/*      $NetBSD: sunos_misc.c,v 1.177 2021/09/07 11:43:05 riastradh Exp $       */

/*
 * 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. 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.
 *
 *      @(#)sunos_misc.c        8.1 (Berkeley) 6/18/93
 *
 *      Header: sunos_misc.c,v 1.16 93/04/07 02:46:27 torek Exp
 */

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

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sunos_misc.c,v 1.177 2021/09/07 11:43:05 riastradh Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/dirent.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/reboot.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/ptrace.h>
#include <sys/resource.h>
#include <sys/resourcevar.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <sys/socket.h>
#include <sys/tty.h>
#include <sys/vnode.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <sys/utsname.h>
#include <sys/unistd.h>
#include <sys/syscall.h>
#include <sys/syscallargs.h>
#include <sys/conf.h>
#include <sys/socketvar.h>
#include <sys/exec.h>
#include <sys/swap.h>
#include <sys/kauth.h>

#include <compat/sys/signal.h>

#include <compat/sunos/sunos.h>
#include <compat/sunos/sunos_syscallargs.h>
#include <compat/common/compat_util.h>
#include <compat/sunos/sunos_dirent.h>
#include <compat/sys/mount.h>

#include <netinet/in.h>

#include <miscfs/specfs/specdev.h>

#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nfsmount.h>

static int sunstatfs(struct statvfs *, void *);

int
sunos_sys_stime(struct lwp *l, const struct sunos_sys_stime_args *uap, register_t *retval)
{
        struct timeval tv;
        int error;

        error = copyin(SCARG(uap, tp), &tv.tv_sec, sizeof(tv.tv_sec));
        if (error)
                return error;
        tv.tv_usec = 0;

        return settimeofday1(&tv, false, NULL, l, true);
}

int
sunos_sys_wait4(struct lwp *l, const struct sunos_sys_wait4_args *uap, register_t *retval)
{
        struct compat_50_sys_wait4_args bsd_ua;

        SCARG(&bsd_ua, pid) = SCARG(uap, pid) == 0 ? WAIT_ANY : SCARG(uap, pid);
        SCARG(&bsd_ua, status) = SCARG(uap, status);
        SCARG(&bsd_ua, options) = SCARG(uap, options);
        SCARG(&bsd_ua, rusage) = SCARG(uap, rusage);

        return (compat_50_sys_wait4(l, &bsd_ua, retval));
}

int
sunos_sys_creat(struct lwp *l, const struct sunos_sys_creat_args *uap, register_t *retval)
{
        struct sys_open_args ouap;

        SCARG(&ouap, path) = SCARG(uap, path);
        SCARG(&ouap, flags) = O_WRONLY | O_CREAT | O_TRUNC;
        SCARG(&ouap, mode) = SCARG(uap, mode);

        return (sys_open(l, &ouap, retval));
}

int
sunos_sys_execv(struct lwp *l, const struct sunos_sys_execv_args *uap, register_t *retval)
{
        /* {
                syscallarg(const char *) path;
                syscallarg(char **) argv;
        } */
        struct sys_execve_args ap;

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

        return (sys_execve(l, &ap, retval));
}

int
sunos_sys_execve(struct lwp *l, const struct sunos_sys_execve_args *uap, register_t *retval)
{
        /* {
                syscallarg(const char *) path;
                syscallarg(char **) argv;
                syscallarg(char **) envp;
        } */
        struct sys_execve_args ap;

        SCARG(&ap, path) = SCARG(uap, path);
        SCARG(&ap, argp) = SCARG(uap, argp);
        SCARG(&ap, envp) = SCARG(uap, envp);

        return (sys_execve(l, &ap, retval));
}

int
sunos_sys_omsync(struct lwp *l, const struct sunos_sys_omsync_args *uap, register_t *retval)
{
        struct sys___msync13_args ouap;

        SCARG(&ouap, addr) = SCARG(uap, addr);
        SCARG(&ouap, len) = SCARG(uap, len);
        SCARG(&ouap, flags) = SCARG(uap, flags);

        return (sys___msync13(l, &ouap, retval));
}

int
sunos_sys_unmount(struct lwp *l, const struct sunos_sys_unmount_args *uap, register_t *retval)
{
        struct sys_unmount_args ouap;

