netbsd32_fs.c revision 1.43
1 /* $NetBSD: netbsd32_fs.c,v 1.43 2007/05/12 17:28:19 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2001 Matthew R. Green 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, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: netbsd32_fs.c,v 1.43 2007/05/12 17:28:19 dsl Exp $"); 33 34 #if defined(_KERNEL_OPT) 35 #include "opt_ktrace.h" 36 #endif 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/malloc.h> 41 #include <sys/mount.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/stat.h> 45 #include <sys/time.h> 46 #include <sys/ktrace.h> 47 #include <sys/resourcevar.h> 48 #include <sys/vnode.h> 49 #include <sys/file.h> 50 #include <sys/filedesc.h> 51 #include <sys/namei.h> 52 #include <sys/statvfs.h> 53 #include <sys/syscallargs.h> 54 #include <sys/proc.h> 55 #include <sys/dirent.h> 56 #include <sys/kauth.h> 57 #include <sys/vfs_syscalls.h> 58 59 #include <compat/netbsd32/netbsd32.h> 60 #include <compat/netbsd32/netbsd32_syscallargs.h> 61 #include <compat/netbsd32/netbsd32_conv.h> 62 #include <compat/sys/mount.h> 63 64 65 static int dofilereadv32 __P((struct lwp *, int, struct file *, struct netbsd32_iovec *, 66 int, off_t *, int, register_t *)); 67 static int dofilewritev32 __P((struct lwp *, int, struct file *, struct netbsd32_iovec *, 68 int, off_t *, int, register_t *)); 69 70 int 71 netbsd32_readv(l, v, retval) 72 struct lwp *l; 73 void *v; 74 register_t *retval; 75 { 76 struct netbsd32_readv_args /* { 77 syscallarg(int) fd; 78 syscallarg(const netbsd32_iovecp_t) iovp; 79 syscallarg(int) iovcnt; 80 } */ *uap = v; 81 int fd = SCARG(uap, fd); 82 struct proc *p = l->l_proc; 83 struct file *fp; 84 struct filedesc *fdp = p->p_fd; 85 86 if ((fp = fd_getfile(fdp, fd)) == NULL) 87 return (EBADF); 88 89 if ((fp->f_flag & FREAD) == 0) 90 return (EBADF); 91 92 FILE_USE(fp); 93 94 return (dofilereadv32(l, fd, fp, 95 (struct netbsd32_iovec *)SCARG_P32(uap, iovp), 96 SCARG(uap, iovcnt), &fp->f_offset, FOF_UPDATE_OFFSET, retval)); 97 } 98 99 /* Damn thing copies in the iovec! */ 100 int 101 dofilereadv32(l, fd, fp, iovp, iovcnt, offset, flags, retval) 102 struct lwp *l; 103 int fd; 104 struct file *fp; 105 struct netbsd32_iovec *iovp; 106 int iovcnt; 107 off_t *offset; 108 int flags; 109 register_t *retval; 110 { 111 struct uio auio; 112 struct iovec *iov; 113 struct iovec *needfree; 114 struct iovec aiov[UIO_SMALLIOV]; 115 long i, cnt, error = 0; 116 u_int iovlen; 117 #ifdef KTRACE 118 struct iovec *ktriov = NULL; 119 #endif 120 121 /* note: can't use iovlen until iovcnt is validated */ 122 iovlen = iovcnt * sizeof(struct iovec); 123 if ((u_int)iovcnt > UIO_SMALLIOV) { 124 if ((u_int)iovcnt > IOV_MAX) { 125 error = EINVAL; 126 goto out; 127 } 128 iov = malloc(iovlen, M_IOV, M_WAITOK); 129 needfree = iov; 130 } else if ((u_int)iovcnt > 0) { 131 iov = aiov; 132 needfree = NULL; 133 } else { 134 error = EINVAL; 135 goto out; 136 } 137 138 auio.uio_iov = iov; 139 auio.uio_iovcnt = iovcnt; 140 auio.uio_rw = UIO_READ; 141 auio.uio_vmspace = l->l_proc->p_vmspace; 142 error = netbsd32_to_iovecin(iovp, iov, iovcnt); 143 if (error) 144 goto done; 145 auio.uio_resid = 0; 146 for (i = 0; i < iovcnt; i++) { 147 auio.uio_resid += iov->iov_len; 148 /* 149 * Reads return ssize_t because -1 is returned on error. 