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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [fs/] [ioctl.c] - Blame information for rev 1765

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/*
 *  linux/fs/ioctl.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 */
 
#include <asm/segment.h>
 
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/file.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,sizeof(int));
                        if (error)
                                return error;
                        put_fs_long(filp->f_inode->i_size - filp->f_pos,
                            (int *) arg);
                        return 0;
        }
        if (filp->f_op && filp->f_op->ioctl)
                return filp->f_op->ioctl(filp->f_inode, filp, cmd, arg);
        return -ENOTTY;
}
 
 
asmlinkage int sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
        struct file * filp;
        int on;
        int retval = 0;
 
        filp = fget(fd);
 
        if(filp==NULL)
                return -EBADF;
 
        switch (cmd) {
                case FIOCLEX:
                        FD_SET(fd, &current->files->close_on_exec);
                        break;
 
                case FIONCLEX:
                        FD_CLR(fd, &current->files->close_on_exec);
                        break;
 
                case FIONBIO:
                        retval = verify_area(VERIFY_READ, (unsigned int *)arg,
                                sizeof(unsigned int));
                        if(!retval)
                        {
                                on = get_user((unsigned int *) arg);
                                if (on)
                                        filp->f_flags |= O_NONBLOCK;
                                else
                                        filp->f_flags &= ~O_NONBLOCK;
                        }
                        break;
 
                case FIOASYNC: /* O_SYNC is not yet implemented,
                                  but it's here for completeness. */
                        retval = verify_area(VERIFY_READ, (unsigned int *)arg,
                                sizeof(unsigned int));
                        if(!retval)
                        {
                                on = get_user ((unsigned int *) arg);
                                if (on)
                                        filp->f_flags |= O_SYNC;
                                else
                                        filp->f_flags &= ~O_SYNC;
                        }
                        break;
 
                default:
                        if (filp->f_inode && S_ISREG(filp->f_inode->i_mode))
                                retval = file_ioctl(filp, cmd, arg);
                        else if (filp->f_op && filp->f_op->ioctl)
                                retval = filp->f_op->ioctl(filp->f_inode, filp, cmd, arg);
                        else
                                retval = -ENOTTY;
        }
        fput(filp, filp->f_inode);
        return retval;
}

Line No.	Rev	Author	Line
1	199	simons	`/*`
2			`* linux/fs/ioctl.c`
3			`*`
4			`* Copyright (C) 1991, 1992 Linus Torvalds`
5			`*/`
6
7			`#include <asm/segment.h>`
8
9			`#include <linux/sched.h>`
10			`#include <linux/mm.h>`
11			`#include <linux/file.h>`
12			`#include <linux/errno.h>`
13			`#include <linux/string.h>`
14			`#include <linux/stat.h>`
15			`#include <linux/termios.h>`
16			`#include <linux/fcntl.h> /* for f_flags values */`
17
18			`static int file_ioctl(struct file *filp,unsigned int cmd,unsigned long arg)`
19			`{`
20			`int error;`
21			`int block;`
22
23			`switch (cmd) {`
24			`case FIBMAP:`
25			`if (filp->f_inode->i_op == NULL)`
26			`return -EBADF;`
27			`if (filp->f_inode->i_op->bmap == NULL)`
28			`return -EINVAL;`
29			`error = verify_area(VERIFY_WRITE,(void *) arg,4);`
30			`if (error)`
31			`return error;`
32			`block = get_fs_long((long *) arg);`
33			`block = filp->f_inode->i_op->bmap(filp->f_inode,block);`
34			`put_fs_long(block,(long *) arg);`
35			`return 0;`
36			`case FIGETBSZ:`
37			`if (filp->f_inode->i_sb == NULL)`
38			`return -EBADF;`
39			`error = verify_area(VERIFY_WRITE,(void *) arg,4);`
40			`if (error)`
41			`return error;`
42			`put_fs_long(filp->f_inode->i_sb->s_blocksize,`
43			`(long *) arg);`
44			`return 0;`
45			`case FIONREAD:`
46			`error = verify_area(VERIFY_WRITE,(void *) arg,sizeof(int));`
47			`if (error)`
48			`return error;`
49			`put_fs_long(filp->f_inode->i_size - filp->f_pos,`
50			`(int *) arg);`
51			`return 0;`
52			`}`
53			`if (filp->f_op && filp->f_op->ioctl)`
54			`return filp->f_op->ioctl(filp->f_inode, filp, cmd, arg);`
55			`return -ENOTTY;`
56			`}`
57
58
59			`asmlinkage int sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)`
60			`{`
61			`struct file * filp;`
62			`int on;`
63			`int retval = 0;`
64
65			`filp = fget(fd);`
66
67			`if(filp==NULL)`
68			`return -EBADF;`
69
70			`switch (cmd) {`
71			`case FIOCLEX:`
72			`FD_SET(fd, &current->files->close_on_exec);`
73			`break;`
74
75			`case FIONCLEX:`
76			`FD_CLR(fd, &current->files->close_on_exec);`
77			`break;`
78
79			`case FIONBIO:`
80			`retval = verify_area(VERIFY_READ, (unsigned int *)arg,`
81			`sizeof(unsigned int));`
82			`if(!retval)`
83			`{`
84			`on = get_user((unsigned int *) arg);`
85			`if (on)`
86			`filp->f_flags \|= O_NONBLOCK;`
87			`else`
88			`filp->f_flags &= ~O_NONBLOCK;`
89			`}`
90			`break;`
91
92			`case FIOASYNC: /* O_SYNC is not yet implemented,`
93			`but it's here for completeness. */`
94			`retval = verify_area(VERIFY_READ, (unsigned int *)arg,`
95			`sizeof(unsigned int));`
96			`if(!retval)`
97			`{`
98			`on = get_user ((unsigned int *) arg);`
99			`if (on)`
100			`filp->f_flags \|= O_SYNC;`
101			`else`
102			`filp->f_flags &= ~O_SYNC;`
103			`}`
104			`break;`
105
106			`default:`
107			`if (filp->f_inode && S_ISREG(filp->f_inode->i_mode))`
108			`retval = file_ioctl(filp, cmd, arg);`
109			`else if (filp->f_op && filp->f_op->ioctl)`
110			`retval = filp->f_op->ioctl(filp->f_inode, filp, cmd, arg);`
111			`else`
112			`retval = -ENOTTY;`
113			`}`
114			`fput(filp, filp->f_inode);`
115			`return retval;`
116			`}`

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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [fs/] [ioctl.c] - Blame information for rev 1765