freebsd-dev/sys/i386/ibcs2/ibcs2_misc.c

/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (c) 1995 Steven Wallace
 * Copyright (c) 1994, 1995 Scott Bartram
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Lawrence Berkeley Laboratory.
 *
 * 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 by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 *
 * from: Header: sun_misc.c,v 1.16 93/04/07 02:46:27 torek Exp 
 *
 *	@(#)sun_misc.c	8.1 (Berkeley) 6/18/93
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

/*
 * IBCS2 compatibility module.
 *
 * IBCS2 system calls that are implemented differently in BSD are
 * handled here.
 */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/capsicum.h>
#include <sys/dirent.h>
#include <sys/fcntl.h>
#include <sys/filedesc.h>
#include <sys/imgact.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/file.h>			/* Must come after sys/malloc.h */
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/priv.h>
#include <sys/reboot.h>
#include <sys/resourcevar.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/syscallsubr.h>
#include <sys/sysproto.h>
#include <sys/time.h>
#include <sys/times.h>
#include <sys/vnode.h>
#include <sys/wait.h>

#include <machine/cpu.h>

#include <i386/ibcs2/ibcs2_dirent.h>
#include <i386/ibcs2/ibcs2_signal.h>
#include <i386/ibcs2/ibcs2_proto.h>
#include <i386/ibcs2/ibcs2_unistd.h>
#include <i386/ibcs2/ibcs2_util.h>
#include <i386/ibcs2/ibcs2_utime.h>
#include <i386/ibcs2/ibcs2_xenix.h>

#include <security/mac/mac_framework.h>

int
ibcs2_ulimit(struct thread *td, struct ibcs2_ulimit_args *uap)
{
	struct rlimit rl;
	int error;
#define IBCS2_GETFSIZE		1
#define IBCS2_SETFSIZE		2
#define IBCS2_GETPSIZE		3
#define IBCS2_GETDTABLESIZE	4

	switch (uap->cmd) {
	case IBCS2_GETFSIZE:
		td->td_retval[0] = lim_cur(td, RLIMIT_FSIZE);
		if (td->td_retval[0] == -1)
			td->td_retval[0] = 0x7fffffff;
		return 0;
	case IBCS2_SETFSIZE:
		rl.rlim_max = lim_max(td, RLIMIT_FSIZE);
		rl.rlim_cur = uap->newlimit;
		error = kern_setrlimit(td, RLIMIT_FSIZE, &rl);
		if (!error) {
			td->td_retval[0] = lim_cur(td, RLIMIT_FSIZE);
		} else {
			DPRINTF(("failed "));
		}
		return error;
	case IBCS2_GETPSIZE:
		td->td_retval[0] = lim_cur(td, RLIMIT_RSS); /* XXX */
		return 0;
	case IBCS2_GETDTABLESIZE:
		uap->cmd = IBCS2_SC_OPEN_MAX;
		return ibcs2_sysconf(td, (struct ibcs2_sysconf_args *)uap);
	default:
		return ENOSYS;
	}
}

#define IBCS2_WSTOPPED       0177
#define IBCS2_STOPCODE(sig)  ((sig) << 8 | IBCS2_WSTOPPED)
int
ibcs2_wait(struct thread *td, struct ibcs2_wait_args *uap)
{
	int error, options, status;
	int *statusp;
	pid_t pid;
        struct trapframe *tf = td->td_frame;
	
	if ((tf->tf_eflags & (PSL_Z|PSL_PF|PSL_N|PSL_V))
            == (PSL_Z|PSL_PF|PSL_N|PSL_V)) {
		/* waitpid */
		pid = uap->a1;
		statusp = (int *)uap->a2;
		options = uap->a3;
	} else {
		/* wait */
		pid = WAIT_ANY;
		statusp = (int *)uap->a1;
		options = 0;
	}
	error = kern_wait(td, pid, &status, options, NULL);
	if (error)
		return error;
	if (statusp) {
		/*
		 * Convert status/signal result.
		 */
		if (WIFSTOPPED(status)) {
			if (WSTOPSIG(status) <= 0 ||
			    WSTOPSIG(status) > IBCS2_SIGTBLSZ)
				return (EINVAL);
			status =
			  IBCS2_STOPCODE(bsd_to_ibcs2_sig[_SIG_IDX(WSTOPSIG(status))]);
		} else if (WIFSIGNALED(status)) {
			if (WTERMSIG(status) <= 0 ||
			    WTERMSIG(status) > IBCS2_SIGTBLSZ)
				return (EINVAL);
			status = bsd_to_ibcs2_sig[_SIG_IDX(WTERMSIG(status))];
		}
		/* else exit status -- identical */

