initial import of NetBSD tree

1 files changed, 795 insertions, 0 deletions

diff --git a/sys/compat/linux/linux_file.c b/sys/compat/linux/linux_file.c
new file mode 100644
index 00000000000..c05a89916f2
--- /dev/null
+++ b/sys/compat/linux/linux_file.c
@@ -0,0 +1,795 @@
+/*	$NetBSD: linux_file.c,v 1.13 1995/10/08 22:53:43 fvdl Exp $	*/
+
+/*
+ * Copyright (c) 1995 Frank van der Linden
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed for the NetBSD Project
+ *      by Frank van der Linden
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/namei.h>
+#include <sys/proc.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/filedesc.h>
+#include <sys/ioctl.h>
+#include <sys/kernel.h>
+#include <sys/mount.h>
+#include <sys/malloc.h>
+#include <sys/vnode.h>
+#include <sys/tty.h>
+#include <sys/conf.h>
+
+#include <sys/syscallargs.h>
+
+#include <compat/linux/linux_types.h>
+#include <compat/linux/linux_signal.h>
+#include <compat/linux/linux_syscallargs.h>
+#include <compat/linux/linux_fcntl.h>
+#include <compat/linux/linux_util.h>
+
+/*
+ * Some file-related calls are handled here. The usual flag conversion
+ * an structure conversion is done, and alternate emul path searching.
+ */
+
+/*
+ * The next two functions convert between the Linux and NetBSD values
+ * of the flags used in open(2) and fcntl(2).
+ */
+static int
+linux_to_bsd_ioflags(int lflags)
+{
+	int res = 0;
+
+	res |= cvtto_bsd_mask(lflags, LINUX_O_WRONLY, O_WRONLY);
+	res |= cvtto_bsd_mask(lflags, LINUX_O_RDONLY, O_RDONLY);
+	res |= cvtto_bsd_mask(lflags, LINUX_O_RDWR, O_RDWR);
+	res |= cvtto_bsd_mask(lflags, LINUX_O_CREAT, O_CREAT);
+	res |= cvtto_bsd_mask(lflags, LINUX_O_EXCL, O_EXCL);
+	res |= cvtto_bsd_mask(lflags, LINUX_O_NOCTTY, O_NOCTTY);
+	res |= cvtto_bsd_mask(lflags, LINUX_O_TRUNC, O_TRUNC);
+	res |= cvtto_bsd_mask(lflags, LINUX_O_NDELAY, O_NDELAY);
+	res |= cvtto_bsd_mask(lflags, LINUX_O_SYNC, O_FSYNC);
+	res |= cvtto_bsd_mask(lflags, LINUX_FASYNC, O_ASYNC);
+	res |= cvtto_bsd_mask(lflags, LINUX_O_APPEND, O_APPEND);
+
+	return res;
+}
+
+static int
+bsd_to_linux_ioflags(int bflags)
+{
+	int res = 0;
+
+	res |= cvtto_linux_mask(bflags, O_WRONLY, LINUX_O_WRONLY);
+	res |= cvtto_linux_mask(bflags, O_RDONLY, LINUX_O_RDONLY);
+	res |= cvtto_linux_mask(bflags, O_RDWR, LINUX_O_RDWR);
+	res |= cvtto_linux_mask(bflags, O_CREAT, LINUX_O_CREAT);
+	res |= cvtto_linux_mask(bflags, O_EXCL, LINUX_O_EXCL);
+	res |= cvtto_linux_mask(bflags, O_NOCTTY, LINUX_O_NOCTTY);
+	res |= cvtto_linux_mask(bflags, O_TRUNC, LINUX_O_TRUNC);
+	res |= cvtto_linux_mask(bflags, O_NDELAY, LINUX_O_NDELAY);
+	res |= cvtto_linux_mask(bflags, O_FSYNC, LINUX_O_SYNC);
+	res |= cvtto_linux_mask(bflags, O_ASYNC, LINUX_FASYNC);
+	res |= cvtto_linux_mask(bflags, O_APPEND, LINUX_O_APPEND);
+
+	return res;
+}
+
+/*
+ * creat(2) is an obsolete function, but it's present as a Linux
+ * system call, so let's deal with it.
+ *
+ * Just call open(2) with the TRUNC, CREAT and WRONLY flags.
