1 /* $NetBSD: linux_file.c,v 1.52 2002/05/13 05:31:42 simonb 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 1.52 2002/05/13 05:31:42 simonb 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/syscallargs.h> 65 66 #include <compat/linux/common/linux_types.h> 67 #include <compat/linux/common/linux_signal.h> 68 #include <compat/linux/common/linux_fcntl.h> 69 #include <compat/linux/common/linux_util.h> 70 #include <compat/linux/common/linux_machdep.h> 71 72 #include <compat/linux/linux_syscallargs.h> 73 74 static int linux_to_bsd_ioflags __P((int)); 75 static int bsd_to_linux_ioflags __P((int)); 76 static void bsd_to_linux_flock __P((struct flock *, struct linux_flock *)); 77 static void linux_to_bsd_flock __P((struct linux_flock *, struct flock *)); 78 static void bsd_to_linux_stat __P((struct stat *, struct linux_stat *)); 79 static int linux_stat1 __P((struct proc *, void *, register_t *, int)); 80 81 /* 82 * Some file-related calls are handled here. The usual flag conversion 83 * an structure conversion is done, and alternate emul path searching. 84 */ 85 86 /* 87 * The next two functions convert between the Linux and NetBSD values 88 * of the flags used in open(2) and fcntl(2). 89 */ 90 static int 91 linux_to_bsd_ioflags(lflags) 92 int lflags; 93 { 94 int res = 0; 95 96 res |= cvtto_bsd_mask(lflags, LINUX_O_WRONLY, O_WRONLY); 97 res |= cvtto_bsd_mask(lflags, LINUX_O_RDONLY, O_RDONLY); 98 res |= cvtto_bsd_mask(lflags, LINUX_O_RDWR, O_RDWR); 99 res |= cvtto_bsd_mask(lflags, LINUX_O_CREAT, O_CREAT); 100 res |= cvtto_bsd_mask(lflags, LINUX_O_EXCL, O_EXCL); 101 res |= cvtto_bsd_mask(lflags, LINUX_O_NOCTTY, O_NOCTTY); 102 res |= cvtto_bsd_mask(lflags, LINUX_O_TRUNC, O_TRUNC); 103 res |= cvtto_bsd_mask(lflags, LINUX_O_NDELAY, O_NDELAY); 104 res |= cvtto_bsd_mask(lflags, LINUX_O_SYNC, O_FSYNC); 105 res |= cvtto_bsd_mask(lflags, LINUX_FASYNC, O_ASYNC); 106 res |= cvtto_bsd_mask(lflags, LINUX_O_APPEND, O_APPEND); 107 108 return res; 109 } 110 111 static int 112 bsd_to_linux_ioflags(bflags) 113 int bflags; 114 { 115 int res = 0; 116 117 res |= cvtto_linux_mask(bflags, O_WRONLY, LINUX_O_WRONLY); 118 res |= cvtto_linux_mask(bflags, O_RDONLY, LINUX_O_RDONLY); 119 res |= cvtto_linux_mask(bflags, O_RDWR, LINUX_O_RDWR); 120 res |= cvtto_linux_mask(bflags, O_CREAT, LINUX_O_CREAT); 121 res |= cvtto_linux_mask(bflags, O_EXCL, LINUX_O_EXCL); 122 res |= cvtto_linux_mask(bflags, O_NOCTTY, LINUX_O_NOCTTY); 123 res |= cvtto_linux_mask(bflags, O_TRUNC, LINUX_O_TRUNC); 124 res |= cvtto_linux_mask(bflags, O_NDELAY, LINUX_O_NDELAY); 125 res |= cvtto_linux_mask(bflags, O_FSYNC, LINUX_O_SYNC); 126 res |= cvtto_linux_mask(bflags, O_ASYNC, LINUX_FASYNC); 127 res |= cvtto_linux_mask(bflags, O_APPEND, LINUX_O_APPEND); 128 129 return res; 130 } 131 132 /* 133 * creat(2) is an obsolete function, but it's present as a Linux 134 * system call, so let's deal with it. 135 * 136 * Note: On the Alpha this doesn't really exist in Linux, but it's defined 137 * in syscalls.master anyway so this doesn't have to be special cased. 138 * 139 * Just call open(2) with the TRUNC, CREAT and WRONLY flags. 