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Date: 17 Aug 90 06:26:00 MDT
From: info-unix at BRL.MIL
Subject: INFO-UNIX Digest V10#119
To: "jnjortn" <jnjortn at ceratiidae.cs.sandia.gov>
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From: The Moderator (Mike Muuss) <Info-Unix-Request at BRL.MIL>
To: INFO-UNIX at BRL.MIL
Reply-To: INFO-UNIX at BRL.MIL
Subject: INFO-UNIX Digest V10#119
Message-ID: <9008170545.aa01300 at SEM.BRL.MIL>
INFO-UNIX Digest Fri, 17 Aug 1990 V10#119
Today's Topics:
Re: Recursion without -R
Re: need help with FATAL error in unix 3.2u
Coherent info
Re: Coherent info
Sys V or BSD for PDP 11/73 Wanted
Re: More questions about how to issue a C-SHELL command within a C program
Re: What's wrong with this Bourne shell script?
Re: Cshell question: taking wordlists as a single string
Re: Timeout on shell command.
Printing with terminalservers
Re: getting the exit value of an exec'd program
Help on tools like SCCS, SPRs etc..
extracting files from a tar file
Re: Cshell question. Or: How to make a fool of yourself
Sending mail with explicit INTERNET address
Re: Spy Programs??
Looking for a BCD library for Unix / C
/-happy
Re: /-happy
Re: redirecting standard i/o from an exec'ed programme
Unix supporting HANGUL (Korean) avail?
Re: help sought - securing a terminal/line
LaserWriter II printcap entry needed
Looking for an adduser script.
Changing back slashes to forward slashes
Re: Changing back slashes to forward slashes
addcol - # [Was: Re: What's wrong with this Bourne shell script?]
Re: Converting to uppercase/lowercase in sed
Re: MACH stripped from AT&T code ?
sort with a tab as separator
-----------------------------------------------------------------
From: micah altman <micah at sgi.com>
Subject: Re: Recursion without -R
Date: 15 Aug 90 17:53:22 GMT
Sender: Net News <news at odin.corp.sgi.com>
To: info-unix at sem.brl.mil
In article <KAUL.90Aug14205729 at icarus.eng.ohio-state.edu> kaul at icarus.eng.ohio-state.edu (Rich Kaul) writes:
>In article <13595 at ulysses.att.com> swfc at ulysses.att.com (Shu-Wie F Chen) writes:
> find . -print | xargs chown foo
>
> Of course, this only works if you have xargs, which is from System V and
> is also available on SunOS in their System V software installation option.
...
>
If your version of find supports the -exec option you could
recursively step through files and change the owner to "foo"
by issueing the command
find . -exec chown foo {} \;
( And yes, the "\;" at the end is necessary )
- Micah Altman
Computational Juggler
-----------------------------
From: "Dik T. Winter" <dik at cwi.nl>
Subject: Re: Recursion without -R
Date: 16 Aug 90 10:43:13 GMT
Sender: news at cwi.nl
To: info-unix at sem.brl.mil
In article <1990Aug15.175322.23868 at odin.corp.sgi.com> micah at sgi.com (micah altman) writes:
> find . -exec chown foo {} \;
>
And do this only if user foo is in the local password file, not if foo is
known through yellow pages.
--
dik t. winter, cwi, amsterdam, nederland
dik at cwi.nl
-----------------------------
From: "Andrew A. Burgess" <aab at cichlid.com>
Subject: Re: need help with FATAL error in unix 3.2u
Keywords: parity error, NMI, floppy access, gateway2000
Date: 15 Aug 90 19:34:16 GMT
To: info-unix at sem.brl.mil
In article <601 at bigbroth.UUCP> rk at bigbroth.UUCP (rohan kelley) writes:
>Problems with unix 3.2u BellTech (Interactive) installation in
>Gateway2000-25 cache system.
>
>Error message:
>FATAL:Parity error on the motherboard
>PANIC:Parity error address unknown
> Trying to dump 1024 pages (etc)
...
>Crash occurs when accessing the floppy drive (either 0 or 1) but only
>at intermittent times. Commands current have been cpio and format. If
...
I had a similar problem with an old AMI motherboard once. I first noticed that
it would drop about one byte per million when reading from the tape drive.
Repeating the read was successful. Note that there were no error messages
from the tape drive -- it thought the tape had read correctly. I only became
aware of a problem when doing a compare of disk to tape after a backup.
Then I noticed that reading floppys had a similar problem. The only common
denominator I could think of was that both subsystems used the motherboard
DMA controller to transfer data. So I created a little test under DOS.
I made a 500Kb file of random data and put two copies on a 1.2MB floppy.
I then ran the DOS comp (file compare) program endlessly. The files would
miscompare in a few minutes. Eventually the program would crash. My guess was
that this one bye in a million was not just vanishing but instead being
written to a 'random' location.
This could be your problem. If so then a replacement motherboard would
solve it (assuming you have a marginal component somewhere rather than
a bad motherboard design).
If the dealer is willing to swap and maybe give you another week or so to
test, you might get lucky. Then again this is a WILD GUESS!
You might also try writing a test program like mine.
Good luck
Andy
--
Andy Burgess
Independent Consultant
uunet!silma!cichlid!aab
aab at cichlid.com
-----------------------------
From: Greg Montgomery <greg at turbo.atl.ga.us>
Subject: Coherent info
Date: 15 Aug 90 21:59:00 GMT
To: info-unix at sem.brl.mil
I'm looking for some info and opinions on Coherent from any users of
it... I've talked to a tech at MW, and it sounds good, and a 386 version
and DOS emulation is under development, so I've been considering getting
it, but would like some opinions..
Please email any replies.
Thanks...
