linux_file.c revision 1.37.2.11
1 /* $NetBSD: linux_file.c,v 1.37.2.11 2002/06/20 03:43:04 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 1.37.2.11 2002/06/20 03:43:04 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/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 && fp->f_type == DTYPE_VNODE) 218 (fp->f_ops->fo_ioctl) (fp, TIOCSCTTY, (caddr_t) 0, p); 219 } 220 return 0; 221 } 222 223 /* 224 * The next two functions take care of converting the flock 225 * structure back and forth between Linux and NetBSD format. 226 * The only difference in the structures is the order of 227 * the fields, and the 'whence' value. 228 */ 229 static void 230 bsd_to_linux_flock(bfp, lfp) 231 struct flock *bfp; 232 struct linux_flock *lfp; 233 { 234 235 lfp->l_start = bfp->l_start; 236 lfp->l_len = bfp->l_len; 237 lfp->l_pid = bfp->l_pid; 238 lfp->l_whence = bfp->l_whence; 239 switch (bfp->l_type) { 240 case F_RDLCK: 241 lfp->l_type = LINUX_F_RDLCK; 242 break; 243 case F_UNLCK: 244 lfp->l_type = LINUX_F_UNLCK; 245 break; 246 case F_WRLCK: 247 lfp->l_type = LINUX_F_WRLCK; 248 break; 249 } 250 } 251 252 static void 253 linux_to_bsd_flock(lfp, bfp) 254 struct linux_flock *lfp; 255 struct flock *bfp; 256 { 257 258 bfp->l_start = lfp->l_start; 259 bfp->l_len = lfp->l_len; 260 bfp->l_pid = lfp->l_pid; 261 bfp->l_whence = lfp->l_whence; 262 switch (lfp->l_type) { 263 case LINUX_F_RDLCK: 264 bfp->l_type = F_RDLCK; 265 break; 266 case LINUX_F_UNLCK: 267 bfp->l_type = F_UNLCK; 268 break; 269 case LINUX_F_WRLCK: 270 bfp->l_type = F_WRLCK; 271 break; 272 } 273 } 274 275 /* 276 * Most actions in the fcntl() call are straightforward; simply 277 * pass control to the NetBSD system call. A few commands need 278 * conversions after the actual system call has done its work, 279 * because the flag values and lock structure are different. 280 */ 281 int 282 linux_sys_fcntl(l, v, retval) 283 struct lwp *l; 284 void *v; 285 register_t *retval; 286 { 287 struct linux_sys_fcntl_args /* { 288 syscallarg(int) fd; 289 syscallarg(int) cmd; 290 syscallarg(void *) arg; 291 } */ *uap = v; 292 struct proc *p = l->l_proc; 293 int fd, cmd, error; 294 u_long val; 295 caddr_t arg, sg; 296 struct linux_flock lfl; 297 struct flock *bfp, bfl; 298 struct sys_fcntl_args fca; 299 struct filedesc *fdp; 300 struct file *fp; 301 struct vnode *vp; 302 struct vattr va; 303 long pgid; 304 struct pgrp *pgrp; 305 struct tty *tp, *(*d_tty) __P((dev_t)); 306 307 fd = SCARG(uap, fd); 308 cmd = SCARG(uap, cmd); 309 arg = (caddr_t) SCARG(uap, arg); 310 311 switch (cmd) { 312 case LINUX_F_DUPFD: 313 cmd = F_DUPFD; 314 break; 315 case LINUX_F_GETFD: 316 cmd = F_GETFD; 317 break; 318 case LINUX_F_SETFD: 319 cmd = F_SETFD; 320 break; 321 case LINUX_F_GETFL: 322 SCARG(&fca, fd) = fd; 323 SCARG(&fca, cmd) = F_GETFL; 324 SCARG(&fca, arg) = arg; 325 if ((error = sys_fcntl(l, &fca, retval))) 326 return error; 327 retval[0] = bsd_to_linux_ioflags(retval[0]); 328 return 0; 329 case LINUX_F_SETFL: { 330 struct file *fp = NULL; 331 332 val = linux_to_bsd_ioflags((unsigned long)SCARG(uap, arg)); 333 /* 334 * Linux seems to have same semantics for sending SIGIO to the 335 * read side of socket, but slighly different semantics 336 * for SIGIO to the write side. Rather than sending the SIGIO 337 * every time it's possible to write (directly) more data, it 338 * only sends SIGIO if last write(2) failed due to insufficient 339 * memory to hold the data. This is compatible enough 340 * with NetBSD semantics to not do anything about the 341 * difference. 