NetBSD/sys/compat/svr4/svr4_misc.c

/*	$NetBSD: svr4_misc.c,v 1.24 1995/07/02 06:16:09 christos Exp $	 */

/*
 * Copyright (c) 1994 Christos Zoulas
 * 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. 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.
 */

/*
 * SVR4 compatibility module.
 *
 * SVR4 system calls that are implemented differently in BSD are
 * handled here.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/dir.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/resource.h>
#include <sys/resourcevar.h>
#include <sys/socket.h>
#include <sys/vnode.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <sys/utsname.h>
#include <sys/unistd.h>
#include <sys/times.h>
#include <sys/sem.h>
#include <sys/msg.h>

#include <netinet/in.h>
#include <sys/syscallargs.h>

#include <miscfs/specfs/specdev.h>

#include <compat/svr4/svr4_types.h>
#include <compat/svr4/svr4_signal.h>
#include <compat/svr4/svr4_syscallargs.h>
#include <compat/svr4/svr4_util.h>
#include <compat/svr4/svr4_time.h>
#include <compat/svr4/svr4_dirent.h>
#include <compat/svr4/svr4_ulimit.h>
#include <compat/svr4/svr4_hrt.h>
#include <compat/svr4/svr4_wait.h>
#include <compat/svr4/svr4_statvfs.h>
#include <compat/svr4/svr4_sysconfig.h>

#include <vm/vm.h>
/* XXX */ extern struct proc *pfind();

static __inline clock_t timeval_to_clock_t __P((struct timeval *));
static int svr4_setinfo	__P((struct proc *, int, svr4_siginfo_t *));

struct svr4_hrtcntl_args;
static int svr4_hrtcntl	__P((struct proc *, struct svr4_hrtcntl_args *,
			     register_t *));
static void bsd_statfs_to_svr4_statvfs __P((const struct statfs *,
					    struct svr4_statvfs *));
static struct proc *svr4_pfind __P((pid_t pid));

int
svr4_wait(p, uap, retval)
	register struct proc		*p;
	register struct svr4_wait_args	*uap;
	register_t			*retval;
{
	struct wait4_args w4;
	int error;
	size_t sz = sizeof(*SCARG(&w4, status));

	SCARG(&w4, rusage) = NULL;
	SCARG(&w4, options) = 0;

	if (SCARG(uap, status) == NULL) {
		caddr_t sg = stackgap_init(p->p_emul);
		SCARG(&w4, status) = stackgap_alloc(&sg, sz);
	}
	else
		SCARG(&w4, status) = SCARG(uap, status);

	SCARG(&w4, pid) = WAIT_ANY;

	if ((error = wait4(p, &w4, retval)) != 0)
		return error;

	/*
	 * It looks like wait(2) on svr4/solaris/2.4 returns
	 * the status in retval[1], and the pid on retval[0].
	 * NB: this can break if register_t stops being an int.
	 */
	return copyin(SCARG(&w4, status), &retval[1], sz);
}


int
svr4_execv(p, uap, retval)
	register struct proc		*p;
	register struct svr4_execv_args	*uap;
	register_t			*retval;
{
	struct execve_args ex;

	caddr_t sg = stackgap_init(p->p_emul);
	SVR4_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));

	SCARG(&ex, path) = SCARG(uap, path);
	SCARG(&ex, argp) = SCARG(uap, argp);
	SCARG(&ex, envp) = NULL;

	return execve(p, &ex, retval);
}


int
svr4_execve(p, uap, retval)
	register struct proc		*p;
	register struct execve_args	*uap;
	register_t			*retval;
{
	caddr_t sg = stackgap_init(p->p_emul);
	SVR4_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));

	return execve(p, uap, retval);
}


int
svr4_time(p, uap, retval)
	register struct proc		*p;
	register struct svr4_time_args	*uap;
	register_t			*retval;
{
	int		error = 0;
	struct timeval	tv;

	microtime(&tv);
	if (SCARG(uap, t))
		error = copyout(&tv.tv_sec, SCARG(uap, t),
				sizeof(*(SCARG(uap, t))));
	*retval = (int) tv.tv_sec;

	return error;
}


/*
 * Read SVR4-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
svr4_getdents(p, uap, retval)
	register struct proc			*p;
	register struct svr4_getdents_args	*uap;
	register_t				*retval;
{
	struct vnode		*vp;
	caddr_t			 inp, buf;	/* BSD-format */
	int			 len, reclen;	/* BSD-format */
	caddr_t			 outp;		/* SVR4-format */
	int			 resid;		/* SVR4-format */
	struct file		*fp;
	struct uio		 auio;
	struct iovec		 aiov;
	struct svr4_dirent	 idb;
	off_t			 off;		/* true file offset */
	svr4_off_t		 soff;		/* SYSV file offset */
	int			 buflen, error, eofflag;

