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	/* ½Ã½ºÅ۾ȿ¡¼ °¢ °øÀ¯ ¸Þ¸ð¸® ¼¼±×¸ÕÆ®¿¡ ´ëÇÑ shmid ÀÚ·á ±¸Á¶ */
        struct shmid_ds {
                struct ipc_perm shm_perm;        /* µ¿ÀÛ Çã°¡»çÇ× */
                int     shm_segsz;               /* ¼¼±×¸ÕÆ®ÀÇ Å©±â(bytes) */
                time_t  shm_atime;               /* ¸¶Áö¸· attach ½Ã°£ */
                time_t  shm_dtime;               /* ¸¶Áö¸· detach ½Ã°£ */
                time_t  shm_ctime;               /* ¸¶Áö¸· change ½Ã°£ */
                unsigned short  shm_cpid;        /* »ý¼ºÀÚÀÇ pid */
                unsigned short  shm_lpid;        /* ¸¶Áö¸· µ¿ÀÛÀÚÀÇ pid */
                short   shm_nattch;              /* ÇöÀç attaches no. */
                                                 /* the following are private */
                unsigned short   shm_npages;     /* ¼¼±×¸ÕÆ®ÀÇ Å©±â (pages) */
                unsigned long   *shm_pages;      /* array of ptrs to frames -> SHMMAX */ 
                struct vm_area_struct *attaches; /* descriptors for attaches */
        };
Copyright (c) 1996,1997 by Euibeom.Hwang & SangEun.Oh All Rights Reserved 
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LAST UPDATE Nov 28,1997
Created Nov 28,1997