Kernel changes:
- reinstalled priority changing, now in sched() and unready()
- reinstalled check on message buffer in sys_call()
- reinstalled check in send masks in sys_call()
- changed do_fork() to get new privilege structure for SYS_PROCs
- removed some processes from boot image---will be dynamically started later
Ben Gras [Fri, 22 Jul 2005 18:28:32 +0000 (18:28 +0000)]
. added cd-probe logic; tries to find the right root filesystem
if the boot monitor parameter is set. it also sets a boot monitor
parameter (by talking to the PM) so userland knows it.
. ramdisk copy code made slightly smarter
. various select() prettifications (work in progress)
- Fixed comments in various system call handlers. Work in progress on new
sys_privctl() call to dynamically start servers and drivers.
- Shutdown sequence slightly adjusted: called as watchdog timer to let the
busy sys_abort() call from the PM return first.
- Changed umap_bios() to have more restrictive check: BIOS memory is now
allowed in BIOS_MEM_BEGIN to END (interrupt vectors) and BASE_MEM_TOP
to UPPER_MEM_END. Hopefully this keeps QEMU and Bochs happy.
Removed 'tracing' flag from sys_exec. Logic is now local to PM.
Changed variable names in timers libary. Wrote new comments for
timers.h header file with explanation.
Various fixes and improvements.
- fixed bug that caused IDLE to panic (irq hook inconsistency);
- kprintf() now accepts multiple arguments; moved to utility.c;
- prepare_shutdown() signals system processes with SIGKSTOP;
- phys_fill() renamed to phys_memset(), argument order changed;
- kmemset() removed in favor of phys_kmemset();
- kstrncpy() removed in favor of phys_copy();
- katoi, kstrncmp replaced by normal library procedure again;
- rm_irq_handler() interface changed (simply pass hook pointer);
Added new signal types for kernel events:
- SIGKMESS: new kernel message (sent to TTY, IS, or LOG)
- SIGKSTOP: MINIX is shut down (sent to TTY-> switch to primary console)
- SIGKSIG: kernel signals pending (sent to PM)
System processes can be signaled; signals are transformed in SYS_EVENT message
that passes signal map along. This mechanisms is also used for nonuser signals
like SIGKMESS, SIGKSTOP, SIGKSIG.
Revised comments of many system call handlers. Renamed setpriority to nice.
Removed PM signon for INET. Now daemonized in /usr/etc/rc.
SIGTRAP generated in PM (where it belongs / no longer in kernel).
Updated Makefiles: servers are now installed in /usr/sbin.
New alarm(2) timers mechanism.
Kernel no longer keeps track of user alarms on behalf of the PM.
Instead, the PM maintains its own list of watchdog timers, and
uses one synchronous alarm (at the kernel) to get notifications
for expired user timers.
Renamed various system calls.
Cleaned up system call library.
Added new alert() trap to replace notify() --- current notify will be removed
and alert() will be called notify() later.
Reorganized system call library; uses separate file per call now.
New configuration header file to include/ exclude functionality.
Extracted privileged features from struct proc and create new struct priv.
Renamed various system calls for readability.
Ben Gras [Wed, 13 Jul 2005 14:58:21 +0000 (14:58 +0000)]
Made timeout and no. of errors in at_wini dynamically settable
by ioctl; made catch-all function in driver table also called when
unrecognized ioctl called, so drivers can add their own ioctl codes.
Ben Gras [Wed, 13 Jul 2005 14:46:11 +0000 (14:46 +0000)]
Fixed a bug in kstrncpy() that caused mayhem whenever the buffer to be
copied into was the same size as the source string - it will keep on
filling with zeroes forever. This was a signed/unsigned bug, fixed by
making the kstrncpy argument ssize_t instead of size_t. This bug was
triggered by Chris Young <teddga@earthlink.net>, by dazzling coincedence -
changing OS_VERSION into something with one more character (exactly the
same size as the buffer in the kinfo struct).
Also noticed that the kstrncpy() call didn't null-terminate the strings
if necessary, also fixed.
Ben Gras [Fri, 8 Jul 2005 17:30:01 +0000 (17:30 +0000)]
kernel and servers send diagnostic messages to IS; IS sends them to TTY
and the new log driver if enabled.
new usyslogd is started from /usr/etc/rc. New device created by
MAKEDEV.sh. /var/log created by etc/mtree/minix.tree (on root for
now). Made select() slightly more generic, with less code duplication.