'\" te
.\" Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
.TH fstyp_init 3FSTYP "22 Oct 2010" "SunOS 5.11" "File System Type Identification Library Functions"
.SH NAME
fstyp_init, fstyp_fini \- initialize and finalize libfstyp handle
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR\&.\|.\|. ] \fIfile\fR\&.\|.\|. \fB-lfstyp\fR \fB -lnvpair \fR [ \fIlibrary\fR\&.\|.\|. ]
#include <libnvpair.h>
#include <libfstyp.h>

\fBint\fR \fBfstyp_init\fR(\fBint\fR \fIfd\fR, \fBoff64_t **\fR\fIoffset\fR, \fBchar *\fR\fImodule_dir\fR,
     \fBfstyp_handle_t *\fR\fIhandle\fR);
.fi

.LP
.nf
\fBvoid\fR \fBfstyp_fini\fR(\fBfstyp_handle_t\fR \fIhandle\fR);
.fi

.SH PARAMETERS
.sp
.ne 2
.mk
.na
\fB\fIfd\fR\fR
.ad
.RS 14n
.rt  
Open file descriptor of a block or a raw device that contains the file system to be identified.
.RE

.sp
.ne 2
.mk
.na
\fB\fIoffset\fR\fR
.ad
.RS 14n
.rt  
Offset from the beginning of the device where the file system is located.
.RE

.sp
.ne 2
.mk
.na
\fB\fImodule_dir\fR\fR
.ad
.RS 14n
.rt  
Optional location of the \fBlibfstyp\fR modules.
.RE

.sp
.ne 2
.mk
.na
\fB\fIhandle\fR\fR
.ad
.RS 14n
.rt  
Opaque handle to be used with \fBlibfstyp\fR functions.
.RE

.SH DESCRIPTION
.sp
.LP
The \fBfstyp_init()\fR function returns a \fIhandle\fR associated with the specified parameters. This \fIhandle\fR should be used with all other \fBlibfstyp\fR functions.
.sp
.LP
If \fImodule_dir\fR is \fINULL\fR, \fBfstyp_init()\fR looks for modules in the default location: \fB/usr/lib/fs\fR subdirectories. The \fBfstyp_init()\fR function locates \fBlibfstyp\fR modules, but might defer loading the modules until the subsequent \fBfstyp_ident()\fR call.
.sp
.LP
If \fImodule_dir\fR is other than \fINULL\fR, the \fBfstyp_init()\fR function locates a module in the directory that is specified. If no module is found, \fBfstyp_init\fR fails with \fBFSTYP_ERR_MOD_NOT_FOUND\fR.
.sp
.LP
Modules that do not support non-zero offset can fail \fBfstyp_init()\fR with \fBFSTYP_ERR_OFFSET\fR.
.sp
.LP
The \fBfstyp_fini()\fR function releases all resources associated with a handle and invalidates the handle.
.SH RETURN VALUES
.sp
.LP
The \fBfstyp_init()\fR function returns \fB0\fR on success and an error value on failure. See \fBfstyp_strerror\fR(3FSTYP).
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBfstyp_ident\fR(3FSTYP), \fBfstyp_mod_init\fR(3FSTYP), \fBfstyp_strerror\fR(3FSTYP), \fBlibfstyp\fR(3LIB), \fBattributes\fR(5)