1 /* $NetBSD: osf1_file.c,v 1.43 2014/09/05 09:21:54 matt Exp $ */
2
3 /*
4 * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Christopher G. Demetriou
17 * for the NetBSD Project.
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
35 * All rights reserved.
36 *
37 * Author: Chris G. Demetriou
38 *
39 * Permission to use, copy, modify and distribute this software and
40 * its documentation is hereby granted, provided that both the copyright
41 * notice and this permission notice appear in all copies of the
42 * software, derivative works or modified versions, and any portions
43 * thereof, and that both notices appear in supporting documentation.
44 *
45 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
46 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
47 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
48 *
49 * Carnegie Mellon requests users of this software to return to
50 *
51 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
52 * School of Computer Science
53 * Carnegie Mellon University
54 * Pittsburgh PA 15213-3890
55 *
56 * any improvements or extensions that they make and grant Carnegie the
57 * rights to redistribute these changes.
58 */
59
60 #include <sys/cdefs.h>
61 __KERNEL_RCSID(0, "$NetBSD: osf1_file.c,v 1.43 2014/09/05 09:21:54 matt Exp $");
62
63 #if defined(_KERNEL_OPT)
64 #include "opt_syscall_debug.h"
65 #endif
66
67 #include <sys/param.h>
68 #include <sys/systm.h>
69 #include <sys/namei.h>
70 #include <sys/proc.h>
71 #include <sys/file.h>
72 #include <sys/stat.h>
73 #include <sys/filedesc.h>
74 #include <sys/kernel.h>
75 #include <sys/malloc.h>
76 #include <sys/mman.h>
77 #include <sys/mount.h>
78 #include <sys/signal.h>
79 #include <sys/signalvar.h>
80 #include <sys/reboot.h>
81 #include <sys/syscallargs.h>
82 #include <sys/exec.h>
83 #include <sys/vnode.h>
84 #include <sys/socketvar.h>
85 #include <sys/resource.h>
86 #include <sys/resourcevar.h>
87 #include <sys/wait.h>
88 #include <sys/vfs_syscalls.h>
89 #include <sys/dirent.h>
90
91 #include <compat/osf1/osf1.h>
92 #include <compat/osf1/osf1_syscallargs.h>
93 #include <compat/common/compat_util.h>
94 #include <compat/osf1/osf1_cvt.h>
95 #include <compat/osf1/osf1_dirent.h>
96
97 #ifdef SYSCALL_DEBUG
98 extern int scdebug;
99 #endif
100
101 int
osf1_sys_access(struct lwp * l,const struct osf1_sys_access_args * uap,register_t * retval)102 osf1_sys_access(struct lwp *l, const struct osf1_sys_access_args *uap, register_t *retval)
103 {
104 struct sys_access_args a;
105 unsigned long leftovers;
106
107 SCARG(&a, path) = SCARG(uap, path);
108
109 /* translate flags */
110 SCARG(&a, flags) = emul_flags_translate(osf1_access_flags_xtab,
111 SCARG(uap, flags), &leftovers);
112 if (leftovers != 0)
113 return (EINVAL);
114
115 return sys_access(l, &a, retval);
116 }
117
118 int
osf1_sys_execve(struct lwp * l,const struct osf1_sys_execve_args * uap,register_t * retval)119 osf1_sys_execve(struct lwp *l, const struct osf1_sys_execve_args *uap, register_t *retval)
