182 lines
3.6 KiB
HTML
182 lines
3.6 KiB
HTML
|
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<HTML><HEAD><TITLE>Man page of SYSFS</TITLE>
|
|
</HEAD><BODY>
|
|
<H1>SYSFS</H1>
|
|
Section: Linux Programmer's Manual (2)<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>
|
|
|
|
sysfs - get filesystem type information
|
|
<A NAME="lbAC"> </A>
|
|
<H2>SYNOPSIS</H2>
|
|
|
|
<B>int sysfs(int </B><I>option</I><B>, const char *</B><I>fsname</I><B>);</B>
|
|
|
|
<P>
|
|
|
|
<B>int sysfs(int </B><I>option</I><B>, unsigned int </B><I>fs_index</I><B>, char *</B><I>buf</I><B>);</B>
|
|
|
|
<P>
|
|
|
|
<B>int sysfs(int </B><I>option</I><B>);</B>
|
|
|
|
<A NAME="lbAD"> </A>
|
|
<H2>DESCRIPTION</H2>
|
|
|
|
<B>Note</B>:
|
|
|
|
if you are looking for information about the
|
|
<B>sysfs</B>
|
|
|
|
filesystem that is normally mounted at
|
|
<I>/sys</I>,
|
|
|
|
see
|
|
<B><A HREF="/cgi-bin/man/man2html?5+sysfs">sysfs</A></B>(5).
|
|
|
|
<P>
|
|
|
|
The (obsolete)
|
|
<B>sysfs</B>()
|
|
|
|
system call returns information about the filesystem types
|
|
currently present in the kernel.
|
|
The specific form of the
|
|
<B>sysfs</B>()
|
|
|
|
call and the information returned depends on the
|
|
<I>option</I>
|
|
|
|
in effect:
|
|
<DL COMPACT>
|
|
<DT id="1"><B>1</B>
|
|
|
|
<DD>
|
|
Translate the filesystem identifier string
|
|
<I>fsname</I>
|
|
|
|
into a filesystem type index.
|
|
<DT id="2"><B>2</B>
|
|
|
|
<DD>
|
|
Translate the filesystem type index
|
|
<I>fs_index</I>
|
|
|
|
into a null-terminated filesystem identifier string.
|
|
This string will
|
|
be written to the buffer pointed to by
|
|
<I>buf</I>.
|
|
|
|
Make sure that
|
|
<I>buf</I>
|
|
|
|
has enough space to accept the string.
|
|
<DT id="3"><B>3</B>
|
|
|
|
<DD>
|
|
Return the total number of filesystem types currently present in the
|
|
kernel.
|
|
</DL>
|
|
<P>
|
|
|
|
The numbering of the filesystem type indexes begins with zero.
|
|
<A NAME="lbAE"> </A>
|
|
<H2>RETURN VALUE</H2>
|
|
|
|
On success,
|
|
<B>sysfs</B>()
|
|
|
|
returns the filesystem index for option
|
|
<B>1</B>,
|
|
|
|
zero for option
|
|
<B>2</B>,
|
|
|
|
and the number of currently configured filesystems for option
|
|
<B>3</B>.
|
|
|
|
On error, -1 is returned, and
|
|
<I>errno</I>
|
|
|
|
is set appropriately.
|
|
<A NAME="lbAF"> </A>
|
|
<H2>ERRORS</H2>
|
|
|
|
<DL COMPACT>
|
|
<DT id="4"><B>EFAULT</B>
|
|
|
|
<DD>
|
|
Either <I>fsname</I> or <I>buf</I>
|
|
|
|
is outside your accessible address space.
|
|
<DT id="5"><B>EINVAL</B>
|
|
|
|
<DD>
|
|
<I>fsname</I>
|
|
|
|
is not a valid filesystem type identifier;
|
|
<I>fs_index</I>
|
|
|
|
is out-of-bounds;
|
|
<I>option</I>
|
|
|
|
is invalid.
|
|
</DL>
|
|
<A NAME="lbAG"> </A>
|
|
<H2>CONFORMING TO</H2>
|
|
|
|
SVr4.
|
|
<A NAME="lbAH"> </A>
|
|
<H2>NOTES</H2>
|
|
|
|
This System-V derived system call is obsolete; don't use it.
|
|
On systems with
|
|
<I>/proc</I>,
|
|
|
|
the same information can be obtained via
|
|
<I>/proc/filesystems</I>;
|
|
|
|
use that interface instead.
|
|
<A NAME="lbAI"> </A>
|
|
<H2>BUGS</H2>
|
|
|
|
There is no libc or glibc support.
|
|
There is no way to guess how large <I>buf</I> should be.
|
|
<A NAME="lbAJ"> </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="6"><A HREF="#lbAB">NAME</A><DD>
|
|
<DT id="7"><A HREF="#lbAC">SYNOPSIS</A><DD>
|
|
<DT id="8"><A HREF="#lbAD">DESCRIPTION</A><DD>
|
|
<DT id="9"><A HREF="#lbAE">RETURN VALUE</A><DD>
|
|
<DT id="10"><A HREF="#lbAF">ERRORS</A><DD>
|
|
<DT id="11"><A HREF="#lbAG">CONFORMING TO</A><DD>
|
|
<DT id="12"><A HREF="#lbAH">NOTES</A><DD>
|
|
<DT id="13"><A HREF="#lbAI">BUGS</A><DD>
|
|
<DT id="14"><A HREF="#lbAJ">COLOPHON</A><DD>
|
|
</DL>
|
|
<HR>
|
|
This document was created by
|
|
<A HREF="/cgi-bin/man/man2html">man2html</A>,
|
|
using the manual pages.<BR>
|
|
Time: 00:05:35 GMT, March 31, 2021
|
|
</BODY>
|
|
</HTML>
|