linux_file.c revision 1.51
1 /* $NetBSD: linux_file.c,v 1.51 2002/04/10 18:19:34 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 1.51 2002/04/10 18:19:34 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, 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 arg = (caddr_t)bfp; 408 break; 409 410 case LINUX_F_SETOWN: 411 case LINUX_F_GETOWN: 412 /* 413 * We need to route fcntl() for tty descriptors around normal 414 * fcntl(), since NetBSD tty TIOC{G,S}PGRP semantics is too 415 * restrictive for Linux F_{G,S}ETOWN. For non-tty descriptors, 416 * this is not a problem. 417 */ 418 fdp = p->p_fd; 419 if ((fp = fd_getfile(fdp, fd)) == NULL) 420 return EBADF; 421 /* FILE_USE() not needed here */ 422 if (fp->f_type != DTYPE_VNODE) { 423 notty: 424 /* Not a tty, proceed with common fcntl() */ 425 cmd = cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN; 426 break; 427 } 428 429 /* check that the vnode is a tty */ 430 vp = (struct vnode *)fp->f_data; 431 if (vp->v_type != VCHR) 432 goto notty; 433 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 434 return error; 435 d_tty = cdevsw[major(va.va_rdev)].d_tty; 436 if (!d_tty || (!(tp = (*d_tty)(va.va_rdev)))) 437 goto notty; 438 439 /* set tty pg_id appropriately */ 440 if (cmd == LINUX_F_GETOWN) { 441 retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 442 return 0; 443 } 444 if ((long)arg <= 0) { 445 pgid = -(long)arg; 446 } else { 447 struct proc *p1 = pfind((long)arg); 448 if (p1 == NULL) 449 return (ESRCH); 450 pgid = (long)p1->p_pgrp->pg_id; 451 } 452 pgrp = pgfind(pgid); 453 if (pgrp == NULL || pgrp->pg_session != p->p_session) 454 return EPERM; 455 tp->t_pgrp = pgrp; 456 return 0; 457 458 default: 459 return EOPNOTSUPP; 460 } 461 462 SCARG(&fca, fd) = fd; 463 SCARG(&fca, cmd) = cmd; 464 SCARG(&fca, arg) = arg; 465 466 return sys_fcntl(p, &fca, retval); 467 } 468 469 /* 470 * Convert a NetBSD stat structure to a Linux stat structure. 471 * Only the order of the fields and the padding in the structure 472 * is different. linux_fakedev is a machine-dependent function 473 * which optionally converts device driver major/minor numbers 474 * (XXX horrible, but what can you do against code that compares 475 * things against constant major device numbers? sigh) 476 */ 477 static void 478 bsd_to_linux_stat(bsp, lsp) 479 struct stat *bsp; 480 struct linux_stat *lsp; 481 { 482 483 lsp->lst_dev = linux_fakedev(bsp->st_dev, 0); 484 lsp->lst_ino = bsp->st_ino; 485 lsp->lst_mode = (linux_mode_t)bsp->st_mode; 486 if (bsp->st_nlink >= (1 << 15)) 487 lsp->lst_nlink = (1 << 15) - 1; 488 else 489 lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; 490 lsp->lst_uid = bsp->st_uid; 491 lsp->lst_gid = bsp->st_gid; 492 lsp->lst_rdev = linux_fakedev(bsp->st_rdev, 1); 493 lsp->lst_size = bsp->st_size; 494 lsp->lst_blksize = bsp->st_blksize; 495 lsp->lst_blocks = bsp->st_blocks; 496 lsp->lst_atime = bsp->st_atime; 497 lsp->lst_mtime = bsp->st_mtime; 498 lsp->lst_ctime = bsp->st_ctime; 499 } 500 501 /* 502 * The stat functions below are plain sailing. stat and lstat are handled 503 * by one function to avoid code duplication. 504 */ 505 int 506 linux_sys_fstat(p, v, retval) 507 struct proc *p; 508 void *v; 509 register_t *retval; 510 { 511 struct linux_sys_fstat_args /* { 512 syscallarg(int) fd; 513 syscallarg(linux_stat *) sp; 514 } */ *uap = v; 515 struct sys___fstat13_args fsa; 516 struct linux_stat tmplst; 517 struct stat *st,tmpst; 518 caddr_t sg; 519 int error; 520 521 sg = stackgap_init(p, 0); 522 523 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 524 525 SCARG(&fsa, fd) = SCARG(uap, fd); 526 SCARG(&fsa, sb) = st; 527 528 if ((error = sys___fstat13(p, &fsa, retval))) 529 return error; 530 531 if ((error = copyin(st, &tmpst, sizeof tmpst))) 532 return error; 533 534 bsd_to_linux_stat(&tmpst, &tmplst); 535 536 