svr4_fcntl.c

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    1 /*-
    2  * Copyright (c) 1998 Mark Newton
    3  * Copyright (c) 1994, 1997 Christos Zoulas.  
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. All advertising materials mentioning features or use of this software
   15  *    must display the following acknowledgement:
   16  *      This product includes software developed by Christos Zoulas.
   17  * 4. The name of the author may not be used to endorse or promote products
   18  *    derived from this software without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: releng/8.1/sys/compat/svr4/svr4_fcntl.c 193511 2009-06-05 14:55:22Z rwatson $");
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/file.h>
   38 #include <sys/filedesc.h>
   39 /*#include <sys/ioctl.h>*/
   40 #include <sys/lock.h>
   41 #include <sys/malloc.h>
   42 #include <sys/mount.h>
   43 #include <sys/mutex.h>
   44 #include <sys/namei.h>
   45 #include <sys/priv.h>
   46 #include <sys/proc.h>
   47 #include <sys/stat.h>
   48 #include <sys/syscallsubr.h>
   49 #include <sys/unistd.h>
   50 #include <sys/vnode.h>
   51 
   52 #include <sys/sysproto.h>
   53 
   54 #include <compat/svr4/svr4.h>
   55 #include <compat/svr4/svr4_types.h>
   56 #include <compat/svr4/svr4_signal.h>
   57 #include <compat/svr4/svr4_proto.h>
   58 #include <compat/svr4/svr4_util.h>
   59 #include <compat/svr4/svr4_fcntl.h>
   60 
   61 #include <security/mac/mac_framework.h>
   62 
   63 static int svr4_to_bsd_flags(int);
   64 static u_long svr4_to_bsd_cmd(u_long);
   65 static int fd_revoke(struct thread *, int);
   66 static int fd_truncate(struct thread *, int, struct flock *);
   67 static int bsd_to_svr4_flags(int);
   68 static void bsd_to_svr4_flock(struct flock *, struct svr4_flock *);
   69 static void svr4_to_bsd_flock(struct svr4_flock *, struct flock *);
   70 static void bsd_to_svr4_flock64(struct flock *, struct svr4_flock64 *);
   71 static void svr4_to_bsd_flock64(struct svr4_flock64 *, struct flock *);
   72 
   73 static u_long
   74 svr4_to_bsd_cmd(cmd)
   75         u_long  cmd;
   76 {
   77         switch (cmd) {
   78         case SVR4_F_DUPFD:
   79                 return F_DUPFD;
   80         case SVR4_F_DUP2FD:
   81                 return F_DUP2FD;
   82         case SVR4_F_GETFD:
   83                 return F_GETFD;
   84         case SVR4_F_SETFD:
   85                 return F_SETFD;
   86         case SVR4_F_GETFL:
   87                 return F_GETFL;
   88         case SVR4_F_SETFL:
   89                 return F_SETFL;
   90         case SVR4_F_GETLK:
   91                 return F_GETLK;
   92         case SVR4_F_SETLK:
   93                 return F_SETLK;
   94         case SVR4_F_SETLKW:
   95                 return F_SETLKW;
   96         default:
   97                 return -1;
   98         }
   99 }
  100 
  101 static int
  102 svr4_to_bsd_flags(l)
  103         int     l;
  104 {
  105         int     r = 0;
  106         r |= (l & SVR4_O_RDONLY) ? O_RDONLY : 0;
  107         r |= (l & SVR4_O_WRONLY) ? O_WRONLY : 0;
  108         r |= (l & SVR4_O_RDWR) ? O_RDWR : 0;
  109         r |= (l & SVR4_O_NDELAY) ? O_NONBLOCK : 0;
  110         r |= (l & SVR4_O_APPEND) ? O_APPEND : 0;
  111         r |= (l & SVR4_O_SYNC) ? O_FSYNC : 0;
