VOP_GETATTR9freebsd
Get and set attributes on a file or directory
Part of VOP_ATTRIB(9freebsd).
Usage
#include <sys/param.h>
#include <sys/vnode.h>
int
VOP_GETATTR(struct vnode *vp, struct vattr *vap, struct ucred *cred);
int
VOP_SETATTR(struct vnode *vp, struct vattr *vap, struct ucred *cred);
Overview
These entry points manipulate various attributes of a file or directory, including file permissions, owner, group, size, access time and modification time.
The arguments are:
- vp
-
The vnode of the file.
- vap
-
The attributes of the file.
- cred
-
The user credentials of the calling process.
Attributes which are not being modified by VOP_SETATTR() should be set to the value VNOVAL; VATTR_NULL() may be used to clear all the values, and should generally be used to reset the contents of *vap prior to setting specific values.
Locks
VOP_GETATTR() expects the vnode to be locked on entry and will leave the vnode locked on return. The lock type can be either shared or exclusive.
VOP_SETATTR() expects the vnode to be locked on entry and will leave the vnode locked on return. The lock type must be exclusive.
Return values
VOP_GETATTR() returns 0 if it was able to retrieve the attribute data via *vap, otherwise an appropriate error is returned. VOP_SETATTR() returns zero if the attributes were changed successfully, otherwise an appropriate error is returned.
Errors
- [EPERM]
-
The file is immutable.
- [EACCES]
-
The caller does not have permission to modify the file or directory attributes.
- [EROFS]
-
The file system is read-only.
Releases
9 releases since Debian 5.0 (Lenny); the text changed 6 times.