1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1995 Scott Bartram
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD$");
32
33#include "opt_spx_hack.h"
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/capsicum.h>
38#include <sys/fcntl.h>
39#include <sys/file.h>
40#include <sys/filedesc.h>
41#include <sys/lock.h>
42#include <sys/malloc.h>
43#include <sys/mutex.h>
44#include <sys/syscallsubr.h>
45#include <sys/sysproto.h>
46#include <sys/ttycom.h>
47
48#include <i386/ibcs2/ibcs2_fcntl.h>
49#include <i386/ibcs2/ibcs2_signal.h>
50#include <i386/ibcs2/ibcs2_proto.h>
51#include <i386/ibcs2/ibcs2_util.h>
52
53static void cvt_iflock2flock(struct ibcs2_flock *, struct flock *);
54static void cvt_flock2iflock(struct flock *, struct ibcs2_flock *);
55static int  cvt_o_flags(int);
56static int  oflags2ioflags(int);
57static int  ioflags2oflags(int);
58
59static int
60cvt_o_flags(flags)
61	int flags;
62{
63	int r = 0;
64
65        /* convert mode into NetBSD mode */
66	if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
67	if (flags & IBCS2_O_RDWR)   r |= O_RDWR;
68	if (flags & (IBCS2_O_NDELAY | IBCS2_O_NONBLOCK)) r |= O_NONBLOCK;
69	if (flags & IBCS2_O_APPEND) r |= O_APPEND;
70	if (flags & IBCS2_O_SYNC)   r |= O_FSYNC;
71	if (flags & IBCS2_O_CREAT)  r |= O_CREAT;
72	if (flags & IBCS2_O_TRUNC)  r |= O_TRUNC /* | O_CREAT ??? */;
73	if (flags & IBCS2_O_EXCL)   r |= O_EXCL;
74	if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
75	if (flags & IBCS2_O_PRIV)   r |= O_EXLOCK;
76	if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
77	return r;
78}
79
80static void
81cvt_flock2iflock(flp, iflp)
82	struct flock *flp;
83	struct ibcs2_flock *iflp;
84{
85	switch (flp->l_type) {
86	case F_RDLCK:
87		iflp->l_type = IBCS2_F_RDLCK;
88		break;
89	case F_WRLCK:
90		iflp->l_type = IBCS2_F_WRLCK;
91		break;
92	case F_UNLCK:
93		iflp->l_type = IBCS2_F_UNLCK;
94		break;
95	}
96	iflp->l_whence = (short)flp->l_whence;
97	iflp->l_start = (ibcs2_off_t)flp->l_start;
98	iflp->l_len = (ibcs2_off_t)flp->l_len;
99	iflp->l_sysid = flp->l_sysid;
100	iflp->l_pid = (ibcs2_pid_t)flp->l_pid;
101}
102
103#ifdef DEBUG_IBCS2
104static void
105print_flock(struct flock *flp)
106{
107  printf("flock: start=%x len=%x pid=%d type=%d whence=%d\n",
108	 (int)flp->l_start, (int)flp->l_len, (int)flp->l_pid,
109	 flp->l_type, flp->l_whence);
110}
111#endif
112
113static void
114cvt_iflock2flock(iflp, flp)
115	struct ibcs2_flock *iflp;
116	struct flock *flp;
117{
118	flp->l_start = (off_t)iflp->l_start;
119	flp->l_len = (off_t)iflp->l_len;
120	flp->l_pid = (pid_t)iflp->l_pid;
121	switch (iflp->l_type) {
122	case IBCS2_F_RDLCK:
123		flp->l_type = F_RDLCK;
124		break;
125	case IBCS2_F_WRLCK:
126		flp->l_type = F_WRLCK;
127		break;
128	case IBCS2_F_UNLCK:
129		flp->l_type = F_UNLCK;
130		break;
131	}
132	flp->l_whence = iflp->l_whence;
133	flp->l_sysid = iflp->l_sysid;
134}
135
136/* convert iBCS2 mode into NetBSD mode */
137static int
138ioflags2oflags(flags)
139	int flags;
140{
141	int r = 0;
142
143	if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
144	if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
145	if (flags & IBCS2_O_RDWR) r |= O_RDWR;
146	if (flags & IBCS2_O_NDELAY) r |= O_NONBLOCK;
147	if (flags & IBCS2_O_APPEND) r |= O_APPEND;
148	if (flags & IBCS2_O_SYNC) r |= O_FSYNC;
149	if (flags & IBCS2_O_NONBLOCK) r |= O_NONBLOCK;
150	if (flags & IBCS2_O_CREAT) r |= O_CREAT;
151	if (flags & IBCS2_O_TRUNC) r |= O_TRUNC;
152	if (flags & IBCS2_O_EXCL) r |= O_EXCL;
153	if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
154	return r;
155}
156
157/* convert NetBSD mode into iBCS2 mode */
158static int
159oflags2ioflags(flags)
160	int flags;
161{
162	int r = 0;
163
164	if (flags & O_RDONLY) r |= IBCS2_O_RDONLY;
165	if (flags & O_WRONLY) r |= IBCS2_O_WRONLY;
166	if (flags & O_RDWR) r |= IBCS2_O_RDWR;
167	if (flags & O_NDELAY) r |= IBCS2_O_NONBLOCK;
168	if (flags & O_APPEND) r |= IBCS2_O_APPEND;
