Setup for NIS master: make isn't seeing my sources
[I'm not subscribed to -questions, so please include me in responses. I've provided a valid Reply-To as a hint to your MUA.] For the last 14 years or so, my NIS server on the home network has been a SPARCstation 5/170 running Solaris 2.6; I'm finally getting around to decommissioning it. Accordingly, I'm configuring a new(-ish) machine running FreeBSD 8.1-PRERELEASE r210217 (as of Sunday last) as a new NIS master. (I had earlier configured it as a slave, so /var/yp/`domainname` was already populated.) The NIS domain is (for historical reasons) lmdhw.com. The default in /var/yp/Makefile is for YPSRCDIR to be set to /etc; as I prefer my NIS source files to be completely separate from the content of /etc on any machine I fcreated /var/yp/Makefile.local: albert# pwd /var/yp albert# cat Makefile.local # Local tweaks to NIS make process # $Id: Makefile.local,v 1.1 2010/07/23 18:51:37 root Exp $ # As long as we still have non-FreeSBD NIS clients on the local net... UNSECURE = True # Keep our NIS sources separate from any machine's /etc. # While we're doing that, might as well make provision in case we want to # work with more than one NIS domain at the same time. YPSRCDIR = $(YPDIR)/etc/$(DOMAIN) I then populated /var/yp/etc/lmdhw.com by unpacking a tarball of the sources from the SS5: albert# domainname lmdhw.com albert# ls -lTa etc/lmdhw.com/ total 38 drwxr-xr-x 3 root daemon 512 Jul 23 11:53:52 2010 . drwxr-xr-x 3 root wheel512 Jul 23 11:44:37 2010 .. drwxr-xr-x 2 root daemon 512 May 10 10:06:43 2010 RCS -rw-r--r-- 1 root kmem 50 Jan 12 20:09:53 1997 auto_home -rw-r--r-- 1 root kmem 94 Jan 12 20:10:08 1997 auto_master -rw-rw-r-- 1 root daemon 0 Sep 14 11:53:16 1997 bootparams -rw-rw-r-- 1 root daemon 0 Sep 14 11:53:16 1997 ethers -r--r--r-- 1 root daemon 428 Sep 2 18:19:02 2001 group -r--r--r-- 1 root daemon 273 Oct 25 15:33:32 2008 hosts -rw-rw-r-- 1 root daemon 0 Sep 14 11:53:16 1997 netgroup -r--r--r-- 1 root daemon 592 Aug 26 21:53:00 1999 netmasks -r--r--r-- 1 root sys 372 Mar 4 21:46:19 1997 networks -r--r--r-- 1 root daemon 855 Nov 30 21:51:03 2009 passwd -rw-r--r-- 1 root daemon 892 May 3 19:11:13 1998 passwd.install -r--r--r-- 1 root sys 980 Apr 4 18:14:32 1998 protocols -r-xr-xr-x 1 bin kmem 622 Mar 4 22:04:36 1997 publickey -rw-r--r-- 1 root sys 1481 Mar 4 21:46:29 1997 rpc -r--r--r-- 1 root daemon 2380 Jul 19 18:48:02 1998 services -r 1 root daemon 364 Oct 6 16:31:39 2006 shadow -rw-r--r-- 1 root daemon 416 May 3 19:11:28 1998 shadow.install -rw-r--r-- 1 root daemon21 Apr 4 23:32:06 1998 timezone albert# But when I run make, I see whines about /var/yp/etc/`/bin/domainname`/hosts being non-existent and having no sources: albert# make -d lm Examining target...non-existent...non-existent and no sources...out-of-date. if [ ! -d `/bin/domainname` ]; then mkdir `/bin/domainname`; fi; cd `/bin/domainname` ; echo NIS Map update started on `date` for domain `/bin/domainname` ; make -f ../Makefile all; echo NIS Map update completed. NIS Map update started on Fri Jul 23 13:37:30 PDT 2010 for domain lmdhw.com Examining /var/yp/ypservers...modified 11:53:28 Jul 23, 2010...up-to-date. Examining ypservers...modified 11:53:55 Jul 23, 2010...up-to-date. Examining servers...non-existent...modified before source (ypservers)...out-of-date. update time: 13:37:30 Jul 23, 2010 Examining /var/yp/etc/`/bin/domainname`/hosts...non-existent...non-existent and no sources...out-of-date. make: don't know how to make /var/yp/etc/`/bin/domainname`/hosts. Stop *** Error code 2 Stop in /var/yp. albert# I've run with additional debugging flags, but that seemed to merely add to the clutter without actually providing useful information, so I figured I'd skip subjecting y'all to that for now. So what silly thing am I overlooking here? Is something doing a chroot(2) behind the scenes? Thanks Peace, david -- David H. Wolfskill da...@catwhisker.org Depriving a girl or boy of an opportunity for education is evil. See http://www.catwhisker.org/~david/publickey.gpg for my public key. pgpzAkWz3EREZ.pgp Description: PGP signature
