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MUNMAP(2)		  FreeBSD System Calls Manual		     MUNMAP(2)

NAME
     munmap -- remove 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 and len parameters 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), mlock(2), mlockall(2),	mmap(2), mprotect(2), msync(2),
     getpagesize(3)

STANDARDS
     When len is non-zero, the munmap()	function conforms to IEEE Std
     1003.1-2008 ("POSIX.1").

HISTORY
     The munmap() system call has been available since 4.3BSD Net/2.

CAVEATS
     IEEE Std 1003.1-2008 ("POSIX.1") specifies	that munmap() shall fail with
     EINVAL if len is 0.  OpenBSD performs no action in	this case.

FreeBSD	13.0		       December	21, 2019		  FreeBSD 13.0

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS | HISTORY | CAVEATS

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