linux_file.c revision 1.45
1 /* $NetBSD: linux_file.c,v 1.45 2002/02/15 16:48:02 christos 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 1.45 2002/02/15 16:48:02 christos 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->p_emul); 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->p_emul); 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->p_emul); 380 bfp = (struct flock *) stackgap_alloc(&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 break; 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->p_emul); 403 bfp = (struct flock *) stackgap_alloc(&sg, sizeof *bfp); 404 if ((error = copyout(&bfl, bfp, sizeof bfl))) 405 return error; 406 SCARG(&fca, fd) = fd; 407 SCARG(&fca, cmd) = cmd; 408 SCARG(&fca, arg) = bfp; 409 return sys_fcntl(p, &fca, retval); 410 break; 411 case LINUX_F_SETOWN: 412 case LINUX_F_GETOWN: 413 /* 414 * We need to route around the normal fcntl() for these calls, 415 * since it uses TIOC{G,S}PGRP, which is too restrictive for 416 * Linux F_{G,S}ETOWN semantics. For sockets, this problem 417 * does not exist. 418 */ 419 fdp = p->p_fd; 420 if ((fp = fd_getfile(fdp, fd)) == NULL) 421 return EBADF; 422 if (fp->f_type == DTYPE_SOCKET) { 423 cmd = cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN; 424 break; 425 } 426 vp = (struct vnode *)fp->f_data; 427 if (vp->v_type != VCHR) 428 return EINVAL; 429 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 430 return error; 431 d_tty = cdevsw[major(va.va_rdev)].d_tty; 432 if (!d_tty || (!(tp = (*d_tty)(va.va_rdev)))) 433 return EINVAL; 434 if (cmd == LINUX_F_GETOWN) { 435 retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 436 return 0; 437 } 438 if ((long)arg <= 0) { 439 pgid = -(long)arg; 440 } else { 441 struct proc *p1 = pfind((long)arg); 442 if (p1 == 0) 443 return (ESRCH); 444 pgid = (long)p1->p_pgrp->pg_id; 445 } 446 pgrp = pgfind(pgid); 447 if (pgrp == NULL || pgrp->pg_session != p->p_session) 448 return EPERM; 449 tp->t_pgrp = pgrp; 450 return 0; 451 default: 452 return EOPNOTSUPP; 453 } 454 455 SCARG(&fca, fd) = fd; 456 SCARG(&fca, cmd) = cmd; 457 SCARG(&fca, arg) = arg; 458 459 return sys_fcntl(p, &fca, retval); 460 } 461 462 /* 463 * Convert a NetBSD stat structure to a Linux stat structure. 464 * Only the order of the fields and the padding in the structure 465 * is different. linux_fakedev is a machine-dependent function 466 * which optionally converts device driver major/minor numbers 467 * (XXX horrible, but what can you do against code that compares 468 * things against constant major device numbers? sigh) 469 */ 470 static void 471 bsd_to_linux_stat(bsp, lsp) 472 struct stat *bsp; 473 struct linux_stat *lsp; 474 { 475 476 lsp->lst_dev = linux_fakedev(bsp->st_dev, 0); 477 lsp->lst_ino = bsp->st_ino; 478 lsp->lst_mode = (linux_mode_t)bsp->st_mode; 479 if (bsp->st_nlink >= (1 << 15)) 480 lsp->lst_nlink = (1 << 15) - 1; 481 else 482 lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; 483 lsp->lst_uid = bsp->st_uid; 484 lsp->lst_gid = bsp->st_gid; 485 lsp->lst_rdev = linux_fakedev(bsp->st_rdev, 1); 486 lsp->lst_size = bsp->st_size; 487 lsp->lst_blksize = bsp->st_blksize; 488 lsp->lst_blocks = bsp->st_blocks; 489 lsp->lst_atime = bsp->st_atime; 490 lsp->lst_mtime = bsp->st_mtime; 491 lsp->lst_ctime = bsp->st_ctime; 492 } 493 494 /* 495 * The stat functions below are plain sailing. stat and lstat are handled 496 * by one function to avoid code duplication. 