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MINHERIT(2) FreeBSD System Calls Manual MINHERIT(2) NAME minherit -- control the inheritance of pages SYNOPSIS #include <sys/mman.h> int minherit(void *addr, size_t len, int inherit); DESCRIPTION The minherit() system call changes the specified pages to have the inher- itance characteristic inherit. A page's inheritance characteristic con- trols how it will be mapped in child processes as created by fork(2). The possible inheritance characteristics are: MAP_INHERIT_NONE Pages are not mapped in the child process. MAP_INHERIT_COPY Private copy of pages are mapped in the child process. MAP_INHERIT_SHARE Mapped pages are shared between the parent and child processes. MAP_INHERIT_ZERO New anonymous pages (initialized to all zero bytes) are mapped in the child process. Not all implementations will guarantee that the inheritance characteris- tic can be set on a page basis; the granularity of changes may be as large as an entire region. RETURN VALUES 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. ERRORS The minherit() system call will fail if: [EINVAL] The virtual address range specified by the addr and len arguments is not valid. [EINVAL] The inherit argument is invalid. SEE ALSO madvise(2), mprotect(2), msync(2), munmap(2) HISTORY The minherit() function first appeared in OpenBSD 2.0. FreeBSD 13.0 January 11, 2019 FreeBSD 13.0
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | HISTORY
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