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466
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1 <refentry id="ungetc">
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2 <refnamediv>
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3 <refname>ungetc</refname>
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4 <refpurpose>Placeholder</refpurpose>
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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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468
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9 <funcsynopsisinfo>
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10 #include <stdio.h>
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11 </funcsynopsisinfo>
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466
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12 <funcprototype>
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13 <funcdef><function>ungetc</function></funcdef>
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14 <paramdef>type <parameter>arg1</parameter></paramdef>
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15 </funcprototype>
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16 </funcsynopsis>
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17
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18 </refsynopsisdiv>
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19
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20 <refsect1><title>Description</title>
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21 <para>
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546
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22 This function alters the state of the input file buffer such
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23 that the next call of "getc()" returns "ch".
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24 </para>
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25 <para>
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26 Only one character may be pushed back, and at least on
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27 character must have been read from the file before a call to
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28 ungetc.
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29 </para>
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30 <para>
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31 <quote>Fseek()</quote> erases any puchback.
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466
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32 </para>
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33 </refsect1>
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546
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34
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35 <refsect1><title>Diagnostics</title>
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36 <para>
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37 Ungetc returns its character argument unless no puchback could
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38 occur, in which case EOF is returned.
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39 </para>
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40 </refsect1>
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41
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42 <refsect1><title>See Also</title>
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43 <para>
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44 <link linkend="getc">getc()</link>,
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45 <link linkend="fseek">fseek()</link>
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46 </para>
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47 </refsect1>
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48
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466
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49 </refentry>
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