Attach / detach Syscall API
[Level 0 API (Syscall API)]

Collaboration diagram for Attach / detach Syscall API:

Functions
int	a4l_sys_attach (int fd, a4l_lnkdesc_t *arg)
	Attach an Analogy device to a driver.
int	a4l_sys_detach (int fd)
	Detach an Analogy device from a driver.

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Function Documentation

int a4l_sys_attach	(	int	fd,
		a4l_lnkdesc_t *	arg
	)

Attach an Analogy device to a driver.

Parameters:

[in]	fd	File descriptor as returned by a4l_sys_open()
[in]	arg	Link descriptor argument

Returns:

0 on success. Otherwise:

• -ENOMEM is returned if the system is out of memory
• -EINVAL is returned if some argument is missing or wrong (Please, type "dmesg" for more info)
• -EFAULT is returned if a user <-> kernel transfer went wrong
• -ENODEV is returned in case of internal error (Please, type "dmesg" for more info)
• -ENXIO is returned in case of internal error (Please, type "dmesg" for more info)

int a4l_sys_detach

(

int

fd

)

Detach an Analogy device from a driver.

Parameters:

[in]

fd

File descriptor as returned by a4l_sys_open()

Returns:

0 on success. Otherwise:

• -EINVAL is returned if some argument is missing or wrong (Please, type "dmesg" for more info)
• -EBUSY is returned if the device to be detached is in use
• -EPERM is returned if the devive to be detached still has some buffer mapped in user-space
• -ENODEV is returned in case of internal error (Please, type "dmesg" for more info)
• -ENXIO is returned in case of internal error (Please, type "dmesg" for more info)