POSIX implementation specifics

Support

Support for KasperskyOS

KasperskyOS Community Edition

KasperskyOS API

POSIX support

POSIX implementation specifics

May 21, 2024

ID posix_ifaces_impl_features

Save as PDF

In KasperskyOS, the specific implementation of some POSIX interfaces not entirely defined by the POSIX.1-2008 standard differs from the implementation of these interfaces in Linux and other UNIX-like operating systems. Information about these interfaces is provided in the table below.

POSIX interfaces and their implementation specifics

Interface	Purpose	Implementation	Header file based on the POSIX.1-2008 standard
`bind()`	Assign a name to a socket.	When using a VFS version that supports only network operations, files of sockets in the `AF_UNIX` family are saved in a special file system implemented by this VFS version when `bind()` is called. A socket file can be created only in the root of the file system or in the `/tmp` directory, and it can be re-used after the socket is closed.	`sys/socket.h`
`mmap()`	Map to memory.	Mapping more than 4 GB is not supported on hardware platforms running an AArch64 (ARM64) processor architecture.	`sys/mman.h`
`read()`	Read from a file.	If the size of the `buf` buffer exceeds the size of the read data, the remainder of this buffer is filled with zeros.	`unistd.h`

Did you find this article helpful?

What can we do better?

Thank you for your feedback! You're helping us improve.