150 * Therefore we must restrict the length to SSIZE_MAX to 151 * avoid garbage return values. 152 */ 153 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) { 154 error = EINVAL; 155 goto done; 156 } 157 iov++; 158 } 159 #ifdef KTRACE 160 /* 161 * if tracing, save a copy of iovec 162 */ 163 if (KTRPOINT(l->l_proc, KTR_GENIO)) { 164 ktriov = malloc(iovlen, M_TEMP, M_WAITOK); 165 memcpy((void *)ktriov, (void *)auio.uio_iov, iovlen); 166 } 167 #endif 168 cnt = auio.uio_resid; 169 error = (*fp->f_ops->fo_read)(fp, offset, &auio, fp->f_cred, flags); 170 if (error) 171 if (auio.uio_resid != cnt && (error == ERESTART || 172 error == EINTR || error == EWOULDBLOCK)) 173 error = 0; 174 cnt -= auio.uio_resid; 175 #ifdef KTRACE 176 if (KTRPOINT(l->l_proc, KTR_GENIO)) 177 if (error == 0) { 178 ktrgenio(l, fd, UIO_READ, ktriov, cnt, 179 error); 180 free(ktriov, M_TEMP); 181 } 182 #endif 183 *retval = cnt; 184 done: 185 if (needfree) 186 free(needfree, M_IOV); 187 out: 188 FILE_UNUSE(fp, l); 189 return (error); 190 } 191 192 int 193 netbsd32_writev(l, v, retval) 194 struct lwp *l; 195 void *v; 196 register_t *retval; 197 { 198 struct netbsd32_writev_args /* { 199 syscallarg(int) fd; 200 syscallarg(const netbsd32_iovecp_t) iovp; 201 syscallarg(int) iovcnt; 202 } */ *uap = v; 203 int fd = SCARG(uap, fd); 204 struct file *fp; 205 struct proc *p = l->l_proc; 206 struct filedesc *fdp = p->p_fd; 207 208 if ((fp = fd_getfile(fdp, fd)) == NULL) 209 return (EBADF); 210 211 if ((fp->f_flag & FWRITE) == 0) 212 return (EBADF); 213 214 FILE_USE(fp); 215 216 return (dofilewritev32(l, fd, fp, 217 (struct netbsd32_iovec *)SCARG_P32(uap, iovp), 218 SCARG(uap, iovcnt), &fp->f_offset, FOF_UPDATE_OFFSET, retval)); 219 } 220 221 int 222 dofilewritev32(l, fd, fp, iovp, iovcnt, offset, flags, retval) 223 struct lwp *l; 224 int fd; 225 struct file *fp; 226 struct netbsd32_iovec *iovp; 227 int iovcnt; 228 off_t *offset; 229 int flags; 230 register_t *retval; 231 { 232 struct uio auio; 233 struct iovec *iov; 234 struct iovec *needfree; 235 struct iovec aiov[UIO_SMALLIOV]; 236 struct proc *p = l->l_proc; 237 long i, cnt, error = 0; 238 u_int iovlen; 239 #ifdef KTRACE 240 struct iovec *ktriov = NULL; 241 #endif 242 243 /* note: can't use iovlen until iovcnt is validated */ 244 iovlen = iovcnt * sizeof(struct iovec); 245 if ((u_int)iovcnt > UIO_SMALLIOV) { 246 if ((u_int)iovcnt > IOV_MAX) { 247 error = EINVAL; 248 goto out; 249 } 250 iov = malloc(iovlen, M_IOV, M_WAITOK); 251 needfree = iov; 252 } else if ((u_int)iovcnt > 0) { 253 iov = aiov; 254 needfree = NULL; 255 } else { 256 error = EINVAL; 257 goto out; 258 } 259 260 auio.uio_iov = iov; 261 auio.uio_iovcnt = iovcnt; 262 auio.uio_rw = UIO_WRITE; 263 auio.uio_vmspace = l->l_proc->p_vmspace; 264 error = netbsd32_to_iovecin(iovp, iov, iovcnt); 265 if (error) 266 goto done; 267 auio.uio_resid = 0; 268 for (i = 0; i < iovcnt; i++) { 269 auio.uio_resid += iov->iov_len; 270 /* 271 * Writes return ssize_t because -1 is returned on error. 272 * Therefore we must restrict the length to SSIZE_MAX to 273 * avoid garbage return values. 