Greg
----
Greg Montgomery Internet: greg at turbo.atl.ga.us
UUCP (smart): greg at turbo.UUCP
UUCP (route): {rutgers,ogcise,gatech}!emory!turbo!greg
-----------------------------
From: TURNER KENNETH WADE <turnerk at snoopy.colorado.edu>
Subject: Re: Coherent info
Date: 17 Aug 90 00:06:01 GMT
Sender: news at boulder.colorado.edu
To: info-unix at sem.brl.mil
In article <2kTyN1w162w at turbo.atl.ga.us> greg at turbo.atl.ga.us (Greg Montgomery) writes:
>I'm looking for some info and opinions on Coherent from any users of
>it... I've talked to a tech at MW, and it sounds good, and a 386 version
>and DOS emulation is under development, so I've been considering getting
>it, but would like some opinions..
Hope this helps.
Wade Turner
-----------------------------
From: "Jay A. Snyder" <jay at gdx.uucp>
Subject: Sys V or BSD for PDP 11/73 Wanted
Date: 16 Aug 90 02:16:37 GMT
To: info-unix at sem.brl.mil
Does any one out there no where to get a copy of SYSV or BSD, or any
version of unix newer than V7 for a DEC LSI 11/73 based system?
echo wrong group flames >/dev/null
--
==============================================================================
Jay A. Snyder "Let Me Up! I've had enough"
wa3wbu!gdx!jay at uunet.uu.net
uunet!wa3wbu!gdx!jay
-----------------------------
From: Randal Schwartz <merlyn at iwarp.intel.com>
Subject: Re: More questions about how to issue a C-SHELL command within a C program
Date: 16 Aug 90 07:34:52 GMT
Sender: news at iwarp.intel.com
To: info-unix at sem.brl.mil
In article <FPB.90Aug16004855 at ittc.ittc.wec.com>, fpb at ittc (Frank P. Bresz) writes:
| Why not just use the putenv system call with something akin to:
|
| putenv("TERM=adm3a"); /* notify subprocess that it is an adm3a terminal */
Nope. That changes the *current* process (the C program), not the
parent process (the parent shell). You *must* involve the parent
process if you want programs invoked after the C program to see the
change (unless you intend the C program to perform all the future
invocations... yuck).
Just another UNIX hacker,
--
/=Randal L. Schwartz, Stonehenge Consulting Services (503)777-0095 ==========\
| on contract to Intel's iWarp project, Beaverton, Oregon, USA, Sol III |
| merlyn at iwarp.intel.com ...!any-MX-mailer-like-uunet!iwarp.intel.com!merlyn |
\=Cute Quote: "Welcome to Portland, Oregon, home of the California Raisins!"=/
-----------------------------
From: Doug Gwyn <gwyn at smoke.brl.mil>
Subject: Re: More questions about how to issue a C-SHELL command within a C program
Date: 16 Aug 90 14:22:10 GMT
To: info-unix at sem.brl.mil
In article <25285.26c9113d at kuhub.cc.ukans.edu> jian at kuhub.cc.ukans.edu writes:
> system("/bin/csh -c 'setenv TERM adm3a");
(You're missing a quote ')
>But none of them can change the terminal type. I don't know why.
Your problem is that no change made to the environment variables of a
subprocess can affect the environment variables of an ancestor process.
This is why most of us make sure our TERM environment variable is properly
set up by a file that is SOURCED, not executed in a subprocess, when our
shell starts up (e.g. .profile or .login).
-----------------------------
From: Guy Harris <guy at auspex.auspex.com>
Subject: Re: More questions about how to issue a C-SHELL command within a C program
Date: 16 Aug 90 19:22:26 GMT
To: info-unix at sem.brl.mil
>Would someone point me another way to change terminal type within a C program
>or give me some hints what I did wrong. I would appreciate any helps.
As noted, the environment isn't "global", so setting an environment
variable such as TERM in one process won't affect its value in any other
existing processes; it'll only affect its initial value in processes
forked from that process.
If you want to change the value of an environment variable in a process
running some arbitrary C program, check whether your system has the
"putenv" routine (look for PUTENV(3) in the manual - unless you have
some SCO system wherein they "improved" the manuals by changing the
names of the sections, in which case I've no idea what the name would
be). If not, see whether it has the "setenv" routine.
If it has one or the other of those routines, the manual page should
show you how to set an environment variable using the routine.
Why do you need to change the setting of TERM within a program? The
ultimate problem may lie deeper. (Also bear in mind that you should set
TERM *before* you call *any* "curses" or "termcap" routines; otherwise,
"curses" or "termcap" will start out using the old value of TERM, not
the new value.)
-----------------------------
From: Peter da Silva <peter at ficc.ferranti.com>
Subject: Re: More questions about how to issue a C-SHELL command within a C program
Date: 16 Aug 90 19:43:41 GMT
To: info-unix at sem.brl.mil
In article <25285.26c9113d at kuhub.cc.ukans.edu>, jian at kuhub.cc.ukans.edu writes:
> execlp("/bin/csh", "csh", "-c", "setenv TERM adm3a", (char *) 0);
You can't set your environment from a subshell. An environment is owned by
a process and inherited by its children, but never passed back. You need to
do something like print the commands on standard output, the way "tset" does:
47 % tset -s
set noglob;
setenv TERM at/386 console ;
unset noglob;
48 % grep tset .login
tset -s ... >/tmp/tset$$
source /tmp/tset$$
rm /tmp/tset$$
49 %
This way the variables get set in the parent shell and so stick around after
the subshell or your C program (which is also a child of the shell) exits.
If you just want to set variables for programs you call, try "putenv".
--
Peter da Silva. `-_-'
+1 713 274 5180. 'U`
peter at ferranti.com (currently not working)
peter at hackercorp.com
-----------------------------
From: Randal Schwartz <merlyn at iwarp.intel.com>
Subject: Re: What's wrong with this Bourne shell script?
Date: 16 Aug 90 07:37:29 GMT
Sender: news at iwarp.intel.com
To: info-unix at sem.brl.mil
In article <FPB.90Aug16005419 at ittc.ittc.wec.com>, fpb at ittc (Frank P. Bresz) writes:
| That would be fine if I had or wanted pearl. I was under the
| impression that Jon's addcol was an awk script (I think that's where the
| original thread came from anway) in which the -# was the column you wanted
| to add and it would magically add up the numbers in column 1 or 7 or
| whatever column you wanted under argumentalized control instead of having
| separate scripts for each possible set of columns you want to add.
