don't allow process to attach to itself

[unix-history] / usr / src / sys / kern / kern_xxx.c

/*
* Copyright (c) 1982, 1986, 1989 Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*
*      @(#)kern_xxx.c  7.20 (Berkeley) %G%
*/

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/reboot.h>

char    hostname[MAXHOSTNAMELEN];
int     hostnamelen;
long    hostid;

struct gethostid_args {
       int     dummy;
};
/* ARGSUSED */
gethostid(p, uap, retval)
       struct proc *p;
       struct gethostid_args *uap;
       int *retval;
{

       *(long *)retval = hostid;
       return (0);
}

struct sethostid_args {
       long    hostid;
};
/* ARGSUSED */
sethostid(p, uap, retval)
       struct proc *p;
       struct sethostid_args *uap;
       int *retval;
{
       int error;

}

struct gethostname_args {
       char    *hostname;
       u_int   len;
};
/* ARGSUSED */
gethostname(p, uap, retval)
       struct proc *p;
       struct gethostname_args *uap;
       int *retval;
{

       if (uap->len > hostnamelen + 1)
               uap->len = hostnamelen + 1;
       return (copyout((caddr_t)hostname, (caddr_t)uap->hostname, uap->len));
}

struct sethostname_args {
       char    *hostname;
       u_int   len;
};
/* ARGSUSED */
sethostname(p, uap, retval)
       struct proc *p;
       register struct sethostname_args *uap;
       int *retval;
{
       int error;

       if (error = suser(p->p_ucred, &p->p_acflag))
               return (error);
       if (uap->len > sizeof (hostname) - 1)
               return (EINVAL);
       hostnamelen = uap->len;
       error = copyin((caddr_t)uap->hostname, hostname, uap->len);
       hostname[hostnamelen] = 0;
       return (error);
}

struct reboot_args {
       int     opt;
};
/* ARGSUSED */
reboot(p, uap, retval)
       struct proc *p;
       struct reboot_args *uap;
       int *retval;
{
       int error;

}

#ifdef COMPAT_43
oquota()
{

       return (ENOSYS);
}
#endif