linux_file.c revision 1.37.2.7
1 /* $NetBSD: linux_file.c,v 1.37.2.7 2002/02/28 04:12:55 nathanw 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 1.37.2.7 2002/02/28 04:12:55 nathanw 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 lwp *, 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(l, v, retval) 143 struct lwp *l; 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 proc *p = l->l_proc; 152 struct sys_open_args oa; 153 caddr_t sg; 154 155 sg = stackgap_init(p->p_emul); 156 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 157 158 SCARG(&oa, path) = SCARG(uap, path); 159 SCARG(&oa, flags) = O_CREAT | O_TRUNC | O_WRONLY; 160 SCARG(&oa, mode) = SCARG(uap, mode); 161 162 return sys_open(l, &oa, retval); 163 } 164 165 /* 166 * open(2). Take care of the different flag values, and let the 167 * NetBSD syscall do the real work. See if this operation 168 * gives the current process a controlling terminal. 169 * (XXX is this necessary?) 170 */ 171 int 172 linux_sys_open(l, v, retval) 173 struct lwp *l; 174 void *v; 175 register_t *retval; 176 { 177 struct linux_sys_open_args /* { 178 syscallarg(const char *) path; 179 syscallarg(int) flags; 180 syscallarg(int) mode; 181 } */ *uap = v; 182 struct proc *p = l->l_proc; 183 int error, fl; 184 struct sys_open_args boa; 185 caddr_t sg; 186 187 sg = stackgap_init(p->p_emul); 188 189 fl = linux_to_bsd_ioflags(SCARG(uap, flags)); 190 191 if (fl & O_CREAT) 192 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 193 else 194 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 195 196 SCARG(&boa, path) = SCARG(uap, path); 197 SCARG(&boa, flags) = fl; 198 SCARG(&boa, mode) = SCARG(uap, mode); 199 200 if ((error = sys_open(l, &boa, retval))) 201 return error; 202 203 /* 204 * this bit from sunos_misc.c (and svr4_fcntl.c). 205 * If we are a session leader, and we don't have a controlling 206 * terminal yet, and the O_NOCTTY flag is not set, try to make 207 * this the controlling terminal. 208 */ 209 if (!(fl & O_NOCTTY) && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) { 210 struct filedesc *fdp = p->p_fd; 211 struct file *fp; 212 213 fp = fd_getfile(fdp, *retval); 214 215 /* ignore any error, just give it a try */ 216 if (fp != NULL && fp->f_type == DTYPE_VNODE) 217 (fp->f_ops->fo_ioctl) (fp, TIOCSCTTY, (caddr_t) 0, p); 218 } 219 return 0; 220 } 221 222 /* 223 * The next two functions take care of converting the flock 224 * structure back and forth between Linux and NetBSD format. 225 * The only difference in the structures is the order of 226 * the fields, and the 'whence' value. 227 */ 228 static void 229 bsd_to_linux_flock(bfp, lfp) 230 struct flock *bfp; 231 struct linux_flock *lfp; 232 { 233 234 lfp->l_start = bfp->l_start; 235 lfp->l_len = bfp->l_len; 236 lfp->l_pid = bfp->l_pid; 237 lfp->l_whence = bfp->l_whence; 238 switch (bfp->l_type) { 239 case F_RDLCK: 240 lfp->l_type = LINUX_F_RDLCK; 241 break; 242 case F_UNLCK: 243 lfp->l_type = LINUX_F_UNLCK; 244 break; 245 case F_WRLCK: 246 lfp->l_type = LINUX_F_WRLCK; 247 break; 248 } 249 } 250 251 static void 252 linux_to_bsd_flock(lfp, bfp) 253 struct linux_flock *lfp; 254 struct flock *bfp; 255 { 256 257 bfp->l_start = lfp->l_start; 258 bfp->l_len = lfp->l_len; 259 bfp->l_pid = lfp->l_pid; 260 