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 implementations 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.

Debian                                            April 2, 2004                                     VFS_SUSER(9)