140 */ 141 int 142 linux_sys_creat(p, v, retval) 143 struct proc *p; 144 void *v; 145 register_t *retval; 146 { 147 struct linux_sys_creat_args /* { 148 syscallarg(const char *) path; 149 syscallarg(int) mode; 150 } */ *uap = v; 151 struct sys_open_args oa; 152 caddr_t sg; 153 154 sg = stackgap_init(p, 0); 155 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 156 157 SCARG(&oa, path) = SCARG(uap, path); 158 SCARG(&oa, flags) = O_CREAT | O_TRUNC | O_WRONLY; 159 SCARG(&oa, mode) = SCARG(uap, mode); 160 161 return sys_open(p, &oa, retval); 162 } 163 164 /* 165 * open(2). Take care of the different flag values, and let the 166 * NetBSD syscall do the real work. See if this operation 167 * gives the current process a controlling terminal. 168 * (XXX is this necessary?) 169 */ 170 int 171 linux_sys_open(p, v, retval) 172 struct proc *p; 173 void *v; 174 register_t *retval; 175 { 176 struct linux_sys_open_args /* { 177 syscallarg(const char *) path; 178 syscallarg(int) flags; 179 syscallarg(int) mode; 180 } */ *uap = v; 181 int error, fl; 182 struct sys_open_args boa; 183 caddr_t sg; 184 185 sg = stackgap_init(p, 0); 186 187 fl = linux_to_bsd_ioflags(SCARG(uap, flags)); 188 189 if (fl & O_CREAT) 190 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 191 else 192 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 193 194 SCARG(&boa, path) = SCARG(uap, path); 195 SCARG(&boa, flags) = fl; 196 SCARG(&boa, mode) = SCARG(uap, mode); 197 198 if ((error = sys_open(p, &boa, retval))) 199 return error; 200 201 /* 202 * this bit from sunos_misc.c (and svr4_fcntl.c). 203 * If we are a session leader, and we don't have a controlling 204 * terminal yet, and the O_NOCTTY flag is not set, try to make 205 * this the controlling terminal. 206 */ 207 if (!(fl & O_NOCTTY) && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) { 208 struct filedesc *fdp = p->p_fd; 209 struct file *fp; 210 211 fp = fd_getfile(fdp, *retval); 212 213 /* ignore any error, just give it a try */ 214 if (fp != NULL && fp->f_type == DTYPE_VNODE) 215 (fp->f_ops->fo_ioctl) (fp, TIOCSCTTY, (caddr_t) 0, p); 216 } 217 return 0; 218 } 219 220 /* 221 * The next two functions take care of converting the flock 222 * structure back and forth between Linux and NetBSD format. 223 * The only difference in the structures is the order of 224 * the fields, and the 'whence' value. 225 */ 226 static void 227 bsd_to_linux_flock(bfp, lfp) 228 struct flock *bfp; 229 struct linux_flock *lfp; 230 { 231 232 lfp->l_start = bfp->l_start; 233 lfp->l_len = bfp->l_len; 234 lfp->l_pid = bfp->l_pid; 235 lfp->l_whence = bfp->l_whence; 236 switch (bfp->l_type) { 237 case F_RDLCK: 238 lfp->l_type = LINUX_F_RDLCK; 239 break; 240 case F_UNLCK: 241 lfp->l_type = LINUX_F_UNLCK; 242 break; 243 case F_WRLCK: 244 lfp->l_type = LINUX_F_WRLCK; 245 break; 246 } 247 } 248 249 static void 250 linux_to_bsd_flock(lfp, bfp) 251 struct linux_flock *lfp; 252 struct flock *bfp; 253 { 254 255 bfp->l_start = lfp->l_start; 256 bfp->l_len = lfp->l_len; 257 bfp->l_pid = lfp->l_pid; 258 bfp->l_whence = lfp->l_whence; 259 switch (lfp->l_type) { 260 case LINUX_F_RDLCK: 261 bfp->l_type = F_RDLCK; 262 break; 263 case LINUX_F_UNLCK: 264 bfp->l_type = F_UNLCK; 265 break; 266 case LINUX_F_WRLCK: 267 bfp->l_type = F_WRLCK; 268 break; 269 } 270 } 271 272 /* 273 * Most actions in the fcntl() call are straightforward; simply 274 * pass control to the NetBSD system call. A few commands need 275 * conversions after the actual system call has done its work, 276 * because the flag values and lock structure are different. 