274 */ 275 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) { 276 error = EINVAL; 277 goto done; 278 } 279 iov++; 280 } 281 #ifdef KTRACE 282 /* 283 * if tracing, save a copy of iovec 284 */ 285 if (KTRPOINT(p, KTR_GENIO)) { 286 ktriov = malloc(iovlen, M_TEMP, M_WAITOK); 287 memcpy((void *)ktriov, (void *)auio.uio_iov, iovlen); 288 } 289 #endif 290 cnt = auio.uio_resid; 291 error = (*fp->f_ops->fo_write)(fp, offset, &auio, fp->f_cred, flags); 292 if (error) { 293 if (auio.uio_resid != cnt && (error == ERESTART || 294 error == EINTR || error == EWOULDBLOCK)) 295 error = 0; 296 if (error == EPIPE) 297 psignal(p, SIGPIPE); 298 } 299 cnt -= auio.uio_resid; 300 #ifdef KTRACE 301 if (KTRPOINT(p, KTR_GENIO)) 302 if (error == 0) { 303 ktrgenio(l, fd, UIO_WRITE, ktriov, cnt, 304 error); 305 free(ktriov, M_TEMP); 306 } 307 #endif 308 *retval = cnt; 309 done: 310 if (needfree) 311 free(needfree, M_IOV); 312 out: 313 FILE_UNUSE(fp, l); 314 return (error); 315 } 316 317 /* 318 * Common routine to set access and modification times given a vnode. 319 */ 320 static int 321 get_utimes32(const netbsd32_timevalp_t *tptr, struct timeval *tv, 322 struct timeval **tvp) 323 { 324 int error; 325 struct netbsd32_timeval tv32[2]; 326 327 if (tptr == NULL) { 328 *tvp = NULL; 329 return 0; 330 } 331 332 error = copyin(tptr, tv32, sizeof(tv32)); 333 if (error) 334 return error; 335 netbsd32_to_timeval(&tv32[0], &tv[0]); 336 netbsd32_to_timeval(&tv32[1], &tv[1]); 337 338 *tvp = tv; 339 return 0; 340 } 341 342 int 343 netbsd32_utimes(l, v, retval) 344 struct lwp *l; 345 void *v; 346 register_t *retval; 347 { 348 struct netbsd32_utimes_args /* { 349 syscallarg(const netbsd32_charp) path; 350 syscallarg(const netbsd32_timevalp_t) tptr; 351 } */ *uap = v; 352 int error; 353 struct timeval tv[2], *tvp; 354 355 error = get_utimes32(SCARG_P32(uap, tptr), tv, &tvp); 356 if (error != 0) 357 return error; 358 359 return do_sys_utimes(l, NULL, SCARG_P32(uap, path), FOLLOW, 360 tvp, UIO_SYSSPACE); 361 } 362 363 static int 364 netbds32_copyout_statvfs(const void *kp, void *up, size_t len) 365 { 366 struct netbsd32_statvfs *sbuf_32; 367 int error; 368 369 sbuf_32 = malloc(sizeof *sbuf_32, M_TEMP, M_WAITOK); 370 netbsd32_from_statvfs(kp, sbuf_32); 371 error = copyout(sbuf_32, up, sizeof(*sbuf_32)); 372 free(sbuf_32, M_TEMP); 373 374 return error; 375 } 376 377 int 378 netbsd32_statvfs1(l, v, retval) 379 struct lwp *l; 380 void *v; 381 register_t *retval; 382 { 383 struct netbsd32_statvfs1_args /* { 384 syscallarg(const netbsd32_charp) path; 385 syscallarg(netbsd32_statvfsp_t) buf; 386 syscallarg(int) flags; 387 } */ *uap = v; 388 struct statvfs *sb; 389 int error; 390 391 sb = STATVFSBUF_GET(); 392 error = do_sys_pstatvfs(l, SCARG_P32(uap, path), SCARG(uap, flags), sb); 393 if (error == 0) 394 error = netbds32_copyout_statvfs(sb, SCARG_P32(uap, buf), 0); 395 STATVFSBUF_PUT(sb); 396 return error; 397 } 398 399 int 400 netbsd32_fstatvfs1(l, v, retval) 401 struct lwp *l; 402 void *v; 403 register_t *retval; 404 { 405 struct netbsd32_fstatvfs1_args /* { 406 syscallarg(int) fd; 407 syscallarg(netbsd32_statvfsp_t) buf; 408 syscallarg(int) flags; 409 } */ *uap = v; 410 struct statvfs *sb; 411 int error; 412 413 sb = STATVFSBUF_GET(); 414 error = do_sys_fstatvfs(l, SCARG(uap, fd), SCARG(uap, flags), sb); 415 if (error == 0) 416 error = netbds32_copyout_statvfs(sb, SCARG_P32(uap, buf), 0); 417 STATVFSBUF_PUT(sb); 418 return error; 419 } 420 421 int 422 netbsd32_getvfsstat(l, v, retval) 423 struct lwp *l; 424 void *v; 425 register_t *retval; 426 { 427 struct netbsd32_getvfsstat_args /* { 428 syscallarg(netbsd32_statvfsp_t) buf; 429 syscallarg(netbsd32_size_t) bufsize; 430 syscallarg(int) flags; 431 } */ *uap = v; 432 433 return do_sys_getvfsstat(l, SCARG_P32(uap, buf), SCARG(uap, bufsize), 434 SCARG(uap, flags), netbds32_copyout_statvfs, 435 sizeof (struct netbsd32_statvfs), retval); 436 } 437 438 int 439 netbsd32___fhstatvfs140(l, v, retval) 440 struct lwp *l; 441 void *v; 442 register_t *retval; 443 { 444 struct netbsd32___fhstatvfs140_args /* { 445 syscallarg(const netbsd32_pointer_t) fhp; 446 syscallarg(netbsd32_size_t) fh_size; 447 syscallarg(netbsd32_statvfsp_t) buf; 448 syscallarg(int) flags; 449 } */ *uap = v; 450 struct statvfs *sb; 451 int error; 452 453 sb = STATVFSBUF_GET(); 454 error = do_fhstatvfs(l, SCARG_P32(uap, fhp), SCARG(uap, fh_size), sb, 455 SCARG(uap, flags)); 456 457 if (error == 0) 458 error = netbds32_copyout_statvfs(sb, SCARG_P32(uap, buf), 0); 459 STATVFSBUF_PUT(sb); 460 461 return error; 462 } 463 464 int 465 netbsd32_futimes(l, v, retval) 466 struct lwp *l; 467 void *v; 468 register_t *retval; 469 { 470 struct netbsd32_futimes_args /* { 471 syscallarg(int) fd; 472 syscallarg(const netbsd32_timevalp_t) tptr; 473 } */ *uap = v; 474 int error; 475 struct file *fp; 476 struct timeval tv[2], *tvp; 477 478 error = get_utimes32(SCARG_P32(uap, tptr), tv, &tvp); 479 if (error != 0) 480 return error; 481 482 /* getvnode() will use the descriptor for us */ 483 if ((error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp)) != 0) 484 return (error); 485 486 error = do_sys_utimes(l, fp->f_data, NULL, 0, tvp, UIO_SYSSPACE); 487 488 FILE_UNUSE(fp, l); 489 return (error); 490 } 491 492 int 493 netbsd32_sys___getdents30(l, v, retval) 494 struct lwp *l; 495 void *v; 496 register_t *retval; 497 { 498 struct netbsd32_sys___getdents30_args /* { 499 syscallarg(int) fd; 500 syscallarg(netbsd32_charp) buf; 501 syscallarg(netbsd32_size_t) count; 502 } */ *uap = v; 503 struct file *fp; 504 int error, done; 505 struct proc *p = l->l_proc; 506 507 /* getvnode() will use the descriptor for us */ 508 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 509 return (error); 510 if ((fp->f_flag & FREAD) == 0) { 511 error = EBADF; 512 goto out; 513 } 514 error = vn_readdir(fp, SCARG_P32(uap, buf), 515 UIO_USERSPACE, SCARG(uap, count), &done, l, 0, 0); 516 *retval = done; 517 out: 518 FILE_UNUSE(fp, l); 519 return (error); 520 } 521 522 int 523 netbsd32_lutimes(l, v, retval) 524 struct lwp *l; 525 void *v; 526 register_t *retval; 527 { 528 struct netbsd32_lutimes_args /* { 529 syscallarg(const netbsd32_charp) path; 530 syscallarg(const netbsd32_timevalp_t) tptr; 531 } */ *uap = v; 532 int error; 533 struct timeval tv[2], *tvp; 534 535 error = get_utimes32(SCARG_P32(uap, tptr), tv, &tvp); 536 if (error != 0) 537 return error; 538 539 return do_sys_utimes(l, NULL, SCARG_P32(uap, path), NOFOLLOW, 540 tvp, UIO_SYSSPACE); 541 } 