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466
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1 <refentry id="dup">
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2 <refnamediv>
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468
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3 <refname>Dup</refname>
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4 <refpurpose>duplicate an open path number</refpurpose>
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466
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5 </refnamediv>
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6
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7 <refsynopsisdiv>
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8 <funcsynopsis>
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9 <funcprototype>
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10 <funcdef><function>dup</function></funcdef>
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541
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11 <paramdef>int <parameter>pn</parameter></paramdef>
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466
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12 </funcprototype>
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13 </funcsynopsis>
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14
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15 </refsynopsisdiv>
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16
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541
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17 <refsect1><title>Assembler Equivalent</title>
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18 <para>
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19 os9 I$DUP
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20 </para>
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21 </refsect1>
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466
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22 <refsect1><title>Description</title>
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23 <para>
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541
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24 Dup takes the path number, "pn", as returned from "open()" or
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25 "creat()" and returns another path number associated with the
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26 same file.
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27 </para>
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28 </refsect1>
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29 <refsect1><title>Diagnostics</title>
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30 <para>
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31 A -1 is returned is the call fails because there are too many
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32 files open or the path nmber is invalid.
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33 </para>
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34 </refsect1>
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35 <refsect1><title>See Also</title>
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36 <para>
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37 <link linkend="open">open()</link>,
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38 <link linkend="creat">creat()</link>,
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39 <link linkend="close">close()</link>
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466
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40 </para>
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41 </refsect1>
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42 </refentry>
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