linux_file.c revision 1.49
1 /* $NetBSD: linux_file.c,v 1.49 2002/03/24 00:32:34 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 1.49 2002/03/24 00:32:34 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/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 break; 396 397 case LINUX_F_SETLK: 398 case LINUX_F_SETLKW: 399 cmd = (cmd == LINUX_F_SETLK ? F_SETLK : F_SETLKW); 400 if ((error = copyin(arg, &lfl, sizeof lfl))) 401 return error; 402 linux_to_bsd_flock(&lfl, &bfl); 403 sg = stackgap_init(p, 0); 404 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 405 if ((error = copyout(&bfl, bfp, sizeof bfl))) 406 return error; 407 SCARG(&fca, fd) = fd; 408 SCARG(&fca, cmd) = cmd; 409 SCARG(&fca, arg) = bfp; 410 return sys_fcntl(p, &fca, retval); 411 break; 412 413 case LINUX_F_SETOWN: 414 case LINUX_F_GETOWN: 415 /* 416 * We need to route fcntl() for tty descriptors around normal 417 * fcntl(), since NetBSD tty TIOC{G,S}PGRP semantics is too 418 * restrictive for Linux F_{G,S}ETOWN. For non-tty descriptors, 419 * this is not a problem. 420 */ 421 fdp = p->p_fd; 422 if ((fp = fd_getfile(fdp, fd)) == NULL) 423 return EBADF; 424 if (fp->f_type != DTYPE_VNODE) { 425 notty: 426 /* Not a tty, proceed with common fcntl() */ 427 cmd = cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN; 428 break; 429 } 430 431 /* check that the vnode is a tty */ 432 vp = (struct vnode *)fp->f_data; 433 if (vp->v_type != VCHR) 434 goto notty; 435 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 436 return error; 437 d_tty = cdevsw[major(va.va_rdev)].d_tty; 438 if (!d_tty || (!(tp = (*d_tty)(va.va_rdev)))) 439 goto notty; 440 441 /* set tty pg_id appropriately */ 442 if (cmd == LINUX_F_GETOWN) { 443 retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 444 return 0; 445 } 446 if ((long)arg <= 0) { 447 pgid = -(long)arg; 448 } else { 449 struct proc *p1 = pfind((long)arg); 450 if (p1 == NULL) 451 return (ESRCH); 452 pgid = (long)p1->p_pgrp->pg_id; 453 } 454 pgrp = pgfind(pgid); 455 if (pgrp == NULL || pgrp->pg_session != p->p_session) 456 return EPERM; 457 tp->t_pgrp = pgrp; 458 return 0; 459 460 default: 461 return EOPNOTSUPP; 462 } 463 464 SCARG(&fca, fd) = fd; 465 SCARG(&fca, cmd) = cmd; 466 SCARG(&fca, arg) = arg; 467 468 return sys_fcntl(p, &fca, retval); 469 } 470 471 /* 472 * Convert a NetBSD stat structure to a Linux stat structure. 473 * Only the order of the fields and the padding in the structure 474 * is different. linux_fakedev is a machine-dependent function 475 * which optionally converts device driver major/minor numbers 476 * (XXX horrible, but what can you do against code that compares 477 * things against constant major device numbers? sigh) 478 */ 479 static void 480 bsd_to_linux_stat(bsp, lsp) 481 struct stat *bsp; 482 struct linux_stat *lsp; 483 { 484 485 lsp->lst_dev = linux_fakedev(bsp->st_dev, 0); 486 lsp->lst_ino = bsp->st_ino; 487 lsp->lst_mode = (linux_mode_t)bsp->st_mode; 488 if (bsp->st_nlink >= (1 << 15)) 489 lsp->lst_nlink = (1 << 15) - 1; 490 else 491 lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; 492 lsp->lst_uid = bsp->st_uid; 493 lsp->lst_gid = bsp->st_gid; 494 lsp->lst_rdev = linux_fakedev(bsp->st_rdev, 1); 495 lsp->lst_size = bsp->st_size; 496 lsp->lst_blksize = bsp->st_blksize; 497 lsp->lst_blocks = bsp->st_blocks; 498 lsp->lst_atime = bsp->st_atime; 499 lsp->lst_mtime = bsp->st_mtime; 500 lsp->lst_ctime = bsp->st_ctime; 501 } 502 503 /* 504 * The stat functions below are plain sailing. stat and lstat are handled 505 * by one function to avoid code duplication. 