#define	BSD_DIRENT(cp)		((struct dirent *)(cp))
#define SVR4_DIRENT(cp)		((struct svr4_dirent *)(cp))
#ifdef sparc
#define	SVR4_RECLEN(reclen)	(reclen + sizeof(u_long))
#else
#define	SVR4_RECLEN(reclen)	(reclen + sizeof(u_short))
#endif
#define SVR4_DSIZE(i) (sizeof(i.d_ino) + sizeof(i.d_off) + sizeof(i.d_reclen))

	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
		return (error);
	if ((fp->f_flag & FREAD) == 0)
		return (EBADF);

	vp = (struct vnode *) fp->f_data;

	if (vp->v_type != VDIR)	/* XXX  vnode readdir op should do this */
		return (EINVAL);

	buflen = min(MAXBSIZE, SCARG(uap, nbytes));
	buf = malloc(buflen, M_TEMP, M_WAITOK);
	VOP_LOCK(vp);
	off = fp->f_offset;
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_procp = p;
	auio.uio_resid = buflen;
	auio.uio_offset = off;
	/*
         * First we read into the malloc'ed buffer, then
         * we massage it into user space, one record at a time.
         */
	error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, (u_long *) 0, 0);
	if (error)
		goto out;

	inp = buf;
	outp = SCARG(uap, buf);
	resid = SCARG(uap, nbytes);
	if ((len = buflen - auio.uio_resid) == 0)
		goto eof;

	for (; len > 0; len -= reclen) {
		reclen = ((struct dirent *) inp)->d_reclen;
		if (reclen & 3)
			panic("svr4_getdents");
		off += reclen;	/* each entry points to next */
		if (BSD_DIRENT(inp)->d_fileno == 0) {
			inp += reclen;	/* it is a hole; squish it out */
			continue;
		}
		if (reclen > len || resid < SVR4_RECLEN(reclen)) {
			/* entry too big for buffer, so just stop */
			outp++;
			break;
		}
		/*
		 * Massage in place to make a SVR4-shaped dirent (otherwise
		 * we have to worry about touching user memory outside of
		 * the copyout() call).
		 */
		idb.d_ino = (svr4_ino_t) BSD_DIRENT(inp)->d_fileno;
		idb.d_off = (svr4_off_t) off;
		idb.d_reclen = (u_short) SVR4_RECLEN(reclen);

		if ((error = copyout((caddr_t) & idb, outp,
				     SVR4_DSIZE(idb))) != 0 ||
		    (error = copyout(BSD_DIRENT(inp)->d_name,
				     outp + SVR4_DSIZE(idb),
				     BSD_DIRENT(inp)->d_namlen + 1)) != 0)
			goto out;
		/* advance past this real entry */
		inp += reclen;
		/* advance output past Sun-shaped entry */
		outp += SVR4_RECLEN(reclen);
		resid -= SVR4_RECLEN(reclen);
	}

	/* if we squished out the whole block, try again */
	if (outp == SCARG(uap, buf))
		goto again;
	fp->f_offset = off;	/* update the vnode offset */

eof:
	*retval = SCARG(uap, nbytes) - resid;
out:
	VOP_UNLOCK(vp);
	free(buf, M_TEMP);
	return error;
}

int
svr4_mmap(p, uap, retval)
	register struct proc		*p;
	register struct svr4_mmap_args	*uap;
	register_t			*retval;
{
	struct filedesc		*fdp;
	struct file		*fp;
	struct vnode		*vp;
	struct mmap_args	 mm;
	caddr_t 		 rp;
#define _MAP_NEW	0x80000000
	/*
         * Verify the arguments.
         */
	if (SCARG(uap, prot) & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
		return EINVAL;	/* XXX still needed? */

