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130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
/* Unix pipe-to-self. This is a utility module for tests, not a test.
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*
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* Copyright © 2008-2010 Red Hat, Inc.
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* Copyright © 2011 Nokia Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Simon McVittie <simon.mcvittie@collabora.co.uk>
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <gio/gio.h>
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#include "test-io-stream.h"
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#include "test-pipe-unix.h"
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#ifdef G_OS_UNIX
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# include <gio/gunixinputstream.h>
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# include <gio/gunixoutputstream.h>
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#else
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# error This module only exists on Unix
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#endif
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/**
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* test_pipe:
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* @is: (out) (allow-none): used to return a #GInputStream
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* @os: (out) (allow-none): used to return a #GOutputStream
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* @error: used to raise an error
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*
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* Return a "pipe to self" connecting @is to @os. This can be used
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* as a unidirectional pipe to or from a child process, for instance.
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*
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* See test_bidi_pipe() if you want to emulate a bidirectional pipe
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* via a pair of unidirectional pipes.
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*
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* Returns: %TRUE on success
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*/
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gboolean
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test_pipe (GInputStream **is,
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GOutputStream **os,
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GError **error)
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{
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int pipefd[2];
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int ret;
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ret = pipe (pipefd);
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if (ret != 0)
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{
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int e = errno;
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g_set_error (error, G_IO_ERROR, g_io_error_from_errno (e),
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"%s", g_strerror (e));
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return FALSE;
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}
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if (is != NULL)
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*is = g_unix_input_stream_new (pipefd[0], TRUE);
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else
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close (pipefd[0]);
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if (os != NULL)
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*os = g_unix_output_stream_new (pipefd[1], TRUE);
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else
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close (pipefd[1]);
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return TRUE;
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}
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/**
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* test_bidi_pipe:
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* @left: (out) (allow-none): used to return one #GIOStream
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* @right: (out) (allow-none): used to return the other #GIOStream
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* @error: used to raise an error
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*
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* Return two #GIOStream<!---->s connected to each other with pipes.
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* The "left" input stream is connected by a unidirectional pipe
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* to the "right" output stream, and vice versa. This can be used
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* as a bidirectional pipe to a child process, for instance.
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*
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* See test_pipe() if you only need a one-way pipe.
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*
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* Returns: %TRUE on success
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*/
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gboolean
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test_bidi_pipe (GIOStream **left,
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GIOStream **right,
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GError **error)
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{
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GInputStream *left_in = NULL;
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GOutputStream *left_out = NULL;
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GInputStream *right_in = NULL;
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GOutputStream *right_out = NULL;
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gboolean ret = FALSE;
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if (!test_pipe (&left_in, &right_out, error))
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goto out;
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if (!test_pipe (&right_in, &left_out, error))
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goto out;
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if (left != NULL)
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*left = test_io_stream_new (left_in, left_out);
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if (right != NULL)
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*right = test_io_stream_new (right_in, right_out);
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ret = TRUE;
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out:
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g_clear_object (&left_in);
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g_clear_object (&left_out);
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g_clear_object (&right_in);
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g_clear_object (&right_out);
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return ret;
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}
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