linux_file.c revision 1.60
1 /* $NetBSD: linux_file.c,v 1.60 2003/06/29 14:51:28 jdolecek Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Functions in multiarch: 41 * linux_sys_llseek : linux_llseek.c 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: linux_file.c,v 1.60 2003/06/29 14:51:28 jdolecek Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/namei.h> 50 #include <sys/proc.h> 51 #include <sys/file.h> 52 #include <sys/stat.h> 53 #include <sys/filedesc.h> 54 #include <sys/ioctl.h> 55 #include <sys/kernel.h> 56 #include <sys/mount.h> 57 #include <sys/malloc.h> 58 #include <sys/vnode.h> 59 #include <sys/tty.h> 60 #include <sys/socketvar.h> 61 #include <sys/conf.h> 62 #include <sys/pipe.h> 63 64 #include <sys/sa.h> 65 #include <sys/syscallargs.h> 66 67 #include <compat/linux/common/linux_types.h> 68 #include <compat/linux/common/linux_signal.h> 69 #include <compat/linux/common/linux_fcntl.h> 70 #include <compat/linux/common/linux_util.h> 71 #include <compat/linux/common/linux_machdep.h> 72 73 #include <compat/linux/linux_syscallargs.h> 74 75 static int linux_to_bsd_ioflags __P((int)); 76 static int bsd_to_linux_ioflags __P((int)); 77 static void bsd_to_linux_flock __P((struct flock *, struct linux_flock *)); 78 static void linux_to_bsd_flock __P((struct linux_flock *, struct flock *)); 79 static void bsd_to_linux_stat __P((struct stat *, struct linux_stat *)); 80 static int linux_stat1 __P((struct lwp *, void *, register_t *, int)); 81 82 /* 83 * Some file-related calls are handled here. The usual flag conversion 84 * an structure conversion is done, and alternate emul path searching. 85 */ 86 87 /* 88 * The next two functions convert between the Linux and NetBSD values 89 * of the flags used in open(2) and fcntl(2). 90 */ 91 static int 92 linux_to_bsd_ioflags(lflags) 93 int lflags; 94 { 95 int res = 0; 96 97 res |= cvtto_bsd_mask(lflags, LINUX_O_WRONLY, O_WRONLY); 98 res |= cvtto_bsd_mask(lflags, LINUX_O_RDONLY, O_RDONLY); 99 res |= cvtto_bsd_mask(lflags, LINUX_O_RDWR, O_RDWR); 100 res |= cvtto_bsd_mask(lflags, LINUX_O_CREAT, O_CREAT); 101 res |= cvtto_bsd_mask(lflags, LINUX_O_EXCL, O_EXCL); 102 res |= cvtto_bsd_mask(lflags, LINUX_O_NOCTTY, O_NOCTTY); 103 res |= cvtto_bsd_mask(lflags, LINUX_O_TRUNC, O_TRUNC); 104 res |= cvtto_bsd_mask(lflags, LINUX_O_NDELAY, O_NDELAY); 105 res |= cvtto_bsd_mask(lflags, LINUX_O_SYNC, O_FSYNC); 106 res |= cvtto_bsd_mask(lflags, LINUX_FASYNC, O_ASYNC); 107 res |= cvtto_bsd_mask(lflags, LINUX_O_APPEND, O_APPEND); 108 109 return res; 110 } 111 112 static int 113 bsd_to_linux_ioflags(bflags) 114 int bflags; 115 { 116 int res = 0; 117 118 res |= cvtto_linux_mask(bflags, O_WRONLY, LINUX_O_WRONLY); 119 res |= cvtto_linux_mask(bflags, O_RDONLY, LINUX_O_RDONLY); 120 res |= cvtto_linux_mask(bflags, O_RDWR, LINUX_O_RDWR); 121 res |= cvtto_linux_mask(bflags, O_CREAT, LINUX_O_CREAT); 122 res |= cvtto_linux_mask(bflags, O_EXCL, LINUX_O_EXCL); 123 res |= cvtto_linux_mask(bflags, O_NOCTTY, LINUX_O_NOCTTY); 124 res |= cvtto_linux_mask(bflags, O_TRUNC, LINUX_O_TRUNC); 125 res |= cvtto_linux_mask(bflags, O_NDELAY, LINUX_O_NDELAY); 126 res |= cvtto_linux_mask(bflags, O_FSYNC, LINUX_O_SYNC); 127 res |= cvtto_linux_mask(bflags, O_ASYNC, LINUX_FASYNC); 128 res |= cvtto_linux_mask(bflags, O_APPEND, LINUX_O_APPEND); 129 130 return res; 131 } 132 133 /* 134 * creat(2) is an obsolete function, but it's present as a Linux 135 * system call, so let's deal with it. 136 * 137 * Note: On the Alpha this doesn't really exist in Linux, but it's defined 138 * in syscalls.master anyway so this doesn't have to be special cased. 