# Copyright (c) 2024 Tenstorrent AI ULC
#
# SPDX-License-Identifier: Apache-2.0

menu "POSIX device I/O"

config POSIX_DEVICE_IO
	bool "POSIX device I/O [EXPERIMENTAL]"
	select EXPERIMENTAL
	select REQUIRES_FULL_LIBC
	select ZVFS
	select ZVFS_POLL
	select ZVFS_SELECT
	help
	  Select 'y' here and Zephyr will provide an implementation of the POSIX_DEVICE_IO Option
	  Group such as FD_CLR(), FD_ISSET(), FD_SET(), FD_ZERO(), close(), fdopen(), fileno(), open(),
	  poll(), pread(), pselect(), pwrite(), read(), select(), and write().

	  For more informnation, please see
	  https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_subprofiles.html

if POSIX_DEVICE_IO

# These options are intended to be used for compatibility with external POSIX
# implementations such as those in Newlib or Picolibc.

config POSIX_DEVICE_IO_ALIAS_CLOSE
	bool
	help
	  When selected via Kconfig, Zephyr will provide an alias for close() as _close().

config POSIX_DEVICE_IO_ALIAS_OPEN
	bool
	help
	  When selected via Kconfig, Zephyr will provide an alias for open() as _open().

config POSIX_DEVICE_IO_ALIAS_READ
	bool
	help
	  When selected via Kconfig, Zephyr will provide an alias for read() as _read().

config POSIX_DEVICE_IO_ALIAS_WRITE
	bool
	help
	  When selected via Kconfig, Zephyr will provide an alias for write() as _write().

endif # POSIX_DEVICE_IO

config POSIX_OPEN_MAX
	int
	default ZVFS_OPEN_MAX
	help
	  The maximum number of files that a process can have open at one time. This option is not
	  directly user-configurable but can be adjusted via CONFIG_ZVFS_OPEN_MAX.

	  For more information, please see
	  https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html

endmenu