Date: Tue, 29 Dec 1998 13:51:01 +0100 From: Marcel Moolenaar <marcel@scc.nl> To: Greg Lehey <grog@lemis.com> Cc: freebsd-emulation@FreeBSD.ORG Subject: Re: linux ps(1) for FreeBSD Message-ID: <3688D035.48F8542B@scc.nl> References: <3688B050.B0E97AA9@scc.nl> <19981229212208.V32696@freebie.lemis.com>
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Greg Lehey wrote:
> Do you have more details?
for example:
The Web Request Broker (WRB) is started by:
owsctl start wrb
The owsctl script eventually executes wrbctl.
wrbctl starts a number of processes, of which mnaddrsrv is the first.
When mnaddrsrv is launched, wrbctl executes:
sh -c (/bin/ps pw 22708 2>/dev/null| grep mnaddrsr)
sh in this case is a linux binary (bash), so /bin/ps is in fact
/compat/linux/bin/ps.
/compat/linux/bin/ps is a script I made to debug OAS:
#!/bin/sh
echo $* > /tmp/ps.args
if [ "x$1" = "xpw" ]; then
shift
/bin/ps -ww -p $*
else
/bin/ps -wwx
fi
grep reads on stdin:
22712 grep GIO fd 0 read 93 bytes
" PID TT STAT TIME COMMAND
22708 ?? Ss 0:00.07 /oracle/ows/3.0/bin/mnaddrsrv -D
"
wrbctl reads on the pipe:
22700 wrbctl GIO fd 4 read 59 bytes
"22708 ?? Ss 0:00.07 /oracle/ows/3.0/bin/mnaddrsrv -D
"
wrbctl now knows the process is running and records the pid in a file.
Multiple WRB instances can be started concurrently, so mnaddrsrv can be
running more than once. By using the recorded pid and ps|grep, wrbctl can
monitor the status of each instance.
The admin web server is started by:
owsctl start admin
owsctl start wrbctl again. wrbctl now reads a couple of config files and runs
(I think):
sh -c (ps efw | grep wrbdm)
... For some reason oraweb is still started and blocks on
linux_socketcall(LINUX_SENDMSG,...), possibly awaiting the creation of some
other process, which wasn't created in the time I ate my lunch.
marcel
ps: linux_socketcall(LINUX_SENDMSG, ...) and linux_socketcall(LINUX_RECVMSG,
...) aren't implemented. I'm running my own patches. See PR 9232.
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