semget.c raw

   1  #include <sys/sem.h>
   2  #include <limits.h>
   3  #include <errno.h>
   4  #include "syscall.h"
   5  #include "ipc.h"
   6  
   7  int semget(key_t key, int n, int fl)
   8  {
   9  	/* The kernel uses the wrong type for the sem_nsems member
  10  	 * of struct semid_ds, and thus might not check that the
  11  	 * n fits in the correct (per POSIX) userspace type, so
  12  	 * we have to check here. */
  13  	if (n > USHRT_MAX) return __syscall_ret(-EINVAL);
  14  #ifndef SYS_ipc
  15  	return syscall(SYS_semget, key, n, fl);
  16  #else
  17  	return syscall(SYS_ipc, IPCOP_semget, key, n, fl);
  18  #endif
  19  }
  20