PROP_DISABLE_TCP: |
---|
| 789 | _gdm_server_set_disable_tcp (self, g_value_get_boolean (value)); |
---|
| 790 | break; |
---|
| 791 | default: |
---|
| 792 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
---|
| 793 | break; |
---|
| 794 | } |
---|
| 795 | } |
---|
| 796 | |
---|
| 797 | static void |
---|
| 798 | gdm_server_get_property (GObject *object, |
---|
| 799 | guint prop_id, |
---|
| 800 | GValue *value, |
---|
| 801 | GParamSpec *pspec) |
---|
| 802 | { |
---|
| 803 | GdmServer *self; |
---|
| 804 | |
---|
| 805 | self = GDM_SERVER (object); |
---|
| 806 | |
---|
| 807 | switch (prop_id) { |
---|
| 808 | case PROP_DISPLAY_NAME: |
---|
| 809 | g_value_set_string (value, self->priv->display_name); |
---|
| 810 | break; |
---|
| 811 | case PROP_DISPLAY_DEVICE: |
---|
| 812 | g_value_take_string (value, |
---|
| 813 | gdm_server_get_display_device (self)); |
---|
| 814 | break; |
---|
| 815 | case PROP_AUTH_FILE: |
---|
| 816 | g_value_set_string (value, self->priv->auth_file); |
---|
| 817 | break; |
---|
| 818 | case PROP_USER_NAME: |
---|
| 819 | g_value_set_string (value, self->priv->user_name); |
---|
| 820 | break; |
---|
| 821 | case PROP_DISABLE_TCP: |
---|
| 822 | g_value_set_boolean (value, self->priv->disable_tcp); |
---|
| 823 | break; |
---|
| 824 | default: |
---|
| 825 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
---|
| 826 | break; |
---|
| 827 | } |
---|
| 828 | } |
---|
| 829 | |
---|
| 830 | static GObject * |
---|
| 831 | gdm_server_constructor (GType type, |
---|
| 832 | guint n_construct_properties, |
---|
| 833 | GObjectConstructParam *construct_properties) |
---|
| 834 | { |
---|
| 835 | GdmServer *server; |
---|
| 836 | |
---|
| 837 | server = GDM_SERVER (G_OBJECT_CLASS (gdm_server_parent_class)->constructor (type, |
---|
| 838 | n_construct_properties, |
---|
| 839 | construct_properties)); |
---|
| 840 | return G_OBJECT (server); |
---|
| 841 | } |
---|
| 842 | |
---|
| 843 | static void |
---|
| 844 | gdm_server_class_init (GdmServerClass *klass) |
---|
| 845 | { |
---|
| 846 | GObjectClass *object_class = G_OBJECT_CLASS (klass); |
---|
| 847 | |
---|
| 848 | object_class->get_property = gdm_server_get_property; |
---|
| 849 | object_class->set_property = gdm_server_set_property; |
---|
| 850 | object_class->constructor = gdm_server_constructor; |
---|
| 851 | object_class->finalize = gdm_server_finalize; |
---|
| 852 | |
---|
| 853 | g_type_class_add_private (klass, sizeof (GdmServerPrivate)); |
---|
| 854 | |
---|
| 855 | signals [READY] = |
---|
| 856 | g_signal_new ("ready", |
---|
| 857 | G_TYPE_FROM_CLASS (object_class), |
---|
| 858 | G_SIGNAL_RUN_LAST, |
---|
| 859 | G_STRUCT_OFFSET (GdmServerClass, ready), |
---|
| 860 | NULL, |
---|
| 861 | NULL, |
---|
| 862 | g_cclosure_marshal_VOID__VOID, |
---|
| 863 | G_TYPE_NONE, |
---|
| 864 | 0); |
---|
| 865 | signals [EXITED] = |
---|
| 866 | g_signal_new ("exited", |
---|
| 867 | G_OBJECT_CLASS_TYPE (object_class), |
---|
| 868 | G_SIGNAL_RUN_FIRST, |
---|
| 869 | G_STRUCT_OFFSET (GdmServerClass, exited), |
---|
| 870 | NULL, |
---|
| 871 | NULL, |
---|
| 872 | g_cclosure_marshal_VOID__INT, |
---|
| 873 | G_TYPE_NONE, |
---|
| 874 | 1, |
---|
| 875 | G_TYPE_INT); |
---|
| 876 | signals [DIED] = |
---|
| 877 | g_signal_new ("died", |
---|