277 */ 278 int 279 linux_sys_fcntl(p, v, retval) 280 struct proc *p; 281 void *v; 282 register_t *retval; 283 { 284 struct linux_sys_fcntl_args /* { 285 syscallarg(int) fd; 286 syscallarg(int) cmd; 287 syscallarg(void *) arg; 288 } */ *uap = v; 289 int fd, cmd, error; 290 u_long val; 291 caddr_t arg, sg; 292 struct linux_flock lfl; 293 struct flock *bfp, bfl; 294 struct sys_fcntl_args fca; 295 struct filedesc *fdp; 296 struct file *fp; 297 struct vnode *vp; 298 struct vattr va; 299 long pgid; 300 struct pgrp *pgrp; 301 struct tty *tp, *(*d_tty) __P((dev_t)); 302 303 fd = SCARG(uap, fd); 304 cmd = SCARG(uap, cmd); 305 arg = (caddr_t) SCARG(uap, arg); 306 307 switch (cmd) { 308 case LINUX_F_DUPFD: 309 cmd = F_DUPFD; 310 break; 311 case LINUX_F_GETFD: 312 cmd = F_GETFD; 313 break; 314 case LINUX_F_SETFD: 315 cmd = F_SETFD; 316 break; 317 case LINUX_F_GETFL: 318 SCARG(&fca, fd) = fd; 319 SCARG(&fca, cmd) = F_GETFL; 320 SCARG(&fca, arg) = arg; 321 if ((error = sys_fcntl(p, &fca, retval))) 322 return error; 323 retval[0] = bsd_to_linux_ioflags(retval[0]); 324 return 0; 325 case LINUX_F_SETFL: { 326 struct file *fp = NULL; 327 328 val = linux_to_bsd_ioflags((unsigned long)SCARG(uap, arg)); 329 330 /* 331 * Linux seems to have same semantics for sending SIGIO to the 332 * read side of socket, but slighly different semantics 333 * for SIGIO to the write side. Rather than sending the SIGIO 334 * every time it's possible to write (directly) more data, it 335 * only sends SIGIO if last write(2) failed due to insufficient 336 * memory to hold the data. This is compatible enough 337 * with NetBSD semantics to not do anything about the 338 * difference. 339 * 340 * Linux does NOT send SIGIO for pipes. Deal with socketpair 341 * ones and DTYPE_PIPE ones. For these, we don't set 342 * the underlying flags (we don't pass O_ASYNC flag down 343 * to sys_fcntl()), but set the FASYNC flag for file descriptor, 344 * so that F_GETFL would report the ASYNC i/o is on. 345 */ 346 if (val & O_ASYNC) { 347 if (((fp = fd_getfile(p->p_fd, fd)) == NULL)) 348 return (EBADF); 349 350 FILE_USE(fp); 351 352 if (((fp->f_type == DTYPE_SOCKET) && fp->f_data 353 && ((struct socket *)fp->f_data)->so_state & SS_ISAPIPE) 354 || (fp->f_type == DTYPE_PIPE)) 355 val &= ~O_ASYNC; 356 else { 357 /* not a pipe, do not modify anything */ 358 FILE_UNUSE(fp, p); 359 fp = NULL; 360 } 361 } 362 363 SCARG(&fca, fd) = fd; 364 SCARG(&fca, cmd) = F_SETFL; 365 SCARG(&fca, arg) = (caddr_t) val; 366 367 error = sys_fcntl(p, &fca, retval); 368 369 /* Now set the FASYNC flag for pipes */ 370 if (fp) { 371 if (!error) 372 fp->f_flag |= FASYNC; 373 FILE_UNUSE(fp, p); 374 } 375 376 return (error); 377 } 378 case LINUX_F_GETLK: 379 sg = stackgap_init(p, 0); 380 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 381 if ((error = copyin(arg, &lfl, sizeof lfl))) 382 