freebsd-nq/lib/libc/sys/getfh.2

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.\"	@(#)getfh.2	8.1 (Berkeley) 6/9/93
.\" $FreeBSD$
.\"
.Dd April 6, 2004
.Dt GETFH 2
.Os
.Sh NAME
.Nm getfh ,
.Nm lgetfh
.Nd get file handle
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/param.h
.In sys/mount.h
.Ft int
.Fn getfh "const char *path" "fhandle_t *fhp"
.Ft int
.Fn lgetfh "const char *path" "fhandle_t *fhp"
.Sh DESCRIPTION
The
.Fn getfh
system call
returns a file handle for the specified file or directory
in the file handle pointed to by
.Fa fhp .
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.
.Sh RETURN VALUES
.Rv -std
.Sh ERRORS
The
.Fn getfh
and
.Fn lgetfgh
system calls
fail if one or more of the following are true:
.Bl -tag -width Er
.It Bq Er ENOTDIR
A component of the path prefix of
.Fa path
is not a directory.
.It Bq Er ENAMETOOLONG
The length of a component of
.Fa path
exceeds 255 characters,
or the length of
.Fa path
exceeds 1023 characters.
.It Bq Er ENOENT
The file referred to by
.Fa path
does not exist.
.It Bq Er EACCES
Search permission is denied for a component of the path prefix of
.Fa path .
.It Bq Er ELOOP
Too many symbolic links were encountered in translating
.Fa path .
.It Bq Er EFAULT
The
.Fa fhp
argument
points to an invalid address.
.It Bq Er EIO
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 .