MINHERIT(2) | System Calls Manual | MINHERIT(2) |
minherit
— control
the inheritance of pages
#include
<sys/mman.h>
int
minherit
(void
*addr, size_t len,
int inherit);
The
minherit
()
system call changes the specified pages to have the inheritance
characteristic inherit. A page's inheritance
characteristic controls how it will be mapped in child processes as created
by fork(2).
The possible inheritance characteristics are:
MAP_INHERIT_NONE
MAP_INHERIT_COPY
MAP_INHERIT_SHARE
MAP_INHERIT_ZERO
Not all implementations will guarantee that the inheritance characteristic can be set on a page basis; the granularity of changes may be as large as an entire region.
Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
The minherit
() system call will fail
if:
The minherit
() function first appeared in
OpenBSD 2.0.
January 11, 2019 | OpenBSD-current |