  112         r |= (l & SVR4_O_NONBLOCK) ? O_NONBLOCK : 0;
  113         r |= (l & SVR4_O_PRIV) ? O_EXLOCK : 0;
  114         r |= (l & SVR4_O_CREAT) ? O_CREAT : 0;
  115         r |= (l & SVR4_O_TRUNC) ? O_TRUNC : 0;
  116         r |= (l & SVR4_O_EXCL) ? O_EXCL : 0;
  117         r |= (l & SVR4_O_NOCTTY) ? O_NOCTTY : 0;
  118         return r;
  119 }
  120 
  121 static int
  122 bsd_to_svr4_flags(l)
  123         int     l;
  124 {
  125         int     r = 0;
  126         r |= (l & O_RDONLY) ? SVR4_O_RDONLY : 0;
  127         r |= (l & O_WRONLY) ? SVR4_O_WRONLY : 0;
  128         r |= (l & O_RDWR) ? SVR4_O_RDWR : 0;
  129         r |= (l & O_NDELAY) ? SVR4_O_NONBLOCK : 0;
  130         r |= (l & O_APPEND) ? SVR4_O_APPEND : 0;
  131         r |= (l & O_FSYNC) ? SVR4_O_SYNC : 0;
  132         r |= (l & O_NONBLOCK) ? SVR4_O_NONBLOCK : 0;
  133         r |= (l & O_EXLOCK) ? SVR4_O_PRIV : 0;
  134         r |= (l & O_CREAT) ? SVR4_O_CREAT : 0;
  135         r |= (l & O_TRUNC) ? SVR4_O_TRUNC : 0;
  136         r |= (l & O_EXCL) ? SVR4_O_EXCL : 0;
  137         r |= (l & O_NOCTTY) ? SVR4_O_NOCTTY : 0;
  138         return r;
  139 }
  140 
  141 
  142 static void
  143 bsd_to_svr4_flock(iflp, oflp)
  144         struct flock            *iflp;
  145         struct svr4_flock       *oflp;
  146 {
  147         switch (iflp->l_type) {
  148         case F_RDLCK:
  149                 oflp->l_type = SVR4_F_RDLCK;
  150                 break;
  151         case F_WRLCK:
  152                 oflp->l_type = SVR4_F_WRLCK;
  153                 break;
  154         case F_UNLCK:
  155                 oflp->l_type = SVR4_F_UNLCK;
  156                 break;
  157         default:
  158                 oflp->l_type = -1;
  159                 break;
  160         }
  161 
  162         oflp->l_whence = (short) iflp->l_whence;
  163         oflp->l_start = (svr4_off_t) iflp->l_start;
  164         oflp->l_len = (svr4_off_t) iflp->l_len;
  165         oflp->l_sysid = 0;
  166         oflp->l_pid = (svr4_pid_t) iflp->l_pid;
  167 }
  168 
  169 
  170 static void
  171 svr4_to_bsd_flock(iflp, oflp)
  172         struct svr4_flock       *iflp;
  173         struct flock            *oflp;
  174 {
  175         switch (iflp->l_type) {
  176         case SVR4_F_RDLCK:
  177                 oflp->l_type = F_RDLCK;
  178                 break;
  179         case SVR4_F_WRLCK:
  180                 oflp->l_type = F_WRLCK;
  181                 break;
  182         case SVR4_F_UNLCK:
  183                 oflp->l_type = F_UNLCK;
  184                 break;
  185         default:
  186                 oflp->l_type = -1;
  187                 break;
  188         }
  189 
  190         oflp->l_whence = iflp->l_whence;
  191         oflp->l_start = (off_t) iflp->l_start;
  192         oflp->l_len = (off_t) iflp->l_len;
  193         oflp->l_pid = (pid_t) iflp->l_pid;
  194         oflp->l_sysid = iflp->l_sysid;
  195 }
  196 
  197 static void
  198 bsd_to_svr4_flock64(iflp, oflp)
  199         struct flock            *iflp;
  200         struct svr4_flock64     *oflp;
  201 {
  202         switch (iflp->l_type) {
  203         case F_RDLCK:
  204                 oflp->l_type = SVR4_F_RDLCK;
  205                 break;
  206         case F_WRLCK:
  207                 oflp->l_type = SVR4_F_WRLCK;
  208                 break;
  209         case F_UNLCK:
  210                 oflp->l_type = SVR4_F_UNLCK;
  211                 break;
  212         default:
  213                 oflp->l_type = -1;
  214                 break;
  215         }
  216 
  217         oflp->l_whence = (short) iflp->l_whence;
  218         oflp->l_start = (svr4_off64_t) iflp->l_start;
  219         oflp->l_len = (svr4_off64_t) iflp->l_len;
  220         oflp->l_sysid = iflp->l_sysid;
  221         oflp->l_pid = (svr4_pid_t) iflp->l_pid;
  222 }
  223 
  224 
  225 static void
  226 svr4_to_bsd_flock64(iflp, oflp)
  227         struct svr4_flock64     *iflp;
  228         struct flock            *oflp;
  229 {
  230         switch (iflp->l_type) {
  231         case SVR4_F_RDLCK:
  232                 oflp->l_type = F_RDLCK;
  233                 break;
  234         case SVR4_F_WRLCK:
  235                 oflp->l_type = F_WRLCK;
  236                 break;
  237         case SVR4_F_UNLCK:
  238                 oflp->l_type = F_UNLCK;
  239                 break;
  240         default:
  241                 oflp->l_type = -1;
  242                 break;
  243         }
  244 
  245         oflp->l_whence = iflp->l_whence;
  246         oflp->l_start = (off_t) iflp->l_start;
  247         oflp->l_len = (off_t) iflp->l_len;
  248         oflp->l_pid = (pid_t) iflp->l_pid;
  249 
  250 }
  251 
  252 
  253 static int
  254 fd_revoke(td, fd)
  255         struct thread *td;
  256         int fd;
  257 {
  258         struct vnode *vp;
  259         struct mount *mp;
  260         struct vattr vattr;
  261         int error, *retval;
  262 
  263         retval = td->td_retval;
  264         if ((error = fgetvp(td, fd, &vp)) != 0)
  265                 return (error);
  266 
  267         if (vp->v_type != VCHR && vp->v_type != VBLK) {
  268                 error = EINVAL;
  269                 goto out;
  270         }
  271 
  272 #ifdef MAC
  273         vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
  274         error = mac_vnode_check_revoke(td->td_ucred, vp);
  275         VOP_UNLOCK(vp, 0);
  276         if (error)
  277                 goto out;
  278 #endif
  279 
  280         if ((error = VOP_GETATTR(vp, &vattr, td->td_ucred)) != 0)
  281                 goto out;
  282 
  283         if (td->td_ucred->cr_uid != vattr.va_uid &&
  284             (error = priv_check(td, PRIV_VFS_ADMIN)) != 0)
  285                 goto out;
  286 
  287         if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
  288                 goto out;
  289         if (vcount(vp) > 1)
  290                 VOP_REVOKE(vp, REVOKEALL);
  291         vn_finished_write(mp);
  292 out:
  293         vrele(vp);
  294         return error;
  295 }
  296 
  297 
  298 static int
  299 fd_truncate(td, fd, flp)
  300         struct thread *td;
  301         int fd;
  302         struct flock *flp;
  303 {
  304         off_t start, length;
  305         struct file *fp;
  306         struct vnode *vp;
  307         struct vattr vattr;
  308         int error, *retval;
  309         struct ftruncate_args ft;
  310 
  311         retval = td->td_retval;
  312 
  313         /*
  314          * We only support truncating the file.