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 537 return error; 538 539 return 0; 540 } 541 542 static int 543 linux_stat1(p, v, retval, dolstat) 544 struct proc *p; 545 void *v; 546 register_t *retval; 547 int dolstat; 548 { 549 struct sys___stat13_args sa; 550 struct linux_stat tmplst; 551 struct stat *st, tmpst; 552 caddr_t sg; 553 int error; 554 struct linux_sys_stat_args *uap = v; 555 556 sg = stackgap_init(p, 0); 557 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 558 if (dolstat) 559 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 560 else 561 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 562 563 SCARG(&sa, ub) = st; 564 SCARG(&sa, path) = SCARG(uap, path); 565 566 if ((error = (dolstat ? sys___lstat13(p, &sa, retval) : 567 sys___stat13(p, &sa, retval)))) 568 return error; 569 570 if ((error = copyin(st, &tmpst, sizeof tmpst))) 571 return error; 572 573 bsd_to_linux_stat(&tmpst, &tmplst); 574 575 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 576 return error; 577 578 return 0; 579 } 580 581 int 582 linux_sys_stat(p, v, retval) 583 struct proc *p; 584 void *v; 585 register_t *retval; 586 { 587 struct linux_sys_stat_args /* { 588 syscallarg(const char *) path; 589 syscallarg(struct linux_stat *) sp; 590 } */ *uap = v; 591 592 return linux_stat1(p, uap, retval, 0); 593 } 594 595 /* Note: this is "newlstat" in the Linux sources */ 596 /* (we don't bother with the old lstat currently) */ 597 int 598 linux_sys_lstat(p, v, retval) 599 struct proc *p; 600 void *v; 601 register_t *retval; 602 { 603 struct linux_sys_lstat_args /* { 604 syscallarg(const char *) path; 605 syscallarg(struct linux_stat *) sp; 606 } */ *uap = v; 607 608 return linux_stat1(p, uap, retval, 1); 609 } 610 611 /* 612 * The following syscalls are mostly here because of the alternate path check. 613 */ 614 int 615 linux_sys_access(p, v, retval) 616 struct proc *p; 617 void *v; 618 register_t *retval; 619 { 620 struct linux_sys_access_args /* { 621 syscallarg(const char *) path; 622 syscallarg(int) flags; 623 } */ *uap = v; 624 caddr_t sg = stackgap_init(p, 0); 625 626 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 627 628 return sys_access(p, uap, retval); 629 } 630 631 int 632 linux_sys_unlink(p, v, retval) 633 struct proc *p; 634 void *v; 635 register_t *retval; 636 637 { 638 struct linux_sys_unlink_args /* { 639 syscallarg(const char *) path; 640 } */ *uap = v; 641 caddr_t sg = stackgap_init(p, 0); 642 643 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 644 645 return sys_unlink(p, uap, retval); 646 } 647 648 int 649 linux_sys_chdir(p, v, retval) 650 struct proc *p; 651 void *v; 652 register_t *retval; 653 { 654 struct linux_sys_chdir_args /* { 655 syscallarg(const char *) path; 656 } */ *uap = v; 657 caddr_t sg = stackgap_init(p, 0); 658 659 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 660 661 return sys_chdir(p, uap, retval); 662 } 663 664 int 665 linux_sys_mknod(p, v, retval) 666 struct proc *p; 667 void *v; 668 register_t *retval; 669 { 670 struct linux_sys_mknod_args /* { 671 syscallarg(const char *) path; 672 syscallarg(int) mode; 673 syscallarg(int) dev; 674 } */ *uap = v; 675 caddr_t sg = stackgap_init(p, 0); 676 struct sys_mkfifo_args bma; 677 678 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 679 680 /* 681 * BSD handles FIFOs separately 682 */ 683 if (SCARG(uap, mode) & S_IFIFO) { 684 SCARG(&bma, path) = SCARG(uap, path); 685 SCARG(&bma, mode) = SCARG(uap, mode); 686 return sys_mkfifo(p, uap, retval); 687 } else 688 return sys_mknod(p, uap, retval); 689 } 690 691 int 692 linux_sys_chmod(p, v, retval) 693 struct proc *p; 694 void *v; 695 register_t *retval; 696 { 697 struct linux_sys_chmod_args /* { 698 syscallarg(const char *) path; 699 syscallarg(int) mode; 700 } */ *uap = v; 701 caddr_t sg = stackgap_init(p, 0); 702 703 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 