139 * 140 * Just call open(2) with the TRUNC, CREAT and WRONLY flags. 141 */ 142 int 143 linux_sys_creat(l, v, retval) 144 struct lwp *l; 145 void *v; 146 register_t *retval; 147 { 148 struct linux_sys_creat_args /* { 149 syscallarg(const char *) path; 150 syscallarg(int) mode; 151 } */ *uap = v; 152 struct proc *p = l->l_proc; 153 struct sys_open_args oa; 154 caddr_t sg; 155 156 sg = stackgap_init(p, 0); 157 CHECK_ALT_CREAT(l, &sg, SCARG(uap, path)); 158 159 SCARG(&oa, path) = SCARG(uap, path); 160 SCARG(&oa, flags) = O_CREAT | O_TRUNC | O_WRONLY; 161 SCARG(&oa, mode) = SCARG(uap, mode); 162 163 return sys_open(l, &oa, retval); 164 } 165 166 /* 167 * open(2). Take care of the different flag values, and let the 168 * NetBSD syscall do the real work. See if this operation 169 * gives the current process a controlling terminal. 170 * (XXX is this necessary?) 171 */ 172 int 173 linux_sys_open(l, v, retval) 174 struct lwp *l; 175 void *v; 176 register_t *retval; 177 { 178 struct linux_sys_open_args /* { 179 syscallarg(const char *) path; 180 syscallarg(int) flags; 181 syscallarg(int) mode; 182 } */ *uap = v; 183 struct proc *p = l->l_proc; 184 int error, fl; 185 struct sys_open_args boa; 186 caddr_t sg; 187 188 sg = stackgap_init(p, 0); 189 190 fl = linux_to_bsd_ioflags(SCARG(uap, flags)); 191 192 if (fl & O_CREAT) 193 CHECK_ALT_CREAT(l, &sg, SCARG(uap, path)); 194 else 195 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 196 197 SCARG(&boa, path) = SCARG(uap, path); 198 SCARG(&boa, flags) = fl; 199 SCARG(&boa, mode) = SCARG(uap, mode); 200 201 if ((error = sys_open(l, &boa, retval))) 202 return error; 203 204 /* 205 * this bit from sunos_misc.c (and svr4_fcntl.c). 206 * If we are a session leader, and we don't have a controlling 207 * terminal yet, and the O_NOCTTY flag is not set, try to make 208 * this the controlling terminal. 209 */ 210 if (!(fl & O_NOCTTY) && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) { 211 struct filedesc *fdp = p->p_fd; 212 struct file *fp; 213 214 fp = fd_getfile(fdp, *retval); 215 216 /* ignore any error, just give it a try */ 217 if (fp != NULL) { 218 FILE_USE(fp); 219 if (fp->f_type == DTYPE_VNODE) { 220 (fp->f_ops->fo_ioctl) (fp, TIOCSCTTY, 221 (caddr_t) 0, l); 222 } 223 FILE_UNUSE(fp, l); 224 } 225 } 226 return 0; 227 } 228 229 /* 230 * The next two functions take care of converting the flock 231 * structure back and forth between Linux and NetBSD format. 232 * The only difference in the structures is the order of 233 * the fields, and the 'whence' value. 234 */ 235 static void 236 bsd_to_linux_flock(bfp, lfp) 237 struct flock *bfp; 238 struct linux_flock *lfp; 239 { 240 241 lfp->l_start = bfp->l_start; 242 lfp->l_len = bfp->l_len; 243 lfp->l_pid = bfp->l_pid; 244 lfp->l_whence = bfp->l_whence; 245 switch (bfp->l_type) { 246 case F_RDLCK: 247 lfp->l_type = LINUX_F_RDLCK; 248 break; 249 case F_UNLCK: 250 lfp->l_type = LINUX_F_UNLCK; 251 break; 252 case F_WRLCK: 253 lfp->l_type = LINUX_F_WRLCK; 254 break; 255 } 256 } 257 258 static void 259 linux_to_bsd_flock(lfp, bfp) 260 struct linux_flock *lfp; 261 struct flock *bfp; 262 { 263 264 bfp->l_start = lfp->l_start; 265 bfp->l_len = lfp->l_len; 266 bfp->l_pid = lfp->l_pid; 267 bfp->l_whence = lfp->l_whence; 268 switch (lfp->l_type) { 269 case LINUX_F_RDLCK: 270 bfp->l_type = F_RDLCK; 271 break; 272 case LINUX_F_UNLCK: 273 bfp->l_type = F_UNLCK; 274 break; 275 case LINUX_F_WRLCK: 276 bfp->l_type = F_WRLCK; 277 break; 278 } 279 } 280 281 /* 282 * Most actions in the fcntl() call are straightforward; simply 283 * pass control to the NetBSD system call. A few commands need 284 * conversions after the actual system call has done its work, 285 * because the flag values and lock structure are different. 286 */ 287 int 288 linux_sys_fcntl(l, v, retval) 289 struct lwp *l; 290 void *v; 291 register_t *retval; 292 { 293 struct linux_sys_fcntl_args /* { 294 syscallarg(int) fd; 295 syscallarg(int) cmd; 296 syscallarg(void *) arg; 297 } */ *uap = v; 298 struct proc *p = l->l_proc; 299 int fd, cmd, error; 300 u_long val; 301 caddr_t arg, sg; 302 struct linux_flock lfl; 303 struct flock *bfp, bfl; 304 struct sys_fcntl_args fca; 305 struct filedesc *fdp; 306 struct file *fp; 307 struct vnode *vp; 308 struct vattr va; 309 const struct cdevsw *cdev; 310 long pgid; 311 struct pgrp *pgrp; 312 struct tty *tp, *(*d_tty) __P((dev_t)); 313 314 fd = SCARG(uap, fd); 315 cmd = SCARG(uap, cmd); 316 arg = (caddr_t) SCARG(uap, arg); 317 318 switch (cmd) { 319 case LINUX_F_DUPFD: 320 cmd = F_DUPFD; 321 break; 322 case LINUX_F_GETFD: 323 cmd = F_GETFD; 324 break; 325 case LINUX_F_SETFD: 326 cmd = F_SETFD; 327 break; 328 case LINUX_F_GETFL: 329 SCARG(&fca, fd) = fd; 330 SCARG(&fca, cmd) = F_GETFL; 331 SCARG(&fca, arg) = arg; 332 if ((error = sys_fcntl(l, &fca, retval))) 333 return error; 334 retval[0] = bsd_to_linux_ioflags(retval[0]); 335 return 0; 336 case LINUX_F_SETFL: { 337 struct file *fp = NULL; 338 339 val = linux_to_bsd_ioflags((unsigned long)SCARG(uap, arg)); 340 /* 341 * Linux seems to have same semantics for sending SIGIO to the 342 * read side of socket, but slighly different semantics 343 * for SIGIO to the write side. Rather than sending the SIGIO 344 * every time it's possible to write (directly) more data, it 345 * only sends SIGIO if last write(2) failed due to insufficient 346 * memory to hold the data. This is compatible enough 347 * with NetBSD semantics to not do anything about the 348 * difference. 349 * 350 * Linux does NOT send SIGIO for pipes. Deal with socketpair 351 * ones and DTYPE_PIPE ones. For these, we don't set 352 * the underlying flags (we don't pass O_ASYNC flag down 353 * to sys_fcntl()), but set the FASYNC flag for file descriptor, 354 * so that F_GETFL would report the ASYNC i/o is on. 355 */ 356 if (val & O_ASYNC) { 357 if (((fp = fd_getfile(p->p_fd, fd)) == NULL)) 358 return (EBADF); 359 360 FILE_USE(fp); 361 362 if (((fp->f_type == DTYPE_SOCKET) && fp->f_data 363 && ((struct socket *)fp->f_data)->so_state & SS_ISAPIPE) 364 || (fp->f_type == DTYPE_PIPE)) 365 val &= ~O_ASYNC; 366 else { 367 /* not a pipe, do not modify anything */ 368 FILE_UNUSE(fp, l); 369 fp = NULL; 370 } 371 } 372 373 SCARG(&fca, fd) = fd; 374 SCARG(&fca, cmd) = F_SETFL; 375 SCARG(&fca, arg) = (caddr_t) val; 376 377 error = sys_fcntl(l, &fca, retval); 378 379 /* Now set the FASYNC flag for pipes */ 380 if (fp) { 381 if (!error) 382 fp->f_flag |= FASYNC; 383 FILE_UNUSE(fp, l); 384 } 385 386 return (error); 387 } 388 case LINUX_F_GETLK: 389 sg = stackgap_init(p, 0); 390 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 391 if ((error = copyin(arg, &lfl, sizeof