bfp->l_whence = lfp->l_whence; 261 switch (lfp->l_type) { 262 case LINUX_F_RDLCK: 263 bfp->l_type = F_RDLCK; 264 break; 265 case LINUX_F_UNLCK: 266 bfp->l_type = F_UNLCK; 267 break; 268 case LINUX_F_WRLCK: 269 bfp->l_type = F_WRLCK; 270 break; 271 } 272 } 273 274 /* 275 * Most actions in the fcntl() call are straightforward; simply 276 * pass control to the NetBSD system call. A few commands need 277 * conversions after the actual system call has done its work, 278 * because the flag values and lock structure are different. 279 */ 280 int 281 linux_sys_fcntl(l, v, retval) 282 struct lwp *l; 283 void *v; 284 register_t *retval; 285 { 286 struct linux_sys_fcntl_args /* { 287 syscallarg(int) fd; 288 syscallarg(int) cmd; 289 syscallarg(void *) arg; 290 } */ *uap = v; 291 struct proc *p = l->l_proc; 292 int fd, cmd, error; 293 u_long val; 294 caddr_t arg, sg; 295 struct linux_flock lfl; 296 struct flock *bfp, bfl; 297 struct sys_fcntl_args fca; 298 struct filedesc *fdp; 299 struct file *fp; 300 struct vnode *vp; 301 struct vattr va; 302 long pgid; 303 struct pgrp *pgrp; 304 struct tty *tp, *(*d_tty) __P((dev_t)); 305 306 fd = SCARG(uap, fd); 307 cmd = SCARG(uap, cmd); 308 arg = (caddr_t) SCARG(uap, arg); 309 310 switch (cmd) { 311 case LINUX_F_DUPFD: 312 cmd = F_DUPFD; 313 break; 314 case LINUX_F_GETFD: 315 cmd = F_GETFD; 316 break; 317 case LINUX_F_SETFD: 318 cmd = F_SETFD; 319 break; 320 case LINUX_F_GETFL: 321 SCARG(&fca, fd) = fd; 322 SCARG(&fca, cmd) = F_GETFL; 323 SCARG(&fca, arg) = arg; 324 if ((error = sys_fcntl(l, &fca, retval))) 325 return error; 326 retval[0] = bsd_to_linux_ioflags(retval[0]); 327 return 0; 328 case LINUX_F_SETFL: { 329 struct file *fp = NULL; 330 331 val = linux_to_bsd_ioflags((unsigned long)SCARG(uap, arg)); 332 /* 333 * Linux seems to have same semantics for sending SIGIO to the 334 * read side of socket, but slighly different semantics 335 * for SIGIO to the write side. Rather than sending the SIGIO 336 * every time it's possible to write (directly) more data, it 337 * only sends SIGIO if last write(2) failed due to insufficient 338 * memory to hold the data. This is compatible enough 339 * with NetBSD semantics to not do anything about the 340 * difference. 341 * 342 * Linux does NOT send SIGIO for pipes. Deal with socketpair 343 * ones and DTYPE_PIPE ones. For these, we don't set 344 * the underlying flags (we don't pass O_ASYNC flag down 345 * to sys_fcntl()), but set the FASYNC flag for file descriptor, 346 * so that F_GETFL would report the ASYNC i/o is on. 347 */ 348 if (val & O_ASYNC) { 349 if (((fp = fd_getfile(p->p_fd, fd)) == NULL)) 350 return (EBADF); 351 352 FILE_USE(fp); 353 354 if (((fp->f_type == DTYPE_SOCKET) && fp->f_data 355 && ((struct socket *)fp->f_data)->so_state & SS_ISAPIPE) 356 || (fp->f_type == DTYPE_PIPE)) 357 val &= ~O_ASYNC; 358 else { 359 /* not a pipe, do not modify anything */ 360 FILE_UNUSE(fp, p); 361 fp = NULL; 362 } 363 } 364 365 SCARG(&fca, fd) = fd; 366 SCARG(&fca, cmd) = F_SETFL; 367 SCARG(&fca, arg) = (caddr_t) val; 368 369 error = sys_fcntl(l, &fca, retval); 370 371 /* Now set the FASYNC flag for pipes */ 372 if (fp) { 373 if (!error) 374 fp->f_flag |= FASYNC; 375 FILE_UNUSE(fp, p); 376 } 377 378 return (error); 379 } 380 case LINUX_F_GETLK: 381 sg = stackgap_init(p->p_emul); 382 bfp = (struct flock *) stackgap_alloc(&sg, sizeof *bfp); 383 if ((error = copyin(arg, &lfl, sizeof lfl))) 384 return error; 385 linux_to_bsd_flock(&lfl, &bfl); 386 if ((error = copyout(&bfl, bfp, sizeof bfl))) 387 return error; 388 SCARG(&fca, fd) = fd; 389 SCARG(&fca, cmd) = F_GETLK; 390 SCARG(&fca, arg) = bfp; 391 if ((error = sys_fcntl(l, &fca, retval))) 392 return error; 393 if ((error = copyin(bfp, &bfl, sizeof bfl))) 394 return error; 395 bsd_to_linux_flock(&bfl, &lfl); 396 return copyout(&lfl, arg, sizeof lfl); 397 break; 398 case LINUX_F_SETLK: 399 case LINUX_F_SETLKW: 400 cmd = (cmd == LINUX_F_SETLK ? F_SETLK : F_SETLKW); 401 if ((error = copyin(arg, &lfl, sizeof lfl))) 402 return error; 403 linux_to_bsd_flock(&lfl, &bfl); 404 sg = stackgap_init(p->p_emul); 405 bfp = (struct flock *) stackgap_alloc(&sg, sizeof *bfp); 406 if ((error = copyout(&bfl, bfp, sizeof bfl))) 407 return error; 408 SCARG(&fca, fd) = fd; 409 SCARG(&fca, cmd) = cmd; 410 SCARG(&fca, arg) = bfp; 411 return sys_fcntl(l, &fca, retval); 412 break; 413 case LINUX_F_SETOWN: 414 case LINUX_F_GETOWN: 415 /* 416 * We need to route around the normal fcntl() for these calls, 417 * since it uses TIOC{G,S}PGRP, which is too restrictive for 418 * Linux F_{G,S}ETOWN semantics. For sockets, this problem 419 * does not exist. 420 */ 421 fdp = p->p_fd; 422 if ((fp = fd_getfile(fdp, fd)) == NULL) 423 return EBADF; 424 if (fp->f_type == DTYPE_SOCKET) { 425 cmd = cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN; 426 break; 427 } 428 vp = (struct vnode *)fp->f_data; 429 if (vp->v_type != VCHR) 430 return EINVAL; 431 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 432 return error; 433 d_tty = cdevsw[major(va.va_rdev)].d_tty; 434 if (!d_tty || (!(tp = (*d_tty)(va.va_rdev)))) 435 return EINVAL; 436 if (cmd == LINUX_F_GETOWN) { 437 retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 438 return 0; 439 } 440 if ((long)arg <= 0) { 441 pgid = -(long)arg; 442 } else { 443 struct proc *p1 = pfind((long)arg); 444 if (p1 == 0) 445 return (ESRCH); 446 pgid = (long)p1->p_pgrp->pg_id; 447 } 448 pgrp = pgfind(pgid); 449 if (pgrp == NULL || pgrp->pg_session != p->p_session) 450 return EPERM; 451 tp->t_pgrp = pgrp; 452 return 0; 453 default: 454 return EOPNOTSUPP; 455 } 456 457 SCARG(&fca, fd) = fd; 458 SCARG(&fca, cmd) = cmd; 459 SCARG(&fca, arg) = arg; 460 461 return sys_fcntl(l, &fca, retval); 462 } 463 464 /* 465 * Convert a NetBSD stat structure to a Linux stat structure. 466 * Only the order of the fields and the padding in the structure 467 * is different. linux_fakedev is a machine-dependent function 468 * which optionally converts device driver major/minor numbers 469 * (XXX horrible, but what can you do against code that compares 470 * things against constant major device numbers? sigh) 471 */ 472 static void 473 bsd_to_linux_stat(bsp, lsp) 474 struct stat *bsp; 475 struct linux_stat *lsp; 476 { 477 478 lsp->lst_dev = linux_fakedev(bsp->st_dev, 0); 479 lsp->lst_ino = bsp->st_ino; 480 lsp->lst_mode = (linux_mode_t)bsp->st_mode; 481 if (bsp->st_nlink >= (1 << 15)) 482 lsp->lst_nlink = (1 << 15) - 1; 483 else 484 lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; 485 lsp->lst_uid = bsp->st_uid; 486 lsp->lst_gid = bsp->st_gid; 487 lsp->lst_rdev = linux_fakedev(bsp->st_rdev, 1); 488 lsp->lst_size = bsp->st_size; 489 lsp->lst_blksize = bsp->st_blksize; 490 lsp->lst_blocks = bsp->st_blocks; 491 lsp->lst_atime = bsp->st_atime; 492 lsp->lst_mtime = bsp->st_mtime; 493 lsp->lst_ctime = bsp->st_ctime; 494 } 495 496 /* 497 * The stat functions below are plain sailing. stat and lstat are handled 498 * by one function to avoid code duplication. 