	SCARG(&mm, prot) = SCARG(uap, prot);
	SCARG(&mm, len) = SCARG(uap, len);
	SCARG(&mm, flags) = SCARG(uap, flags) & ~_MAP_NEW;
	SCARG(&mm, fd) = SCARG(uap, fd);
	SCARG(&mm, addr) = SCARG(uap, addr);
	SCARG(&mm, pos) = SCARG(uap, pos);

	rp = (caddr_t) round_page(p->p_vmspace->vm_daddr + MAXDSIZ);
	if ((SCARG(&mm, flags) & MAP_FIXED) == 0 &&
	    SCARG(&mm, addr) != 0 && SCARG(&mm, addr) < rp)
		SCARG(&mm, addr) = rp;

	return mmap(p, &mm, retval);
}

int
svr4_fchroot(p, uap, retval)
	register struct proc			*p;
	register struct svr4_fchroot_args	*uap;
	register_t				*retval;
{
	struct filedesc	*fdp = p->p_fd;
	struct vnode	*vp;
	struct file	*fp;
	int		 error;

	if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
		return error;
	if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0)
		return error;
	vp = (struct vnode *) fp->f_data;
	VOP_LOCK(vp);
	if (vp->v_type != VDIR)
		error = ENOTDIR;
	else
		error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
	VOP_UNLOCK(vp);
	if (error)
		return error;
	VREF(vp);
	if (fdp->fd_rdir != NULL)
		vrele(fdp->fd_rdir);
	fdp->fd_rdir = vp;
	return 0;
}


int
svr4_mknod(p, uap, retval)
	register struct proc		*p;
	register struct svr4_mknod_args	*uap;
	register_t			*retval;
{
	caddr_t sg = stackgap_init(p->p_emul);
	SVR4_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));

	if (S_ISFIFO(SCARG(uap, mode))) {
		struct mkfifo_args ap;
		SCARG(&ap, path) = SCARG(uap, path);
		SCARG(&ap, mode) = SCARG(uap, mode);
		return mkfifo(p, &ap, retval);
	} else {
		struct mknod_args ap;
		SCARG(&ap, path) = SCARG(uap, path);
		SCARG(&ap, mode) = SCARG(uap, mode);
		SCARG(&ap, dev) = SCARG(uap, dev);
		return mknod(p, &ap, retval);
	}
}

int
svr4_vhangup(p, uap, retval)
	struct proc	*p;
	void		*uap;
	int		*retval;
{
	return 0;
}


int
svr4_sysconfig(p, uap, retval)
	register struct proc			*p;
	register struct svr4_sysconfig_args	*uap;
	register_t				*retval;
{
	extern int	maxfiles;

	switch (SCARG(uap, name)) {
	case SVR4_CONFIG_UNUSED:
		*retval = 0;
		break;
	case SVR4_CONFIG_NGROUPS:
		*retval = NGROUPS_MAX;
		break;
	case SVR4_CONFIG_CHILD_MAX:
		*retval = maxproc;
		break;
	case SVR4_CONFIG_OPEN_FILES:
		*retval = maxfiles;
		break;
	case SVR4_CONFIG_POSIX_VER:
		*retval = 198808;
		break;
	case SVR4_CONFIG_PAGESIZE:
		*retval = NBPG;
		break;
	case SVR4_CONFIG_CLK_TCK:
		*retval = 60;	/* should this be `hz', ie. 100? */
		break;
	case SVR4_CONFIG_XOPEN_VER:
		*retval = 2;	/* XXX: What should that be? */
		break;
	case SVR4_CONFIG_PROF_TCK:
		*retval = 60;	/* XXX: What should that be? */
		break;
	case SVR4_CONFIG_NPROC_CONF:
		*retval = 1;	/* Only one processor for now */
		break;
	case SVR4_CONFIG_NPROC_ONLN:
		*retval = 1;	/* And it better be online */
		break;
	case SVR4_CONFIG_AIO_LISTIO_MAX:
	case SVR4_CONFIG_AIO_MAX:
	case SVR4_CONFIG_AIO_PRIO_DELTA_MAX:
		*retval = 0;	/* No aio support */
		break;
	case SVR4_CONFIG_DELAYTIMER_MAX:
		*retval = 0;	/* No delaytimer support */
		break;
	case SVR4_CONFIG_MQ_OPEN_MAX:
		*retval = msginfo.msgmni;
		break;
	case SVR4_CONFIG_MQ_PRIO_MAX:
		*retval = 0;	/* XXX: Don't know */
		break;
	case SVR4_CONFIG_RTSIG_MAX:
		*retval = 0;
		break;
	case SVR4_CONFIG_SEM_NSEMS_MAX:
		*retval = seminfo.semmni;
		break;
	case SVR4_CONFIG_SEM_VALUE_MAX:
		*retval = seminfo.semvmx;
		break;
	case SVR4_CONFIG_SIGQUEUE_MAX:
		*retval = 0;	/* XXX: Don't know */
		break;
	case SVR4_CONFIG_SIGRT_MIN:
	case SVR4_CONFIG_SIGRT_MAX:
		*retval = 0;	/* No real time signals */
		break;
	case SVR4_CONFIG_TIMER_MAX:
		*retval = 3;	/* XXX: real, virtual, profiling */
		break;
	case SVR4_CONFIG_PHYS_PAGES:
		*retval = cnt.v_free_count;	/* XXX: free instead of total */
		break;
	case SVR4_CONFIG_AVPHYS_PAGES:
		*retval = cnt.v_active_count;	/* XXX: active instead of avg */
		break;
	default:
		return EINVAL;
	}
	return 0;
}

