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 */
34 void
_dbus_pipe_init(DBusPipe * pipe,int fd)35 _dbus_pipe_init (DBusPipe *pipe,
36 int fd)
37 {
38 pipe->fd = fd;
39 }
40
41 /**
42 * init a pipe with stdout
43 *
44 * @param pipe the pipe
45 */
46 void
_dbus_pipe_init_stdout(DBusPipe * pipe)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 */
59 dbus_bool_t
_dbus_pipe_is_valid(DBusPipe * pipe)60 _dbus_pipe_is_valid(DBusPipe *pipe)
61 {
62 return pipe->fd >= 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 */
71 dbus_bool_t
_dbus_pipe_is_stdout_or_stderr(DBusPipe * pipe)72 _dbus_pipe_is_stdout_or_stderr (DBusPipe *pipe)
73 {
74 return pipe->fd == 1 || pipe->fd == 2;
75 }
76
77 /**
78 * Initializes a pipe to an invalid value.
79 * @param pipe the pipe
80 */
81 void
_dbus_pipe_invalidate(DBusPipe * pipe)82 _dbus_pipe_invalidate (DBusPipe *pipe)
83 {
84 pipe->fd = -1;
85 }
86