        SCARG(&ouap, path) = SCARG(uap, path);
        SCARG(&ouap, flags) = 0;

        return (sys_unmount(l, &ouap, retval));
}

/*
 * Conversion table for SunOS NFS mount flags.
 */
static struct {
        int     sun_flg;
        int     bsd_flg;
} sunnfs_flgtab[] = {
        { SUNNFS_SOFT,          NFSMNT_SOFT },
        { SUNNFS_WSIZE,         NFSMNT_WSIZE },
        { SUNNFS_RSIZE,         NFSMNT_RSIZE },
        { SUNNFS_TIMEO,         NFSMNT_TIMEO },
        { SUNNFS_RETRANS,       NFSMNT_RETRANS },
        { SUNNFS_HOSTNAME,      0 },                    /* Ignored */
        { SUNNFS_INT,           NFSMNT_INT },
        { SUNNFS_NOAC,          0 },                    /* Ignored */
        { SUNNFS_ACREGMIN,      0 },                    /* Ignored */
        { SUNNFS_ACREGMAX,      0 },                    /* Ignored */
        { SUNNFS_ACDIRMIN,      0 },                    /* Ignored */
        { SUNNFS_ACDIRMAX,      0 },                    /* Ignored */
        { SUNNFS_SECURE,        0 },                    /* Ignored */
        { SUNNFS_NOCTO,         0 },                    /* Ignored */
        { SUNNFS_POSIX,         0 }                     /* Ignored */
};

int
sunos_sys_mount(struct lwp *l, const struct sunos_sys_mount_args *uap, register_t *retval)
{
        int oflags = SCARG(uap, flags), nflags, error;
        char fsname[MFSNAMELEN];
        register_t dummy;

        if (oflags & (SUNM_NOSUB | SUNM_SYS5))
                return (EINVAL);
        if ((oflags & SUNM_NEWTYPE) == 0)
                return (EINVAL);
        nflags = 0;
        if (oflags & SUNM_RDONLY)
                nflags |= MNT_RDONLY;
        if (oflags & SUNM_NOSUID)
                nflags |= MNT_NOSUID;
        if (oflags & SUNM_REMOUNT)
                nflags |= MNT_UPDATE;

        error = copyinstr(SCARG(uap, type), fsname, sizeof fsname, NULL);
        if (error)
                return (error);

        if (strcmp(fsname, "nfs") == 0) {
                struct sunos_nfs_args sna;
                struct nfs_args na;
                int n;

                error = copyin(SCARG(uap, data), &sna, sizeof sna);
                if (error)
                        return (error);
                /* sa.sa_len = sizeof(sain); */
                na.version = NFS_ARGSVERSION;
                na.addr = (void *)sna.addr;
                na.addrlen = sizeof(struct sockaddr);
                na.sotype = SOCK_DGRAM;
                na.proto = IPPROTO_UDP;
                na.fh = sna.fh;
                na.fhsize = NFSX_V2FH;
                na.flags = 0;
                n = sizeof(sunnfs_flgtab) / sizeof(sunnfs_flgtab[0]);
                while (--n >= 0)
                        if (sna.flags & sunnfs_flgtab[n].sun_flg)
                                na.flags |= sunnfs_flgtab[n].bsd_flg;
                na.wsize = sna.wsize;
                na.rsize = sna.rsize;
                if (na.flags & NFSMNT_RSIZE) {
                        na.flags |= NFSMNT_READDIRSIZE;
                        na.readdirsize = na.rsize;
                }
                na.timeo = sna.timeo;
                na.retrans = sna.retrans;
#ifdef __arch64__
                /* XXX */
                na.hostname = (char *)(intptr_t)sna.hostname;
#else
                na.hostname = sna.hostname;
#endif
                return do_sys_mount(l, "nfs", UIO_SYSSPACE,
                    SCARG(uap, dir), nflags, &na,
                    UIO_SYSSPACE, sizeof na, &dummy);
        }

        if (strcmp(fsname, "4.2") == 0)
                strcpy(fsname, "ffs");

        return do_sys_mount(l, fsname, UIO_SYSSPACE,
            SCARG(uap, dir), nflags, SCARG(uap, data),
            UIO_USERSPACE, 0, &dummy);
}