+ */
+int
+linux_sys_creat(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_creat_args /* {
+		syscallarg(char *) path;
+		syscallarg(int) mode;
+	} */ *uap = v;
+	struct sys_open_args oa;
+	caddr_t sg;
+
+	sg = stackgap_init(p->p_emul);
+	LINUX_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
+
+	SCARG(&oa, path) = SCARG(uap, path);
+	SCARG(&oa, flags) = O_CREAT | O_TRUNC | O_WRONLY;
+	SCARG(&oa, mode) = SCARG(uap, mode);
+
+	return sys_open(p, &oa, retval);
+}
+
+/*
+ * open(2). Take care of the different flag values, and let the
+ * NetBSD syscall do the real work. See if this operation
+ * gives the current process a controlling terminal.
+ * (XXX is this necessary?)
+ */
+int
+linux_sys_open(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_open_args /* {
+		syscallarg(char *) path;
+		syscallarg(int) flags;
+		syscallarg(int) mode;
+	} */ *uap = v;
+	int error, fl;
+	struct sys_open_args boa;
+	caddr_t sg;
+
+	sg = stackgap_init(p->p_emul);
+
+	fl = linux_to_bsd_ioflags(SCARG(uap, flags));
+
+	if (fl & O_CREAT)
+		LINUX_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
+	else
+		LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
+
+	SCARG(&boa, path) = SCARG(uap, path);
+	SCARG(&boa, flags) = fl;
+	SCARG(&boa, mode) = SCARG(uap, mode);
+
+	if ((error = sys_open(p, &boa, retval)))
+		return error;
+
+	/*
+	 * this bit from sunos_misc.c (and svr4_fcntl.c).
+	 * If we are a session leader, and we don't have a controlling
+	 * terminal yet, and the O_NOCTTY flag is not set, try to make
+	 * this the controlling terminal.
+	 */ 
+        if (!(fl & O_NOCTTY) && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
+                struct filedesc *fdp = p->p_fd;
+                struct file     *fp = fdp->fd_ofiles[*retval];
+
+                /* ignore any error, just give it a try */
+                if (fp->f_type == DTYPE_VNODE)
+                        (fp->f_ops->fo_ioctl) (fp, TIOCSCTTY, (caddr_t) 0, p);
+        }
+	return 0;
+}
+
+/*
+ * This appears to be part of a Linux attempt to switch to 64 bits file sizes.
+ */
+int
+linux_sys_llseek(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_llseek_args /* {
+		syscallarg(int) fd;
+		syscallarg(uint32_t) ohigh;
+		syscallarg(uint32_t) olow;
+		syscallarg(caddr_t) res;
+		syscallarg(int) whence;
+	} */ *uap = v;
+	struct sys_lseek_args bla;
+	int error;
+	off_t off;
+
+	off = SCARG(uap, olow) | (((off_t) SCARG(uap, ohigh)) << 32);
+
+	SCARG(&bla, fd) = SCARG(uap, fd);
+	SCARG(&bla, offset) = off;
+	SCARG(&bla, whence) = SCARG(uap, whence);
+
+	if ((error = sys_lseek(p, &bla, retval)))
+		return error;
+
+	if ((error = copyout(retval, SCARG(uap, res), sizeof (off_t))))
+		return error;
+
+	retval[0] = 0;
+	return 0;
+}
+
+/*
+ * The next two functions take care of converting the flock
+ * structure back and forth between Linux and NetBSD format.
+ * The only difference in the structures is the order of
+ * the fields, and the 'whence' value.
+ */
+static void
+bsd_to_linux_flock(bfp, lfp)
+	struct flock *bfp;
+	struct linux_flock *lfp;
+{
+
+	lfp->l_start = bfp->l_start;
+	lfp->l_len = bfp->l_len;
+	lfp->l_pid = bfp->l_pid;
+	lfp->l_whence = bfp->l_whence;
+	switch (bfp->l_type) {
+	case F_RDLCK:
+		lfp->l_type = LINUX_F_RDLCK;
+		break;
+	case F_UNLCK:
+		lfp->l_type = LINUX_F_UNLCK;
+		break;
+	case F_WRLCK:
+		lfp->l_type = LINUX_F_WRLCK;
+		break;
+	}
+}
+
+static void
+linux_to_bsd_flock(lfp, bfp)
+	struct linux_flock *lfp;
+	struct flock *bfp;
+{
+
+	bfp->l_start = lfp->l_start;
+	bfp->l_len = lfp->l_len;
+	bfp->l_pid = lfp->l_pid;
+	bfp->l_whence = lfp->l_whence;
+	switch (lfp->l_type) {
+	case LINUX_F_RDLCK:
+		bfp->l_type = F_RDLCK;
+		break;
+	case LINUX_F_UNLCK:
+		bfp->l_type = F_UNLCK;
+		break;
+	case LINUX_F_WRLCK:
+		bfp->l_type = F_WRLCK;
+		break;
+	}
+}
+
+/*
+ * Most actions in the fcntl() call are straightforward; simply
+ * pass control to the NetBSD system call. A few commands need
+ * conversions after the actual system call has done its work,
+ * because the flag values and lock structure are different.