Re: tar fails on FreeBSD 7 and passes on FreeBSD 6 for the same input
On Tue, Jan 20, 2009 at 01:24:41PM +0530, chandra reddy wrote: Hi, I am getting the following error when i run tar on a directory. [chan...@home]$ tar zcf config-xsl.tar config-xsl/9.6 tar: Cannot open directory config-xsl/9.6/configuration/protocols/mpls/label-switched-path/oam/bfd-liveness-detection/detection-time: No such file or directory tar: Cannot open directory ... FreeBSD chandra 7.1-RC1 FreeBSD 7.1-RC1 #0: Sun Dec 7 05:57:33 UTC 2008 r...@logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 I have debugged libc and found that system call fstafs is failing and returning -1. I believe you will find that the system call is fstatfs. Can any one help me what is the real problem here and how to fix it? A subsequent message of your verified that the hierarchy being read was on an NFS-mounted file system. Perchance, was that NFS mount managwed by amd(8)? If so, while I do not have a fix for you, I am relieved to see someone else finally report these symptoms. Please see http://docs.FreeBSD.org/cgi/mid.cgi?20081203001538.GC96383 for an archived copy of my initial message in a thread reporting this. There is additional detail (including kernel trace information how-to-repeat instructions) in subsequent messages in the thread. Also mentioned is a circumvention -- basically, crippling amd(8) so it no longer attempts to unmount() a file system. However, I was unable to re-create the symptoms at home -- only at work. A colleague at work was able to re-create the symptoms, and was intending to experiment a bit more, but he's been busy with other things recently. Please contact me (off-list, if you prefer), and we can discuss additional details. Peace, david -- David H. Wolfskill da...@catwhisker.org Depriving a girl or boy of an opportunity for education is evil. See http://www.catwhisker.org/~david/publickey.gpg for my public key. pgpRgd7rWpQt3.pgp Description: PGP signature
Re: switching bsdlabel's label
On Tue, Jan 20, 2009 at 03:36:34PM -0200, Eduardo Meyer wrote: ... Why not simply use bsdlabel -e da0s1? Because I didnt know about that? ;-) Thank you for the hint. However I still have the same doubt. Since basically its the same task, Is it safe do relabel this way? I have done it several times without any problems. Do, however, ensure that your /etc/fstab entries match the result before you reboot; attempting a mount by hand (merely specifying either the mount point or the device, but not both) before your next reboot can serve as a useful reality check. Peace, david -- David H. Wolfskill da...@catwhisker.org Depriving a girl or boy of an opportunity for education is evil. See http://www.catwhisker.org/~david/publickey.gpg for my public key. pgpL5iCUbcJ8Z.pgp Description: PGP signature
Shell scripts: variable assignment within read loops
I am writing a (Bourne) shell script that is intended (among other
things) to obtain information from a command, such as:
netstat -nibd -f inet
by reading and parsing the output.
However, the obvious (to me) approach of piping the output of the
command to the standard input of a while read ... statement turns out
to be not very useful; it appears that while
foo=
while read bar ... ; do
...
foo=$bar
...
done $filename
echo $foo
will assign to foo the value of the bar variable form the last record
read (in FreeBSD 6.3-STABLE, at least), the following fails to do so:
foo=
cat $filename | while read bar ... ; do
...
foo=$bar
...
done
echo $foo
Well, that's not *quite* accurate:the assignment is done all right, but
in the latter case, it appears to be done in a subshell, so by the time
we get to the echo statement, any variable assignments from within the
read loop have vanished.
