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_fcntl.c

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    1 /*-
    2  * Copyright (c) 1995 Scott Bartram
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. The name of the author may not be used to endorse or promote products
   14  *    derived from this software without specific prior written permission
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include "opt_spx_hack.h"
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/fcntl.h>
   36 #include <sys/file.h>
   37 #include <sys/filedesc.h>
   38 #include <sys/lock.h>
   39 #include <sys/mutex.h>
   40 #include <sys/syscallsubr.h>
   41 #include <sys/sysproto.h>
   42 #include <sys/ttycom.h>
   43 
   44 #include <i386/ibcs2/ibcs2_fcntl.h>
   45 #include <i386/ibcs2/ibcs2_signal.h>
   46 #include <i386/ibcs2/ibcs2_proto.h>
   47 #include <i386/ibcs2/ibcs2_util.h>
   48 
   49 static void cvt_iflock2flock(struct ibcs2_flock *, struct flock *);
   50 static void cvt_flock2iflock(struct flock *, struct ibcs2_flock *);
   51 static int  cvt_o_flags(int);
   52 static int  oflags2ioflags(int);
   53 static int  ioflags2oflags(int);
   54 
   55 static int
   56 cvt_o_flags(flags)
   57         int flags;
   58 {
   59         int r = 0;
   60 
   61         /* convert mode into NetBSD mode */
   62         if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
   63         if (flags & IBCS2_O_RDWR)   r |= O_RDWR;
   64         if (flags & (IBCS2_O_NDELAY | IBCS2_O_NONBLOCK)) r |= O_NONBLOCK;
   65         if (flags & IBCS2_O_APPEND) r |= O_APPEND;
   66         if (flags & IBCS2_O_SYNC)   r |= O_FSYNC;
   67         if (flags & IBCS2_O_CREAT)  r |= O_CREAT;
   68         if (flags & IBCS2_O_TRUNC)  r |= O_TRUNC /* | O_CREAT ??? */;
   69         if (flags & IBCS2_O_EXCL)   r |= O_EXCL;
   70         if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
   71         if (flags & IBCS2_O_PRIV)   r |= O_EXLOCK;
   72         if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
   73         return r;
   74 }
   75 
   76 static void
   77 cvt_flock2iflock(flp, iflp)
   78         struct flock *flp;
   79         struct ibcs2_flock *iflp;
   80 {
   81         switch (flp->l_type) {
   82         case F_RDLCK:
   83                 iflp->l_type = IBCS2_F_RDLCK;
   84                 break;
   85         case F_WRLCK:
   86                 iflp->l_type = IBCS2_F_WRLCK;
   87                 break;
   88         case F_UNLCK:
   89                 iflp->l_type = IBCS2_F_UNLCK;
   90                 break;
   91         }
   92         iflp->l_whence = (short)flp->l_whence;
   93         iflp->l_start = (ibcs2_off_t)flp->l_start;
   94         iflp->l_len = (ibcs2_off_t)flp->l_len;
   95         iflp->l_sysid = 0;
   96         iflp->l_pid = (ibcs2_pid_t)flp->l_pid;
   97 }
   98 
   99 #ifdef DEBUG_IBCS2
  100 static void
  101 print_flock(struct flock *flp)
  102 {
  103   printf("flock: start=%x len=%x pid=%d type=%d whence=%d\n",
  104          (int)flp->l_start, (int)flp->l_len, (int)flp->l_pid,
  105          flp->l_type, flp->l_whence);
  106 }
  107 #endif
  108 
  109 static void
  110 cvt_iflock2flock(iflp, flp)
  111         struct ibcs2_flock *iflp;
  112         struct flock *flp;
  113 {
  114         flp->l_start = (off_t)iflp->l_start;
  115         flp->l_len = (off_t)iflp->l_len;
  116         flp->l_pid = (pid_t)iflp->l_pid;
  117         switch (iflp->l_type) {
  118         case IBCS2_F_RDLCK:
  119                 flp->l_type = F_RDLCK;
  120                 break;
  121         case IBCS2_F_WRLCK:
  122                 flp->l_type = F_WRLCK;
  123                 break;
  124         case IBCS2_F_UNLCK:
  125                 flp->l_type = F_UNLCK;
  126                 break;
  127         }
  128         flp->l_whence = iflp->l_whence;
  129 }
  130 
  131 /* convert iBCS2 mode into NetBSD mode */
  132 static int
  133 ioflags2oflags(flags)
  134         int flags;
  135 {
  136         int r = 0;
  137         
  138         if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
  139         if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
  140         if (flags & IBCS2_O_RDWR) r |= O_RDWR;
  141         if (flags & IBCS2_O_NDELAY) r |= O_NONBLOCK;
  142         if (flags & IBCS2_O_APPEND) r |= O_APPEND;
  143         if (flags & IBCS2_O_SYNC) r |= O_FSYNC;
  144         if (flags & IBCS2_O_NONBLOCK) r |= O_NONBLOCK;
  145         if (flags & IBCS2_O_CREAT) r |= O_CREAT;
  146         if (flags & IBCS2_O_TRUNC) r |= O_TRUNC;
  147         if (flags & IBCS2_O_EXCL) r |= O_EXCL;
  148         if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
  149         return r;
  150 }
  151 
  152 /* convert NetBSD mode into iBCS2 mode */
  153 static int
  154 oflags2ioflags(flags)
  155         int flags;
  156 {
  157         int r = 0;
  158         
  159         if (flags & O_RDONLY) r |= IBCS2_O_RDONLY;
  160         if (flags & O_WRONLY) r |= IBCS2_O_WRONLY;
  161         if (flags & O_RDWR) r |= IBCS2_O_RDWR;
  162         if (flags & O_NDELAY) r |= IBCS2_O_NONBLOCK;
  163         if (flags & O_APPEND) r |= IBCS2_O_APPEND;
  164         if (flags & O_FSYNC) r |= IBCS2_O_SYNC;
  165         if (flags & O_NONBLOCK) r |= IBCS2_O_NONBLOCK;
  166         if (flags & O_CREAT) r |= IBCS2_O_CREAT;