506 */ 507 int 508 linux_sys_fstat(p, v, retval) 509 struct proc *p; 510 void *v; 511 register_t *retval; 512 { 513 struct linux_sys_fstat_args /* { 514 syscallarg(int) fd; 515 syscallarg(linux_stat *) sp; 516 } */ *uap = v; 517 struct sys___fstat13_args fsa; 518 struct linux_stat tmplst; 519 struct stat *st,tmpst; 520 caddr_t sg; 521 int error; 522 523 sg = stackgap_init(p, 0); 524 525 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 526 527 SCARG(&fsa, fd) = SCARG(uap, fd); 528 SCARG(&fsa, sb) = st; 529 530 if ((error = sys___fstat13(p, &fsa, retval))) 531 return error; 532 533 if ((error = copyin(st, &tmpst, sizeof tmpst))) 534 return error; 535 536 bsd_to_linux_stat(&tmpst, &tmplst); 537 538 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 539 return error; 540 541 return 0; 542 } 543 544 static int 545 linux_stat1(p, v, retval, dolstat) 546 struct proc *p; 547 void *v; 548 register_t *retval; 549 int dolstat; 550 { 551 struct sys___stat13_args sa; 552 struct linux_stat tmplst; 553 struct stat *st, tmpst; 554 caddr_t sg; 555 int error; 556 struct linux_sys_stat_args *uap = v; 557 558 sg = stackgap_init(p, 0); 559 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 560 if (dolstat) 561 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 562 else 563 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 564 565 SCARG(&sa, ub) = st; 566 SCARG(&sa, path) = SCARG(uap, path); 567 568 if ((error = (dolstat ? sys___lstat13(p, &sa, retval) : 569 sys___stat13(p, &sa, retval)))) 570 return error; 571 572 if ((error = copyin(st, &tmpst, sizeof tmpst))) 573 return error; 574 575 bsd_to_linux_stat(&tmpst, &tmplst); 576 577 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 578 return error; 579 580 return 0; 581 } 582 583 int 584 linux_sys_stat(p, v, retval) 585 struct proc *p; 586 void *v; 587 register_t *retval; 588 { 589 struct linux_sys_stat_args /* { 590 syscallarg(const char *) path; 591 syscallarg(struct linux_stat *) sp; 592 } */ *uap = v; 593 594 return linux_stat1(p, uap, retval, 0); 595 } 596 597 /* Note: this is "newlstat" in the Linux sources */ 598 /* (we don't bother with the old lstat currently) */ 599 int 600 linux_sys_lstat(p, v, retval) 601 struct proc *p; 602 void *v; 603 register_t *retval; 604 { 605 struct linux_sys_lstat_args /* { 606 syscallarg(const char *) path; 607 syscallarg(struct linux_stat *) sp; 608 } */ *uap = v; 609 610 return linux_stat1(p, uap, retval, 1); 611 } 612 613 /* 614 * The following syscalls are mostly here because of the alternate path check. 615 */ 616 int 617 linux_sys_access(p, v, retval) 618 struct proc *p; 619 void *v; 620 register_t *retval; 621 { 622 struct linux_sys_access_args /* { 623 syscallarg(const char *) path; 624 syscallarg(int) flags; 625 } */ *uap = v; 626 caddr_t sg = stackgap_init(p, 0); 627 628 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 629 630 return sys_access(p, uap, retval); 631 } 632 633 int 634 linux_sys_unlink(p, v, retval) 635 struct proc *p; 636 void *v; 637 register_t *retval; 638 639 { 640 struct linux_sys_unlink_args /* { 641 syscallarg(const char *) path; 642 } */ *uap = v; 643 caddr_t sg = stackgap_init(p, 0); 644 645 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 646 647 return sys_unlink(p, uap, retval); 648 } 649 650 int 651 linux_sys_chdir(p, v, retval) 652 struct proc *p; 653 void *v; 654 register_t *retval; 655 { 656 struct linux_sys_chdir_args /* { 657 syscallarg(const char *) path; 658 } */ *uap = v; 659 caddr_t sg = stackgap_init(p, 0); 660 661 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 662 663 return sys_chdir(p, uap, retval); 664 } 665 666 int 667 linux_sys_mknod(p, v, retval) 668 struct proc *p; 669 void *v; 670 register_t *retval; 671 { 672 struct linux_sys_mknod_args /* { 673 syscallarg(const char *) path; 674 syscallarg(int) mode; 675 syscallarg(int) dev; 676 } */ *uap = v; 677 caddr_t sg = stackgap_init(p, 0); 678 struct sys_mkfifo_args bma; 679 680 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 681 682 /* 683 * BSD handles FIFOs separately 684 */ 685 if (SCARG(uap, mode) & S_IFIFO) { 686 SCARG(&bma, path) = SCARG(uap, path); 687 SCARG(&bma, mode) = SCARG(uap, mode); 688 return sys_mkfifo(p, uap, retval); 689 } else 690 return sys_mknod(p, uap, retval); 691 } 692 693 int 694 linux_sys_chmod(p, v, retval) 695 struct proc *p; 696 void *v; 697 register_t *retval; 698 { 699 struct linux_sys_chmod_args /* { 700 syscallarg(const char *) path; 701 syscallarg(int) mode; 702 } */ *uap = v; 703 caddr_t sg = stackgap_init(p, 0); 704 705 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 706 707 return sys_chmod(p, uap, retval); 708 } 709 710 #if defined(__i386__) || defined(__m68k__) || defined(__arm__) 711 int 712 linux_sys_chown16(p, v, retval) 713 struct proc *p; 714 void *v; 715 register_t *retval; 716 { 717 struct linux_sys_chown16_args /* { 718 syscallarg(const char *) path; 719 syscallarg(int) uid; 720 syscallarg(int) gid; 721 } */ *uap = v; 722 struct sys___posix_chown_args bca; 723 caddr_t sg = stackgap_init(p, 0); 724 725 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 726 727 SCARG(&bca, path) = SCARG(uap, path); 728 SCARG(&bca, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 729 (uid_t)-1 : SCARG(uap, uid); 730 SCARG(&bca, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 731 (gid_t)-1 : SCARG(uap, gid); 732 733 return sys___posix_chown(p, &bca, retval); 734 } 735 736 int 737 linux_sys_fchown16(p, v, retval) 738 struct proc *p; 739 void *v; 740 register_t *retval; 741 { 742 struct linux_sys_fchown16_args /* { 743 syscallarg(int) fd; 744 syscallarg(int) uid; 745 syscallarg(int) gid; 746 } */ *uap = v; 747 struct sys___posix_fchown_args bfa; 748 749 SCARG(&bfa, fd) = SCARG(uap, fd); 750 SCARG(&bfa, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 751 (uid_t)-1 : SCARG(uap, uid); 752 SCARG(&bfa, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 753 (gid_t)-1 : SCARG(uap, gid); 754 755 return sys___posix_fchown(p, &bfa, retval); 756 } 757 758 int 759 linux_sys_lchown16(p, v, retval) 760 struct proc *p; 761 void *v; 762 register_t *retval; 763 { 764 struct linux_sys_lchown16_args /* { 765 syscallarg(char *) path; 766 syscallarg(int) uid; 767 syscallarg(int) gid; 768 } */ *uap = v; 769 struct sys___posix_lchown_args bla; 770 caddr_t sg = stackgap_init(p, 0); 771 772 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 773 774 SCARG(&bla, path) = SCARG(uap, path); 775 SCARG(&bla, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 776 (uid_t)-1 : SCARG(uap, uid); 777 SCARG(&bla, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 778 (gid_t)-1 : SCARG(uap, gid); 779 780 return sys___posix_lchown(p, &bla, retval); 781 } 782 #endif /* __i386__ || __m68k__ || __arm__ */ 783 #if defined (__i386__) || defined (__m68k__) || \ 784 defined (__powerpc__) || defined (__mips__) || defined(__arm__) 785 int 786 linux_sys_chown(p, v, retval) 787 struct proc *p; 788 void *v; 789 register_t *retval; 790 { 791 struct linux_sys_chown_args /* { 792 syscallarg(char *) path; 793 syscallarg(int) uid; 794 syscallarg(int) gid; 795 } */ *uap = v; 796 caddr_t sg = stackgap_init(p, 0); 797 798 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 799 800 return sys___posix_chown(p, uap, retval); 801 } 802 803 int 804 linux_sys_lchown(p, v, retval) 805 struct proc *p; 806 void *v; 807 register_t *retval; 808 { 809 struct linux_sys_lchown_args /* { 810 syscallarg(char *) path; 811 syscallarg(int) uid; 812 syscallarg(int) gid; 813 } */ *uap = v; 814 caddr_t sg = stackgap_init(p, 0); 815 816 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 817 818 return sys___posix_lchown(p, uap, retval); 819 } 820 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 821 822 int 823 linux_sys_rename(p, v, retval) 824 struct proc *p; 825 void *v; 826 register_t *retval; 827 { 828 struct linux_sys_rename_args /* { 829 syscallarg(const char *) from; 830 syscallarg(const char *) to; 831 } */ *uap = v; 832 caddr_t sg = stackgap_init(p, 0); 833 834 CHECK_ALT_EXIST(p, &sg, SCARG(uap, from)); 835 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 836 837 return sys___posix_rename(p, uap, retval); 838 } 839 840 int 841 linux_sys_mkdir(p, v, retval) 842 struct proc *p; 843 void *v; 844 register_t *retval; 845 { 846 struct linux_sys_mkdir_args /* { 847 syscallarg(const char *) path; 848 syscallarg(int) mode; 849 } */ *uap = v; 850 caddr_t sg = stackgap_init(p, 0); 851 852 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 853 854 return sys_mkdir(p, uap, retval); 855 } 856 857 int 858 linux_sys_rmdir(p, v, retval) 859 struct proc *p; 860 void *v; 861 register_t *retval; 862 { 863 struct linux_sys_rmdir_args /* { 864 syscallarg(const char *) path; 865 } */ *uap = v; 866 caddr_t sg = stackgap_init(p, 0); 867 868 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 869 870 return sys_rmdir(p, uap, retval); 871 } 872 873 int 874 linux_sys_symlink(p, v, retval) 875 struct proc *p; 876 void *v; 877 register_t *retval; 878 { 879 struct linux_sys_symlink_args /* { 880 syscallarg(const char *) path; 881 syscallarg(const char *) to; 882 } */ *uap = v; 883 caddr_t sg = stackgap_init(p, 0); 884 885 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 886 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 887 888 return sys_symlink(p, uap, retval); 889 } 890 891 int 892 linux_sys_link(p, v, retval) 893 struct proc *p; 894 void *v; 895 register_t *retval; 896 { 897 struct linux_sys_link_args /* { 898 syscallarg(const char *) path; 899 syscallarg(const char *) link; 900 } */ *uap = v; 901 caddr_t sg = stackgap_init(p, 0); 902 903 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 904 CHECK_ALT_CREAT(p, &sg, SCARG(uap, link)); 905 906 return sys_link(p, uap, retval); 907 } 908 909 int 910 linux_sys_readlink(p, v, retval) 911 struct proc *p; 912 void *v; 913 register_t *retval; 914 { 915 struct linux_sys_readlink_args /* { 916 syscallarg(const char *) name; 917 syscallarg(char *) buf; 918 syscallarg(int) count; 919 } */ *uap = v; 920 caddr_t sg = stackgap_init(p, 0); 921 922 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, name)); 923 924 return sys_readlink(p, uap, retval); 925 } 926 927 int 928 linux_sys_truncate(p, v, retval) 929 struct proc *p; 930 void *v; 931 register_t *retval; 932 { 933 struct linux_sys_truncate_args /* { 934 syscallarg(const char *) path; 935 syscallarg(long) length; 936 } */ *uap = v; 937 caddr_t sg = stackgap_init(p, 0); 938 939 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 940 941 return compat_43_sys_truncate(p, uap, retval); 942 } 943 944 /* 945 * This is just fsync() for now (just as it is in the Linux kernel) 946 * Note: this is not implemented under Linux on Alpha and Arm 947 * but should still be defined in our syscalls.master. 948 * (syscall #148 on the arm) 949 */ 950 int 951 linux_sys_fdatasync(p, v, retval) 952 struct proc *p; 953 void *v; 954 register_t *retval; 955 { 956 #ifdef notdef 957 struct linux_sys_fdatasync_args /* { 958 syscallarg(int) fd; 959 } */ *uap = v; 960 #endif 961 return sys_fsync(p, v, retval); 962 } 963 964 /* 965 * pread(2). 966 */ 967 int 968 linux_sys_pread(p, v, retval) 969 struct proc *p; 970 void *v; 971 register_t *retval; 972 { 973 struct linux_sys_pread_args /* { 974 syscallarg(int) fd; 975 syscallarg(void *) buf; 976 syscallarg(size_t) nbyte; 977 syscallarg(linux_off_t) offset; 978 } */ *uap = v; 979 struct sys_pread_args pra; 980 981 SCARG(&pra, fd) = SCARG(uap, fd); 982 SCARG(&pra, buf) = SCARG(uap, buf); 983 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 984 SCARG(&pra, offset) = SCARG(uap, offset); 985 986 return sys_read(p, &pra, retval); 987 } 988 989 /* 990 * pwrite(2). 991 */ 992 int 993 linux_sys_pwrite(p, v, retval) 994 struct proc *p; 995 void *v; 996 register_t *retval; 997 { 998 struct linux_sys_pwrite_args /* { 999 syscallarg(int) fd; 1000 syscallarg(void *) buf; 1001 syscallarg(size_t) nbyte; 1002 syscallarg(linux_off_t) offset; 1003 } */ *uap = v; 1004 struct sys_pwrite_args pra; 1005 1006 SCARG(&pra, fd) = SCARG(uap, fd); 1007 SCARG(&pra, buf) = SCARG(uap, buf); 1008 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 1009 SCARG(&pra, offset) = SCARG(uap, offset); 1010 1011 return sys_write(p, &pra, retval); 1012 } 1013
Indexes created Thu Sep 25 16:09:42 GMT 2025