Well, the script in awk is almost as easy:
... | awk '{ $x += $3 }
END { print $x }' |
who needs anything else? (But in Perl you can write it in one line. :-)
Just another Perl hacker, more-or-less,
--
/=Randal L. Schwartz, Stonehenge Consulting Services (503)777-0095 ==========\
| on contract to Intel's iWarp project, Beaverton, Oregon, USA, Sol III |
| merlyn at iwarp.intel.com ...!any-MX-mailer-like-uunet!iwarp.intel.com!merlyn |
\=Cute Quote: "Welcome to Portland, Oregon, home of the California Raisins!"=/
-----------------------------
From: Andy Clews <andy at syma.sussex.ac.uk>
Subject: Re: Cshell question: taking wordlists as a single string
Date: 16 Aug 90 13:00:47 GMT
To: info-unix at sem.brl.mil
In article <3251 at syma.sussex.ac.uk>, I wrote:
>
> Basically, then, can Cshell cope with word-lists as single arguments, or
> must I write a C program to do the job (or try sh or ksh?)
>
The solution was staring me in the face and I didn't see it until Jay Plett
sent me this solution:
% xxx "a b c" d e f
a b c
d
e
f
% cat xxx
#! /bin/csh -f
while ( $#argv )
echo $1
shift
end
So you must use a while loop rather than a foreach loop. So obvious now
I look at it. *sigh*
Thanks to Jay for the enlightenment.
--
Andy Clews, Computing Service, Univ. of Sussex, Brighton BN1 9QN, England
JANET: andy at syma.sussex.ac.uk BITNET: andy%syma.sussex.ac.uk at uk.ac
-----------------------------
From: Brad Appleton <brad at ssd.csd.harris.com>
Subject: Re: Cshell question: taking wordlists as a single string
Date: 16 Aug 90 15:26:41 GMT
Sender: news at travis.csd.harris.com
To: info-unix at sem.brl.mil
In article <3251 at syma.sussex.ac.uk> andy at syma.sussex.ac.uk (Andy Clews) writes:
In article <3251 at syma.sussex.ac.uk> you write:
> The difficulty arises because I want to do (for example)
>
> whatnews "bug reports"
>
>where the intended effect is to search out all lines containing the
>string "bug reports". At the moment it splits this up into "bug" and
>"reports" and does two searches. This is because the script contains a
> foreach i ($*)
>loop for repeated searches. Quoting (single or double) doesn't help.
Dont use "$*" in this case, use $argv and a while loop!
The following should work in the manner you desire:
@ i=1
while ( $i <= $#argv )
cmd "$argv[$i]" ##dont forget those quotes!
.
.
.
@ i++
end
Im sure there are other solutions too (probably better ones) but this
works (on my machone anyway) and should be easy to understand.
Any other solutions out there?
hope this helps!
______________________ "And miles to go before I sleep." ______________________
Brad Appleton brad at travis.ssd.csd.harris.com Harris Computer Systems
...!uunet!hcx1!brad Fort Lauderdale, FL USA
~~~~~~~~~~~~~~~~~~~~ Disclaimer: I said it, not my company! ~~~~~~~~~~~~~~~~~~~
-----------------------------
From: Maarten Litmaath <maart at cs.vu.nl>
Subject: Re: Timeout on shell command.
Date: 16 Aug 90 14:13:25 GMT
Sender: news at cs.vu.nl
Followup-To: comp.unix.questions,alt.sources.d
To: info-unix at sem.brl.mil
In article <3716 at sactoh0.UUCP>,
jak at sactoh0.UUCP (Jay A. Konigsberg) writes:
)...
)command & # execute in background
What if the command is supposed to run in the _foreground_?
The following timeout shell script can be easily converted to a C program
if desired.
--------------------cut here--------------------
#!/bin/sh
# @(#)timeout 6.2 90/03/01 Maarten Litmaath
prog=`basename $0`
usage="Usage: $prog [-signal] [timeout] [:interval] [+delay] [--] <command>"
SIG=-KILL # default signal sent to the process when the timer expires,
# unless a delay option has been given: then it is -TERM
sigopt=0
timeout=60 # default timeout
interval=15 # default interval between checks if the process is still alive
delay= # (if specified) the delay between posting the given signal and
# destroying the process (kill -KILL)
while :
do
case $1 in
--)
shift
break
;;
-*)
SIG=$1
sigopt=1
;;
[0-9]*)
timeout=$1
;;
:*)
EXPR='..\(.*\)'
interval=`expr x"$1" : "$EXPR"`
;;
+*)
EXPR='..\(.*\)'
delay=`expr x"$1" : "$EXPR"`
case $sigopt in
0)
SIG=-TERM
esac
;;
*)
break
esac
shift
done
case $# in
0)
echo "$usage" >&2
exit 2
esac
(
for t in $timeout $delay
do
while test $t -gt $interval
do
sleep $interval
kill -0 $$ || exit
t=`expr $t - $interval`
done
sleep $t
kill $SIG $$ && kill -0 $$ || exit
SIG=-KILL
done
) 2> /dev/null &
exec "$@"
--
"UNIX was never designed to keep people from doing stupid things, because
that policy would also keep them from doing clever things." (Doug Gwyn)
-----------------------------
From: Klaus Harbo <harbo at diku.dk>
Subject: Printing with terminalservers
Keywords: print terminalserver
Date: 16 Aug 90 14:30:07 GMT
To: info-unix at sem.brl.mil
I want to be able to hook up printers on terminalservers, so that
we can place our printers anywhere in the house.
We use Ultrix on DECStations version 3.1. Our terminalservers are
Bridge CS200. As far as I understand you can assign one of the physical
ports on the terminalserver to have a separate IP address.
What's needed then, is some kind of software that will send open a (TCP?)
connection to that IP address, and send the print job to that port. Does
anyone know of such software, and will the solution I suggest do the job?
I do not know a lot about terminalservers, but I suppose it contains
the software needed to handle TCP connections, directing the output
to the physical port on the terminalserver assigned to the printer.
Thanks in advance.
