The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/ibcs2/ibcs2_xenix.c

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    1 /*-
    2  * Copyright (c) 1994 Sean Eric Fagan
    3  * Copyright (c) 1994 Søren Schmidt
    4  * Copyright (c) 1995 Steven Wallace
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer
   12  *    in this position and unchanged.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. The name of the author may not be used to endorse or promote products
   17  *    derived from this software withough specific prior written permission
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29  *
   30  * $FreeBSD: stable/4/sys/i386/ibcs2/ibcs2_xenix.c 54655 1999-12-15 23:02:35Z eivind $
   31  */
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/namei.h> 
   36 #include <sys/sysproto.h>
   37 #include <sys/kernel.h>
   38 #include <sys/filio.h>
   39 #include <sys/vnode.h>
   40 #include <sys/sysctl.h>
   41 
   42 #include <machine/cpu.h>
   43 
   44 #include <i386/ibcs2/ibcs2_types.h>
   45 #include <i386/ibcs2/ibcs2_unistd.h>
   46 #include <i386/ibcs2/ibcs2_signal.h>
   47 #include <i386/ibcs2/ibcs2_util.h>
   48 #include <i386/ibcs2/ibcs2_proto.h>
   49 #include <i386/ibcs2/ibcs2_xenix.h>
   50 #include <i386/ibcs2/ibcs2_xenix_syscall.h>
   51 
   52 #include <vm/vm_zone.h>
   53 
   54 extern struct sysent xenix_sysent[];
   55 
   56 int
   57 ibcs2_xenix(struct proc *p, struct ibcs2_xenix_args *uap)
   58 {
   59         struct trapframe *tf = p->p_md.md_regs;
   60         struct sysent *callp;
   61         u_int code;             
   62 
   63         code = (tf->tf_eax & 0xff00) >> 8;
   64         callp = &xenix_sysent[code];
   65 
   66         if(code < IBCS2_XENIX_MAXSYSCALL)
   67           return((*callp->sy_call)(p, (void *)uap));
   68         else
   69           return ENOSYS;
   70 }
   71 
   72 int
   73 xenix_rdchk(p, uap)
   74         struct proc *p;
   75         struct xenix_rdchk_args *uap;
   76 {
   77         int error;
   78         struct ioctl_args sa;
   79         caddr_t sg = stackgap_init();
   80 
   81         DPRINTF(("IBCS2: 'xenix rdchk'\n"));
   82         SCARG(&sa, fd) = SCARG(uap, fd);
   83         SCARG(&sa, com) = FIONREAD;
   84         SCARG(&sa, data) = stackgap_alloc(&sg, sizeof(int));
   85         if ((error = ioctl(p, &sa)) != 0)
   86                 return error;
   87         p->p_retval[0] = (*((int*)SCARG(&sa, data))) ? 1 : 0;
   88         return 0;
   89 }
   90 
   91 int
   92 xenix_chsize(p, uap)
   93         struct proc *p;
   94         struct xenix_chsize_args *uap;
   95 {
   96         struct ftruncate_args sa;
   97 
   98         DPRINTF(("IBCS2: 'xenix chsize'\n"));
   99         SCARG(&sa, fd) = SCARG(uap, fd);
  100         SCARG(&sa, pad) = 0;
  101         SCARG(&sa, length) = SCARG(uap, size);
  102         return ftruncate(p, &sa);
  103 }
  104 
  105 
  106 int
  107 xenix_ftime(p, uap)
  108         struct proc *p;
  109         struct xenix_ftime_args *uap;
  110 {
  111         struct timeval tv;
  112         struct ibcs2_timeb {
  113                 unsigned long time __attribute__((packed));
  114                 unsigned short millitm;
  115                 short timezone;
  116                 short dstflag;
  117         } itb;
  118 
  119         DPRINTF(("IBCS2: 'xenix ftime'\n"));
  120         microtime(&tv);
  121         itb.time = tv.tv_sec;
  122         itb.millitm = (tv.tv_usec / 1000);
  123         itb.timezone = tz.tz_minuteswest;
  124         itb.dstflag = tz.tz_dsttime != DST_NONE;
  125 
  126         return copyout((caddr_t)&itb, (caddr_t)SCARG(uap, tp),
  127                        sizeof(struct ibcs2_timeb));
  128 }
  129 
  130 int
  131 xenix_nap(struct proc *p, struct xenix_nap_args *uap)
  132 {
  133         long period;
  134 
  135         DPRINTF(("IBCS2: 'xenix nap %d ms'\n", SCARG(uap, millisec)));