+ */
+int
+linux_sys_fcntl(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_fcntl_args /* {
+		syscallarg(int) fd;
+		syscallarg(int) cmd;
+		syscallarg(void *) arg;
+	} */ *uap = v;
+	int fd, cmd, error, val;
+	caddr_t arg, sg;
+	struct linux_flock lfl;
+	struct flock *bfp, bfl;
+	struct sys_fcntl_args fca;
+	struct filedesc *fdp;
+	struct file *fp;
+	struct vnode *vp;
+	struct vattr va;
+	long pgid;
+	struct pgrp *pgrp;
+	struct tty *tp, *(*d_tty) __P((dev_t));
+
+	fd = SCARG(uap, fd);
+	cmd = SCARG(uap, cmd);
+	arg = (caddr_t) SCARG(uap, arg);
+
+	switch (cmd) {
+	case LINUX_F_DUPFD:
+		cmd = F_DUPFD;
+		break;
+	case LINUX_F_GETFD:
+		cmd = F_GETFD;
+		break;
+	case LINUX_F_SETFD:
+		cmd = F_SETFD;
+		break;
+	case LINUX_F_GETFL:
+		SCARG(&fca, fd) = fd;
+		SCARG(&fca, cmd) = F_GETFL;
+		SCARG(&fca, arg) = arg;
+		if ((error = sys_fcntl(p, &fca, retval)))
+			return error;
+		retval[0] = bsd_to_linux_ioflags(retval[0]);
+		return 0;
+	case LINUX_F_SETFL:
+		val = linux_to_bsd_ioflags((int)SCARG(uap, arg));
+		SCARG(&fca, fd) = fd;
+		SCARG(&fca, cmd) = F_SETFL;
+		SCARG(&fca, arg) = (caddr_t) val;
+		return sys_fcntl(p, &fca, retval);
+	case LINUX_F_GETLK:
+		sg = stackgap_init(p->p_emul);
+		bfp = (struct flock *) stackgap_alloc(&sg, sizeof *bfp);
+		SCARG(&fca, fd) = fd;
+		SCARG(&fca, cmd) = F_GETLK;
+		SCARG(&fca, arg) = bfp;
+		if ((error = sys_fcntl(p, &fca, retval)))
+			return error;
+		if ((error = copyin(bfp, &bfl, sizeof bfl)))
+			return error;
+		bsd_to_linux_flock(&bfl, &lfl);
+		return copyout(&lfl, arg, sizeof lfl);
+		break;
+	case LINUX_F_SETLK:
+	case LINUX_F_SETLKW:
+		cmd = (cmd == LINUX_F_SETLK ? F_SETLK : F_SETLKW);
+		if ((error = copyin(arg, &lfl, sizeof lfl)))
+			return error;
+		linux_to_bsd_flock(&lfl, &bfl);
+		sg = stackgap_init(p->p_emul);
+		bfp = (struct flock *) stackgap_alloc(&sg, sizeof *bfp);
+		if ((error = copyout(&bfl, bfp, sizeof bfl)))
+			return error;
+		SCARG(&fca, fd) = fd;
+		SCARG(&fca, cmd) = cmd;
+		SCARG(&fca, arg) = bfp;
+		return sys_fcntl(p, &fca, retval);
+		break;
+	case LINUX_F_SETOWN:
+	case LINUX_F_GETOWN:	
+		/*
+		 * We need to route around the normal fcntl() for these calls,
+		 * since it uses TIOC{G,S}PGRP, which is too restrictive for
+		 * Linux F_{G,S}ETOWN semantics. For sockets, this problem
+		 * does not exist.
+		 */
+		fdp = p->p_fd;
+		if ((u_int)fd >= fdp->fd_nfiles ||
+		    (fp = fdp->fd_ofiles[fd]) == NULL)
+			return EBADF;
+		if (fp->f_type == DTYPE_SOCKET) {
+			cmd = cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN;
+			break;
+		}
+		vp = (struct vnode *)fp->f_data;
+		if (vp->v_type != VCHR)
+			return EINVAL;
+		if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)))
+			return error;
+		d_tty = cdevsw[major(va.va_rdev)].d_tty;
+		if (!d_tty || (!(tp = (*d_tty)(va.va_rdev))))
+			return EINVAL;
+		if (cmd == LINUX_F_GETOWN) {
+			retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
+			return 0;
+		}
+		if ((long)arg <= 0) {
+			pgid = -(long)arg;
+		} else {
+			struct proc *p1 = pfind((long)arg);
+			if (p1 == 0)
+				return (ESRCH);
+			pgid = (long)p1->p_pgrp->pg_id;
+		}
+		pgrp = pgfind(pgid);
+		if (pgrp == NULL || pgrp->pg_session != p->p_session)
+			return EPERM;
+		tp->t_pgrp = pgrp;
+		return 0;
+	default:
+		return EOPNOTSUPP;
+	}
+
+	SCARG(&fca, fd) = fd;
+	SCARG(&fca, cmd) = cmd;
+	SCARG(&fca, arg) = arg;
+
+	return sys_fcntl(p, &fca, retval);
+}
+
+/*
+ * Convert a NetBSD stat structure to a Linux stat structure.