-Klaus
|--------------------------------------------------------------------------|
| Klaus Harbo | |
| Euromath Center | e-mail: harbo at euromath.dk |
| Universitetsparken 5 | phone: +45 3135 3133 ext. 417 |
| DK-2100 Copenhagen | fax: +45 3135 0427 |
|--------------------------------------------------------------------------|
--
|--------------------------------------------------------------------------|
| Klaus Harbo | |
| Euromath Center | e-mail: harbo at euromath.dk |
-----------------------------
From: Doug Gwyn <gwyn at smoke.brl.mil>
Subject: Re: getting the exit value of an exec'd program
Date: 16 Aug 90 14:40:38 GMT
To: info-unix at sem.brl.mil
In article <1990Aug15.223952.1175 at NCoast.ORG> atul at NCoast.ORG (Atul Parulekar) writes:
>May be the answer is in the manual, but I have not been able to find it.
>My problem is that if I run a program using fork and execvp, how do I get
>the exit value of the exec'd program into the main program.
Via wait().
The general procedure for running a subprocess is, in outline:
switch ( (pid = fork()) )
{
case -1:
Punt( "unable to fork" );
/*NOTREACHED*/
case 0: /* child */
args[0] = "command";
execvp( args[0], args ); /* WARNING: uses $PATH */
_exit( 127 );
/*NOTREACHED*/
default: /* parent */
while ( (w = wait( &status )) != pid )
if ( w == -1 && errno != EINTR )
break;
if ( w == -1 )
{
Punt( "child disappeared" );
/*NOTREACHED*/
}
else if ( (status & 0xFF) != 0 )
{
/* (status & 0x7F) is the signal number */
/* (status & 0x80) != 0 iff core dumped */
Punt( "child terminated abnormally" );
/*NOTREACHED*/
}
else
status = status >> 8 & 0xFF; /* exit status */
}
-----------------------------
From: 35G-PATEL <vsp at hjuxa>
Subject: Help on tools like SCCS, SPRs etc..
Date: 16 Aug 90 14:48:33 GMT
To: info-unix at sem.brl.mil
We are in planning phase for a year long system software dvl
project. We are working on a UNIX system. We are planning
to use SCCS for source control.
1) Is there any other software that is like/better
than SCCS? (preferably from public domain)
2) Software to manage MRs (modification requests) and
QARs (Quality Assurance Report) to track bug fixes
during development/field test?
3) Package that can combine both of these features to
keep software in sync with any updates from QARs etc.
4) Are there any other groups for these questions?
You may mail me directly. I will post the results
sometime in the future. Thankx.
vsp at unx.dec.com
--
=============================================================================
___ ___ ___ ___ ___ ___ ___ Vipul Patel
-----------------------------
From: Bob Fyfe <fyfe at bgsuvax.uucp>
Subject: extracting files from a tar file
Keywords: tar
Date: 16 Aug 90 15:05:39 GMT
To: info-unix at sem.brl.mil
I have a faculty member who has brought a tape with him from a different site.
It is a tar tape and the files were stored using absolute pathnames. The
difficulty is that we don't have the same file structure names and so when
I would try to restore the files, it fills up the root file structure
quickly (we don't keep a whole lot of space available in that partition).
I was wondering if there are any PD programs that exist or whether someone
has written a script to get around this problem. I could write a script
to extract a file at a time and then move it but its a hassle trying to
maintain the directory structure that the faculty member has and preserve
modification dates. I've also considered writing a C program using the
chroot function and doing a system call to tar but that seems messy too.
Is there anything out there available or am I missing something in my own
backyard?
Any help would be appreciated. You can direct email any solutions to me.
Bob Fyfe
***************************************************************************
* Bob Fyfe / EMT-A/ Ham Radio KA8YWQ | INTERNET: fyfe at andy.bgsu.edu *
* University Computer Services | BITNET: fyfe at bgsuopie *
* Bowling Green State University (OH)| UUCP: ...!osu-cis!bgsuvax!fyfe *
***************************************************************************
--
***************************************************************************
* Bob Fyfe / EMT-A/ Ham Radio KA8YWQ | INTERNET: fyfe at andy.bgsu.edu *
* University Computer Services | BITNET: fyfe at bgsuopie *
* Bowling Green State University (OH)| UUCP: ...!osu-cis!bgsuvax!fyfe *
***************************************************************************
-----------------------------
From: Andy Clews <andy at syma.sussex.ac.uk>
Subject: Re: Cshell question. Or: How to make a fool of yourself
Date: 16 Aug 90 15:43:14 GMT
To: info-unix at sem.brl.mil
In article <3269 at syma.sussex.ac.uk>, I stupidly wrote:
> So you must use a while loop rather than a foreach loop. So obvious now
> I look at it. *sigh*
I am making a rather embarrassing fool of myself. Marten Litmaath very
correctly pointed out that
foreach i ($*:q)
etc.
will work just as well. *And* it's all in TFM. I apologise for wasting
net bandwidth.
I will now shut up. *SIGH* It's been one of them days....
--
Andy Clews, Computing Service, Univ. of Sussex, Brighton BN1 9QN, England
JANET: andy at syma.sussex.ac.uk BITNET: andy%syma.sussex.ac.uk at uk.ac
-----------------------------
From: Dan Mercer <mercer at npdiss1.stpaul.ncr.com>
Subject: Sending mail with explicit INTERNET address
Date: 16 Aug 90 16:10:15 GMT
To: info-unix at sem.brl.mil
I have accounts on two different systems tcp/ip'd together across
an Ethernet backbone. Neither node is on the backbone, but the
networks they are on are gated to the backbone. On my home system,
where I have sysadmin privileges, the remote system is in my
/etc/hosts file. On the remote system, where I'm a guest, my
home system has not been put in their /etc/hosts file despite
numerous requests. I can ftp and telnet from the remote to my
home system by using explicit decimal dot addressing. My problem is,
how do I mail stuff to myself by the same method?
TIA
--
Dan Mercer
Reply-To: mercer at npdiss1.StPaul.NCR.COM (Dan Mercer)
"MAN - the only one word oxymoron in the English Language"
-----------------------------
From: Isaac Rabinovitch <ergo at netcom.uucp>
Subject: Re: Spy Programs??