499 */ 500 int 501 linux_sys_fstat(l, v, retval) 502 struct lwp *l; 503 void *v; 504 register_t *retval; 505 { 506 struct linux_sys_fstat_args /* { 507 syscallarg(int) fd; 508 syscallarg(linux_stat *) sp; 509 } */ *uap = v; 510 struct proc *p = l->l_proc; 511 struct sys___fstat13_args fsa; 512 struct linux_stat tmplst; 513 struct stat *st,tmpst; 514 caddr_t sg; 515 int error; 516 517 sg = stackgap_init(p->p_emul); 518 519 st = stackgap_alloc(&sg, sizeof (struct stat)); 520 521 SCARG(&fsa, fd) = SCARG(uap, fd); 522 SCARG(&fsa, sb) = st; 523 524 if ((error = sys___fstat13(l, &fsa, retval))) 525 return error; 526 527 if ((error = copyin(st, &tmpst, sizeof tmpst))) 528 return error; 529 530 bsd_to_linux_stat(&tmpst, &tmplst); 531 532 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 533 return error; 534 535 return 0; 536 } 537 538 static int 539 linux_stat1(l, v, retval, dolstat) 540 struct lwp *l; 541 void *v; 542 register_t *retval; 543 int dolstat; 544 { 545 struct sys___stat13_args sa; 546 struct linux_stat tmplst; 547 struct stat *st, tmpst; 548 struct proc *p = l->l_proc; 549 caddr_t sg; 550 int error; 551 struct linux_sys_stat_args *uap = v; 552 553 sg = stackgap_init(p->p_emul); 554 st = stackgap_alloc(&sg, sizeof (struct stat)); 555 if (dolstat) 556 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 557 else 558 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 559 560 SCARG(&sa, ub) = st; 561 SCARG(&sa, path) = SCARG(uap, path); 562 563 if ((error = (dolstat ? sys___lstat13(l, &sa, retval) : 564 sys___stat13(l, &sa, retval)))) 565 return error; 566 567 if ((error = copyin(st, &tmpst, sizeof tmpst))) 568 return error; 569 570 bsd_to_linux_stat(&tmpst, &tmplst); 571 572 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 573 return error; 574 575 return 0; 576 } 577 578 int 579 linux_sys_stat(l, v, retval) 580 struct lwp *l; 581 void *v; 582 register_t *retval; 583 { 584 struct linux_sys_stat_args /* { 585 syscallarg(const char *) path; 586 syscallarg(struct linux_stat *) sp; 587 } */ *uap = v; 588 589 return linux_stat1(l, uap, retval, 0); 590 } 591 592 /* Note: this is "newlstat" in the Linux sources */ 593 /* (we don't bother with the old lstat currently) */ 594 int 595 linux_sys_lstat(l, v, retval) 596 struct lwp *l; 597 void *v; 598 register_t *retval; 599 { 600 struct linux_sys_lstat_args /* { 601 syscallarg(const char *) path; 602 syscallarg(struct linux_stat *) sp; 603 } */ *uap = v; 604 605 return linux_stat1(l, uap, retval, 1); 606 } 607 608 /* 609 * The following syscalls are mostly here because of the alternate path check. 