ibcs2_fcntl.c

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    1 /*      $NetBSD: ibcs2_fcntl.c,v 1.34 2008/03/21 21:54:58 ad Exp $      */
    2 
    3 /*
    4  * Copyright (c) 1995 Scott Bartram
    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  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. The name of the author may not be used to endorse or promote products
   16  *    derived from this software without specific prior written permission
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __KERNEL_RCSID(0, "$NetBSD: ibcs2_fcntl.c,v 1.34 2008/03/21 21:54:58 ad Exp $");
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/namei.h>
   36 #include <sys/proc.h>
   37 #include <sys/file.h>
   38 #include <sys/stat.h>
   39 #include <sys/filedesc.h>
   40 #include <sys/ioctl.h>
   41 #include <sys/kernel.h>
   42 #include <sys/mount.h>
   43 #include <sys/syscallargs.h>
   44 #include <sys/vnode.h>
   45 #include <sys/kauth.h>
   46 
   47 #include <compat/ibcs2/ibcs2_types.h>
   48 #include <compat/ibcs2/ibcs2_fcntl.h>
   49 #include <compat/ibcs2/ibcs2_unistd.h>
   50 #include <compat/ibcs2/ibcs2_signal.h>
   51 #include <compat/ibcs2/ibcs2_syscallargs.h>
   52 #include <compat/ibcs2/ibcs2_util.h>
   53 
   54 static int cvt_o_flags(int);
   55 static void cvt_flock2iflock(struct flock *, struct ibcs2_flock *);
   56 static void cvt_iflock2flock(struct ibcs2_flock *, struct flock *);
   57 static int ioflags2oflags(int);
   58 static int oflags2ioflags(int);
   59 
   60 static int
   61 cvt_o_flags(int flags)
   62 {
   63         int r = 0;
   64 
   65         /* convert mode into NetBSD mode */
   66         if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
   67         if (flags & IBCS2_O_RDWR) r |= O_RDWR;
   68         if (flags & (IBCS2_O_NDELAY | IBCS2_O_NONBLOCK)) r |= O_NONBLOCK;
   69         if (flags & IBCS2_O_APPEND) r |= O_APPEND;
   70         if (flags & IBCS2_O_SYNC) r |= O_FSYNC;
   71         if (flags & IBCS2_O_CREAT) r |= O_CREAT;
   72         if (flags & IBCS2_O_TRUNC) r |= O_TRUNC;
   73         if (flags & IBCS2_O_EXCL) r |= O_EXCL;
   74         return r;
   75 }
   76 
   77 static void
   78 cvt_flock2iflock(struct flock *flp, struct ibcs2_flock *iflp)
   79 {
   80         switch (flp->l_type) {
   81         case F_RDLCK:
   82                 iflp->l_type = IBCS2_F_RDLCK;
   83                 break;
   84         case F_WRLCK:
   85                 iflp->l_type = IBCS2_F_WRLCK;
   86                 break;
   87         case F_UNLCK:
   88                 iflp->l_type = IBCS2_F_UNLCK;
   89                 break;
   90         }
   91         iflp->l_whence = (short)flp->l_whence;
   92         iflp->l_start = (ibcs2_off_t)flp->l_start;
   93         iflp->l_len = (ibcs2_off_t)flp->l_len;
   94         iflp->l_sysid = 0;
   95         iflp->l_pid = (ibcs2_pid_t)flp->l_pid;
   96 }
   97 
   98 static void
   99 cvt_iflock2flock(struct ibcs2_flock *iflp, struct flock *flp)
  100 {
  101         flp->l_start = (off_t)iflp->l_start;
  102         flp->l_len = (off_t)iflp->l_len;
  103         flp->l_pid = (pid_t)iflp->l_pid;
  104         switch (iflp->l_type) {
  105         case IBCS2_F_RDLCK:
  106                 flp->l_type = F_RDLCK;
  107                 break;
  108         case IBCS2_F_WRLCK:
  109                 flp->l_type = F_WRLCK;
  110                 break;
  111         case IBCS2_F_UNLCK:
  112                 flp->l_type = F_UNLCK;
  113                 break;
  114         }
  115         flp->l_whence = iflp->l_whence;
  116 }
  117 
  118 /* convert iBCS2 mode into NetBSD mode */
  119 static int
  120 ioflags2oflags(int flags)
  121 {
  122         int r = 0;
  123 
  124         if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
  125         if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
  126         if (flags & IBCS2_O_RDWR) r |= O_RDWR;
