91f1c2b3cc
prevent the compiler from optimizing assignments into byte-copy operations which might make access to the individual fields non-atomic. Use the individual fields throughout, and don't bother locking them with Giant: it is no longer needed. Inspired by: tjr
227 lines
6.3 KiB
C
227 lines
6.3 KiB
C
/*-
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* Copyright (c) 1994 Sean Eric Fagan
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* Copyright (c) 1994 Søren Schmidt
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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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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. 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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* $FreeBSD$
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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/namei.h>
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#include <sys/sysproto.h>
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#include <sys/jail.h>
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#include <sys/kernel.h>
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#include <sys/filio.h>
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#include <sys/vnode.h>
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#include <sys/sysctl.h>
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#include <machine/cpu.h>
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#include <i386/ibcs2/ibcs2_types.h>
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#include <i386/ibcs2/ibcs2_unistd.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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#include <i386/ibcs2/ibcs2_xenix.h>
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#include <i386/ibcs2/ibcs2_xenix_syscall.h>
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extern struct sysent xenix_sysent[];
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int
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ibcs2_xenix(struct thread *td, struct ibcs2_xenix_args *uap)
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{
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struct trapframe *tf = td->td_frame;
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struct sysent *callp;
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u_int code;
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code = (tf->tf_eax & 0xff00) >> 8;
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callp = &xenix_sysent[code];
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if(code < IBCS2_XENIX_MAXSYSCALL)
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return((*callp->sy_call)(td, (void *)uap));
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else
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return ENOSYS;
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}
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int
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xenix_rdchk(td, uap)
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struct thread *td;
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struct xenix_rdchk_args *uap;
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{
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int error;
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struct ioctl_args sa;
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caddr_t sg = stackgap_init();
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DPRINTF(("IBCS2: 'xenix rdchk'\n"));
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sa.fd = uap->fd;
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sa.com = FIONREAD;
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sa.data = stackgap_alloc(&sg, sizeof(int));
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if ((error = ioctl(td, &sa)) != 0)
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return error;
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td->td_retval[0] = (*((int*)sa.data)) ? 1 : 0;
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return 0;
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}
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int
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xenix_chsize(td, uap)
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struct thread *td;
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struct xenix_chsize_args *uap;
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{
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struct ftruncate_args sa;
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DPRINTF(("IBCS2: 'xenix chsize'\n"));
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sa.fd = uap->fd;
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sa.pad = 0;
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sa.length = uap->size;
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return ftruncate(td, &sa);
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}
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int
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xenix_ftime(td, uap)
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struct thread *td;
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struct xenix_ftime_args *uap;
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{
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struct timeval tv;
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struct ibcs2_timeb {
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unsigned long time __packed;
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unsigned short millitm;
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short timezone;
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short dstflag;
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} itb;
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DPRINTF(("IBCS2: 'xenix ftime'\n"));
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microtime(&tv);
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itb.time = tv.tv_sec;
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itb.millitm = (tv.tv_usec / 1000);
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itb.timezone = tz_minuteswest;
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itb.dstflag = tz_dsttime != DST_NONE;
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return copyout((caddr_t)&itb, (caddr_t)uap->tp,
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sizeof(struct ibcs2_timeb));
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}
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int
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xenix_nap(struct thread *td, struct xenix_nap_args *uap)
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{
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long period;
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DPRINTF(("IBCS2: 'xenix nap %d ms'\n", uap->millisec));
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period = (long)uap->millisec / (1000/hz);
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if (period)
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while (tsleep(&period, PPAUSE, "nap", period)
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!= EWOULDBLOCK) ;
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return 0;
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}
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int
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xenix_utsname(struct thread *td, struct xenix_utsname_args *uap)
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{
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struct ibcs2_sco_utsname {
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char sysname[9];
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char nodename[9];
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char release[16];
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char kernelid[20];
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char machine[9];
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char bustype[9];
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char sysserial[10];
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unsigned short sysorigin;
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unsigned short sysoem;
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char numusers[9];
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unsigned short numcpu;
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} ibcs2_sco_uname;
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DPRINTF(("IBCS2: 'xenix sco_utsname'\n"));
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bzero(&ibcs2_sco_uname, sizeof(struct ibcs2_sco_utsname));
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strncpy(ibcs2_sco_uname.sysname, ostype,
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sizeof(ibcs2_sco_uname.sysname) - 1);
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getcredhostname(td->td_ucred, ibcs2_sco_uname.nodename,
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sizeof(ibcs2_sco_uname.nodename) - 1);
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strncpy(ibcs2_sco_uname.release, osrelease,
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sizeof(ibcs2_sco_uname.release) - 1);
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strncpy(ibcs2_sco_uname.kernelid, version,
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sizeof(ibcs2_sco_uname.kernelid) - 1);
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strncpy(ibcs2_sco_uname.machine, machine,
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sizeof(ibcs2_sco_uname.machine) - 1);
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strncpy(ibcs2_sco_uname.bustype, "ISA/EISA",
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sizeof(ibcs2_sco_uname.bustype) - 1);
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strncpy(ibcs2_sco_uname.sysserial, "no charge",
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sizeof(ibcs2_sco_uname.sysserial) - 1);
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strncpy(ibcs2_sco_uname.numusers, "unlim",
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sizeof(ibcs2_sco_uname.numusers) - 1);
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ibcs2_sco_uname.sysorigin = 0xFFFF;
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ibcs2_sco_uname.sysoem = 0xFFFF;
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ibcs2_sco_uname.numcpu = 1;
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return copyout((caddr_t)&ibcs2_sco_uname,
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(caddr_t)(void *)(intptr_t)uap->addr,
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sizeof(struct ibcs2_sco_utsname));
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}
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int
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xenix_scoinfo(struct thread *td, struct xenix_scoinfo_args *uap)
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{
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/* scoinfo (not documented) */
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td->td_retval[0] = 0;
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return 0;
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}
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int
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xenix_eaccess(struct thread *td, struct xenix_eaccess_args *uap)
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{
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struct ucred *cred = td->td_ucred;
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struct vnode *vp;
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struct nameidata nd;
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int error, flags;
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caddr_t sg = stackgap_init();
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CHECKALTEXIST(td, &sg, uap->path);
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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uap->path, td);
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if ((error = namei(&nd)) != 0)
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return error;
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vp = nd.ni_vp;
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/* Flags == 0 means only check for existence. */
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if (uap->flags) {
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flags = 0;
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if (uap->flags & IBCS2_R_OK)
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flags |= VREAD;
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if (uap->flags & IBCS2_W_OK)
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flags |= VWRITE;
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if (uap->flags & IBCS2_X_OK)
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flags |= VEXEC;
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if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
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error = VOP_ACCESS(vp, flags, cred, td);
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}
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NDFREE(&nd, NDF_ONLY_PNBUF);
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vput(vp);
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return error;
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}
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