610 */ 611 int 612 linux_sys_access(l, v, retval) 613 struct lwp *l; 614 void *v; 615 register_t *retval; 616 { 617 struct linux_sys_access_args /* { 618 syscallarg(const char *) path; 619 syscallarg(int) flags; 620 } */ *uap = v; 621 struct proc *p = l->l_proc; 622 caddr_t sg = stackgap_init(p->p_emul); 623 624 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 625 626 return sys_access(l, uap, retval); 627 } 628 629 int 630 linux_sys_unlink(l, v, retval) 631 struct lwp *l; 632 void *v; 633 register_t *retval; 634 635 { 636 struct linux_sys_unlink_args /* { 637 syscallarg(const char *) path; 638 } */ *uap = v; 639 struct proc *p = l->l_proc; 640 caddr_t sg = stackgap_init(p->p_emul); 641 642 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 643 644 return sys_unlink(l, uap, retval); 645 } 646 647 int 648 linux_sys_chdir(l, v, retval) 649 struct lwp *l; 650 void *v; 651 register_t *retval; 652 { 653 struct linux_sys_chdir_args /* { 654 syscallarg(const char *) path; 655 } */ *uap = v; 656 struct proc *p = l->l_proc; 657 caddr_t sg = stackgap_init(p->p_emul); 658 659 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 660 661 return sys_chdir(l, uap, retval); 662 } 663 664 int 665 linux_sys_mknod(l, v, retval) 666 struct lwp *l; 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 struct proc *p = l->l_proc; 676 caddr_t sg = stackgap_init(p->p_emul); 677 struct sys_mkfifo_args bma; 678 679 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 680 681 /* 682 * BSD handles FIFOs separately 683 */ 684 if (SCARG(uap, mode) & S_IFIFO) { 685 SCARG(&bma, path) = SCARG(uap, path); 686 SCARG(&bma, mode) = SCARG(uap, mode); 687 return sys_mkfifo(l, uap, retval); 688 } else 689 return sys_mknod(l, uap, retval); 690 } 691 692 int 693 linux_sys_chmod(l, v, retval) 694 struct lwp *l; 695 void *v; 696 register_t *retval; 697 { 698 struct linux_sys_chmod_args /* { 699 syscallarg(const char *) path; 700 syscallarg(int) mode; 701 } */ *uap = v; 702 struct proc *p = l->l_proc; 703 caddr_t sg = stackgap_init(p->p_emul); 704 705 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 706 707 return sys_chmod(l, uap, retval); 708 } 709 710 #if defined(__i386__) || defined(__m68k__) || defined(__arm__) 711 int 712 linux_sys_chown16(l, v, retval) 713 struct lwp *l; 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 proc *p = l->l_proc; 723 struct sys___posix_chown_args bca; 724 caddr_t sg = stackgap_init(p->p_emul); 725 726 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 727 728 SCARG(&bca, path) = SCARG(uap, path); 729 SCARG(&bca, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 730 (uid_t)-1 : SCARG(uap, uid); 731 SCARG(&bca, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 732 (gid_t)-1 : SCARG(uap, gid); 733 734 return sys___posix_chown(l, &bca, retval); 735 } 736 737 int 738 linux_sys_fchown16(l, v, retval) 739 struct lwp *l; 740 void *v; 741 register_t *retval; 742 { 743 struct linux_sys_fchown16_args /* { 744 syscallarg(int) fd; 745 syscallarg(int) uid; 746 syscallarg(int) gid; 747 } */ *uap = v; 748 struct sys___posix_fchown_args bfa; 749 750 SCARG(&bfa, fd) = SCARG(uap, fd); 751 SCARG(&bfa, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 752 (uid_t)-1 : SCARG(uap, uid); 753 SCARG(&bfa, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 754 (gid_t)-1 : SCARG(uap, gid); 755 756 return sys___posix_fchown(l, &bfa, retval); 757 } 758 759 int 760 linux_sys_lchown16(l, v, retval) 761 struct lwp *l; 762 void *v; 763 register_t *retval; 764 { 765 struct