copy_compat_msqid_to

函数名称：copy_compat_msqid_to_user

函数原型：static int copy_compat_msqid_to_user(void __user *buf, struct msqid64_ds *in, int version)

返回类型：int

参数：

类型	参数	名称
void __user *	buf
struct msqid64_ds *	in
int	version

673

如果version恒等于New version (support 32-bit UIDs, biggermessage sizes, etc. 则

675

memset( & v, 0, v的长度)

676

to_compat_ipc64_perm( & msg_perm, & msg_perm)

677

msg_stime等于lower_32_bits - return bits 0-31 of a number*@n: the number we're accessing(last msgsnd time )

678

msg_stime_high等于upper_32_bits - return bits 32-63 of a number*@n: the number we're accessing* A basic shift-right of a 64- or 32-bit quantity. Use this to suppress* the "right shift count >= width of type" warning when that quantity is* 32-bits.(last msgsnd time )

679

msg_rtime等于lower_32_bits - return bits 0-31 of a number*@n: the number we're accessing(last msgrcv time )

680

msg_rtime_high等于upper_32_bits - return bits 32-63 of a number*@n: the number we're accessing* A basic shift-right of a 64- or 32-bit quantity. Use this to suppress* the "right shift count >= width of type" warning when that quantity is* 32-bits.(last msgrcv time )

681

msg_ctime等于lower_32_bits - return bits 0-31 of a number*@n: the number we're accessing(last change time )

682

msg_ctime_high等于upper_32_bits - return bits 32-63 of a number*@n: the number we're accessing* A basic shift-right of a 64- or 32-bit quantity. Use this to suppress* the "right shift count >= width of type" warning when that quantity is* 32-bits.(last change time )

683

msg_cbytes等于current number of bytes on queue

684

msg_qnum等于umber of messages in queue

685

msg_qbytes等于max number of bytes on queue

686

msg_lspid等于pid of last msgsnd

687

msg_lrpid等于last receive pid

688

返回:copy_to_user(buf, & v, v的长度)

689

否则

691

memset( & v, 0, v的长度)

692

to_compat_ipc_perm( & msg_perm, & msg_perm)

693

msg_stime等于last msgsnd time

694

msg_rtime等于last msgrcv time

695

msg_ctime等于last change time

696