HP-UX Reference (11i v1 05/09) - 2 System Calls (vol 5)

munmap(2) munmap(2)

HP-UX EXTENSIONS

SYNOPSIS

int munmap(caddr_t addr, size_t len);

DESCRIPTION

munmap() unmaps a mapped ﬁle or anonymous memory region.

If the address range speciﬁed by addr and len was not created by a successful call to

mmap(), munmap()

returns an error.

If the speciﬁed address range was created by multiple calls to

mmap(), munmap() succeeds in unmap-

ping all of the speciﬁed regions, provided they form a contiguous address range.

If the region was created with the

MAP_PRIVATE option, any modiﬁcations made to the region are dis-

carded.

ERRORS

[EINVAL] addr is not a multiple of the page size as returned by

sysconf(_SC_PAGE_SIZE)

[EINVAL] The address range speciﬁed by addr and len was not created by a successful call to

mmap().

AUTHOR

munmap() was developed by HP, AT&T, and OSF.