freebsd man page for vfs_suser

VFS_SUSER(9)						   BSD Kernel Developer's Manual					      VFS_SUSER(9)

NAME
     vfs_suser -- check if credentials have superuser privileges for a mount point

SYNOPSIS
     #include <sys/param.h>
     #include <sys/systm.h>
     #include <sys/mount.h>

     int
     vfs_suser(struct mount *mp, struct thread *td);

DESCRIPTION
     The vfs_suser() function checks if the credentials given include superuser powers for the given mount point.  It will check to see if the
     thread passed in has the same credentials as the user that mounted the file system.  If so, it returns 0, otherwise it returns what
     priv_check(9) would have returned.

RETURN VALUES
     The vfs_suser() function returns 0 if the user has superuser powers and EPERM otherwise.  This is the reverse logic of some other implementa-
     tions of suser() in which a TRUE response indicates superuser powers.

SEE ALSO
     chroot(2), jail(2)

HISTORY
     The vfs_suser() function was introduced in FreeBSD 5.2.

AUTHORS
     This manual page was written by Alfred Perlstein.

BSD
								   April 2, 2004							       BSD