VFS_SUSER(9) BSD Kernel Developer's Manual VFS_SUSER(9)NAMEvfs_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 supe‐
ruser 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 ALSOchroot(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