  315          */
  316         if ((error = fget(td, fd, &fp)) != 0)
  317                 return (error);
  318 
  319         vp = fp->f_vnode;
  320 
  321         if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
  322                 fdrop(fp, td);
  323                 return ESPIPE;
  324         }
  325 
  326         if ((error = VOP_GETATTR(vp, &vattr, td->td_ucred)) != 0) {
  327                 fdrop(fp, td);
  328                 return error;
  329         }
  330 
  331         length = vattr.va_size;
  332 
  333         switch (flp->l_whence) {
  334         case SEEK_CUR:
  335                 start = fp->f_offset + flp->l_start;
  336                 break;
  337 
  338         case SEEK_END:
  339                 start = flp->l_start + length;
  340                 break;
  341 
  342         case SEEK_SET:
  343                 start = flp->l_start;
  344                 break;
  345 
  346         default:
  347                 fdrop(fp, td);
  348                 return EINVAL;
  349         }
  350 
  351         if (start + flp->l_len < length) {
  352                 /* We don't support free'ing in the middle of the file */
  353                 fdrop(fp, td);
  354                 return EINVAL;
  355         }
  356 
  357         ft.fd = fd;
  358         ft.length = start;
  359 
  360         error = ftruncate(td, &ft);
  361 
  362         fdrop(fp, td);
  363         return (error);
  364 }
  365 
  366 int
  367 svr4_sys_open(td, uap)
  368         struct thread *td;
  369         struct svr4_sys_open_args *uap;
  370 {
  371         struct proc *p = td->td_proc;
  372         char *newpath;
  373         int bsd_flags, error, retval;
  374 
  375         CHECKALTEXIST(td, uap->path, &newpath);
  376 
  377         bsd_flags = svr4_to_bsd_flags(uap->flags);
  378         error = kern_open(td, newpath, UIO_SYSSPACE, bsd_flags, uap->mode);
  379         free(newpath, M_TEMP);
  380 
  381         if (error) {
  382           /*            uprintf("svr4_open(%s, 0x%0x, 0%o): %d\n", uap->path,
  383                         uap->flags, uap->mode, error);*/
  384                 return error;
  385         }
  386 
  387         retval = td->td_retval[0];
  388 
  389         PROC_LOCK(p);
  390         if (!(bsd_flags & O_NOCTTY) && SESS_LEADER(p) &&
  391             !(p->p_flag & P_CONTROLT)) {
  392 #if defined(NOTYET)
  393                 struct file     *fp;
  394 
  395                 error = fget(td, retval, &fp);
  396                 PROC_UNLOCK(p);
  397                 /*
  398                  * we may have lost a race the above open() and
  399                  * another thread issuing a close()
  400                  */
  401                 if (error) 
  402                         return (EBADF); /* XXX: correct errno? */
  403                 /* ignore any error, just give it a try */
  404                 if (fp->f_type == DTYPE_VNODE)
  405                         fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0, td->td_ucred,
  406                             td);
  407                 fdrop(fp, td);
  408         } else {
  409                 PROC_UNLOCK(p);
  410         }
  411 #else
  412         }
  413         PROC_UNLOCK(p);
  414 #endif
  415         return error;
  416 }
  417 
  418 int
  419 svr4_sys_open64(td, uap)
  420         struct thread *td;
  421         struct svr4_sys_open64_args *uap;
  422 {
  423         return svr4_sys_open(td, (struct svr4_sys_open_args *)uap);
  424 }
  425 
  426 int
  427 svr4_sys_creat(td, uap)
  428         struct thread *td;
  429         struct svr4_sys_creat_args *uap;
  430 {
  431         char *newpath;
  432         int error;
  433 
  434         CHECKALTEXIST(td, uap->path, &newpath);
  435 
  436         error = kern_open(td, newpath, UIO_SYSSPACE, O_WRONLY | O_CREAT |
  437             O_TRUNC, uap->mode);
  438         free(newpath, M_TEMP);
  439         return (error);
  440 }
  441 
  442 int
  443 svr4_sys_creat64(td, uap)
  444         struct thread *td;
  445         struct svr4_sys_creat64_args *uap;
  446 {
  447         return svr4_sys_creat(td, (struct svr4_sys_creat_args *)uap);
  448 }
  449 
  450 int
  451 svr4_sys_llseek(td, uap)
  452         struct thread *td;
  453         struct svr4_sys_llseek_args *uap;
  454 {
  455         struct lseek_args ap;
  456 
  457         ap.fd = uap->fd;
  458 
  459 #if BYTE_ORDER == BIG_ENDIAN
  460         ap.offset = (((u_int64_t) uap->offset1) << 32) | 
  461                 uap->offset2;
  462 #else
  463         ap.offset = (((u_int64_t) uap->offset2) << 32) | 
  464                 uap->offset1;
  465 #endif
  466         ap.whence = uap->whence;
  467 
  468         return lseek(td, &ap);
  469 }
  470 
  471 int
  472 svr4_sys_access(td, uap)
  473         struct thread *td;
  474         struct svr4_sys_access_args *uap;
  475 {
  476         char *newpath;
  477         int error;
  478 
  479         CHECKALTEXIST(td, uap->path, &newpath);
  480         error = kern_access(td, newpath, UIO_SYSSPACE, uap->flags);
  481         free(newpath, M_TEMP);
  482         return (error);
  483 }
  484 
  485 #if defined(NOTYET)
  486 int
  487 svr4_sys_pread(td, uap)
  488         struct thread *td;
  489         struct svr4_sys_pread_args *uap;
  490 {
  491         struct pread_args pra;
  492 
  493         /*
  494          * Just translate the args structure and call the NetBSD
  495          * pread(2) system call (offset type is 64-bit in NetBSD).