704 705 return sys_chmod(p, uap, retval); 706 } 707 708 #if defined(__i386__) || defined(__m68k__) || defined(__arm__) 709 int 710 linux_sys_chown16(p, v, retval) 711 struct proc *p; 712 void *v; 713 register_t *retval; 714 { 715 struct linux_sys_chown16_args /* { 716 syscallarg(const char *) path; 717 syscallarg(int) uid; 718 syscallarg(int) gid; 719 } */ *uap = v; 720 struct sys___posix_chown_args bca; 721 caddr_t sg = stackgap_init(p, 0); 722 723 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 724 725 SCARG(&bca, path) = SCARG(uap, path); 726 SCARG(&bca, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 727 (uid_t)-1 : SCARG(uap, uid); 728 SCARG(&bca, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 729 (gid_t)-1 : SCARG(uap, gid); 730 731 return sys___posix_chown(p, &bca, retval); 732 } 733 734 int 735 linux_sys_fchown16(p, v, retval) 736 struct proc *p; 737 void *v; 738 register_t *retval; 739 { 740 struct linux_sys_fchown16_args /* { 741 syscallarg(int) fd; 742 syscallarg(int) uid; 743 syscallarg(int) gid; 744 } */ *uap = v; 745 struct sys___posix_fchown_args bfa; 746 747 SCARG(&bfa, fd) = SCARG(uap, fd); 748 SCARG(&bfa, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 749 (uid_t)-1 : SCARG(uap, uid); 750 SCARG(&bfa, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 751 (gid_t)-1 : SCARG(uap, gid); 752 753 return sys___posix_fchown(p, &bfa, retval); 754 } 755 756 int 757 linux_sys_lchown16(p, v, retval) 758 struct proc *p; 759 void *v; 760 register_t *retval; 761 { 762 struct linux_sys_lchown16_args /* { 763 syscallarg(char *) path; 764 syscallarg(int) uid; 765 syscallarg(int) gid; 766 } */ *uap = v; 767 struct sys___posix_lchown_args bla; 768 caddr_t sg = stackgap_init(p, 0); 769 770 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 771 772 SCARG(&bla, path) = SCARG(uap, path); 773 SCARG(&bla, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 774 (uid_t)-1 : SCARG(uap, uid); 775 SCARG(&bla, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 776 (gid_t)-1 : SCARG(uap, gid); 777 778 return sys___posix_lchown(p, &bla, retval); 779 } 780 #endif /* __i386__ || __m68k__ || __arm__ */ 781 #if defined (__i386__) || defined (__m68k__) || \ 782 defined (__powerpc__) || defined (__mips__) || defined(__arm__) 783 int 784 linux_sys_chown(p, v, retval) 785 struct proc *p; 786 void *v; 787 register_t *retval; 788 { 789 struct linux_sys_chown_args /* { 790 syscallarg(char *) path; 791 syscallarg(int) uid; 792 syscallarg(int) gid; 793 } */ *uap = v; 794 caddr_t sg = stackgap_init(p, 0); 795 796 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 797 798 return sys___posix_chown(p, uap, retval); 799 } 800 801 int 802 linux_sys_lchown(p, v, retval) 803 struct proc *p; 804 void *v; 805 register_t *retval; 806 { 807 struct linux_sys_lchown_args /* { 808 syscallarg(char *) path; 809 syscallarg(int) uid; 810 syscallarg(int) gid; 811 } */ *uap = v; 812 caddr_t sg = stackgap_init(p, 0); 813 814 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 815 816 return sys___posix_lchown(p, uap, retval); 817 } 818 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 819 820 int 821 linux_sys_rename(p, v, retval) 822 struct proc *p; 823 void *v; 824 register_t *retval; 825 { 826 struct linux_sys_rename_args /* { 827 syscallarg(const char *) from; 828 syscallarg(const char *) to; 829 } */ *uap = v; 830 caddr_t sg = stackgap_init(p, 0); 831 832 CHECK_ALT_EXIST(p, &sg, SCARG(uap, from)); 833 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 834 835 return sys___posix_rename(p, uap, retval); 836 } 837 838 int 839 linux_sys_mkdir(p, v, retval) 840 struct proc *p; 841 void *v; 842 register_t *retval; 843 { 844 struct linux_sys_mkdir_args /* { 845 syscallarg(const char *) path; 846 syscallarg(int) mode; 847 } */ *uap = v; 848 caddr_t sg = stackgap_init(p, 0); 849 850 