sys-utils/ipcrm.c

   1 /*
   2  * krishna balasubramanian 1993
   3  */
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <errno.h>
   9
  10 #include <sys/types.h>
  11 #include <sys/ipc.h>
  12 #include <sys/shm.h>
  13 #include <sys/msg.h>
  14 #include <sys/sem.h>
  15 #if defined (__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
  16 /* union semun is defined by including <sys/sem.h> */
  17 #else
  18 /* according to X/OPEN we have to define it ourselves */
  19 union semun {
  20         int val;
  21         struct semid_ds *buf;
  22         unsigned short int *array;
  23         struct seminfo *__buf;
  24 };
  25 #endif
  26
  27
  28 int main(int argc, char **argv)
  29 {
  30         int id;
  31         union semun arg;
  32
  33         arg.val = 0;
  34
  35         if (argc != 3 || strlen(argv[1]) < 3) {
  36                 printf ("usage: %s [shm | msg | sem] id\n", argv[0]);
  37                 exit (1);
  38         }
  39         id = atoi (argv[2]);
  40         switch (argv[1][1])  {
  41         case 'h':
  42                 if (!shmctl (id, IPC_RMID, NULL))
  43                 break;
  44                 perror ("shmctl ");
  45                 exit (1);
  46
  47         case 'e':
  48                 if (!semctl (id, 0, IPC_RMID, arg))
  49                 break;
  50                 perror ("semctl ");
  51                 exit (1);
  52
  53         case 's':
  54                 if (!msgctl (id, IPC_RMID, NULL))
  55                 break;
  56                 perror ("msgctl ");
  57                 exit (1);
  58
  59         default:
  60                 printf ("usage: %s [-shm | -msg | -sem] id\n", argv[0]);
  61                 exit (1);
  62         }
  63         printf ("resource deleted\n");
  64         return 0;
  65 }
  66