342 * 343 * Linux does NOT send SIGIO for pipes. Deal with socketpair 344 * ones and DTYPE_PIPE ones. For these, we don't set 345 * the underlying flags (we don't pass O_ASYNC flag down 346 * to sys_fcntl()), but set the FASYNC flag for file descriptor, 347 * so that F_GETFL would report the ASYNC i/o is on. 348 */ 349 if (val & O_ASYNC) { 350 if (((fp = fd_getfile(p->p_fd, fd)) == NULL)) 351 return (EBADF); 352 353 FILE_USE(fp); 354 355 if (((fp->f_type == DTYPE_SOCKET) && fp->f_data 356 && ((struct socket *)fp->f_data)->so_state & SS_ISAPIPE) 357 || (fp->f_type == DTYPE_PIPE)) 358 val &= ~O_ASYNC; 359 else { 360 /* not a pipe, do not modify anything */ 361 FILE_UNUSE(fp, p); 362 fp = NULL; 363 } 364 } 365 366 SCARG(&fca, fd) = fd; 367 SCARG(&fca, cmd) = F_SETFL; 368 SCARG(&fca, arg) = (caddr_t) val; 369 370 error = sys_fcntl(l, &fca, retval); 371 372 /* Now set the FASYNC flag for pipes */ 373 if (fp) { 374 if (!error) 375 fp->f_flag |= FASYNC; 376 FILE_UNUSE(fp, p); 377 } 378 379 return (error); 380 } 381 case LINUX_F_GETLK: 382 sg = stackgap_init(p, 0); 383 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 384 if ((error = copyin(arg, &lfl, sizeof lfl))) 385 return error; 386 linux_to_bsd_flock(&lfl, &bfl); 387 if ((error = copyout(&bfl, bfp, sizeof bfl))) 388 return error; 389 SCARG(&fca, fd) = fd; 390 SCARG(&fca, cmd) = F_GETLK; 391 SCARG(&fca, arg) = bfp; 392 if ((error = sys_fcntl(l, &fca, retval))) 393 return error; 394 if ((error = copyin(bfp, &bfl, sizeof bfl))) 395 return error; 396 bsd_to_linux_flock(&bfl, &lfl); 397 return copyout(&lfl, arg, sizeof lfl); 398 399 case LINUX_F_SETLK: 400 case LINUX_F_SETLKW: 401 cmd = (cmd == LINUX_F_SETLK ? F_SETLK : F_SETLKW); 402 if ((error = copyin(arg, &lfl, sizeof lfl))) 403 return error; 404 linux_to_bsd_flock(&lfl, &bfl); 405 sg = stackgap_init(p, 0); 406 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 407 if ((error = copyout(&bfl, bfp, sizeof bfl))) 408 return error; 409 arg = (caddr_t)bfp; 410 break; 411 412 case LINUX_F_SETOWN: 413 case LINUX_F_GETOWN: 414 /* 415 * We need to route fcntl() for tty descriptors around normal 416 * fcntl(), since NetBSD tty TIOC{G,S}PGRP semantics is too 417 * restrictive for Linux F_{G,S}ETOWN. For non-tty descriptors, 418 * this is not a problem. 419 */ 420 fdp = p->p_fd; 421 if ((fp = fd_getfile(fdp, fd)) == NULL) 422 return EBADF; 423 /* FILE_USE() not needed here */ 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(l, &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(l, v, retval) 509 struct lwp *l; 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 proc *p = l->l_proc; 518 struct sys___fstat13_args fsa; 519 struct linux_stat tmplst; 520 struct stat *st,tmpst; 521 caddr_t sg; 522 int error; 523 524 sg = stackgap_init(p, 0); 525 526 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 527 528 SCARG(&fsa, fd) = SCARG(uap, fd); 529 SCARG(&fsa, sb) = st; 530 531 if ((error = sys___fstat13(l, &fsa, retval))) 532 return error; 533 534 if ((error = copyin(st, &tmpst, sizeof tmpst))) 535 return error; 536 537 bsd_to_linux_stat(&tmpst, &tmplst); 538 539 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 540 return error; 541 542 return 0; 543 } 544 545 static int 546 linux_stat1(l, v, retval, dolstat) 547 struct lwp *l; 548 void *v; 549 register_t *retval; 550 int dolstat; 551 { 552 struct sys___stat13_args sa; 553 struct linux_stat tmplst; 554 struct stat *st, tmpst; 555 struct proc *p = l->l_proc; 556 caddr_t sg; 557 int error; 558 struct linux_sys_stat_args *uap = v; 559 560 sg = stackgap_init(p, 0); 561 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 562 if (dolstat) 563 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 564 else 565 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 566 567 SCARG(&sa, ub) = st; 568 SCARG(&sa, path) = SCARG(uap, path); 569 570 if ((error = (dolstat ? sys___lstat13(l, &sa, retval) : 571 sys___stat13(l, &sa, retval)))) 572 return error; 573 