169	if (flags & O_FSYNC) r |= IBCS2_O_SYNC;
170	if (flags & O_NONBLOCK) r |= IBCS2_O_NONBLOCK;
171	if (flags & O_CREAT) r |= IBCS2_O_CREAT;
172	if (flags & O_TRUNC) r |= IBCS2_O_TRUNC;
173	if (flags & O_EXCL) r |= IBCS2_O_EXCL;
174	if (flags & O_NOCTTY) r |= IBCS2_O_NOCTTY;
175	return r;
176}
177
178int
179ibcs2_open(td, uap)
180	struct thread *td;
181	struct ibcs2_open_args *uap;
182{
183	struct proc *p;
184	char *path;
185	int flags, noctty, ret;
186
187	p = td->td_proc;
188	noctty = uap->flags & IBCS2_O_NOCTTY;
189	flags = cvt_o_flags(uap->flags);
190	if (uap->flags & O_CREAT)
191		CHECKALTCREAT(td, uap->path, &path);
192	else
193		CHECKALTEXIST(td, uap->path, &path);
194	ret = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE, flags, uap->mode);
195
196#ifdef SPX_HACK
197	if (ret == ENXIO) {
198		if (!strcmp(path, "/compat/ibcs2/dev/spx"))
199			ret = spx_open(td);
200		free(path, M_TEMP);
201	} else
202#endif /* SPX_HACK */
203	free(path, M_TEMP);
204	PROC_LOCK(p);
205	if (!ret && !noctty && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
206		cap_rights_t rights;
207		struct file *fp;
208		int error;
209
210		error = fget(td, td->td_retval[0],
211		    cap_rights_init(&rights, CAP_IOCTL), &fp);
212		PROC_UNLOCK(p);
213		if (error)
214			return (EBADF);
215
216		/* ignore any error, just give it a try */
217		if (fp->f_type == DTYPE_VNODE)
218			fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0, td->td_ucred,
219			    td);
220		fdrop(fp, td);
221	} else
222		PROC_UNLOCK(p);
223	return ret;
224}
225
226int
227ibcs2_creat(td, uap)
228        struct thread *td;
229	struct ibcs2_creat_args *uap;
230{
231	char *path;
232	int error;
233
234	CHECKALTCREAT(td, uap->path, &path);
235	error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE,
236	    O_WRONLY | O_CREAT | O_TRUNC, uap->mode);
237	free(path, M_TEMP);
238	return (error);
239}
240
241int
242ibcs2_access(td, uap)
243        struct thread *td;
244        struct ibcs2_access_args *uap;
245{
246	char *path;
247	int error;
248
249        CHECKALTEXIST(td, uap->path, &path);
250	error = kern_accessat(td, AT_FDCWD, path, UIO_SYSSPACE, 0, uap->amode);
251	free(path, M_TEMP);
252	return (error);
253}
254
255int
256ibcs2_fcntl(td, uap)
257	struct thread *td;
258	struct ibcs2_fcntl_args *uap;
259{
260	intptr_t arg;
261	int error;
262	struct flock fl;
263	struct ibcs2_flock ifl;
264
265	arg = (intptr_t)uap->arg;
266	switch(uap->cmd) {
267	case IBCS2_F_DUPFD:
268		return (kern_fcntl(td, uap->fd, F_DUPFD, arg));
269	case IBCS2_F_GETFD:
270		return (kern_fcntl(td, uap->fd, F_GETFD, arg));
271	case IBCS2_F_SETFD:
272		return (kern_fcntl(td, uap->fd, F_SETFD, arg));
273	case IBCS2_F_GETFL:
274		error = kern_fcntl(td, uap->fd, F_GETFL, arg);
275		if (error)
276			return error;
277		td->td_retval[0] = oflags2ioflags(td->td_retval[0]);
278		return error;
279	case IBCS2_F_SETFL:
280		return (kern_fcntl(td, uap->fd, F_SETFL,
281		    ioflags2oflags(arg)));
282
283	case IBCS2_F_GETLK:
284	    {
285		error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
286			       ibcs2_flock_len);
287		if (error)
288			return error;
289		cvt_iflock2flock(&ifl, &fl);
290		error = kern_fcntl(td, uap->fd, F_GETLK, (intptr_t)&fl);
291		if (error)
292			return error;
293		cvt_flock2iflock(&fl, &ifl);
294		return copyout((caddr_t)&ifl, (caddr_t)uap->arg,
295			       ibcs2_flock_len);
296	    }
297
298	case IBCS2_F_SETLK:
299	    {
300		error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
301			       ibcs2_flock_len);
302		if (error)
303			return error;
304		cvt_iflock2flock(&ifl, &fl);
305		return (kern_fcntl(td, uap->fd, F_SETLK, (intptr_t)&fl));
306	    }
307
308	case IBCS2_F_SETLKW:
309	    {
310		error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
311			       ibcs2_flock_len);
312		if (error)
313			return error;
314		cvt_iflock2flock(&ifl, &fl);
315		return (kern_fcntl(td, uap->fd, F_SETLKW, (intptr_t)&fl));
316	    }
317	}
318	return ENOSYS;
319}
320