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MUNMAP(2)                     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, or some part
                        of the region being unmapped is outside 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.1b").

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

NetBSD 9.99                      May 27, 1994                      NetBSD 9.99