opendarwin man page for munmap

MUNMAP(2)						      BSD System Calls Manual							 MUNMAP(2)

NAME
     munmap -- remove a mapping

SYNOPSIS
     #include <sys/types.h>
     #include <sys/mman.h>

     int
     munmap(caddr_t 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, the len parameter was negative, or some part of the region being unmapped is not
			part of the currently valid address space.

SEE ALSO
     getpagesize(3), msync(2), munmap(2), mprotect(2), madvise(2), mincore(2)

HISTORY
     The munmap() function first appeared in 4.4BSD.

BSD
								  April 15, 1994							       BSD