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.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
.highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */
.highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */
.highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */
.highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */
.highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */
.highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */
.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
.highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */
.highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */
.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */</style><div class="highlight"><pre><span></span><span class="cm">/* $Id$</span>
<span class="cm"> * $URL$</span>
<span class="cm"> *</span>
<span class="cm"> * Fifo plugin</span>
<span class="cm"> *</span>
<span class="cm"> * Copyright (C) 2008 Michael Vogt <michu@neophob.com></span>
<span class="cm"> * Copyright (C) 2010 Mattia Jona-Lasinio <mjona@users.sourceforge.net></span>
<span class="cm"> * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net></span>
<span class="cm"> *</span>
<span class="cm"> * This file is part of LCD4Linux.</span>
<span class="cm"> *</span>
<span class="cm"> * LCD4Linux is free software; you can redistribute it and/or modify</span>
<span class="cm"> * it under the terms of the GNU General Public License as published by</span>
<span class="cm"> * the Free Software Foundation; either version 2, or (at your option)</span>
<span class="cm"> * any later version.</span>
<span class="cm"> *</span>
<span class="cm"> * LCD4Linux is distributed in the hope that it will be useful,</span>
<span class="cm"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="cm"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<span class="cm"> * GNU General Public License for more details.</span>
<span class="cm"> *</span>
<span class="cm"> * You should have received a copy of the GNU General Public License</span>
<span class="cm"> * along with this program; if not, write to the Free Software</span>
<span class="cm"> * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.</span>
<span class="cm"> *</span>
<span class="cm"> */</span>
<span class="cm">/*</span>
<span class="cm"> * Configuration parameters:</span>
<span class="cm"> *</span>
<span class="cm"> * - FifoPath 'string' : use <string> as the fifo complete file path</span>
<span class="cm"> * If absent use /tmp/lcd4linux.fifo)</span>
<span class="cm"> *</span>
<span class="cm"> * - FifoBufSize num : if the plugin is unable to determine the display size then</span>
<span class="cm"> * set the size of the internal buffer to <num> characters</span>
<span class="cm"> * otherwise use the display size (number of columns).</span>
<span class="cm"> * If no display size is available and no FifoBufSize parameter</span>
<span class="cm"> * is specified then arbitrarily set the internal buffer size</span>
<span class="cm"> * to 80 characters.</span>
<span class="cm"> */</span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf">"config.h"</span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdlib.h></span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdio.h></span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf"><string.h></span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf"><errno.h></span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf"><unistd.h></span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf"><fcntl.h></span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf"><sys/stat.h></span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf"><signal.h></span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf">"debug.h"</span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf">"plugin.h"</span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf">"cfg.h"</span>
<span class="cp">#ifdef WITH_DMALLOC</span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf"><dmalloc.h></span>
<span class="cp">#endif</span>
<span class="cp">#define FIFO_MAXPATH 256</span>
<span class="cp">#define FIFO_DEFAULT_PATH /tmp/lcd4linux.fifo</span>
<span class="cp">#define FIFO_DEFAULT_BUFSIZE 80</span>
<span class="cp">#define str(s) #s</span>
<span class="cp">#define string(s) str(s)</span>
<span class="k">struct</span><span class="w"> </span><span class="nc">FifoData</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">path</span><span class="p">;</span>
<span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">msg</span><span class="p">;</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">msglen</span><span class="p">;</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">input</span><span class="p">;</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">created</span><span class="p">;</span>
<span class="p">};</span>
<span class="k">static</span><span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">FifoData</span><span class="w"> </span><span class="n">fd</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="p">.</span><span class="n">path</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">NULL</span><span class="p">,</span>
<span class="w"> </span><span class="p">.</span><span class="n">msg</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">NULL</span><span class="p">,</span>
<span class="w"> </span><span class="p">.</span><span class="n">msglen</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">-1</span><span class="p">,</span>
<span class="w"> </span><span class="p">.</span><span class="n">input</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">-1</span><span class="p">,</span>
<span class="w"> </span><span class="p">.</span><span class="n">created</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">-1</span><span class="p">,</span>
<span class="p">};</span>