574 if ((error = copyin(st, &tmpst, sizeof tmpst))) 575 return error; 576 577 bsd_to_linux_stat(&tmpst, &tmplst); 578 579 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 580 return error; 581 582 return 0; 583 } 584 585 int 586 linux_sys_stat(l, v, retval) 587 struct lwp *l; 588 void *v; 589 register_t *retval; 590 { 591 struct linux_sys_stat_args /* { 592 syscallarg(const char *) path; 593 syscallarg(struct linux_stat *) sp; 594 } */ *uap = v; 595 596 return linux_stat1(l, uap, retval, 0); 597 } 598 599 /* Note: this is "newlstat" in the Linux sources */ 600 /* (we don't bother with the old lstat currently) */ 601 int 602 linux_sys_lstat(l, v, retval) 603 struct lwp *l; 604 void *v; 605 register_t *retval; 606 { 607 struct linux_sys_lstat_args /* { 608 syscallarg(const char *) path; 609 syscallarg(struct linux_stat *) sp; 610 } */ *uap = v; 611 612 return linux_stat1(l, uap, retval, 1); 613 } 614 615 /* 616 * The following syscalls are mostly here because of the alternate path check. 617 */ 618 int 619 linux_sys_access(l, v, retval) 620 struct lwp *l; 621 void *v; 622 register_t *retval; 623 { 624 struct linux_sys_access_args /* { 625 syscallarg(const char *) path; 626 syscallarg(int) flags; 627 } */ *uap = v; 628 struct proc *p = l->l_proc; 629 caddr_t sg = stackgap_init(p, 0); 630 631 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 632 633 return sys_access(l, uap, retval); 634 } 635 636 int 637 linux_sys_unlink(l, v, retval) 638 struct lwp *l; 639 void *v; 640 register_t *retval; 641 642 { 643 struct linux_sys_unlink_args /* { 644 syscallarg(const char *) path; 645 } */ *uap = v; 646 struct proc *p = l->l_proc; 647 caddr_t sg = stackgap_init(p, 0); 648 649 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 650 651 return sys_unlink(l, uap, retval); 652 } 653 654 int 655 linux_sys_chdir(l, v, retval) 656 struct lwp *l; 657 void *v; 658 register_t *retval; 659 { 660 struct linux_sys_chdir_args /* { 661 syscallarg(const char *) path; 662 } */ *uap = v; 663 struct proc *p = l->l_proc; 664 caddr_t sg = stackgap_init(p, 0); 665 666 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 667 668 return sys_chdir(l, uap, retval); 669 } 670 671 int 672 linux_sys_mknod(l, v, retval) 673 struct lwp *l; 674 void *v; 675 register_t *retval; 676 { 677 struct linux_sys_mknod_args /* { 678 syscallarg(const char *) path; 679 syscallarg(int) mode; 680 syscallarg(int) dev; 681 } */ *uap = v; 682 struct proc *p = l->l_proc; 683 caddr_t sg = stackgap_init(p, 0); 684 struct sys_mkfifo_args bma; 685 686 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 687 688 /* 689 * BSD handles FIFOs separately 690 */ 691 if (SCARG(uap, mode) & S_IFIFO) { 692 SCARG(&bma, path) = SCARG(uap, path); 693 SCARG(&bma, mode) = SCARG(uap, mode); 694 return sys_mkfifo(l, uap, retval); 695 } else 696 return sys_mknod(l, uap, retval); 697 } 698 699 int 700 linux_sys_chmod(l, v, retval) 701 struct lwp *l; 702 void *v; 703 register_t *retval; 704 { 705 struct linux_sys_chmod_args /* { 706 syscallarg(const char *) path; 707 syscallarg(int) mode; 708 } */ *uap = v; 709 struct proc *p = l->l_proc; 710 caddr_t sg = stackgap_init(p, 0); 711 712 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 713 714 return sys_chmod(l, uap, retval); 715 } 716 717 #if defined(__i386__) || defined(__m68k__) || defined(__arm__) 718 int 719 linux_sys_chown16(l, v, retval) 720 struct lwp *l; 721 void *v; 722 register_t *retval; 723 { 724 struct linux_sys_chown16_args /* { 725 syscallarg(const char *) path; 726 syscallarg(int) uid; 727 syscallarg(int) gid; 728 } */ *uap = v; 729 struct proc *p = l->l_proc; 730 struct sys___posix_chown_args bca; 731 caddr_t sg = stackgap_init(p, 0); 732 733 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 