Group (database)

<h2 id="seeing-available-groups-on-a-unix-system">Seeing available groups on a Unix system</h2>
<p>The contents of the group database (and available groups) can be seen with a variety of tools:
</p>
<h3>C</h3>
<p>The <grp.h> header file contains the functions getgrgid and getgrname to look up a group by its ID or Name, as well as the functions setgrent, getgrent, and endgrent to iterate through all groups.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a>
</p>
<h3>Command line</h3>
<p>The <a href="/facts/Getent/8DJxxm8u">getent</a> command can be used to fetch group information.
</p>
<h4>Fetching a list of all available groups</h4>
getent group

<h4>Fetching a specific group</h4>
<p>For a specific group called 'users':
</p>
getent group users

<h3>Python</h3>
<ul><li><a href="https://docs.python.org/lib/module-grp.html">grp - The Group Database</a> — a <a href="/facts/Python_(programming_language)/YbuGqofa">Python</a> module</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>Stevens, W. Richard; Rago, Stephen A. (2013). Advanced programming in the UNIX environment (third ed.). Upper Saddle River (NJ): Addison-Wesley. pp. 182–183. ISBN 978-0-321-63773-4. <a href="978-0-321-63773-4" target="_blank">978-0-321-63773-4</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>Stevens, W. Richard; Rago, Stephen A. (2013). Advanced programming in the UNIX environment (third ed.). Upper Saddle River (NJ): Addison-Wesley. pp. 182–183. ISBN 978-0-321-63773-4. <a href="978-0-321-63773-4" target="_blank">978-0-321-63773-4</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
</ol>

Group (database) open-in-new

Group (database)