Provided by: freebsd-manpages_12.0-1_all
VOP_GETATTR, VOP_SETATTR — get and set attributes on a file or directory
#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);
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.
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.
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.
[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.
VFS(9), vnode(9), VOP_ACCESS(9)
This manual page was written by Doug Rabson.