lfl))) 392 return error; 393 linux_to_bsd_flock(&lfl, &bfl); 394 if ((error = copyout(&bfl, bfp, sizeof bfl))) 395 return error; 396 SCARG(&fca, fd) = fd; 397 SCARG(&fca, cmd) = F_GETLK; 398 SCARG(&fca, arg) = bfp; 399 if ((error = sys_fcntl(l, &fca, retval))) 400 return error; 401 if ((error = copyin(bfp, &bfl, sizeof bfl))) 402 return error; 403 bsd_to_linux_flock(&bfl, &lfl); 404 return copyout(&lfl, arg, sizeof lfl); 405 406 case LINUX_F_SETLK: 407 case LINUX_F_SETLKW: 408 cmd = (cmd == LINUX_F_SETLK ? F_SETLK : F_SETLKW); 409 if ((error = copyin(arg, &lfl, sizeof lfl))) 410 return error; 411 linux_to_bsd_flock(&lfl, &bfl); 412 sg = stackgap_init(p, 0); 413 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 414 if ((error = copyout(&bfl, bfp, sizeof bfl))) 415 return error; 416 arg = (caddr_t)bfp; 417 break; 418 419 case LINUX_F_SETOWN: 420 case LINUX_F_GETOWN: 421 /* 422 * We need to route fcntl() for tty descriptors around normal 423 * fcntl(), since NetBSD tty TIOC{G,S}PGRP semantics is too 424 * restrictive for Linux F_{G,S}ETOWN. For non-tty descriptors, 425 * this is not a problem. 426 */ 427 fdp = p->p_fd; 428 if ((fp = fd_getfile(fdp, fd)) == NULL) 429 return EBADF; 430 FILE_USE(fp); 431 432 /* Check it's a character device vnode */ 433 if (fp->f_type != DTYPE_VNODE 434 || (vp = (struct vnode *)fp->f_data) == NULL 435 || vp->v_type != VCHR) { 436 FILE_UNUSE(fp, l); 437 438 not_tty: 439 /* Not a tty, proceed with common fcntl() */ 440 cmd = cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN; 441 break; 442 } 443 444 /* check that the vnode is a tty */ 445 error = VOP_GETATTR(vp, &va, p->p_ucred, l); 446 447 FILE_UNUSE(fp, l); /* Don't need anymore */ 448 449 if (error) 450 return error; 451 452 cdev = cdevsw_lookup(va.va_rdev); 453 if (cdev == NULL) 454 return (ENXIO); 455 d_tty = cdev->d_tty; 456 if (!d_tty || (!(tp = (*d_tty)(va.va_rdev)))) 457 goto not_tty; 458 459 /* set tty pg_id appropriately */ 460 if (cmd == LINUX_F_GETOWN) { 461 retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 462 return 0; 463 } 464 if ((long)arg <= 0) { 465 pgid = -(long)arg; 466 } else { 467 struct proc *p1 = pfind((long)arg); 468 if (p1 == NULL) 469 return (ESRCH); 470 pgid = (long)p1->p_pgrp->pg_id; 471 } 472 pgrp = pgfind(pgid); 473 if (pgrp == NULL || pgrp->pg_session != p->p_session) 474 return EPERM; 475 tp->t_pgrp = pgrp; 476 return 0; 477 478 default: 479 return EOPNOTSUPP; 480 } 481 482 SCARG(&fca, fd) = fd; 483 SCARG(&fca, cmd) = cmd; 484 SCARG(&fca, arg) = arg; 485 486 return sys_fcntl(l, &fca, retval); 487 } 488 489 /* 490 * Convert a NetBSD stat structure to a Linux stat structure. 491 * Only the order of the fields and the padding in the structure 492 * is different. linux_fakedev is a machine-dependent function 493 * which optionally converts device driver major/minor numbers 494 * (XXX horrible, but what can you do against code that compares 495 * things against constant major device numbers? sigh) 496 */ 497 static void 498 bsd_to_linux_stat(bsp, lsp) 499 struct stat *bsp; 500 struct linux_stat *lsp; 501 { 502 503 lsp->lst_dev = linux_fakedev(bsp->st_dev, 0); 504 lsp->lst_ino = bsp->st_ino; 505 lsp->lst_mode = (linux_mode_t)bsp->st_mode; 506 if (bsp->st_nlink >= (1 << 15)) 507 lsp->lst_nlink = (1 << 15) - 1; 508 else 509 lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; 510 lsp->lst_uid = bsp->st_uid; 511 lsp->lst_gid = bsp->st_gid; 512 lsp->lst_rdev = linux_fakedev(bsp->st_rdev, 1); 513 lsp->lst_size = bsp->st_size; 514 lsp->lst_blksize = bsp->st_blksize; 515 lsp->lst_blocks = bsp->st_blocks; 516 lsp->lst_atime = bsp->st_atime; 517 lsp->lst_mtime = bsp->st_mtime; 518 lsp->lst_ctime = bsp->st_ctime; 519 } 520 521 /* 522 * The stat functions below are plain sailing. stat and lstat are handled 523 * by one function to avoid code duplication. 