473fbdbe96
This is truly a hack. The idea is taken from the Linux ibcs2 emulator. To use this feature, you must use the option, options SPX_HACK in your config. Also, in /compat/ibcs2/dev, you must do: lrwxr-xr-x 1 root wheel 9 Oct 15 22:20 X0R@ -> /dev/null lrwxr-xr-x 1 root wheel 7 Oct 15 22:20 nfsd@ -> socksys lrwxr-xr-x 1 root wheel 9 Oct 15 22:20 socksys@ -> /dev/null crw-rw-rw- 1 root wheel 41, 1 Oct 15 22:14 spx Do NOT use old socksys driver as that has been removed. This hack needs /compat/ibcs2/dev/spx to be any device that does NOT exist/configured (so the now non-existant spx major/minor works fine). When an open() is called, the error ENXIO is checked and then the path is checked. If spx open detected, then a unix socket is opened to the hardcoded path "/tmp/.X11-unix/X0". As the Linux hacker author mentioned, the real way would be to detect the getmsg/putmsg through /dev/X0R and /dev/spx. Until this true solution is implemented (if ever), I think this hack is important enough to be put into the tree, even though I don't like it dirtying up my clean code (which is what #ifdef SPX_HACK is for).
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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* Copyright (c) 1995 Steven Wallace
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id$
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*/
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/*
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* IBCS2 compatibility module.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <sys/kernel.h>
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#include <i386/ibcs2/ibcs2_types.h>
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#include <i386/ibcs2/ibcs2_signal.h>
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#include <i386/ibcs2/ibcs2_util.h>
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#include <i386/ibcs2/ibcs2_proto.h>
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#define IBCS2_SECURE_GETLUID 1
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#define IBCS2_SECURE_SETLUID 2
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int
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ibcs2_secure(struct proc *p, struct ibcs2_secure_args *uap, int *retval)
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{
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switch (uap->cmd) {
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case IBCS2_SECURE_GETLUID: /* get login uid */
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*retval = p->p_ucred->cr_uid;
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return 0;
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case IBCS2_SECURE_SETLUID: /* set login uid */
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return EPERM;
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default:
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printf("IBCS2: 'secure' cmd=%d not implemented\n", uap->cmd);
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}
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return EINVAL;
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}
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int
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ibcs2_lseek(struct proc *p, register struct ibcs2_lseek_args *uap, int *retval)
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{
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struct lseek_args largs;
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off_t lret;
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int error;
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largs.fd = uap->fd;
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largs.offset = uap->offset;
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largs.whence = uap->whence;
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error = lseek(p, &largs, (int *)&lret);
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*(long *)retval = lret;
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return (error);
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}
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#ifdef SPX_HACK
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#include <sys/socket.h>
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#include <sys/un.h>
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int
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spx_open(struct proc *p, void *uap, int *retval)
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{
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struct socket_args sock;
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struct connect_args conn;
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struct sockaddr_un *Xaddr;
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caddr_t name;
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int fd, error;
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caddr_t sg = stackgap_init();
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/* obtain a socket. */
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DPRINTF(("SPX: open socket\n"));
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sock.domain = AF_UNIX;
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sock.type = SOCK_STREAM;
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sock.protocol = 0;
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error = socket(p, &sock, retval);
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if (error)
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return error;
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/* connect the socket to standard X socket */
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DPRINTF(("SPX: connect to /tmp/X11-unix/X0\n"));
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Xaddr = stackgap_alloc(&sg, sizeof(struct sockaddr_un));
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Xaddr->sun_family = AF_UNIX;
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Xaddr->sun_len = sizeof(struct sockaddr_un) - sizeof(Xaddr->sun_path) +
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strlen(Xaddr->sun_path) + 1;
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copyout("/tmp/.X11-unix/X0", Xaddr->sun_path, 18);
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conn.s = fd = *retval;
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conn.name = (caddr_t)Xaddr;
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conn.namelen = sizeof(struct sockaddr_un);
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error = connect(p, &conn, retval);
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if (error) {
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struct close_args cl;
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cl.fd = fd;
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close(p, &cl, retval);
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return error;
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}
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*retval = fd;
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return 0;
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}
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#endif /* SPX_HACK */
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