Import of original NetBSD's ibcs2 emulator sources by Scott Bartram,

which is used as a basis for a more complete and cleaner ibcs2 emulator.
(snapshot about May 1995 with a few files from September 1995)

Some files and code from old emulator still remains.
New files, features, and changes have been implemented by myself,
which will be shown in following commits.

1 files changed, 305 insertions, 0 deletions

diff --git a/sys/i386/ibcs2/ibcs2_fcntl.c b/sys/i386/ibcs2/ibcs2_fcntl.c
new file mode 100644
index 0000000..4dede8c
--- /dev/null
+++ b/sys/i386/ibcs2/ibcs2_fcntl.c
@@ -0,0 +1,305 @@
+/*
+ * Copyright (c) 1995 Scott Bartram
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/namei.h>
+#include <sys/proc.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/filedesc.h>
+#include <sys/ioctl.h>
+#include <sys/kernel.h>
+#include <sys/mount.h>
+#include <sys/malloc.h>
+#include <sys/syscallargs.h>
+
+#include <compat/ibcs2/ibcs2_types.h>
+#include <compat/ibcs2/ibcs2_fcntl.h>
+#include <compat/ibcs2/ibcs2_signal.h>
+#include <compat/ibcs2/ibcs2_syscallargs.h>
+#include <compat/ibcs2/ibcs2_util.h>
+
+
+static int
+cvt_o_flags(flags)
+	int flags;
+{
+	int r = 0;
+
+        /* convert mode into NetBSD mode */
+	if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
+	if (flags & IBCS2_O_RDWR) r |= O_RDWR;
+	if (flags & (IBCS2_O_NDELAY | IBCS2_O_NONBLOCK)) r |= O_NONBLOCK;
+	if (flags & IBCS2_O_APPEND) r |= O_APPEND;
+	if (flags & IBCS2_O_SYNC) r |= O_FSYNC;
+	if (flags & IBCS2_O_CREAT) r |= O_CREAT;
+	if (flags & IBCS2_O_TRUNC) r |= O_TRUNC;
+	if (flags & IBCS2_O_EXCL) r |= O_EXCL;
+	return r;
+}
+
+static void
+cvt_flock2iflock(flp, iflp)
+	struct flock *flp;
+	struct ibcs2_flock *iflp;
+{
+	switch (flp->l_type) {
+	case F_RDLCK:
+		iflp->l_type = IBCS2_F_RDLCK;
+		break;
+	case F_WRLCK:
+		iflp->l_type = IBCS2_F_WRLCK;
+		break;
+	case F_UNLCK:
+		iflp->l_type = IBCS2_F_UNLCK;
+		break;
+	}
+	iflp->l_whence = (short)flp->l_whence;
+	iflp->l_start = (ibcs2_off_t)flp->l_start;
+	iflp->l_len = (ibcs2_off_t)flp->l_len;
+	iflp->l_sysid = 0;
+	iflp->l_pid = (ibcs2_pid_t)flp->l_pid;
+}
+
+static void
+cvt_iflock2flock(iflp, flp)
+	struct ibcs2_flock *iflp;
+	struct flock *flp;
+{
+	flp->l_start = (off_t)iflp->l_start;
+	flp->l_len = (off_t)iflp->l_len;
+	flp->l_pid = (pid_t)iflp->l_pid;
+	switch (iflp->l_type) {
+	case IBCS2_F_RDLCK:
+		flp->l_type = F_RDLCK;
+		break;
+	case IBCS2_F_WRLCK:
+		flp->l_type = F_WRLCK;
+		break;
+	case IBCS2_F_UNLCK:
+		flp->l_type = F_UNLCK;
+		break;
+	}
+	flp->l_whence = iflp->l_whence;
+}
+
+/* convert iBCS2 mode into NetBSD mode */
+static int