		/* record result/status */
		td->td_retval[1] = status;
		return copyout(&status, statusp, sizeof(status));
	}

	return 0;
}

int
ibcs2_execv(struct thread *td, struct ibcs2_execv_args *uap)
{
	struct image_args eargs;
	struct vmspace *oldvmspace;
	char *path;
	int error;

        CHECKALTEXIST(td, uap->path, &path);

	error = pre_execve(td, &oldvmspace);
	if (error != 0) {
		free(path, M_TEMP);
		return (error);
	}
	error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, uap->argp, NULL);
	free(path, M_TEMP);
	if (error == 0)
		error = kern_execve(td, &eargs, NULL);
	post_execve(td, error, oldvmspace);
	return (error);
}

int
ibcs2_execve(struct thread *td, struct ibcs2_execve_args *uap)
{
	struct image_args eargs;
	struct vmspace *oldvmspace;
	char *path;
	int error;

        CHECKALTEXIST(td, uap->path, &path);

	error = pre_execve(td, &oldvmspace);
	if (error != 0) {
		free(path, M_TEMP);
		return (error);
	}
	error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, uap->argp,
	    uap->envp);
	free(path, M_TEMP);
	if (error == 0)
		error = kern_execve(td, &eargs, NULL);
	post_execve(td, error, oldvmspace);
	return (error);
}

int
ibcs2_umount(struct thread *td, struct ibcs2_umount_args *uap)
{
	struct unmount_args um;

	um.path = uap->name;
	um.flags = 0;
	return sys_unmount(td, &um);
}

int
ibcs2_mount(struct thread *td, struct ibcs2_mount_args *uap)
{
#ifdef notyet
	int oflags = uap->flags, nflags, error;
	char fsname[MFSNAMELEN];

	if (oflags & (IBCS2_MS_NOSUB | IBCS2_MS_SYS5))
		return (EINVAL);
	if ((oflags & IBCS2_MS_NEWTYPE) == 0)
		return (EINVAL);
	nflags = 0;
	if (oflags & IBCS2_MS_RDONLY)
		nflags |= MNT_RDONLY;
	if (oflags & IBCS2_MS_NOSUID)
		nflags |= MNT_NOSUID;
	if (oflags & IBCS2_MS_REMOUNT)
		nflags |= MNT_UPDATE;
	uap->flags = nflags;

	if (error = copyinstr((caddr_t)uap->type, fsname, sizeof fsname,
			      (u_int *)0))
		return (error);

	if (strcmp(fsname, "4.2") == 0) {
		uap->type = (caddr_t)STACK_ALLOC();
		if (error = copyout("ufs", uap->type, sizeof("ufs")))
			return (error);
	} else if (strcmp(fsname, "nfs") == 0) {
		struct ibcs2_nfs_args sna;
		struct sockaddr_in sain;
		struct nfs_args na;
		struct sockaddr sa;

		if (error = copyin(uap->data, &sna, sizeof sna))
			return (error);
		if (error = copyin(sna.addr, &sain, sizeof sain))
			return (error);
		bcopy(&sain, &sa, sizeof sa);
		sa.sa_len = sizeof(sain);
		uap->data = (caddr_t)STACK_ALLOC();
		na.addr = (struct sockaddr *)((int)uap->data + sizeof na);
		na.sotype = SOCK_DGRAM;
		na.proto = IPPROTO_UDP;
		na.fh = (nfsv2fh_t *)sna.fh;
		na.flags = sna.flags;
		na.wsize = sna.wsize;
		na.rsize = sna.rsize;
		na.timeo = sna.timeo;
		na.retrans = sna.retrans;
		na.hostname = sna.hostname;

		if (error = copyout(&sa, na.addr, sizeof sa))
			return (error);
		if (error = copyout(&na, uap->data, sizeof na))
			return (error);
	}
	return (mount(td, uap));
#else
	return EINVAL;
#endif
}

