xcu_chap01.html

IEEE 1003.1-2003, Single Unix Specification v3

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<p class="tent">postfix --</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">unary +</p>
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<p class="tent">Section 6.5.3, Unary Operators</p>
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<p class="tent">unary -</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">prefix ++</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">prefix --</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">&#152;</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">!</p>
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<p class="tent">&nbsp;</p>
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<p class="tent"><i>sizeof</i>()</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">*</p>
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<p class="tent">Section 6.5.5, Multiplicative Operators</p>
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<p class="tent">/</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">%</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">+</p>
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<p class="tent">Section 6.5.6, Additive Operators</p>
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<p class="tent">-</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">&lt;&lt;</p>
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<p class="tent">Section 6.5.7, Bitwise Shift Operators</p>
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<p class="tent">&gt;&gt;</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">&lt;, &lt;=</p>
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<p class="tent">Section 6.5.8, Relational Operators</p>
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<p class="tent">&gt;, &gt;=</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">==</p>
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<p class="tent">Section 6.5.9, Equality Operators</p>
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<p class="tent">!=</p>
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<p class="tent">&nbsp;</p>
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<p class="tent">&amp;</p>
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<p class="tent">Section 6.5.10, Bitwise AND Operator</p>
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<p class="tent">^</p>
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<p class="tent">Section 6.5.11, Bitwise Exclusive OR Operator</p>
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<p class="tent">|</p>
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<p class="tent">Section 6.5.12, Bitwise Inclusive OR Operator</p>
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<p class="tent">&amp;&amp;</p>
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<p class="tent">Section 6.5.13, Logical AND Operator</p>
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<p class="tent">||</p>
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<p class="tent">Section 6.5.14, Logical OR Operator</p>
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<p class="tent"><i>expr</i>?<i>expr</i>:<i>expr</i></p>
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<p class="tent">Section 6.5.15, Conditional Operator</p>
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<p class="tent">=, *=, /=, %=, +=, -=</p>
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<p class="tent">Section 6.5.16, Assignment Operators</p>
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<p class="tent">&lt;&lt;=, &gt;&gt;=, &amp;=, ^=, |=</p>
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<p class="tent">&nbsp;</p>
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<p class="tent"><b>if</b> ()</p>
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<p class="tent">Section 6.8.4, Selection Statements</p>
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<p class="tent"><b>if</b> () ... <b>else</b></p>
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<p class="tent">&nbsp;</p>
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<p class="tent"><b>switch</b> ()</p>
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<p class="tent">&nbsp;</p>
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<p class="tent"><b>while</b> ()</p>
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<p class="tent">Section 6.8.5, Iteration Statements</p>
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<p class="tent"><b>do</b> ... <b>while</b> ()</p>
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<p class="tent">&nbsp;</p>
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<p class="tent"><b>for</b> ()</p>
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<p class="tent">&nbsp;</p>
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<p class="tent"><b>goto</b></p>
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<p class="tent">Section 6.8.6, Jump Statements</p>
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<p class="tent"><b>continue</b></p>
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<p class="tent">&nbsp;</p>
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<p class="tent"><b>break</b></p>
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<p class="tent">&nbsp;</p>
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<p class="tent"><b>return</b></p>
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<p class="tent">&nbsp;</p>
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<p>The evaluation of arithmetic expressions shall be equivalent to that described in Section 6.5, Expressions, of the ISO&nbsp;C
standard.</p>

<h5><a name="tag_01_07_02_02"></a>Mathematical Functions</h5>

<p>Any mathematical functions with the same names as those in the following sections of the ISO&nbsp;C standard:</p>

<ul>
<li>
<p>Section 7.12, Mathematics, <tt>&lt;math.h&gt;</tt></p>
</li>

<li>
<p>Section 7.20.2, Pseudo-Random Sequence Generation Functions</p>
</li>
</ul>

<p>shall be implemented to return the results equivalent to those returned from a call to the corresponding function described in
the ISO&nbsp;C standard.</p>

<h3><a name="tag_01_08"></a>Portability</h3>

<p>Some of the utilities in the Shell and Utilities volume of IEEE&nbsp;Std&nbsp;1003.1-2001 and functions in the System Interfaces
volume of IEEE&nbsp;Std&nbsp;1003.1-2001 describe functionality that might not be fully portable to systems meeting the
requirements for POSIX conformance (see the Base Definitions volume of IEEE&nbsp;Std&nbsp;1003.1-2001, <a href=
"../basedefs/xbd_chap02.html#tag_02">Chapter 2, Conformance</a>).</p>

<p>Where optional, enhanced, or reduced functionality is specified, the text is shaded and a code in the margin identifies the
nature of the option, extension, or warning (see <a href="#tag_01_08_01">Codes</a> ). For maximum portability, an application
should avoid such functionality.</p>

<p>Unless the primary task of a utility is to produce textual material on its standard output, application developers should not
rely on the format or content of any such material that may be produced. Where the primary task <i>is</i> to provide such material,
but the output format is incompletely specified, the description is marked with the OF margin code and shading. Application