Re: System V msg queue bugs in latest kernels

Mark Swanson (swansma@yahoo.com)
Sat, 17 Feb 2001 11:40:23 -0800 (PST)


The exact error is in /usr/include/linux/msg.h

The three unsigned shorts should be unsigned int instead.
Would too many things break if this was changed?
Should user-space tools like ipcs be rewritten to use /proc/sysvipc
instead? (I notice that my old 2.2.14 kernel doesn't have
/proc/sysvipc...)

Thanks.

/* one msqid structure for each queue on the system */
struct msqid_ds {
struct ipc_perm msg_perm;
struct msg *msg_first; /* first message on queue */
struct msg *msg_last; /* last message in queue */
__kernel_time_t msg_stime; /* last msgsnd time */
__kernel_time_t msg_rtime; /* last msgrcv time */
__kernel_time_t msg_ctime; /* last change time */
struct wait_queue *wwait;
struct wait_queue *rwait;
unsigned short msg_cbytes; /* current number of bytes on queue */
unsigned short msg_qnum; /* number of messages in queue */
unsigned short msg_qbytes; /* max number of bytes on queue */
__kernel_ipc_pid_t msg_lspid; /* pid of last msgsnd */
__kernel_ipc_pid_t msg_lrpid; /* last receive pid */
};

=====
A camel is ugly but useful; it may stink, and it may spit, but it'll get you where you're going. - Larry Wall -

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