/*
 * Read iBCS2-style directory entries.  We suck them into kernel space so
 * that they can be massaged before being copied out to user code.  Like
 * SunOS, we squish out `empty' entries.
 *
 * This is quite ugly, but what do you expect from compatibility code?
 */

int
ibcs2_getdents(struct thread *td, struct ibcs2_getdents_args *uap)
{
	struct vnode *vp;
	caddr_t inp, buf;		/* BSD-format */
	int len, reclen;		/* BSD-format */
	caddr_t outp;			/* iBCS2-format */
	int resid;			/* iBCS2-format */
	cap_rights_t rights;
	struct file *fp;
	struct uio auio;
	struct iovec aiov;
	struct ibcs2_dirent idb;
	off_t off;			/* true file offset */
	int buflen, error, eofflag;
	u_long *cookies = NULL, *cookiep;
	int ncookies;
#define	BSD_DIRENT(cp)		((struct dirent *)(cp))
#define	IBCS2_RECLEN(reclen)	(reclen + sizeof(u_short))

	memset(&idb, 0, sizeof(idb));
	error = getvnode(td, uap->fd, cap_rights_init(&rights, CAP_READ), &fp);
	if (error != 0)
		return (error);
	if ((fp->f_flag & FREAD) == 0) {
		fdrop(fp, td);
		return (EBADF);
	}
	vp = fp->f_vnode;
	if (vp->v_type != VDIR) {	/* XXX  vnode readdir op should do this */
		fdrop(fp, td);
		return (EINVAL);
	}

	off = fp->f_offset;
#define	DIRBLKSIZ	512		/* XXX we used to use ufs's DIRBLKSIZ */
	buflen = max(DIRBLKSIZ, uap->nbytes);
	buflen = min(buflen, MAXBSIZE);
	buf = malloc(buflen, M_TEMP, M_WAITOK);
	vn_lock(vp, LK_SHARED | LK_RETRY);
again:
	aiov.iov_base = buf;
	aiov.iov_len = buflen;
	auio.uio_iov = &aiov;
	auio.uio_iovcnt = 1;
	auio.uio_rw = UIO_READ;
	auio.uio_segflg = UIO_SYSSPACE;
	auio.uio_td = td;
	auio.uio_resid = buflen;
	auio.uio_offset = off;

	if (cookies) {
		free(cookies, M_TEMP);
		cookies = NULL;
	}

#ifdef MAC
	error = mac_vnode_check_readdir(td->td_ucred, vp);
	if (error)
		goto out;
#endif

	/*
	 * First we read into the malloc'ed buffer, then
	 * we massage it into user space, one record at a time.
	 */
	if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies, &cookies)) != 0)
		goto out;
	inp = buf;
	outp = uap->buf;
	resid = uap->nbytes;
	if ((len = buflen - auio.uio_resid) <= 0)
		goto eof;

	cookiep = cookies;

	if (cookies) {
		/*
		 * When using cookies, the vfs has the option of reading from
		 * a different offset than that supplied (UFS truncates the
		 * offset to a block boundary to make sure that it never reads
		 * partway through a directory entry, even if the directory
		 * has been compacted).
		 */
		while (len > 0 && ncookies > 0 && *cookiep <= off) {
			len -= BSD_DIRENT(inp)->d_reclen;
			inp += BSD_DIRENT(inp)->d_reclen;
			cookiep++;
			ncookies--;
		}
	}

	for (; len > 0; len -= reclen) {
		if (cookiep && ncookies == 0)
			break;
		reclen = BSD_DIRENT(inp)->d_reclen;
		if (reclen & 3) {
		        printf("ibcs2_getdents: reclen=%d\n", reclen);
		        error = EFAULT;
			goto out;
		}
		if (BSD_DIRENT(inp)->d_fileno == 0) {
			inp += reclen;	/* it is a hole; squish it out */
			if (cookiep) {
				off = *cookiep++;
				ncookies--;
			} else
				off += reclen;
			continue;
		}
		if (reclen > len || resid < IBCS2_RECLEN(reclen)) {
			/* entry too big for buffer, so just stop */
			outp++;
			break;
		}
		/*
		 * Massage in place to make an iBCS2-shaped dirent (otherwise
		 * we have to worry about touching user memory outside of
		 * the copyout() call).
		 */
		idb.d_ino = (ibcs2_ino_t)BSD_DIRENT(inp)->d_fileno;
		idb.d_off = (ibcs2_off_t)off;
		idb.d_reclen = (u_short)IBCS2_RECLEN(reclen);
		if ((error = copyout((caddr_t)&idb, outp, 10)) != 0 ||
		    (error = copyout(BSD_DIRENT(inp)->d_name, outp + 10,
				     BSD_DIRENT(inp)->d_namlen + 1)) != 0)
			goto out;
		/* advance past this real entry */
		if (cookiep) {
			off = *cookiep++;
			ncookies--;
		} else
			off += reclen;
		inp += reclen;
		/* advance output past iBCS2-shaped entry */
		outp += IBCS2_RECLEN(reclen);
		resid -= IBCS2_RECLEN(reclen);
	}
	/* if we squished out the whole block, try again */
	if (outp == uap->buf)
		goto again;
	fp->f_offset = off;		/* update the vnode offset */
eof:
	td->td_retval[0] = uap->nbytes - resid;
out:
	VOP_UNLOCK(vp, 0);
	fdrop(fp, td);
	if (cookies)
		free(cookies, M_TEMP);
	free(buf, M_TEMP);
	return (error);
}