  136         period = (long)SCARG(uap, millisec) / (1000/hz);
  137         if (period)
  138                 while (tsleep(&period, PPAUSE, "nap", period) 
  139                        != EWOULDBLOCK) ;
  140         return 0;
  141 }
  142 
  143 int
  144 xenix_utsname(struct proc *p, struct xenix_utsname_args *uap)
  145 {
  146         struct ibcs2_sco_utsname {
  147                 char sysname[9];
  148                 char nodename[9];
  149                 char release[16];
  150                 char kernelid[20];
  151                 char machine[9];
  152                 char bustype[9];
  153                 char sysserial[10];
  154                 unsigned short sysorigin;
  155                 unsigned short sysoem;
  156                 char numusers[9];
  157                 unsigned short numcpu;
  158         } ibcs2_sco_uname;
  159 
  160         DPRINTF(("IBCS2: 'xenix sco_utsname'\n"));
  161         bzero(&ibcs2_sco_uname, sizeof(struct ibcs2_sco_utsname));
  162         strncpy(ibcs2_sco_uname.sysname, ostype,
  163                 sizeof(ibcs2_sco_uname.sysname) - 1);
  164         strncpy(ibcs2_sco_uname.nodename, hostname,
  165                 sizeof(ibcs2_sco_uname.nodename) - 1);
  166         strncpy(ibcs2_sco_uname.release, osrelease,
  167                 sizeof(ibcs2_sco_uname.release) - 1);
  168         strncpy(ibcs2_sco_uname.kernelid, version,
  169                 sizeof(ibcs2_sco_uname.kernelid) - 1);
  170         strncpy(ibcs2_sco_uname.machine, machine,
  171                 sizeof(ibcs2_sco_uname.machine) - 1);
  172         strncpy(ibcs2_sco_uname.bustype, "ISA/EISA",
  173                 sizeof(ibcs2_sco_uname.bustype) - 1);
  174         strncpy(ibcs2_sco_uname.sysserial, "no charge",
  175                 sizeof(ibcs2_sco_uname.sysserial) - 1);
  176         strncpy(ibcs2_sco_uname.numusers, "unlim",
  177                 sizeof(ibcs2_sco_uname.numusers) - 1);
  178         ibcs2_sco_uname.sysorigin = 0xFFFF;
  179         ibcs2_sco_uname.sysoem = 0xFFFF;
  180         ibcs2_sco_uname.numcpu = 1;
  181         return copyout((caddr_t)&ibcs2_sco_uname,
  182                        (caddr_t)(void *)(intptr_t)uap->addr,
  183                        sizeof(struct ibcs2_sco_utsname));
  184 }
  185 
  186 int
  187 xenix_scoinfo(struct proc *p, struct xenix_scoinfo_args *uap)
  188 {
  189   /* scoinfo (not documented) */
  190   p->p_retval[0] = 0;
  191   return 0;
  192 }
  193 
  194 int     
  195 xenix_eaccess(struct proc *p, struct xenix_eaccess_args *uap)
  196 {
  197         struct ucred *cred = p->p_ucred;
  198         struct vnode *vp;
  199         struct nameidata nd;
  200         int error, flags;
  201         caddr_t sg = stackgap_init();
  202 
  203         CHECKALTEXIST(p, &sg, SCARG(uap, path));
  204 
  205         NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
  206             SCARG(uap, path), p);
  207         if ((error = namei(&nd)) != 0)
  208                 return error;
  209         vp = nd.ni_vp;
  210 
  211         /* Flags == 0 means only check for existence. */
  212         if (SCARG(uap, flags)) {
  213                 flags = 0;
  214                 if (SCARG(uap, flags) & IBCS2_R_OK)
  215                         flags |= VREAD;
  216                 if (SCARG(uap, flags) & IBCS2_W_OK)
  217                         flags |= VWRITE;
  218                 if (SCARG(uap, flags) & IBCS2_X_OK)
  219                         flags |= VEXEC;
  220                 if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
  221                         error = VOP_ACCESS(vp, flags, cred, p);
  222         }
  223         NDFREE(&nd, NDF_ONLY_PNBUF);
  224         vput(vp);
  225         return error;
  226 }

Cache object: 60afb5a1289e090626a557ad8aad460b


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