return error; 383 linux_to_bsd_flock(&lfl, &bfl); 384 if ((error = copyout(&bfl, bfp, sizeof bfl))) 385 return error; 386 SCARG(&fca, fd) = fd; 387 SCARG(&fca, cmd) = F_GETLK; 388 SCARG(&fca, arg) = bfp; 389 if ((error = sys_fcntl(p, &fca, retval))) 390 return error; 391 if ((error = copyin(bfp, &bfl, sizeof bfl))) 392 return error; 393 bsd_to_linux_flock(&bfl, &lfl); 394 return copyout(&lfl, arg, sizeof lfl); 395 396 case LINUX_F_SETLK: 397 case LINUX_F_SETLKW: 398 cmd = (cmd == LINUX_F_SETLK ? F_SETLK : F_SETLKW); 399 if ((error = copyin(arg, &lfl, sizeof lfl))) 400 return error; 401 linux_to_bsd_flock(&lfl, &bfl); 402 sg = stackgap_init(p, 0); 403 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 404 if ((error = copyout(&bfl, bfp, sizeof bfl))) 405 return error; 406 arg = (caddr_t)bfp; 407 break; 408 409 case LINUX_F_SETOWN: 410 case LINUX_F_GETOWN: 411 /* 412 * We need to route fcntl() for tty descriptors around normal 413 * fcntl(), since NetBSD tty TIOC{G,S}PGRP semantics is too 414 * restrictive for Linux F_{G,S}ETOWN. For non-tty descriptors, 415 * this is not a problem. 416 */ 417 fdp = p->p_fd; 418 if ((fp = fd_getfile(fdp, fd)) == NULL) 419 return EBADF; 420 /* FILE_USE() not needed here */ 421 if (fp->f_type != DTYPE_VNODE) { 422 notty: 423 /* Not a tty, proceed with common fcntl() */ 424 cmd = cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN; 425 break; 426 } 427 428 /* check that the vnode is a tty */ 429 vp = (struct vnode *)fp->f_data; 430 if (vp->v_type != VCHR) 431 goto notty; 432 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 433 return error; 434 d_tty = cdevsw[major(va.va_rdev)].d_tty; 435 if (!d_tty || (!(tp = (*d_tty)(va.va_rdev)))) 436 goto notty; 437 438 /* set tty pg_id appropriately */ 439 if (cmd == LINUX_F_GETOWN) { 440 retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 441 return 0; 442 } 443 if ((long)arg <= 0) { 444 pgid = -(long)arg; 445 } else { 446 struct proc *p1 = pfind((long)arg); 447 if (p1 == NULL) 448 return (ESRCH); 449 pgid = (long)p1->p_pgrp->pg_id; 450 } 451 pgrp = pgfind(pgid); 452 if (pgrp == NULL || pgrp->pg_session != p->p_session) 453 return EPERM; 454 tp->t_pgrp = pgrp; 455 return 0; 456 457 default: 458 return EOPNOTSUPP; 459 } 460 461 SCARG(&fca, fd) = fd; 462 SCARG(&fca, cmd) = cmd; 463 SCARG(&fca, arg) = arg; 464 465 return sys_fcntl(p, &fca, retval); 466 } 467 468 /* 469 * Convert a NetBSD stat structure to a Linux stat structure. 470 * Only the order of the fields and the padding in the structure 471 * is different. linux_fakedev is a machine-dependent function 472 * which optionally converts device driver major/minor numbers 473 * (XXX horrible, but what can you do against code that compares 474 * things against constant major device numbers? sigh) 475 */ 476 static void 477 bsd_to_linux_stat(bsp, lsp) 478 struct stat *bsp; 479 struct linux_stat *lsp; 480 { 481 482 lsp->lst_dev = linux_fakedev(bsp->st_dev, 0); 483 lsp->lst_ino = bsp->st_ino; 484 lsp->lst_mode = (linux_mode_t)bsp->st_mode; 485 if (bsp->st_nlink >= (1 << 15)) 486 lsp->lst_nlink = (1 << 15) - 1; 487 else 488 lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; 489 lsp->lst_uid = bsp->st_uid; 490 lsp->lst_gid = bsp->st_gid; 491 lsp->lst_rdev = linux_fakedev(bsp->st_rdev, 1); 492 lsp->lst_size = bsp->st_size; 493 lsp->lst_blksize = bsp->st_blksize; 494 lsp->lst_blocks = bsp->st_blocks; 495 lsp->lst_atime = bsp->st_atime; 496 lsp->lst_mtime = bsp->st_mtime; 497 lsp->lst_ctime = bsp->st_ctime; 498 } 499 500 /* 501 * The stat functions below are plain sailing. stat and lstat are handled 502 * by one function to avoid code duplication. 