int
ibcs2_read(struct thread *td, struct ibcs2_read_args *uap)
{
	struct vnode *vp;
	caddr_t inp, buf;		/* BSD-format */
	int len, reclen;		/* BSD-format */
	caddr_t outp;			/* iBCS2-format */
	int resid;			/* iBCS2-format */
	cap_rights_t rights;
	struct file *fp;
	struct uio auio;
	struct iovec aiov;
	struct ibcs2_direct {
		ibcs2_ino_t ino;
		char name[14];
	} idb;
	off_t off;			/* true file offset */
	int buflen, error, eofflag, size;
	u_long *cookies = NULL, *cookiep;
	int ncookies;

	error = getvnode(td, uap->fd, cap_rights_init(&rights, CAP_READ), &fp);
	if (error != 0) {
		if (error == EINVAL)
			return sys_read(td, (struct read_args *)uap);
		else
			return error;
	}
	if ((fp->f_flag & FREAD) == 0) {
		fdrop(fp, td);
		return (EBADF);
	}
	vp = fp->f_vnode;
	if (vp->v_type != VDIR) {
		fdrop(fp, td);
		return sys_read(td, (struct read_args *)uap);
	}

	off = fp->f_offset;

	DPRINTF(("ibcs2_read: read directory\n"));

	buflen = max(DIRBLKSIZ, uap->nbytes);
	buflen = min(buflen, MAXBSIZE);
	buf = malloc(buflen, M_TEMP, M_WAITOK);
	vn_lock(vp, LK_SHARED | LK_RETRY);
again:
	aiov.iov_base = buf;
	aiov.iov_len = buflen;
	auio.uio_iov = &aiov;
	auio.uio_iovcnt = 1;
	auio.uio_rw = UIO_READ;
	auio.uio_segflg = UIO_SYSSPACE;
	auio.uio_td = td;
	auio.uio_resid = buflen;
	auio.uio_offset = off;

	if (cookies) {
		free(cookies, M_TEMP);
		cookies = NULL;
	}

#ifdef MAC
	error = mac_vnode_check_readdir(td->td_ucred, vp);
	if (error)
		goto out;
#endif

	/*
	 * First we read into the malloc'ed buffer, then
	 * we massage it into user space, one record at a time.
	 */
	if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies, &cookies)) != 0) {
		DPRINTF(("VOP_READDIR failed: %d\n", error));
		goto out;
	}
	inp = buf;
	outp = uap->buf;
	resid = uap->nbytes;
	if ((len = buflen - auio.uio_resid) <= 0)
		goto eof;

	cookiep = cookies;

	if (cookies) {
		/*
		 * When using cookies, the vfs has the option of reading from
		 * a different offset than that supplied (UFS truncates the
		 * offset to a block boundary to make sure that it never reads
		 * partway through a directory entry, even if the directory
		 * has been compacted).
		 */
		while (len > 0 && ncookies > 0 && *cookiep <= off) {
			len -= BSD_DIRENT(inp)->d_reclen;
			inp += BSD_DIRENT(inp)->d_reclen;
			cookiep++;
			ncookies--;
		}
	}

