[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 2008 Red Hat, Inc, |
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| 4 | * 2007 William Jon McCann <mccann@jhu.edu> |
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| 5 | * |
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| 6 | * This program is free software; you can redistribute it and/or modify |
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| 7 | * it under the terms of the GNU General Public License as published by |
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| 8 | * the Free Software Foundation; either version 2 of the License, or |
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| 9 | * (at your option) any later version. |
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| 10 | * |
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| 11 | * This program is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | * GNU General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU General Public License |
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| 17 | * along with this program; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 19 | * |
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| 20 | * Written by : William Jon McCann <mccann@jhu.edu> |
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| 21 | * Ray Strode <rstrode@redhat.com> |
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| 22 | */ |
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| 23 | |
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| 24 | #include "config.h" |
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| 25 | |
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| 26 | #include <stdlib.h> |
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| 27 | #include <stdio.h> |
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| 28 | #include <unistd.h> |
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| 29 | #include <string.h> |
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| 30 | #include <errno.h> |
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| 31 | #include <dirent.h> |
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| 32 | #include <sys/stat.h> |
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| 33 | |
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| 34 | #include <glib.h> |
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| 35 | #include <glib/gi18n.h> |
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| 36 | #include <glib/gstdio.h> |
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| 37 | |
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| 38 | #include "gdm-sessions.h" |
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| 39 | |
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| 40 | typedef struct _GdmSessionFile { |
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| 41 | char *id; |
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| 42 | char *path; |
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| 43 | char *translated_name; |
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| 44 | char *translated_comment; |
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| 45 | } GdmSessionFile; |
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| 46 | |
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| 47 | static GHashTable *gdm_available_sessions_map; |
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| 48 | |
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| 49 | static gboolean gdm_sessions_map_is_initialized = FALSE; |
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| 50 | |
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| 51 | /* adapted from gnome-menus desktop-entries.c */ |
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| 52 | static gboolean |
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| 53 | key_file_is_relevant (GKeyFile *key_file) |
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| 54 | { |
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| 55 | GError *error; |
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| 56 | gboolean no_display; |
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| 57 | gboolean hidden; |
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| 58 | gboolean tryexec_failed; |
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| 59 | char *tryexec; |
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| 60 | |
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| 61 | error = NULL; |
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| 62 | no_display = g_key_file_get_boolean (key_file, |
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| 63 | G_KEY_FILE_DESKTOP_GROUP, |
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| 64 | "NoDisplay", |
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| 65 | &error); |
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| 66 | if (error) { |
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| 67 | no_display = FALSE; |
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| 68 | g_error_free (error); |
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| 69 | } |
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| 70 | |
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| 71 | error = NULL; |
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| 72 | hidden = g_key_file_get_boolean (key_file, |
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| 73 | G_KEY_FILE_DESKTOP_GROUP, |
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| 74 | "Hidden", |
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| 75 | &error); |
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| 76 | if (error) { |
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| 77 | hidden = FALSE; |
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| 78 | g_error_free (error); |
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| 79 | } |
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| 80 | |
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| 81 | tryexec_failed = FALSE; |
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| 82 | tryexec = g_key_file_get_string (key_file, |
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| 83 | G_KEY_FILE_DESKTOP_GROUP, |
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| 84 | "TryExec", |
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| 85 | NULL); |
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| 86 | if (tryexec) { |
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| 87 | char *path; |
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| 88 | |
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| 89 | path = g_find_program_in_path (g_strstrip (tryexec)); |
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| 90 | |
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| 91 | tryexec_failed = (path == NULL); |
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| 92 | |
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| 93 | g_free (path); |
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| 94 | g_free (tryexec); |
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| 95 | } |
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| 96 | |
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| 97 | if (no_display || hidden || tryexec_failed) { |
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| 98 | return FALSE; |
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| 99 | } |
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| 100 | |
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| 101 | return TRUE; |
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| 102 | } |
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| 103 | |
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| 104 | static void |
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| 105 | load_session_file (const char *id, |
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| 106 | const char *path) |
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| 107 | { |
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| 108 | GKeyFile *key_file; |
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| 109 | GError *error; |
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| 110 | gboolean res; |
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| 111 | GdmSessionFile *session; |
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| 112 | |
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| 113 | key_file = g_key_file_new (); |
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| 114 | |
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| 115 | error = NULL; |
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| 116 | res = g_key_file_load_from_file (key_file, path, 0, &error); |
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| 117 | |
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| 118 | if (!res) { |
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| 119 | g_debug ("Failed to load \"%s\": %s\n", path, error->message); |
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| 120 | g_error_free (error); |
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| 121 | goto out; |
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| 122 | } |
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| 123 | |
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| 124 | if (! g_key_file_has_group (key_file, G_KEY_FILE_DESKTOP_GROUP)) { |
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| 125 | goto out; |
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| 126 | } |
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| 127 | |
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| 128 | res = g_key_file_has_key (key_file, G_KEY_FILE_DESKTOP_GROUP, "Name", NULL); |
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| 129 | if (! res) { |
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| 130 | g_debug ("\"%s\" contains no \"Name\" key\n", path); |
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| 131 | goto out; |
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| 132 | } |
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| 133 | |
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| 134 | if (!key_file_is_relevant (key_file)) { |
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| 135 | g_debug ("\"%s\" is hidden or contains non-executable TryExec program\n", path); |
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| 136 | goto out; |
