The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/ibcs2/ibcs2_ipc.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (c) 1995 Steven Wallace
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Steven Wallace.
   18  * 4. The name of the author may not be used to endorse or promote products
   19  *    derived from this software without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   31  *
   32  * $FreeBSD: stable/12/sys/i386/ibcs2/ibcs2_ipc.h 326260 2017-11-27 15:08:52Z pfg $
   33  */
   34 
   35 
   36 struct ibcs2_ipc_perm {
   37         u_short uid;    /* user id */
   38         u_short gid;    /* group id */
   39         u_short cuid;   /* creator user id */
   40         u_short cgid;   /* creator group id */
   41         u_short mode;   /* r/w permission */
   42         u_short seq;    /* sequence # (to generate unique msg/sem/shm id) */
   43         ibcs2_key_t key; /* user specified msg/sem/shm key */
   44 };
   45 
   46 struct ibcs2_msqid_ds {
   47         struct ibcs2_ipc_perm msg_perm;
   48         struct msg *msg_first;
   49         struct msg *msg_last;
   50         u_short msg_cbytes;
   51         u_short msg_qnum;
   52         u_short msg_qbytes;
   53         u_short msg_lspid;
   54         u_short msg_lrpid;
   55         ibcs2_time_t msg_stime;
   56         ibcs2_time_t msg_rtime;
   57         ibcs2_time_t msg_ctime;
   58 };
   59 
   60 struct ibcs2_semid_ds {
   61         struct ibcs2_ipc_perm sem_perm;
   62         struct ibcs2_sem *sem_base;
   63         u_short sem_nsems;
   64         ibcs2_time_t sem_otime;
   65         ibcs2_time_t sem_ctime;
   66 };
   67 
   68 struct ibcs2_sem {
   69         u_short semval;
   70         ibcs2_pid_t sempid;
   71         u_short semncnt;
   72         u_short semzcnt;
   73 };
   74 
   75 struct ibcs2_shmid_ds {
   76         struct ibcs2_ipc_perm shm_perm;
   77         int shm_segsz;
   78         int pad1;
   79         char pad2[4];
   80         u_short shm_lpid;
   81         u_short shm_cpid;
   82         u_short shm_nattch;
   83         u_short shm_cnattch;
   84         ibcs2_time_t shm_atime;
   85         ibcs2_time_t shm_dtime;
   86         ibcs2_time_t shm_ctime;
   87 };

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