C - Semaphore Rights Issue

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I tried to allow other user's program to modify my semaphore ( Basically remove it) , but It is failing.

Below is my semaphore creation command:

  if ((semID = semget(key, 2, IPC_CREAT | 0777)) == -1) {
    perror("Sem Creation:");
              exit(2);
   }

Still programs which are run by other's users are unable to delete semaphore with error that " Not owner"

asked 38 secs ago

user3440629

68

C - Semaphore Rights Issue