31 lines
609 B
C
31 lines
609 B
C
/* Mecanismes de communication entre processus - IPC */
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/* Lecture d'une zone de mémoire partagée */
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <sys/types.h>
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#define SHMEM_SIZE 256
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#define SHMEM_RIGHTS 0x01ff
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int main(int argc, char ** argv){
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long * ptz ;
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int ipc_result, ipc_key ;
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if (argc<2)
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exit(1) ;
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ipc_key = atoi(argv[1]) ;
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ipc_result = shmget(ipc_key, 0 , 0) ;
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ptz = (long *) shmat(ipc_result,0,SHMEM_RIGHTS) ;
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printf("\n Valeur dans la zone partagee : %d \n\n", *ptz) ;
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exit(0) ;
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}
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