| 878 | G_OBJECT_CLASS_TYPE (object_class), |
---|
| 879 | G_SIGNAL_RUN_FIRST, |
---|
| 880 | G_STRUCT_OFFSET (GdmServerClass, died), |
---|
| 881 | NULL, |
---|
| 882 | NULL, |
---|
| 883 | g_cclosure_marshal_VOID__INT, |
---|
| 884 | G_TYPE_NONE, |
---|
| 885 | 1, |
---|
| 886 | G_TYPE_INT); |
---|
| 887 | |
---|
| 888 | g_object_class_install_property (object_class, |
---|
| 889 | PROP_DISPLAY_NAME, |
---|
| 890 | g_param_spec_string ("display-name", |
---|
| 891 | "name", |
---|
| 892 | "name", |
---|
| 893 | NULL, |
---|
| 894 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY)); |
---|
| 895 | g_object_class_install_property (object_class, |
---|
| 896 | PROP_DISPLAY_DEVICE, |
---|
| 897 | g_param_spec_string ("display-device", |
---|
| 898 | "Display Device", |
---|
| 899 | "Path to terminal display is running on", |
---|
| 900 | NULL, |
---|
| 901 | G_PARAM_READABLE)); |
---|
| 902 | g_object_class_install_property (object_class, |
---|
| 903 | PROP_AUTH_FILE, |
---|
| 904 | g_param_spec_string ("auth-file", |
---|
| 905 | "Authorization File", |
---|
| 906 | "Path to X authorization file", |
---|
| 907 | NULL, |
---|
| 908 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY)); |
---|
| 909 | |
---|
| 910 | g_object_class_install_property (object_class, |
---|
| 911 | PROP_USER_NAME, |
---|
| 912 | g_param_spec_string ("user-name", |
---|
| 913 | "user name", |
---|
| 914 | "user name", |
---|
| 915 | NULL, |
---|
| 916 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 917 | g_object_class_install_property (object_class, |
---|
| 918 | PROP_DISABLE_TCP, |
---|
| 919 | g_param_spec_boolean ("disable-tcp", |
---|
| 920 | NULL, |
---|
| 921 | NULL, |
---|
| 922 | TRUE, |
---|
| 923 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 924 | |
---|
| 925 | } |
---|
| 926 | |
---|
| 927 | static void |
---|
| 928 | gdm_server_init (GdmServer *server) |
---|
| 929 | { |
---|
| 930 | |
---|
| 931 | server->priv = GDM_SERVER_GET_PRIVATE (server); |
---|
| 932 | |
---|
| 933 | server->priv->pid = -1; |
---|
| 934 | server->priv->command = g_strdup (X_SERVER " -br -verbose"); |
---|
| 935 | server->priv->log_dir = g_strdup (LOGDIR); |
---|
| 936 | |
---|
| 937 | add_ready_handler (server); |
---|
| 938 | } |
---|
| 939 | |
---|
| 940 | static void |
---|
| 941 | gdm_server_finalize (GObject *object) |
---|
| 942 | { |
---|
| 943 | GdmServer *server; |
---|
| 944 | |
---|
| 945 | g_return_if_fail (object != NULL); |
---|
| 946 | g_return_if_fail (GDM_IS_SERVER (object)); |
---|
| 947 | |
---|
| 948 | server = GDM_SERVER (object); |
---|
| 949 | |
---|
| 950 | g_return_if_fail (server->priv != NULL); |
---|
| 951 | |
---|
| 952 | remove_ready_handler (server); |
---|
| 953 | |
---|
| 954 | gdm_server_stop (server); |
---|
| 955 | |
---|
| 956 | G_OBJECT_CLASS (gdm_server_parent_class)->finalize (object); |
---|
| 957 | } |
---|
| 958 | |
---|
| 959 | GdmServer * |
---|
| 960 | gdm_server_new (const char *display_name, |
---|
| 961 | const char *auth_file) |
---|
| 962 | { |
---|
| 963 | GObject *object; |
---|
| 964 | |
---|
| 965 | object = g_object_new (GDM_TYPE_SERVER, |
---|
| 966 | "display-name", display_name, |
---|
| 967 | "auth-file", auth_file, |
---|
| 968 | NULL); |
---|
| 969 | |
---|
| 970 | return GDM_SERVER (object); |
---|
| 971 | } |
---|