NetNews Usenet Archive 1992 #20/NN_1992_20.iso/spool/comp/unix/question/10804

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INFO-UNIX Digest          Fri, 04 Sep 1992              V15#140

Today's Topics:
                       Re: Using KKermit with cu
                    missing /etc/resolv.conf - help
                   Re: IP address from remote telnet
         Re: SUMMARY:  What Unix HW/SW I will buy with my $8000
                  Re: How to prevent a large core-dump
                       Need help from a make guru
                      Fixing Corrupted Tar files?
                    Re: Shell Scripts vs. C programs
               need script to rename uppercase filenames
                             Dear vi guru,
                           Re: Dear vi guru,
                       spawning dbx on ones' self
-----------------------------------------------------------------

From: "Patrick D. Buick" <buick@belay>
Subject: Re: Using KKermit with cu
Date: 31 Aug 92 18:02:11 GMT
To:       [e-mail]

In article <[e-mail]> [e-mail] (Alexander Szewczak) writes:
>[e-mail] (Leslie Mikesell) writes:
>: I'm sort of internet-impaired myself
>
>Watch it, buddy. That's "differently networked".
>
>--
>| Dave Schweisguth   Yale MB&B & Chemistry   Email: [e-mail] |
>| Lab phone: [phone]      Fax: [phone]     Home phone: [phone] |

Nah, that's Internetually Challenged!! :-)
--
==========================================================
Patrick D. Buick EMT, EET  | Internet: [e-mail]
Belay Enterprises Inc.     | Internet: [e-mail]
Calgary, Alberta, Canada   | UUCP:...!calgary!pixel!belay!buick

-----------------------------

From: Sabina Wolfson <[e-mail]>
Subject: missing /etc/resolv.conf - help
Date: 2 Sep 92 02:22:55 GMT
Sender: netnews admin account <[e-mail]>
X-Disclaimer: Nyx is a public access Unix system run by the University
    of Denver for the Denver community.  The University has neither
    control over nor responsibility for the opinions of users.
To:       [e-mail]

Hello,

The machine I have an account on at school is *missing* the resolv.conf
file so that if I want to telnet/ftp somewhere I have to know the IP
address of the site, not just the name.  Is there something like
gethostbyname() that will let me specify the name server to use (as is
it just defaults to the local host which is not acceptable)?  Or is
there a way to get nslookup to use another namer server (as is I have to
wait a minute or two for it to default to the /etc/hosts file and then
specify another namer server -- this is a pain)?  Or is there some way
I can send a request to another name server (I know which namer server
my site should be using)?

Any help, hints, ideas would be appreciated!  Please post responses or
mail them to [e-mail].

Thanks!  Sabina :)

p.s. yes, I already talked to the sys admin about this a few times...

-----------------------------

From: David Lemson <[e-mail]>
Subject: Re: IP address from remote telnet
Date: 2 Sep 92 03:33:18 GMT
To:       [e-mail]

[e-mail] (David Dymm) writes:


>I would like to figure out how to determine an individual's IP address
>when they are telneting into my system from a remote machine.
>The scenario is that a user is on machine A (anywhere in the world),
>and telnets into my system, and then runs a program on my system that
>I provide to them.  The program that is running on my system must be
>able to determine the IP address of machine A.

Get the log_tcp (tcp wrapper) package.  I believe it's on
ftp.win.tue.nl and cert.sei.cmu.edu in the tools directory.
--
David Lemson                                                 [phone]
University of Illinois NeXT Campus Consultant  / CCSO NeXT Lab System Admin
Internet : [e-mail]                 UUCP :...!uiucuxc!uiucux1!lemson
NeXTMail accepted                                   BITNET : LEMSON@UIUCVMD

-----------------------------

From: Greg Lehey <[e-mail]>
Subject: Re: SUMMARY:  What Unix HW/SW I will buy with my $8000
Date: 2 Sep 92 10:02:06 GMT
Followup-To: comp.unix.questions
To:       [e-mail]

In article <[e-mail]> [e-mail] (Roger Gonzalez) writes:
>
>I wanted to buy a Unix box for home, and posted asking what I should buy for
>$8000.
>
>Looks like I will probably buy a
>- 50MHz 486DX2 EISA w/ SCSI, 8Mb, 340Mb, svga    ($3695)
                              ^^^ bad idea
>- replace their monitor with NEC 5fg             ($1000)
>- 1.2Gb disk                                     ($1200)
>- 2.3Gb tape                                     ($1200)
   ^^^^^^^^^^ can this read QIC-150 cassettes?
>- Dell Unix                                      ($1000)

8 MB should be considered an absolute minimum. You wouldn't get
anything like good performance out of the machine with that little
memory. Upgrading to 16 MB usually means throwing out the 8 MB of 1 MB
SIMMs and replacing them with 4 x 4 MB SIMMs.