int
async_daemon(struct lwp *l, const void *v, register_t *retval)
{

        return kpause("fakeniod", false, 0, NULL);
}

void    native_to_sunos_sigset(const sigset_t *, int *);
void    sunos_to_native_sigset(const int, sigset_t *);

inline void
native_to_sunos_sigset(const sigset_t *ss, int *mask)
{

        *mask = ss->__bits[0];
}

inline void
sunos_to_native_sigset(const int mask, sigset_t *ss)
{

        memset(ss, 0, sizeof(*ss));
        ss->__bits[0] = mask;
        ss->__bits[1] = 0;
        ss->__bits[2] = 0;
        ss->__bits[3] = 0;
}

int
sunos_sys_sigpending(struct lwp *l, const struct sunos_sys_sigpending_args *uap, register_t *retval)
{
        sigset_t ss;
        int mask;

        sigpending1(l, &ss);
        native_to_sunos_sigset(&ss, &mask);

        return (copyout((void *)&mask, (void *)SCARG(uap, mask), sizeof(int)));
}

int
sunos_sys_sigsuspend(struct lwp *l, const struct sunos_sys_sigsuspend_args *uap, register_t *retval)
{
        /* {
                syscallarg(int) mask;
        } */
        int mask;
        sigset_t ss;

        mask = SCARG(uap, mask);
        sunos_to_native_sigset(mask, &ss);
        return (sigsuspend1(l, &ss));
}

/*
 * Read Sun-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
sunos_sys_getdents(struct lwp *l, const struct sunos_sys_getdents_args *uap, register_t *retval)
{
        struct dirent *bdp;
        struct vnode *vp;
        char *inp, *buf;        /* BSD-format */
        int len, reclen;        /* BSD-format */
        char *outp;             /* Sun-format */
        int resid, sunos_reclen;/* Sun-format */
        struct file *fp;
        struct uio auio;
        struct iovec aiov;
        struct sunos_dirent idb;
        off_t off;                      /* true file offset */
        int buflen, error, eofflag;
        off_t *cookiebuf, *cookie;
        int ncookies;

        if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0)
                return (error);

        if ((fp->f_flag & FREAD) == 0) {
                error = EBADF;
                goto out1;
        }

        vp = fp->f_vnode;
        if (vp->v_type != VDIR) {
                error = EINVAL;
                goto out1;
        }

        buflen = uimin(MAXBSIZE, SCARG(uap, nbytes));
        buf = malloc(buflen, M_TEMP, M_WAITOK);
        vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
        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_resid = buflen;
        auio.uio_offset = off;
        UIO_SETUP_SYSSPACE(&auio);
        /*
         * 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, &cookiebuf,
            &ncookies);
        if (error)
                goto out;

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

        for (cookie = cookiebuf; len > 0; len -= reclen) {
                bdp = (struct dirent *)inp;
                reclen = bdp->d_reclen;
                if (reclen & 3) {
                        error = EIO;
                        goto out;
                }
                if ((*cookie >> 32) != 0) {
                        compat_offseterr(vp, "sunos_getdents");
                        error = EINVAL;
                        goto out;
                }
                if (bdp->d_fileno == 0) {
                        inp += reclen;  /* it is a hole; squish it out */
                        if (cookie)
                                off = *cookie++;
                        else
                                off += reclen;
                        continue;
                }
                memset(&idb, 0, sizeof(idb));
                sunos_reclen = SUNOS_RECLEN(&idb, bdp->d_namlen);
                if (reclen > len || resid < sunos_reclen) {
                        /* entry too big for buffer, so just stop */
                        outp++;
                        break;
                }
                if (cookie)
                        off = *cookie++;        /* each entry points to next */
                else
                        off += reclen;
                /*
                 * Massage in place to make a Sun-shaped dirent (otherwise
                 * we have to worry about touching user memory outside of
                 * the copyout() call).
                 */
                idb.d_fileno = bdp->d_fileno;
                idb.d_off = off;
                idb.d_reclen = sunos_reclen;
                idb.d_namlen = bdp->d_namlen;
                strlcpy(idb.d_name, bdp->d_name, sizeof(idb.d_name));
                if ((error = copyout((void *)&idb, outp, sunos_reclen)) != 0)
                        goto out;
                /* advance past this real entry */
                inp += reclen;
                /* advance output past Sun-shaped entry */
                outp += sunos_reclen;
                resid -= sunos_reclen;
        }