Date: 16 Aug 90 16:57:53 GMT
To: info-unix at sem.brl.mil
In <3715 at sactoh0.UUCP> jak at sactoh0.UUCP (Jay A. Konigsberg) writes:
>In article <24123 at adm.BRL.MIL> senetza at hg.uleth.ca (Leonard Senetza) writes:
>>I have a few 'hostile' users on my system here. I was wondering if anyone has
>>a 'spy' type of program that would allow me to watch/record/control other
>>users' sessions. I could possibly write one myself, but why re-invent the
>>wheel?
>>
>There are a few ways to do this. However, assuming you _are_ the
>administrator of the system, there is one reasonably easy way.
>Take the cables running to these hostile users terminals and splice into
>them. Assuming everyone (including yourself) is using the same type of
>terminal, you can then run the T from the splice to your terminal. To
>be on the safe side, you probably don't want to connect the "write" pin
>(2 or 3, I can never remember).
A similar, and possibly more useful, approach would be to run the
cable through a PC running one of those RS-232 diagnostic programs
that captures data. Of course, you'd need a PC with two serial
ports. Permanent records are always useful when legality time comes
'round. And if the bad guy isn't using your usual type of terminal,
you can just save everything until you can figure out how his escape
codes work.
--
ergo at netcom.uucp Isaac Rabinovitch
atina!pyramid!apple!netcom!ergo Silicon Valley, CA
uunet!mimsy!ames!claris!netcom!ergo
Disclaimer: I am what I am, and that's all what I am!
-----------------------------
From: Stig Jacobsen <shj at login.dkuug.dk>
Subject: Looking for a BCD library for Unix / C
Keywords: BCD,library
Date: 16 Aug 90 17:06:40 GMT
Sender: news at slyrf.dkuug.dk
Followup-To: comp.lang.c
To: info-unix at sem.brl.mil
Does anyone know of a BCD library for Unix? It doesn't matter whether
it is commercial, free, whatever (I haven't seen any at all!). Please
mail me any info that you have - thanks in advance.
--
Stig Jacobsen
shj at login.dkuug.dk
fidonet 2:231/16.0
-----------------------------
From: John H Merritt <merritt at iris613.gsfc.nasa.gov>
Subject: /-happy
Date: 16 Aug 90 17:20:49 GMT
Sender: news at dftsrv.gsfc.nasa.gov
To: info-unix at sem.brl.mil
Explain why '/////' is valid in the following statement:
cd /./../tmp/////../././bin
It is interesting that any permutation of '.', '..', '/' and directory
names can be used with, at least, csh, sh, and tcsh to yield a valid
path name.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
John H. Merritt # Yesterday I knew nothing,
Applied Research Corporation # Today I know that.
merritt at iris613.gsfc.nasa.gov #
-----------------------------
From: Randal Schwartz <merlyn at iwarp.intel.com>
Subject: Re: /-happy
Date: 16 Aug 90 21:50:45 GMT
Sender: news at iwarp.intel.com
To: info-unix at sem.brl.mil
In article <3139 at dftsrv.gsfc.nasa.gov>, merritt at iris613 (John H Merritt) writes:
| Explain why '/////' is valid in the following statement:
|
| cd /./../tmp/////../././bin
|
| It is interesting that any permutation of '.', '..', '/' and directory
| names can be used with, at least, csh, sh, and tcsh to yield a valid
| path name.
The null pathname (look carefully between the consecutive "/"-s, and
you'll see them there) is a valid synonym for the "current directory".
So aaa////bbb is the same as aaa/././././bbb, except that you don't
have to stat "." four additional times (it'd be fast, but it still
takes time).
Just another Unix hacker,
--
/=Randal L. Schwartz, Stonehenge Consulting Services (503)777-0095 ==========\
| on contract to Intel's iWarp project, Beaverton, Oregon, USA, Sol III |
| merlyn at iwarp.intel.com ...!any-MX-mailer-like-uunet!iwarp.intel.com!merlyn |
\=Cute Quote: "Welcome to Portland, Oregon, home of the California Raisins!"=/
-----------------------------
From: "William (Bill" <mayne at vsserv.scri.fsu.edu>
MMDF-Warning: Parse error in original version of preceding line at BRL.MIL
Subject: Re: redirecting standard i/o from an exec'ed programme
Keywords: popen, io, exec, system
Date: 16 Aug 90 17:38:04 GMT
Sender: news at sun13.scri.fsu.edu
To: info-unix at sem.brl.mil
In article <377 at fe2o3.UUCP> michael at fe2o3.UUCP (Michael Katzmann) writes:
>
>I have a task that requires the ability to fork off another programme but
>to supply it's standard input and output. The SysV manuals describe
>
> FILE *popen( command, type )
> char *command, *type;
>
>which execs the command a la "system()" and creates a pipe. "type" and be
>"r" if you want to read from the standard output of "command", or "w" if
>you want to write to standard input. However there doesn't seem to be any
>way to use this routine to do both similtaneously.
>
>What is the usual way to to this?
>
>Important points: The exec'ed command must run asynchronously (obvious if
> the parent is supplying input.)
>
> The child process id must be available to the parent.
> (so that it can be killed if necessary)
>
>
>Any ideas would be appreciated.
>
>
>---------------------------------------------------------------------
>email to
>UUCP: uunet!mimsy!{arinc,fe2o3}!vk2bea!michael
> _ _ _ _
> Amateur | VK2BEA (Australia) ' ) ) ) / //
> Radio | G4NYV (United Kingdom) / / / o _. /_ __. _ //
> Stations| NV3Z (United States) / ' (_<_(__/ /_(_/|_</_</_
>
>Michael Katzmann
>Broadcast Sports Technology.
>2135 Espey Ct. #4
>Crofton Md. 21114 USA
>
>Ph: +1 301 721 5151
Although, as a response on the net indicates, there can be problems
connecting both stdin and stdout from a child if you aren't
very careful about protocols there are cases where it is useful.
