SHMOP(2)

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SHMOP(2)

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shmop - ��

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        #include <sys/types.h>
        #include <sys/ipc.h>
        #include <sys/shm.h>
        
        char *shmat (shmid, shmaddr, shmflg)
        int shmid;
        char *shmaddr;
        int shmflg;
        
        int shmdt (shmaddr)
        char *shmaddr;

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�� shmat (��. ��) �� , �� shmid, � �� . �� , �� :

�� shmaddr �� , �� , �� .
�� shmaddr �� (shmflg & SHM_RND) ��, �� , �� (shmaddr - (shmaddr mod SHMLBA)) [��. intro(2)].
�� shmaddr �� (shmflg & SHM_RND) ��, �� , �� shmaddr.

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�� shmdt �� , �� shmaddr, �� .

�� (shmflg & SHM_RDONLY) ��, �� {�� }, � �� {�� }.

�� shmat �� , �� :

[EINVAL]: �� shmid �� .
[EACCES]: � �� [��. intro(2)].
[ENOMEM]: � �� .
[EINVAL]: �� shmaddr �� (shmaddr-(shmaddr mod SHMLBA)) �� .
[EINVAL]: �� shmaddr �� , �� (shmflg & SHM_RND) �� shmaddr �� .
[EMFILE]: �� , �� , �� .

�� shmdt �� , ��:

[EINVAL]: �� shmaddr �� .

��. ��
exec(2), exit(2), fork(2), intro(2), shmctl(2), shmget(2).

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�� shmat �� .

�� shmdt �� 0.

� �� -1, � �� errno �� .

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