497 */ 498 int 499 linux_sys_fstat(p, v, retval) 500 struct proc *p; 501 void *v; 502 register_t *retval; 503 { 504 struct linux_sys_fstat_args /* { 505 syscallarg(int) fd; 506 syscallarg(linux_stat *) sp; 507 } */ *uap = v; 508 struct sys___fstat13_args fsa; 509 struct linux_stat tmplst; 510 struct stat *st,tmpst; 511 caddr_t sg; 512 int error; 513 514 sg = stackgap_init(p->p_emul); 515 516 st = stackgap_alloc(&sg, sizeof (struct stat)); 517 518 SCARG(&fsa, fd) = SCARG(uap, fd); 519 SCARG(&fsa, sb) = st; 520 521 if ((error = sys___fstat13(p, &fsa, retval))) 522 return error; 523 524 if ((error = copyin(st, &tmpst, sizeof tmpst))) 525 return error; 526 527 bsd_to_linux_stat(&tmpst, &tmplst); 528 529 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 530 return error; 531 532 return 0; 533 } 534 535 static int 536 linux_stat1(p, v, retval, dolstat) 537 struct proc *p; 538 void *v; 539 register_t *retval; 540 int dolstat; 541 { 542 struct sys___stat13_args sa; 543 struct linux_stat tmplst; 544 struct stat *st, tmpst; 545 caddr_t sg; 546 int error; 547 struct linux_sys_stat_args *uap = v; 548 549 sg = stackgap_init(p->p_emul); 550 st = stackgap_alloc(&sg, sizeof (struct stat)); 551 if (dolstat) 552 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 553 else 554 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 555 556 SCARG(&sa, ub) = st; 557 SCARG(&sa, path) = SCARG(uap, path); 558 559 if ((error = (dolstat ? sys___lstat13(p, &sa, retval) : 560 sys___stat13(p, &sa, retval)))) 561 return error; 562 563 if ((error = copyin(st, &tmpst, sizeof tmpst))) 564 return error; 565 566 bsd_to_linux_stat(&tmpst, &tmplst); 567 568 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 569 return error; 570 571 return 0; 572 } 573 574 int 575 linux_sys_stat(p, v, retval) 576 struct proc *p; 577 void *v; 578 register_t *retval; 579 { 580 struct linux_sys_stat_args /* { 581 syscallarg(const char *) path; 582 syscallarg(struct linux_stat *) sp; 583 } */ *uap = v; 584 585 return linux_stat1(p, uap, retval, 0); 586 } 587 588 /* Note: this is "newlstat" in the Linux sources */ 589 /* (we don't bother with the old lstat currently) */ 590 int 591 linux_sys_lstat(p, v, retval) 592 struct proc *p; 593 void *v; 594 register_t *retval; 595 { 596 struct linux_sys_lstat_args /* { 597 syscallarg(const char *) path; 598 syscallarg(struct linux_stat *) sp; 599 } */ *uap = v; 600 601 return linux_stat1(p, uap, retval, 1); 602 } 603 604 /* 605 * The following syscalls are mostly here because of the alternate path check. 606 */ 607 int 608 linux_sys_access(p, v, retval) 609 struct proc *p; 610 void *v; 611 register_t *retval; 612 { 613 struct linux_sys_access_args /* { 614 syscallarg(const char *) path; 615 syscallarg(int) flags; 616 } */ *uap = v; 617 caddr_t sg = stackgap_init(p->p_emul); 618 619 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 620 621 return sys_access(p, uap, retval); 622 } 623 624 int 625 linux_sys_unlink(p, v, retval) 626 struct proc *p; 627 void *v; 628 register_t *retval; 629 630 { 631 struct linux_sys_unlink_args /* { 632 syscallarg(const char *) path; 633 } */ *uap = v; 634 caddr_t sg = stackgap_init(p->p_emul); 635 636 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 637 638 return sys_unlink(p, uap, retval); 639 } 640 641 int 642 linux_sys_chdir(p, v, retval) 643 struct proc *p; 644 void *v; 645 register_t *retval; 646 { 647 struct linux_sys_chdir_args /* { 648 syscallarg(const char *) path; 649 } */ *uap = v; 650 caddr_t sg = stackgap_init(p->p_emul); 651 652 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 653 654 return sys_chdir(p, uap, retval); 655 } 656 657 int 658 linux_sys_mknod(p, v, retval) 659 struct proc *p; 660 void *v; 661 register_t *retval; 662 { 663 struct linux_sys_mknod_args /* { 664 syscallarg(const char *) path; 665 syscallarg(int) mode; 666 syscallarg(int) dev; 667 } */ *uap = v; 668 caddr_t sg = stackgap_init(p->p_emul); 669 struct sys_mkfifo_args bma; 670 671 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 672 673 /* 674 * BSD handles FIFOs separately 675 */ 676 if (SCARG(uap, mode) & S_IFIFO) { 677 SCARG(&bma, path) = SCARG(uap, path); 678 SCARG(&bma, mode) = SCARG(uap, mode); 679 return sys_mkfifo(p, uap, retval); 680 } else 681 return sys_mknod(p, uap, retval); 682 } 683 684 int 685 linux_sys_chmod(p, v, retval) 686 struct proc *p; 687 void *v; 688 register_t *retval; 689 { 690 struct linux_sys_chmod_args /* { 691 syscallarg(const char *) path; 