  127         if (flags & IBCS2_O_NDELAY) r |= O_NONBLOCK;
  128         if (flags & IBCS2_O_APPEND) r |= O_APPEND;
  129         if (flags & IBCS2_O_SYNC) r |= O_FSYNC;
  130         if (flags & IBCS2_O_NONBLOCK) r |= O_NONBLOCK;
  131         if (flags & IBCS2_O_CREAT) r |= O_CREAT;
  132         if (flags & IBCS2_O_TRUNC) r |= O_TRUNC;
  133         if (flags & IBCS2_O_EXCL) r |= O_EXCL;
  134         if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
  135         return r;
  136 }
  137 
  138 /* convert NetBSD mode into iBCS2 mode */
  139 static int
  140 oflags2ioflags(int flags)
  141 {
  142         int r = 0;
  143 
  144         if (flags & O_RDONLY) r |= IBCS2_O_RDONLY;
  145         if (flags & O_WRONLY) r |= IBCS2_O_WRONLY;
  146         if (flags & O_RDWR) r |= IBCS2_O_RDWR;
  147         if (flags & O_NDELAY) r |= IBCS2_O_NONBLOCK;
  148         if (flags & O_APPEND) r |= IBCS2_O_APPEND;
  149         if (flags & O_FSYNC) r |= IBCS2_O_SYNC;
  150         if (flags & O_NONBLOCK) r |= IBCS2_O_NONBLOCK;
  151         if (flags & O_CREAT) r |= IBCS2_O_CREAT;
  152         if (flags & O_TRUNC) r |= IBCS2_O_TRUNC;
  153         if (flags & O_EXCL) r |= IBCS2_O_EXCL;
  154         if (flags & O_NOCTTY) r |= IBCS2_O_NOCTTY;
  155         return r;
  156 }
  157 
  158 int
  159 ibcs2_sys_open(struct lwp *l, const struct ibcs2_sys_open_args *uap, register_t *retval)
  160 {
  161         /* {
  162                 syscallarg(char *) path;
  163                 syscallarg(int) flags;
  164                 syscallarg(int) mode;
  165         } */
  166         struct proc *p = l->l_proc;
  167         struct sys_open_args bsd_ua;
  168         int noctty = SCARG(uap, flags) & IBCS2_O_NOCTTY;
  169         int ret;
  170 
  171         SCARG(&bsd_ua, path) = SCARG(uap, path);
  172         SCARG(&bsd_ua, flags) = cvt_o_flags(SCARG(uap, flags));
  173         SCARG(&bsd_ua, mode) = SCARG(uap, mode);
  174         ret = sys_open(l, &bsd_ua, retval);
  175 
  176         if (!ret && !noctty && SESS_LEADER(p) && !(p->p_lflag & PL_CONTROLT)) {
  177                 file_t *fp;
  178 
  179                 if ((fp = fd_getfile(*retval)) != NULL) {
  180                         /* ignore any error, just give it a try */
  181                         if (fp->f_type == DTYPE_VNODE)
  182                                 (fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, NULL);
  183                         fd_putfile(*retval);
  184                 }
  185         }
  186         return ret;
  187 }
  188 
  189 int
  190 ibcs2_sys_creat(struct lwp *l, const struct ibcs2_sys_creat_args *uap, register_t *retval)
  191 {
  192         /* {
  193                 syscallarg(char *) path;
  194                 syscallarg(int) mode;
  195         } */
  196         struct sys_open_args cup;
  197 
  198         SCARG(&cup, path) = SCARG(uap, path);
  199         SCARG(&cup, mode) = SCARG(uap, mode);
  200         SCARG(&cup, flags) = O_WRONLY | O_CREAT | O_TRUNC;
  201         return sys_open(l, &cup, retval);
  202 }
  203 
  204 int
  205 ibcs2_sys_access(struct lwp *l, const struct ibcs2_sys_access_args *uap, register_t *retval)
  206 {
  207         /* {
  208                 syscallarg(char *) path;
  209                 syscallarg(int) flags;
  210         } */
  211         struct sys_access_args cup;
  212 
  213         SCARG(&cup, path) = SCARG(uap, path);
  214         SCARG(&cup, flags) = SCARG(uap, flags);
  215         return sys_access(l, &cup, retval);
  216 }
  217 
  218 int
  219 ibcs2_sys_eaccess(struct lwp *l, const struct ibcs2_sys_eaccess_args *uap, register_t *retval)
  220 {
  221         /* {
  222                 syscallarg(char *) path;
  223                 syscallarg(int) flags;
  224         } */
  225         struct vnode *vp;
  226         int error, flags;
  227         struct nameidata nd;
  228 
  229         NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | TRYEMULROOT, UIO_USERSPACE,