linux_sys_lchown16_args /* { 766 syscallarg(char *) path; 767 syscallarg(int) uid; 768 syscallarg(int) gid; 769 } */ *uap = v; 770 struct proc *p = l->l_proc; 771 struct sys___posix_lchown_args bla; 772 caddr_t sg = stackgap_init(p->p_emul); 773 774 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 775 776 SCARG(&bla, path) = SCARG(uap, path); 777 SCARG(&bla, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 778 (uid_t)-1 : SCARG(uap, uid); 779 SCARG(&bla, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 780 (gid_t)-1 : SCARG(uap, gid); 781 782 return sys___posix_lchown(l, &bla, retval); 783 } 784 #endif /* __i386__ || __m68k__ || __arm__ */ 785 #if defined (__i386__) || defined (__m68k__) || \ 786 defined (__powerpc__) || defined (__mips__) || defined(__arm__) 787 int 788 linux_sys_chown(l, v, retval) 789 struct lwp *l; 790 void *v; 791 register_t *retval; 792 { 793 struct linux_sys_chown_args /* { 794 syscallarg(char *) path; 795 syscallarg(int) uid; 796 syscallarg(int) gid; 797 } */ *uap = v; 798 struct proc *p = l->l_proc; 799 caddr_t sg = stackgap_init(p->p_emul); 800 801 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 802 803 return sys___posix_chown(l, uap, retval); 804 } 805 806 int 807 linux_sys_lchown(l, v, retval) 808 struct lwp *l; 809 void *v; 810 register_t *retval; 811 { 812 struct linux_sys_lchown_args /* { 813 syscallarg(char *) path; 814 syscallarg(int) uid; 815 syscallarg(int) gid; 816 } */ *uap = v; 817 struct proc *p = l->l_proc; 818 caddr_t sg = stackgap_init(p->p_emul); 819 820 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 821 822 return sys___posix_lchown(l, uap, retval); 823 } 824 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 825 826 int 827 linux_sys_rename(l, v, retval) 828 struct lwp *l; 829 void *v; 830 register_t *retval; 831 { 832 struct linux_sys_rename_args /* { 833 syscallarg(const char *) from; 834 syscallarg(const char *) to; 835 } */ *uap = v; 836 struct proc *p = l->l_proc; 837 caddr_t sg = stackgap_init(p->p_emul); 838 839 CHECK_ALT_EXIST(p, &sg, SCARG(uap, from)); 840 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 841 842 return sys___posix_rename(l, uap, retval); 843 } 844 845 int 846 linux_sys_mkdir(l, v, retval) 847 struct lwp *l; 848 void *v; 849 register_t *retval; 850 { 851 struct linux_sys_mkdir_args /* { 852 syscallarg(const char *) path; 853 syscallarg(int) mode; 854 } */ *uap = v; 855 struct proc *p = l->l_proc; 856 caddr_t sg = stackgap_init(p->p_emul); 857 858 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 859 860 return sys_mkdir(l, uap, retval); 861 } 862 863 int 864 linux_sys_rmdir(l, v, retval) 865 struct lwp *l; 866 void *v; 867 register_t *retval; 868 { 869 struct linux_sys_rmdir_args /* { 870 syscallarg(const char *) path; 871 } */ *uap = v; 872 struct proc *p = l->l_proc; 873 caddr_t sg = stackgap_init(p->p_emul); 874 875 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 876 877 return sys_rmdir(l, uap, retval); 878 } 879 880 int 881 linux_sys_symlink(l, v, retval) 882 struct lwp *l; 883 void *v; 884 register_t *retval; 885 { 886 struct linux_sys_symlink_args /* { 887 syscallarg(const char *) path; 888 syscallarg(const char *) to; 889 } */ *uap = v; 890 struct proc *p = l->l_proc; 891 caddr_t sg = stackgap_init(p->p_emul); 