503 */ 504 int 505 linux_sys_fstat(p, v, retval) 506 struct proc *p; 507 void *v; 508 register_t *retval; 509 { 510 struct linux_sys_fstat_args /* { 511 syscallarg(int) fd; 512 syscallarg(linux_stat *) sp; 513 } */ *uap = v; 514 struct sys___fstat13_args fsa; 515 struct linux_stat tmplst; 516 struct stat *st,tmpst; 517 caddr_t sg; 518 int error; 519 520 sg = stackgap_init(p, 0); 521 522 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 523 524 SCARG(&fsa, fd) = SCARG(uap, fd); 525 SCARG(&fsa, sb) = st; 526 527 if ((error = sys___fstat13(p, &fsa, retval))) 528 return error; 529 530 if ((error = copyin(st, &tmpst, sizeof tmpst))) 531 return error; 532 533 bsd_to_linux_stat(&tmpst, &tmplst); 534 535 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 536 return error; 537 538 return 0; 539 } 540 541 static int 542 linux_stat1(p, v, retval, dolstat) 543 struct proc *p; 544 void *v; 545 register_t *retval; 546 int dolstat; 547 { 548 struct sys___stat13_args sa; 549 struct linux_stat tmplst; 550 struct stat *st, tmpst; 551 caddr_t sg; 552 int error; 553 struct linux_sys_stat_args *uap = v; 554 555 sg = stackgap_init(p, 0); 556 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 557 if (dolstat) 558 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 559 else 560 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 561 562 SCARG(&sa, ub) = st; 563 SCARG(&sa, path) = SCARG(uap, path); 564 565 if ((error = (dolstat ? sys___lstat13(p, &sa, retval) : 566 sys___stat13(p, &sa, retval)))) 567 return error; 568 569 if ((error = copyin(st, &tmpst, sizeof tmpst))) 570 return error; 571 572 bsd_to_linux_stat(&tmpst, &tmplst); 573 574 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 575 return error; 576 577 return 0; 578 } 579 580 int 581 linux_sys_stat(p, v, retval) 582 struct proc *p; 583 void *v; 584 register_t *retval; 585 { 586 struct linux_sys_stat_args /* { 587 syscallarg(const char *) path; 588 syscallarg(struct linux_stat *) sp; 589 } */ *uap = v; 590 591 return linux_stat1(p, uap, retval, 0); 592 } 593 594 /* Note: this is "newlstat" in the Linux sources */ 595 /* (we don't bother with the old lstat currently) */ 596 int 597 linux_sys_lstat(p, v, retval) 598 struct proc *p; 599 void *v; 600 register_t *retval; 601 { 602 struct linux_sys_lstat_args /* { 603 syscallarg(const char *) path; 604 syscallarg(struct linux_stat *) sp; 605 } */ *uap = v; 606 607 return linux_stat1(p, uap, retval, 1); 608 } 609 610 /* 611 * The following syscalls are mostly here because of the alternate path check. 