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: stable/8/sys/i386/ibcs2/ibcs2_fcntl.c 199583 2009-11-20 15:27:52Z jhb $");
   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/malloc.h>
   40 #include <sys/mutex.h>
   41 #include <sys/syscallsubr.h>
   42 #include <sys/sysproto.h>
   43 #include <sys/ttycom.h>
   44 
   45 #include <i386/ibcs2/ibcs2_fcntl.h>
   46 #include <i386/ibcs2/ibcs2_signal.h>
   47 #include <i386/ibcs2/ibcs2_proto.h>
   48 #include <i386/ibcs2/ibcs2_util.h>
   49 
   50 static void cvt_iflock2flock(struct ibcs2_flock *, struct flock *);
   51 static void cvt_flock2iflock(struct flock *, struct ibcs2_flock *);
   52 static int  cvt_o_flags(int);
   53 static int  oflags2ioflags(int);
   54 static int  ioflags2oflags(int);
   55 
   56 static int
   57 cvt_o_flags(flags)
   58         int flags;
   59 {
   60         int r = 0;
   61 
   62         /* convert mode into NetBSD mode */
   63         if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
   64         if (flags & IBCS2_O_RDWR)   r |= O_RDWR;
   65         if (flags & (IBCS2_O_NDELAY | IBCS2_O_NONBLOCK)) r |= O_NONBLOCK;
   66         if (flags & IBCS2_O_APPEND) r |= O_APPEND;
   67         if (flags & IBCS2_O_SYNC)   r |= O_FSYNC;
   68         if (flags & IBCS2_O_CREAT)  r |= O_CREAT;
   69         if (flags & IBCS2_O_TRUNC)  r |= O_TRUNC /* | O_CREAT ??? */;
   70         if (flags & IBCS2_O_EXCL)   r |= O_EXCL;
   71         if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
   72         if (flags & IBCS2_O_PRIV)   r |= O_EXLOCK;
   73         if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
   74         return r;
   75 }
   76 
   77 static void
   78 cvt_flock2iflock(flp, iflp)
   79         struct flock *flp;
   80         struct ibcs2_flock *iflp;
   81 {
   82         switch (flp->l_type) {
   83         case F_RDLCK:
   84                 iflp->l_type = IBCS2_F_RDLCK;
   85                 break;
   86         case F_WRLCK:
   87                 iflp->l_type = IBCS2_F_WRLCK;
   88                 break;
   89         case F_UNLCK:
   90                 iflp->l_type = IBCS2_F_UNLCK;
   91                 break;
   92         }
   93         iflp->l_whence = (short)flp->l_whence;
   94         iflp->l_start = (ibcs2_off_t)flp->l_start;
   95         iflp->l_len = (ibcs2_off_t)flp->l_len;
   96         iflp->l_sysid = flp->l_sysid;
   97         iflp->l_pid = (ibcs2_pid_t)flp->l_pid;
   98 }
   99 
  100 #ifdef DEBUG_IBCS2
  101 static void
  102 print_flock(struct flock *flp)
  103 {
  104   printf("flock: start=%x len=%x pid=%d type=%d whence=%d\n",
  105          (int)flp->l_start, (int)flp->l_len, (int)flp->l_pid,
  106          flp->l_type, flp->l_whence);
  107 }
  108 #endif
  109 
  110 static void
  111 cvt_iflock2flock(iflp, flp)
  112         struct ibcs2_flock *iflp;
  113         struct flock *flp;
  114 {
  115         flp->l_start = (off_t)iflp->l_start;
  116         flp->l_len = (off_t)iflp->l_len;
  117         flp->l_pid = (pid_t)iflp->l_pid;
  118         switch (iflp->l_type) {
  119         case IBCS2_F_RDLCK:
  120                 flp->l_type = F_RDLCK;
  121                 break;
  122         case IBCS2_F_WRLCK:
  123                 flp->l_type = F_WRLCK;
  124                 break;
  125         case IBCS2_F_UNLCK:
  126                 flp->l_type = F_UNLCK;
  127                 break;
  128         }
  129         flp->l_whence = iflp->l_whence;
  130         flp->l_sysid = iflp->l_sysid;
  131 }
  132 
  133 /* convert iBCS2 mode into NetBSD mode */
  134 static int
  135 ioflags2oflags(flags)
  136         int flags;
  137 {
  138         int r = 0;
  139         
  140         if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
  141         if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
  142         if (flags & IBCS2_O_RDWR) r |= O_RDWR;
  143         if (flags & IBCS2_O_NDELAY) r |= O_NONBLOCK;
  144         if (flags & IBCS2_O_APPEND) r |= O_APPEND;
  145         if (flags & IBCS2_O_SYNC) r |= O_FSYNC;
  146         if (flags & IBCS2_O_NONBLOCK) r |= O_NONBLOCK;
  147         if (flags & IBCS2_O_CREAT) r |= O_CREAT;
  148         if (flags & IBCS2_O_TRUNC) r |= O_TRUNC;
  149         if (flags & IBCS2_O_EXCL) r |= O_EXCL;
  150         if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
  151         return r;
  152 }
  153 
  154 /* convert NetBSD mode into iBCS2 mode */
  155 static int
  156 oflags2ioflags(flags)
  157         int flags;
  158 {
  159         int r = 0;
  160         
  161         if (flags & O_RDONLY) r |= IBCS2_O_RDONLY;
  162         if (flags & O_WRONLY) r |= IBCS2_O_WRONLY;
  163         if (flags & O_RDWR) r |= IBCS2_O_RDWR;
  164         if (flags & O_NDELAY) r |= IBCS2_O_NONBLOCK;
  165         if (flags & O_APPEND) r |= IBCS2_O_APPEND;
  166         if (flags & O_FSYNC) r |= IBCS2_O_SYNC;
  167         if (flags & O_NONBLOCK) r |= IBCS2_O_NONBLOCK;
  168         if (flags & O_CREAT) r |= IBCS2_O_CREAT;
  169         if (flags & O_TRUNC) r |= IBCS2_O_TRUNC;
  170         if (flags & O_EXCL) r |= IBCS2_O_EXCL;
  171         if (flags & O_NOCTTY) r |= IBCS2_O_NOCTTY;
  172         return r;
  173 }
  174 
