Import of Linus's Linux 1.1.68

1 files changed, 99 insertions, 0 deletions

diff --git a/fs/ioctl.c b/fs/ioctl.c
new file mode 100644
index 000000000..22d0f4d10
--- /dev/null
+++ b/fs/ioctl.c
@@ -0,0 +1,99 @@
+/*
+ *  linux/fs/ioctl.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ */
+
+#include <asm/segment.h>
+
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/termios.h>
+#include <linux/fcntl.h> /* for f_flags values */
+
+static int file_ioctl(struct file *filp,unsigned int cmd,unsigned long arg)
+{
+	int error;
+	int block;
+
+	switch (cmd) {
+		case FIBMAP:
+			if (filp->f_inode->i_op == NULL)
+				return -EBADF;
+		    	if (filp->f_inode->i_op->bmap == NULL)
+				return -EINVAL;
+			error = verify_area(VERIFY_WRITE,(void *) arg,4);
+			if (error)
+				return error;
+			block = get_fs_long((long *) arg);
+			block = filp->f_inode->i_op->bmap(filp->f_inode,block);
+			put_fs_long(block,(long *) arg);
+			return 0;
+		case FIGETBSZ:
+			if (filp->f_inode->i_sb == NULL)
+				return -EBADF;
+			error = verify_area(VERIFY_WRITE,(void *) arg,4);
+			if (error)
+				return error;
+			put_fs_long(filp->f_inode->i_sb->s_blocksize,
+			    (long *) arg);
+			return 0;
+		case FIONREAD:
+			error = verify_area(VERIFY_WRITE,(void *) arg,4);
+			if (error)
+				return error;
+			put_fs_long(filp->f_inode->i_size - filp->f_pos,
+			    (long *) arg);
+			return 0;
+	}
+	if (filp->f_op && filp->f_op->ioctl)
+		return filp->f_op->ioctl(filp->f_inode, filp, cmd,arg);
+	return -EINVAL;
+}
+
+
+asmlinkage int sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
+{	
+	struct file * filp;
+	int on;
+
+	if (fd >= NR_OPEN || !(filp = current->files->fd[fd]))
+		return -EBADF;
+	switch (cmd) {
+		case FIOCLEX:
+			FD_SET(fd, &current->files->close_on_exec);
+			return 0;
+
+		case FIONCLEX:
+			FD_CLR(fd, &current->files->close_on_exec);
+			return 0;
+
+		case FIONBIO:
+			on = get_fs_long((unsigned long *) arg);
+			if (on)
+				filp->f_flags |= O_NONBLOCK;
+			else
+				filp->f_flags &= ~O_NONBLOCK;
+			return 0;
+
+		case FIOASYNC: /* O_SYNC is not yet implemented,
+				  but it's here for completeness. */
+			on = get_fs_long ((unsigned long *) arg);
+			if (on)
+				filp->f_flags |= O_SYNC;
+			else
+				filp->f_flags &= ~O_SYNC;
+			return 0;
+
+		default:
+			if (filp->f_inode && S_ISREG(filp->f_inode->i_mode))
+				return file_ioctl(filp,cmd,arg);
+
+			if (filp->f_op && filp->f_op->ioctl)
+				return filp->f_op->ioctl(filp->f_inode, filp, cmd,arg);
+
+			return -EINVAL;
+	}
+}