FHOPEN(2) System Calls Manual FHOPEN(2)

fhopenopen a file by file handle

#include <sys/types.h>
#include <sys/mount.h>

int
fhopen(const struct fhandle *fhp, int flags);

The file specified by the given file handle is opened for reading and/or writing, as specified by the argument flags; the file descriptor is returned to the calling process.

This system call is restricted to the super-user and is used by an NFS server's rpc.lockd(8) daemon to open a file in order to perform locking operations on it.

Upon successful completion, a value of 0 is returned. Otherwise, -1 is returned and the global variable errno is set to indicate the error.

fhopen() fails if one or more of the following are true:

[ESTALE]
The file handle no longer refers to a valid, NFS-exported object.
[EPERM]
The caller is not the super-user.
[EINVAL]
There was a problem with the value of one of the arguments.
[EFAULT]
fhp points to an invalid address.

rpc.lockd(8)

January 9, 2007 macOS 14.4