#define SVR4_RLIMIT_NOFILE	5	/* Other RLIMIT_* are the same */
#define SVR4_RLIMIT_VMEM	6	/* Other RLIMIT_* are the same */
#define SVR4_RLIM_NLIMITS	7

int
svr4_getrlimit(p, uap, retval)
	register struct proc			*p;
	register struct svr4_getrlimit_args	*uap;
	register_t				*retval;
{
	struct compat_43_getrlimit_args ap;

	if (SCARG(uap, which) >= SVR4_RLIM_NLIMITS)
		return EINVAL;

	if (SCARG(uap, which) == SVR4_RLIMIT_NOFILE)
		SCARG(uap, which) = RLIMIT_NOFILE;
	if (SCARG(uap, which) == SVR4_RLIMIT_VMEM)
		SCARG(uap, which) = RLIMIT_RSS;

	SCARG(&ap, which) = SCARG(uap, which);
	SCARG(&ap, rlp) = SCARG(uap, rlp);

	return compat_43_getrlimit(p, &ap, retval);
}

int
svr4_setrlimit(p, uap, retval)
	register struct proc			*p;
	register struct svr4_setrlimit_args	*uap;
	register_t				*retval;
{
	struct compat_43_setrlimit_args ap;

	if (SCARG(uap, which) >= SVR4_RLIM_NLIMITS)
		return EINVAL;

	if (SCARG(uap, which) == SVR4_RLIMIT_NOFILE)
		SCARG(uap, which) = RLIMIT_NOFILE;
	if (SCARG(uap, which) == SVR4_RLIMIT_VMEM)
		SCARG(uap, which) = RLIMIT_RSS;

	SCARG(&ap, which) = SCARG(uap, which);
	SCARG(&ap, rlp) = SCARG(uap, rlp);

	return compat_43_setrlimit(p, uap, retval);
}


/* ARGSUSED */
int
svr4_break(p, uap, retval)
	register struct proc		*p;
	register struct svr4_break_args	*uap;
	register_t			*retval;
{
	register struct vmspace *vm = p->p_vmspace;
	vm_offset_t     new, old;
	int             rv;
	register int    diff;

	old = (vm_offset_t) vm->vm_daddr;
	new = round_page(SCARG(uap, nsize));
	diff = new - old;

	DPRINTF(("break(1): old %x new %x diff %x\n", old, new, diff));

	if (diff > p->p_rlimit[RLIMIT_DATA].rlim_cur)
		return ENOMEM;

	old = round_page(old + ctob(vm->vm_dsize));
	DPRINTF(("break(2): dsize = %x ctob %x\n",
		 vm->vm_dsize, ctob(vm->vm_dsize)));

	diff = new - old;
	DPRINTF(("break(3): old %x new %x diff %x\n", old, new, diff));

	if (diff > 0) {
		rv = vm_allocate(&vm->vm_map, &old, diff, FALSE);
		if (rv != KERN_SUCCESS) {
			uprintf("sbrk: grow failed, return = %d\n", rv);
			return ENOMEM;
		}
		vm->vm_dsize += btoc(diff);
	} else if (diff < 0) {
		diff = -diff;
		rv = vm_deallocate(&vm->vm_map, new, diff);
		if (rv != KERN_SUCCESS) {
			uprintf("sbrk: shrink failed, return = %d\n", rv);
			return ENOMEM;
		}
		vm->vm_dsize -= btoc(diff);
	}
	return 0;
}

static __inline clock_t
timeval_to_clock_t(tv)
	struct timeval *tv;
{
	return tv->tv_sec * hz + tv->tv_usec / (1000000 / hz);
}

int
svr4_times(p, uap, retval)
	register struct proc		*p;
	register struct svr4_times_args	*uap;
	register_t			*retval;
{
	int			 error;
	struct tms		 tms;
	struct timeval		 t;
	struct rusage		*ru;
	struct rusage		 r;
	struct getrusage_args 	 ga;

	caddr_t sg = stackgap_init(p->p_emul);
	ru = stackgap_alloc(&sg, sizeof(struct rusage));

