'\" te
.\"  Copyright 1989 AT&T  Copyright (c) 1997, Sun Microsystems, Inc.  All Rights Reserved
.TH sysfs 2 "5 Jul 1990" "SunOS 5.11" "System Calls"
.SH NAME
sysfs \- get file system type information
.SH SYNOPSIS
.LP
.nf
#include <sys/fstyp.h>
#include <sys/fsid.h>

\fBint\fR \fBsysfs\fR(\fBint\fR \fIopcode\fR, \fBconst char *\fR\fIfsname\fR);
.fi

.LP
.nf
\fBint\fR \fBsysfs\fR(\fBint\fR \fIopcode\fR, \fBint\fR \fIfs_index\fR, \fBchar *\fR\fIbuf\fR);
.fi

.LP
.nf
\fBint\fR \fBsysfs\fR(\fBint\fR \fIopcode\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBsysfs()\fR function returns information about the file system types configured  in the system.  The number of arguments accepted by \fBsysfs()\fR depends on the \fIopcode\fR argument, which can take the following values:
.sp
.ne 2
.mk
.na
\fB\fBGETFSIND\fR\fR
.ad
.RS 13n
.rt  
Translate \fIfsname\fR, a null-terminated file-system type identifier, into a file-system type index.
.RE

.sp
.ne 2
.mk
.na
\fB\fBGETFSTYP\fR\fR
.ad
.RS 13n
.rt  
Translate \fIfs_index\fR, a file-system type index, into a null-terminated file-system type identifier and write it into the buffer pointed to by \fIbuf\fR, which must be at least of size \fBFSTYPSZ\fR as defined in <\fBsys/fstyp.h\fR>.
.RE

.sp
.ne 2
.mk
.na
\fB\fBGETNFSTYP\fR\fR
.ad
.RS 13n
.rt  
Return the total number of file system types configured in the system.
.RE

.SH RETURN VALUES
.sp
.LP
Upon successful completion, the value returned depends upon the \fIopcode\fR argument as follows:
.sp
.ne 2
.mk
.na
\fB\fBGETFSIND\fR\fR
.ad
.RS 13n
.rt  
the file-system type index
.RE

.sp
.ne 2
.mk
.na
\fB\fBGETFSTYP\fR\fR
.ad
.RS 13n
.rt  
\fB0\fR
.RE

.sp
.ne 2
.mk
.na
\fB\fBGETNFSTYP\fR\fR
.ad
.RS 13n
.rt  
the number of file system types configured
.RE

.sp
.LP
Otherwise, \fB\(mi1\fR is returned  and \fBerrno\fR is set to indicate the error.
.SH ERRORS
.sp
.LP
The \fBsysfs()\fR function will fail if:
.sp
.ne 2
.mk
.na
\fB\fBEFAULT\fR\fR
.ad
.RS 10n
.rt  
The \fIbuf\fR or \fIfsname\fR argument points to an illegal address.
.RE

.sp
.ne 2
.mk
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 10n
.rt  
The \fIfsname\fR argument points to an invalid file-system identifier; the \fIfs_index\fR argument is 0 or invalid; or the \fIopcode\fR argument is invalid.
.RE