netbsd man page for munmap

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

NAME
     munmap -- remove a mapping

LIBRARY
     Standard C Library (libc, -lc)

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, 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 out-
			side the valid address range for a process.

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

STANDARDS
     The munmap() function conforms to IEEE Std 1003.1b-1993 (``POSIX.1'').

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

BSD
								   May 27, 1994 							       BSD