linux_file.c revision 1.57
1 /* $NetBSD: linux_file.c,v 1.57 2003/02/27 16:04:16 yamt 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 1.57 2003/02/27 16:04:16 yamt 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(p, &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(p, &sg, SCARG(uap, path)); 194 else 195 CHECK_ALT_EXIST(p, &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, p); 222 } 223 FILE_UNUSE(fp, p); 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, p); 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, p); 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() not needed here */ 431 if (fp->f_type != DTYPE_VNODE) { 432 not_tty: 433 /* Not a tty, proceed with common fcntl() */ 434 cmd = cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN; 435 break; 436 } 437 438 /* check that the vnode is a tty */ 439 vp = (struct vnode *)fp->f_data; 440 if (vp->v_type != VCHR) 441 goto not_tty; 442 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 443 return error; 444 cdev = cdevsw_lookup(va.va_rdev); 445 if (cdev == NULL) 446 return (ENXIO); 447 d_tty = cdev->d_tty; 448 if (!d_tty || (!(tp = (*d_tty)(va.va_rdev)))) 449 goto not_tty; 450 451 /* set tty pg_id appropriately */ 452 if (cmd == LINUX_F_GETOWN) { 453 retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 454 return 0; 455 } 456 if ((long)arg <= 0) { 457 pgid = -(long)arg; 458 } else { 459 struct proc *p1 = pfind((long)arg); 460 if (p1 == NULL) 461 return (ESRCH); 462 pgid = (long)p1->p_pgrp->pg_id; 463 } 464 pgrp = pgfind(pgid); 465 if (pgrp == NULL || pgrp->pg_session != p->p_session) 466 return EPERM; 467 tp->t_pgrp = pgrp; 468 return 0; 469 470 default: 471 return EOPNOTSUPP; 472 } 473 474 SCARG(&fca, fd) = fd; 475 SCARG(&fca, cmd) = cmd; 476 SCARG(&fca, arg) = arg; 477 478 return sys_fcntl(l, &fca, retval); 479 } 480 481 /* 482 * Convert a NetBSD stat structure to a Linux stat structure. 483 * Only the order of the fields and the padding in the structure 484 * is different. linux_fakedev is a machine-dependent function 485 * which optionally converts device driver major/minor numbers 486 * (XXX horrible, but what can you do against code that compares 487 * things against constant major device numbers? sigh) 488 */ 489 static void 490 bsd_to_linux_stat(bsp, lsp) 491 struct stat *bsp; 492 struct linux_stat *lsp; 493 { 494 495 lsp->lst_dev = linux_fakedev(bsp->st_dev, 0); 496 lsp->lst_ino = bsp->st_ino; 497 lsp->lst_mode = (linux_mode_t)bsp->st_mode; 498 if (bsp->st_nlink >= (1 << 15)) 499 lsp->lst_nlink = (1 << 15) - 1; 500 else 501 lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; 502 lsp->lst_uid = bsp->st_uid; 503 lsp->lst_gid = bsp->st_gid; 504 lsp->lst_rdev = linux_fakedev(bsp->st_rdev, 1); 505 lsp->lst_size = bsp->st_size; 506 lsp->lst_blksize = bsp->st_blksize; 507 lsp->lst_blocks = bsp->st_blocks; 508 lsp->lst_atime = bsp->st_atime; 509 lsp->lst_mtime = bsp->st_mtime; 510 lsp->lst_ctime = bsp->st_ctime; 511 } 512 513 /* 514 * The stat functions below are plain sailing. stat and lstat are handled 515 * by one function to avoid code duplication. 