524 */ 525 int 526 linux_sys_fstat(l, v, retval) 527 struct lwp *l; 528 void *v; 529 register_t *retval; 530 { 531 struct linux_sys_fstat_args /* { 532 syscallarg(int) fd; 533 syscallarg(linux_stat *) sp; 534 } */ *uap = v; 535 struct proc *p = l->l_proc; 536 struct sys___fstat13_args fsa; 537 struct linux_stat tmplst; 538 struct stat *st,tmpst; 539 caddr_t sg; 540 int error; 541 542 sg = stackgap_init(p, 0); 543 544 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 545 546 SCARG(&fsa, fd) = SCARG(uap, fd); 547 SCARG(&fsa, sb) = st; 548 549 if ((error = sys___fstat13(l, &fsa, retval))) 550 return error; 551 552 if ((error = copyin(st, &tmpst, sizeof tmpst))) 553 return error; 554 555 bsd_to_linux_stat(&tmpst, &tmplst); 556 557 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 558 return error; 559 560 return 0; 561 } 562 563 static int 564 linux_stat1(l, v, retval, dolstat) 565 struct lwp *l; 566 void *v; 567 register_t *retval; 568 int dolstat; 569 { 570 struct sys___stat13_args sa; 571 struct linux_stat tmplst; 572 struct stat *st, tmpst; 573 struct proc *p = l->l_proc; 574 caddr_t sg; 575 int error; 576 struct linux_sys_stat_args *uap = v; 577 578 sg = stackgap_init(p, 0); 579 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 580 if (dolstat) 581 CHECK_ALT_SYMLINK(l, &sg, SCARG(uap, path)); 582 else 583 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 584 585 SCARG(&sa, ub) = st; 586 SCARG(&sa, path) = SCARG(uap, path); 587 588 if ((error = (dolstat ? sys___lstat13(l, &sa, retval) : 589 sys___stat13(l, &sa, retval)))) 590 return error; 591 592 if ((error = copyin(st, &tmpst, sizeof tmpst))) 593 return error; 594 595 bsd_to_linux_stat(&tmpst, &tmplst); 596 597 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 598 return error; 599 600 return 0; 601 } 602 603 int 604 linux_sys_stat(l, v, retval) 605 struct lwp *l; 606 void *v; 607 register_t *retval; 608 { 609 struct linux_sys_stat_args /* { 610 syscallarg(const char *) path; 611 syscallarg(struct linux_stat *) sp; 612 } */ *uap = v; 613 614 return linux_stat1(l, uap, retval, 0); 615 } 616 617 /* Note: this is "newlstat" in the Linux sources */ 618 /* (we don't bother with the old lstat currently) */ 619 int 620 linux_sys_lstat(l, v, retval) 621 struct lwp *l; 622 void *v; 623 register_t *retval; 624 { 625 struct linux_sys_lstat_args /* { 626 syscallarg(const char *) path; 627 syscallarg(struct linux_stat *) sp; 628 } */ *uap = v; 629 630 return linux_stat1(l, uap, retval, 1); 631 } 632 633 /* 634 * The following syscalls are mostly here because of the alternate path check. 