<span class="k">static</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="nf">confFifo</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">FifoData</span><span class="w"> </span><span class="o">*</span><span class="n">p</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="o">*</span><span class="n">disp</span><span class="p">,</span><span class="w"> </span><span class="o">*</span><span class="n">sect</span><span class="p">,</span><span class="w"> </span><span class="o">*</span><span class="n">fifosect</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">"Plugin:FIFO"</span><span class="p">;</span>
<span class="w"> </span><span class="kt">unsigned</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">pathlen</span><span class="p">;</span>
<span class="w"> </span><span class="n">info</span><span class="p">(</span><span class="s">"[FIFO] Reading config file '%s'"</span><span class="p">,</span><span class="w"> </span><span class="n">cfg_source</span><span class="p">());</span>
<span class="w"> </span><span class="n">path</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">cfg_get</span><span class="p">(</span><span class="n">fifosect</span><span class="p">,</span><span class="w"> </span><span class="s">"FifoPath"</span><span class="p">,</span><span class="w"> </span><span class="n">string</span><span class="p">(</span><span class="n">FIFO_DEFAULT_PATH</span><span class="p">));</span>
<span class="w"> </span><span class="n">pathlen</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">strlen</span><span class="p">(</span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">pathlen</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">info</span><span class="p">(</span><span class="s">"[FIFO] Invalid '%s.FifoPath' entry from '%s'. "</span>
<span class="w"> </span><span class="s">"Assuming "</span><span class="w"> </span><span class="n">string</span><span class="p">(</span><span class="n">FIFO_DEFAULT_PATH</span><span class="p">),</span><span class="w"> </span><span class="n">fifosect</span><span class="p">,</span><span class="w"> </span><span class="n">cfg_source</span><span class="p">());</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="n">path</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">strdup</span><span class="p">(</span><span class="n">string</span><span class="p">(</span><span class="n">FIFO_DEFAULT_PATH</span><span class="p">));</span>
<span class="w"> </span><span class="n">pathlen</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">strlen</span><span class="p">(</span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">pathlen</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="n">FIFO_MAXPATH</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">error</span><span class="p">(</span><span class="s">"[FIFO] Error: Too long '%s.FifoPath' entry from '%s'. "</span>
<span class="w"> </span><span class="s">"(MAX "</span><span class="w"> </span><span class="n">string</span><span class="p">(</span><span class="n">FIFO_MAXPATH</span><span class="p">)</span><span class="w"> </span><span class="s">" chars)"</span><span class="p">,</span><span class="w"> </span><span class="n">fifosect</span><span class="p">,</span><span class="w"> </span><span class="n">cfg_source</span><span class="p">());</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">info</span><span class="p">(</span><span class="s">"[FIFO] Read '%s.FifoPath' value is '%s'"</span><span class="p">,</span><span class="w"> </span><span class="n">fifosect</span><span class="p">,</span><span class="w"> </span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="n">disp</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">cfg_get</span><span class="p">(</span><span class="nb">NULL</span><span class="p">,</span><span class="w"> </span><span class="s">"Display"</span><span class="p">,</span><span class="w"> </span><span class="nb">NULL</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">disp</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="nb">NULL</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">error</span><span class="p">(</span><span class="s">"[FIFO] Error: Could not get the Display name from '%s'"</span><span class="p">,</span><span class="w"> </span><span class="n">cfg_source</span><span class="p">());</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">((</span><span class="n">sect</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">malloc</span><span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">strlen</span><span class="p">(</span><span class="s">"Display:"</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">strlen</span><span class="p">(</span><span class="n">disp</span><span class="p">)))</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="nb">NULL</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">error</span><span class="p">(</span><span class="s">"[FIFO] Error: Memory allocation failed"</span><span class="p">);</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">disp</span><span class="p">);</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">strcpy</span><span class="p">(</span><span class="n">sect</span><span class="p">,</span><span class="w"> </span><span class="s">"Display:"</span><span class="p">);</span>
<span class="w"> </span><span class="n">strcat</span><span class="p">(</span><span class="n">sect</span><span class="p">,</span><span class="w"> </span><span class="n">disp</span><span class="p">);</span>
<span class="w"> </span><span class="n">info</span><span class="p">(</span><span class="s">"[FIFO] Using display '%s'."</span><span class="p">,</span><span class="w"> </span><span class="n">disp</span><span class="p">);</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">disp</span><span class="p">);</span>