+ * Only the order of the fields and the padding in the structure
+ * is different. linux_fakedev is a machine-dependent function
+ * which optionally converts device driver major/minor numbers
+ * (XXX horrible, but what can you do against code that compares
+ * things against constant major device numbers? sigh)
+ */
+static void
+bsd_to_linux_stat(bsp, lsp)
+	struct stat *bsp;
+	struct linux_stat *lsp;
+{
+
+	lsp->lst_dev     = bsp->st_dev;
+	lsp->lst_ino     = bsp->st_ino;
+	lsp->lst_mode    = bsp->st_mode;
+	lsp->lst_nlink   = bsp->st_nlink;
+	lsp->lst_uid     = bsp->st_uid;
+	lsp->lst_gid     = bsp->st_gid;
+	lsp->lst_rdev    = linux_fakedev(bsp->st_rdev);
+	lsp->lst_size    = bsp->st_size;
+	lsp->lst_blksize = bsp->st_blksize;
+	lsp->lst_blocks  = bsp->st_blocks;
+	lsp->lst_atime   = bsp->st_atime;
+	lsp->lst_mtime   = bsp->st_mtime;
+	lsp->lst_ctime   = bsp->st_ctime;
+}
+
+/*
+ * The stat functions below are plain sailing. stat and lstat are handled
+ * by one function to avoid code duplication.
+ */
+int
+linux_sys_fstat(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_fstat_args /* {
+		syscallarg(int) fd;
+		syscallarg(linux_stat *) sp;
+	} */ *uap = v;
+	struct sys_fstat_args fsa;
+	struct linux_stat tmplst;
+	struct stat *st,tmpst;
+	caddr_t sg;
+	int error;
+
+	sg = stackgap_init(p->p_emul);
+
+	st = stackgap_alloc(&sg, sizeof (struct stat));
+
+	SCARG(&fsa, fd) = SCARG(uap, fd);
+	SCARG(&fsa, sb) = st;
+
+	if ((error = sys_fstat(p, &fsa, retval)))
+		return error;
+
+	if ((error = copyin(st, &tmpst, sizeof tmpst)))
+		return error;
+
+	bsd_to_linux_stat(&tmpst, &tmplst);
+
+	if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst)))
+		return error;
+
+	return 0;
+}
+
+static int
+linux_stat1(p, uap, retval, dolstat)
+	struct proc *p;
+	struct linux_sys_stat_args *uap;
+	register_t *retval;
+	int dolstat;
+{
+	struct sys_stat_args sa;
+	struct linux_stat tmplst;
+	struct stat *st, tmpst;
+	caddr_t sg;
+	int error;
+
+	sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
+
+	st = stackgap_alloc(&sg, sizeof (struct stat));
+	SCARG(&sa, ub) = st;
+	SCARG(&sa, path) = SCARG(uap, path);
+
+	if ((error = (dolstat ? sys_lstat(p, &sa, retval) :
+				sys_stat(p, &sa, retval))))
+		return error;
+
+	if ((error = copyin(st, &tmpst, sizeof tmpst)))
+		return error;
+
+	bsd_to_linux_stat(&tmpst, &tmplst);
+
+	if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst)))
+		return error;
+
+	return 0;
+}
+
+int
+linux_sys_stat(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_stat_args /* {
+		syscallarg(char *) path;
+		syscallarg(struct linux_stat *) sp;
+	} */ *uap = v;
+
+	return linux_stat1(p, uap, retval, 0);
+}
+
+int
+linux_sys_lstat(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_lstat_args /* {
+		syscallarg(char *) path;
+		syscallarg(struct linux_stat *) sp;
+	} */ *uap = v;
+
+	return linux_stat1(p, uap, retval, 1);
+}
+
+/*
+ * The following syscalls are mostly here because of the alternate path check.