  175 int
  176 ibcs2_open(td, uap)
  177         struct thread *td;
  178         struct ibcs2_open_args *uap;
  179 {
  180         struct proc *p;
  181         char *path;
  182         int flags, noctty, ret;
  183 
  184         p = td->td_proc;
  185         noctty = uap->flags & IBCS2_O_NOCTTY;
  186         flags = cvt_o_flags(uap->flags);
  187         if (uap->flags & O_CREAT)
  188                 CHECKALTCREAT(td, uap->path, &path);
  189         else
  190                 CHECKALTEXIST(td, uap->path, &path);
  191         ret = kern_open(td, path, UIO_SYSSPACE, flags, uap->mode);
  192 
  193 #ifdef SPX_HACK
  194         if (ret == ENXIO) {
  195                 if (!strcmp(path, "/compat/ibcs2/dev/spx"))
  196                         ret = spx_open(td);
  197                 free(path, M_TEMP);
  198         } else
  199 #endif /* SPX_HACK */
  200         free(path, M_TEMP);
  201         PROC_LOCK(p);
  202         if (!ret && !noctty && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
  203                 struct file *fp;
  204                 int error;
  205 
  206                 error = fget(td, td->td_retval[0], &fp);
  207                 PROC_UNLOCK(p);
  208                 if (error)
  209                         return (EBADF);
  210 
  211                 /* ignore any error, just give it a try */
  212                 if (fp->f_type == DTYPE_VNODE)
  213                         fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0, td->td_ucred,
  214                             td);
  215                 fdrop(fp, td);
  216         } else
  217                 PROC_UNLOCK(p);
  218         return ret;
  219 }
  220 
  221 int
  222 ibcs2_creat(td, uap)
  223         struct thread *td;  
  224         struct ibcs2_creat_args *uap;
  225 {
  226         char *path;
  227         int error;
  228 
  229         CHECKALTCREAT(td, uap->path, &path);
  230         error = kern_open(td, path, UIO_SYSSPACE, O_WRONLY | O_CREAT | O_TRUNC,
  231             uap->mode);
  232         free(path, M_TEMP);
  233         return (error);
  234 }       
  235 
  236 int
  237 ibcs2_access(td, uap)
  238         struct thread *td;
  239         struct ibcs2_access_args *uap;
  240 {
  241         char *path;
  242         int error;
  243 
  244         CHECKALTEXIST(td, uap->path, &path);
  245         error = kern_access(td, path, UIO_SYSSPACE, uap->flags);
  246         free(path, M_TEMP);
  247         return (error);
  248 }
  249 
  250 int
  251 ibcs2_fcntl(td, uap)
  252         struct thread *td;
  253         struct ibcs2_fcntl_args *uap;
  254 {
  255         intptr_t arg;
  256         int error;
  257         struct flock fl;
  258         struct ibcs2_flock ifl;
  259 
  260         arg = (intptr_t)uap->arg;
  261         switch(uap->cmd) {
  262         case IBCS2_F_DUPFD:
  263                 return (kern_fcntl(td, uap->fd, F_DUPFD, arg));
  264         case IBCS2_F_GETFD:
  265                 return (kern_fcntl(td, uap->fd, F_GETFD, arg));
  266         case IBCS2_F_SETFD:
  267                 return (kern_fcntl(td, uap->fd, F_SETFD, arg));
  268         case IBCS2_F_GETFL:
  269                 error = kern_fcntl(td, uap->fd, F_GETFL, arg);
  270                 if (error)
  271                         return error;
  272                 td->td_retval[0] = oflags2ioflags(td->td_retval[0]);
  273                 return error;
  274         case IBCS2_F_SETFL:
  275                 return (kern_fcntl(td, uap->fd, F_SETFL,
  276                     ioflags2oflags(arg)));
  277 
  278         case IBCS2_F_GETLK:
  279             {
  280                 error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
  281                                ibcs2_flock_len);
  282                 if (error)
  283                         return error;
  284                 cvt_iflock2flock(&ifl, &fl);
  285                 error = kern_fcntl(td, uap->fd, F_GETLK, (intptr_t)&fl);
  286                 if (error)
  287                         return error;
  288                 cvt_flock2iflock(&fl, &ifl);
  289                 return copyout((caddr_t)&ifl, (caddr_t)uap->arg,
  290                                ibcs2_flock_len);
  291             }
  292 
  293         case IBCS2_F_SETLK:
  294             {
  295                 error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
  296                                ibcs2_flock_len);
  297                 if (error)
  298                         return error;
  299                 cvt_iflock2flock(&ifl, &fl);
  300                 return (kern_fcntl(td, uap->fd, F_SETLK, (intptr_t)&fl));
  301             }
  302 
  303         case IBCS2_F_SETLKW:
  304             {
  305                 error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
  306                                ibcs2_flock_len);
  307                 if (error)
  308                         return error;
  309                 cvt_iflock2flock(&ifl, &fl);
  310                 return (kern_fcntl(td, uap->fd, F_SETLKW, (intptr_t)&fl));
  311             }
  312         }
  313         return ENOSYS;
  314 }

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