	for (; len > 0 && resid > 0; len -= reclen) {
		if (cookiep && ncookies == 0)
			break;
		reclen = BSD_DIRENT(inp)->d_reclen;
		if (reclen & 3) {
		        printf("ibcs2_read: reclen=%d\n", reclen);
		        error = EFAULT;
			goto out;
		}
		if (BSD_DIRENT(inp)->d_fileno == 0) {
			inp += reclen;	/* it is a hole; squish it out */
			if (cookiep) {
				off = *cookiep++;
				ncookies--;
			} else
				off += reclen;
			continue;
		}
		if (reclen > len || resid < sizeof(struct ibcs2_direct)) {
			/* entry too big for buffer, so just stop */
			outp++;
			break;
		}
		/*
		 * Massage in place to make an iBCS2-shaped dirent (otherwise
		 * we have to worry about touching user memory outside of
		 * the copyout() call).
		 *
		 * TODO: if length(filename) > 14, then break filename into
		 * multiple entries and set inode = 0xffff except last
		 */
		idb.ino = (BSD_DIRENT(inp)->d_fileno > 0xfffe) ? 0xfffe :
			BSD_DIRENT(inp)->d_fileno;
		(void)copystr(BSD_DIRENT(inp)->d_name, idb.name, 14, &size);
		bzero(idb.name + size, 14 - size);
		if ((error = copyout(&idb, outp, sizeof(struct ibcs2_direct))) != 0)
			goto out;
		/* advance past this real entry */
		if (cookiep) {
			off = *cookiep++;
			ncookies--;
		} else
			off += reclen;
		inp += reclen;
		/* advance output past iBCS2-shaped entry */
		outp += sizeof(struct ibcs2_direct);
		resid -= sizeof(struct ibcs2_direct);
	}
	/* if we squished out the whole block, try again */
	if (outp == uap->buf)
		goto again;
	fp->f_offset = off;		/* update the vnode offset */
eof:
	td->td_retval[0] = uap->nbytes - resid;
out:
	VOP_UNLOCK(vp, 0);
	fdrop(fp, td);
	if (cookies)
		free(cookies, M_TEMP);
	free(buf, M_TEMP);
	return (error);
}

int
ibcs2_mknod(struct thread *td, struct ibcs2_mknod_args *uap)
{
	char *path;
	int error;

        CHECKALTCREAT(td, uap->path, &path);
	if (S_ISFIFO(uap->mode)) {
		error = kern_mkfifoat(td, AT_FDCWD, path,
		    UIO_SYSSPACE, uap->mode);
	} else {
		error = kern_mknodat(td, AT_FDCWD, path, UIO_SYSSPACE,
		    uap->mode, uap->dev);
	}
	free(path, M_TEMP);
	return (error);
}

int
ibcs2_getgroups(struct thread *td, struct ibcs2_getgroups_args *uap)
{
	struct ucred *cred;
	ibcs2_gid_t *iset;
	u_int i, ngrp;
	int error;

	cred = td->td_ucred;
	ngrp = cred->cr_ngroups;

	if (uap->gidsetsize == 0) {
		error = 0;
		goto out;
	}
	if (uap->gidsetsize < ngrp)
		return (EINVAL);

	iset = malloc(ngrp * sizeof(*iset), M_TEMP, M_WAITOK);
	for (i = 0; i < ngrp; i++)
		iset[i] = (ibcs2_gid_t)cred->cr_groups[i];
	error = copyout(iset, uap->gidset, ngrp * sizeof(ibcs2_gid_t));
	free(iset, M_TEMP);
out:
	td->td_retval[0] = ngrp;
	return (error);
}

int
ibcs2_setgroups(struct thread *td, struct ibcs2_setgroups_args *uap)
{
	ibcs2_gid_t *iset;
	gid_t *gp;
	int error, i;

	if (uap->gidsetsize < 0 || uap->gidsetsize > ngroups_max + 1)
		return (EINVAL);
	if (uap->gidsetsize && uap->gidset == NULL)
		return (EINVAL);
	gp = malloc(uap->gidsetsize * sizeof(*gp), M_TEMP, M_WAITOK);
	if (uap->gidsetsize) {
		iset = malloc(uap->gidsetsize * sizeof(*iset), M_TEMP, M_WAITOK);
		error = copyin(uap->gidset, iset, sizeof(ibcs2_gid_t) *
		    uap->gidsetsize);
		if (error) {
			free(iset, M_TEMP);
			goto out;
		}
		for (i = 0; i < uap->gidsetsize; i++)
			gp[i] = (gid_t)iset[i];
	}

	error = kern_setgroups(td, uap->gidsetsize, gp);
out:
	free(gp, M_TEMP);
	return (error);
}

int
ibcs2_setuid(struct thread *td, struct ibcs2_setuid_args *uap)
{
	struct setuid_args sa;

	sa.uid = (uid_t)uap->uid;
	return sys_setuid(td, &sa);
}

int
ibcs2_setgid(struct thread *td, struct ibcs2_setgid_args *uap)
{
	struct setgid_args sa;

	sa.gid = (gid_t)uap->gid;
	return sys_setgid(td, &sa);
}

int
ibcs2_time(struct thread *td, struct ibcs2_time_args *uap)
{
	struct timeval tv;

	microtime(&tv);
	td->td_retval[0] = tv.tv_sec;
	if (uap->tp)
		return copyout((caddr_t)&tv.tv_sec, (caddr_t)uap->tp,
			       sizeof(ibcs2_time_t));
	else
		return 0;
}

int
ibcs2_pathconf(struct thread *td, struct ibcs2_pathconf_args *uap)
{
	char *path;
	long value;
	int error;