516 */ 517 int 518 linux_sys_fstat(l, v, retval) 519 struct lwp *l; 520 void *v; 521 register_t *retval; 522 { 523 struct linux_sys_fstat_args /* { 524 syscallarg(int) fd; 525 syscallarg(linux_stat *) sp; 526 } */ *uap = v; 527 struct proc *p = l->l_proc; 528 struct sys___fstat13_args fsa; 529 struct linux_stat tmplst; 530 struct stat *st,tmpst; 531 caddr_t sg; 532 int error; 533 534 sg = stackgap_init(p, 0); 535 536 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 537 538 SCARG(&fsa, fd) = SCARG(uap, fd); 539 SCARG(&fsa, sb) = st; 540 541 if ((error = sys___fstat13(l, &fsa, retval))) 542 return error; 543 544 if ((error = copyin(st, &tmpst, sizeof tmpst))) 545 return error; 546 547 bsd_to_linux_stat(&tmpst, &tmplst); 548 549 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 550 return error; 551 552 return 0; 553 } 554 555 static int 556 linux_stat1(l, v, retval, dolstat) 557 struct lwp *l; 558 void *v; 559 register_t *retval; 560 int dolstat; 561 { 562 struct sys___stat13_args sa; 563 struct linux_stat tmplst; 564 struct stat *st, tmpst; 565 struct proc *p = l->l_proc; 566 caddr_t sg; 567 int error; 568 struct linux_sys_stat_args *uap = v; 569 570 sg = stackgap_init(p, 0); 571 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 572 if (dolstat) 573 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 574 else 575 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 576 577 SCARG(&sa, ub) = st; 578 SCARG(&sa, path) = SCARG(uap, path); 579 580 if ((error = (dolstat ? sys___lstat13(l, &sa, retval) : 581 sys___stat13(l, &sa, retval)))) 582 return error; 583 584 if ((error = copyin(st, &tmpst, sizeof tmpst))) 585 return error; 586 587 bsd_to_linux_stat(&tmpst, &tmplst); 588 589 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 590 return error; 591 592 return 0; 593 } 594 595 int 596 linux_sys_stat(l, v, retval) 597 struct lwp *l; 598 void *v; 599 register_t *retval; 600 { 601 struct linux_sys_stat_args /* { 602 syscallarg(const char *) path; 603 syscallarg(struct linux_stat *) sp; 604 } */ *uap = v; 605 606 return linux_stat1(l, uap, retval, 0); 607 } 608 609 /* Note: this is "newlstat" in the Linux sources */ 610 /* (we don't bother with the old lstat currently) */ 611 int 612 linux_sys_lstat(l, v, retval) 613 struct lwp *l; 614 void *v; 615 register_t *retval; 616 { 617 struct linux_sys_lstat_args /* { 618 syscallarg(const char *) path; 619 syscallarg(struct linux_stat *) sp; 620 } */ *uap = v; 621 622 return linux_stat1(l, uap, retval, 1); 623 } 624 625 /* 626 * The following syscalls are mostly here because of the alternate path check. 627 */ 628 int 629 linux_sys_access(l, v, retval) 630 struct lwp *l; 631 void *v; 632 register_t *retval; 633 { 634 struct linux_sys_access_args /* { 635 syscallarg(const char *) path; 636 syscallarg(int) flags; 637 } */ *uap = v; 638 struct proc *p = l->l_proc; 639 caddr_t sg = stackgap_init(p, 0); 640 641 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 642 643 return sys_access(l, uap, retval); 644 } 645 646 int 647 linux_sys_unlink(l, v, retval) 648 struct lwp *l; 649 void *v; 650 register_t *retval; 651 652 { 653 struct linux_sys_unlink_args /* { 654 syscallarg(const char *) path; 655 } */ *uap = v; 656 struct proc *p = l->l_proc; 657 caddr_t sg = stackgap_init(p, 0); 658 659 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 660 661 return sys_unlink(l, uap, retval); 662 } 663 664 int 665 linux_sys_chdir(l, v, retval) 666 struct lwp *l; 