120 {
121 struct sys_execve_args ap;
122
123 SCARG(&ap, path) = SCARG(uap, path);
124 SCARG(&ap, argp) = SCARG(uap, argp);
125 SCARG(&ap, envp) = SCARG(uap, envp);
126
127 return sys_execve(l, &ap, retval);
128 }
129
130 int
osf1_sys_getdirentries(struct lwp * l,const struct osf1_sys_getdirentries_args * uap,register_t * retval)131 osf1_sys_getdirentries(struct lwp *l, const struct osf1_sys_getdirentries_args *uap, register_t *retval)
132 {
133 /* {
134 syscallarg(int) fd;
135 syscallarg(char *) buf;
136 syscallarg(int) nbytes;
137 syscallarg(long *) basep;
138 } */
139 struct dirent *bdp;
140 struct vnode *vp;
141 char *inp, *buf; /* BSD-format */
142 int len, reclen; /* BSD-format */
143 char *outp; /* OSF1-format */
144 int resid, osf1_reclen; /* OSF1-format */
145 struct file *fp;
146 struct uio auio;
147 struct iovec aiov;
148 struct osf1_dirent idb;
149 off_t off, off1; /* true file offset */
150 int buflen, error, eofflag;
151 off_t *cookiebuf = NULL, *cookie;
152 int ncookies, fd;
153
154 if (SCARG(uap, nbytes) < 0)
155 return EINVAL;
156 if (SCARG(uap, nbytes) == 0)
157 return 0;
158
159 fd = SCARG(uap, fd);
160 if ((error = fd_getvnode(fd, &fp)) != 0)
161 return (error);
162 if ((fp->f_flag & FREAD) == 0) {
163 error = EBADF;
164 goto out1;
165 }
166
167 vp = fp->f_vnode;
168 if (vp->v_type != VDIR) {
169 error = EINVAL;
170 goto out1;
171 }
172
173 buflen = min(MAXBSIZE, SCARG(uap, nbytes));
174 buf = kmem_alloc(buflen, KM_SLEEP);
175 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
176 off = off1 = fp->f_offset;
177 again:
178 aiov.iov_base = buf;
179 aiov.iov_len = buflen;
180 auio.uio_iov = &aiov;
181 auio.uio_iovcnt = 1;
182 auio.uio_rw = UIO_READ;
183 auio.uio_resid = buflen;
184 auio.uio_offset = off;
185 UIO_SETUP_SYSSPACE(&auio);
186 /*
187 * First we read into the allocated buffer, then
188 * we massage it into user space, one record at a time.
189 */
190 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf,
191 &ncookies);
192 if (error)
193 goto out;
194
195 inp = buf;
196 outp = (char *)SCARG(uap, buf);
197 resid = SCARG(uap, nbytes);
198 if ((len = buflen - auio.uio_resid) == 0)
199 goto eof;
200
201 for (cookie = cookiebuf; len > 0; len -= reclen) {
202 bdp = (struct dirent *)inp;
203 reclen = bdp->d_reclen;
204 if (reclen & 3)
205 panic("osf1_sys_getdirentries: bad reclen");
206 if (cookie)
207 off = *cookie++; /* each entry points to the next */
208 else
209 off += reclen;
210 if ((off >> 32) != 0) {
211 compat_offseterr(vp, "osf1_sys_getdirentries");
212 error = EINVAL;
213 goto out;
214 }
215 if (bdp->d_fileno == 0) {
216 inp += reclen; /* it is a hole; squish it out */
217 continue;
218 }
219 osf1_reclen = OSF1_RECLEN(&idb, bdp->d_namlen);
220 if (reclen > len || resid < osf1_reclen) {
221 /* entry too big for buffer, so just stop */
222 outp++;
223 break;
224 }
225 /*
226 * Massage in place to make a OSF1-shaped dirent (otherwise
227 * we have to worry about touching user memory outside of
228 * the copyout() call).
