1/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2/* dbus-pipe.c pipe implementation (internal to D-Bus implementation)
3 *
4 * Copyright (C) 2002, 2003, 2006  Red Hat, Inc.
5 * Copyright (C) 2003 CodeFactory AB
6 *
7 * Licensed under the Academic Free License version 2.1
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
22 *
23 */
24
25#include <config.h>
26#include "dbus-pipe.h"
27
28/*
29 * init a pipe instance.
30 *
31 * @param pipe the pipe
32 * @param fd the file descriptor to init from
33 */
34void
35_dbus_pipe_init (DBusPipe *pipe,
36                 intptr_t  fd)
37{
38  pipe->fd_or_handle = fd;
39}
40
41/**
42 * init a pipe with stdout
43 *
44 * @param pipe the pipe
45 */
46void
47_dbus_pipe_init_stdout (DBusPipe *pipe)
48{
49  _dbus_pipe_init (pipe, 1);
50}
51
52/**
53 * check if a pipe is valid; pipes can be set invalid, similar to
54 * a -1 file descriptor.
55 *
56 * @param pipe the pipe instance
57 * @returns #FALSE if pipe is not valid
58 */
59dbus_bool_t
60_dbus_pipe_is_valid(DBusPipe *pipe)
61{
62  return pipe->fd_or_handle >= 0;
63}
64
65/**
66 * Check if a pipe is stdout or stderr.
67 *
68 * @param pipe the pipe instance
69 * @returns #TRUE if pipe is one of the standard out/err channels
70 */
71dbus_bool_t
72_dbus_pipe_is_stdout_or_stderr (DBusPipe *pipe)
73{
74  return pipe->fd_or_handle == 1 || pipe->fd_or_handle == 2;
75}
76
77/**
78 * Initializes a pipe to an invalid value.
79 * @param pipe the pipe
80 */
81void
82_dbus_pipe_invalidate (DBusPipe *pipe)
83{
84  pipe->fd_or_handle = -1;
85}
86