LCOV - code coverage report
Current view: top level - glib/gio/tests - test-pipe-unix.c (source / functions) Hit Total Coverage
Test: unnamed Lines: 27 34 79.4 %
Date: 2024-04-23 05:16:05 Functions: 2 2 100.0 %
Branches: 7 14 50.0 %

           Branch data     Line data    Source code
       1                 :            : /* Unix pipe-to-self. This is a utility module for tests, not a test.
       2                 :            :  *
       3                 :            :  * Copyright © 2008-2010 Red Hat, Inc.
       4                 :            :  * Copyright © 2011 Nokia Corporation
       5                 :            :  *
       6                 :            :  * SPDX-License-Identifier: LGPL-2.1-or-later
       7                 :            :  *
       8                 :            :  * This library is free software; you can redistribute it and/or
       9                 :            :  * modify it under the terms of the GNU Lesser General Public
      10                 :            :  * License as published by the Free Software Foundation; either
      11                 :            :  * version 2.1 of the License, or (at your option) any later version.
      12                 :            :  *
      13                 :            :  * This library is distributed in the hope that it will be useful,
      14                 :            :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15                 :            :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16                 :            :  * Lesser General Public License for more details.
      17                 :            :  *
      18                 :            :  * You should have received a copy of the GNU Lesser General
      19                 :            :  * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
      20                 :            :  *
      21                 :            :  * Author: Simon McVittie <simon.mcvittie@collabora.co.uk>
      22                 :            :  */
      23                 :            : 
      24                 :            : #include <errno.h>
      25                 :            : #include <unistd.h>
      26                 :            : 
      27                 :            : #include <gio/gio.h>
      28                 :            : 
      29                 :            : #include "test-io-stream.h"
      30                 :            : #include "test-pipe-unix.h"
      31                 :            : 
      32                 :            : #ifdef G_OS_UNIX
      33                 :            : #   include <gio/gunixinputstream.h>
      34                 :            : #   include <gio/gunixoutputstream.h>
      35                 :            : #else
      36                 :            : #   error This module only exists on Unix
      37                 :            : #endif
      38                 :            : 
      39                 :            : /**
      40                 :            :  * test_pipe:
      41                 :            :  * @is: (out) (optional): used to return a #GInputStream
      42                 :            :  * @os: (out) (optional): used to return a #GOutputStream
      43                 :            :  * @error: used to raise an error
      44                 :            :  *
      45                 :            :  * Return a "pipe to self" connecting @is to @os. This can be used
      46                 :            :  * as a unidirectional pipe to or from a child process, for instance.
      47                 :            :  *
      48                 :            :  * See test_bidi_pipe() if you want to emulate a bidirectional pipe
      49                 :            :  * via a pair of unidirectional pipes.
      50                 :            :  *
      51                 :            :  * Returns: %TRUE on success
      52                 :            :  */
      53                 :            : gboolean
      54                 :          6 : test_pipe (GInputStream  **is,
      55                 :            :            GOutputStream **os,
      56                 :            :            GError        **error)
      57                 :            : {
      58                 :            :   int pipefd[2];
      59                 :            :   int ret;
      60                 :            : 
      61                 :          6 :   ret = pipe (pipefd);
      62                 :            : 
      63         [ -  + ]:          6 :   if (ret != 0)
      64                 :            :     {
      65                 :          0 :       int e = errno;
      66                 :            : 
      67                 :          0 :       g_set_error (error, G_IO_ERROR, g_io_error_from_errno (e),
      68                 :            :                    "%s", g_strerror (e));
      69                 :          0 :       return FALSE;
      70                 :            :     }
      71                 :            : 
      72         [ +  - ]:          6 :   if (is != NULL)
      73                 :          6 :     *is = g_unix_input_stream_new (pipefd[0], TRUE);
      74                 :            :   else
      75                 :          0 :     close (pipefd[0]);
      76                 :            : 
      77         [ +  - ]:          6 :   if (os != NULL)
      78                 :          6 :     *os = g_unix_output_stream_new (pipefd[1], TRUE);
      79                 :            :   else
      80                 :          0 :     close (pipefd[1]);
      81                 :            : 
      82                 :          6 :   return TRUE;
      83                 :            : }
      84                 :            : 
      85                 :            : /**
      86                 :            :  * test_bidi_pipe:
      87                 :            :  * @left: (out) (optional): used to return one #GIOStream
      88                 :            :  * @right: (out) (optional): used to return the other #GIOStream
      89                 :            :  * @error: used to raise an error
      90                 :            :  *
      91                 :            :  * Return two #GIOStreams connected to each other with pipes.
      92                 :            :  * The "left" input stream is connected by a unidirectional pipe
      93                 :            :  * to the "right" output stream, and vice versa. This can be used
      94                 :            :  * as a bidirectional pipe to a child process, for instance.
      95                 :            :  *
      96                 :            :  * See test_pipe() if you only need a one-way pipe.
      97                 :            :  *
      98                 :            :  * Returns: %TRUE on success
      99                 :            :  */
     100                 :            : gboolean
     101                 :          1 : test_bidi_pipe (GIOStream **left,
     102                 :            :                 GIOStream **right,
     103                 :            :                 GError    **error)
     104                 :            : {
     105                 :          1 :   GInputStream *left_in = NULL;
     106                 :          1 :   GOutputStream *left_out = NULL;
     107                 :          1 :   GInputStream *right_in = NULL;
     108                 :          1 :   GOutputStream *right_out = NULL;
     109                 :          1 :   gboolean ret = FALSE;
     110                 :            : 
     111         [ -  + ]:          1 :   if (!test_pipe (&left_in, &right_out, error))
     112                 :          0 :     goto out;
     113                 :            : 
     114         [ -  + ]:          1 :   if (!test_pipe (&right_in, &left_out, error))
     115                 :          0 :     goto out;
     116                 :            : 
     117         [ +  - ]:          1 :   if (left != NULL)
     118                 :          1 :     *left = test_io_stream_new (left_in, left_out);
     119                 :            : 
     120         [ +  - ]:          1 :   if (right != NULL)
     121                 :          1 :     *right = test_io_stream_new (right_in, right_out);
     122                 :            : 
     123                 :          1 :   ret = TRUE;
     124                 :            : 
     125                 :          1 : out:
     126                 :          1 :   g_clear_object (&left_in);
     127                 :          1 :   g_clear_object (&left_out);
     128                 :          1 :   g_clear_object (&right_in);
     129                 :          1 :   g_clear_object (&right_out);
     130                 :          1 :   return ret;
     131                 :            : }

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