	SCARG(&ga, who) = RUSAGE_SELF;
	SCARG(&ga, rusage) = ru;

	error = getrusage(p, &ga, retval);
	if (error)
		return error;

	if (error = copyin(ru, &r, sizeof r))
		return error;

	tms.tms_utime = timeval_to_clock_t(&r.ru_utime);
	tms.tms_stime = timeval_to_clock_t(&r.ru_stime);

	SCARG(&ga, who) = RUSAGE_CHILDREN;
	error = getrusage(p, &ga, retval);
	if (error)
		return error;

	if (error = copyin(ru, &r, sizeof r))
		return error;

	tms.tms_cutime = timeval_to_clock_t(&r.ru_utime);
	tms.tms_cstime = timeval_to_clock_t(&r.ru_stime);

	microtime(&t);
	*retval = timeval_to_clock_t(&t);

	return copyout(&tms, SCARG(uap, tp), sizeof(tms));
}


int
svr4_ulimit(p, uap, retval)
	register struct proc 			*p;
	register struct svr4_ulimit_args	*uap;
	register_t 				*retval;
{
	switch (SCARG(uap, cmd)) {
	case SVR4_GFILLIM:
		*retval = p->p_rlimit[RLIMIT_FSIZE].rlim_cur / 512;
		return 0;

	case SVR4_SFILLIM:
		{
			int error;
			struct setrlimit_args srl;
			struct rlimit krl;
			caddr_t sg = stackgap_init(p->p_emul);
			struct rlimit *url = (struct rlimit *) 
				stackgap_alloc(&sg, sizeof *url);

			krl.rlim_cur = SCARG(uap, newlimit) * 512;
			krl.rlim_max = p->p_rlimit[RLIMIT_FSIZE].rlim_max;

			error = copyout(&krl, url, sizeof(*url));
			if (error)
				return error;

			srl.which = RLIMIT_FSIZE;
			srl.rlp = url;

			error = setrlimit(p, &srl, retval);
			if (error)
				return error;

			*retval = p->p_rlimit[RLIMIT_FSIZE].rlim_cur;
			return 0;
		}

	case SVR4_GMEMLIM:
		{
			struct vmspace *vm = p->p_vmspace;
			*retval = (long) vm->vm_daddr +
				  p->p_rlimit[RLIMIT_DATA].rlim_cur;
			return 0;
		}

	case SVR4_GDESLIM:
		*retval = p->p_rlimit[RLIMIT_NOFILE].rlim_cur;
		return 0;

	default:
		return ENOSYS;
	}
}


static struct proc *
svr4_pfind(pid)
	pid_t pid;
{
	struct proc *p;

	/* look in the live processes */
	if ((p = pfind(pid)) != NULL)
		return p;

	/* look in the zombies */
	for (p = zombproc.lh_first; p != 0; p = p->p_list.le_next)
		if (p->p_pid == pid)
			return p;

	return NULL;
}


int
svr4_pgrpsys(p, uap, retval)
	register struct proc			*p;
	register struct svr4_pgrpsys_args	*uap;
	register_t				*retval;
{
	int error;

	switch (SCARG(uap, cmd)) {
	case 0:			/* getpgrp() */
		*retval = p->p_pgrp->pg_id;
		return 0;

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

			SCARG(&sa, pid) = 0;
			SCARG(&sa, pgid) = 0;
			if ((error = setpgid(p, &sa, retval)) != 0)
				return error;
			*retval = p->p_pgrp->pg_id;
			return 0;
		}

	case 2:			/* getsid(pid) */
		if (SCARG(uap, pid) != 0 &&
		    (p = svr4_pfind(SCARG(uap, pid))) == NULL)
			return ESRCH;
		/* 
		 * we return the pid of the session leader for this
		 * process
		 */
		*retval = (register_t) p->p_session->s_leader->p_pid;
		return 0;

	case 3:			/* setsid() */
		return setsid(p, NULL, retval);

	case 4:			/* getpgid(pid) */

		if (SCARG(uap, pid) != 0 &&
		    (p = svr4_pfind(SCARG(uap, pid))) == NULL)
			return ESRCH;

