1 /*
2 * Copyright (C) 2010-2011 Robert Ancell.
3 * Author: Robert Ancell <robert.ancell@canonical.com>
4 *
5 * This program is free software: you can redistribute it and/or modify it under
6 * the terms of the GNU General Public License as published by the Free Software
7 * Foundation, either version 3 of the License, or (at your option) any later
8 * version. See http://www.gnu.org/copyleft/gpl.html the full text of the
9 * license.
10 */
11
12 #include <string.h>
13 #include <ctype.h>
14
15 #include "guest-account.h"
16 #include "configuration.h"
17
18 static gchar *
get_setup_script(void)19 get_setup_script (void)
20 {
21 static gchar *setup_script = NULL;
22
23 if (setup_script)
24 return setup_script;
25
26 g_autofree gchar *script = config_get_string (config_get_instance (), "LightDM", "guest-account-script");
27 if (!script)
28 return NULL;
29
30 setup_script = g_find_program_in_path (script);
31
32 return setup_script;
33 }
34
35 gboolean
guest_account_is_installed(void)36 guest_account_is_installed (void)
37 {
38 return get_setup_script () != NULL;
39 }
40
41 static gboolean
run_script(const gchar * script,gchar ** stdout_text,gint * exit_status,GError ** error)42 run_script (const gchar *script, gchar **stdout_text, gint *exit_status, GError **error)
43 {
44 gint argc;
45 g_auto(GStrv) argv = NULL;
46 if (!g_shell_parse_argv (script, &argc, &argv, error))
47 return FALSE;
48
49 gboolean result = g_spawn_sync (NULL, argv, NULL,
50 G_SPAWN_SEARCH_PATH,
51 NULL, NULL,
52 stdout_text, NULL, exit_status, error);
53
54 return result;
55 }
56
57 gchar *
guest_account_setup(void)58 guest_account_setup (void)
59 {
60 g_autofree gchar *command = g_strdup_printf ("%s add", get_setup_script ());
61 g_debug ("Opening guest account with command '%s'", command);
62 g_autofree gchar *stdout_text = NULL;
63 gint exit_status;
64 g_autoptr(GError) error = NULL;
65 gboolean result = run_script (command, &stdout_text, &exit_status, &error);
66 if (error)
67 g_warning ("Error running guest account setup script '%s': %s", get_setup_script (), error->message);
68 if (!result)
69 return NULL;
70
71 if (exit_status != 0)
72 {
73 g_debug ("Guest account setup script returns %d: %s", exit_status, stdout_text);
74 return NULL;
75 }
76
77 /* Use the last line and trim whitespace */
78 g_auto(GStrv) lines = g_strsplit (g_strstrip (stdout_text), "\n", -1);
79 g_autofree gchar *username = NULL;
80 if (lines)
81 username = g_strdup (g_strstrip (lines[g_strv_length (lines) - 1]));
82 else
83 username = g_strdup ("");
84
85 if (strcmp (username, "") == 0)
86 {
87 g_debug ("Guest account setup script didn't return a username");
88 return NULL;
89 }
90
91 g_debug ("Guest account %s setup", username);
92
93 return g_steal_pointer (&username);
94 }
95
96 void
guest_account_cleanup(const gchar * username)97 guest_account_cleanup (const gchar *username)
98 {
99 g_autofree gchar *command = g_strdup_printf ("%s remove %s", get_setup_script (), username);
100 g_debug ("Closing guest account %s with command '%s'", username, command);
101
102 gint exit_status;
103 g_autoptr(GError) error = NULL;
104 gboolean result = run_script (command, NULL, &exit_status, &error);
105
106 if (error)
107 g_warning ("Error running guest account cleanup script '%s': %s", get_setup_script (), error->message);
108
109 if (result && exit_status != 0)
110 g_debug ("Guest account cleanup script returns %d", exit_status);
111 }
112