612 */ 613 int 614 linux_sys_access(p, v, retval) 615 struct proc *p; 616 void *v; 617 register_t *retval; 618 { 619 struct linux_sys_access_args /* { 620 syscallarg(const char *) path; 621 syscallarg(int) flags; 622 } */ *uap = v; 623 caddr_t sg = stackgap_init(p, 0); 624 625 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 626 627 return sys_access(p, uap, retval); 628 } 629 630 int 631 linux_sys_unlink(p, v, retval) 632 struct proc *p; 633 void *v; 634 register_t *retval; 635 636 { 637 struct linux_sys_unlink_args /* { 638 syscallarg(const char *) path; 639 } */ *uap = v; 640 caddr_t sg = stackgap_init(p, 0); 641 642 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 643 644 return sys_unlink(p, uap, retval); 645 } 646 647 int 648 linux_sys_chdir(p, v, retval) 649 struct proc *p; 650 void *v; 651 register_t *retval; 652 { 653 struct linux_sys_chdir_args /* { 654 syscallarg(const char *) path; 655 } */ *uap = v; 656 caddr_t sg = stackgap_init(p, 0); 657 658 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 659 660 return sys_chdir(p, uap, retval); 661 } 662 663 int 664 linux_sys_mknod(p, v, retval) 665 struct proc *p; 666 void *v; 667 register_t *retval; 668 { 669 struct linux_sys_mknod_args /* { 670 syscallarg(const char *) path; 671 syscallarg(int) mode; 672 syscallarg(int) dev; 673 } */ *uap = v; 674 caddr_t sg = stackgap_init(p, 0); 675 struct sys_mkfifo_args bma; 676 677 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 678 679 /* 680 * BSD handles FIFOs separately 681 */ 682 if (SCARG(uap, mode) & S_IFIFO) { 683 SCARG(&bma, path) = SCARG(uap, path); 684 SCARG(&bma, mode) = SCARG(uap, mode); 685 return sys_mkfifo(p, uap, retval); 686 } else 687 return sys_mknod(p, uap, retval); 688 } 689 690 int 691 linux_sys_chmod(p, v, retval) 692 struct proc *p; 693 void *v; 694 register_t *retval; 695 { 696 struct linux_sys_chmod_args /* { 697 syscallarg(const char *) path; 698 syscallarg(int) mode; 699 } */ *uap = v; 700 caddr_t sg = stackgap_init(p, 0); 701 702 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 703 704 return sys_chmod(p, uap, retval); 705 } 706 707 #if defined(__i386__) || defined(__m68k__) || defined(__arm__) 708 int 709 linux_sys_chown16(p, v, retval) 710 struct proc *p; 711 void *v; 712 register_t *retval; 713 { 714 struct linux_sys_chown16_args /* { 715 syscallarg(const char *) path; 716 syscallarg(int) uid; 717 syscallarg(int) gid; 718 } */ *uap = v; 719 struct sys___posix_chown_args bca; 720 caddr_t sg = stackgap_init(p, 0); 721 722 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 723 724 SCARG(&bca, path) = SCARG(uap, path); 725 SCARG(&bca, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 726 (uid_t)-1 : SCARG(uap, uid); 727 SCARG(&bca, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 728 (gid_t)-1 : SCARG(uap, gid); 729 730 return sys___posix_chown(p, &bca, retval); 731 } 732 733 int 734 linux_sys_fchown16(p, v, retval) 735 struct proc *p; 736 void *v; 737 register_t *retval; 738 { 739 struct linux_sys_fchown16_args /* { 740 syscallarg(int) fd; 741 syscallarg(int) uid; 742 syscallarg(int) gid; 743 } */ *uap = v; 744 struct sys___posix_fchown_args bfa; 745 746 SCARG(&bfa, fd) = SCARG(uap, fd); 747 SCARG(&bfa, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 748 (uid_t)-1 : SCARG(uap, uid); 749 SCARG(&bfa, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 