		*retval = (int) p->p_pgrp->pg_id;
		return 0;

	case 5:			/* setpgid(pid, pgid); */
		{
			struct setpgid_args sa;

			SCARG(&sa, pid) = SCARG(uap, pid);
			SCARG(&sa, pgid) = SCARG(uap, pgid);
			return setpgid(p, &sa, retval);
		}

	default:
		return EINVAL;
	}
}

#define syscallarg(x)   union { x datum; register_t pad; }

struct svr4_hrtcntl_args {
	syscallarg(int) 			cmd;
	syscallarg(int) 			fun;
	syscallarg(int) 			clk;
	syscallarg(svr4_hrt_interval_t *)	iv;
	syscallarg(svr4_hrt_time_t *)		ti;
};

static int
svr4_hrtcntl(p, uap, retval)
	register struct proc			*p;
	register struct svr4_hrtcntl_args	*uap;
	register_t				*retval;
{
	switch (SCARG(uap, fun)) {
	case SVR4_HRT_CNTL_RES:
		DPRINTF(("htrcntl(RES)\n"));
		*retval = SVR4_HRT_USEC;
		return 0;

	case SVR4_HRT_CNTL_TOFD:
		DPRINTF(("htrcntl(TOFD)\n"));
		{
			struct timeval tv;
			svr4_hrt_time_t t;
			if (SCARG(uap, clk) != SVR4_HRT_CLK_STD) {
				DPRINTF(("clk == %d\n", SCARG(uap, clk)));
				return EINVAL;
			}
			if (SCARG(uap, ti) == NULL) {
				DPRINTF(("ti NULL\n"));
				return EINVAL;
			}
			microtime(&tv);
			t.h_sec = tv.tv_sec;
			t.h_rem = tv.tv_usec;
			t.h_res = SVR4_HRT_USEC;
			return copyout(&t, SCARG(uap, ti), sizeof(t));
		}

	case SVR4_HRT_CNTL_START:
		DPRINTF(("htrcntl(START)\n"));
		return ENOSYS;

	case SVR4_HRT_CNTL_GET:
		DPRINTF(("htrcntl(GET)\n"));
		return ENOSYS;
	default:
		DPRINTF(("Bad htrcntl command %d\n", SCARG(uap, fun)));
		return ENOSYS;
	}
}

int
svr4_hrtsys(p, uap, retval) 
	register struct proc			*p;
	register struct svr4_hrtsys_args	*uap;
	register_t				*retval;
{
	int error;
	struct timeval tv;

	switch (SCARG(uap, cmd)) {
	case SVR4_HRT_CNTL:
		return svr4_hrtcntl(p, (struct svr4_hrtcntl_args *) uap,
				    retval);

	case SVR4_HRT_ALRM:
		DPRINTF(("hrtalarm\n"));
		return ENOSYS;

	case SVR4_HRT_SLP:
		DPRINTF(("hrtsleep\n"));
		return ENOSYS;

	case SVR4_HRT_CAN:
		DPRINTF(("hrtcancel\n"));
		return ENOSYS;

	default:
		DPRINTF(("Bad hrtsys command %d\n", SCARG(uap, cmd)));
		return EINVAL;
	}
}

static int
svr4_setinfo(p, st, s)
	struct proc *p;
	int st;
	svr4_siginfo_t *s;
{
	svr4_siginfo_t i;

	bzero(&i, sizeof(i));

	i.si_signo = SVR4_SIGCHLD;
	i.si_errno = 0;	/* XXX? */

	if (p) {
		i.si_pid = p->p_pid;
		i.si_stime = p->p_ru->ru_stime.tv_sec;
		i.si_utime = p->p_ru->ru_utime.tv_sec;
	}

	if (WIFEXITED(st)) {
		i.si_status = WEXITSTATUS(st);
		i.si_code = SVR4_CLD_EXITED;
	}
	else if (WIFSTOPPED(st)) {
		i.si_status = bsd_to_svr4_signum(WSTOPSIG(st));

		if (i.si_status == SVR4_SIGCONT)
			i.si_code = SVR4_CLD_CONTINUED;
		else
			i.si_code = SVR4_CLD_STOPPED;
	} else {
		i.si_status = bsd_to_svr4_signum(WTERMSIG(st));

		if (WCOREDUMP(st))
			i.si_code = SVR4_CLD_DUMPED;
		else
			i.si_code = SVR4_CLD_KILLED;
	}

