svr4_filio.c

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    1 /*
    2  * Copyright (c) 1998 Mark Newton
    3  * Copyright (c) 1994 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. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  * 
   28  * $FreeBSD: releng/5.0/sys/compat/svr4/svr4_filio.c 108086 2002-12-19 09:40:13Z alfred $
   29  */
   30 
   31 #include <sys/param.h>
   32 #include <sys/proc.h>
   33 #include <sys/systm.h>
   34 #include <sys/file.h>
   35 #include <sys/filio.h>
   36 #include <sys/lock.h>
   37 #include <sys/signal.h>
   38 #include <sys/filedesc.h>
   39 #include <sys/poll.h>
   40 #include <sys/malloc.h>
   41 #include <sys/mutex.h>
   42 
   43 #include <sys/sysproto.h>
   44 
   45 #include <compat/svr4/svr4.h>
   46 #include <compat/svr4/svr4_types.h>
   47 #include <compat/svr4/svr4_util.h>
   48 #include <compat/svr4/svr4_signal.h>
   49 #include <compat/svr4/svr4_proto.h>
   50 #include <compat/svr4/svr4_ioctl.h>
   51 #include <compat/svr4/svr4_filio.h>
   52 
   53 /*#define GROTTY_READ_HACK*/
   54 
   55 int
   56 svr4_sys_poll(td, uap)
   57      struct thread *td;
   58      struct svr4_sys_poll_args *uap;
   59 {
   60      int error;
   61      struct poll_args pa;
   62      struct pollfd *pfd;
   63      int idx = 0, cerr;
   64      u_long siz;
   65 
   66      pa.fds = uap->fds;
   67      pa.nfds = uap->nfds;
   68      pa.timeout = uap->timeout;
   69 
   70      siz = uap->nfds * sizeof(struct pollfd);
   71      pfd = (struct pollfd *)malloc(siz, M_TEMP, M_WAITOK);
   72 
   73      error = poll(td, (struct poll_args *)uap);
   74 
   75      if ((cerr = copyin(uap->fds, pfd, siz)) != 0) {
   76        error = cerr;
   77        goto done;
   78      }
   79 
   80      for (idx = 0; idx < uap->nfds; idx++) {
   81        /* POLLWRNORM already equals POLLOUT, so we don't worry about that */
   82        if (pfd[idx].revents & (POLLOUT | POLLWRNORM | POLLWRBAND))
   83             pfd[idx].revents |= (POLLOUT | POLLWRNORM | POLLWRBAND);
   84      }
   85      if ((cerr = copyout(pfd, uap->fds, siz)) != 0) {
   86        error = cerr;
   87        goto done;   /* yeah, I know it's the next line, but this way I won't
   88                        forget to update it if I add more code */
   89      }
   90 done:
   91      free(pfd, M_TEMP);
   92      return error;
   93 }
   94 
   95 #if defined(READ_TEST)
   96 int
   97 svr4_sys_read(td, uap)
   98      struct thread *td;
   99      struct svr4_sys_read_args *uap;
  100 {
  101      struct read_args ra;
  102      struct file *fp;
  103      struct socket *so = NULL;
  104      int so_state;
  105      sigset_t sigmask;
  106      int rv;
  107 
  108      ra.fd = uap->fd;
  109      ra.buf = uap->buf;
  110      ra.nbyte = uap->nbyte;
  111 
  112      if (fget(td, uap->fd, &fp) != 0) {
  113        DPRINTF(("Something fishy with the user-supplied file descriptor...\n"));
  114        return EBADF;
  115      }
  116 
  117      if (fp->f_type == DTYPE_SOCKET) {
  118        so = (struct socket *)fp->f_data;
  119        DPRINTF(("fd %d is a socket\n", uap->fd));
  120        if (so->so_state & SS_ASYNC) {
  121          DPRINTF(("fd %d is an ASYNC socket!\n", uap->fd));
  122        }
  123        DPRINTF(("Here are its flags: 0x%x\n", so->so_state));
  124 #if defined(GROTTY_READ_HACK)
  125        so_state = so->so_state;
  126        so->so_state &= ~SS_NBIO;
  127 #endif
  128      }
  129 
  130      rv = read(td, &ra);
  131 
  132      DPRINTF(("svr4_read(%d, 0x%0x, %d) = %d\n", 