Here's a cut/pasted, somewhat contrived example:
#! /bin/sh
foo=0
echo 0 foo: $foo
while read line; do
echo 1.0 foo: $foo
foo=1$line
echo 1.1 foo: $foo
done /etc/resolv.conf
echo 2 foo: $foo
echo
foo=2
echo 3 foo: $foo
eval cat /etc/resolv.conf | grep '.'
cat /etc/resolv.conf | while read line; do
echo 4.0 foo: $foo
foo=3$line
echo 4.1 foo: $foo
done
echo 5 foo: $foo
exit 0
and its output on my laptop:
0 foo: 0
1.0 foo: 0
1.1 foo: 1search catwhisker.org
1.0 foo: 1search catwhisker.org
1.1 foo: 1nameserver 172.16.8.12
1.0 foo: 1nameserver 172.16.8.12
1.1 foo: 1nameserver 172.16.8.11
1.0 foo: 1nameserver 172.16.8.11
1.1 foo: 1nameserver 172.16.8.1
2 foo: 1nameserver 172.16.8.1
3 foo: 2
search catwhisker.org
nameserver 172.16.8.12
nameserver 172.16.8.11
nameserver 172.16.8.1
4.0 foo: 2
4.1 foo: 3search catwhisker.org
4.0 foo: 3search catwhisker.org
4.1 foo: 3nameserver 172.16.8.12
4.0 foo: 3nameserver 172.16.8.12
4.1 foo: 3nameserver 172.16.8.11
4.0 foo: 3nameserver 172.16.8.11
4.1 foo: 3nameserver 172.16.8.1
5 foo: 2
Note that the 2 foo line shows a value read from the last line of
/etc/resolv.conf, while the 5 foo line fails to do so. (In a Solaris
9 environment, the output from each stanza is the same as the output
from teh second stanza in FreeBSD.)
Now here's a copy of the in-development script:
#! /bin/sh
cmd=netstat -nibd -f inet
ctr=0
clist=
hlist=`$cmd | head -1`
for f in $hlist; do
ctr=$(( $ctr + 1 ))
eval c$ctr=\$f\
eval h_$f=c$ctr
done
cmax=$ctr
t_file=`mktemp /tmp/X`
$cmd | tail +2 $t_file
while read $hlist dummy; do
if [ $Name = lo0 ]; then
continue
fi
for f in $hlist; do
eval val=\\$$f\
case $val in
-) eval ${f}_$Name=0;;
*) eval ${f}_$Name=$val;;
esac;
done
nics=$Name $nics;
done/$t_file
rm $t_file
echo (end) NICs: $nics
for n in $nics; do
for f in $hlist; do
eval echo ${f}_$n: \$${f}_$n
done
done
exit 0
And its output on my laptop:
(end) NICs: ath0
Name_ath0: ath0
Mtu_ath0: 1500
Network_ath0: 172.17
Address_ath0: 172.17.1.30
Ipkts_ath0: 725191
Ierrs_ath0: 0
Ibytes_ath0: 185144197
Opkts_ath0: 821917
Oerrs_ath0: 0
Obytes_ath0: 74260936
Coll_ath0: 0
Drop_ath0: 0
and (somewhat more interestingly) on my firewall machine:
(end) NICs: dc0 de0 fxp0
Name_dc0: dc0
Mtu_dc0: 1500
Network_dc0: 172.16.8/24
Address_dc0: 172.16.8.1
Ipkts_dc0: 2501577
Ierrs_dc0: 0
Ibytes_dc0: 215386153
Opkts_dc0: 20269087
Oerrs_dc0: 0
Obytes_dc0: 2553930555
Coll_dc0: 0
Drop_dc0: 0
Name_de0: de0
Mtu_de0: 1500
Network_de0: 63.193.123/24
Address_de0: 63.193.123.122
Ipkts_de0: 5936847
Ierrs_de0: 0
Ibytes_de0: 734092787
Opkts_de0: 18557543
Oerrs_de0: 0
Obytes_de0: 2551089632
Coll_de0: 0
Drop_de0: 0
Name_fxp0: fxp0
Mtu_fxp0: 1500
Network_fxp0: 172.17
Address_fxp0: 172.17.0.1
Ipkts_fxp0: 10013
Ierrs_fxp0: 0
Ibytes_fxp0: 1366082
Opkts_fxp0: 1253115
Oerrs_fxp0: 0
Obytes_fxp0: 70429903
Coll_fxp0: 0
Drop_fxp0: 0
As you see, I am circumventing the issue by writing to a transient file.