	DPRINTF(("siginfo [pid %d signo %d code %d errno %d status %d]\n",
		 i.si_pid, i.si_signo, i.si_code, i.si_errno, i.si_status));

	return copyout(&i, s, sizeof(i));
}


int
svr4_waitsys(p, uap, retval) 
	register struct proc			*p;
	register struct svr4_waitsys_args	*uap;
	register_t				*retval;
{
	int nfound;
	int error;
	struct proc *q, *t;


	switch (SCARG(uap, grp)) {
	case SVR4_P_PID:	
		break;

	case SVR4_P_PGID:
		SCARG(uap, id) = -p->p_pgid;
		break;

	case SVR4_P_ALL:
		SCARG(uap, id) = WAIT_ANY;
		break;

	default:
		return EINVAL;
	}

	DPRINTF(("waitsys(%d, %d, %x, %x)\n", 
	         SCARG(uap, grp), SCARG(uap, id), SCARG(uap, info),
	         SCARG(uap, options)));

loop:
	nfound = 0;
	for (q = p->p_children.lh_first; q != 0; q = q->p_sibling.le_next) {
		if (SCARG(uap, id) != WAIT_ANY &&
		    q->p_pid != SCARG(uap, id) &&
		    q->p_pgid != -SCARG(uap, id)) {
			DPRINTF(("pid %d pgid %d != %d\n", q->p_pid,
				 q->p_pgid, SCARG(uap, id)));
			continue;
		}
		nfound++;
		if (q->p_stat == SZOMB && 
		    ((SCARG(uap, options) & (SVR4_WEXITED|SVR4_WTRAPPED)))) {
			*retval = 0;
			DPRINTF(("found %d\n", q->p_pid));
			if ((error = svr4_setinfo(q, q->p_xstat,
						  SCARG(uap, info))) != 0)
				return error;


		        if ((SCARG(uap, options) & SVR4_WNOWAIT)) {
				DPRINTF(("Don't wait\n"));
				return 0;
			}

			/*
			 * If we got the child via a ptrace 'attach',
			 * we need to give it back to the old parent.
			 */
			if (q->p_oppid && (t = pfind(q->p_oppid))) {
				q->p_oppid = 0;
				proc_reparent(q, t);
				psignal(t, SIGCHLD);
				wakeup((caddr_t)t);
				return 0;
			}
			q->p_xstat = 0;
			ruadd(&p->p_stats->p_cru, q->p_ru);
			FREE(q->p_ru, M_ZOMBIE);

			/*
			 * Decrement the count of procs running with this uid.
			 */
			(void)chgproccnt(q->p_cred->p_ruid, -1);

			/*
			 * Free up credentials.
			 */
			if (--q->p_cred->p_refcnt == 0) {
				crfree(q->p_cred->pc_ucred);
				FREE(q->p_cred, M_SUBPROC);
			}

			/*
			 * Release reference to text vnode
			 */
			if (q->p_textvp)
				vrele(q->p_textvp);

			/*
			 * Finally finished with old proc entry.
			 * Unlink it from its process group and free it.
			 */
			leavepgrp(q);
			LIST_REMOVE(q, p_list);	/* off zombproc */
			LIST_REMOVE(q, p_sibling);

			/*
			 * Give machine-dependent layer a chance
			 * to free anything that cpu_exit couldn't
			 * release while still running in process context.
			 */
			cpu_wait(q);
			FREE(q, M_PROC);
			nprocs--;
			return 0;
		}
		if (q->p_stat == SSTOP && (q->p_flag & P_WAITED) == 0 &&
		    (q->p_flag & P_TRACED ||
		     (SCARG(uap, options) & (SVR4_WSTOPPED|SVR4_WCONTINUED)))) {
			DPRINTF(("jobcontrol %d\n", q->p_pid));
		        if (((SCARG(uap, options) & SVR4_WNOWAIT)) == 0)
				q->p_flag |= P_WAITED;
			else
				DPRINTF(("Don't wait\n"));
			*retval = 0;
			return svr4_setinfo(q, W_STOPCODE(q->p_xstat),
					    SCARG(uap, info));
		}
	}

	if (nfound == 0)
		return ECHILD;

	if (SCARG(uap, options) & SVR4_WNOHANG) {
		*retval = 0;
		if ((error = svr4_setinfo(NULL, 0, SCARG(uap, info))) != 0)
			return error;
		return 0;
	}

	if (error = tsleep((caddr_t)p, PWAIT | PCATCH, "svr4_wait", 0))
		return error;
	goto loop;
}


