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MUNMAP(2) System Calls Manual MUNMAP(2)

NAME

munmapremove a mapping

SYNOPSIS

#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, the value 0 is returned; otherwise the value -1 is returned and the global variable 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() system call first appeared in 4.1cBSD.
July 2, 2014 OpenBSD-5.8