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- /*
- * 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->filp[fd]))
- return -EBADF;
- switch (cmd) {
- case FIOCLEX:
- FD_SET(fd, ¤t->close_on_exec);
- return 0;
-
- case FIONCLEX:
- FD_CLR(fd, ¤t->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;
- }
- }
-