Manual page for munmap(2)
munmap - unmap pages of memory
SYNOPSIS
#include <sys/types.h>
#include <sys/mman.h>
int munmap(caddr_t addr,
size_t len);
DESCRIPTION
The function
munmap()
removes the mappings for pages in the range
[addr, addr + len).
Further references to these pages will result
in the delivery of a
SIGSEGV
signal to the process.
The function mmap
often performs an implicit
munmap().
RETURN VALUES
Upon successful completion, the function
munmap()
returns a
value of 0; otherwise, it returns a value of -1 and
sets errno to indicate an error.
ERRORS
Under the following conditions, the function
munmap()
fails and sets errno to:
- EINVAL
-
if addr
is not a multiple of the page size as returned by
sysconf.
- EINVAL
-
if addresses in the range
[addr, addr + len)
are outside the valid range for
the address space of a process.
- EINVAL
-
The argument
len
has a value less than or equal to 0.
SEE ALSO
mmap.2
sysconf.3c
Created by unroff & hp-tools.
© by Hans-Peter Bischof. All Rights Reserved (1997).
Last modified 21/April/97