734 735 SCARG(&bca, path) = SCARG(uap, path); 736 SCARG(&bca, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 737 (uid_t)-1 : SCARG(uap, uid); 738 SCARG(&bca, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 739 (gid_t)-1 : SCARG(uap, gid); 740 741 return sys___posix_chown(l, &bca, retval); 742 } 743 744 int 745 linux_sys_fchown16(l, v, retval) 746 struct lwp *l; 747 void *v; 748 register_t *retval; 749 { 750 struct linux_sys_fchown16_args /* { 751 syscallarg(int) fd; 752 syscallarg(int) uid; 753 syscallarg(int) gid; 754 } */ *uap = v; 755 struct sys___posix_fchown_args bfa; 756 757 SCARG(&bfa, fd) = SCARG(uap, fd); 758 SCARG(&bfa, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 759 (uid_t)-1 : SCARG(uap, uid); 760 SCARG(&bfa, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 761 (gid_t)-1 : SCARG(uap, gid); 762 763 return sys___posix_fchown(l, &bfa, retval); 764 } 765 766 int 767 linux_sys_lchown16(l, v, retval) 768 struct lwp *l; 769 void *v; 770 register_t *retval; 771 { 772 struct linux_sys_lchown16_args /* { 773 syscallarg(char *) path; 774 syscallarg(int) uid; 775 syscallarg(int) gid; 776 } */ *uap = v; 777 struct proc *p = l->l_proc; 778 struct sys___posix_lchown_args bla; 779 caddr_t sg = stackgap_init(p, 0); 780 781 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 782 783 SCARG(&bla, path) = SCARG(uap, path); 784 SCARG(&bla, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 785 (uid_t)-1 : SCARG(uap, uid); 786 SCARG(&bla, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 787 (gid_t)-1 : SCARG(uap, gid); 788 789 return sys___posix_lchown(l, &bla, retval); 790 } 791 #endif /* __i386__ || __m68k__ || __arm__ */ 792 #if defined (__i386__) || defined (__m68k__) || \ 793 defined (__powerpc__) || defined (__mips__) || defined(__arm__) 794 int 795 linux_sys_chown(l, v, retval) 796 struct lwp *l; 797 void *v; 798 register_t *retval; 799 { 800 struct linux_sys_chown_args /* { 801 syscallarg(char *) path; 802 syscallarg(int) uid; 803 syscallarg(int) gid; 804 } */ *uap = v; 805 struct proc *p = l->l_proc; 806 caddr_t sg = stackgap_init(p, 0); 807 808 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 809 810 return sys___posix_chown(l, uap, retval); 811 } 812 813 int 814 linux_sys_lchown(l, v, retval) 815 struct lwp *l; 816 void *v; 817 register_t *retval; 818 { 819 struct linux_sys_lchown_args /* { 820 syscallarg(char *) path; 821 syscallarg(int) uid; 822 syscallarg(int) gid; 823 } */ *uap = v; 824 struct proc *p = l->l_proc; 825 caddr_t sg = stackgap_init(p, 0); 826 827 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, path)); 828 829 return sys___posix_lchown(l, uap, retval); 830 } 831 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 832 833 int 834 linux_sys_rename(l, v, retval) 835 struct lwp *l; 836 void *v; 837 register_t *retval; 838 { 839 struct linux_sys_rename_args /* { 840 syscallarg(const char *) from; 841 syscallarg(const char *) to; 842 } */ *uap = v; 843 struct proc *p = l->l_proc; 844 caddr_t sg = stackgap_init(p, 0); 845 846 CHECK_ALT_EXIST(p, &sg, SCARG(uap, from)); 847 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 848 849 return sys___posix_rename(l, uap, retval); 850 } 851 852 int 853 linux_sys_mkdir(l, v, retval) 854 struct lwp *l; 855 void *v; 856 register_t *retval; 857 { 858 struct linux_sys_mkdir_args /* { 859 syscallarg(const char *) path; 860 syscallarg(int) mode; 861 } */ *uap = v; 862 struct proc *p = l->l_proc; 863 caddr_t sg = stackgap_init(p, 0); 864 865 CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); 866 867 return sys_mkdir(l, uap, retval); 868 } 869 870 int 871 linux_sys_rmdir(l, v, retval) 872 struct lwp *l; 873 void *v; 874 register_t *retval; 875 { 876 struct linux_sys_rmdir_args /* { 877 