667 void *v; 668 register_t *retval; 669 { 670 struct linux_sys_chdir_args /* { 671 syscallarg(const char *) path; 672 } */ *uap = v; 673 struct proc *p = l->l_proc; 674 caddr_t sg = stackgap_init(p, 0); 675 676 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 677 678 return sys_chdir(l, uap, retval); 679 } 680 681 int 682 linux_sys_mknod(l, v, retval) 683 struct lwp *l; 684 void *v; 685 register_t *retval; 686 { 687 struct linux_sys_mknod_args /* { 688 syscallarg(const char *) path; 689 syscallarg(int) mode; 690 syscallarg(int) dev; 691 } */ *uap = v; 692 struct proc *p = l->l_proc; 693 caddr_t sg = stackgap_init(p, 0); 694 695 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 696 697 /* 698 * BSD handles FIFOs separately 699 */ 700 if (SCARG(uap, mode) & S_IFIFO) { 701 struct sys_mkfifo_args bma; 702 703 SCARG(&bma, path) = SCARG(uap, path); 704 SCARG(&bma, mode) = SCARG(uap, mode); 705 return sys_mkfifo(l, &bma, retval); 706 } else { 707 struct sys_mknod_args bma; 708 709 SCARG(&bma, path) = SCARG(uap, path); 710 SCARG(&bma, mode) = SCARG(uap, mode); 711 /* 712 * Linux device numbers uses 8 bits for minor and 8 bits 713 * for major. Due to how we map our major and minor, 714 * this just fints into our dev_t. Just mask off the 715 * upper 16bit to remove any random junk. 716 */ 717 SCARG(&bma, dev) = SCARG(uap, dev) & 0xffff; 718 return sys_mknod(l, &bma, retval); 719 } 720 } 721 722 int 723 linux_sys_chmod(l, v, retval) 724 struct lwp *l; 725 void *v; 726 register_t *retval; 727 { 728 struct linux_sys_chmod_args /* { 729 syscallarg(const char *) path; 730 syscallarg(int) mode; 731 } */ *uap = v; 732 struct proc *p = l->l_proc; 733 caddr_t sg = stackgap_init(p, 0); 734 735 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 736 737 return sys_chmod(l, uap, retval); 738 } 739 740 #if defined(__i386__) || defined(__m68k__) || defined(__arm__) 741 int 742 linux_sys_chown16(l, v, retval) 743 struct lwp *l; 744 void *v; 745 register_t *retval; 746 { 747 struct linux_sys_chown16_args /* { 748 syscallarg(const char *) path; 749 syscallarg(int) uid; 750 syscallarg(int) gid; 751 } */ *uap = v; 752 struct proc *p = l->l_proc; 753 struct sys___posix_chown_args bca; 754 caddr_t sg = stackgap_init(p, 0); 755 756 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 757 758 SCARG(&bca, path) = SCARG(uap, path); 759 SCARG(&bca, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 760 (uid_t)-1 : SCARG(uap, uid); 761 SCARG(&bca, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 762 (gid_t)-1 : SCARG(uap, gid); 763 764 return sys___posix_chown(l, &bca, retval); 765 } 766 767 int 768 linux_sys_fchown16(l, v, retval) 769 struct lwp *l; 770 void *v; 771 register_t *retval; 772 { 773 struct linux_sys_fchown16_args /* { 774 syscallarg(int) fd; 775 syscallarg(int) uid; 776 syscallarg(int) gid; 777 } */ *uap = v; 778 struct sys___posix_fchown_args bfa; 779 780 SCARG(&bfa, fd) = SCARG(uap, fd); 781 SCARG(&bfa, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 782 (uid_t)-1 : SCARG(uap, uid); 783 SCARG(&bfa, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 784 (gid_t)-1 : SCARG(uap, gid); 785 786 return sys___posix_fchown(l, &bfa, retval); 787 } 788 789 int 790 linux_sys_lchown16(l, v, retval) 791 struct lwp *l; 792 void *v; 793 