4.4BSD/usr/src/sys/news3400/newsos/news_compat.c
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)news_compat.c 8.1 (Berkeley) 6/11/93
*
* from: $Hdr: sun_misc.c,v 1.12 92/07/12 13:26:10 torek Exp $
*/
/*
* NEWS-OS compatibility module.
*
* NEWS-OS system calls that are implemented differently in BSD are
* handled here.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/resource.h>
#include <sys/resourcevar.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <sys/socket.h>
#include <sys/vnode.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <miscfs/specfs/specdev.h>
#include <vm/vm.h>
#if 0
/* here is the sun layout (not used directly): */
struct sun_dirent {
long d_off;
u_long d_fileno;
u_short d_reclen;
u_short d_namlen;
char d_name[256];
};
#endif
/* and the BSD layout: */
struct bsd_dirent {
u_long d_fileno;
u_short d_reclen;
u_short d_namlen;
char d_name[256];
};
/*
* Read Sun-style directory entries. We suck them into kernel space so
* that they can be massaged before being copied out to user code. Like
* SunOS, we squish out `empty' entries.
*
* This is quite ugly, but what do you expect from compatibility code?
*/
struct sun_getdents_args {
int fd;
char *buf;
int nbytes;
};
sun_getdents(p, uap, retval)
struct proc *p;
register struct sun_getdents_args *uap;
int *retval;
{
register struct vnode *vp;
register caddr_t inp, buf; /* BSD-format */
register int len, reclen; /* BSD-format */
register caddr_t outp; /* Sun-format */
register int resid; /* Sun-format */
struct file *fp;
struct uio auio;
struct iovec aiov;
off_t off; /* true file offset */
long soff; /* Sun file offset */
int buflen, error, eofflag;
#define SUN_RECLEN(reclen) (reclen + sizeof(long))
if ((error = getvnode(p->p_fd, uap->fd, &fp)) != 0)
return (error);
if ((fp->f_flag & FREAD) == 0)
return (EBADF);
vp = (struct vnode *)fp->f_data;
if (vp->v_type != VDIR) /* XXX vnode readdir op should do this */
return (EINVAL);
buflen = min(MAXBSIZE, uap->nbytes);
buf = malloc(buflen, M_TEMP, M_WAITOK);
VOP_LOCK(vp);
off = fp->f_offset;
again:
aiov.iov_base = buf;
aiov.iov_len = buflen;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_rw = UIO_READ;
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_procp = p;
auio.uio_resid = buflen;
auio.uio_offset = off;
/*
* First we read into the malloc'ed buffer, then
* we massage it into user space, one record at a time.
*/
if (error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag))
goto out;
inp = buf;
outp = uap->buf;
resid = uap->nbytes;
if ((len = buflen - auio.uio_resid) == 0)
goto eof;
for (; len > 0; len -= reclen) {
reclen = ((struct bsd_dirent *)inp)->d_reclen;
if (reclen & 3)
panic("sun_getdents");
off += reclen; /* each entry points to next */
if (((struct bsd_dirent *)inp)->d_fileno == 0) {
inp += reclen; /* it is a hole; squish it out */
continue;
}
if (reclen > len || resid < SUN_RECLEN(reclen)) {
/* entry too big for buffer, so just stop */
outp++;
break;
}
/* copy out a Sun-shaped dirent */
((struct bsd_dirent *)inp)->d_reclen = SUN_RECLEN(reclen);
soff = off;
if ((error = copyout((caddr_t)&soff, outp, sizeof soff)) != 0 ||
(error = copyout(inp, outp + sizeof soff, reclen)) != 0)
goto out;
/* advance past this real entry */
inp += reclen;
/* advance output past Sun-shaped entry */
outp += SUN_RECLEN(reclen);
resid -= SUN_RECLEN(reclen);
}
/* if we squished out the whole block, try again */
if (outp == uap->buf)
goto again;
fp->f_offset = off; /* update the vnode offset */
eof:
*retval = uap->nbytes - resid;
out:
VOP_UNLOCK(vp);
free(buf, M_TEMP);
return (error);
}
#define MAXDOMAINNAME 64
char sun_domainname[MAXDOMAINNAME];
int sun_domainnamelen = 1;
struct sun_getdomainname_args {
char *name;
int namelen;
};
sun_getdomainname(p, uap, retval)
struct proc *p;
struct sun_getdomainname_args *uap;
int *retval;
{
register int l = min(uap->namelen, sun_domainnamelen + 1);
return (copyout(sun_domainname, uap->name, l));
}
struct sun_setdomainname_args {
char *name;
int namelen;
};
sun_setdomainname(p, uap, retval)
struct proc *p;
struct sun_setdomainname_args *uap;
int *retval;
{
register int l = uap->namelen, error;
if (l >= MAXDOMAINNAME)
return (EINVAL); /* ??? ENAMETOOLONG? */
if (error = suser(p->p_ucred, &p->p_acflag))
return (error);
if (error = copyin(uap->name, sun_domainname, l))
return (error);
sun_domainname[l] = 0;
return (0);
}
/*
* setenvp system call
*/
struct news_setenvp_args {
char **envp;
};
news_setenvp(p, args, retval)
struct proc *p;
struct news_setenvp_args *args;
int *retval;
{
return (0);
}
/*
* sysnews system call
*/
struct news_sysnews_args {
int ctrltype;
int arg1, arg2, arg3, arg4;
};
news_sysnews(p, args, retval)
struct proc *p;
struct news_sysnews_args *args;
int *retval;
{
return (0);
}