and CPU runtime because it can't access the user area via /proc/<pid>/mem.
This is because the uarea is not mapped into the process address space
at USRSTACK on the alpha like it is on the x86.
Since I'm haven't been able to wrap my brain around the VM system enough
to be able to figure out how to achieve this mapping, and since it's
questionable that such an architectural change is correct, I implemented
a workaround to allow ps(1) to read the uarea from /dev/kmem using
kvm_read() instead of from the process address space via kvm_uread().
The kludge is hidden inside #ifdef __alpha__/#endif so as not to impact
the x86. (Note that top(1) probably uses this same gimmick since it works
on FreeBSD/alpha.)
Reviewed by: dfr
This takes the conditionals out of the code that has been tested by
various people for a while.
ps and friends (libkvm) will need a recompile as some proc structure
changes are made.
Submitted by: "Richard Seaman, Jr." <dick@tar.com>
Submitted by: "Richard Seaman, Jr." <lists@tar.com>
Obtained from: linux :-)
Code to allow Linux Threads to run under FreeBSD.
By default not enabled
This code is dependent on the conditional
COMPAT_LINUX_THREADS (suggested by Garret)
This is not yet a 'real' option but will be within some number of hours.
Use /dev/null for opening the kvm library, we don't need access to /dev/mem
anymore.
ps can now run without the setgid(kmem) bit. If it does it will not be
able to show argv/envp for another uid's processes unless you are root.
Clean up (or if antipodic: down) some of the msgbuf stuff.
Use an inline function rather than a macro for timecounter delta.
Maintain process "on-cpu" time as 64 bits of microseconds to avoid
needless second rollover overhead.
Avoid calling microuptime the second time in mi_switch() if we do
not pass through _idle in cpu_switch()
This should reduce our context-switch overhead a bit, in particular
on pre-P5 and SMP systems.
WARNING: Programs which muck about with struct proc in userland
will have to be fixed.
Reviewed, but found imperfect by: bde
for users who are root, or in group wheel. This is useful on large timesharing
systems where a PS command can cause the system to grind to a halt. The
ability to get the information isn't diminished for those who really need the
additional detail (administrators.) Normal users won't see any difference unless
the processes are swapped out. The "really get it mode" is invoked by the
use of an additional flag in the command string "-f". New/old behavior is
selectable with a compile option.
PR: 5196
Submitted by: Matt Dillon <dillon@best.net>
VM structure (eg: credentials etc) and it's highly unlikely we'll ever
get to see the "tainted" BSD<=4.3 VM code in public use. Although it
indicated the way some things used to be done, it obfuscates things too
much.
appears, not the longest _maximum_ username (this should probably also go
into 2.2, for the day when we bump up the username length there too).
Submitted-By: Terry Lambert <terry@lambert.org>
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
the full argument vector.
I've bumped into a few things that expected this switch to be present,
the most recent was the snmp package in ports. I'm not 100% sure of the
origins of this, but Linux has it, so does the "BSD-compatable" version
of ps on our SVR4 systems (so I assume SunOS has it too).
. mention the need for procfs
. make it clear that default sorting is first by ctty, then by PID
Submitted by: schweikh@ito.uni-stuttgart.de (Jens Schweikhardt)
list the processes belonging to a particular user without having to use
`-u' and grepping for the username. Basically you can now get a short
`ps -x' like list (with more space for the command) for other users.
allow more than two tty characters.
David Greenman pointed out that when a process that had been revoked from
it's controlling tty, the "-" sign was detached from any two-character
names.
This gives us more room to breath with tty names, especially with drivers
that support large numbers of ports.. eg: specialix and digiboard.
This does not actually change the current tty names, it just allows room
for reporting more characters if the drivers use them.
/usr/src/bin. Note that some patches are still needed in that directory.
I (Joerg) finished most of Philippe's cleanup. /bin/sh will still
need *allot* of work, however.
Submitted by: charnier@lirmm.fr (Philippe Charnier)
You can get ps easily to core dump, if you are running a "make depend"
on a kernel in one window and a "ps -auxww" in another. The ww will
try to give you the full argument list of the command that can
now be 64Kb large, but ps expected only 4Kb large arg arrays and
doesn't check for overflows.
that old `ps'es did. I'm not too thrilled about this, but I'm not
enough of an FS person to hack procfs so that /proc/xxx/mem is readable
by members of group `kmem'. If this is done, then `ps' can go back to
being set-gid kmem.