  133              uap->fd, uap->buf, uap->nbyte, rv));
  134      if (rv == EAGAIN) {
  135        DPRINTF(("sigmask = 0x%x\n", td->td_proc->p_sigmask));
  136        DPRINTF(("sigignore = 0x%x\n", td->td_proc->p_sigignore));
  137        DPRINTF(("sigcaught = 0x%x\n", td->td_proc->p_sigcatch));
  138        DPRINTF(("siglist = 0x%x\n", td->td_proc->p_siglist));
  139      }
  140 
  141 #if defined(GROTTY_READ_HACK)
  142      if (so) {  /* We've already checked to see if this is a socket */
  143        so->so_state = so_state;
  144      }
  145 #endif
  146      fdrop(fp, td);
  147 
  148      return(rv);
  149 }
  150 #endif /* READ_TEST */
  151 
  152 #if defined(BOGUS)
  153 int
  154 svr4_sys_write(td, uap)
  155      struct thread *td;
  156      struct svr4_sys_write_args *uap;
  157 {
  158      struct write_args wa;
  159      struct file *fp;
  160      int rv;
  161 
  162      wa.fd = uap->fd;
  163      wa.buf = uap->buf;
  164      wa.nbyte = uap->nbyte;
  165 
  166      rv = write(td, &wa);
  167 
  168      DPRINTF(("svr4_write(%d, 0x%0x, %d) = %d\n", 
  169              uap->fd, uap->buf, uap->nbyte, rv));
  170 
  171      return(rv);
  172 }
  173 #endif /* BOGUS */
  174 
  175 int
  176 svr4_fil_ioctl(fp, td, retval, fd, cmd, data)
  177         struct file *fp;
  178         struct thread *td;
  179         register_t *retval;
  180         int fd;
  181         u_long cmd;
  182         caddr_t data;
  183 {
  184         int error;
  185         int num;
  186         struct filedesc *fdp = td->td_proc->p_fd;
  187 
  188         *retval = 0;
  189 
  190         FILEDESC_LOCK(fdp);
  191         switch (cmd) {
  192         case SVR4_FIOCLEX:
  193                 fdp->fd_ofileflags[fd] |= UF_EXCLOSE;
  194                 FILEDESC_UNLOCK(fdp);
  195                 return 0;
  196 
  197         case SVR4_FIONCLEX:
  198                 fdp->fd_ofileflags[fd] &= ~UF_EXCLOSE;
  199                 FILEDESC_UNLOCK(fdp);
  200                 return 0;
  201 
  202         case SVR4_FIOGETOWN:
  203         case SVR4_FIOSETOWN:
  204         case SVR4_FIOASYNC:
  205         case SVR4_FIONBIO:
  206         case SVR4_FIONREAD:
  207                 FILEDESC_UNLOCK(fdp);
  208                 if ((error = copyin(data, &num, sizeof(num))) != 0)
  209                         return error;
  210 
  211                 switch (cmd) {
  212                 case SVR4_FIOGETOWN:    cmd = FIOGETOWN; break;
  213                 case SVR4_FIOSETOWN:    cmd = FIOSETOWN; break;
  214                 case SVR4_FIOASYNC:     cmd = FIOASYNC;  break;
  215                 case SVR4_FIONBIO:      cmd = FIONBIO;   break;
  216                 case SVR4_FIONREAD:     cmd = FIONREAD;  break;
  217                 }
  218 
  219 #ifdef SVR4_DEBUG
  220                 if (cmd == FIOASYNC) DPRINTF(("FIOASYNC\n"));
  221 #endif
  222                 error = fo_ioctl(fp, cmd, (caddr_t) &num, td->td_ucred, td);
  223 
  224                 if (error)
  225                         return error;
  226 
  227                 return copyout(&num, data, sizeof(num));
  228 
  229         default:
  230                 FILEDESC_UNLOCK(fdp);
  231                 DPRINTF(("Unknown svr4 filio %lx\n", cmd));
  232                 return 0;       /* ENOSYS really */
  233         }
  234 }

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FreeBSD/Linux Kernel Cross Reference sys/compat/svr4/svr4_filio.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/svr4/svr4_filio.c