[unix-history] / 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);
}
Commit	Line	Data
46f6d677	1	/*
ad787160 C	2	* Copyright (c) 1992, 1993
ad787160 C	3	* The Regents of the University of California. All rights reserved.
46f6d677 KU	4	*
	5	* This software was developed by the Computer Systems Engineering group
	6	* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
	7	* contributed to Berkeley.
	8	*
ad787160 C	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	* 1. Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	* 2. Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in the
	16	* documentation and/or other materials provided with the distribution.
	17	* 3. All advertising materials mentioning features or use of this software
	18	* must display the following acknowledgement:
	19	* This product includes software developed by the University of
	20	* California, Berkeley and its contributors.
	21	* 4. Neither the name of the University nor the names of its contributors
	22	* may be used to endorse or promote products derived from this software
	23	* without specific prior written permission.
46f6d677	24	*
ad787160 C	25	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	26	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	27	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	28	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	29	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	30	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	31	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	32	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	33	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	34	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	35	* SUCH DAMAGE.
	36	*
	37	* @(#)news_compat.c 8.1 (Berkeley) 6/11/93
46f6d677 KU	38	*
	39	* from: $Hdr: sun_misc.c,v 1.12 92/07/12 13:26:10 torek Exp $
	40	*/
	41
	42	/*
	43	* NEWS-OS compatibility module.
	44	*
	45	* NEWS-OS system calls that are implemented differently in BSD are
	46	* handled here.
	47	*/
	48
	49	#include <sys/param.h>
	50	#include <sys/systm.h>
	51	#include <sys/proc.h>
	52	#include <sys/file.h>
	53	#include <sys/filedesc.h>
	54	#include <sys/ioctl.h>
	55	#include <sys/malloc.h>
	56	#include <sys/mbuf.h>
	57	#include <sys/mman.h>
	58	#include <sys/mount.h>
	59	#include <sys/resource.h>
	60	#include <sys/resourcevar.h>
	61	#include <sys/signal.h>
	62	#include <sys/signalvar.h>
	63	#include <sys/socket.h>
	64	#include <sys/vnode.h>
	65	#include <sys/uio.h>
	66	#include <sys/wait.h>
	67
	68	#include <miscfs/specfs/specdev.h>
	69
	70	#include <vm/vm.h>
	71
	72	#if 0
	73	/* here is the sun layout (not used directly): */
	74	struct sun_dirent {
	75	long d_off;
	76	u_long d_fileno;
	77	u_short d_reclen;
	78	u_short d_namlen;
	79	char d_name[256];
	80	};
	81	#endif
	82	/* and the BSD layout: */
	83	struct bsd_dirent {
	84	u_long d_fileno;
	85	u_short d_reclen;
	86	u_short d_namlen;
	87	char d_name[256];
	88	};
	89
	90	/*
	91	* Read Sun-style directory entries. We suck them into kernel space so
	92	* that they can be massaged before being copied out to user code. Like
	93	* SunOS, we squish out `empty' entries.
	94	*
	95	* This is quite ugly, but what do you expect from compatibility code?
	96	*/
	97	struct sun_getdents_args {
	98	int fd;
	99	char *buf;
	100	int nbytes;
	101	};
102	sun_getdents(p, uap, retval)
103	struct proc *p;
104	register struct sun_getdents_args *uap;
105	int *retval;
106	{
107	register struct vnode *vp;
108	register caddr_t inp, buf; /* BSD-format */
109	register int len, reclen; /* BSD-format */
110	register caddr_t outp; /* Sun-format */
111	register int resid; /* Sun-format */
112	struct file *fp;
113	struct uio auio;
114	struct iovec aiov;
115	off_t off; /* true file offset */
116	long soff; /* Sun file offset */
117	int buflen, error, eofflag;
118	#define SUN_RECLEN(reclen) (reclen + sizeof(long))
119
120	if ((error = getvnode(p->p_fd, uap->fd, &fp)) != 0)
121	return (error);
122	if ((fp->f_flag & FREAD) == 0)
123	return (EBADF);
124	vp = (struct vnode *)fp->f_data;
125	if (vp->v_type != VDIR) /* XXX vnode readdir op should do this */
126	return (EINVAL);
127	buflen = min(MAXBSIZE, uap->nbytes);
128	buf = malloc(buflen, M_TEMP, M_WAITOK);
129	VOP_LOCK(vp);
130	off = fp->f_offset;
131	again:
132	aiov.iov_base = buf;
133	aiov.iov_len = buflen;
134	auio.uio_iov = &aiov;
135	auio.uio_iovcnt = 1;
136	auio.uio_rw = UIO_READ;
137	auio.uio_segflg = UIO_SYSSPACE;
138	auio.uio_procp = p;
139	auio.uio_resid = buflen;
140	auio.uio_offset = off;
141	/*
142	* First we read into the malloc'ed buffer, then
143	* we massage it into user space, one record at a time.