  496          */
  497         pra.fd = uap->fd;
  498         pra.buf = uap->buf;
  499         pra.nbyte = uap->nbyte;
  500         pra.offset = uap->off;
  501 
  502         return pread(td, &pra);
  503 }
  504 #endif
  505 
  506 #if defined(NOTYET)
  507 int
  508 svr4_sys_pread64(td, v, retval)
  509         struct thread *td;
  510         void *v; 
  511         register_t *retval;
  512 {
  513 
  514         struct svr4_sys_pread64_args *uap = v;
  515         struct sys_pread_args pra;
  516 
  517         /*
  518          * Just translate the args structure and call the NetBSD
  519          * pread(2) system call (offset type is 64-bit in NetBSD).
  520          */
  521         pra.fd = uap->fd;
  522         pra.buf = uap->buf;
  523         pra.nbyte = uap->nbyte;
  524         pra.offset = uap->off;
  525 
  526         return (sys_pread(td, &pra, retval));
  527 }
  528 #endif /* NOTYET */
  529 
  530 #if defined(NOTYET)
  531 int
  532 svr4_sys_pwrite(td, uap)
  533         struct thread *td;
  534         struct svr4_sys_pwrite_args *uap;
  535 {
  536         struct pwrite_args pwa;
  537 
  538         /*
  539          * Just translate the args structure and call the NetBSD
  540          * pwrite(2) system call (offset type is 64-bit in NetBSD).
  541          */
  542         pwa.fd = uap->fd;
  543         pwa.buf = uap->buf;
  544         pwa.nbyte = uap->nbyte;
  545         pwa.offset = uap->off;
  546 
  547         return pwrite(td, &pwa);
  548 }
  549 #endif
  550 
  551 #if defined(NOTYET)
  552 int
  553 svr4_sys_pwrite64(td, v, retval)
  554         struct thread *td;
  555         void *v; 
  556         register_t *retval;
  557 {
  558         struct svr4_sys_pwrite64_args *uap = v;
  559         struct sys_pwrite_args pwa;
  560 
  561         /*
  562          * Just translate the args structure and call the NetBSD
  563          * pwrite(2) system call (offset type is 64-bit in NetBSD).
  564          */
  565         pwa.fd = uap->fd;
  566         pwa.buf = uap->buf;
  567         pwa.nbyte = uap->nbyte;
  568         pwa.offset = uap->off;
  569 
  570         return (sys_pwrite(td, &pwa, retval));
  571 }
  572 #endif /* NOTYET */
  573 
  574 int
  575 svr4_sys_fcntl(td, uap)
  576         struct thread *td;
  577         struct svr4_sys_fcntl_args *uap;
  578 {
  579         int cmd, error, *retval;
  580 
  581         retval = td->td_retval;
  582 
  583         cmd = svr4_to_bsd_cmd(uap->cmd);
  584 
  585         switch (cmd) {
  586         case F_DUPFD:
  587         case F_DUP2FD:
  588         case F_GETFD:
  589         case F_SETFD:
  590                 return (kern_fcntl(td, uap->fd, cmd, (intptr_t)uap->arg));
  591 
  592         case F_GETFL:
  593                 error = kern_fcntl(td, uap->fd, cmd, (intptr_t)uap->arg);
  594                 if (error)
  595                         return (error);
  596                 *retval = bsd_to_svr4_flags(*retval);
  597                 return (error);
  598 
  599         case F_SETFL:
  600                 {
  601                         /*
  602                          * we must save the O_ASYNC flag, as that is
  603                          * handled by ioctl(_, I_SETSIG, _) emulation.
