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<a accesskey="3" href="page.php?w=write_%28system_call%29&amp;p=2">3.Next</a>
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<p>The <b>write</b> is one of the most basic <a href="page.php?w=Subroutine">routines</a> provided by a <a href="page.php?w=Unix-like">Unix-like</a> <a href="page.php?w=operating_system">operating system</a> <a href="page.php?w=kernel_%28operating_system%29">kernel</a>. It writes data from a buffer declared by the user to a given device, such as a file. This is the primary way to output data from a program by directly using a system call. The destination is identified by a <a href="page.php?w=file_descriptor">numeric code</a>. The <a href="page.php?w=String_%28computer_science%29">data</a></p><p>
<a accesskey="3" href="page.php?w=write_%28system_call%29&amp;p=2">3.Next</a>
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