542 543 int 544 netbsd32_sys___stat30(l, v, retval) 545 struct lwp *l; 546 void *v; 547 register_t *retval; 548 { 549 struct netbsd32_sys___stat30_args /* { 550 syscallarg(const netbsd32_charp) path; 551 syscallarg(netbsd32_statp_t) ub; 552 } */ *uap = v; 553 struct netbsd32_stat sb32; 554 struct stat sb; 555 int error; 556 const char *path; 557 558 path = SCARG_P32(uap, path); 559 560 error = do_sys_stat(l, path, FOLLOW, &sb); 561 if (error) 562 return (error); 563 netbsd32_from___stat30(&sb, &sb32); 564 error = copyout(&sb32, SCARG_P32(uap, ub), sizeof(sb32)); 565 return (error); 566 } 567 568 int 569 netbsd32_sys___fstat30(l, v, retval) 570 struct lwp *l; 571 void *v; 572 register_t *retval; 573 { 574 struct netbsd32_sys___fstat30_args /* { 575 syscallarg(int) fd; 576 syscallarg(netbsd32_statp_t) sb; 577 } */ *uap = v; 578 int fd = SCARG(uap, fd); 579 struct proc *p = l->l_proc; 580 struct filedesc *fdp = p->p_fd; 581 struct file *fp; 582 struct netbsd32_stat sb32; 583 struct stat ub; 584 int error = 0; 585 586 if ((fp = fd_getfile(fdp, fd)) == NULL) 587 return (EBADF); 588 589 FILE_USE(fp); 590 error = (*fp->f_ops->fo_stat)(fp, &ub, l); 591 FILE_UNUSE(fp, l); 592 593 if (error == 0) { 594 netbsd32_from___stat30(&ub, &sb32); 595 error = copyout(&sb32, SCARG_P32(uap, sb), sizeof(sb32)); 596 } 597 return (error); 598 } 599 600 int 601 netbsd32_sys___lstat30(l, v, retval) 602 struct lwp *l; 603 void *v; 604 register_t *retval; 605 { 606 struct netbsd32_sys___lstat30_args /* { 607 syscallarg(const netbsd32_charp) path; 608 syscallarg(netbsd32_statp_t) ub; 609 } */ *uap = v; 610 struct netbsd32_stat sb32; 611 struct stat sb; 612 int error; 613 const char *path; 614 615 path = SCARG_P32(uap, path); 616 617 error = do_sys_stat(l, path, NOFOLLOW, &sb); 618 if (error) 619 return (error); 620 netbsd32_from___stat30(&sb, &sb32); 621 error = copyout(&sb32, SCARG_P32(uap, ub), sizeof(sb32)); 622 return (error); 623 } 624 625 int netbsd32___fhstat40(l, v, retval) 626 struct lwp *l; 627 void *v; 628 register_t *retval; 629 { 630 struct netbsd32___fhstat40_args /* { 631 syscallarg(const netbsd32_pointer_t) fhp; 632 syscallarg(netbsd32_size_t) fh_size; 633 syscallarg(netbsd32_statp_t) sb; 634 } */ *uap = v; 635 struct stat sb; 636 struct netbsd32_stat sb32; 637 int error; 638 639 error = do_fhstat(l, SCARG_P32(uap, fhp), SCARG(uap, fh_size), &sb); 640 if (error != 0) { 641 netbsd32_from___stat30(&sb, &sb32); 642 error = copyout(&sb32, SCARG_P32(uap, sb), sizeof(sb)); 643 } 644 return error; 645 } 646 647 int 648 netbsd32_preadv(l, v, retval) 649 struct lwp *l; 650 void *v; 651 register_t *retval; 652 { 653 struct netbsd32_preadv_args /* { 654 syscallarg(int) fd; 655 syscallarg(const netbsd32_iovecp_t) iovp; 656 syscallarg(int) iovcnt; 657 syscallarg(int) pad; 658 syscallarg(off_t) offset; 659 } */ *uap = v; 660 struct proc *p = l->l_proc; 661 struct filedesc *fdp = p->p_fd; 662 struct file *fp; 663 struct vnode *vp; 664 off_t offset; 665 int error, fd = SCARG(uap, fd); 666 667 if ((fp = fd_getfile(fdp, fd)) == NULL) 668 return (EBADF); 669 670 if ((fp->f_flag & FREAD) == 0) 671 return (EBADF); 672 673 FILE_USE(fp); 674 675 vp = (struct vnode *)fp->f_data; 676 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 677 error = ESPIPE; 678 goto out; 679 } 680 681 offset = SCARG(uap, offset); 682 683 /* 684 * XXX This works because no file systems actually 685 * XXX take any action on the seek operation. 