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freebsd/lib/libc/sys/getfh.2

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.\" Copyright (c) 1989, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
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.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" @(#)getfh.2 8.1 (Berkeley) 6/9/93
1999-08-28 00:22:10 +00:00
.\" $FreeBSD$
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.\"
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.Dd April 6, 2004
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.Dt GETFH 2
.Os
.Sh NAME
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.Nm getfh ,
.Nm lgetfh
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.Nd get file handle
.Sh LIBRARY
.Lb libc
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.Sh SYNOPSIS
.In sys/param.h
.In sys/mount.h
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.Ft int
.Fn getfh "const char *path" "fhandle_t *fhp"
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.Ft int
.Fn lgetfh "const char *path" "fhandle_t *fhp"
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.Sh DESCRIPTION
The
.Fn getfh
system call
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returns a file handle for the specified file or directory
in the file handle pointed to by
.Fa fhp .
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The
.Fn lgetfh
system call is like
.Fn getfh
except in the case where the named file is a symbolic link,
in which case
.Fn lgetfh
returns information about the link,
while
.Fn getfh
returns information about the file the link references.
These system calls are restricted to the superuser.
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.Sh RETURN VALUES
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.Rv -std
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.Sh ERRORS
The
.Fn getfh
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and
.Fn lgetfgh
system calls
fail if one or more of the following are true:
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.Bl -tag -width Er
.It Bq Er ENOTDIR
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A component of the path prefix of
.Fa path
is not a directory.
.It Bq Er ENAMETOOLONG
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The length of a component of
.Fa path
exceeds 255 characters,
or the length of
.Fa path
exceeds 1023 characters.
.It Bq Er ENOENT
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The file referred to by
.Fa path
does not exist.
.It Bq Er EACCES
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Search permission is denied for a component of the path prefix of
.Fa path .
.It Bq Er ELOOP
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Too many symbolic links were encountered in translating
.Fa path .
.It Bq Er EFAULT
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The
.Fa fhp
argument
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points to an invalid address.
.It Bq Er EIO
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An
.Tn I/O
error occurred while reading from or writing to the file system.
.El
.Sh HISTORY
The
.Fn getfh
system call first appeared in
.Bx 4.4 .