76 lines
3.0 KiB
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76 lines
3.0 KiB
HTML
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<title>read - Debugging with GDB</title>
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<a name="read"></a>
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Next: <a rel="next" accesskey="n" href="write.html#write">write</a>,
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<h5 class="unnumberedsubsubsec">read</h5>
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<p><a name="index-read_002c-file_002di_002fo-system-call-3606"></a>
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<dl>
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<dt>Synopsis:<dd>
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<pre class="smallexample"> int read(int fd, void *buf, unsigned int count);
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</pre>
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<br><dt>Request:<dd>‘<samp><span class="samp">Fread,</span><var>fd</var><span class="samp">,</span><var>bufptr</var><span class="samp">,</span><var>count</var></samp>’
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<br><dt>Return value:<dd>On success, the number of bytes read is returned.
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Zero indicates end of file. If count is zero, read
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returns zero as well. On error, -1 is returned.
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<br><dt>Errors:<dd>
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<dl>
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<dt><code>EBADF</code><dd><var>fd</var> is not a valid file descriptor or is not open for
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reading.
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<br><dt><code>EFAULT</code><dd><var>bufptr</var> is an invalid pointer value.
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<br><dt><code>EINTR</code><dd>The call was interrupted by the user.
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</dl>
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</dl>
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</body></html>
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