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

eof:
        *retval = SCARG(uap, nbytes) - resid;
out:
        VOP_UNLOCK(vp);
        free(cookiebuf, M_TEMP);
        free(buf, M_TEMP);
 out1:
        fd_putfile(SCARG(uap, fd));
        return (error);
}

#define SUNOS__MAP_NEW  0x80000000      /* if not, old mmap & cannot handle */

int
sunos_sys_mmap(struct lwp *l, const struct sunos_sys_mmap_args *uap, register_t *retval)
{
        struct sys_mmap_args ouap;

        /*
         * Verify the arguments.
         */
        if (SCARG(uap, prot) & ~(PROT_READ|PROT_WRITE|PROT_EXEC))
                return (EINVAL);                        /* XXX still needed? */

        if ((SCARG(uap, flags) & SUNOS__MAP_NEW) == 0)
                return (EINVAL);

        SCARG(&ouap, flags) = SCARG(uap, flags) & ~SUNOS__MAP_NEW;
        SCARG(&ouap, addr) = SCARG(uap, addr);
        SCARG(&ouap, len) = SCARG(uap, len);
        SCARG(&ouap, prot) = SCARG(uap, prot);
        SCARG(&ouap, fd) = SCARG(uap, fd);
        SCARG(&ouap, pos) = SCARG(uap, pos);

        return (sys_mmap(l, &ouap, retval));
}

#define MC_SYNC         1
#define MC_LOCK         2
#define MC_UNLOCK       3
#define MC_ADVISE       4
#define MC_LOCKAS       5
#define MC_UNLOCKAS     6

int
sunos_sys_mctl(struct lwp *l, const struct sunos_sys_mctl_args *uap, register_t *retval)
{

        switch (SCARG(uap, func)) {
        case MC_ADVISE:         /* ignore for now */
                return (0);
        case MC_SYNC:           /* translate to msync */
                return (sys___msync13(l, (const void *)uap, retval));
        default:
                return (EINVAL);
        }
}

int
sunos_sys_setsockopt(struct lwp *l, const struct sunos_sys_setsockopt_args *uap, register_t *retval)
{
        struct sockopt sopt;
        struct socket *so;
        int name = SCARG(uap, name);
        int error;

        /* fd_getsock() will use the descriptor for us */
        if ((error = fd_getsock(SCARG(uap, s), &so)) != 0)
                return (error);
#define SO_DONTLINGER (~SO_LINGER)
        if (name == SO_DONTLINGER) {
                struct linger lg;

                lg.l_onoff = 0;
                error = so_setsockopt(l, so, SCARG(uap, level), SO_LINGER,
                    &lg, sizeof(lg));
                goto out;
        }
        if (SCARG(uap, level) == IPPROTO_IP) {
#define         SUNOS_IP_MULTICAST_IF           2
#define         SUNOS_IP_MULTICAST_TTL          3
#define         SUNOS_IP_MULTICAST_LOOP         4
#define         SUNOS_IP_ADD_MEMBERSHIP         5
#define         SUNOS_IP_DROP_MEMBERSHIP        6
                static const int ipoptxlat[] = {
                        IP_MULTICAST_IF,
                        IP_MULTICAST_TTL,
                        IP_MULTICAST_LOOP,
                        IP_ADD_MEMBERSHIP,
                        IP_DROP_MEMBERSHIP
                };
                if (name >= SUNOS_IP_MULTICAST_IF &&
                    name <= SUNOS_IP_DROP_MEMBERSHIP) {
                        name = ipoptxlat[name - SUNOS_IP_MULTICAST_IF];
                }
        }
        if ((unsigned)SCARG(uap, valsize) > MLEN) {
                error = EINVAL;
                goto out;
        }
        sockopt_init(&sopt, SCARG(uap, level), name, SCARG(uap, valsize));
        if (SCARG(uap, val)) {
                error = copyin(SCARG(uap, val), sopt.sopt_data,
                    (u_int)SCARG(uap, valsize));
        }
        if (error == 0)
                error = sosetopt(so, &sopt);
        sockopt_destroy(&sopt);
 out:
        fd_putfile(SCARG(uap, s));
        return (error);
}

static inline int sunos_sys_socket_common(struct lwp *, register_t *,
                                              int type);
static inline int
sunos_sys_socket_common(struct lwp *l, register_t *retval, int type)
{
        struct socket *so;
        int error, fd;