static void
bsd_statfs_to_svr4_statvfs(bfs, sfs)
	const struct statfs *bfs;
	struct svr4_statvfs *sfs;
{
	sfs->f_bsize = bfs->f_bsize;
	sfs->f_frsize = bfs->f_bsize / 8; /* XXX */
	sfs->f_blocks = bfs->f_blocks;
	sfs->f_bfree = bfs->f_bfree;
	sfs->f_bavail = bfs->f_bavail;
	sfs->f_files = bfs->f_files;
	sfs->f_ffree = bfs->f_ffree;
	sfs->f_favail = bfs->f_ffree;
	sfs->f_fsid = bfs->f_fsid.val[0];
	bcopy(bfs->f_fstypename, sfs->f_basetype, sizeof(sfs->f_basetype));
	sfs->f_flag = 0;
	if (bfs->f_flags & MNT_RDONLY)
		sfs->f_flag |= SVR4_ST_RDONLY;
	if (bfs->f_flags & MNT_NOSUID)
		sfs->f_flag |= SVR4_ST_NOSUID;
	sfs->f_namemax = MAXNAMLEN;
	bcopy(bfs->f_fstypename, sfs->f_fstr, sizeof(sfs->f_fstr)); /* XXX */
	bzero(sfs->f_filler, sizeof(sfs->f_filler));
}


int
svr4_statvfs(p, uap, retval) 
	register struct proc			*p;
	register struct svr4_statvfs_args	*uap;
	register_t				*retval;
{
	struct statfs_args	fs_args;
	caddr_t sg = stackgap_init(p->p_emul);
	struct statfs *fs = stackgap_alloc(&sg, sizeof(struct statfs));
	struct statfs bfs;
	struct svr4_statvfs sfs;
	int error;

	SVR4_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
	SCARG(&fs_args, path) = SCARG(uap, path);
	SCARG(&fs_args, buf) = fs;

	if ((error = statfs(p, &fs_args, retval)) != 0)
		return error;

	if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
		return error;

	bsd_statfs_to_svr4_statvfs(&bfs, &sfs);

	return copyout(&sfs, SCARG(uap, fs), sizeof(sfs));
}


int
svr4_fstatvfs(p, uap, retval) 
	register struct proc			*p;
	register struct svr4_fstatvfs_args	*uap;
	register_t				*retval;
{
	struct fstatfs_args	fs_args;
	caddr_t sg = stackgap_init(p->p_emul);
	struct statfs *fs = stackgap_alloc(&sg, sizeof(struct statfs));
	struct statfs bfs;
	struct svr4_statvfs sfs;
	int error;

	SCARG(&fs_args, fd) = SCARG(uap, fd);
	SCARG(&fs_args, buf) = fs;

	if ((error = fstatfs(p, &fs_args, retval)) != 0)
		return error;

	if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
		return error;

	bsd_statfs_to_svr4_statvfs(&bfs, &sfs);

	return copyout(&sfs, SCARG(uap, fs), sizeof(sfs));
}

int
svr4_alarm(p, uap, retval)
	register struct proc 		*p;
	register struct svr4_alarm_args	*uap;
	register_t			*retval;
{
	int error;
        struct itimerval *ntp, *otp, tp;
	struct setitimer_args sa;
	caddr_t sg = stackgap_init(p->p_emul);

        ntp = stackgap_alloc(&sg, sizeof(struct itimerval));
        otp = stackgap_alloc(&sg, sizeof(struct itimerval));

        timerclear(&tp.it_interval);
        tp.it_value.tv_sec = SCARG(uap, sec);
        tp.it_value.tv_usec = 0;

	if ((error = copyout(&tp, ntp, sizeof(tp))) != 0)
		return error;

	SCARG(&sa, which) = ITIMER_REAL;
	SCARG(&sa, itv) = ntp;
	SCARG(&sa, oitv) = otp;

        if ((error = setitimer(p, &sa, retval)) != 0)
		return error;

	if ((error = copyin(otp, &tp, sizeof(tp))) != 0)
		return error;

        if (tp.it_value.tv_usec)
                tp.it_value.tv_sec++;

        *retval = (register_t) tp.it_value.tv_sec;

        return 0;
}


int
svr4_gettimeofday(p, uap, retval)
	register struct proc 			*p;
	register struct svr4_gettimeofday_args	*uap;
	register_t				*retval;
{
	if (SCARG(uap, tp)) {
		struct timeval atv;

		microtime(&atv);
		return copyout(&atv, SCARG(uap, tp), sizeof (atv));
	}

	return 0;
}