163 lines
3.7 KiB
HTML
163 lines
3.7 KiB
HTML
|
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<HTML><HEAD><TITLE>Man page of INITGROUPS</TITLE>
|
|
</HEAD><BODY>
|
|
<H1>INITGROUPS</H1>
|
|
Section: Linux Programmer's Manual (3)<BR>Updated: 2017-09-15<BR><A HREF="#index">Index</A>
|
|
<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
|
|
|
|
<A NAME="lbAB"> </A>
|
|
<H2>NAME</H2>
|
|
|
|
initgroups - initialize the supplementary group access list
|
|
<A NAME="lbAC"> </A>
|
|
<H2>SYNOPSIS</H2>
|
|
|
|
<PRE>
|
|
<B>#include <<A HREF="file:///usr/include/sys/types.h">sys/types.h</A>></B>
|
|
<B>#include <<A HREF="file:///usr/include/grp.h">grp.h</A>></B>
|
|
|
|
<B>int initgroups(const char *</B><I>user</I><B>, gid_t </B><I>group</I><B>);</B>
|
|
</PRE>
|
|
|
|
<P>
|
|
|
|
|
|
Feature Test Macro Requirements for glibc (see
|
|
<B><A HREF="/cgi-bin/man/man2html?7+feature_test_macros">feature_test_macros</A></B>(7)):
|
|
|
|
|
|
<P>
|
|
|
|
<B>initgroups</B>():
|
|
|
|
<BR> Since glibc 2.19:
|
|
<BR> _DEFAULT_SOURCE
|
|
<BR> Glibc 2.19 and earlier:
|
|
<BR> _BSD_SOURCE
|
|
<A NAME="lbAD"> </A>
|
|
<H2>DESCRIPTION</H2>
|
|
|
|
The
|
|
<B>initgroups</B>()
|
|
|
|
function initializes the group access list by
|
|
reading the group database
|
|
<I>/etc/group</I>
|
|
|
|
and using all groups of
|
|
which
|
|
<I>user</I>
|
|
|
|
is a member.
|
|
The additional group
|
|
<I>group</I>
|
|
|
|
is
|
|
also added to the list.
|
|
<P>
|
|
|
|
The
|
|
<I>user</I>
|
|
|
|
argument must be non-NULL.
|
|
<A NAME="lbAE"> </A>
|
|
<H2>RETURN VALUE</H2>
|
|
|
|
The
|
|
<B>initgroups</B>()
|
|
|
|
function returns 0 on success.
|
|
On error, -1 is returned, and
|
|
<I>errno</I>
|
|
|
|
is set appropriately.
|
|
<A NAME="lbAF"> </A>
|
|
<H2>ERRORS</H2>
|
|
|
|
<DL COMPACT>
|
|
<DT id="1"><B>ENOMEM</B>
|
|
|
|
<DD>
|
|
Insufficient memory to allocate group information structure.
|
|
<DT id="2"><B>EPERM</B>
|
|
|
|
<DD>
|
|
The calling process has insufficient privilege.
|
|
See the underlying system call
|
|
<B><A HREF="/cgi-bin/man/man2html?2+setgroups">setgroups</A></B>(2).
|
|
|
|
</DL>
|
|
<A NAME="lbAG"> </A>
|
|
<H2>FILES</H2>
|
|
|
|
<DL COMPACT>
|
|
<DT id="3"><I>/etc/group</I>
|
|
|
|
<DD>
|
|
group database file
|
|
</DL>
|
|
<A NAME="lbAH"> </A>
|
|
<H2>ATTRIBUTES</H2>
|
|
|
|
For an explanation of the terms used in this section, see
|
|
<B><A HREF="/cgi-bin/man/man2html?7+attributes">attributes</A></B>(7).
|
|
|
|
<TABLE BORDER>
|
|
<TR VALIGN=top><TD><B>Interface</B></TD><TD><B>Attribute</B></TD><TD><B>Value</B><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>initgroups</B>()
|
|
|
|
</TD><TD>Thread safety</TD><TD>MT-Safe locale<BR></TD></TR>
|
|
</TABLE>
|
|
|
|
<P>
|
|
<A NAME="lbAI"> </A>
|
|
<H2>CONFORMING TO</H2>
|
|
|
|
SVr4, 4.3BSD.
|
|
<A NAME="lbAJ"> </A>
|
|
<H2>SEE ALSO</H2>
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+getgroups">getgroups</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+setgroups">setgroups</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?7+credentials">credentials</A></B>(7)
|
|
|
|
<A NAME="lbAK"> </A>
|
|
<H2>COLOPHON</H2>
|
|
|
|
This page is part of release 5.05 of the Linux
|
|
<I>man-pages</I>
|
|
|
|
project.
|
|
A description of the project,
|
|
information about reporting bugs,
|
|
and the latest version of this page,
|
|
can be found at
|
|
<A HREF="https://www.kernel.org/doc/man-pages/.">https://www.kernel.org/doc/man-pages/.</A>
|
|
<P>
|
|
|
|
<HR>
|
|
<A NAME="index"> </A><H2>Index</H2>
|
|
<DL>
|
|
<DT id="4"><A HREF="#lbAB">NAME</A><DD>
|
|
<DT id="5"><A HREF="#lbAC">SYNOPSIS</A><DD>
|
|
<DT id="6"><A HREF="#lbAD">DESCRIPTION</A><DD>
|
|
<DT id="7"><A HREF="#lbAE">RETURN VALUE</A><DD>
|
|
<DT id="8"><A HREF="#lbAF">ERRORS</A><DD>
|
|
<DT id="9"><A HREF="#lbAG">FILES</A><DD>
|
|
<DT id="10"><A HREF="#lbAH">ATTRIBUTES</A><DD>
|
|
<DT id="11"><A HREF="#lbAI">CONFORMING TO</A><DD>
|
|
<DT id="12"><A HREF="#lbAJ">SEE ALSO</A><DD>
|
|
<DT id="13"><A HREF="#lbAK">COLOPHON</A><DD>
|
|
</DL>
|
|
<HR>
|
|
This document was created by
|
|
<A HREF="/cgi-bin/man/man2html">man2html</A>,
|
|
using the manual pages.<BR>
|
|
Time: 00:05:46 GMT, March 31, 2021
|
|
</BODY>
|
|
</HTML>
|