        /* fd_getsock() will use the descriptor for us */
        fd = (int)*retval;
        if ((error = fd_getsock(fd, &so)) == 0) {
                if (type == SOCK_DGRAM)
                        so->so_options |= SO_BROADCAST;
                fd_putfile(fd);
        }
        return (error);
}

int
sunos_sys_socket(struct lwp *l, const struct sunos_sys_socket_args *uap, register_t *retval)
{
        /* {
                syscallarg(int) domain;
                syscallarg(int) type;
                syscallarg(int) protocol;
        } */
        int error;

        error = compat_30_sys_socket(l, (const void *)uap, retval);
        if (error)
                return (error);
        return sunos_sys_socket_common(l, retval, SCARG(uap, type));
}

int
sunos_sys_socketpair(struct lwp *l, const struct sunos_sys_socketpair_args *uap, register_t *retval)
{
        /* {
                syscallarg(int) domain;
                syscallarg(int) type;
                syscallarg(int) protocol;
                syscallarg(int *) rsv;
        } */
        int error;

        error = sys_socketpair(l, (const void *)uap, retval);
        if (error)
                return (error);
        return sunos_sys_socket_common(l, retval, SCARG(uap, type));
}

/*
 * XXX: This needs cleaning up.
 */
int
sunos_sys_auditsys(struct lwp *l, const struct sunos_sys_auditsys_args *uap, register_t *retval)
{
        return 0;
}

int
sunos_sys_uname(struct lwp *l, const struct sunos_sys_uname_args *uap, register_t *retval)
{
        struct sunos_utsname sut;

        memset(&sut, 0, sizeof(sut));

        strlcpy(sut.sysname, ostype, sizeof(sut.sysname));
        strlcpy(sut.nodename, hostname, sizeof(sut.nodename));
        strlcpy(sut.release, osrelease, sizeof(sut.release));
        strlcpy(sut.version, "1", sizeof(sut.version));
        strlcpy(sut.machine, machine, sizeof(sut.machine));

        return copyout(&sut, SCARG(uap, name), sizeof(sut));
}

int
sunos_sys_setpgrp(struct lwp *l, const struct sunos_sys_setpgrp_args *uap, register_t *retval)
{
        struct proc *p = l->l_proc;

        /*
         * difference to our setpgid call is to include backwards
         * compatibility to pre-setsid() binaries. Do setsid()
         * instead of setpgid() in those cases where the process
         * tries to create a new session the old way.
         */
        if (!SCARG(uap, pgid) &&
            (!SCARG(uap, pid) || SCARG(uap, pid) == p->p_pid))
                return sys_setsid(l, NULL, retval);
        else
                return sys_setpgid(l, (const void *)uap, retval);
}

int
sunos_sys_open(struct lwp *l, const struct sunos_sys_open_args *uap, register_t *retval)
{
        struct proc *p = l->l_proc;
        struct sys_open_args open_ua;
        int smode, nmode;
        int noctty;
        int ret;

        /* convert mode into NetBSD mode */
        smode = SCARG(uap, flags);
        noctty = smode & 0x8000;
        nmode = smode &
                (0x0001 | 0x0002 | 0x0008 | 0x0040 | 0x0200 | 0x0400 | 0x0800);
        nmode |= ((smode & (0x0004 | 0x1000 | 0x4000)) ? O_NONBLOCK : 0);
        nmode |= ((smode & 0x0080) ? O_SHLOCK : 0);
        nmode |= ((smode & 0x0100) ? O_EXLOCK : 0);
        nmode |= ((smode & 0x2000) ? O_FSYNC : 0);

        SCARG(&open_ua, path) = SCARG(uap, path);
        SCARG(&open_ua, flags) = nmode;
        SCARG(&open_ua, mode) = SCARG(uap, mode);
        ret = sys_open(l, &open_ua, retval);

        /* XXXSMP */
        if (!ret && !noctty && SESS_LEADER(p) && !(p->p_lflag & PL_CONTROLT)) {
                file_t *fp;
                int fd;

                fd = (int)*retval;
                fp = fd_getfile(fd);