As you have discovered popen() won't do it, though. I have
waited to see if a detailed answer was provided by others.
Since I haven't seen one I will post part of a program I wrote
which does this. The key is that the child inherits stdin and
stdout from the parent, so the parent changes his own stdin
and stdout to pipes before spawning the child, using dup() to
change file desciptors.
The purpose of this program is to run all permutations of given
string through the program used by the standard spell script
looking for all the words which can be formed from the letters
in the input, as when solving word puzzles such as "Jumbles"
found in many newspapers. I have omitted the details and tried
to leave everything necessary to (1) see how to do the i/o
redirection you wanted to do and (2) see the whole structure
of the process tree in which this was used in a realistic
(or at least fun) application. The permutation generator
created the list of permutations in sorted order since this
was much faster than creating the whole list and then sorting,
even if space permitted. It also actually generated two
separate streams of permutations since that was actually more
efficient than splitting one up and avoided possible deadlock
problems. I hope the editting jobs leaves enough for you to
see what is going on without getting lost in details.
Incidentally I tried to email the whole thing but got
"host not known". Can experienced netters suggest how I might
be able to use the routing show at the top of a post to
reply even when my local host doesn't know the final
destination?
/* anagram.c - extracted fragments to show redirection */
#include <string.h>
#include <stdio.h>
#ifndef SPELLPROG
#define SPELLPROG "/usr/bin/spellout"
#endif
#ifndef DICT
#define DICT "/usr/dict/hlista"
#endif
/* Omitting some irrelevant stuff here */
main(argc,argv,envp) int argc; char **argv, **envp;
{
int pipe1[1], pipe2[2];
char word[21];
int i;
#define TOCHILD pipe1[1]
#define FROMCHILD pipe2[0]
#define TOPARENT pipe2[1]
#define FROMPARENT pipe1[0]
/* Stuff omitted */
pipe(pipe1);
pipe(pipe2);
if (fork()==0)
{
if (fork()==0)
{
/* Child to invoke spell program in a pipeline */
/* Close unused pipes */
close (TOCHILD);
close (FROMCHILD);
/* Change stdin and stdout to pipe */
close(0);
dup(FROMPARENT);
close(1);
dup(TOPARENT);
/* Invoke spell command */
execl(SPELLPROG,"spellout",DICT,(char *)0);
/* No return to here. For completeness make parent terminate */
}
else
{
/* Process to send distinct permutations to spelling checker */
/* Close unused pipes */
close(FROMCHILD);
close(TOPARENT);
close(FROMPARENT);
/* Switch stdout to TOCHILD pipe */
close(1);
dup(TOCHILD);
/* Send all distinct permutations to spell child */
/* by writing them to stdout - details omitted */
}
}
else
{
/* Root process invokes permute() to display accepted permutations */
/* Close unused pipes */
close(TOCHILD);
close(TOPARENT);
close(FROMPARENT);
/* Change stdin to pipe from speller */
close(0);
dup(FROMCHILD);
/* Generate permutations in sorted order;
Read misspellings from pipe;
Print everything not on misspell list;
- details omitted */
}
}
-----------------------------
From: Maarten Litmaath <maart at cs.vu.nl>
Subject: Re: redirecting standard i/o from an exec'ed programme
Date: 16 Aug 90 18:53:10 GMT
Sender: news at cs.vu.nl
To: info-unix at sem.brl.mil
In article <410 at sun13.scri.fsu.edu>,
mayne at VSSERV.SCRI.FSU.EDU (William (Bill) Mayne) writes:
)...
) /* Close unused pipes */
) close (TOCHILD);
) close (FROMCHILD);
) /* Change stdin and stdout to pipe */
) close(0);
) dup(FROMPARENT);
close(FROMPARENT); /* !!! */
) close(1);
) dup(TOPARENT);
close(TOPARENT); /* !!! */
I've deleted the rest of the code, but there were still a few other places
where calls to close() should be added.
Always close every unused file descriptor (esp. when dealing with pipes),
else you will get bitten one day; example scenario:
- the child exits
- the parent reads from the pipe to the child
- the parent still has the write side of the pipe open
- the read hangs...
--
"UNIX was never designed to keep people from doing stupid things, because
that policy would also keep them from doing clever things." (Doug Gwyn)
-----------------------------
From: Russ Romero <rrome at atr-14.hac.com>
Subject: Unix supporting HANGUL (Korean) avail?
Date: 16 Aug 90 17:58:21 GMT
Sender: news at hacgate.uucp
To: info-unix at sem.brl.mil
Looking for a version of UNIX from a COTS vendor which supports
the Korean character set HANGUL. As I understand it (rather,
think I understand it), this is a 27 letter set of phonetic
characters, using a two byte code.
Anyway, if you know about it, you know better what it is than I.
Please e-mail (doubt there's widespread interest in this).
Any clues accepted. THANKS
rrome at 1lkernel.hac.com ======================================================
Russ Romero
============================================ (brilliant opinions proprietary)
-----------------------------
From: Peter Murray <pemurray at miavx1.acs.muohio.edu>
Subject: Re: help sought - securing a terminal/line
Date: 16 Aug 90 18:03:55 GMT
To: info-unix at sem.brl.mil
In article <1990Aug14.161816.3450 at chinet.chi.il.us>, les at chinet.chi.il.us (Leslie Mikesell) writes:
> Does anything support the now-ubiquituous devices that announce the connection
> speed in ASCII before bringing up CD or does everyone still have to
> write their own code for this if they don't want the users to have to
> send something before getting the login prompt?
I found the source code for AGETTY, an alternative getty for SYSV, at
gatekeeper.dec.com (annonymous FTP) when I was working with this problem
before. This program should do the trick for you, and it is (relatively)
easy to port it to BSD, if you need to.
