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| <h5 class="unnumberedsubsubsec">isatty</h5> |
| |
| <p><a name="index-isatty_002c-file_002di_002fo-system-call-2514"></a> |
| <dl> |
| <dt>Synopsis:<dd> |
| <pre class="smallexample"> int isatty(int fd); |
| </pre> |
| <br><dt>Request:<dd>‘<samp><span class="samp">Fisatty,</span><var>fd</var></samp>’ |
| |
| <br><dt>Return value:<dd>Returns 1 if <var>fd</var> refers to the <span class="sc">gdb</span> console, 0 otherwise. |
| |
| <br><dt>Errors:<dd> |
| <dl> |
| <dt><code>EINTR</code><dd>The call was interrupted by the user. |
| </dl> |
| |
| </dl> |
| |
| <p>Note that the <code>isatty</code> call is treated as a special case: it returns |
| 1 to the target if the file descriptor is attached |
| to the <span class="sc">gdb</span> console, 0 otherwise. Implementing through system calls |
| would require implementing <code>ioctl</code> and would be more complex than |
| needed. |
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