<span class="w"> </span><span class="n">disp</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">cfg_get</span><span class="p">(</span><span class="n">sect</span><span class="p">,</span><span class="w"> </span><span class="s">"Size"</span><span class="p">,</span><span class="w"> </span><span class="nb">NULL</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">disp</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="nb">NULL</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">info</span><span class="p">(</span><span class="s">"[FIFO] Getting the buffer size from '%s.Size'"</span><span class="p">,</span><span class="w"> </span><span class="n">sect</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">sscanf</span><span class="p">(</span><span class="n">disp</span><span class="p">,</span><span class="w"> </span><span class="s">"%dx%*d"</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">p</span><span class="o">-></span><span class="n">msglen</span><span class="p">)</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">info</span><span class="p">(</span><span class="s">"[FIFO] Could not determine the display size. "</span><span class="w"> </span><span class="s">"Assuming "</span><span class="w"> </span><span class="n">string</span><span class="p">(</span><span class="n">FIFO_DEFAULT_BUFSIZE</span><span class="p">));</span>
<span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msglen</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">FIFO_DEFAULT_BUFSIZE</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">disp</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="k">else</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">info</span><span class="p">(</span><span class="s">"[FIFO] Could not find a '%s.Size' entry."</span><span class="p">,</span><span class="w"> </span><span class="n">sect</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">cfg_number</span><span class="p">(</span><span class="n">fifosect</span><span class="p">,</span><span class="w"> </span><span class="s">"FifoBufSize"</span><span class="p">,</span><span class="w"> </span><span class="n">FIFO_DEFAULT_BUFSIZE</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">-1</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">p</span><span class="o">-></span><span class="n">msglen</span><span class="p">)</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">info</span><span class="p">(</span><span class="s">"[FIFO] Getting the buffer size from '%s.FifoBufSize'"</span><span class="p">,</span><span class="w"> </span><span class="n">fifosect</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="k">else</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">info</span><span class="p">(</span><span class="s">"[FIFO] Could not find a valid '%s.FifoBufSize' entry. "</span>
<span class="w"> </span><span class="s">"Assuming "</span><span class="w"> </span><span class="n">string</span><span class="p">(</span><span class="n">FIFO_DEFAULT_BUFSIZE</span><span class="p">),</span><span class="w"> </span><span class="n">fifosect</span><span class="p">);</span>
<span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msglen</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">FIFO_DEFAULT_BUFSIZE</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">info</span><span class="p">(</span><span class="s">"[FIFO] Read buffer size is '%d'"</span><span class="p">,</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msglen</span><span class="p">);</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">sect</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">((</span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">malloc</span><span class="p">(</span><span class="mi">2</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">pathlen</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msglen</span><span class="p">))</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="nb">NULL</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">error</span><span class="p">(</span><span class="s">"[FIFO] Error: Memory allocation failed"</span><span class="p">);</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
<span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msglen</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
<span class="w"> </span><span class="n">strcpy</span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">0</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">static</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="nf">makeFifo</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">FifoData</span><span class="w"> </span><span class="o">*</span><span class="n">p</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">stat</span><span class="w"> </span><span class="n">st</span><span class="p">;</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">stat</span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">st</span><span class="p">)</span><span class="w"> </span><span class="o"><</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">errno</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">ENOENT</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">mkfifo</span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="mo">0666</span><span class="p">)</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">created</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">0</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">error</span><span class="p">(</span><span class="s">"Couldn't create FIFO </span><span class="se">\"</span><span class="s">%s</span><span class="se">\"</span><span class="s">: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">strerror</span><span class="p">(</span><span class="n">errno</span><span class="p">));</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">error</span><span class="p">(</span><span class="s">"Failed to stat FIFO </span><span class="se">\"</span><span class="s">%s</span><span class="se">\"</span><span class="s">: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">strerror</span><span class="p">(</span><span class="n">errno</span><span class="p">));</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">S_ISFIFO</span><span class="p">(</span><span class="n">st</span><span class="p">.