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- /*
- * This file is part of ixemul.library for the Amiga.
- * Copyright (C) 1991, 1992 Markus M. Wild
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * kern_descrip.c,v 1.1.1.1 1994/04/04 04:30:42 amiga Exp
- *
- * kern_descrip.c,v
- * Revision 1.1.1.1 1994/04/04 04:30:42 amiga
- * Initial CVS check in.
- *
- * Revision 1.2 1992/07/04 19:19:04 mwild
- * add support for F_INTERNALIZE/F_EXTERNALIZE, which are used by IXPIPE
- * and execve().
- *
- * Revision 1.1 1992/05/14 19:55:40 mwild
- * Initial revision
- *
- *
- * Since the code originated from Berkeley, the following copyright
- * header applies as well. The code has been changed, it's not the
- * original Berkeley code!
- */
-
- /*
- * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution is only permitted until one year after the first shipment
- * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
- * binary forms are permitted provided that: (1) source distributions retain
- * this entire copyright notice and comment, and (2) distributions including
- * binaries display the following acknowledgement: This product includes
- * software developed by the University of California, Berkeley and its
- * contributors'' in the documentation or other materials provided with the
- * distribution and in all advertising materials mentioning features or use
- * of this software. Neither the name of the University nor the names of
- * its contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * @(#)kern_descrip.c 7.16 (Berkeley) 6/28/90
- */
-
- #define _KERNEL
- #include "ixemul.h"
- #include "kprintf.h"
- #include <sys/socket.h>
- #include <sys/ioctl.h>
- #include <string.h>
-
- /*
- * Descriptor management.
- */
-
- /*
- * System calls on descriptors.
- */
- /* ARGSUSED */
- int
- getdtablesize (void)
- {
- return NOFILE;
- }
-
- /*
- * Duplicate a file descriptor.
- */
- /* ARGSUSED */
- int
- dup (unsigned i)
- {
- struct file *fp;
- int fd, error;
-
- if (i >= NOFILE || (fp = u.u_ofile[i]) == NULL)
- {
- errno = EBADF;
- KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
- return -1;
- }
-
- if ((error = ufalloc (0, &fd)))
- {
- errno = error;
- KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
- return -1;
- }
-
- u.u_ofile[fd] = fp;
- u.u_pofile[fd] = u.u_pofile[i] &~ UF_EXCLOSE;
- fp->f_count++;
-
- if (fd > u.u_lastfile) u.u_lastfile = fd;
-
- return fd;
- }
-
- /*
- * Duplicate a file descriptor to a particular value.
- */
- /* ARGSUSED */
- int
- dup2 (unsigned i, unsigned j)
- {
- register struct file *fp;
- int old_err;
-
- if (i >= NOFILE || (fp = u.u_ofile[i]) == NULL)
- {
- errno = EBADF;
- KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
- return -1;
- }
-
- if (j < 0 || j >= NOFILE)
- {
- errno = EBADF;
- KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
- return -1;
- }
-
- if (i == j) return (int)j;
-
- ix_lock_base ();
-
- old_err = errno;
- if (u.u_ofile[j] && u.u_ofile[j]->f_close)
- u.u_ofile[j]->f_close (u.u_ofile[j]);
-
- u.u_ofile[j] = fp;
- u.u_pofile[j] = u.u_pofile[i] &~ UF_EXCLOSE;
- fp->f_count++;
- if (j > u.u_lastfile)
- u.u_lastfile = j;
-
- ix_unlock_base ();
-
- /*
- * dup2() must suceed even though the close had an error.
- */
- errno = old_err; /* XXX */
- KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
- return (int)j;
- }
-
- /*
- * The file control system call.