In the intended application, the script is to be used to gather
resource-utilization information; thus, I want its footprint to be
smaller, rather than larger. Granted, in my case, I would be writing a
tiny text file to a swap-backed tmpfs, but in production, I won't have
the luxury of knowing that in advance: the intent is that the script
must run on a minimal FreeBSD system, with no ports or other 3rd-party
software installed.
Is there some other -- possibly better -- way to do this (using Bourne
shell scripting)?
Thanks!
(Please select recipients for your replies carefully: I'm not subscribed
to -questions. I've provided a hint in the form of a Reply-To header,
though I realize that not all mailers honor it. Please do include me in
replies.)
Peace,
david
--
David H. Wolfskill [EMAIL PROTECTED]
Depriving a girl or boy of an opportunity for education is evil.
See http://www.catwhisker.org/~david/publickey.gpg for my public
Re: Shell scripts: variable assignment within read loops
On Mon, Aug 18, 2008 at 06:29:03AM +0300, Giorgos Keramidas wrote:
...
You are right that feeding data to a looping construct through a pipe
may run in a subshell. The ``Single UNIX Specification'' says
Ah; thanks for the confirmation.
...
What I usually do in similar shell scripts is something like:
cat ${filename} | sed -n -e '/foo/ s/bar/baz/' | \
xargs -n1 blah
This isn't exactly the same as assigning $foo to the results of the
loop, but you can also use:
foo=`cat $filename | while read bar ; do \
stuff ...
echo $bar
more stuff...
done`
Right; I had seen that type of construct in /etc/rc.d.* (which is where
I often look for samples of shell scripts that need to work reliably).
As you noticed, that won't quite do for what I'm trying to accomplish here.
...
As you see, I am circumventing the issue by writing to a transient
file. In the intended application, the script is to be used to gather
resource-utilization information; thus, I want its footprint to be
smaller, rather than larger. Granted, in my case, I would be writing
a tiny text file to a swap-backed tmpfs, but in production, I won't
have the luxury of knowing that in advance: the intent is that the
script must run on a minimal FreeBSD system, with no ports or other
3rd-party software installed.
Is there some other -- possibly better -- way to do this (using Bourne
shell scripting)?
Ah, that's much better. Now I see what you are trying to do.
:-)
Would you be ok with an awk(1) script instead of /bin/sh? It tends
to be nicer for this sort of thing, i.e.:
Yes, awk(1) would be OK. I'll be more inclined to use it if I can
figure out a way to use it instead of sed(1) for a very different part
of the script. :-}
$ expand david.awk | cat -n
1 #
2 # Gather the field names if this is a header-line.
3 #
4 $0 ~ /^Name/ {
5 for (k = 1; k = NF; k++)
6 tag[k] = $k;
7 }
8
9 #
10 # For all other lines, just print the tagged field values.
11 #
12 $0 !~ /^Name/ {
13 name = $1;
14 for (k = 1; k = NF; k++) {
15 if ($k == -)
16 $k = 0;
17 printf %s_%s: %s\n, tag[k], name, $k;
18 }
19 }
$ netstat -nibd -f inet | awk -f david.awk
Name_re0: re0
Mtu_re0: 1500
Network_re0: 192.168.1.0/2
...
