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

NAME
     munmap -- remove a mapping

SYNOPSIS
     ##include <>
     ##include <>

     int
     munmap(caddrt addr, sizet 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.

ERORS
     unmap() 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