Peter
--
Peter Murray Neat UNIX Stunts #7: pemurray at miavx1.bitnet
215 Foxfire Dr #308 csh> %blow murrayp at apsvax.aps.muohio.edu
Oxford, OH 45056 NeXT Mail: pmurray at next4.acs.muohio.edu
-----------------------------
From: "Joe.Fernandez" <joe at robin.sandiego.ncr.com>
Subject: Re: help sought - securing a terminal/line
Date: 16 Aug 90 20:11:31 GMT
Sender: news at iss-rb.sandiego.ncr.com
To: info-unix at sem.brl.mil
In article <=D25VBE at xds13.ferranti.com> peter at ficc.ferranti.com (Peter da Silva) writes:
>In article <3846 at auspex.auspex.com>, guy at auspex.auspex.com (Guy Harris) writes:
>> For UNIX-like systems with "ttymon", such as System V Release 4, I think
>> there's some other magic you can do to arrange that "ttymon" run your
>> program when the port starts up.
>
>You're saying V.4 doesn't use inittab?
>
>Um, this is not good. The flexibility of inittab has been very helpful. I
>don't want to go back to kludging a login or getty front-end again.
inittab still exists in SVR4. ttymon is a STREAMS-based port monitor
that detects connection requests on the tty ports. It replaces the
getty processes. SVR4 now has one process doing the work that lots of
getty processes had to do in in pre-SVR4. A connection request
is when one non-break char followed by a new line char is received on
the port. When ttymon detects the connection request it executes the
service process that has been configured for that port. One example of
a service process is our old friend the login process. But you can create
your own specific service process. This is unlike pre-SVR4 where the only
service process that can be invoked from getty is 'login'.
inittab starts the ttymon and any other port monitors (e.g., listen) that
may exist on the system. Users can develop their own port monitors.
--Hope this helps
============================================================================
Joe Fernandez NCR Corporation, MS# 9140
(619) 485-2186 16550 W. Bernardo Dr.
uunet!ncrlnk!ncr-sd!iss-rb!robin!joe San Diego, CA 92127
-----------------------------
From: Martin Brooks <mb33 at prism.gatech.edu>
Subject: LaserWriter II printcap entry needed
Keywords: Sun4 Apple
Date: 16 Aug 90 18:30:42 GMT
To: info-unix at sem.brl.mil
Does anyone have an /etc/printcap entry that would work with an Apple
LaserWriter II connected to a Sun4/280 via serial port? If so, please
send mail. Thanks in advance.
--
Martin Brooks - Georgia Tech - Atlanta, Georgia, USA
uucp: ...!gatech!prism!mb33 Internet: mb33 at prism.gatech.edu
-----------------------------
From: Jamie Gobble <jkg at juliet.cs.duke.edu>
Subject: Looking for an adduser script.
Date: 16 Aug 90 19:12:17 GMT
Sender: news at duke.cs.duke.edu
To: info-unix at sem.brl.mil
Hi,
Do any of you have an adduser script written perl or awk? If so,
or if you know of another good approach, please drop me a line.
Thanks,
Jamie.
p.s. Of course, I'll summarize and post if enough of you me to want.
---
Jamie Gobble, sounds like "go-bull" Computational Neuroscience Lab
Dept. of Neurobiology
O_o -Ack! inet: jamie at neuro.duke.edu Duke Univ. Med. Ctr., Box 3209
=( )= bnet: GOBBL001 at DUKEMC Durham, N.Carolina 27710, USA
U Work (919) 684-5748
-----------------------------
From: Ramon F Herrera <ramon at skye.mit.edu>
Subject: Changing back slashes to forward slashes
Keywords: tr, sed, PC, port
Date: 16 Aug 90 19:46:44 GMT
Sender: Mr Background <daemon at athena.mit.edu>
To: info-unix at sem.brl.mil
I have a question for those {sed, grep, awk, tr} wizards out there.
I'd like to change all the occurrences in a file of a line like this:
#include "dira\dirb\incl.h"
to
#include "dira/dirb/incl.h"
but only for the lines that begin with "#include".
As you may have guessed, I am porting a PC-DOS program to Unix.
thanks,
Ramon
--
Ramon F. Herrera
Research Laboratory of Electronics
Massachusetts Institute of Technology
ramon at iona.mit.edu
-----------------------------
From: Lee F Kolakowski <lfk at athena.mit.edu>
Subject: Re: Changing back slashes to forward slashes
Date: 16 Aug 90 20:33:32 GMT
Sender: Mr Background <daemon at athena.mit.edu>
To: info-unix at sem.brl.mil
On Thu, 16 Aug 90 19:46:44 GMT,
ramon at skye.mit.edu (Ramon F Herrera) said:
> I have a question for those {sed, grep, awk, tr} wizards out there.
> I'd like to change all the occurrences in a file of a line like this:
> #include "dira\dirb\incl.h"
> to
> #include "dira/dirb/incl.h"
> but only for the lines that begin with "#include".
Try:
awk '
{
if ($0 ~ /^#include/)
gsub(/\\/, "/")
print
}' filename
Frank Kolakowski
======================================================================
|lfk at athena.mit.edu || Lee F. Kolakowski |
|lfk at eastman2.mit.edu || M.I.T. |
|kolakowski at wccf.mit.edu || Dept of Chemistry |
|lfk at mbio.med.upenn.edu || Room 18-506 |
|lfk at hx.lcs.mit.edu || 77 Massachusetts Ave.|
|AT&T: 1-617-253-1866 || Cambridge, MA 02139 |
|--------------------------------------------------------------------|
| #include <woes.h> |
| One-Liner Here! |
======================================================================
--
Frank Kolakowski
======================================================================
|lfk at athena.mit.edu || Lee F. Kolakowski |
|lfk at eastman2.mit.edu || M.I.T. |
|kolakowski at wccf.mit.edu || Dept of Chemistry |
|lfk at mbio.med.upenn.edu || Room 18-506 |
|lfk at hx.lcs.mit.edu || 77 Massachusetts Ave.|
|AT&T: 1-617-253-1866 || Cambridge, MA 02139 |
|--------------------------------------------------------------------|
| #include <woes.h> |
| One-Liner Here! |
======================================================================
-----------------------------
From: Rouben Rostamian <rouben at math13.math.umbc.edu>
Subject: Re: Changing back slashes to forward slashes
Keywords: tr, sed, PC, port
Date: 16 Aug 90 20:57:51 GMT
Sender: newspost at umbc3.umbc.edu
To: info-unix at sem.brl.mil
In article <1990Aug16.194644.14376 at athena.mit.edu> ramon at skye.mit.edu (Ramon F Herrera) writes:
|
|I have a question for those {sed, grep, awk, tr} wizards out there.