</span><span class="n">st_mode</span><span class="p">))</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">error</span><span class="p">(</span><span class="s">"</span><span class="se">\"</span><span class="s">%s</span><span class="se">\"</span><span class="s"> already exists, but is not a FIFO"</span><span class="p">,</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">0</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">closeFifo</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">FifoData</span><span class="w"> </span><span class="o">*</span><span class="n">p</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">stat</span><span class="w"> </span><span class="n">st</span><span class="p">;</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">input</span><span class="w"> </span><span class="o">>=</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">close</span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">input</span><span class="p">);</span>
<span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">input</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">-1</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">((</span><span class="n">p</span><span class="o">-></span><span class="n">created</span><span class="w"> </span><span class="o">>=</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">&&</span><span class="w"> </span><span class="p">(</span><span class="n">stat</span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">st</span><span class="p">)</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">0</span><span class="p">))</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">debug</span><span class="p">(</span><span class="s">"Removing FIFO </span><span class="se">\"</span><span class="s">%s</span><span class="se">\"\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">unlink</span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">)</span><span class="w"> </span><span class="o"><</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">error</span><span class="p">(</span><span class="s">"Could not remove FIFO </span><span class="se">\"</span><span class="s">%s</span><span class="se">\"</span><span class="s">: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">strerror</span><span class="p">(</span><span class="n">errno</span><span class="p">));</span>
<span class="w"> </span><span class="k">return</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">created</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">-1</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="p">);</span>
<span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">NULL</span><span class="p">;</span>
<span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msglen</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">-1</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
<span class="k">static</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="nf">openFifo</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">FifoData</span><span class="w"> </span><span class="o">*</span><span class="n">p</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">created</span><span class="w"> </span><span class="o"><</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">error</span><span class="p">(</span><span class="s">"Error: FIFO </span><span class="se">\"</span><span class="s">%s</span><span class="se">\"</span><span class="s"> does not exist: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">strerror</span><span class="p">(</span><span class="n">errno</span><span class="p">));</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">((</span><span class="n">p</span><span class="o">-></span><span class="n">input</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">open</span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">O_RDONLY</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">O_NONBLOCK</span><span class="p">))</span><span class="w"> </span><span class="o"><</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">error</span><span class="p">(</span><span class="s">"Could not open FIFO </span><span class="se">\"</span><span class="s">%s</span><span class="se">\"</span><span class="s"> for reading: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">strerror</span><span class="p">(</span><span class="n">errno</span><span class="p">));</span>
<span class="w"> </span><span class="n">closeFifo</span><span class="p">(</span><span class="n">p</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">0</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">static</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="nf">startFifo</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">FifoData</span><span class="w"> </span><span class="o">*</span><span class="n">p</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">res</span><span class="p">;</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">((</span><span class="n">res</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">confFifo</span><span class="p">(</span><span class="n">p</span><span class="p">)))</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="n">res</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">((</span><span class="n">res</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">makeFifo</span><span class="p">(</span><span class="n">p</span><span class="p">)))</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="n">res</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">((</span><span class="n">res</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">openFifo</span><span class="p">(</span><span class="n">p</span><span class="p">)))</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="n">res</span><span class="p">);</span>
<span class="w"> </span><span class="cm">/* ignore broken pipe */</span>
