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23 <center><font size="2">The Open Group Base Specifications Issue 8<br>
24 IEEE Std 1003.1-2024<br>
25 Copyright © 2001-2024 The IEEE and The Open Group</font></center>
26 <hr size="2" noshade>
27 <a name="top" id="top"></a> <a name="link" id="link"></a> <a name="tag_20_66" id="tag_20_66"></a><!-- link -->
28 <h4 class="mansect"><a name="tag_20_66_01" id="tag_20_66_01"></a>NAME</h4>
29 <blockquote>link — call link function</blockquote>
30 <h4 class="mansect"><a name="tag_20_66_02" id="tag_20_66_02"></a>SYNOPSIS</h4>
31 <blockquote class="synopsis">
32 <div class="box"><code><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt=
33 "[Option Start]" border="0"> link</tt> <i>file1 file2</i> <tt><img src="../images/opt-end.gif" alt="[Option End]" border=
34 "0"></tt></code></div>
35 </blockquote>
36 <h4 class="mansect"><a name="tag_20_66_03" id="tag_20_66_03"></a>DESCRIPTION</h4>
37 <blockquote>
38 <p>The <i>link</i> utility shall perform the function call:</p>
39 <pre>
40 <tt>link(</tt><i>file1</i><tt>, </tt><i>file2</i><tt>);
41 </tt></pre>
42 <p>A user may need appropriate privileges to invoke the <i>link</i> utility.</p>
43 </blockquote>
44 <h4 class="mansect"><a name="tag_20_66_04" id="tag_20_66_04"></a>OPTIONS</h4>
45 <blockquote>
46 <p>None.</p>
47 </blockquote>
48 <h4 class="mansect"><a name="tag_20_66_05" id="tag_20_66_05"></a>OPERANDS</h4>
49 <blockquote>
50 <p>The following operands shall be supported:</p>
51 <dl compact>
52 <dd></dd>
53 <dt><i>file1</i></dt>
54 <dd>The pathname of an existing file.</dd>
55 <dt><i>file2</i></dt>
56 <dd>The pathname of the new directory entry to be created.</dd>
57 </dl>
58 </blockquote>
59 <h4 class="mansect"><a name="tag_20_66_06" id="tag_20_66_06"></a>STDIN</h4>
60 <blockquote>
61 <p>Not used.</p>
62 </blockquote>
63 <h4 class="mansect"><a name="tag_20_66_07" id="tag_20_66_07"></a>INPUT FILES</h4>
64 <blockquote>
65 <p>Not used.</p>
66 </blockquote>
67 <h4 class="mansect"><a name="tag_20_66_08" id="tag_20_66_08"></a>ENVIRONMENT VARIABLES</h4>
68 <blockquote>
69 <p>The following environment variables shall affect the execution of <i>link</i>:</p>
70 <dl compact>
71 <dd></dd>
72 <dt><i>LANG</i></dt>
73 <dd>Provide a default value for the internationalization variables that are unset or null. (See XBD <a href=
74 "../basedefs/V1_chap08.html#tag_08_02"><i>8.2 Internationalization Variables</i></a> for the precedence of internationalization
75 variables used to determine the values of locale categories.)</dd>
76 <dt><i>LC_ALL</i></dt>
77 <dd>If set to a non-empty string value, override the values of all the other internationalization variables.</dd>
78 <dt><i>LC_CTYPE</i></dt>
79 <dd>Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as
80 opposed to multi-byte characters in arguments).</dd>
81 <dt><i>LC_MESSAGES</i></dt>
82 <dd><br>
83 Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error.</dd>
84 <dt><i>NLSPATH</i></dt>
85 <dd>Determine the location of messages objects and message catalogs.</dd>
86 </dl>
87 </blockquote>
88 <h4 class="mansect"><a name="tag_20_66_09" id="tag_20_66_09"></a>ASYNCHRONOUS EVENTS</h4>
89 <blockquote>
90 <p>Default.</p>
91 </blockquote>
92 <h4 class="mansect"><a name="tag_20_66_10" id="tag_20_66_10"></a>STDOUT</h4>
93 <blockquote>
94 <p>None.</p>
95 </blockquote>
96 <h4 class="mansect"><a name="tag_20_66_11" id="tag_20_66_11"></a>STDERR</h4>
