Re: System V msg queue bugs in latest kernels

From: Mark Swanson (swansma@yahoo.com)
Date: Sat Feb 17 2001 - 14:40:23 EST

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    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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