892 893 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 894 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 895 896 return sys_symlink(l, uap, retval); 897 } 898 899 int 900 linux_sys_link(l, v, retval) 901 struct lwp *l; 902 void *v; 903 register_t *retval; 904 { 905 struct linux_sys_link_args /* { 906 syscallarg(const char *) path; 907 syscallarg(const char *) link; 908 } */ *uap = v; 909 struct proc *p = l->l_proc; 910 caddr_t sg = stackgap_init(p->p_emul); 911 912 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 913 CHECK_ALT_CREAT(p, &sg, SCARG(uap, link)); 914 915 return sys_link(l, uap, retval); 916 } 917 918 int 919 linux_sys_readlink(l, v, retval) 920 struct lwp *l; 921 void *v; 922 register_t *retval; 923 { 924 struct linux_sys_readlink_args /* { 925 syscallarg(const char *) name; 926 syscallarg(char *) buf; 927 syscallarg(int) count; 928 } */ *uap = v; 929 struct proc *p = l->l_proc; 930 caddr_t sg = stackgap_init(p->p_emul); 931 932 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, name)); 933 934 return sys_readlink(l, uap, retval); 935 } 936 937 int 938 linux_sys_truncate(l, v, retval) 939 struct lwp *l; 940 void *v; 941 register_t *retval; 942 { 943 struct linux_sys_truncate_args /* { 944 syscallarg(const char *) path; 945 syscallarg(long) length; 946 } */ *uap = v; 947 struct proc *p = l->l_proc; 948 caddr_t sg = stackgap_init(p->p_emul); 949 950 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 951 952 return compat_43_sys_truncate(l, uap, retval); 953 } 954 955 /* 956 * This is just fsync() for now (just as it is in the Linux kernel) 957 * Note: this is not implemented under Linux on Alpha and Arm 958 * but should still be defined in our syscalls.master. 959 * (syscall #148 on the arm) 960 */ 961 int 962 linux_sys_fdatasync(l, v, retval) 963 struct lwp *l; 964 void *v; 965 register_t *retval; 966 { 967 #ifdef notdef 968 struct linux_sys_fdatasync_args /* { 969 syscallarg(int) fd; 970 } */ *uap = v; 971 #endif 972 return sys_fsync(l, v, retval); 973 } 974 975 /* 976 * pread(2). 977 */ 978 int 979 linux_sys_pread(l, v, retval) 980 struct lwp *l; 981 void *v; 982 register_t *retval; 983 { 984 struct linux_sys_pread_args /* { 985 syscallarg(int) fd; 986 syscallarg(void *) buf; 987 syscallarg(size_t) nbyte; 988 syscallarg(linux_off_t) offset; 989 } */ *uap = v; 990 struct sys_pread_args pra; 991 992 SCARG(&pra, fd) = SCARG(uap, fd); 993 SCARG(&pra, buf) = SCARG(uap, buf); 994 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 995 SCARG(&pra, offset) = SCARG(uap, offset); 996 997 return sys_read(l, &pra, retval); 998 } 999 1000 /* 1001 * pwrite(2). 1002 */ 1003 int 1004 linux_sys_pwrite(l, v, retval) 1005 struct lwp *l; 1006 void *v; 1007 register_t *retval; 1008 { 1009 struct linux_sys_pwrite_args /* { 1010 syscallarg(int) fd; 1011 syscallarg(void *) buf; 1012 syscallarg(size_t) nbyte; 1013 syscallarg(linux_off_t) offset; 1014 } */ *uap = v; 1015 struct sys_pwrite_args pra; 1016 1017 SCARG(&pra, fd) = SCARG(uap, fd); 1018 SCARG(&pra, buf) = SCARG(uap, buf); 1019 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 1020 SCARG(&pra, offset) = SCARG(uap, offset); 1021 1022 return sys_write(l, &pra, retval); 1023 } 1024
Indexes created Thu Sep 25 16:09:42 GMT 2025