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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. #include <errno.h>
  5. #include <unistd.h>
  6. #include <sys/types.h>
  7. #include <sys/wait.h>
  8. #include <sys/ipc.h>
  9. #include <sys/sem.h>
  10. #include <sys/shm.h>
  11.  
  12. struct sembuf semafor;
  13.  
  14. int opusc(int klucz, int nr){
  15.     semafor.sem_num=nr;
  16.     semafor.sem_op=-1;
  17.     semafor.sem_flg=0;
  18.     if(semop(klucz, &semafor, 1)==-1)
  19.   		return 1;
  20.   	return 0;
  21. }
  22.  
  23. int main(){
  24. 	int semID = semget(111111, 1, IPC_CREAT|0666);
  25.     int abbb=semctl(semID, 0, SETVAL, 1);
  26. 	printf("%d",opusc(semID,0));
  27. 	return 0;
  28. }
Success #stdin #stdout 0s 2156KB
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https://ideone.com/opKKrq
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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