+ioflags2oflags(flags)
+	int flags;
+{
+	int r = 0;
+	
+	if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
+	if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
+	if (flags & IBCS2_O_RDWR) r |= O_RDWR;
+	if (flags & IBCS2_O_NDELAY) r |= O_NONBLOCK;
+	if (flags & IBCS2_O_APPEND) r |= O_APPEND;
+	if (flags & IBCS2_O_SYNC) r |= O_FSYNC;
+	if (flags & IBCS2_O_NONBLOCK) r |= O_NONBLOCK;
+	if (flags & IBCS2_O_CREAT) r |= O_CREAT;
+	if (flags & IBCS2_O_TRUNC) r |= O_TRUNC;
+	if (flags & IBCS2_O_EXCL) r |= O_EXCL;
+	if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
+	return r;
+}
+
+/* convert NetBSD mode into iBCS2 mode */
+static int
+oflags2ioflags(flags)
+	int flags;
+{
+	int r = 0;
+	
+	if (flags & O_RDONLY) r |= IBCS2_O_RDONLY;
+	if (flags & O_WRONLY) r |= IBCS2_O_WRONLY;
+	if (flags & O_RDWR) r |= IBCS2_O_RDWR;
+	if (flags & O_NDELAY) r |= IBCS2_O_NONBLOCK;
+	if (flags & O_APPEND) r |= IBCS2_O_APPEND;
+	if (flags & O_FSYNC) r |= IBCS2_O_SYNC;
+	if (flags & O_NONBLOCK) r |= IBCS2_O_NONBLOCK;
+	if (flags & O_CREAT) r |= IBCS2_O_CREAT;
+	if (flags & O_TRUNC) r |= IBCS2_O_TRUNC;
+	if (flags & O_EXCL) r |= IBCS2_O_EXCL;
+	if (flags & O_NOCTTY) r |= IBCS2_O_NOCTTY;
+	return r;
+}
+
+int
+ibcs2_open(p, uap, retval)
+	struct proc *p;
+	struct ibcs2_open_args *uap;
+	int *retval;
+{
+	int noctty = SCARG(uap, flags) & IBCS2_O_NOCTTY;
+	int ret;
+	caddr_t sg = stackgap_init();
+
+	SCARG(uap, flags) = cvt_o_flags(SCARG(uap, flags));
+	if (SCARG(uap, flags) & O_CREAT)
+		CHECKALTCREAT(p, &sg, SCARG(uap, path));
+	else
+		CHECKALTEXIST(p, &sg, SCARG(uap, path));
+	ret = open(p, uap, retval);
+
+	if (!ret && !noctty && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
+		struct filedesc *fdp = p->p_fd;
+		struct file *fp = fdp->fd_ofiles[*retval];
+
+		/* ignore any error, just give it a try */
+		if (fp->f_type == DTYPE_VNODE)
+			(fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, (caddr_t) 0, p);
+	}
+	return ret;
+}
+
+int
+ibcs2_creat(p, uap, retval)
+        struct proc *p;  
+	struct ibcs2_creat_args *uap;
+	int *retval;
+{       
+	struct open_args cup;   
+	caddr_t sg = stackgap_init();
+
+	CHECKALTCREAT(p, &sg, SCARG(uap, path));
+	SCARG(&cup, path) = SCARG(uap, path);
+	SCARG(&cup, mode) = SCARG(uap, mode);
+	SCARG(&cup, flags) = O_WRONLY | O_CREAT | O_TRUNC;
+	return open(p, &cup, retval);
+}       
+
+int
+ibcs2_access(p, uap, retval)
+        struct proc *p;
+        struct ibcs2_access_args *uap;
+        int *retval;
+{
+        struct access_args cup;
+        caddr_t sg = stackgap_init();
+
+        CHECKALTEXIST(p, &sg, SCARG(uap, path));
