munmap - remove a mapping

CONTENTS

Library
Synopsis
Description
Return Values
Errors
History

.Lb libc

.In sys/mman.h int munmap void *addr size_t len

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.

.Rv -std munmap

The munmap system call will fail if:

[EINVAL]
	The addr argument was not page aligned, the len argument was zero or negative, or some part of the region being unmapped is outside the valid address range for a process.

madvise(2), mincore(2), mmap(2), mprotect(2), msync(2), getpagesize(3)

The munmap system call first appeared in BSD 4.4 .

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