                /* ignore any error, just give it a try */
                if (fp != NULL) {
                        if (fp->f_type == DTYPE_VNODE)
                                (fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, NULL);
                        fd_putfile(fd);
                }
        }
        return ret;
}

int
sunos_sys_ustat(struct lwp *l, const struct sunos_sys_ustat_args *uap, register_t *retval)
{
        struct sunos_ustat us;
        int error;

        memset(&us, 0, sizeof us);

        /*
         * XXX: should set f_tfree and f_tinode at least
         * How do we translate dev -> fstat? (and then to sunos_ustat)
         */

        if ((error = copyout(&us, SCARG(uap, buf), sizeof us)) != 0)
                return (error);
        return 0;
}

int
sunos_sys_quotactl(struct lwp *l, const struct sunos_sys_quotactl_args *uap, register_t *retval)
{

        return EINVAL;
}

int
sunos_sys_vhangup(struct lwp *l, const void *v, register_t *retval)
{
        struct proc *p = l->l_proc;
        struct session *sp = p->p_session;

        if (sp->s_ttyvp == 0)
                return 0;

        if (sp->s_ttyp && sp->s_ttyp->t_session == sp && sp->s_ttyp->t_pgrp)
                pgsignal(sp->s_ttyp->t_pgrp, SIGHUP, 1);

        (void) ttywait(sp->s_ttyp);
        if (sp->s_ttyvp)
                VOP_REVOKE(sp->s_ttyvp, REVOKEALL);
        if (sp->s_ttyvp)
                vrele(sp->s_ttyvp);
        sp->s_ttyvp = NULL;

        return 0;
}

static int
sunstatfs(struct statvfs *sp, void *buf)
{
        struct sunos_statfs ssfs;

        memset(&ssfs, 0, sizeof ssfs);
        ssfs.f_type = 0;
        ssfs.f_bsize = sp->f_bsize;
        ssfs.f_blocks = sp->f_blocks;
        ssfs.f_bfree = sp->f_bfree;
        ssfs.f_bavail = sp->f_bavail;
        ssfs.f_files = sp->f_files;
        ssfs.f_ffree = sp->f_ffree;
        ssfs.f_fsid = sp->f_fsidx;
        return copyout((void *)&ssfs, buf, sizeof ssfs);
}

int
sunos_sys_statfs(struct lwp *l, const struct sunos_sys_statfs_args *uap, register_t *retval)
{
        struct mount *mp;
        struct statvfs *sp;
        int error;
        struct vnode *vp;

        error = namei_simple_user(SCARG(uap, path),
                                NSM_FOLLOW_TRYEMULROOT, &vp);
        if (error != 0)
                return (error);
        mp = vp->v_mount;
        sp = &mp->mnt_stat;
        vrele(vp);
        if ((error = VFS_STATVFS(mp, sp)) != 0)
                return (error);
        sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK;
        return sunstatfs(sp, (void *)SCARG(uap, buf));
}

int
sunos_sys_fstatfs(struct lwp *l, const struct sunos_sys_fstatfs_args *uap, register_t *retval)
{
        file_t *fp;
        struct mount *mp;
        struct statvfs *sp;
        int error;

        /* fd_getvnode() will use the descriptor for us */
        if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0)
                return (error);
        mp = fp->f_vnode->v_mount;
        sp = &mp->mnt_stat;
        if ((error = VFS_STATVFS(mp, sp)) != 0)
                goto out;
        sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK;
        error = sunstatfs(sp, (void *)SCARG(uap, buf));
 out:
        fd_putfile(SCARG(uap, fd));
        return (error);
}

int
sunos_sys_exportfs(struct lwp *l, const struct sunos_sys_exportfs_args *uap, register_t *retval)
{
        /*
         * XXX: should perhaps translate into a mount(2)
         * with MOUNT_EXPORT?
         */
        return 0;
}

int
sunos_sys_mknod(struct lwp *l, const struct sunos_sys_mknod_args *uap, register_t *retval)
{
        struct sys_mkfifo_args fifo_ua;

        if (S_ISFIFO(SCARG(uap, mode))) {
                SCARG(&fifo_ua, path) = SCARG(uap, path);
                SCARG(&fifo_ua, mode) = SCARG(uap, mode);
                return sys_mkfifo(l, &fifo_ua, retval);
        }

        return compat_50_sys_mknod(l,
            (const struct compat_50_sys_mknod_args *)uap, retval);
}

