140 lines
3.6 KiB
HTML
140 lines
3.6 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of avc_context_to_sid</TITLE>
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</HEAD><BODY>
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<H1>avc_context_to_sid</H1>
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Section: SELinux API documentation (3)<BR>Updated: 27 May 2004<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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avc_context_to_sid, avc_sid_to_context, avc_get_initial_sid - obtain and manipulate SELinux security ID's
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>#include <<A HREF="file:///usr/include/selinux/selinux.h">selinux/selinux.h</A>></B>
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<BR>
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<B>#include <<A HREF="file:///usr/include/selinux/avc.h">selinux/avc.h</A>></B>
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<P>
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<B>int avc_context_to_sid(char *</B><I>ctx</I><B>, security_id_t *</B><I>sid</I><B>);</B>
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<P>
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<B>int avc_sid_to_context(security_id_t </B><I>sid</I><B>, char **</B><I>ctx</I><B>);</B>
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<P>
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<B>int avc_get_initial_sid(const char *</B><I>name</I><B>, security_id_t *</B><I>sid</I><B>);</B>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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Security ID's (SID's) are opaque representations of security contexts, managed by the userspace AVC.
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<P>
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<B>avc_context_to_sid</B>()
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returns a SID for the given
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<I>context</I>
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in the memory referenced by
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<I>sid</I>.
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<P>
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<B>avc_sid_to_context</B>()
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returns a copy of the context represented by
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<I>sid</I>
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in the memory referenced by
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<I>ctx</I>.
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The user must free the copy with
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<B><A HREF="/cgi-bin/man/man2html?3+freecon">freecon</A></B>(3).
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<P>
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<B>avc_get_initial_sid</B>()
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returns a SID for the kernel initial security identifier specified by
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<I>name</I>.
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<A NAME="lbAE"> </A>
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<H2>RETURN VALUE</H2>
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<B>avc_context_to_sid</B>()
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and
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<B>avc_sid_to_context</B>()
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return zero on success. On error, -1 is returned and
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<I>errno</I>
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is set appropriately.
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<A NAME="lbAF"> </A>
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<H2>ERRORS</H2>
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<DL COMPACT>
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<DT id="1"><B>ENOMEM</B>
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<DD>
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An attempt to allocate memory failed.
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</DL>
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<A NAME="lbAG"> </A>
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<H2>NOTES</H2>
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As of libselinux version 2.0.86, SID's are no longer reference counted. A SID will be valid from the time it is first obtained until the next call to
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<B><A HREF="/cgi-bin/man/man2html?3+avc_destroy">avc_destroy</A></B>(3).
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The
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<B><A HREF="/cgi-bin/man/man2html?3+sidget">sidget</A></B>(3)
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and
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<B><A HREF="/cgi-bin/man/man2html?3+sidput">sidput</A></B>(3)
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functions, formerly used to adjust the reference count, are no-ops and are deprecated.
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<A NAME="lbAH"> </A>
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<H2>AUTHOR</H2>
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Eamon Walsh <<A HREF="mailto:ewalsh@tycho.nsa.gov">ewalsh@tycho.nsa.gov</A>>
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<A NAME="lbAI"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?3+avc_init">avc_init</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+avc_has_perm">avc_has_perm</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+avc_cache_stats">avc_cache_stats</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+avc_add_callback">avc_add_callback</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+getcon">getcon</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+freecon">freecon</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?8+selinux">selinux</A></B>(8)
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="2"><A HREF="#lbAB">NAME</A><DD>
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<DT id="3"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="4"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="5"><A HREF="#lbAE">RETURN VALUE</A><DD>
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<DT id="6"><A HREF="#lbAF">ERRORS</A><DD>
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<DT id="7"><A HREF="#lbAG">NOTES</A><DD>
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<DT id="8"><A HREF="#lbAH">AUTHOR</A><DD>
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<DT id="9"><A HREF="#lbAI">SEE ALSO</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:36 GMT, March 31, 2021
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