From: Alan Cox <alan@linux.intel.com>
Date: Sun, 8 Nov 2015 17:20:28 +0000 (+0000)
Subject: Levels: first proposal of how we define a "level 1" Fuzix system
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=28f7fa839624cb23e8dbe5cdf63209811239c251;p=FUZIX.git

Levels: first proposal of how we define a "level 1" Fuzix system

We need some kind of line for the smaller 8bit boxes and having everyone with
different random varieties of features will be a support nightmare
---

diff --git a/Kernel/doc/Levels b/Kernel/doc/Levels
new file mode 100644
index 00000000..e235e149
--- /dev/null
+++ b/Kernel/doc/Levels
@@ -0,0 +1,154 @@
+Proposed Features For Each Level
+
+
+Level	1
+---------
+
+System Calls:
+	access
+	alarm
+	brk
+	chdir
+	chmod
+	chown
+	chroot
+	close
+	dup
+	dup2
+	execve
+	_exit
+	fchdir
+	fchmod
+	fchown
+	fcntl
+	flock
+	fork
+	fstat
+	getegid
+	geteuid
+	_getfsys
+	getgid
+	getpgrp
+	getpid
+	getppid
+	getuid
+	ioctl
+	kill
+	link
+	lseek
+	mkdir
+	mknod
+	mount
+	nice
+	open
+	pause
+	pipe
+	read
+	rename
+	rmdir
+	sbrk
+	sched_yield	
+	setgid
+	setpgrp
+	setuid
+	sigdisp
+	signal
+	stat
+	stime
+	sync
+	_time
+	times
+	uadmin
+	umask
+	umount
+	_uname
+	unlink
+	utime
+	waitpid
+	write
+
+Signals (kernel properties)
+	SIGHUP
+	SIGINT
+	SIGQUIT
+	SIGILL
+	SIGABRT
+	SIGBUS
+	SIGFPE
+	SIGKILL
+	SIGPIPE
+	SIGALRM
+	SIGTERM
+	SIGSTKFLT
+	SIGCONT		}	Need completing
+	SIGSTOP		} 
+
+Terminal
+	VMIN
+	VEOF
+	VTIME
+	VERASE
+	VINTR
+	VKILL
+	VQUIT
+	VSTART
+	VSTOP
+	At least 132 bytes buffer
+
+Filesystem
+	PATH_MAX 512+
+
+Level	2
+---------
+
+Features:
+	Core dumps
+	Job control		
+
+Potential System Calls:
+	acct
+	get/setgroups
+	memalloc
+	memfree
+	profil
+	select
+	ulimit/rlimit
+	rusage
+	sigaction() and further POSIX features (but which need to be in L1)
+	(sighold/sigignore/sigpause etc)
+
+Signals
+	SIGCHLD		(???)
+	SIGTSTP
+	SIGTTIN
+	SIGTTOU
+	SIGXCPU
+	SIGXFSZ
+	SIGVTALRM
+	SIGPROF
+	SIGWINCH	(???)
+	SIGIO
+	SIGPOLL
+
+Terminal
+	VSUSP
+	VDSUSP
+	VLNEXT		(???)
+	Pty pairs
+	256 byte input buffer (POSIX compliant)
+
+Filesystem
+	Look at fs switch options for bigger boxes
+	Asynchronous I/O (? - probably not worth it)
+	POSIX shared memory on flat memory/bigger boxes
+	Symbolic links ?
+	True pathconf/fpathconf if fs switch
+	True directory scanning funcs
+	Proper full PATH_MAX
+
+
+Independent Add On Chunks
+-------------------------
+
+TCP/IP	(but really also needs to include select/poll)
+