#define SUNOS_SC_ARG_MAX        1
#define SUNOS_SC_CHILD_MAX      2
#define SUNOS_SC_CLK_TCK        3
#define SUNOS_SC_NGROUPS_MAX    4
#define SUNOS_SC_OPEN_MAX       5
#define SUNOS_SC_JOB_CONTROL    6
#define SUNOS_SC_SAVED_IDS      7
#define SUNOS_SC_VERSION        8

int
sunos_sys_sysconf(struct lwp *l, const struct sunos_sys_sysconf_args *uap, register_t *retval)
{

        switch(SCARG(uap, name)) {
        case SUNOS_SC_ARG_MAX:
                *retval = ARG_MAX;
                break;
        case SUNOS_SC_CHILD_MAX:
                *retval = maxproc;
                break;
        case SUNOS_SC_CLK_TCK:
                *retval = 60;           /* should this be `hz', ie. 100? */
                break;
        case SUNOS_SC_NGROUPS_MAX:
                *retval = NGROUPS_MAX;
                break;
        case SUNOS_SC_OPEN_MAX:
                *retval = maxfiles;
                break;
        case SUNOS_SC_JOB_CONTROL:
                *retval = 1;
                break;
        case SUNOS_SC_SAVED_IDS:
#ifdef _POSIX_SAVED_IDS
                *retval = 1;
#else
                *retval = 0;
#endif
                break;
        case SUNOS_SC_VERSION:
                *retval = 198808;
                break;
        default:
                return EINVAL;
        }
        return 0;
}

#define SUNOS_RLIMIT_NOFILE     6       /* Other RLIMIT_* are the same */
#define SUNOS_RLIM_NLIMITS      7

int
sunos_sys_getrlimit(struct lwp *l, const struct sunos_sys_getrlimit_args *uap, register_t *retval)
{
        struct compat_43_sys_getrlimit_args ua_43;

        SCARG(&ua_43, which) = SCARG(uap, which);
        SCARG(&ua_43, rlp) = SCARG(uap, rlp);

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

        if (SCARG(uap, which) == SUNOS_RLIMIT_NOFILE)
                SCARG(&ua_43, which) = RLIMIT_NOFILE;

        return compat_43_sys_getrlimit(l, &ua_43, retval);
}

int
sunos_sys_setrlimit(struct lwp *l, const struct sunos_sys_setrlimit_args *uap, register_t *retval)
{
        struct compat_43_sys_setrlimit_args ua_43;

        SCARG(&ua_43, which) = SCARG(uap, which);
        SCARG(&ua_43, rlp) = SCARG(uap, rlp);

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

        if (SCARG(uap, which) == SUNOS_RLIMIT_NOFILE)
                SCARG(&ua_43, which) = RLIMIT_NOFILE;

        return compat_43_sys_setrlimit(l, &ua_43, retval);
}

/* for the m68k machines */
#ifndef PT_GETFPREGS
#define PT_GETFPREGS -1
#endif
#ifndef PT_SETFPREGS
#define PT_SETFPREGS -1
#endif

static const int sreq2breq[] = {
        PT_TRACE_ME,    PT_READ_I,      PT_READ_D,      -1,
        PT_WRITE_I,     PT_WRITE_D,     -1,             PT_CONTINUE,
        PT_KILL,        -1,             PT_ATTACH,      PT_DETACH,
        PT_GETREGS,     PT_SETREGS,     PT_GETFPREGS,   PT_SETFPREGS
};
static const int nreqs = sizeof(sreq2breq) / sizeof(sreq2breq[0]);

int
sunos_sys_ptrace(struct lwp *l, const struct sunos_sys_ptrace_args *uap, register_t *retval)
{
        struct sys_ptrace_args pa;
        int req;

#define sys_ptrace sysent[SYS_ptrace].sy_call 
        if (sys_ptrace == sys_nosys)
                return ENOSYS;

        req = SCARG(uap, req);

        if (req < 0 || req >= nreqs)
                return (EINVAL);

        req = sreq2breq[req];
        if (req == -1)
                return (EINVAL);