syscallarg(const char *) path; 878 } */ *uap = v; 879 struct proc *p = l->l_proc; 880 caddr_t sg = stackgap_init(p, 0); 881 882 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 883 884 return sys_rmdir(l, uap, retval); 885 } 886 887 int 888 linux_sys_symlink(l, v, retval) 889 struct lwp *l; 890 void *v; 891 register_t *retval; 892 { 893 struct linux_sys_symlink_args /* { 894 syscallarg(const char *) path; 895 syscallarg(const char *) to; 896 } */ *uap = v; 897 struct proc *p = l->l_proc; 898 caddr_t sg = stackgap_init(p, 0); 899 900 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 901 CHECK_ALT_CREAT(p, &sg, SCARG(uap, to)); 902 903 return sys_symlink(l, uap, retval); 904 } 905 906 int 907 linux_sys_link(l, v, retval) 908 struct lwp *l; 909 void *v; 910 register_t *retval; 911 { 912 struct linux_sys_link_args /* { 913 syscallarg(const char *) path; 914 syscallarg(const char *) link; 915 } */ *uap = v; 916 struct proc *p = l->l_proc; 917 caddr_t sg = stackgap_init(p, 0); 918 919 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 920 CHECK_ALT_CREAT(p, &sg, SCARG(uap, link)); 921 922 return sys_link(l, uap, retval); 923 } 924 925 int 926 linux_sys_readlink(l, v, retval) 927 struct lwp *l; 928 void *v; 929 register_t *retval; 930 { 931 struct linux_sys_readlink_args /* { 932 syscallarg(const char *) name; 933 syscallarg(char *) buf; 934 syscallarg(int) count; 935 } */ *uap = v; 936 struct proc *p = l->l_proc; 937 caddr_t sg = stackgap_init(p, 0); 938 939 CHECK_ALT_SYMLINK(p, &sg, SCARG(uap, name)); 940 941 return sys_readlink(l, uap, retval); 942 } 943 944 int 945 linux_sys_truncate(l, v, retval) 946 struct lwp *l; 947 void *v; 948 register_t *retval; 949 { 950 struct linux_sys_truncate_args /* { 951 syscallarg(const char *) path; 952 syscallarg(long) length; 953 } */ *uap = v; 954 struct proc *p = l->l_proc; 955 caddr_t sg = stackgap_init(p, 0); 956 957 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 958 959 return compat_43_sys_truncate(l, uap, retval); 960 } 961 962 /* 963 * This is just fsync() for now (just as it is in the Linux kernel) 964 * Note: this is not implemented under Linux on Alpha and Arm 965 * but should still be defined in our syscalls.master. 966 * (syscall #148 on the arm) 967 */ 968 int 969 linux_sys_fdatasync(l, v, retval) 970 struct lwp *l; 971 void *v; 972 register_t *retval; 973 { 974 #ifdef notdef 975 struct linux_sys_fdatasync_args /* { 976 syscallarg(int) fd; 977 } */ *uap = v; 978 #endif 979 return sys_fsync(l, v, retval); 980 } 981 982 /* 983 * pread(2). 984 */ 985 int 986 linux_sys_pread(l, v, retval) 987 struct lwp *l; 988 void *v; 989 register_t *retval; 990 { 991 struct linux_sys_pread_args /* { 992 syscallarg(int) fd; 993 syscallarg(void *) buf; 994 syscallarg(size_t) nbyte; 995 syscallarg(linux_off_t) offset; 996 } */ *uap = v; 997 struct sys_pread_args pra; 998 999 SCARG(&pra, fd) = SCARG(uap, fd); 1000 SCARG(&pra, buf) = SCARG(uap, buf); 1001 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 1002 SCARG(&pra, offset) = SCARG(uap, offset); 1003 1004 return sys_read(l, &pra, retval); 1005 } 1006 1007 /* 1008 * pwrite(2). 1009 */ 1010 int 1011 linux_sys_pwrite(l, v, retval) 1012 struct lwp *l; 1013 void *v; 1014 register_t *retval; 1015 { 1016 struct linux_sys_pwrite_args /* { 1017 syscallarg(int) fd; 1018 syscallarg(void *) buf; 1019 syscallarg(size_t) nbyte; 1020 syscallarg(linux_off_t) offset; 1021 } */ *uap = v; 1022 struct sys_pwrite_args pra; 1023 1024 SCARG(&pra, fd) = SCARG(uap, fd); 1025 SCARG(&pra, buf) = SCARG(uap, buf); 1026 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 1027 SCARG(&pra, offset) = SCARG(uap, offset); 1028 1029 return sys_write(l, &pra, retval); 1030 } 1031
Indexes created Fri Sep 26 20:09:58 GMT 2025