register_t *retval; 794 { 795 struct linux_sys_lchown16_args /* { 796 syscallarg(char *) path; 797 syscallarg(int) uid; 798 syscallarg(int) gid; 799 } */ *uap = v; 800 struct proc *p = l->l_proc; 801 struct sys___posix_lchown_args bla; 802 caddr_t sg = stackgap_init(p, 0); 803 804 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 805 806 SCARG(&bla, path) = SCARG(uap, path); 807 SCARG(&bla, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 808 (uid_t)-1 : SCARG(uap, uid); 809 SCARG(&bla, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 810 (gid_t)-1 : SCARG(uap, gid); 811 812 return sys___posix_lchown(l, &bla, retval); 813 } 814 #endif /* __i386__ || __m68k__ || __arm__ */ 815 #if defined (__i386__) || defined (__m68k__) || \ 816 defined (__powerpc__) || defined (__mips__) || defined(__arm__) 817 int 818 linux_sys_chown(l, v, retval) 819 struct lwp *l; 820 void *v; 821 register_t *retval; 822 { 823 struct linux_sys_chown_args /* { 824 syscallarg(char *) path; 825 syscallarg(int) uid; 826 syscallarg(int) gid; 827 } */ *uap = v; 828 struct proc *p = l->l_proc; 829 caddr_t sg = stackgap_init(p, 0); 830 831 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 832 833 return sys___posix_chown(l, uap, retval); 834 } 835 836 int 837 linux_sys_lchown(l, v, retval) 838 struct lwp *l; 839 void *v; 840 register_t *retval; 841 { 842 struct linux_sys_lchown_args /* { 843 syscallarg(char *) path; 844 syscallarg(int) uid; 845 syscallarg(int) gid; 846 } */ *uap = v; 847 struct proc *p = l->l_proc; 848 caddr_t sg = stackgap_init(p, 0); 849 850 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 851 852 return sys___posix_lchown(l, uap, retval); 853 } 854 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 855 856 int 857 linux_sys_rename(l, v, retval) 858 struct lwp *l; 859 void *v; 860 register_t *retval; 861 { 862 struct linux_sys_rename_args /* { 863 syscallarg(const char *) from; 864 syscallarg(const char *) to; 865 } */ *uap = v; 866 struct proc *p = l->l_proc; 867 caddr_t sg = stackgap_init(p, 0); 868 869 CHECK_ALT_EXIST(p, &sg, SCARG(uap, from)); 870 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 871 872 return sys___posix_rename(l, uap, retval); 873 } 874 875 int 876 linux_sys_mkdir(l, v, retval) 877 struct lwp *l; 878 void *v; 879 register_t *retval; 880 { 881 struct linux_sys_mkdir_args /* { 882 syscallarg(const char *) path; 883 syscallarg(int) mode; 884 } */ *uap = v; 885 struct proc *p = l->l_proc; 886 caddr_t sg = stackgap_init(p, 0); 887 888 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 889 890 return sys_mkdir(l, uap, retval); 891 } 892 893 int 894 linux_sys_rmdir(l, v, retval) 895 struct lwp *l; 896 void *v; 897 register_t *retval; 898 { 899 struct linux_sys_rmdir_args /* { 900 syscallarg(const char *) path; 901 } */ *uap = v; 902 struct proc *p = l->l_proc; 903 caddr_t sg = stackgap_init(p, 0); 904 905 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 906 907 return sys_rmdir(l, uap, retval); 908 } 909 910 int 911 linux_sys_symlink(l, v, retval) 912 struct lwp *l; 913 void *v; 914 register_t *retval; 915 { 916 struct linux_sys_symlink_args /* { 917 syscallarg(const char *) path; 918 syscallarg(const char *) to; 919 } */ *uap = v; 920 struct proc *p = l->l_proc; 921 caddr_t sg = stackgap_init(p, 