229 */
230 idb.d_ino = (osf1_ino_t)bdp->d_fileno;
231 idb.d_reclen = (u_short)osf1_reclen;
232 idb.d_namlen = (u_short)bdp->d_namlen;
233 strlcpy(idb.d_name, bdp->d_name, sizeof(idb.d_name));
234 if ((error = copyout((void *)&idb, outp, osf1_reclen)))
235 goto out;
236 /* advance past this real entry */
237 inp += reclen;
238 /* advance output past OSF1-shaped entry */
239 outp += osf1_reclen;
240 resid -= osf1_reclen;
241 }
242
243 /* if we squished out the whole block, try again */
244 if (outp == (char *)SCARG(uap, buf)) {
245 if (cookiebuf)
246 free(cookiebuf, M_TEMP);
247 cookiebuf = NULL;
248 goto again;
249 }
250 fp->f_offset = off; /* update the vnode offset */
251
252 eof:
253 *retval = SCARG(uap, nbytes) - resid;
254 out:
255 VOP_UNLOCK(vp);
256 if (cookiebuf)
257 free(cookiebuf, M_TEMP);
258 kmem_free(buf, buflen);
259 if (SCARG(uap, basep) != NULL)
260 error = copyout(&off1, SCARG(uap, basep), sizeof(long));
261 out1:
262 fd_putfile(fd);
263 return error;
264 }
265
266 /*
267 * Get file status; this version does not follow links.
268 */
269 /* ARGSUSED */
270 int
osf1_sys_lstat(struct lwp * l,const struct osf1_sys_lstat_args * uap,register_t * retval)271 osf1_sys_lstat(struct lwp *l, const struct osf1_sys_lstat_args *uap, register_t *retval)
272 {
273 struct stat sb;
274 struct osf1_stat osb;
275 int error;
276
277 error = do_sys_stat(SCARG(uap, path), NOFOLLOW, &sb);
278 if (error)
279 return (error);
280 osf1_cvt_stat_from_native(&sb, &osb);
281 error = copyout(&osb, SCARG(uap, ub), sizeof (osb));
282 return (error);
283 }
284
285 /*
286 * Get file status; this version does not follow links.
287 */
288 /* ARGSUSED */
289 int
osf1_sys_lstat2(struct lwp * l,const struct osf1_sys_lstat2_args * uap,register_t * retval)290 osf1_sys_lstat2(struct lwp *l, const struct osf1_sys_lstat2_args *uap, register_t *retval)
291 {
292 struct stat sb;
293 struct osf1_stat2 osb;
294 int error;
295
296 error = do_sys_stat(SCARG(uap, path), NOFOLLOW, &sb);
297 if (error)
298 return (error);
299 osf1_cvt_stat2_from_native(&sb, &osb);
300 error = copyout((void *)&osb, (void *)SCARG(uap, ub), sizeof (osb));
301 return (error);
302 }
303
304 int
osf1_sys_mknod(struct lwp * l,const struct osf1_sys_mknod_args * uap,register_t * retval)305 osf1_sys_mknod(struct lwp *l, const struct osf1_sys_mknod_args *uap, register_t *retval)
306 {
307
308 return do_sys_mknod(l, SCARG(uap, path), SCARG(uap, mode),
309 osf1_cvt_dev_to_native(SCARG(uap, dev)), retval, UIO_USERSPACE);
310 }
311
312 int
osf1_sys_open(struct lwp * l,const struct osf1_sys_open_args * uap,register_t * retval)313 osf1_sys_open(struct lwp *l, const struct osf1_sys_open_args *uap, register_t *retval)
314 {
315 struct sys_open_args a;
316 const char *path;
317 unsigned long leftovers;
318 #ifdef SYSCALL_DEBUG
319 char pnbuf[1024];
320
321 if (scdebug &&
322 copyinstr(SCARG(uap, path), pnbuf, sizeof pnbuf, NULL) == 0)
323 printf("osf1_open: open: %s\n", pnbuf);
324 #endif
325
326 /* translate flags */
327 SCARG(&a, flags) = emul_flags_translate(osf1_open_flags_xtab,
328 SCARG(uap, flags), &leftovers);
329 if (leftovers != 0)
330 return (EINVAL);
331
332 /* copy mode, no translation necessary */
333 SCARG(&a, mode) = SCARG(uap, mode);
334
335 /* pick appropriate path */
336 path = SCARG(uap, path);
337 SCARG(&a, path) = path;
338
339 return sys_open(l, &a, retval);
340 }
341
342 int
osf1_sys_pathconf(struct lwp * l,const struct osf1_sys_pathconf_args * uap,register_t * retval)343 osf1_sys_pathconf(struct lwp *l, const struct osf1_sys_pathconf_args *uap, register_t *retval)
344 {
345 struct sys_pathconf_args a;
346 int error;
347
348 SCARG(&a, path) = SCARG(uap, path);
349
350 error = osf1_cvt_pathconf_name_to_native(SCARG(uap, name),
351 &SCARG(&a, name));
352
353 if (error == 0)
354 error = sys_pathconf(l, &a, retval);
355
356 return (error);
357 }
358
359 /*
360 * Get file status; this version follows links.