750 (gid_t)-1 : SCARG(uap, gid); 751 752 return sys___posix_fchown(p, &bfa, retval); 753 } 754 755 int 756 linux_sys_lchown16(p, v, retval) 757 struct proc *p; 758 void *v; 759 register_t *retval; 760 { 761 struct linux_sys_lchown16_args /* { 762 syscallarg(char *) path; 763 syscallarg(int) uid; 764 syscallarg(int) gid; 765 } */ *uap = v; 766 struct sys___posix_lchown_args bla; 767 caddr_t sg = stackgap_init(p, 0); 768 769 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 770 771 SCARG(&bla, path) = SCARG(uap, path); 772 SCARG(&bla, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 773 (uid_t)-1 : SCARG(uap, uid); 774 SCARG(&bla, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 775 (gid_t)-1 : SCARG(uap, gid); 776 777 return sys___posix_lchown(p, &bla, retval); 778 } 779 #endif /* __i386__ || __m68k__ || __arm__ */ 780 #if defined (__i386__) || defined (__m68k__) || \ 781 defined (__powerpc__) || defined (__mips__) || defined(__arm__) 782 int 783 linux_sys_chown(p, v, retval) 784 struct proc *p; 785 void *v; 786 register_t *retval; 787 { 788 struct linux_sys_chown_args /* { 789 syscallarg(char *) path; 790 syscallarg(int) uid; 791 syscallarg(int) gid; 792 } */ *uap = v; 793 caddr_t sg = stackgap_init(p, 0); 794 795 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 796 797 return sys___posix_chown(p, uap, retval); 798 } 799 800 int 801 linux_sys_lchown(p, v, retval) 802 struct proc *p; 803 void *v; 804 register_t *retval; 805 { 806 struct linux_sys_lchown_args /* { 807 syscallarg(char *) path; 808 syscallarg(int) uid; 809 syscallarg(int) gid; 810 } */ *uap = v; 811 caddr_t sg = stackgap_init(p, 0); 812 813 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 814 815 return sys___posix_lchown(p, uap, retval); 816 } 817 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 818 819 int 820 linux_sys_rename(p, v, retval) 821 struct proc *p; 822 void *v; 823 register_t *retval; 824 { 825 struct linux_sys_rename_args /* { 826 syscallarg(const char *) from; 827 syscallarg(const char *) to; 828 } */ *uap = v; 829 caddr_t sg = stackgap_init(p, 0); 830 831 CHECK_ALT_EXIST(p, &sg, SCARG(uap, from)); 832 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 833 834 return sys___posix_rename(p, uap, retval); 835 } 836 837 int 838 linux_sys_mkdir(p, v, retval) 839 struct proc *p; 840 void *v; 841 register_t *retval; 842 { 843 struct linux_sys_mkdir_args /* { 844 syscallarg(const char *) path; 845 syscallarg(int) mode; 846 } */ *uap = v; 847 caddr_t sg = stackgap_init(p, 0); 848 849 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 850 851 return sys_mkdir(p, uap, retval); 852 } 853 854 int 855 linux_sys_rmdir(p, v, retval) 856 struct proc *p; 857 void *v; 858 register_t *retval; 859 { 860 struct linux_sys_rmdir_args /* { 861 syscallarg(const char *) path; 862 } */ *uap = v; 863 caddr_t sg = stackgap_init(p, 0); 864 865 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 866 867 return sys_rmdir(p, uap, retval); 868 } 869 870 int 871 linux_sys_symlink(p, v, retval) 872 struct proc *p; 873 void *v; 874 register_t *retval; 875 { 876 struct linux_sys_symlink_args /* { 877 syscallarg(const char *) path; 878 