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ex_hello_8c-example.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>WiredTiger: ex_hello.c</title>
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 <span id="projectnumber">Version 2.8.0</span>
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<div class="title">ex_hello.c</div> </div>
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<div class="contents">
<p>This is an example of how to create and open a database.</p>
<div class="fragment"><div class="line"><span class="comment">/*-</span></div>
<div class="line"><span class="comment"> * Public Domain 2014-2016 MongoDB, Inc.</span></div>
<div class="line"><span class="comment"> * Public Domain 2008-2014 WiredTiger, Inc.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * This is free and unencumbered software released into the public domain.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * Anyone is free to copy, modify, publish, use, compile, sell, or</span></div>
<div class="line"><span class="comment"> * distribute this software, either in source code form or as a compiled</span></div>
<div class="line"><span class="comment"> * binary, for any purpose, commercial or non-commercial, and by any</span></div>
<div class="line"><span class="comment"> * means.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * In jurisdictions that recognize copyright laws, the author or authors</span></div>
<div class="line"><span class="comment"> * of this software dedicate any and all copyright interest in the</span></div>
<div class="line"><span class="comment"> * software to the public domain. We make this dedication for the benefit</span></div>
<div class="line"><span class="comment"> * of the public at large and to the detriment of our heirs and</span></div>
<div class="line"><span class="comment"> * successors. We intend this dedication to be an overt act of</span></div>
<div class="line"><span class="comment"> * relinquishment in perpetuity of all present and future rights to this</span></div>
<div class="line"><span class="comment"> * software under copyright law.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span></div>
<div class="line"><span class="comment"> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span></div>
<div class="line"><span class="comment"> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.</span></div>
<div class="line"><span class="comment"> * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR</span></div>
<div class="line"><span class="comment"> * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,</span></div>
<div class="line"><span class="comment"> * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR</span></div>
<div class="line"><span class="comment"> * OTHER DEALINGS IN THE SOFTWARE.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * ex_hello.c</span></div>
<div class="line"><span class="comment"> * This is an example demonstrating how to create and connect to a</span></div>
<div class="line"><span class="comment"> * database.</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"></div>
<div class="line"><span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><span class="preprocessor">#include <stdlib.h></span></div>
<div class="line"><span class="preprocessor">#include <string.h></span></div>
<div class="line"></div>
<div class="line"><span class="preprocessor">#include <wiredtiger.h></span></div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *home;</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">int</span></div>
<div class="line">main(<span class="keywordtype">void</span>)</div>
<div class="line">{</div>
<div class="line"> <a name="_a0"></a><a class="code" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html">WT_CONNECTION</a> *conn;</div>
<div class="line"> <a name="_a1"></a><a class="code" href="struct_w_t___s_e_s_s_i_o_n.html">WT_SESSION</a> *session;</div>
<div class="line"> <span class="keywordtype">int</span> ret;</div>
<div class="line"></div>
<div class="line"> <span class="comment">/*</span></div>
<div class="line"><span class="comment"> * Create a clean test directory for this run of the test program if the</span></div>
<div class="line"><span class="comment"> * environment variable isn't already set (as is done by make check).</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"> <span class="keywordflow">if</span> (getenv(<span class="stringliteral">"WIREDTIGER_HOME"</span>) == NULL) {</div>
<div class="line"> home = <span class="stringliteral">"WT_HOME"</span>;</div>
<div class="line"> ret = system(<span class="stringliteral">"rm -rf WT_HOME && mkdir WT_HOME"</span>);</div>
<div class="line"> } <span class="keywordflow">else</span></div>
<div class="line"> home = NULL;</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Open a connection to the database, creating it if necessary. */</span></div>
<div class="line"> <span class="keywordflow">if</span> ((ret = <a name="a2"></a><a class="code" href="group__wt.html#ga9e6adae3fc6964ef837a62795c7840ed">wiredtiger_open</a>(home, NULL, <span class="stringliteral">"create"</span>, &conn)) != 0)</div>
<div class="line"> fprintf(stderr, <span class="stringliteral">"Error connecting to %s: %s\n"</span>,</div>
<div class="line"> home, <a name="a3"></a><a class="code" href="group__wt.html#gae8bf720ddb4a7a7390b70424594c40fd">wiredtiger_strerror</a>(ret));</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Open a session for the current thread's work. */</span></div>
<div class="line"> <span class="keywordflow">if</span> ((ret = conn-><a name="a4"></a><a class="code" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html#afc75c44ff4497627c59d9b6aaa64c9d8">open_session</a>(conn, NULL, NULL, &session)) != 0)</div>
<div class="line"> fprintf(stderr, <span class="stringliteral">"Error opening a session on %s: %s\n"</span>,</div>
<div class="line"> home, <a class="code" href="group__wt.html#gae8bf720ddb4a7a7390b70424594c40fd">wiredtiger_strerror</a>(ret));</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Do some work... */</span></div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Note: closing the connection implicitly closes open session(s). */</span></div>
<div class="line"> <span class="keywordflow">if</span> ((ret = conn-><a name="a5"></a><a class="code" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html#af535c517df851eeac8ebf3594d40b545">close</a>(conn, NULL)) != 0)</div>
<div class="line"> fprintf(stderr, <span class="stringliteral">"Error closing %s: %s\n"</span>,</div>
<div class="line"> home, <a class="code" href="group__wt.html#gae8bf720ddb4a7a7390b70424594c40fd">wiredtiger_strerror</a>(ret));</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">return</span> (ret);</div>
<div class="line">}</div>
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