ve had a few additions from upstream.</title>
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<tr><td class='sub'>Web front-end for git that you're looking at right now. Might have had a few additions from upstream.</td><td class='sub right'></td></tr></table>
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</pre></td>
<td class='lines'><pre><code><style>pre { line-height: 125%; }
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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */</style><div class="highlight"><pre><span></span><span class="cm">/* cache.c: cache management</span>
<span class="cm"> *</span>
<span class="cm"> * Copyright (C) 2006 Lars Hjemli</span>
<span class="cm"> *</span>
<span class="cm"> * Licensed under GNU General Public License v2</span>
<span class="cm"> * (see COPYING for full license text)</span>
<span class="cm"> */</span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf">"cgit.h"</span>
<span class="k">const</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">NOLOCK</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">-1</span><span class="p">;</span>
<span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="nf">cache_safe_filename</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">unsafe</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">char</span><span class="w"> </span><span class="n">buf</span><span class="p">[</span><span class="mi">4</span><span class="p">][</span><span class="n">PATH_MAX</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">bufidx</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="kt">char</span><span class="w"> </span><span class="n">c</span><span class="p">;</span>
<span class="w"> </span><span class="n">bufidx</span><span class="o">++</span><span class="p">;</span>
<span class="w"> </span><span class="n">bufidx</span><span class="w"> </span><span class="o">&=</span><span class="w"> </span><span class="mi">3</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">buf</span><span class="p">[</span><span class="n">bufidx</span><span class="p">];</span>
<span class="w"> </span><span class="k">while</span><span class="p">(</span><span class="n">unsafe</span><span class="w"> </span><span class="o">&&</span><span class="w"> </span><span class="p">(</span><span class="n">c</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">*</span><span class="n">unsafe</span><span class="o">++</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">c</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="sc">'/'</span><span class="w"> </span><span class="o">||</span><span class="w"> </span><span class="n">c</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="sc">' '</span><span class="w"> </span><span class="o">||</span><span class="w"> </span><span class="n">c</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="sc">'&'</span><span class="w"> </span><span class="o">||</span><span class="w"> </span><span class="n">c</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="sc">'|'</span><span class="w"> </span><span class="o">||</span>
<span class="w"> </span><span class="n">c</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="sc">'>'</span><span class="w"> </span><span class="o">||</span><span class="w"> </span><span class="n">c</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="sc">'<'</span><span class="w"> </span><span class="o">||</span><span class="w"> </span><span class="n">c</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="n">c</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="o">*</span><span class="n">s</span><span class="o">++</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">c</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="o">*</span><span class="n">s</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="sc">'\0'</span><span class="p">;</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">buf</span><span class="p">[</span><span class="n">bufidx</span><span class="p">];</span>
<span class="p">}</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">cache_exist</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">cacheitem</span><span class="w"> </span><span class="o">*</span><span class="n">item</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">stat</span><span class="p">(</span><span class="n">item</span><span class="o">-></span><span class="n">name</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">item</span><span class="o">-></span><span class="n">st</span><span class="p">))</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">item</span><span class="o">-></span><span class="n">st</span><span class="p">.</span><span class="n">st_mtime</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="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">return</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
<span class="p">}</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">cache_create_dirs</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="n">path</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">fmt</span><span class="p">(</span><span class="s">"%s"</span><span class="p">,</span><span class="w"> </span><span class="n">cgit_cache_root</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">mkdir</span><span class="p">(</span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">S_IRWXU</span><span class="p">)</span><span class="w"> </span><span class="o">&&</span><span class="w"> </span><span class="n">errno</span><span class="o">!=</span><span class="n">EEXIST</span><span class="p">)</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</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">cgit_repo</span><span class="p">)</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</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">fmt</span><span class="p">(</span><span class="s">"%s/%s"</span><span class="p">,</span><span class="w"> </span><span class="n">cgit_cache_root</span><span class="p">,</span>
<span class="w"> </span><span class="n">cache_safe_filename</span><span class="p">(</span><span class="n">cgit_repo</span><span class="o">-></span><span class="n">url</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">mkdir</span><span class="p">(</span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">S_IRWXU</span><span class="p">)</span><span class="w"> </span><span class="o">&&</span><span class="w"> </span><span class="n">errno</span><span class="o">!=</span><span class="n">EEXIST</span><span class="p">)</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</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">cgit_query_page</span><span class="p">)</span><span class="w"> </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">fmt</span><span class="p">(</span><span class="s">"%s/%s/%s"</span><span class="p">,</span><span class="w"> </span><span class="n">cgit_cache_root</span><span class="p">,</span>
<span class="w"> </span><span class="n">cache_safe_filename</span><span class="p">(</span><span class="n">cgit_repo</span><span class="o">-></span><span class="n">url</span><span class="p">),</span>