635 */ 636 int 637 linux_sys_access(l, v, retval) 638 struct lwp *l; 639 void *v; 640 register_t *retval; 641 { 642 struct linux_sys_access_args /* { 643 syscallarg(const char *) path; 644 syscallarg(int) flags; 645 } */ *uap = v; 646 struct proc *p = l->l_proc; 647 caddr_t sg = stackgap_init(p, 0); 648 649 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 650 651 return sys_access(l, uap, retval); 652 } 653 654 int 655 linux_sys_unlink(l, v, retval) 656 struct lwp *l; 657 void *v; 658 register_t *retval; 659 660 { 661 struct linux_sys_unlink_args /* { 662 syscallarg(const char *) path; 663 } */ *uap = v; 664 struct proc *p = l->l_proc; 665 caddr_t sg = stackgap_init(p, 0); 666 667 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 668 669 return sys_unlink(l, uap, retval); 670 } 671 672 int 673 linux_sys_chdir(l, v, retval) 674 struct lwp *l; 675 void *v; 676 register_t *retval; 677 { 678 struct linux_sys_chdir_args /* { 679 syscallarg(const char *) path; 680 } */ *uap = v; 681 struct proc *p = l->l_proc; 682 caddr_t sg = stackgap_init(p, 0); 683 684 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 685 686 return sys_chdir(l, uap, retval); 687 } 688 689 int 690 linux_sys_mknod(l, v, retval) 691 struct lwp *l; 692 void *v; 693 register_t *retval; 694 { 695 struct linux_sys_mknod_args /* { 696 syscallarg(const char *) path; 697 syscallarg(int) mode; 698 syscallarg(int) dev; 699 } */ *uap = v; 700 struct proc *p = l->l_proc; 701 caddr_t sg = stackgap_init(p, 0); 702 703 CHECK_ALT_CREAT(l, &sg, SCARG(uap, path)); 704 705 /* 706 * BSD handles FIFOs separately 707 */ 708 if (SCARG(uap, mode) & S_IFIFO) { 709 struct sys_mkfifo_args bma; 710 711 SCARG(&bma, path) = SCARG(uap, path); 712 SCARG(&bma, mode) = SCARG(uap, mode); 713 return sys_mkfifo(l, &bma, retval); 714 } else { 715 struct sys_mknod_args bma; 716 717 SCARG(&bma, path) = SCARG(uap, path); 718 SCARG(&bma, mode) = SCARG(uap, mode); 719 /* 720 * Linux device numbers uses 8 bits for minor and 8 bits 721 * for major. Due to how we map our major and minor, 722 * this just fints into our dev_t. Just mask off the 723 * upper 16bit to remove any random junk. 724 */ 725 SCARG(&bma, dev) = SCARG(uap, dev) & 0xffff; 726 return sys_mknod(l, &bma, retval); 727 } 728 } 729 730 int 731 linux_sys_chmod(l, v, retval) 732 struct lwp *l; 733 void *v; 734 register_t *retval; 735 { 736 struct linux_sys_chmod_args /* { 737 syscallarg(const char *) path; 738 syscallarg(int) mode; 739 } */ *uap = v; 740 struct proc *p = l->l_proc; 741 caddr_t sg = stackgap_init(p, 0); 742 743 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 744 745 return sys_chmod(l, uap, retval); 746 } 747 748 #if defined(__i386__) || defined(__m68k__) || defined(__arm__) 749 int 750 linux_sys_chown16(l, v, retval) 751 struct lwp *l; 752 void *v; 753 register_t *retval; 754 { 755 struct linux_sys_chown16_args /* { 756 syscallarg(const char *) path; 757 syscallarg(int) uid; 758 syscallarg(int) gid; 759 } */ *uap = v; 760 struct proc *p = l->l_proc; 761 struct sys___posix_chown_args bca; 762 caddr_t sg = stackgap_init(p, 0); 763 764 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 765 766 SCARG(&bca, path) = SCARG(uap, path); 767 SCARG(&bca, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 768 (uid_t)-1 : SCARG(uap, uid); 769 SCARG(&bca, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 770 (gid_t)-1 : SCARG(uap, gid); 771 772 return sys___posix_chown(l, &bca, retval); 773 } 774 775 int 776 linux_sys_fchown16(l, v, retval) 777 struct lwp *l; 778 void *v; 779 register_t *retval; 780 { 781 struct linux_sys_fchown16_args /* { 782 syscallarg(int) fd; 783 syscallarg(int) uid; 784 syscallarg(int) gid; 785 } */ *uap = v; 786 struct sys___posix_fchown_args bfa; 787 788 SCARG(&bfa, fd) = SCARG(uap, fd); 789 