361 */
362 /* ARGSUSED */
363 int
osf1_sys_stat(struct lwp * l,const struct osf1_sys_stat_args * uap,register_t * retval)364 osf1_sys_stat(struct lwp *l, const struct osf1_sys_stat_args *uap, register_t *retval)
365 {
366 struct stat sb;
367 struct osf1_stat osb;
368 int error;
369
370 error = do_sys_stat(SCARG(uap, path), FOLLOW, &sb);
371 if (error)
372 return (error);
373 osf1_cvt_stat_from_native(&sb, &osb);
374 error = copyout((void *)&osb, (void *)SCARG(uap, ub), sizeof (osb));
375 return (error);
376 }
377
378 /*
379 * Get file status; this version follows links.
380 */
381 /* ARGSUSED */
382 int
osf1_sys_stat2(struct lwp * l,const struct osf1_sys_stat2_args * uap,register_t * retval)383 osf1_sys_stat2(struct lwp *l, const struct osf1_sys_stat2_args *uap, register_t *retval)
384 {
385 struct stat sb;
386 struct osf1_stat2 osb;
387 int error;
388
389 error = do_sys_stat(SCARG(uap, path), FOLLOW, &sb);
390 if (error)
391 return (error);
392 osf1_cvt_stat2_from_native(&sb, &osb);
393 error = copyout((void *)&osb, (void *)SCARG(uap, ub), sizeof (osb));
394 return (error);
395 }
396
397 int
osf1_sys_truncate(struct lwp * l,const struct osf1_sys_truncate_args * uap,register_t * retval)398 osf1_sys_truncate(struct lwp *l, const struct osf1_sys_truncate_args *uap, register_t *retval)
399 {
400 struct sys_truncate_args a;
401
402 SCARG(&a, path) = SCARG(uap, path);
403 SCARG(&a, PAD) = 0;
404 SCARG(&a, length) = SCARG(uap, length);
405
406 return sys_truncate(l, &a, retval);
407 }
408
409 int
osf1_sys_utimes(struct lwp * l,const struct osf1_sys_utimes_args * uap,register_t * retval)410 osf1_sys_utimes(struct lwp *l, const struct osf1_sys_utimes_args *uap, register_t *retval)
411 {
412 struct osf1_timeval otv;
413 struct timeval tv[2], *tvp;
414 int error;
415
416 if (SCARG(uap, tptr) == NULL)
417 tvp = NULL;
418 else {
419 /* get the OSF/1 timeval argument */
420 error = copyin(SCARG(uap, tptr), &otv, sizeof otv);
421 if (error != 0)
422 return error;
423
424 /* fill in and copy out the NetBSD timeval */
425 tv[0].tv_sec = otv.tv_sec;
426 tv[0].tv_usec = otv.tv_usec;
427 /* Set access and modified to the same time */
428 tv[1].tv_sec = otv.tv_sec;
429 tv[1].tv_usec = otv.tv_usec;
430 tvp = tv;
431 }
432
433 return do_sys_utimes(l, NULL, SCARG(uap, path), FOLLOW,
434 tvp, UIO_SYSSPACE);
435 }
436