692 syscallarg(int) mode; 693 } */ *uap = v; 694 caddr_t sg = stackgap_init(p->p_emul); 695 696 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 697 698 return sys_chmod(p, uap, retval); 699 } 700 701 #if defined(__i386__) || defined(__m68k__) || defined(__arm__) 702 int 703 linux_sys_chown16(p, v, retval) 704 struct proc *p; 705 void *v; 706 register_t *retval; 707 { 708 struct linux_sys_chown16_args /* { 709 syscallarg(const char *) path; 710 syscallarg(int) uid; 711 syscallarg(int) gid; 712 } */ *uap = v; 713 struct sys___posix_chown_args bca; 714 caddr_t sg = stackgap_init(p->p_emul); 715 716 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 717 718 SCARG(&bca, path) = SCARG(uap, path); 719 SCARG(&bca, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 720 (uid_t)-1 : SCARG(uap, uid); 721 SCARG(&bca, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 722 (gid_t)-1 : SCARG(uap, gid); 723 724 return sys___posix_chown(p, &bca, retval); 725 } 726 727 int 728 linux_sys_fchown16(p, v, retval) 729 struct proc *p; 730 void *v; 731 register_t *retval; 732 { 733 struct linux_sys_fchown16_args /* { 734 syscallarg(int) fd; 735 syscallarg(int) uid; 736 syscallarg(int) gid; 737 } */ *uap = v; 738 struct sys___posix_fchown_args bfa; 739 740 SCARG(&bfa, fd) = SCARG(uap, fd); 741 SCARG(&bfa, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 742 (uid_t)-1 : SCARG(uap, uid); 743 SCARG(&bfa, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 744 (gid_t)-1 : SCARG(uap, gid); 745 746 return sys___posix_fchown(p, &bfa, retval); 747 } 748 749 int 750 linux_sys_lchown16(p, v, retval) 751 struct proc *p; 752 void *v; 753 register_t *retval; 754 { 755 struct linux_sys_lchown16_args /* { 756 syscallarg(char *) path; 757 syscallarg(int) uid; 758 syscallarg(int) gid; 759 } */ *uap = v; 760 struct sys___posix_lchown_args bla; 761 caddr_t sg = stackgap_init(p->p_emul); 762 763 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 764 765 SCARG(&bla, path) = SCARG(uap, path); 766 SCARG(&bla, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 767 (uid_t)-1 : SCARG(uap, uid); 768 SCARG(&bla, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 769 (gid_t)-1 : SCARG(uap, gid); 770 771 return sys___posix_lchown(p, &bla, retval); 772 } 773 #endif /* __i386__ || __m68k__ || __arm__ */ 774 #if defined (__i386__) || defined (__m68k__) || \ 775 defined (__powerpc__) || defined (__mips__) || defined(__arm__) 776 int 777 linux_sys_chown(p, v, retval) 778 struct proc *p; 779 void *v; 780 register_t *retval; 781 { 782 struct linux_sys_chown_args /* { 783 syscallarg(char *) path; 784 syscallarg(int) uid; 785 syscallarg(int) gid; 786 } */ *uap = v; 787 caddr_t sg = stackgap_init(p->p_emul); 788 789 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 790 791 return sys___posix_chown(p, uap, retval); 792 } 793 794 int 795 linux_sys_lchown(p, v, retval) 796 struct proc *p; 797 void *v; 798 register_t *retval; 799 { 800 struct linux_sys_lchown_args /* { 801 syscallarg(char *) path; 802 syscallarg(int) uid; 803 syscallarg(int) gid; 804 } */ *uap = v; 805 caddr_t sg = stackgap_init(p->p_emul); 806 807 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 808 809 return sys___posix_lchown(p, uap, retval); 810 } 811 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 812 813 int 814 linux_sys_rename(p, v, retval) 815 struct proc *p; 816 void *v; 817 register_t *retval; 818 { 819 struct linux_sys_rename_args /* { 820 syscallarg(const char *) from; 821 syscallarg(const char *) to; 822 } */ *uap = v; 823 caddr_t sg = stackgap_init(p->p_emul); 824 825 CHECK_ALT_EXIST(p, &sg, SCARG(uap, from)); 826 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 827 828 return sys___posix_rename(p, uap, retval); 829 } 830 831 int 832 linux_sys_mkdir(p, v, retval) 833 struct proc *p; 834 void *v; 835 register_t *retval; 836 { 837 struct linux_sys_mkdir_args /* { 838 syscallarg(const char *) path; 839 syscallarg(int) mode; 840 } */ *uap = v; 841 caddr_t sg = stackgap_init(p->p_emul); 842 843 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 844 845 return sys_mkdir(p, uap, retval); 846 } 847 848 int 849 linux_sys_rmdir(p, v, retval) 850 struct proc *p; 851 void *v; 852 register_t *retval; 853 { 854 struct linux_sys_rmdir_args /* { 855 syscallarg(const char *) path; 856 } */ *uap = v; 857 caddr_t sg = stackgap_init(p->p_emul); 858 859 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 860 861 return sys_rmdir(p, uap, retval); 862 } 863 864 int 865 linux_sys_symlink(p, v, retval) 866 struct proc *p; 867 void *v; 868 register_t *retval; 869 { 870 struct linux_sys_symlink_args /* { 871 syscallarg(const char *) path; 872 syscallarg(const char *) to; 873 } */ *uap = v; 874 caddr_t sg = stackgap_init(p->p_emul); 875 876 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 877 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 878 879 return sys_symlink(p, uap, retval); 880 } 881 882 int 883 linux_sys_link(p, v, retval) 884 struct proc *p; 885 void *v; 886 register_t *retval; 887 { 888 struct linux_sys_link_args /* { 889 syscallarg(const char *) path; 890 syscallarg(const char *) link; 891 } */ *uap = v; 892 caddr_t sg = stackgap_init(p->p_emul); 893 894 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 895 CHECK_ALT_CREAT(p, &sg, SCARG(uap, link)); 896 897 return sys_link(p, uap, retval); 898 } 899 900 int 901 linux_sys_readlink(p, v, retval) 902 struct proc *p; 903 void *v; 904 register_t *retval; 905 { 906 struct linux_sys_readlink_args /* { 907 syscallarg(const char *) name; 908 syscallarg(char *) buf; 909 syscallarg(int) count; 910 } */ *uap = v; 911 caddr_t sg = stackgap_init(p->p_emul); 912 913 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, name)); 914 915 return sys_readlink(p, uap, retval); 916 } 917 918 int 919 linux_sys_truncate(p, v, retval) 920 struct proc *p; 921 void *v; 922 register_t *retval; 923 { 924 struct linux_sys_truncate_args /* { 925 syscallarg(const char *) path; 926 syscallarg(long) length; 927 } */ *uap = v; 928 caddr_t sg = stackgap_init(p->p_emul); 929 930 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 931 932 return compat_43_sys_truncate(p, uap, retval); 933 } 934 935 /* 936 * This is just fsync() for now (just as it is in the Linux kernel) 937 * Note: this is not implemented under Linux on Alpha and Arm 938 * but should still be defined in our syscalls.master. 939 * (syscall #148 on the arm) 940 */ 941 int 942 linux_sys_fdatasync(p, v, retval) 943 struct proc *p; 944 void *v; 945 register_t *retval; 946 { 947 #ifdef notdef 948 struct linux_sys_fdatasync_args /* { 949 syscallarg(int) fd; 950 } */ *uap = v; 951 #endif 952 return sys_fsync(p, v, retval); 953 } 954 955 /* 956 * pread(2). 957 */ 958 int 959 linux_sys_pread(p, v, retval) 960 struct proc *p; 961 void *v; 962 register_t *retval; 963 { 964 struct linux_sys_pread_args /* { 965 syscallarg(int) fd; 966 syscallarg(void *) buf; 967 syscallarg(size_t) nbyte; 968 syscallarg(linux_off_t) offset; 969 } */ *uap = v; 970 struct sys_pread_args pra; 971 972 SCARG(&pra, fd) = SCARG(uap, fd); 973 SCARG(&pra, buf) = SCARG(uap, buf); 974 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 975 SCARG(&pra, offset) = SCARG(uap, offset); 976 977 return sys_read(p, &pra, retval); 978 } 979 980 /* 981 * pwrite(2). 982 */ 983 int 984 linux_sys_pwrite(p, v, retval) 985 struct proc *p; 986 void *v; 987 register_t *retval; 988 { 989 struct linux_sys_pwrite_args /* { 990 syscallarg(int) fd; 991 syscallarg(void *) buf; 992 syscallarg(size_t) nbyte; 993 syscallarg(linux_off_t) offset; 994 } */ *uap = v; 995 struct sys_pwrite_args pra; 996 997 SCARG(&pra, fd) = SCARG(uap, fd); 998 SCARG(&pra, buf) = SCARG(uap, buf); 999 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 1000 SCARG(&pra, offset) = SCARG(uap, offset); 1001 1002 return sys_write(p, &pra, retval); 1003 } 1004
Indexes created Thu Sep 25 16:09:42 GMT 2025