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 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 */ 46 void 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 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 */ 71 dbus_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 */ 81 void 82 _dbus_pipe_invalidate (DBusPipe *pipe) 83 { 84 pipe->fd_or_handle = -1; 85 } 86