	CHECKALTEXIST(td, uap->path, &path);
	uap->name++;	/* iBCS2 _PC_* defines are offset by one */
	error = kern_pathconf(td, path, UIO_SYSSPACE, uap->name, FOLLOW,
	    &value);
	free(path, M_TEMP);
	if (error == 0)
		td->td_retval[0] = value;
	return (error);
}

int
ibcs2_fpathconf(struct thread *td, struct ibcs2_fpathconf_args *uap)
{
	uap->name++;	/* iBCS2 _PC_* defines are offset by one */
        return sys_fpathconf(td, (struct fpathconf_args *)uap);
}

int
ibcs2_sysconf(struct thread *td, struct ibcs2_sysconf_args *uap)
{
	int mib[2], value, len, error;

	switch(uap->name) {
	case IBCS2_SC_ARG_MAX:
		mib[1] = KERN_ARGMAX;
		break;

	case IBCS2_SC_CHILD_MAX:
		td->td_retval[0] = lim_cur(td, RLIMIT_NPROC);
		return 0;

	case IBCS2_SC_CLK_TCK:
		td->td_retval[0] = hz;
		return 0;

	case IBCS2_SC_NGROUPS_MAX:
		mib[1] = KERN_NGROUPS;
		break;

	case IBCS2_SC_OPEN_MAX:
		td->td_retval[0] = lim_cur(td, RLIMIT_NOFILE);
		return 0;
		
	case IBCS2_SC_JOB_CONTROL:
		mib[1] = KERN_JOB_CONTROL;
		break;
		
	case IBCS2_SC_SAVED_IDS:
		mib[1] = KERN_SAVED_IDS;
		break;
		
	case IBCS2_SC_VERSION:
		mib[1] = KERN_POSIX1;
		break;
		
	case IBCS2_SC_PASS_MAX:
		td->td_retval[0] = 128;		/* XXX - should we create PASS_MAX ? */
		return 0;

	case IBCS2_SC_XOPEN_VERSION:
		td->td_retval[0] = 2;		/* XXX: What should that be? */
		return 0;
		
	default:
		return EINVAL;
	}

	mib[0] = CTL_KERN;
	len = sizeof(value);
	error = kernel_sysctl(td, mib, 2, &value, &len, NULL, 0, NULL, 0);
	if (error)
		return error;
	td->td_retval[0] = value;
	return 0;
}

int
ibcs2_alarm(struct thread *td, struct ibcs2_alarm_args *uap)
{
	struct itimerval itv, oitv;
	int error;

	timevalclear(&itv.it_interval);
	itv.it_value.tv_sec = uap->sec;
	itv.it_value.tv_usec = 0;
	error = kern_setitimer(td, ITIMER_REAL, &itv, &oitv);
	if (error)
		return (error);
	if (oitv.it_value.tv_usec != 0)
		oitv.it_value.tv_sec++;
	td->td_retval[0] = oitv.it_value.tv_sec;
	return (0);
}

int
ibcs2_times(struct thread *td, struct ibcs2_times_args *uap)
{
	struct rusage ru;
	struct timeval t;
	struct tms tms;
	int error;

#define CONVTCK(r)      (r.tv_sec * hz + r.tv_usec / (1000000 / hz))

	error = kern_getrusage(td, RUSAGE_SELF, &ru);
	if (error)
		return (error);
	tms.tms_utime = CONVTCK(ru.ru_utime);
	tms.tms_stime = CONVTCK(ru.ru_stime);

	error = kern_getrusage(td, RUSAGE_CHILDREN, &ru);
	if (error)
		return (error);
	tms.tms_cutime = CONVTCK(ru.ru_utime);
	tms.tms_cstime = CONVTCK(ru.ru_stime);

	microtime(&t);
	td->td_retval[0] = CONVTCK(t);
	
	return (copyout(&tms, uap->tp, sizeof(struct tms)));
}

int
ibcs2_stime(struct thread *td, struct ibcs2_stime_args *uap)
{
	struct timeval tv;
	long secs;
	int error;

	error = copyin(uap->timep, &secs, sizeof(long));
	if (error)
		return (error);
	tv.tv_sec = secs;
	tv.tv_usec = 0;
	error = kern_settimeofday(td, &tv, NULL);
	if (error)
		error = EPERM;
	return (error);
}

int
ibcs2_utime(struct thread *td, struct ibcs2_utime_args *uap)
{
	struct ibcs2_utimbuf ubuf;
	struct timeval tbuf[2], *tp;
	char *path;
	int error;

	if (uap->buf) {
		error = copyin(uap->buf, &ubuf, sizeof(ubuf));
		if (error)
			return (error);
		tbuf[0].tv_sec = ubuf.actime;
		tbuf[0].tv_usec = 0;
		tbuf[1].tv_sec = ubuf.modtime;
		tbuf[1].tv_usec = 0;
		tp = tbuf;
	} else
		tp = NULL;