<span class="w"> </span><span class="n">cgit_query_page</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">mkdir</span><span class="p">(</span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">S_IRWXU</span><span class="p">)</span><span class="w"> </span><span class="o">&&</span><span class="w"> </span><span class="n">errno</span><span class="o">!=</span><span class="n">EEXIST</span><span class="p">)</span>
<span class="w"> </span><span class="k">return</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">return</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
<span class="p">}</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">cache_refill_overdue</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">lockfile</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">lockfile</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="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
<span class="w"> </span><span class="k">else</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">(</span><span class="n">time</span><span class="p">(</span><span class="nb">NULL</span><span class="p">)</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="n">st</span><span class="p">.</span><span class="n">st_mtime</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="n">cgit_cache_max_create_time</span><span class="p">);</span>
<span class="p">}</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">cache_lock</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">cacheitem</span><span class="w"> </span><span class="o">*</span><span class="n">item</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">i</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="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">lockfile</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">xstrdup</span><span class="p">(</span><span class="n">fmt</span><span class="p">(</span><span class="s">"%s.lock"</span><span class="p">,</span><span class="w"> </span><span class="n">item</span><span class="o">-></span><span class="n">name</span><span class="p">));</span>
<span class="w"> </span><span class="nl">top</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">i</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="n">cgit_max_lock_attempts</span><span class="p">)</span>
<span class="w"> </span><span class="n">die</span><span class="p">(</span><span class="s">"cache_lock: unable to lock %s: %s"</span><span class="p">,</span>
<span class="w"> </span><span class="n">item</span><span class="o">-></span><span class="n">name</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">item</span><span class="o">-></span><span class="n">fd</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">lockfile</span><span class="p">,</span><span class="w"> </span><span class="n">O_WRONLY</span><span class="o">|</span><span class="n">O_CREAT</span><span class="o">|</span><span class="n">O_EXCL</span><span class="p">,</span><span class="w"> </span><span class="n">S_IRUSR</span><span class="o">|</span><span class="n">S_IWUSR</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">item</span><span class="o">-></span><span class="n">fd</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">NOLOCK</span><span class="w"> </span><span class="o">&&</span><span class="w"> </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="w"> </span><span class="o">&&</span><span class="w"> </span><span class="n">cache_create_dirs</span><span class="p">())</span>
<span class="w"> </span><span class="k">goto</span><span class="w"> </span><span class="n">top</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">item</span><span class="o">-></span><span class="n">fd</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">NOLOCK</span><span class="w"> </span><span class="o">&&</span><span class="w"> </span><span class="n">errno</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">EEXIST</span><span class="w"> </span><span class="o">&&</span>
<span class="w"> </span><span class="n">cache_refill_overdue</span><span class="p">(</span><span class="n">lockfile</span><span class="p">)</span><span class="w"> </span><span class="o">&&</span><span class="w"> </span><span class="o">!</span><span class="n">unlink</span><span class="p">(</span><span class="n">lockfile</span><span class="p">))</span>
<span class="w"> </span><span class="k">goto</span><span class="w"> </span><span class="n">top</span><span class="p">;</span>
<span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">lockfile</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">item</span><span class="o">-></span><span class="n">fd</span><span class="w"> </span><span class="o">></span><span class="w"> </span><span class="mi">0</span><span class="p">);</span>
<span class="p">}</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">cache_unlock</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">cacheitem</span><span class="w"> </span><span class="o">*</span><span class="n">item</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="n">close</span><span class="p">(</span><span class="n">item</span><span class="o">-></span><span class="n">fd</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">rename</span><span class="p">(</span><span class="n">fmt</span><span class="p">(</span><span class="s">"%s.lock"</span><span class="p">,</span><span class="w"> </span><span class="n">item</span><span class="o">-></span><span class="n">name</span><span class="p">),</span><span class="w"> </span><span class="n">item</span><span class="o">-></span><span class="n">name</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="p">}</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">cache_cancel_lock</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">cacheitem</span><span class="w"> </span><span class="o">*</span><span class="n">item</span><span class="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">unlink</span><span class="p">(</span><span class="n">fmt</span><span class="p">(</span><span class="s">"%s.lock"</span><span class="p">,</span><span class="w"> </span><span class="n">item</span><span class="o">-></span><span class="n">name</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="p">}</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">cache_expired</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">cacheitem</span><span class="w"> </span><span class="o">*</span><span class="n">item</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">item</span><span class="o">-></span><span class="n">ttl</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="w"> </span><span class="mi">0</span><span class="p">;</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">item</span><span class="o">-></span><span class="n">st</span><span class="p">.</span><span class="n">st_mtime</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">item</span><span class="o">-></span><span class="n">ttl</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="mi">60</span><span class="w"> </span><span class="o"><</span><span class="w"> </span><span class="n">time</span><span class="p">(</span><span class="nb">NULL</span><span class="p">);</span>
<span class="p">}</span>
</pre></div>