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 in

clude 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

suser(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 pow

ers.

SEE ALSO

chroot(2), jail(2), suser(9)

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