<span class="w"> </span><span class="n">signal</span><span class="p">(</span><span class="n">SIGPIPE</span><span class="p">,</span><span class="w"> </span><span class="n">SIG_IGN</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="n">res</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">readFifo</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">FifoData</span><span class="w"> </span><span class="o">*</span><span class="n">p</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">bytes</span><span class="p">;</span>
<span class="w"> </span><span class="n">bytes</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">read</span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">input</span><span class="p">,</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="p">,</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msglen</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">bytes</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span>
<span class="w"> </span><span class="k">return</span><span class="p">;</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">bytes</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="p">[</span><span class="n">bytes</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
<span class="w"> </span><span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="n">bytes</span><span class="o">--</span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="p">[</span><span class="n">bytes</span><span class="p">]</span><span class="w"> </span><span class="o"><</span><span class="w"> </span><span class="mh">0x20</span><span class="p">)</span>
<span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="p">[</span><span class="n">bytes</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="sc">' '</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="k">else</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">error</span><span class="p">(</span><span class="s">"[FIFO] Error %i: %s"</span><span class="p">,</span><span class="w"> </span><span class="n">errno</span><span class="p">,</span><span class="w"> </span><span class="n">strerror</span><span class="p">(</span><span class="n">errno</span><span class="p">));</span>
<span class="w"> </span><span class="n">strcpy</span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="p">,</span><span class="w"> </span><span class="s">"ERROR"</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
<span class="k">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">runFifo</span><span class="p">(</span><span class="n">RESULT</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">result</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="k">static</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">state</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
<span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">FifoData</span><span class="w"> </span><span class="o">*</span><span class="n">p</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">&</span><span class="n">fd</span><span class="p">;</span>
<span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">s</span><span class="p">;</span>
<span class="w"> </span><span class="k">switch</span><span class="w"> </span><span class="p">(</span><span class="n">state</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">case</span><span class="w"> </span><span class="mi">1</span><span class="p">:</span>
<span class="w"> </span><span class="cm">/* Called for the first time. Set up everything. */</span>
<span class="w"> </span><span class="n">state</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">startFifo</span><span class="p">(</span><span class="n">p</span><span class="p">);</span>
<span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">""</span><span class="p">;</span>
<span class="w"> </span><span class="k">break</span><span class="p">;</span>
<span class="w"> </span><span class="k">case</span><span class="w"> </span><span class="mi">0</span><span class="p">:</span>
<span class="w"> </span><span class="cm">/* Init went fine. Now run in normal operation mode. */</span>
<span class="w"> </span><span class="n">readFifo</span><span class="p">(</span><span class="n">p</span><span class="p">);</span>
<span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">p</span><span class="o">-></span><span class="n">msg</span><span class="p">;</span>
<span class="w"> </span><span class="k">break</span><span class="p">;</span>
<span class="w"> </span><span class="k">default</span><span class="o">:</span>
<span class="w"> </span><span class="cm">/* There was an error somewhere in init. Do nothing. */</span>
<span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">"ERROR"</span><span class="p">;</span>
<span class="w"> </span><span class="k">break</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/* Store the result */</span>
<span class="w"> </span><span class="n">SetResult</span><span class="p">(</span><span class="o">&</span><span class="n">result</span><span class="p">,</span><span class="w"> </span><span class="n">R_STRING</span><span class="p">,</span><span class="w"> </span><span class="n">s</span><span class="p">);</span>
<span class="p">}</span>
<span class="cm">/* plugin initialization */</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">plugin_init_fifo</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="n">AddFunction</span><span class="p">(</span><span class="s">"fifo::read"</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="n">runFifo</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="mi">0</span><span class="p">);</span>
<span class="p">}</span>
<span class="kt">void</span><span class="w"> </span><span class="nf">plugin_exit_fifo</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="n">closeFifo</span><span class="p">(</span><span class="o">&</span><span class="n">fd</span><span class="p">);</span>
<span class="p">}</span>
</pre></div>