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| 137 | } |
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| 138 | |
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| 139 | session = g_new0 (GdmSessionFile, 1); |
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| 140 | |
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| 141 | session->id = g_strdup (id); |
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| 142 | session->path = g_strdup (path); |
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| 143 | |
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| 144 | session->translated_name = g_key_file_get_locale_string (key_file, G_KEY_FILE_DESKTOP_GROUP, "Name", NULL, NULL); |
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| 145 | session->translated_comment = g_key_file_get_locale_string (key_file, G_KEY_FILE_DESKTOP_GROUP, "Comment", NULL, NULL); |
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| 146 | |
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| 147 | g_hash_table_insert (gdm_available_sessions_map, |
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| 148 | g_strdup (id), |
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| 149 | session); |
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| 150 | out: |
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| 151 | g_key_file_free (key_file); |
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| 152 | } |
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| 153 | |
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| 154 | static void |
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| 155 | collect_sessions_from_directory (const char *dirname) |
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| 156 | { |
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| 157 | GDir *dir; |
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| 158 | const char *filename; |
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| 159 | |
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| 160 | /* FIXME: add file monitor to directory */ |
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| 161 | |
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| 162 | dir = g_dir_open (dirname, 0, NULL); |
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| 163 | if (dir == NULL) { |
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| 164 | return; |
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| 165 | } |
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| 166 | |
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| 167 | while ((filename = g_dir_read_name (dir))) { |
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| 168 | char *id; |
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| 169 | char *full_path; |
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| 170 | |
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| 171 | if (! g_str_has_suffix (filename, ".desktop")) { |
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| 172 | continue; |
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| 173 | } |
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| 174 | id = g_strndup (filename, strlen (filename) - strlen (".desktop")); |
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| 175 | |
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| 176 | full_path = g_build_filename (dirname, filename, NULL); |
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| 177 | |
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| 178 | load_session_file (id, full_path); |
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| 179 | |
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| 180 | g_free (id); |
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| 181 | g_free (full_path); |
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| 182 | } |
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| 183 | |
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| 184 | g_dir_close (dir); |
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| 185 | } |
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| 186 | |
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| 187 | static void |
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| 188 | collect_sessions (void) |
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| 189 | { |
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| 190 | int i; |
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| 191 | const char *search_dirs[] = { |
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| 192 | "/etc/X11/sessions/", |
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| 193 | DMCONFDIR "/Sessions/", |
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| 194 | DATADIR "/gdm/BuiltInSessions/", |
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| 195 | DATADIR "/xsessions/", |
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| 196 | NULL |
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| 197 | }; |
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| 198 | |
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| 199 | if (gdm_available_sessions_map == NULL) { |
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| 200 | gdm_available_sessions_map = g_hash_table_new_full (g_str_hash, g_str_equal, |
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| 201 | g_free, g_free); |
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| 202 | } |
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| 203 | |
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| 204 | for (i = 0; search_dirs [i] != NULL; i++) { |
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| 205 | collect_sessions_from_directory (search_dirs [i]); |
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| 206 | } |
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| 207 | } |
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| 208 | |
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| 209 | char ** |
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| 210 | gdm_get_all_sessions (void) |
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| 211 | { |
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| 212 | GHashTableIter iter; |
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| 213 | gpointer key, value; |
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| 214 | GPtrArray *array; |
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| 215 | |
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| 216 | if (!gdm_sessions_map_is_initialized) { |
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| 217 | collect_sessions (); |
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| 218 | |
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| 219 | gdm_sessions_map_is_initialized = TRUE; |
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| 220 | } |
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| 221 | |
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| 222 | array = g_ptr_array_new (); |
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| 223 | g_hash_table_iter_init (&iter, gdm_available_sessions_map); |
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| 224 | while (g_hash_table_iter_next (&iter, &key, &value)) { |
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| 225 | GdmSessionFile *session; |
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| 226 | |
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| 227 | session = (GdmSessionFile *) value; |
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| 228 | |
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| 229 | g_ptr_array_add (array, g_strdup (session->id)); |
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| 230 | } |
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| 231 | g_ptr_array_add (array, NULL); |
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| 232 | |
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| 233 | return (char **) g_ptr_array_free (array, FALSE); |
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| 234 | } |
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| 235 | |
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| 236 | gboolean |
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| 237 | gdm_get_details_for_session (const char *id, |
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| 238 | char **name, |
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| 239 | char **comment) |
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| 240 | { |
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| 241 | GdmSessionFile *session; |
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| 242 | |
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| 243 | if (!gdm_sessions_map_is_initialized) { |
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| 244 | collect_sessions (); |
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| 245 | |
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| 246 | gdm_sessions_map_is_initialized = TRUE; |
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| 247 | } |
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| 248 | |
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| 249 | session = (GdmSessionFile *) g_hash_table_lookup (gdm_available_sessions_map, |
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| 250 | id); |
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| 251 | |
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| 252 | if (session == NULL) { |
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| 253 | return FALSE; |
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| 254 | } |
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| 255 | |
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| 256 | if (name != NULL) { |
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| 257 | *name = g_strdup (session->translated_name); |
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| 258 | } |
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| 259 | |
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| 260 | if (comment != NULL) { |
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| 261 | *comment = g_strdup (session->translated_comment); |
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| 262 | } |
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| 263 | |
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| 264 | return TRUE; |
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| 265 | } |
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