+        SCARG(&cup, path) = SCARG(uap, path);
+        SCARG(&cup, flags) = SCARG(uap, flags);
+        return access(p, &cup, retval);
+}
+
+int
+ibcs2_fcntl(p, uap, retval)
+	struct proc *p;
+	struct ibcs2_fcntl_args *uap;
+	int *retval;
+{
+	int error;
+	struct fcntl_args fa;
+	struct flock *flp;
+	struct ibcs2_flock ifl;
+	
+	switch(SCARG(uap, cmd)) {
+	case IBCS2_F_DUPFD:
+		SCARG(&fa, fd) = SCARG(uap, fd);
+		SCARG(&fa, cmd) = F_DUPFD;
+		SCARG(&fa, arg) = SCARG(uap, arg);
+		return fcntl(p, &fa, retval);
+	case IBCS2_F_GETFD:
+		SCARG(&fa, fd) = SCARG(uap, fd);
+		SCARG(&fa, cmd) = F_GETFD;
+		SCARG(&fa, arg) = SCARG(uap, arg);
+		return fcntl(p, &fa, retval);
+	case IBCS2_F_SETFD:
+		SCARG(&fa, fd) = SCARG(uap, fd);
+		SCARG(&fa, cmd) = F_SETFD;
+		SCARG(&fa, arg) = SCARG(uap, arg);
+		return fcntl(p, &fa, retval);
+	case IBCS2_F_GETFL:
+		SCARG(&fa, fd) = SCARG(uap, fd);
+		SCARG(&fa, cmd) = F_GETFL;
+		SCARG(&fa, arg) = SCARG(uap, arg);
+		error = fcntl(p, &fa, retval);
+		if (error)
+			return error;
+		*retval = oflags2ioflags(*retval);
+		return error;
+	case IBCS2_F_SETFL:
+		SCARG(&fa, fd) = SCARG(uap, fd);
+		SCARG(&fa, cmd) = F_SETFL;
+		SCARG(&fa, arg) = (void *)ioflags2oflags(SCARG(uap, arg));
+		return fcntl(p, &fa, retval);
+
+	case IBCS2_F_GETLK:
+	    {
+		caddr_t sg = stackgap_init();
+		flp = stackgap_alloc(&sg, sizeof(*flp));
+		error = copyin((caddr_t)SCARG(uap, arg), (caddr_t)&ifl,
+			       ibcs2_flock_len);
+		if (error)
+			return error;
+		cvt_iflock2flock(&ifl, flp);
+		SCARG(&fa, fd) = SCARG(uap, fd);
+		SCARG(&fa, cmd) = F_GETLK;
+		SCARG(&fa, arg) = (void *)flp;
+		error = fcntl(p, &fa, retval);
+		if (error)
+			return error;
+		cvt_flock2iflock(flp, &ifl);
+		return copyout((caddr_t)&ifl, (caddr_t)SCARG(uap, arg),
+			       ibcs2_flock_len);
+	    }
+
+	case IBCS2_F_SETLK:
+	    {
+		caddr_t sg = stackgap_init();
+		flp = stackgap_alloc(&sg, sizeof(*flp));
+		error = copyin((caddr_t)SCARG(uap, arg), (caddr_t)&ifl,
+			       ibcs2_flock_len);
+		if (error)
+			return error;
+		cvt_iflock2flock(&ifl, flp);
+		SCARG(&fa, fd) = SCARG(uap, fd);
+		SCARG(&fa, cmd) = F_SETLK;
+		SCARG(&fa, arg) = (void *)flp;
+		return fcntl(p, &fa, retval);
+	    }
+
+	case IBCS2_F_SETLKW:
+	    {
+		caddr_t sg = stackgap_init();
+		flp = stackgap_alloc(&sg, sizeof(*flp));
+		error = copyin((caddr_t)SCARG(uap, arg), (caddr_t)&ifl,
+			       ibcs2_flock_len);
+		if (error)
+			return error;
+		cvt_iflock2flock(&ifl, flp);
+		SCARG(&fa, fd) = SCARG(uap, fd);
+		SCARG(&fa, cmd) = F_SETLKW;
+		SCARG(&fa, arg) = (void *)flp;
+		return fcntl(p, &fa, retval);
+	    }
+	}
+	return ENOSYS;
+}