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 851 852 return sys_mkdir(p, uap, retval); 853 } 854 855 int 856 linux_sys_rmdir(p, v, retval) 857 struct proc *p; 858 void *v; 859 register_t *retval; 860 { 861 struct linux_sys_rmdir_args /* { 862 syscallarg(const char *) path; 863 } */ *uap = v; 864 caddr_t sg = stackgap_init(p, 0); 865 866 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 867 868 return sys_rmdir(p, uap, retval); 869 } 870 871 int 872 linux_sys_symlink(p, v, retval) 873 struct proc *p; 874 void *v; 875 register_t *retval; 876 { 877 struct linux_sys_symlink_args /* { 878 syscallarg(const char *) path; 879 syscallarg(const char *) to; 880 } */ *uap = v; 881 caddr_t sg = stackgap_init(p, 0); 882 883 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 884 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 885 886 return sys_symlink(p, uap, retval); 887 } 888 889 int 890 linux_sys_link(p, v, retval) 891 struct proc *p; 892 void *v; 893 register_t *retval; 894 { 895 struct linux_sys_link_args /* { 896 syscallarg(const char *) path; 897 syscallarg(const char *) link; 898 } */ *uap = v; 899 caddr_t sg = stackgap_init(p, 0); 900 901 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 902 CHECK_ALT_CREAT(p, &sg, SCARG(uap, link)); 903 904 return sys_link(p, uap, retval); 905 } 906 907 int 908 linux_sys_readlink(p, v, retval) 909 struct proc *p; 910 void *v; 911 register_t *retval; 912 { 913 struct linux_sys_readlink_args /* { 914 syscallarg(const char *) name; 915 syscallarg(char *) buf; 916 syscallarg(int) count; 917 } */ *uap = v; 918 caddr_t sg = stackgap_init(p, 0); 919 920 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, name)); 921 922 return sys_readlink(p, uap, retval); 923 } 924 925 int 926 linux_sys_truncate(p, v, retval) 927 struct proc *p; 928 void *v; 929 register_t *retval; 930 { 931 struct linux_sys_truncate_args /* { 932 syscallarg(const char *) path; 933 syscallarg(long) length; 934 } */ *uap = v; 935 caddr_t sg = stackgap_init(p, 0); 936 937 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 938 939 return compat_43_sys_truncate(p, uap, retval); 940 } 941 942 /* 943 * This is just fsync() for now (just as it is in the Linux kernel) 944 * Note: this is not implemented under Linux on Alpha and Arm 945 * but should still be defined in our syscalls.master. 946 * (syscall #148 on the arm) 947 */ 948 int 949 linux_sys_fdatasync(p, v, retval) 950 struct proc *p; 951 void *v; 952 register_t *retval; 953 { 954 #ifdef notdef 955 struct linux_sys_fdatasync_args /* { 956 syscallarg(int) fd; 957 } */ *uap = v; 958 #endif 959 return sys_fsync(p, v, retval); 960 } 961 962 /* 963 * pread(2). 964 */ 965 int 966 linux_sys_pread(p, v, retval) 967 struct proc *p; 968 void *v; 969 register_t *retval; 970 { 971 struct linux_sys_pread_args /* { 972 syscallarg(int) fd; 973 syscallarg(void *) buf; 974 syscallarg(size_t) nbyte; 975 syscallarg(linux_off_t) offset; 976 } */ *uap = v; 977 struct sys_pread_args pra; 978 979 SCARG(&pra, fd) = SCARG(uap, fd); 980 SCARG(&pra, buf) = SCARG(uap, buf); 981 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 982 SCARG(&pra, offset) = SCARG(uap, offset); 983 984 return sys_read(p, &pra, retval); 985 } 986 987 /* 988 * pwrite(2). 989 */ 990 int 991 linux_sys_pwrite(p, v, retval) 992 struct proc *p; 993 void *v; 994 register_t *retval; 995 { 996 struct linux_sys_pwrite_args /* { 997 syscallarg(int) fd; 998 syscallarg(void *) buf; 999 syscallarg(size_t) nbyte; 1000 syscallarg(linux_off_t) offset; 1001 } */ *uap = v; 1002 struct sys_pwrite_args pra; 1003 1004 SCARG(&pra, fd) = SCARG(uap, fd); 1005 SCARG(&pra, buf) = SCARG(uap, buf); 1006 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 1007 SCARG(&pra, offset) = SCARG(uap, offset); 1008 1009 return sys_write(p, &pra, retval); 1010 } 1011
Indexes created Thu Sep 25 16:09:42 GMT 2025