0); 922 923 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 924 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 925 926 return sys_symlink(l, uap, retval); 927 } 928 929 int 930 linux_sys_link(l, v, retval) 931 struct lwp *l; 932 void *v; 933 register_t *retval; 934 { 935 struct linux_sys_link_args /* { 936 syscallarg(const char *) path; 937 syscallarg(const char *) link; 938 } */ *uap = v; 939 struct proc *p = l->l_proc; 940 caddr_t sg = stackgap_init(p, 0); 941 942 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 943 CHECK_ALT_CREAT(p, &sg, SCARG(uap, link)); 944 945 return sys_link(l, uap, retval); 946 } 947 948 int 949 linux_sys_readlink(l, v, retval) 950 struct lwp *l; 951 void *v; 952 register_t *retval; 953 { 954 struct linux_sys_readlink_args /* { 955 syscallarg(const char *) name; 956 syscallarg(char *) buf; 957 syscallarg(int) count; 958 } */ *uap = v; 959 struct proc *p = l->l_proc; 960 caddr_t sg = stackgap_init(p, 0); 961 962 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, name)); 963 964 return sys_readlink(l, uap, retval); 965 } 966 967 int 968 linux_sys_truncate(l, v, retval) 969 struct lwp *l; 970 void *v; 971 register_t *retval; 972 { 973 struct linux_sys_truncate_args /* { 974 syscallarg(const char *) path; 975 syscallarg(long) length; 976 } */ *uap = v; 977 struct proc *p = l->l_proc; 978 caddr_t sg = stackgap_init(p, 0); 979 980 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 981 982 return compat_43_sys_truncate(l, uap, retval); 983 } 984 985 /* 986 * This is just fsync() for now (just as it is in the Linux kernel) 987 * Note: this is not implemented under Linux on Alpha and Arm 988 * but should still be defined in our syscalls.master. 989 * (syscall #148 on the arm) 990 */ 991 int 992 linux_sys_fdatasync(l, v, retval) 993 struct lwp *l; 994 void *v; 995 register_t *retval; 996 { 997 #ifdef notdef 998 struct linux_sys_fdatasync_args /* { 999 syscallarg(int) fd; 1000 } */ *uap = v; 1001 #endif 1002 return sys_fsync(l, v, retval); 1003 } 1004 1005 /* 1006 * pread(2). 1007 */ 1008 int 1009 linux_sys_pread(l, v, retval) 1010 struct lwp *l; 1011 void *v; 1012 register_t *retval; 1013 { 1014 struct linux_sys_pread_args /* { 1015 syscallarg(int) fd; 1016 syscallarg(void *) buf; 1017 syscallarg(size_t) nbyte; 1018 syscallarg(linux_off_t) offset; 1019 } */ *uap = v; 1020 struct sys_pread_args pra; 1021 1022 SCARG(&pra, fd) = SCARG(uap, fd); 1023 SCARG(&pra, buf) = SCARG(uap, buf); 1024 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 1025 SCARG(&pra, offset) = SCARG(uap, offset); 1026 1027 return sys_read(l, &pra, retval); 1028 } 1029 1030 /* 1031 * pwrite(2). 1032 */ 1033 int 1034 linux_sys_pwrite(l, v, retval) 1035 struct lwp *l; 1036 void *v; 1037 register_t *retval; 1038 { 1039 struct linux_sys_pwrite_args /* { 1040 syscallarg(int) fd; 1041 syscallarg(void *) buf; 1042 syscallarg(size_t) nbyte; 1043 syscallarg(linux_off_t) offset; 1044 } */ *uap = v; 1045 struct sys_pwrite_args pra; 1046 1047 SCARG(&pra, fd) = SCARG(uap, fd); 1048 SCARG(&pra, buf) = SCARG(uap, buf); 1049 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 1050 SCARG(&pra, offset) = SCARG(uap, offset); 1051 1052 return sys_write(l, &pra, retval); 1053 } 1054
Indexes created Thu Sep 25 16:09:42 GMT 2025