syscallarg(const char *) to; 879 } */ *uap = v; 880 caddr_t sg = stackgap_init(p, 0); 881 882 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 883 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 884 885 return sys_symlink(p, uap, retval); 886 } 887 888 int 889 linux_sys_link(p, v, retval) 890 struct proc *p; 891 void *v; 892 register_t *retval; 893 { 894 struct linux_sys_link_args /* { 895 syscallarg(const char *) path; 896 syscallarg(const char *) link; 897 } */ *uap = v; 898 caddr_t sg = stackgap_init(p, 0); 899 900 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 901 CHECK_ALT_CREAT(p, &sg, SCARG(uap, link)); 902 903 return sys_link(p, uap, retval); 904 } 905 906 int 907 linux_sys_readlink(p, v, retval) 908 struct proc *p; 909 void *v; 910 register_t *retval; 911 { 912 struct linux_sys_readlink_args /* { 913 syscallarg(const char *) name; 914 syscallarg(char *) buf; 915 syscallarg(int) count; 916 } */ *uap = v; 917 caddr_t sg = stackgap_init(p, 0); 918 919 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, name)); 920 921 return sys_readlink(p, uap, retval); 922 } 923 924 int 925 linux_sys_truncate(p, v, retval) 926 struct proc *p; 927 void *v; 928 register_t *retval; 929 { 930 struct linux_sys_truncate_args /* { 931 syscallarg(const char *) path; 932 syscallarg(long) length; 933 } */ *uap = v; 934 caddr_t sg = stackgap_init(p, 0); 935 936 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 937 938 return compat_43_sys_truncate(p, uap, retval); 939 } 940 941 /* 942 * This is just fsync() for now (just as it is in the Linux kernel) 943 * Note: this is not implemented under Linux on Alpha and Arm 944 * but should still be defined in our syscalls.master. 945 * (syscall #148 on the arm) 946 */ 947 int 948 linux_sys_fdatasync(p, v, retval) 949 struct proc *p; 950 void *v; 951 register_t *retval; 952 { 953 #ifdef notdef 954 struct linux_sys_fdatasync_args /* { 955 syscallarg(int) fd; 956 } */ *uap = v; 957 #endif 958 return sys_fsync(p, v, retval); 959 } 960 961 /* 962 * pread(2). 963 */ 964 int 965 linux_sys_pread(p, v, retval) 966 struct proc *p; 967 void *v; 968 register_t *retval; 969 { 970 struct linux_sys_pread_args /* { 971 syscallarg(int) fd; 972 syscallarg(void *) buf; 973 syscallarg(size_t) nbyte; 974 syscallarg(linux_off_t) offset; 975 } */ *uap = v; 976 struct sys_pread_args pra; 977 978 SCARG(&pra, fd) = SCARG(uap, fd); 979 SCARG(&pra, buf) = SCARG(uap, buf); 980 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 981 SCARG(&pra, offset) = SCARG(uap, offset); 982 983 return sys_read(p, &pra, retval); 984 } 985 986 /* 987 * pwrite(2). 988 */ 989 int 990 linux_sys_pwrite(p, v, retval) 991 struct proc *p; 992 void *v; 993 register_t *retval; 994 { 995 struct linux_sys_pwrite_args /* { 996 syscallarg(int) fd; 997 syscallarg(void *) buf; 998 syscallarg(size_t) nbyte; 999 syscallarg(linux_off_t) offset; 1000 } */ *uap = v; 1001 struct sys_pwrite_args pra; 1002 1003 SCARG(&pra, fd) = SCARG(uap, fd); 1004 SCARG(&pra, buf) = SCARG(uap, buf); 1005 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 1006 SCARG(&pra, offset) = SCARG(uap, offset); 1007 1008 return sys_write(p, &pra, retval); 1009 } 1010