97 <blockquote>
98 <p>The standard error shall be used only for diagnostic messages.</p>
99 </blockquote>
100 <h4 class="mansect"><a name="tag_20_66_12" id="tag_20_66_12"></a>OUTPUT FILES</h4>
101 <blockquote>
102 <p>None.</p>
103 </blockquote>
104 <h4 class="mansect"><a name="tag_20_66_13" id="tag_20_66_13"></a>EXTENDED DESCRIPTION</h4>
105 <blockquote>
106 <p>None.</p>
107 </blockquote>
108 <h4 class="mansect"><a name="tag_20_66_14" id="tag_20_66_14"></a>EXIT STATUS</h4>
109 <blockquote>
110 <p>The following exit values shall be returned:</p>
111 <dl compact>
112 <dd></dd>
113 <dt> 0</dt>
114 <dd>Successful completion.</dd>
115 <dt>>0</dt>
116 <dd>An error occurred.</dd>
117 </dl>
118 </blockquote>
119 <h4 class="mansect"><a name="tag_20_66_15" id="tag_20_66_15"></a>CONSEQUENCES OF ERRORS</h4>
120 <blockquote>
121 <p>Default.</p>
122 </blockquote>
123 <hr>
124 <div class="box"><em>The following sections are informative.</em></div>
125 <h4 class="mansect"><a name="tag_20_66_16" id="tag_20_66_16"></a>APPLICATION USAGE</h4>
126 <blockquote>
127 <p>None.</p>
128 </blockquote>
129 <h4 class="mansect"><a name="tag_20_66_17" id="tag_20_66_17"></a>EXAMPLES</h4>
130 <blockquote>
131 <p>None.</p>
132 </blockquote>
133 <h4 class="mansect"><a name="tag_20_66_18" id="tag_20_66_18"></a>RATIONALE</h4>
134 <blockquote>
135 <p>None.</p>
136 </blockquote>
137 <h4 class="mansect"><a name="tag_20_66_19" id="tag_20_66_19"></a>FUTURE DIRECTIONS</h4>
138 <blockquote>
139 <p>If this utility is directed to create a new directory entry that contains any bytes that have the encoded value of a
140 <newline> character, implementations are encouraged to treat this as an error. A future version of this standard may require
141 implementations to treat this as an error.</p>
142 </blockquote>
143 <h4 class="mansect"><a name="tag_20_66_20" id="tag_20_66_20"></a>SEE ALSO</h4>
144 <blockquote>
145 <p><a href="../utilities/ln.html#"><i>ln</i></a> , <a href="../utilities/unlink.html#tag_20_139"><i>unlink</i></a></p>
146 <p>XBD <a href="../basedefs/V1_chap08.html#tag_08"><i>8. Environment Variables</i></a></p>
147 <p>XSH <a href="../functions/link.html#tag_17_304"><i>link</i></a></p>
148 </blockquote>
149 <h4 class="mansect"><a name="tag_20_66_21" id="tag_20_66_21"></a>CHANGE HISTORY</h4>
150 <blockquote>
151 <p>First released in Issue 5.</p>
152 </blockquote>
153 <h4 class="mansect"><a name="tag_20_66_22" id="tag_20_66_22"></a>Issue 8</h4>
154 <blockquote>
155 <p>Austin Group Defect 251 is applied, encouraging implementations to disallow the creation of filenames containing any bytes that
156 have the encoded value of a <newline> character.</p>
157 <p>Austin Group Defect 1122 is applied, changing the description of <i>NLSPATH .</i></p>
158 </blockquote>
159 <div class="box"><em>End of informative text.</em></div>
160 <hr>
161 <p> </p>
162 <a href="#top"><span class="topOfPage">return to top of page</span></a><br>
163 <hr size="2" noshade>
164 <center><font size="2">UNIX® is a registered Trademark of The Open Group.<br>
165 POSIX™ is a Trademark of The IEEE.<br>
166 Copyright © 2001-2024 The IEEE and The Open Group, All Rights Reserved<br>
167 [ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href=
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169 ]</font></center>
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