oracular (9) vfs_suser.9freebsd.gz

Provided by: freebsd-manpages_12.2-2_all bug

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.