NAME
munmap —
remove a mapping
SYNOPSIS
#include
<sys/types.h>
#include <sys/mman.h>
int
munmap(void
*addr, size_t
len);
DESCRIPTION
The
munmap()
system call deletes the mappings for the specified address range, and causes
further references to addresses within the range to generate invalid memory
references.
RETURN VALUES
Upon successful completion, munmap returns
zero. Otherwise, a value of -1 is returned and errno
is set to indicate the error.
ERRORS
munmap() will fail if:
- [
EINVAL] - The addr parameter was not page aligned, addr and len specify a region that would extend beyond the end of the address space, or some part of the region being unmapped is not part of the currently valid address space.
SEE ALSO
madvise(2), mincore(2), mlock(2), mlockall(2), mmap(2), mprotect(2), msync(2), getpagesize(3)
HISTORY
The munmap() function first appeared in
4.4BSD.