        CHECKALTEXIST(td, uap->path, &path);
	error = kern_utimesat(td, AT_FDCWD, path, UIO_SYSSPACE,
	    tp, UIO_SYSSPACE);
	free(path, M_TEMP);
	return (error);
}

int
ibcs2_nice(struct thread *td, struct ibcs2_nice_args *uap)
{
	int error;
	struct setpriority_args sa;

	sa.which = PRIO_PROCESS;
	sa.who = 0;
	sa.prio = td->td_proc->p_nice + uap->incr;
	if ((error = sys_setpriority(td, &sa)) != 0)
		return EPERM;
	td->td_retval[0] = td->td_proc->p_nice;
	return 0;
}

/*
 * iBCS2 getpgrp, setpgrp, setsid, and setpgid
 */

int
ibcs2_pgrpsys(struct thread *td, struct ibcs2_pgrpsys_args *uap)
{
	struct proc *p = td->td_proc;
	switch (uap->type) {
	case 0:			/* getpgrp */
		PROC_LOCK(p);
		td->td_retval[0] = p->p_pgrp->pg_id;
		PROC_UNLOCK(p);
		return 0;

	case 1:			/* setpgrp */
	    {
		struct setpgid_args sa;

		sa.pid = 0;
		sa.pgid = 0;
		sys_setpgid(td, &sa);
		PROC_LOCK(p);
		td->td_retval[0] = p->p_pgrp->pg_id;
		PROC_UNLOCK(p);
		return 0;
	    }

	case 2:			/* setpgid */
	    {
		struct setpgid_args sa;

		sa.pid = uap->pid;
		sa.pgid = uap->pgid;
		return sys_setpgid(td, &sa);
	    }

	case 3:			/* setsid */
		return sys_setsid(td, NULL);

	default:
		return EINVAL;
	}
}

/*
 * XXX - need to check for nested calls
 */

int
ibcs2_plock(struct thread *td, struct ibcs2_plock_args *uap)
{
	int error;
#define IBCS2_UNLOCK	0
#define IBCS2_PROCLOCK	1
#define IBCS2_TEXTLOCK	2
#define IBCS2_DATALOCK	4

	
	switch(uap->cmd) {
	case IBCS2_UNLOCK:
        	error = priv_check(td, PRIV_VM_MUNLOCK);
		if (error)
			return (error);
		/* XXX - TODO */
		return (0);

	case IBCS2_PROCLOCK:
	case IBCS2_TEXTLOCK:
	case IBCS2_DATALOCK:
        	error = priv_check(td, PRIV_VM_MLOCK);
		if (error)
			return (error);
		/* XXX - TODO */
		return 0;
	}
	return EINVAL;
}

int
ibcs2_uadmin(struct thread *td, struct ibcs2_uadmin_args *uap)
{
#define SCO_A_REBOOT        1
#define SCO_A_SHUTDOWN      2
#define SCO_A_REMOUNT       4
#define SCO_A_CLOCK         8
#define SCO_A_SETCONFIG     128
#define SCO_A_GETDEV        130

#define SCO_AD_HALT         0
#define SCO_AD_BOOT         1
#define SCO_AD_IBOOT        2
#define SCO_AD_PWRDOWN      3
#define SCO_AD_PWRNAP       4