686 */ 687 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 688 goto out; 689 690 return (dofilereadv32(l, fd, fp, SCARG_P32(uap, iovp), 691 SCARG(uap, iovcnt), &offset, 0, retval)); 692 693 out: 694 FILE_UNUSE(fp, l); 695 return (error); 696 } 697 698 int 699 netbsd32_pwritev(l, v, retval) 700 struct lwp *l; 701 void *v; 702 register_t *retval; 703 { 704 struct netbsd32_pwritev_args /* { 705 syscallarg(int) fd; 706 syscallarg(const netbsd32_iovecp_t) iovp; 707 syscallarg(int) iovcnt; 708 syscallarg(int) pad; 709 syscallarg(off_t) offset; 710 } */ *uap = v; 711 struct proc *p = l->l_proc; 712 struct filedesc *fdp = p->p_fd; 713 struct file *fp; 714 struct vnode *vp; 715 off_t offset; 716 int error, fd = SCARG(uap, fd); 717 718 if ((fp = fd_getfile(fdp, fd)) == NULL) 719 return (EBADF); 720 721 if ((fp->f_flag & FWRITE) == 0) 722 return (EBADF); 723 724 FILE_USE(fp); 725 726 vp = (struct vnode *)fp->f_data; 727 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 728 error = ESPIPE; 729 goto out; 730 } 731 732 offset = SCARG(uap, offset); 733 734 /* 735 * XXX This works because no file systems actually 736 * XXX take any action on the seek operation. 737 */ 738 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 739 goto out; 740 741 return (dofilewritev32(l, fd, fp, SCARG_P32(uap, iovp), 742 SCARG(uap, iovcnt), &offset, 0, retval)); 743 744 out: 745 FILE_UNUSE(fp, l); 746 return (error); 747 } 748 749 /* 750 * Find pathname of process's current directory. 751 * 752 * Use vfs vnode-to-name reverse cache; if that fails, fall back 753 * to reading directory contents. 754 */ 755 /* XXX NH Why does this exist */ 756 int 757 getcwd_common __P((struct vnode *, struct vnode *, 758 char **, char *, int, int, struct lwp *)); 759 760 int netbsd32___getcwd(l, v, retval) 761 struct lwp *l; 762 void *v; 763 register_t *retval; 764 { 765 struct netbsd32___getcwd_args /* { 766 syscallarg(char *) bufp; 767 syscallarg(size_t) length; 768 } */ *uap = v; 769 struct proc *p = l->l_proc; 770 int error; 771 char *path; 772 char *bp, *bend; 773 int len = (int)SCARG(uap, length); 774 int lenused; 775 776 if (len > MAXPATHLEN*4) 777 len = MAXPATHLEN*4; 778 else if (len < 2) 779 return ERANGE; 780 781 path = (char *)malloc(len, M_TEMP, M_WAITOK); 782 if (!path) 783 return ENOMEM; 784 785 bp = &path[len]; 786 bend = bp; 787 *(--bp) = '\0'; 788 789 /* 790 * 5th argument here is "max number of vnodes to traverse". 791 * Since each entry takes up at least 2 bytes in the output buffer, 792 * limit it to N/2 vnodes for an N byte buffer. 793 */ 794 #define GETCWD_CHECK_ACCESS 0x0001 795 error = getcwd_common (p->p_cwdi->cwdi_cdir, NULL, &bp, path, len/2, 796 GETCWD_CHECK_ACCESS, l); 797 798 if (error) 799 goto out; 800 lenused = bend - bp; 801 *retval = lenused; 802 /* put the result into user buffer */ 803 error = copyout(bp, SCARG_P32(uap, bufp), lenused); 804 805 out: 806 free(path, M_TEMP); 807 return error; 808 } 809
Indexes created Mon Sep 22 21:09:42 GMT 2025