b8fbaf8c4b
avoid having to allocate space in the 'stackgap' - which is very LWP unfriendly. The additional code for non-emulation namei() is trivial, the reduction for the emulations is massive. The vnode for a processes emulation root is saved in the cwdi structure during process exec. If the emulation root the TRYEMULROOT flag are set, namei() will do an initial search for absolute pathnames in the emulation root, if that fails it will retry from the normal root. ".." at the emulation root will always go to the real root, even in the middle of paths and when expanding symlinks. Absolute symlinks found using absolute paths in the emulation root will be relative to the emulation root (so /usr/lib/xxx.so -> /lib/xxx.so links inside the emulation root don't need changing). If the root of the emulation would be returned (for an emulation lookup), then the real root is returned instead (matching the behaviour of emul_lookup, but being a cheap comparison here) so that programs that scan "../.." looking for the root dircetory don't loop forever. The target for symbolic links is no longer mangled (it used to get the CHECK_ALT_xxx() treatment, so could get /emul/xxx prepended). CHECK_ALT_xxx() are no more. Most of the change is deleting them, and adding TRYEMULROOT to the flags to NDINIT(). A lot of the emulation system call stubs could now be deleted.
216 lines
6.5 KiB
C
216 lines
6.5 KiB
C
/* $NetBSD: irix_stat.c,v 1.19 2007/04/22 08:29:57 dsl Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Emmanuel Dreyfus.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: irix_stat.c,v 1.19 2007/04/22 08:29:57 dsl Exp $");
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#include <sys/errno.h>
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#include <sys/types.h>
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#include <sys/signal.h>
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#include <sys/param.h>
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#include <sys/filedesc.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/stdint.h>
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#include <sys/stat.h>
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#include <sys/systm.h>
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#include <sys/syscallargs.h>
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#include <sys/vfs_syscalls.h>
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#include <compat/common/compat_util.h>
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#include <compat/svr4/svr4_types.h>
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#include <compat/irix/irix_types.h>
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#include <compat/irix/irix_signal.h>
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#include <compat/irix/irix_syscall.h>
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#include <compat/irix/irix_syscallargs.h>
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static void bsd_to_irix_stat __P((struct stat *, struct irix_stat *));
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static void bsd_to_irix_stat64 __P((struct stat *, struct irix_stat64 *));
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static void
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bsd_to_irix_stat(bsp, isp)
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struct stat *bsp;
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struct irix_stat *isp;
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{
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memset(isp, 0, sizeof(*isp));
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isp->ist_dev = (irix_dev_t)bsd_to_svr4_dev_t(bsp->st_dev);
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isp->ist_ino = bsp->st_ino;
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isp->ist_mode = bsp->st_mode; /* XXX translate it */
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isp->ist_nlink = bsp->st_nlink;
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isp->ist_uid = bsp->st_uid;
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isp->ist_gid = bsp->st_gid;
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if ((bsp->st_mode & S_IFMT) == S_IFBLK ||
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(bsp->st_mode & S_IFMT) == S_IFCHR)
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isp->ist_rdev = (irix_dev_t)bsd_to_svr4_dev_t(bsp->st_rdev);
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else
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isp->ist_rdev = 0;
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isp->ist_size = bsp->st_size;
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isp->ist_atim.tv_sec = bsp->st_atimespec.tv_sec;
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isp->ist_atim.tv_nsec = bsp->st_atimespec.tv_nsec;
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isp->ist_mtim.tv_sec = bsp->st_mtimespec.tv_sec;
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isp->ist_mtim.tv_nsec = bsp->st_mtimespec.tv_nsec;
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isp->ist_ctim.tv_sec = bsp->st_ctimespec.tv_sec;
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isp->ist_ctim.tv_nsec = bsp->st_ctimespec.tv_nsec;
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isp->ist_size = bsp->st_size;
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isp->ist_blocks = bsp->st_blocks;
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isp->ist_blksize = bsp->st_blksize;
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strlcpy(isp->ist_fstype, "unknown", sizeof(isp->ist_fstype));
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return;
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}
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static void
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bsd_to_irix_stat64(bsp, isp)
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struct stat *bsp;
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struct irix_stat64 *isp;
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{
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memset(isp, 0, sizeof(*isp));
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isp->ist_dev = (irix_dev_t)bsd_to_svr4_dev_t(bsp->st_dev);
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isp->ist_ino = bsp->st_ino;
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isp->ist_mode = bsp->st_mode; /* XXX translate it */
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isp->ist_nlink = bsp->st_nlink;
