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<title>GFAL2: gfal_testrw.c</title>
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<div id="projectname">GFAL2
 <span id="projectnumber">2.6.8</span>
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<div class="title">gfal_testrw.c</div> </div>
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<p>This example show how to open, write a file and read it after ex : use case with SRM plugin : ./gfal_testrw srm://grid05.lal.in2p3.fr:8446/dpm/lal.in2p3.fr/home/dteam/test_yoda</p>
<div class="fragment"><div class="line"></div>
<div class="line"><span class="preprocessor">#include <fcntl.h></span></div>
<div class="line"><span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><span class="preprocessor">#include <<a class="code" href="gfal__api_8h.html">gfal_api.h</a>></span></div>
<div class="line"><span class="preprocessor">#include <stdlib.h></span></div>
<div class="line"><span class="preprocessor">#define BLKLEN 65536</span></div>
<div class="line"><span class="preprocessor"></span></div>
<div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)</div>
<div class="line">{</div>
<div class="line"> <span class="keywordtype">int</span> fd;</div>
<div class="line"> <span class="keywordtype">int</span> i;</div>
<div class="line"> <span class="keywordtype">char</span> ibuf[BLKLEN];</div>
<div class="line"> <span class="keywordtype">char</span> obuf[BLKLEN];</div>
<div class="line"> <span class="keywordtype">int</span> rc;</div>
<div class="line"></div>
<div class="line"> <span class="comment">// gfal_set_verbose(GFAL_VERBOSE_TRACE | GFAL_VERBOSE_VERBOSE); // switch Gfal in verbose mode</span></div>
<div class="line"> <span class="keywordflow">if</span> (argc != 2) {</div>
<div class="line"> fprintf (stderr, <span class="stringliteral">"usage: %s filename\n"</span>, argv[0]);</div>
<div class="line"> exit (1);</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">for</span> (i = 0; i < BLKLEN; i++)</div>
<div class="line"> obuf[i] = i;</div>
<div class="line"></div>
<div class="line"> printf (<span class="stringliteral">"creating file %s\n"</span>, argv[1]);</div>
<div class="line"> <span class="keywordflow">if</span> ((fd = <a name="a0"></a><a class="code" href="group__posix__group.html#gace61299f028a53738792d67c166433d5">gfal_open</a> (argv[1], O_WRONLY|O_CREAT, 0644)) < 0) {</div>
<div class="line"> <a name="a1"></a><a class="code" href="group__posix__group.html#gac937c592821b1f2f7686c576e2594cba">gfal_posix_check_error</a>();</div>
<div class="line"> exit (1);</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> printf (<span class="stringliteral">"open successful, fd = %d\n"</span>, fd);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> ((rc = <a name="a2"></a><a class="code" href="group__posix__group.html#gafe7ed132ad1c8d93f73f59d7dfd94940">gfal_write</a> (fd, obuf, BLKLEN)) != BLKLEN) {</div>
<div class="line"> <a class="code" href="group__posix__group.html#gac937c592821b1f2f7686c576e2594cba">gfal_posix_check_error</a>();</div>
<div class="line"> (void) <a name="a3"></a><a class="code" href="group__posix__group.html#gad6751ad14ea731518b298cdf58701ed0">gfal_close</a> (fd);</div>
<div class="line"> exit (1);</div>
<div class="line"> }</div>
<div class="line"> printf (<span class="stringliteral">"write successful\n"</span>);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> ((rc = <a class="code" href="group__posix__group.html#gad6751ad14ea731518b298cdf58701ed0">gfal_close</a> (fd)) < 0) {</div>
<div class="line"> <a class="code" href="group__posix__group.html#gac937c592821b1f2f7686c576e2594cba">gfal_posix_check_error</a>();</div>
<div class="line"> exit (1);</div>
<div class="line"> }</div>
<div class="line"> printf (<span class="stringliteral">"close successful\n"</span>);</div>
<div class="line"></div>
<div class="line"></div>
<div class="line"> printf (<span class="stringliteral">"reading back %s\n"</span>, argv[1]);</div>
<div class="line"> <span class="keywordflow">if</span> ((fd = <a class="code" href="group__posix__group.html#gace61299f028a53738792d67c166433d5">gfal_open</a> (argv[1], O_RDONLY, 0)) < 0) {</div>
<div class="line"> <a class="code" href="group__posix__group.html#gac937c592821b1f2f7686c576e2594cba">gfal_posix_check_error</a>();</div>
<div class="line"> exit (1);</div>
<div class="line"> }</div>
<div class="line"> printf (<span class="stringliteral">"open successful, fd = %d\n"</span>, fd);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> ((rc = <a name="a4"></a><a class="code" href="group__posix__group.html#ga8eb2fe8a19bef9f341ac4f986b082136">gfal_read</a> (fd, ibuf, BLKLEN)) != BLKLEN) {</div>
<div class="line"> <a class="code" href="group__posix__group.html#gac937c592821b1f2f7686c576e2594cba">gfal_posix_check_error</a>();</div>
<div class="line"> (void) <a class="code" href="group__posix__group.html#gad6751ad14ea731518b298cdf58701ed0">gfal_close</a> (fd);</div>
<div class="line"> exit (1);</div>
<div class="line"> }</div>
<div class="line"> printf (<span class="stringliteral">"read successful\n"</span>);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> ((rc = <a class="code" href="group__posix__group.html#gad6751ad14ea731518b298cdf58701ed0">gfal_close</a> (fd)) < 0) {</div>
<div class="line"> <a class="code" href="group__posix__group.html#gac937c592821b1f2f7686c576e2594cba">gfal_posix_check_error</a>();</div>
<div class="line"> exit (1);</div>
<div class="line"> }</div>
<div class="line"> printf (<span class="stringliteral">"close successful\n"</span>);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">for</span> (i = 0; i < BLKLEN; i++) {</div>
<div class="line"> <span class="keywordflow">if</span> (ibuf[i] != obuf[i]) {</div>
<div class="line"> fprintf (stderr, <span class="stringliteral">"compare failed at offset %d\n"</span>, i);</div>
<div class="line"> exit (1);</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> printf (<span class="stringliteral">"compare successful\n"</span>);</div>
<div class="line"> exit (0);</div>
<div class="line">}</div>
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