fhopenfhstatfhstatfs
- access file via file handle
LIBRARY
Lb libc
SYNOPSIS
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/stat.h> int
fhopen (const fhandle_t *fhp int flags); int
fhstat (const fhandle_t *fhp struct stat *sb); int
fhstatfs (const fhandle_t *fhp struct statfs *buf);
DESCRIPTION
These system calls provide a means to access a file given the file handle
Fa fhp .
As this method bypasses directory access restrictions, these calls are
restricted to the superuser.
The
fhopen ();
system call
opens the file referenced by
Fa fhp
for reading and/or writing as specified by the argument
Fa flags
and returns the file descriptor to the calling process.
The
Fa flags
argument
is specified by
or 'ing
together the flags used for the
open(2)
system call.
All said flags are valid except for
O_CREAT
The
fhstat ();
and
fhstatfs ();
system calls
provide the functionality of the
fstat(2)
and
fstatfs(2)
calls except that they return information for the file referred to by
Fa fhp
rather than an open file.
RETURN VALUES
Upon successful completion,
fhopen ();
returns the file descriptor for the opened file;
otherwise the value -1 is returned and the global variable
errno
is set to indicate the error.
Rv -std fhstat fhstatfs
ERRORS
In addition to the errors returned by
open(2),
fstat(2),
and
fstatfs(2)
respectively,
fhopen (,);
fhstat (,);
and
fhstatfs ();
will return