SCARG(&bfa, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 790 (uid_t)-1 : SCARG(uap, uid); 791 SCARG(&bfa, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 792 (gid_t)-1 : SCARG(uap, gid); 793 794 return sys___posix_fchown(l, &bfa, retval); 795 } 796 797 int 798 linux_sys_lchown16(l, v, retval) 799 struct lwp *l; 800 void *v; 801 register_t *retval; 802 { 803 struct linux_sys_lchown16_args /* { 804 syscallarg(char *) path; 805 syscallarg(int) uid; 806 syscallarg(int) gid; 807 } */ *uap = v; 808 struct proc *p = l->l_proc; 809 struct sys___posix_lchown_args bla; 810 caddr_t sg = stackgap_init(p, 0); 811 812 CHECK_ALT_SYMLINK(l, &sg, SCARG(uap, path)); 813 814 SCARG(&bla, path) = SCARG(uap, path); 815 SCARG(&bla, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 816 (uid_t)-1 : SCARG(uap, uid); 817 SCARG(&bla, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 818 (gid_t)-1 : SCARG(uap, gid); 819 820 return sys___posix_lchown(l, &bla, retval); 821 } 822 #endif /* __i386__ || __m68k__ || __arm__ */ 823 #if defined (__i386__) || defined (__m68k__) || \ 824 defined (__powerpc__) || defined (__mips__) || defined(__arm__) 825 int 826 linux_sys_chown(l, v, retval) 827 struct lwp *l; 828 void *v; 829 register_t *retval; 830 { 831 struct linux_sys_chown_args /* { 832 syscallarg(char *) path; 833 syscallarg(int) uid; 834 syscallarg(int) gid; 835 } */ *uap = v; 836 struct proc *p = l->l_proc; 837 caddr_t sg = stackgap_init(p, 0); 838 839 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 840 841 return sys___posix_chown(l, uap, retval); 842 } 843 844 int 845 linux_sys_lchown(l, v, retval) 846 struct lwp *l; 847 void *v; 848 register_t *retval; 849 { 850 struct linux_sys_lchown_args /* { 851 syscallarg(char *) path; 852 syscallarg(int) uid; 853 syscallarg(int) gid; 854 } */ *uap = v; 855 struct proc *p = l->l_proc; 856 caddr_t sg = stackgap_init(p, 0); 857 858 CHECK_ALT_SYMLINK(l, &sg, SCARG(uap, path)); 859 860 return sys___posix_lchown(l, uap, retval); 861 } 862 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 863 864 int 865 linux_sys_rename(l, v, retval) 866 struct lwp *l; 867 void *v; 868 register_t *retval; 869 { 870 struct linux_sys_rename_args /* { 871 syscallarg(const char *) from; 872 syscallarg(const char *) to; 873 } */ *uap = v; 874 struct proc *p = l->l_proc; 875 caddr_t sg = stackgap_init(p, 0); 876 877 CHECK_ALT_EXIST(l, &sg, SCARG(uap, from)); 878 CHECK_ALT_CREAT(l, &sg, SCARG(uap, to)); 879 880 return sys___posix_rename(l, uap, retval); 881 } 882 883 int 884 linux_sys_mkdir(l, v, retval) 885 struct lwp *l; 886 void *v; 887 register_t *retval; 888 { 889 struct linux_sys_mkdir_args /* { 890 syscallarg(const char *) path; 891 syscallarg(int) mode; 892 } */ *uap = v; 893 struct proc *p = l->l_proc; 894 caddr_t sg = stackgap_init(p, 0); 895 896 CHECK_ALT_CREAT(l, &sg, SCARG(uap, path)); 897 898 return sys_mkdir(l, uap, retval); 899 } 900 901 int 902 linux_sys_rmdir(l, v, retval) 903 struct lwp *l; 904 void *v; 905 register_t *retval; 906 { 907 struct linux_sys_rmdir_args /* { 908 syscallarg(const char *) path; 909 } */ *uap = v; 910 struct proc *p = l->l_proc; 911 caddr_t sg = stackgap_init(p, 0); 912 913 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 914 915 return sys_rmdir(l, uap, retval); 916 } 917 918 int 919 linux_sys_symlink(l, v, retval) 920 struct lwp *l; 921 void *v; 922 register_t *retval; 923 { 924 struct linux_sys_symlink_args /* { 925 syscallarg(const char *) path; 926 syscallarg(const char *) to; 927 } */ *uap = v; 928 struct proc *p = l->l_proc; 929 caddr_t sg = stackgap_init(p, 0); 930 931 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 932 CHECK_ALT_CREAT(l, &sg, SCARG(uap, to)); 933 934 return sys_symlink(l, uap, retval); 935 } 936 937 int 938 linux_sys_link(l, v, retval) 939 struct lwp *l; 940 void *v; 941 register_t *retval; 942 { 943 struct linux_sys_link_args /* { 944 syscallarg(const char *) path; 945 syscallarg(const char *) link; 946 } */ *uap = v; 947 struct proc *p = l->l_proc; 948 caddr_t sg = stackgap_init(p, 0); 949 950 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 951 CHECK_ALT_CREAT(l, &sg, SCARG(uap, link)); 952 953 return sys_link(l, uap, retval); 954 } 955 956 int 957 linux_sys_readlink(l, v, retval) 958 struct lwp *l; 959 void *v; 960 register_t *retval; 961 { 962 struct linux_sys_readlink_args /* { 963 syscallarg(const char *) name; 964 syscallarg(char *) buf; 965 syscallarg(int) count; 966 } */ *uap = v; 967 struct proc *p = l->l_proc; 968 caddr_t sg = stackgap_init(p, 0); 969 970 CHECK_ALT_SYMLINK(l, &sg, SCARG(uap, name)); 971 972 return sys_readlink(l, uap, retval); 973 } 974 975 int 976 linux_sys_truncate(l, v, retval) 977 struct lwp *l; 978 void *v; 979 register_t *retval; 980 { 981 struct linux_sys_truncate_args /* { 982 syscallarg(const char *) path; 983 syscallarg(long) length; 984 } */ *uap = v; 985 struct proc *p = l->l_proc; 986 caddr_t sg = stackgap_init(p, 0); 987 988 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 989 990 return compat_43_sys_truncate(l, uap, retval); 991 } 992 993 /* 994 * This is just fsync() for now (just as it is in the Linux kernel) 995 * Note: this is not implemented under Linux on Alpha and Arm 996 * but should still be defined in our syscalls.master. 997 * (syscall #148 on the arm) 998 */ 999 int 1000 linux_sys_fdatasync(l, v, retval) 1001 struct lwp *l; 1002 void *v; 1003 register_t *retval; 1004 { 1005 #ifdef notdef 1006 struct linux_sys_fdatasync_args /* { 1007 syscallarg(int) fd; 1008 } */ *uap = v; 1009 #endif 1010 return sys_fsync(l, v, retval); 1011 } 1012 1013 /* 1014 * pread(2). 1015 */ 1016 int 1017 linux_sys_pread(l, v, retval) 1018 struct lwp *l; 1019 void *v; 1020 register_t *retval; 1021 { 1022 struct linux_sys_pread_args /* { 1023 syscallarg(int) fd; 1024 syscallarg(void *) buf; 1025 syscallarg(size_t) nbyte; 1026 syscallarg(linux_off_t) offset; 1027 } */ *uap = v; 1028 struct sys_pread_args pra; 1029 1030 SCARG(&pra, fd) = SCARG(uap, fd); 1031 SCARG(&pra, buf) = SCARG(uap, buf); 1032 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 1033 SCARG(&pra, offset) = SCARG(uap, offset); 1034 1035 return sys_read(l, &pra, retval); 1036 } 1037 1038 /* 1039 * pwrite(2). 1040 */ 1041 int 1042 linux_sys_pwrite(l, v, retval) 1043 struct lwp *l; 1044 void *v; 1045 register_t *retval; 1046 { 1047 struct linux_sys_pwrite_args /* { 1048 syscallarg(int) fd; 1049 syscallarg(void *) buf; 1050 syscallarg(size_t) nbyte; 1051 syscallarg(linux_off_t) offset; 1052 } */ *uap = v; 1053 struct sys_pwrite_args pra; 1054 1055 SCARG(&pra, fd) = SCARG(uap, fd); 1056 SCARG(&pra, buf) = SCARG(uap, buf); 1057 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 1058 SCARG(&pra, offset) = SCARG(uap, offset); 1059 1060 return sys_write(l, &pra, retval); 1061 } 1062
Indexes created Thu Sep 25 16:09:42 GMT 2025