| MINCORE(2) | System Calls Manual | MINCORE(2) | 
mincore —
#include <sys/mman.h>
int
  
  mincore(void
    *addr, size_t len,
    char *vec);
mincore() system call allows a process to obtain
  information about whether pages are core resident. The status of the memory
  range is returned in the character-per-page array vec.
  If the page is resident, the least significant bit of the corresponding
  character in vec will be set. Other bits are reserved
  for additional information which future implementations may return.
Note that the status of each page may change between the call to
    mincore() and the return of the page status
    information. In order to guarantee that pages will remain in core, the
    address range must be locked with
    mlock(2).
mincore() returns 0 on success, or -1 on failure and
  sets the variable errno to indicate the error.
mincore() call will fail if:
mincore() function first appeared in
  4.4BSD.
| June 6, 1999 | NetBSD 9.3 |