+ */
+int
+linux_sys_access(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_access_args /* {
+		syscallarg(char *) path;
+		syscallarg(int) flags;
+	} */ *uap = v;
+	caddr_t sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
+
+	return sys_access(p, uap, retval);
+}
+
+int
+linux_sys_unlink(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+
+{
+	struct linux_sys_unlink_args /* {
+		syscallarg(char *) path;
+	} */ *uap = v;
+	caddr_t sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
+
+	return sys_unlink(p, uap, retval);
+}
+
+int
+linux_sys_chdir(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_chdir_args /* {
+		syscallarg(char *) path;
+	} */ *uap = v;
+	caddr_t sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
+
+	return sys_chdir(p, uap, retval);
+}
+
+int
+linux_sys_mknod(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_mknod_args /* {
+		syscallarg(char *) path;
+		syscallarg(int) mode;
+		syscallarg(int) dev;
+	} */ *uap = v;
+	caddr_t sg = stackgap_init(p->p_emul);
+	struct sys_mkfifo_args bma;
+
+	LINUX_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
+
+	/*
+	 * BSD handles FIFOs seperately
+	 */
+	if (SCARG(uap, mode) & S_IFIFO) {
+		SCARG(&bma, path) = SCARG(uap, path);
+		SCARG(&bma, mode) = SCARG(uap, mode);
+		return sys_mkfifo(p, uap, retval);
+	} else
+		return sys_mknod(p, uap, retval);
+}
+
+int
+linux_sys_chmod(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_chmod_args /* {
+		syscallarg(char *) path;
+		syscallarg(int) mode;
+	} */ *uap = v;
+	caddr_t sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
+
+	return sys_chmod(p, uap, retval);
+}
+
+int
+linux_sys_chown(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_chown_args /* {
+		syscallarg(char *) path;
+		syscallarg(int) uid;
+		syscallarg(int) gid;
+	} */ *uap = v;
+	struct sys_chown_args bca;
+	caddr_t sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
+
+	SCARG(&bca, path) = SCARG(uap, path);
+	SCARG(&bca, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ?
+		(uid_t)-1 : SCARG(uap, uid);
+	SCARG(&bca, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ?
+		(gid_t)-1 : SCARG(uap, gid);
+	
+	return sys_chown(p, &bca, retval);
+}
+
+int
+linux_sys_fchown(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_fchown_args /* {
+		syscallarg(int) fd;
+		syscallarg(int) uid;
+		syscallarg(int) gid;
+	} */ *uap = v;
+	struct sys_fchown_args bfa;
+
+	SCARG(&bfa, fd) = SCARG(uap, fd);
+	SCARG(&bfa, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ?
+		(uid_t)-1 : SCARG(uap, uid);
+	SCARG(&bfa, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ?
+		(gid_t)-1 : SCARG(uap, gid);
+	
+	return sys_fchown(p, &bfa, retval);
+}
+
+int
+linux_sys_rename(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_rename_args /* {
+		syscallarg(char *) from;
+		syscallarg(char *) to;
+	} */ *uap = v;
+	caddr_t sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, from));
+	LINUX_CHECK_ALT_CREAT(p, &sg, SCARG(uap, to));
+
+	return sys_rename(p, uap, retval);
+}
+
+int
+linux_sys_mkdir(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_mkdir_args /* {
+		syscallarg(char *) path;
+		syscallarg(int) mode;
+	} */ *uap = v;
+	caddr_t sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
+
+	return sys_mkdir(p, uap, retval);
+}
+
+int
+linux_sys_rmdir(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_rmdir_args /* {
+		syscallarg(char *) path;
+	} */ *uap = v;
+	caddr_t sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
+
+	return sys_rmdir(p, uap, retval);
+}
+
+int
+linux_sys_symlink(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_symlink_args /* {
+		syscallarg(char *) path;
+		syscallarg(char *) to;
+	} */ *uap = v;
+	caddr_t sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
+	LINUX_CHECK_ALT_CREAT(p, &sg, SCARG(uap, to));
+
+	return sys_symlink(p, uap, retval);
+}
+
+int
+linux_sys_readlink(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_readlink_args /* {
+		syscallarg(char *) name;
+		syscallarg(char *) buf;
+		syscallarg(int) count;
+	} */ *uap = v;
+	caddr_t sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, name));
+
+	return sys_readlink(p, uap, retval);
+}
+
+int
+linux_sys_truncate(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	struct linux_sys_truncate_args /* {
+		syscallarg(char *) path;
+		syscallarg(long) length;
+	} */ *uap = v;
+	caddr_t sg = stackgap_init(p->p_emul);
+
+	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
+
+	return compat_43_sys_truncate(p, uap, retval);
+}