  167         if (flags & O_TRUNC) r |= IBCS2_O_TRUNC;
  168         if (flags & O_EXCL) r |= IBCS2_O_EXCL;
  169         if (flags & O_NOCTTY) r |= IBCS2_O_NOCTTY;
  170         return r;
  171 }
  172 
  173 int
  174 ibcs2_open(td, uap)
  175         struct thread *td;
  176         struct ibcs2_open_args *uap;
  177 {
  178         struct proc *p = td->td_proc;
  179         int noctty = uap->flags & IBCS2_O_NOCTTY;
  180         int ret;
  181         caddr_t sg = stackgap_init();
  182 
  183         uap->flags = cvt_o_flags(uap->flags);
  184         if (uap->flags & O_CREAT)
  185                 CHECKALTCREAT(td, &sg, uap->path);
  186         else
  187                 CHECKALTEXIST(td, &sg, uap->path);
  188         ret = open(td, (struct open_args *)uap);
  189 
  190 #ifdef SPX_HACK
  191         if (ret == ENXIO) {
  192                 if (!strcmp(uap->path, "/compat/ibcs2/dev/spx"))
  193                         ret = spx_open(td, uap);
  194         } else
  195 #endif /* SPX_HACK */
  196         PROC_LOCK(p);
  197         if (!ret && !noctty && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
  198                 struct file *fp;
  199                 int error;
  200 
  201                 error = fget(td, td->td_retval[0], &fp);
  202                 PROC_UNLOCK(p);
  203                 if (error)
  204                         return (EBADF);
  205 
  206                 /* ignore any error, just give it a try */
  207                 if (fp->f_type == DTYPE_VNODE)
  208                         fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0, td->td_ucred,
  209                             td);
  210                 fdrop(fp, td);
  211         } else
  212                 PROC_UNLOCK(p);
  213         return ret;
  214 }
  215 
  216 int
  217 ibcs2_creat(td, uap)
  218         struct thread *td;  
  219         struct ibcs2_creat_args *uap;
  220 {       
  221         struct open_args cup;   
  222         caddr_t sg = stackgap_init();
  223 
  224         CHECKALTCREAT(td, &sg, uap->path);
  225         cup.path = uap->path;
  226         cup.mode = uap->mode;
  227         cup.flags = O_WRONLY | O_CREAT | O_TRUNC;
  228         return open(td, &cup);
  229 }       
  230 
  231 int
  232 ibcs2_access(td, uap)
  233         struct thread *td;
  234         struct ibcs2_access_args *uap;
  235 {
  236         struct access_args cup;
  237         caddr_t sg = stackgap_init();
  238 
  239         CHECKALTEXIST(td, &sg, uap->path);
  240         cup.path = uap->path;
  241         cup.flags = uap->flags;
  242         return access(td, &cup);
  243 }
  244 
  245 int
  246 ibcs2_fcntl(td, uap)
  247         struct thread *td;
  248         struct ibcs2_fcntl_args *uap;
  249 {
  250         intptr_t arg;
  251         int error;
  252         struct flock fl;
  253         struct ibcs2_flock ifl;
  254 
  255         arg = (intptr_t)uap->arg;
  256         switch(uap->cmd) {
  257         case IBCS2_F_DUPFD:
  258                 return (kern_fcntl(td, uap->fd, F_DUPFD, arg));
  259         case IBCS2_F_GETFD:
  260                 return (kern_fcntl(td, uap->fd, F_GETFD, arg));
  261         case IBCS2_F_SETFD:
  262                 return (kern_fcntl(td, uap->fd, F_SETFD, arg));
  263         case IBCS2_F_GETFL:
  264                 error = kern_fcntl(td, uap->fd, F_GETFL, arg);
  265                 if (error)
  266                         return error;
  267                 td->td_retval[0] = oflags2ioflags(td->td_retval[0]);
  268                 return error;
  269         case IBCS2_F_SETFL:
  270                 return (kern_fcntl(td, uap->fd, F_SETFL,
  271                     ioflags2oflags(arg)));
  272 
  273         case IBCS2_F_GETLK:
  274             {
  275                 error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
  276                                ibcs2_flock_len);
  277                 if (error)
  278                         return error;
  279                 cvt_iflock2flock(&ifl, &fl);
  280                 error = kern_fcntl(td, uap->fd, F_GETLK, (intptr_t)&fl);
  281                 if (error)
  282                         return error;
  283                 cvt_flock2iflock(&fl, &ifl);
  284                 return copyout((caddr_t)&ifl, (caddr_t)uap->arg,
  285                                ibcs2_flock_len);
  286             }
  287 
  288         case IBCS2_F_SETLK:
  289             {
  290                 error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
  291                                ibcs2_flock_len);
  292                 if (error)
  293                         return error;
  294                 cvt_iflock2flock(&ifl, &fl);
  295                 return (kern_fcntl(td, uap->fd, F_SETLK, (intptr_t)&fl));
  296             }
  297 
  298         case IBCS2_F_SETLKW:
  299             {
  300                 error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
  301                                ibcs2_flock_len);
  302                 if (error)
  303                         return error;
  304                 cvt_iflock2flock(&ifl, &fl);
  305                 return (kern_fcntl(td, uap->fd, F_SETLKW, (intptr_t)&fl));
  306             }
  307         }
  308         return ENOSYS;
  309 }

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