  230             SCARG(uap, path));
  231         if ((error = namei(&nd)) != 0)
  232                 return error;
  233         vp = nd.ni_vp;
  234 
  235         /* Flags == 0 means only check for existence. */
  236         if (SCARG(uap, flags)) {
  237                 flags = 0;
  238                 if (SCARG(uap, flags) & IBCS2_R_OK)
  239                         flags |= VREAD;
  240                 if (SCARG(uap, flags) & IBCS2_W_OK)
  241                         flags |= VWRITE;
  242                 if (SCARG(uap, flags) & IBCS2_X_OK)
  243                         flags |= VEXEC;
  244                 if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
  245                         error = VOP_ACCESS(vp, flags, l->l_cred);
  246         }
  247         vput(vp);
  248         return error;
  249 }
  250 
  251 int
  252 ibcs2_sys_fcntl(struct lwp *l, const struct ibcs2_sys_fcntl_args *uap, register_t *retval)
  253 {
  254         /* {
  255                 syscallarg(int) fd;
  256                 syscallarg(int) cmd;
  257                 syscallarg(char *) arg;
  258         } */
  259         struct sys_fcntl_args fa;
  260         struct flock fl;
  261         struct ibcs2_flock ifl;
  262         int error;
  263         int cmd;
  264 
  265         switch(SCARG(uap, cmd)) {
  266         case IBCS2_F_DUPFD:
  267                 SCARG(&fa, fd) = SCARG(uap, fd);
  268                 SCARG(&fa, cmd) = F_DUPFD;
  269                 SCARG(&fa, arg) = SCARG(uap, arg);
  270                 return sys_fcntl(l, &fa, retval);
  271         case IBCS2_F_GETFD:
  272                 SCARG(&fa, fd) = SCARG(uap, fd);
  273                 SCARG(&fa, cmd) = F_GETFD;
  274                 SCARG(&fa, arg) = SCARG(uap, arg);
  275                 return sys_fcntl(l, &fa, retval);
  276         case IBCS2_F_SETFD:
  277                 SCARG(&fa, fd) = SCARG(uap, fd);
  278                 SCARG(&fa, cmd) = F_SETFD;
  279                 SCARG(&fa, arg) = SCARG(uap, arg);
  280                 return sys_fcntl(l, &fa, retval);
  281         case IBCS2_F_GETFL:
  282                 SCARG(&fa, fd) = SCARG(uap, fd);
  283                 SCARG(&fa, cmd) = F_GETFL;
  284                 SCARG(&fa, arg) = SCARG(uap, arg);
  285                 error = sys_fcntl(l, &fa, retval);
  286                 if (error)
  287                         return error;
  288                 *retval = oflags2ioflags(*retval);
  289                 return error;
  290         case IBCS2_F_SETFL:
  291                 SCARG(&fa, fd) = SCARG(uap, fd);
  292                 SCARG(&fa, cmd) = F_SETFL;
  293                 SCARG(&fa, arg) = (void *)ioflags2oflags((int) SCARG(uap, arg));
  294                 return sys_fcntl(l, &fa, retval);
  295 
  296         case IBCS2_F_GETLK:
  297                 cmd = F_GETLK;
  298                 goto lock;
  299         case IBCS2_F_SETLK:
  300                 cmd = F_SETLK;
  301                 goto lock;
  302         case IBCS2_F_SETLKW:
  303                 cmd = F_SETLKW;
  304             lock:
  305                 error = copyin(SCARG(uap, arg), &ifl, ibcs2_flock_len);
  306                 if (error)
  307                         return error;
  308                 cvt_iflock2flock(&ifl, &fl);
  309                 error = do_fcntl_lock(SCARG(uap, fd), cmd, &fl);
  310                 if (cmd != F_GETLK || error != 0)
  311                         return error;
  312                 cvt_flock2iflock(&fl, &ifl);
  313                 return copyout(&ifl, SCARG(uap, arg), ibcs2_flock_len);
  314 
  315         default:
  316                 return ENOSYS;
  317         }
  318 
  319 }
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FreeBSD/Linux Kernel Cross Reference sys/compat/ibcs2/ibcs2_fcntl.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/ibcs2/ibcs2_fcntl.c