- */
- /* ARGSUSED */
- int
- fcntl(int fdes, int cmd, int arg)
- {
- register struct file *fp;
- register char *pop;
- int i, error;
-
- /* F_INTERNALIZE doesn't need a valid descriptor. Check for this first */
- if (cmd == F_INTERNALIZE)
- {
- if ((error = ufalloc (0, &i)))
- {
- errno = error;
- KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
- return -1;
- }
- fp = (struct file *) arg;
- u.u_ofile[i] = fp;
- u.u_pofile[i] = 0;
- fp->f_count++;
- return i;
- }
-
-
- if (fdes >= NOFILE || (fp = u.u_ofile[fdes]) == NULL)
- {
- errno = EBADF;
- KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
- return -1;
- }
-
- pop = &u.u_pofile[fdes];
- switch (cmd)
- {
- case F_DUPFD:
- if (arg < 0 || arg >= NOFILE)
- {
- errno = EINVAL;
- KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
- return -1;
- }
- if ((error = ufalloc (arg, &i)))
- {
- errno = error;
- KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
- return -1;
- }
- ix_lock_base ();
- u.u_ofile[i] = fp;
- u.u_pofile[i] = *pop &~ UF_EXCLOSE;
- fp->f_count++;
- ix_unlock_base ();
- if (i > u.u_lastfile) u.u_lastfile = i;
- return i;
-
- case F_GETFD:
- return *pop & 1;
-
- case F_SETFD:
- *pop = (*pop &~ 1) | (arg & 1);
- return 0;
-
- case F_GETFL:
- return OFLAGS(fp->f_flags);
-
- case F_SETFL:
- fp->f_flags &= ~FCNTLFLAGS;
- fp->f_flags |= FFLAGS(arg) & FCNTLFLAGS;
- if (fp->f_type == DTYPE_SOCKET)
- {
- arg = (fp->f_flags & FASYNC) ? 1 : 0;
- ioctl(fdes, FIOASYNC, &arg);
- arg = (fp->f_flags & FNONBLOCK) ? 1 : 0;
- ioctl(fdes, FIONBIO, &arg);
- }
- return 0;
-
- case F_EXTERNALIZE:
- return (int)fp;
-
- default:
- errno = EINVAL;
- KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
- return -1;
- }
- /* NOTREACHED */
- }
-
- /*
- * Return status information about a file descriptor.
- */
- /* ARGSUSED */
- int
- fstat (int fdes, struct stat *sb)
- {
- struct file *fp;
-
- if (fdes >= NOFILE || (fp = u.u_ofile[fdes]) == NULL)
- {
- KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
- errno = EBADF;
- return -1;
- }
-
- /* I found this code from the AmiTCP sdk. It *should* work with AS225 */
- if (fp->f_type == DTYPE_SOCKET && u.u_ixnetbase)
- return netcall(NET__fstat, fp, sb);
-
- /* if this file is writable, then it's quite probably that the stat buffer
- information stored at open time is no longer valid. So if the file really
- is a file, update that information */
- if ((fp->f_flags & FWRITE) && fp->f_type == DTYPE_FILE)
- __fstat (fp);
-
- *sb = fp->f_stb;
- return 0;
- }
-
- /*
- * Allocate a user file descriptor.
- */
- int
- ufalloc(int want, int *result)
- {
- for (; want < NOFILE; want++)
- {
- if (u.u_ofile[want] == NULL)
- {
- u.u_pofile[want] = 0;
- if (want > u.u_lastfile) u.u_lastfile = want;
-
- *result = want;
- return 0;
- }
- }
- return EMFILE;
- }
-
- /*
- * Allocate a user file descriptor
- * and a file structure.
- * Initialize the descriptor
- * to point at the file structure.
- */
- int
- falloc(struct file **resultfp, int *resultfd)
- {
- register struct file *fp;
- int error, i;
-
- if ((error = ufalloc(0, &i)))
- return (error);
-
- ix_lock_base ();
-
- if (ix.ix_lastf == 0)
- ix.ix_lastf = ix.ix_file_tab;
-
- for (fp = ix.ix_lastf; fp < ix.ix_fileNFILE; fp++)
- if (fp->f_count == 0)
- goto slot;
-
- for (fp = ix.ix_file_tab; fp < ix.ix_lastf; fp++)
- if (fp->f_count == 0)
- goto slot;
-
- /* YES I know.. it's not optimal, we should resize the table...
- * unfortunately all code accessing file structures will then have
- * to be changed as well, and this is a job for later improvement,
- * first goal is to get this baby working... */
- ix_warning("ixemul.library file table full!");
- error = ENFILE;
- goto do_ret;
-
- slot:
- u.u_ofile[i] = fp;
- fp->f_name = 0;
- fp->f_count = 1;
- fp->f_type = 0; /* inexistant type ;-) */
- memset(&fp->f__fh, 0, sizeof(fp->f__fh));
- ix.ix_lastf = fp + 1;
- if (resultfp)
- *resultfp = fp;
- if (resultfd)
- *resultfd = i;
-
- error = 0;
-
- do_ret:
- ix_unlock_base();
-
- return error;
- }
-
-
- /*
- * Apply an advisory lock on a file descriptor.
- */
- /* ARGSUSED */
- int
- flock (int fdes, int how)
- {
- return 0; /* always succeed */
- }
-
-