        SCARG(&pa, req) = req;
        SCARG(&pa, pid) = (pid_t)SCARG(uap, pid);
        SCARG(&pa, addr) = (void *)SCARG(uap, addr);
        SCARG(&pa, data) = SCARG(uap, data);

        return sys_ptrace(l, &pa, retval);
}

/*
 * SunOS reboot system call (for compatibility).
 * Sun lets you pass in a boot string which the PROM
 * saves and provides to the next boot program.
 */

#define SUNOS_RB_ASKNAME        0x001
#define SUNOS_RB_SINGLE         0x002
#define SUNOS_RB_NOSYNC         0x004
#define SUNOS_RB_HALT           0x008
#define SUNOS_RB_DUMP           0x080
#define SUNOS_RB_STRING         0x200

static struct sunos_howto_conv {
        int sun_howto;
        int bsd_howto;
} sunos_howto_conv[] = {
        { SUNOS_RB_ASKNAME,     RB_ASKNAME },
        { SUNOS_RB_SINGLE,      RB_SINGLE },
        { SUNOS_RB_NOSYNC,      RB_NOSYNC },
        { SUNOS_RB_HALT,        RB_HALT },
        { SUNOS_RB_DUMP,        RB_DUMP },
        { SUNOS_RB_STRING,      RB_STRING },
        { 0x000,                0 },
};

int
sunos_sys_reboot(struct lwp *l, const struct sunos_sys_reboot_args *uap, register_t *retval)
{
        struct sys_reboot_args ua;
        struct sunos_howto_conv *convp;
        int error, bsd_howto, sun_howto;
        char *bootstr;
        char bs[128];

        if ((error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_REBOOT,
            0, NULL, NULL, NULL)) != 0)
                return (error);

        /*
         * Convert howto bits to BSD format.
         */
        sun_howto = SCARG(uap, howto);
        bsd_howto = 0;
        convp = sunos_howto_conv;
        while (convp->sun_howto) {
                if (sun_howto & convp->sun_howto)
                        bsd_howto |= convp->bsd_howto;
                convp++;
        }

        /*
         * Sun RB_STRING (Get user supplied bootstring.)
         * If the machine supports passing a string to the
         * next booted kernel.
         */
        if (sun_howto & SUNOS_RB_STRING) {
                error = copyinstr(SCARG(uap, bootstr), bs, sizeof(bs), 0);

                if (error)
                        bootstr = NULL;
                else
                        bootstr = bs;
        } else
                bootstr = NULL;

        SCARG(&ua, opt) = bsd_howto;
        SCARG(&ua, bootstr) = bootstr;
        sys_reboot(l, &ua, retval);
        return(0);
}

/*
 * Generalized interface signal handler, 4.3-compatible.
 */
/* ARGSUSED */
int
sunos_sys_sigvec(struct lwp *l, const struct sunos_sys_sigvec_args *uap, register_t *retval)
{
        /* {
                syscallarg(int) signum;
                syscallarg(struct sigvec *) nsv;
                syscallarg(struct sigvec *) osv;
        } */
        struct sigvec nsv, osv;
        struct sigaction nsa, osa;
        int error;
/*XXX*/extern   void compat_43_sigvec_to_sigaction
(const struct sigvec *, struct sigaction *);
/*XXX*/extern   void compat_43_sigaction_to_sigvec
(const struct sigaction *, struct sigvec *);

        if (SCARG(uap, nsv)) {
                error = copyin(SCARG(uap, nsv), &nsv, sizeof(nsv));
                if (error != 0)
                        return (error);

                /*
                 * SunOS uses the mask 0x0004 as SV_RESETHAND
                 * meaning: `reset to SIG_DFL on delivery'.
                 * We support only the bits in: 0xF
                 * (those bits are the same as ours)
                 */
                if (nsv.sv_flags & ~0xF)
                        return (EINVAL);

                compat_43_sigvec_to_sigaction(&nsv, &nsa);
        }
        error = sigaction1(l, SCARG(uap, signum),
                           SCARG(uap, nsv) ? &nsa : 0,
                           SCARG(uap, osv) ? &osa : 0,
                           NULL, 0);
        if (error != 0)
                return (error);

        if (SCARG(uap, osv)) {
                compat_43_sigaction_to_sigvec(&osa, &osv);
                error = copyout(&osv, SCARG(uap, osv), sizeof(osv));
                if (error != 0)
                        return (error);
        }

        return (0);
}