  604                          */
  605                         int flags;
  606 
  607                         DPRINTF(("Setting flags %p\n", uap->arg));
  608 
  609                         error = kern_fcntl(td, uap->fd, F_GETFL, 0);
  610                         if (error)
  611                                 return (error);
  612                         flags = *retval;
  613                         flags &= O_ASYNC;
  614                         flags |= svr4_to_bsd_flags((u_long) uap->arg);
  615                         return (kern_fcntl(td, uap->fd, F_SETFL, flags));
  616                 }
  617 
  618         case F_GETLK:
  619         case F_SETLK:
  620         case F_SETLKW:
  621                 {
  622                         struct svr4_flock       ifl;
  623                         struct flock            fl;
  624 
  625                         error = copyin(uap->arg, &ifl, sizeof (ifl));
  626                         if (error)
  627                                 return (error);
  628 
  629                         svr4_to_bsd_flock(&ifl, &fl);
  630 
  631                         error = kern_fcntl(td, uap->fd, cmd, (intptr_t)&fl);
  632                         if (error || cmd != F_GETLK)
  633                                 return (error);
  634 
  635                         bsd_to_svr4_flock(&fl, &ifl);
  636 
  637                         return (copyout(&ifl, uap->arg, sizeof (ifl)));
  638                 }
  639         case -1:
  640                 switch (uap->cmd) {
  641                 case SVR4_F_FREESP:
  642                         {
  643                                 struct svr4_flock        ifl;
  644                                 struct flock             fl;
  645 
  646                                 error = copyin(uap->arg, &ifl,
  647                                     sizeof ifl);
  648                                 if (error)
  649                                         return error;
  650                                 svr4_to_bsd_flock(&ifl, &fl);
  651                                 return fd_truncate(td, uap->fd, &fl);
  652                         }
  653 
  654                 case SVR4_F_GETLK64:
  655                 case SVR4_F_SETLK64:
  656                 case SVR4_F_SETLKW64:
  657                         {
  658                                 struct svr4_flock64     ifl;
  659                                 struct flock            fl;
  660 
  661                                 switch (uap->cmd) {
  662                                 case SVR4_F_GETLK64:
  663                                         cmd = F_GETLK;
  664                                         break;
  665                                 case SVR4_F_SETLK64:
  666                                         cmd = F_SETLK;
  667                                         break;                                  
  668                                 case SVR4_F_SETLKW64:
  669                                         cmd = F_SETLKW;
  670                                         break;
  671                                 }
  672                                 error = copyin(uap->arg, &ifl,
  673                                     sizeof (ifl));
  674                                 if (error)
  675                                         return (error);
  676 
  677                                 svr4_to_bsd_flock64(&ifl, &fl);
  678 
  679                                 error = kern_fcntl(td, uap->fd, cmd,
  680                                     (intptr_t)&fl);
  681                                 if (error || cmd != F_GETLK)
  682                                         return (error);
  683 
  684                                 bsd_to_svr4_flock64(&fl, &ifl);
  685 
  686                                 return (copyout(&ifl, uap->arg,
  687                                     sizeof (ifl)));
  688                         }
  689 
  690                 case SVR4_F_FREESP64:
  691                         {
  692                                 struct svr4_flock64      ifl;
  693                                 struct flock             fl;
  694 
  695                                 error = copyin(uap->arg, &ifl,
  696                                     sizeof ifl);
  697                                 if (error)
  698                                         return error;
  699                                 svr4_to_bsd_flock64(&ifl, &fl);
  700                                 return fd_truncate(td, uap->fd, &fl);
  701                         }
  702 
  703                 case SVR4_F_REVOKE:
  704                         return fd_revoke(td, uap->fd);
  705 
  706                 default:
  707                         return ENOSYS;
  708                 }
  709 
  710         default:
  711                 return ENOSYS;
  712         }
  713 }
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FreeBSD/Linux Kernel Cross Reference sys/compat/svr4/svr4_fcntl.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/svr4/svr4_fcntl.c