144	*/
145	if (error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag))
146	goto out;
147	inp = buf;
148	outp = uap->buf;
149	resid = uap->nbytes;
150	if ((len = buflen - auio.uio_resid) == 0)
151	goto eof;
152	for (; len > 0; len -= reclen) {
153	reclen = ((struct bsd_dirent *)inp)->d_reclen;
154	if (reclen & 3)
155	panic("sun_getdents");
156	off += reclen; /* each entry points to next */
157	if (((struct bsd_dirent *)inp)->d_fileno == 0) {
158	inp += reclen; /* it is a hole; squish it out */
159	continue;
160	}
161	if (reclen > len \|\| resid < SUN_RECLEN(reclen)) {
162	/* entry too big for buffer, so just stop */
163	outp++;
164	break;
165	}
166	/* copy out a Sun-shaped dirent */
167	((struct bsd_dirent *)inp)->d_reclen = SUN_RECLEN(reclen);
168	soff = off;
169	if ((error = copyout((caddr_t)&soff, outp, sizeof soff)) != 0 \|\|
170	(error = copyout(inp, outp + sizeof soff, reclen)) != 0)
171	goto out;
172	/* advance past this real entry */
173	inp += reclen;
174	/* advance output past Sun-shaped entry */
175	outp += SUN_RECLEN(reclen);
176	resid -= SUN_RECLEN(reclen);
177	}
178	/* if we squished out the whole block, try again */
179	if (outp == uap->buf)
180	goto again;
181	fp->f_offset = off; /* update the vnode offset */
182	eof:
183	*retval = uap->nbytes - resid;
184	out:
185	VOP_UNLOCK(vp);
186	free(buf, M_TEMP);
187	return (error);
188	}
189
190	#define MAXDOMAINNAME 64
191	char sun_domainname[MAXDOMAINNAME];
192	int sun_domainnamelen = 1;
193
194	struct sun_getdomainname_args {
195	char *name;
196	int namelen;
197	};
198	sun_getdomainname(p, uap, retval)
199	struct proc *p;
200	struct sun_getdomainname_args *uap;
201	int *retval;
202	{
203	register int l = min(uap->namelen, sun_domainnamelen + 1);
204
205	return (copyout(sun_domainname, uap->name, l));
206	}
207
208	struct sun_setdomainname_args {
209	char *name;
210	int namelen;
211	};
212	sun_setdomainname(p, uap, retval)
213	struct proc *p;
214	struct sun_setdomainname_args *uap;
215	int *retval;
216	{
217	register int l = uap->namelen, error;
218
219	if (l >= MAXDOMAINNAME)
220	return (EINVAL); /* ??? ENAMETOOLONG? */
221	if (error = suser(p->p_ucred, &p->p_acflag))
222	return (error);
223	if (error = copyin(uap->name, sun_domainname, l))
224	return (error);
225	sun_domainname[l] = 0;
226	return (0);
227	}
228
229	/*
230	* setenvp system call
231	*/
232	struct news_setenvp_args {
233	char **envp;
234	};
235	news_setenvp(p, args, retval)
236	struct proc *p;
237	struct news_setenvp_args *args;
238	int *retval;
239	{
240
241	return (0);
242	}
243
244	/*
245	* sysnews system call
246	*/
247	struct news_sysnews_args {
248	int ctrltype;
249	int arg1, arg2, arg3, arg4;
250	};
251	news_sysnews(p, args, retval)
252	struct proc *p;
253	struct news_sysnews_args *args;
254	int *retval;
255	{
256
257	return (0);
258	}