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VOP_VPTOCNP.9freebsd

BSD mandoc

NAME

VOP_VPTOCNP - translate a vnode to its component name

SYNOPSIS

In sys/param.h In sys/vnode.h Ft int Fn VOP_VPTOCNP struct vnode *vp struct vnode **dvp char *buf int *buflen

DESCRIPTION

This translates a vnode into its component name, and writes that name to the head of the buffer specified by Fa buf

Fa vp

The vnode to translate.

Fa dvp

The vnode of the parent directory of Fa vp .

Fa buf

The buffer into which to preprend the component name.

Fa buflen

The remaining size of the buffer.

The default implementation of scans through Fa vp Ns 's parent directory looking for a dirent with a matching file number. If Fa vp is not a directory, then returns ENOENT.

LOCKS

The vnode should be locked on entry and will still be locked on exit. The parent directory vnode will be unlocked on a successful exit. However, it will have its hold count incremented.

RETURN VALUES

Zero is returned on success, otherwise an error code is returned.

ERRORS

Bq Er ENOMEM

The buffer was not large enough to hold the vnode's component name.

Bq Er ENOENT

The vnode was not found on the file system.

SEE ALSO

VOP_LOOKUP9, vnode(9)

NOTES

This interface is a work in progress.

HISTORY

The function appeared in Fx 8.0 .

AUTHORS

This manual page was written by An Joe Marcus Clarke .