75 lines
3.0 KiB
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75 lines
3.0 KiB
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<title>isatty - Debugging with GDB</title>
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<body>
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<div class="node">
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<a name="isatty"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="system.html#system">system</a>,
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Previous: <a rel="previous" accesskey="p" href="gettimeofday.html#gettimeofday">gettimeofday</a>,
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Up: <a rel="up" accesskey="u" href="List-of-Supported-Calls.html#List-of-Supported-Calls">List of Supported Calls</a>
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<hr>
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</div>
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<h5 class="unnumberedsubsubsec">isatty</h5>
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<p><a name="index-isatty_002c-file_002di_002fo-system-call-3614"></a>
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<dl>
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<dt>Synopsis:<dd>
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<pre class="smallexample"> int isatty(int fd);
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</pre>
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<br><dt>Request:<dd>‘<samp><span class="samp">Fisatty,</span><var>fd</var></samp>’
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<br><dt>Return value:<dd>Returns 1 if <var>fd</var> refers to the <span class="sc">gdb</span> console, 0 otherwise.
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<br><dt>Errors:<dd>
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<dl>
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<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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<p>Note that the <code>isatty</code> call is treated as a special case: it returns
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1 to the target if the file descriptor is attached
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to the <span class="sc">gdb</span> console, 0 otherwise. Implementing through system calls
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would require implementing <code>ioctl</code> and would be more complex than
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needed.
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</body></html>
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