munmap(2) System Calls munmap(2)
NAME
munmap - unmap pages of memory
SYNOPSIS
#include <sys/mman.h>
int munmap(void *addr, size_t len);
DESCRIPTION
The munmap() function removes the mappings for pages in the range [addr, addr + len), rounding the len argument up to the next multiple of
the page size as returned by sysconf(3C). If addr is not the address of a mapping established by a prior call to mmap(2), the behavior is
undefined. After a successful call to munmap() and before any subsequent mapping of the unmapped pages, further references to these pages
will result in the delivery of a SIGBUS or SIGSEGV signal to the process.
The mmap(2) function often performs an implicit munmap().
RETURN VALUES
Upon successful completion, munmap() returns 0; otherwise, it returns -1 and sets errno to indicate an error.
ERRORS
The munmap() function will fail if:
EINVAL The addr argument is not a multiple of the page size as returned by sysconf(3C); addresses in the range [addr, addr + len)
are outside the valid range for the address space of a process; or the len argument has a value less than or equal to 0.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO
mmap(2), sysconf(3C), attributes(5), standards(5)
SunOS 5.10 5 Jan 1998 munmap(2)