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isp->ist_uid = bsp->st_uid;
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isp->ist_gid = bsp->st_gid;
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if ((bsp->st_mode & S_IFMT) == S_IFBLK ||
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(bsp->st_mode & S_IFMT) == S_IFCHR)
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isp->ist_rdev = (irix_dev_t)bsd_to_svr4_dev_t(bsp->st_rdev);
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else
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isp->ist_rdev = 0;
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isp->ist_size = bsp->st_size;
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isp->ist_atim.tv_sec = bsp->st_atimespec.tv_sec;
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isp->ist_atim.tv_nsec = bsp->st_atimespec.tv_nsec;
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isp->ist_mtim.tv_sec = bsp->st_mtimespec.tv_sec;
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isp->ist_mtim.tv_nsec = bsp->st_mtimespec.tv_nsec;
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isp->ist_ctim.tv_sec = bsp->st_ctimespec.tv_sec;
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isp->ist_ctim.tv_nsec = bsp->st_ctimespec.tv_nsec;
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isp->ist_size = bsp->st_size;
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isp->ist_blocks = bsp->st_blocks;
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isp->ist_blksize = bsp->st_blksize;
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strlcpy(isp->ist_fstype, "unknown", sizeof(isp->ist_fstype));
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return;
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}
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static int
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convert_irix_stat(struct stat *st, void *buf, int stat_version)
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{
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switch (stat_version) {
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case IRIX__STAT_VER: {
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struct irix_stat ist;
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bsd_to_irix_stat(st, &ist);
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return copyout(&ist, buf, sizeof (ist));
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}
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case IRIX__STAT64_VER: {
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struct irix_stat64 ist;
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bsd_to_irix_stat64(st, &ist);
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return copyout(&ist, buf, sizeof (ist));
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}
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case IRIX__R3_STAT_VER:
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default:
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printf("Warning: unimplemented irix_sys_?stat() version %d\n",
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stat_version);
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return EINVAL;
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}
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}
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int
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irix_sys_xstat(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct irix_sys_xstat_args /* {
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syscallarg(const int) version;
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syscallarg(const char *) path;
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syscallarg(struct stat *) buf;
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} */ *uap = v;
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struct stat st;
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int error;
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error = do_sys_stat(l, SCARG(uap, path), FOLLOW, &st);
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if (error != 0)
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return error;
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return convert_irix_stat(&st, SCARG(uap, buf), SCARG(uap, version));
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}
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int
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irix_sys_lxstat(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct irix_sys_lxstat_args /* {
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syscallarg(const int) version;
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syscallarg(const char *) path;
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syscallarg(struct stat *) buf;
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} */ *uap = v;
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struct stat st;
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int error;
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error = do_sys_stat(l, SCARG(uap, path), NOFOLLOW, &st);
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if (error != 0)
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return error;
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return convert_irix_stat(&st, SCARG(uap, buf), SCARG(uap, version));
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}
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int
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irix_sys_fxstat(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct irix_sys_fxstat_args /* {
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syscallarg(const int) version;
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syscallarg(const int) fd;
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syscallarg(struct stat *) buf;
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} */ *uap = v;
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struct stat st;
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int error;
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error = do_sys_fstat(l, SCARG(uap, fd), &st);
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if (error != 0)
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return error;
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return convert_irix_stat(&st, SCARG(uap, buf), SCARG(uap, version));
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}
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