#define SCO_AD_PANICBOOT    1

#define SCO_AD_GETBMAJ      0
#define SCO_AD_GETCMAJ      1

	switch(uap->cmd) {
	case SCO_A_REBOOT:
	case SCO_A_SHUTDOWN:
		switch(uap->func) {
			struct reboot_args r;
		case SCO_AD_HALT:
		case SCO_AD_PWRDOWN:
		case SCO_AD_PWRNAP:
			r.opt = RB_HALT;
			return (sys_reboot(td, &r));
		case SCO_AD_BOOT:
		case SCO_AD_IBOOT:
			r.opt = RB_AUTOBOOT;
			return (sys_reboot(td, &r));
		}
		return EINVAL;
	case SCO_A_REMOUNT:
	case SCO_A_CLOCK:
	case SCO_A_SETCONFIG:
		return 0;
	case SCO_A_GETDEV:
		return EINVAL;	/* XXX - TODO */
	}
	return EINVAL;
}

int
ibcs2_sysfs(struct thread *td, struct ibcs2_sysfs_args *uap)
{
#define IBCS2_GETFSIND        1
#define IBCS2_GETFSTYP        2
#define IBCS2_GETNFSTYP       3

	switch(uap->cmd) {
	case IBCS2_GETFSIND:
	case IBCS2_GETFSTYP:
	case IBCS2_GETNFSTYP:
		break;
	}
	return EINVAL;		/* XXX - TODO */
}

int
ibcs2_unlink(struct thread *td, struct ibcs2_unlink_args *uap)
{
	char *path;
	int error;

	CHECKALTEXIST(td, uap->path, &path);
	error = kern_unlinkat(td, AT_FDCWD, path, UIO_SYSSPACE, 0);
	free(path, M_TEMP);
	return (error);
}

int
ibcs2_chdir(struct thread *td, struct ibcs2_chdir_args *uap)
{
	char *path;
	int error;

	CHECKALTEXIST(td, uap->path, &path);
	error = kern_chdir(td, path, UIO_SYSSPACE);
	free(path, M_TEMP);
	return (error);
}

int
ibcs2_chmod(struct thread *td, struct ibcs2_chmod_args *uap)
{
	char *path;
	int error;

	CHECKALTEXIST(td, uap->path, &path);
	error = kern_fchmodat(td, AT_FDCWD, path, UIO_SYSSPACE, uap->mode, 0);
	free(path, M_TEMP);
	return (error);
}

int
ibcs2_chown(struct thread *td, struct ibcs2_chown_args *uap)
{
	char *path;
	int error;

	CHECKALTEXIST(td, uap->path, &path);
	error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, uap->uid,
	    uap->gid, 0);
	free(path, M_TEMP);
	return (error);
}

int
ibcs2_rmdir(struct thread *td, struct ibcs2_rmdir_args *uap)
{
	char *path;
	int error;

	CHECKALTEXIST(td, uap->path, &path);
	error = kern_rmdirat(td, AT_FDCWD, path, UIO_SYSSPACE);
	free(path, M_TEMP);
	return (error);
}

int
ibcs2_mkdir(struct thread *td, struct ibcs2_mkdir_args *uap)
{
	char *path;
	int error;

	CHECKALTEXIST(td, uap->path, &path);
	error = kern_mkdirat(td, AT_FDCWD, path, UIO_SYSSPACE, uap->mode);
	free(path, M_TEMP);
	return (error);
}

int
ibcs2_symlink(struct thread *td, struct ibcs2_symlink_args *uap)
{
	char *path, *link;
	int error;

	CHECKALTEXIST(td, uap->path, &path);

	/*
	 * Have to expand CHECKALTCREAT() so that 'path' can be freed on
	 * errors.
	 */
	error = ibcs2_emul_find(td, uap->link, UIO_USERSPACE, &link, 1);
	if (link == NULL) {
		free(path, M_TEMP);
		return (error);
	}
	error = kern_symlinkat(td, path, AT_FDCWD, link, UIO_SYSSPACE);
	free(path, M_TEMP);
	free(link, M_TEMP);
	return (error);
}

int
ibcs2_rename(struct thread *td, struct ibcs2_rename_args *uap)
{
	char *from, *to;
	int error;

	CHECKALTEXIST(td, uap->from, &from);

	/*
	 * Have to expand CHECKALTCREAT() so that 'from' can be freed on
	 * errors.
	 */
	error = ibcs2_emul_find(td, uap->to, UIO_USERSPACE, &to, 1);
	if (to == NULL) {
		free(from, M_TEMP);
		return (error);
	}
	error = kern_renameat(td, AT_FDCWD, from, AT_FDCWD, to, UIO_SYSSPACE);
	free(from, M_TEMP);
	free(to, M_TEMP);
	return (error);
}

int
ibcs2_readlink(struct thread *td, struct ibcs2_readlink_args *uap)
{
	char *path;
	int error;

	CHECKALTEXIST(td, uap->path, &path);
	error = kern_readlinkat(td, AT_FDCWD, path, UIO_SYSSPACE,
	    uap->buf, UIO_USERSPACE, uap->count);
	free(path, M_TEMP);
	return (error);
}