NAME
  ipcs - provide information on ipc facilities

SYNOPSIS
  ipcs [-smMq] [id | addr]

DESCRIPTION
  This command provides information on the ipc facilities. Without
  specified one of -s -m -q -M, the command will show all of three
  facilities.
  
       -s  shows semaphore arrays
       -m  shows shared memory segments
       -M  shows shared memory segments with some detailed
           information
       -q  shows message queue
       id  it allows a specific resource id to be specified, and the
           information on this id will be printed
     addr  it allows a specific resource's address to be specified,
           the address is listed by ipcs command in the first column

EXAMPLE
  display all ipc facilities:

    crash> ipcs
    SHMID_KERNEL     KEY      SHMID      UID   PERMS BYTES      NATTCH STATUS
    ffff880473a28310 00000000 0          0     666   90000      1       
    ffff880473a28490 00000001 32769      0     666   90000      1       
    ffff880473a28250 00000002 65538      0     666   90000      1       
    
    SEM_ARRAY        KEY      SEMID      UID   PERMS NSEMS     
    ffff88047200f9d0 00000000 0          0     600   1         
    ffff88046f826910 00000000 32769      0     600   1         
    
    MSG_QUEUE        KEY        MSQID      UID   PERMS USED-BYTES   MESSAGES    
    (none allocated)
    
  display shared memory with detailed information:

    crash> ipcs -M
    SHMID_KERNEL     KEY      SHMID      UID   PERMS BYTES      NATTCH STATUS
    ffff880473a28310 00000000 0          0     666   90000      1       
    PAGES ALLOCATED/RESIDENT/SWAPPED: 22/1/0
    INODE: ffff88047239cd98
    
    SHMID_KERNEL     KEY      SHMID      UID   PERMS BYTES      NATTCH STATUS
    ffff880473a28490 00000001 32769      0     666   90000      1       
    PAGES ALLOCATED/RESIDENT/SWAPPED: 22/1/0
    INODE: ffff88047239c118
    
    SHMID_KERNEL     KEY      SHMID      UID   PERMS BYTES      NATTCH STATUS
    ffff880473a28250 00000002 65538      0     666   90000      1       
    PAGES ALLOCATED/RESIDENT/SWAPPED: 22/1/0
    INODE: ffff880470503758
    
  display specified resources in detail with an address

    crash> ipcs -M ffff880473a28250
    SHMID_KERNEL     KEY      SHMID      UID   PERMS BYTES      NATTCH STATUS
    ffff880473a28250 00000002 65538      0     666   90000      1       
    PAGES ALLOCATED/RESIDENT/SWAPPED: 22/1/0
    INODE: ffff880470503758