1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright (C) 2014 Red Hat
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Written by:
* Jasper St. Pierre <jstpierre@mecheye.net>
*/
#include "config.h"
#include "backends/native/dbus-utils.h"
#include <glib.h>
/* Stolen from tp_escape_as_identifier, from tp-glib,
* which follows the same escaping convention as systemd.
*/
static inline gboolean
_esc_ident_bad (gchar c, gboolean is_first)
{
return ((c < 'a' || c > 'z') &&
(c < 'A' || c > 'Z') &&
(c < '0' || c > '9' || is_first));
}
static gchar *
escape_dbus_component (const gchar *name)
{
gboolean bad = FALSE;
size_t len = 0;
GString *op;
const gchar *ptr, *first_ok;
g_return_val_if_fail (name != NULL, NULL);
/* fast path for empty name */
if (name[0] == '\0')
return g_strdup ("_");
for (ptr = name; *ptr; ptr++)
{
if (_esc_ident_bad (*ptr, ptr == name))
{
bad = TRUE;
len += 3;
}
else
len++;
}
/* fast path if it's clean */
if (!bad)
return g_strdup (name);
/* If strictly less than ptr, first_ok is the first uncopied safe character.
*/
first_ok = name;
op = g_string_sized_new (len);
for (ptr = name; *ptr; ptr++)
{
if (_esc_ident_bad (*ptr, ptr == name))
{
/* copy preceding safe characters if any */
if (first_ok < ptr)
{
g_string_append_len (op, first_ok, ptr - first_ok);
}
/* escape the unsafe character */
g_string_append_printf (op, "_%02x", (unsigned char)(*ptr));
/* restart after it */
first_ok = ptr + 1;
}
}
/* copy trailing safe characters if any */
if (first_ok < ptr)
{
g_string_append_len (op, first_ok, ptr - first_ok);
}
return g_string_free (op, FALSE);
}
char *
get_escaped_dbus_path (const char *prefix,
const char *component)
{
char *escaped_component = escape_dbus_component (component);
char *path = g_strconcat (prefix, "/", escaped_component, NULL);
g_free (escaped_component);
return path;
}
|