Very cool; thank you very much! I will study that a bit
(I'd normally do this stuff in Perl, but in addition to the other issues
mentioned earlier, the script will be sleeping most of the time, but
wake up spit out results periodically. The usual case will be every 5
minutes, but I plan to make use of it with radically shorter periods in
certain specialized environments -- such as every 5 seconds. And I
still want it to be low overhead. I also note in passing that in its
production environments, the script's standard output will be
redirected to append to a file on a different machine via an SSH tunnel.)
With a bit of preprocessing, it may be possible to extract the network
names and print the (end) NICs: XXX XXX part too.
Right -- much of the output I demonstrated was strictly for debugging/
expository purposes.
Thanks again, Giorgos!
Peace,
david
--
David H. Wolfskill [EMAIL PROTECTED]
Depriving a girl or boy of an opportunity for education is evil.
See http://www.catwhisker.org/~david/publickey.gpg for my public key.
pgpQZk6NuCeRc.pgp
Description: PGP signature
Re: IPFW Problems?
On Mon, Apr 17, 2006 at 06:29:13PM -0400, Charles Swiger wrote: ... [ ...redirected to freebsd-questions... ] Thanks for doing that! ... You don't have a check-state rule anywhere, so you either need to add one or a rule to pass established traffic to and from port 22. I thought check-state was fairly optional; ref: These dynamic rules, which have a limited lifetime, are checked at the first occurrence of a check-state, keep-state or limit rule, and are typ- ically used to open the firewall on-demand to legitimate traffic only. See the STATEFUL FIREWALL and EXAMPLES Sections below for more informa- tion on the stateful behaviour of ipfw. (from man ipfw on a 4.11 system). Peace, david -- David H. Wolfskill [EMAIL PROTECTED] Mail filters, like sewers, need to be most restrictive at the point of entry. See http://www.catwhisker.org/~david/publickey.gpg for my public key. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
What's so special about /dev/vn0a?
Seems that I can't refer - explicitly -- to partition a of a partitioned vnode disk if it's assigned /dev/vn0. If I assign it /dev/vn1, no problem. If I change the name of the partition to b, no problem. I can even just refer to it as /dev/vn0, and /dev/vn0a gets selected. So I'm a tad puzzled. This isn't the End Of The World As We Know It, but the apparent lack of consistency is ... curious, at least. I'm running 4.9-R, recompiled mostly to get device vn in the kernel: %uname -a FreeBSD frecnocpc10.noc.egation.com 4.9-RELEASE FreeBSD 4.9-RELEASE #0: Thu Nov 13 13:17:27 PST 2003 [EMAIL PROTECTED]:/usr/src/sys/compile/MADCASTER i386 %sudo vnconfig -s labels -c vn0 vn_jail %sudo disklabel -r vn0 | tail Password: track-to-track seek: 0 # milliseconds drivedata: 0 8 partitions: #size offsetfstype [fsize bsize bps/cpg] a:1600004.2BSD 2048 16384 107 # (Cyl.0 - 7*) c: 26624000unused0 0 # (Cyl.0 - 1299) e:16000160004.2BSD 2048 16384 107 # (Cyl.7*- 15*) g: 400320004.2BSD 2048 16384 107 # (Cyl. 15*- 15*) h: 263324004.2BSD 2048 1638490 # (Cyl. 15*- 1299*) %sudo df /dev/vn0 Filesystem 1K-blocks UsedAvail Capacity Mounted on /dev/vn07822 6572 62691% %sudo df /dev/vn0a df: /dev/vn0a: Device not configured %sudo vnconfig -u vn0 %sudo vnconfig -s labels -c vn1 vn_jail %sudo df /dev/vn1 Filesystem 1K-blocks UsedAvail Capacity Mounted on /dev/vn17822 6572 62691% %sudo df /dev/vn1a Filesystem 1K-blocks UsedAvail Capacity Mounted on /dev/vn1a 7822 6572 62691% %sudo vnconfig -u vn1 % I admit that I've done but the most cursory of reality checks, but come up empty-handed. Is this intentional? I'm certainly willing to submit a PR if it's broken; indeed, I'm willing to go poke around in the code and try to understand where things are going wrong -- but I'd rather avoid that exercise if this really is working as designed. Thanks, david -- David H. Wolfskill [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
