dcf64ca167
This uses David Herrmann's new logind sessions interface to retrieve fds for input devices, rather than using a custom setuid helper to do the management. This vastly simplifies the interface. This requires systemd v210, at least. https://bugzilla.gnome.org/show_bug.cgi?id=724604
107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/*
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* Copyright (C) 2014 Red Hat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Written by:
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* Jasper St. Pierre <jstpierre@mecheye.net>
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*/
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#include "config.h"
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#include "dbus-utils.h"
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#include <glib.h>
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/* Stolen from tp_escape_as_identifier, from tp-glib,
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* which follows the same escaping convention as systemd.
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*/
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static inline gboolean
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_esc_ident_bad (gchar c, gboolean is_first)
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{
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return ((c < 'a' || c > 'z') &&
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(c < 'A' || c > 'Z') &&
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(c < '0' || c > '9' || is_first));
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}
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static gchar *
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escape_dbus_component (const gchar *name)
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{
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gboolean bad = FALSE;
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size_t len = 0;
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GString *op;
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const gchar *ptr, *first_ok;
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g_return_val_if_fail (name != NULL, NULL);
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/* fast path for empty name */
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if (name[0] == '\0')
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return g_strdup ("_");
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for (ptr = name; *ptr; ptr++)
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{
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if (_esc_ident_bad (*ptr, ptr == name))
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{
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bad = TRUE;
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len += 3;
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}
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else
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len++;
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}
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/* fast path if it's clean */
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if (!bad)
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return g_strdup (name);
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/* If strictly less than ptr, first_ok is the first uncopied safe character.
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*/
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first_ok = name;
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op = g_string_sized_new (len);
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for (ptr = name; *ptr; ptr++)
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{
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if (_esc_ident_bad (*ptr, ptr == name))
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{
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/* copy preceding safe characters if any */
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if (first_ok < ptr)
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{
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g_string_append_len (op, first_ok, ptr - first_ok);
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}
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/* escape the unsafe character */
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g_string_append_printf (op, "_%02x", (unsigned char)(*ptr));
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/* restart after it */
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first_ok = ptr + 1;
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}
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}
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/* copy trailing safe characters if any */
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if (first_ok < ptr)
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{
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g_string_append_len (op, first_ok, ptr - first_ok);
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}
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return g_string_free (op, FALSE);
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}
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char *
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get_escaped_dbus_path (const char *prefix,
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const char *component)
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{
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char *escaped_component = escape_dbus_component (component);
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char *path = g_strconcat (prefix, "/", escaped_component, NULL);
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g_free (escaped_component);
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return path;
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}
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