|I'd like to change all the occurrences in a file of a line like this:
|
|#include "dira\dirb\incl.h"
|
|to
|
|#include "dira/dirb/incl.h"
|
|but only for the lines that begin with "#include".
|
sed <infile -e '/\#include/s/\\/\//g' >outfile
--
Rouben Rostamian Telephone: (301) 455-2458
Department of Mathematics and Statistics e-mail:
University of Maryland Baltimore County rostamian at umbc.bitnet
Baltimore, MD 21228, U.S.A. rostamian at umbc3.umbc.edu
-----------------------------
From: Randal Schwartz <merlyn at iwarp.intel.com>
Subject: Re: Changing back slashes to forward slashes
Keywords: tr, sed, PC, port
Date: 16 Aug 90 21:53:18 GMT
Sender: news at iwarp.intel.com
To: info-unix at sem.brl.mil
In article <1990Aug16.194644.14376 at athena.mit.edu>, ramon at skye (Ramon F Herrera) writes:
|
| I have a question for those {sed, grep, awk, tr} wizards out there.
| I'd like to change all the occurrences in a file of a line like this:
|
| #include "dira\dirb\incl.h"
|
| to
|
| #include "dira/dirb/incl.h"
|
| but only for the lines that begin with "#include".
perl -pi~ -e 's#\\#/#g if /^#include/' file1.c file2.c file3.c ...
Pretty darn simple with Perl. Even leaves you a backup.
Just another Perl hacker,
--
/=Randal L. Schwartz, Stonehenge Consulting Services (503)777-0095 ==========\
| on contract to Intel's iWarp project, Beaverton, Oregon, USA, Sol III |
| merlyn at iwarp.intel.com ...!any-MX-mailer-like-uunet!iwarp.intel.com!merlyn |
\=Cute Quote: "Welcome to Portland, Oregon, home of the California Raisins!"=/
-----------------------------
From: "Frank P. Bresz" <fpb at ittc.wec.com>
Subject: addcol - # [Was: Re: What's wrong with this Bourne shell script?]
Date: 16 Aug 90 20:19:19 GMT
Sender: news at ittc.wec.com
To: info-unix at sem.brl.mil
In article <416 at necssd.NEC.COM> harrison at necssd.NEC.COM (Mark Harrison) writes:
>Here is a simple one in awk. Replace $4 with your column number.
> awk '{ tot += $4} END{print tot}'
> ^^
>If you put this into a shell script called addcol, you can say
> awk '{ tot += $'$1'} END{print tot}'
>and invoke it by
> addcol 4
>Example: How many bytes in my files?
> ls -l c* | awk '{ tot += $4} END{print tot}'
> ls -l c* | addcol 4
>Hope this helps!
It is EXACTLY what I was looking for. Thank you very much for
weeding through and figuring out what I really wanted.!!
--
+--------------------+
|fbresz at ittc.wec.com | My opinions are my own, I'm not paid
|uunet!ittc!fbresz | enough to make an official statement
|(412)733-6749 | +-----------------------------------+
|Fax: (412)733-6444 | | THIS SPACE FOR SALE!!! |
+--------------------+ +-----------------------------------+
-----------------------------
From: Randal Schwartz <merlyn at iwarp.intel.com>
Subject: Re: Converting to uppercase/lowercase in sed
Date: 16 Aug 90 23:21:51 GMT
Sender: news at iwarp.intel.com
To: info-unix at sem.brl.mil
In article <3766 at umbc3.UMBC.EDU>, rostamia at umbc5 writes:
| Is there a way to convert characters to uppercase or to lowercase in sed?
| In EX the command
| s/asdf/\U&/
| changes the string asdf to ASDF, but ed and sed do not seem to be as
| sophisticated as ex :-(
|
| Any ideas?
yeah, the not very well documented "y" command.
y/a-z/A-Z/
uppercases the pattern space. You'll have to juggle the pattern and
hold spaces if you want just part of a line uppercased.
Or get Perl. :-)
--
/=Randal L. Schwartz, Stonehenge Consulting Services (503)777-0095 ==========\
| on contract to Intel's iWarp project, Beaverton, Oregon, USA, Sol III |
| merlyn at iwarp.intel.com ...!any-MX-mailer-like-uunet!iwarp.intel.com!merlyn |
\=Cute Quote: "Welcome to Portland, Oregon, home of the California Raisins!"=/
-----------------------------
From: Melinda Shore <shore at mtxinu.com>
Subject: Re: MACH stripped from AT&T code ?
Date: 17 Aug 90 01:06:57 GMT
To: info-unix at sem.brl.mil
In article <3229 at uniol.UUCP> moeller at uniol.UUCP (Klaus Moeller) writes:
>It was said somewhere( I don't know where) that the MACH Kernel
>contains no AT&T code anymore.
This is a *very* common misconception. The current Mach kernel
contains significant amounts of BSD code and requires an AT&T
license. The 3.0 Mach kernel will be free of AT&T code, but how
useful it will be to the average user without an environment,
filesystem, device drivers, etc. (all would require licenses) is
left as an exercise for the reader.
--
Melinda Shore shore at mtxinu.com
mt Xinu ..!uunet!mtxinu.com!shore
-----------------------------
From: phd_ivo at gsbvxb.uchicago.edu
Subject: sort with a tab as separator
Date: 17 Aug 90 01:21:42 GMT
Sender: News Administrator <news at midway.uchicago.edu>
To: info-unix at sem.brl.mil
How do I indicate to sort that my field-separation character is the tab (^I)?
I know that there is a tab option (-t) in sort, but I don't know how to specify
^I ( or \t, for that matter).. No, the default is not this tab, but any
whitespace character according to my documentation.
Thanks for any help.
/ivo welch ivo at next.agsm.ucla.edu
-----------------------------
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