Most software distributed on tape will come on QIC-24 or QIC-150. If
your nice 2.3 GB machine can't read them, it's only performing half
its duty.
--
Greg Lehey                       | Tel: [phone]
LEMIS                            | Fax: [phone]
Schellnhausen 2, W-6324 Feldatal, Germany
*** NOTE ***: Headers get mangled at backbone - reply to [e-mail]

-----------------------------

From: Lytras Apostolos <[e-mail]>
Subject: Re: How to prevent a large core-dump
Date: 2 Sep 92 15:37:13 GMT
Sender: USENET News Admin <[e-mail]>
Nntp-Posting-Host: avalon
To:       [e-mail]

At least on the SUN we have here it works to put

limit coredumpsize 0

in your .cshrc file, and that prevents cores from dumping...

- Apostolos.

PS: of course, you can set the limit to a different value, if you
like... ;-)

--
     [e-mail]           |   Apostolos Lytras
     [e-mail]    |   Informatik Club der Uni
     [e-mail]      |   Zuerich, SysAdmin

-----------------------------

From: Stephen Potter <[e-mail]>
Subject: Re: How to prevent a large core-dump
Date: 2 Sep 92 15:38:13 GMT
Sender: [e-mail]
Followup-To: comp.unix.admin
Nntp-Posting-Host: crane.cis.ufl.edu
To:       [e-mail]

In article <[e-mail]>, [e-mail] (Adwin Soos) writes:
|> Hello netters,
|>
|> A few weeks or even months ago I have read some discussion about the problem
|> of preventing a core-dump. I remember that there were some suggestions on how
|> to prevent that a large core-dump will be made.
|> This person is not using this core to debug it so maybe we can just stop the
|> creation of this core for this person.
|> Is there someone who can mail me such suggestions?
|>
Assuming the person is using some form of csh, why not just place a limit on the
coredump size....
Place this in the .cshrc:
limit coredumpsize 0

This will completely stop coredumps from being written.

--
"There are worlds out there where the sky is burning.  The sea's asleep, and
the rivers dream.  People made of smoke and cities made of sound.  Somewhere
there's danger.  Somewhere there's injustice.  Somewhere else the tea's getting
cold.     Come on Ace, we've got work to do." -Dr Who, [e-mail]

-----------------------------

From: Guy Harris <[e-mail]>
Subject: Re: How to prevent a large core-dump
Date: 2 Sep 92 22:53:14 GMT
Sender: [e-mail]
Followup-To: comp.unix.admin
Nntp-Posting-Host: bootme.auspex.com
To:       [e-mail]

>You won't get a core dump if the executable is stripped.  Am I the only
>one who's noticed this?

The only other people who have noticed it are, presumably, the other
people running a version of UNIX that doesn't produce core dumps if a
process running a program whose image is stripped blows up.

I've yet to see any such version of UNIX....

-----------------------------

From: Karl Keyte <[e-mail]>
Subject: 'at' jobs - getting rid of mail
Date: 2 Sep 92 16:21:35 GMT
Organisation: European Space Operation Centre (E.S.O.C)
To:       [e-mail]


How do I submit an 'at' job so I don't get any mail back?  The
documentation says that the output of the job will be mailed unless
I redirect it elsewhere.  For example,

demo.atfile contains:

(mycommand &) >/dev/null


and I can do a:

at now + 1 min demo.atfile


But I still get a mail back.  How do I stop this mail?

Please answer directly to me if you can - thanks.

Karl

-----------------------------

From: alan dare <[e-mail]>
Subject: Need help from a make guru
Date: 2 Sep 92 19:19:56 GMT
Sender: USENET Network News <[e-mail]>
Originator: [e-mail]
To:       [e-mail]


In our application we wanted to keep the object and source separate from
each other in a directory structure as shown below:

            <topdir>
               |
              / \
               obj  src

My current makefile does this quite well. It also doesn't require a separate
condition for each source. Problem: Several users add modules to a
executive then compile it. It would would be nice if they didn't have to
modify the makefile. The makefile would just compile any source file in the
current directory. I have taken several stabs at it, but I am not having
any luck. All I need for it to work is a variable containing a list of
the source and a variable containing the objects with the directory path
"../obj/" prefixed to it.  Below is a makefile that would compile all *.c and
create a a.out file. However, I can't get make to execute the shell command
correctly on the OBJECTS line correctly (the line is a valid shell command).

OBJDIR = ../obj

SOURCE=*.c
OBJECTS=`for i in \`ls *.c |sed 's/\.c/.o/g'\`; do echo "../obj/$i"; done`
$(OBJDIR)/a.out:  $(OBJECTS)
    cc -o $@ $(OBJECTS)

$(OBJECTS) : $SOURCE
    cc -c $(OPT)  $(@F:o=c) -o $@

Can anybody tell me how I can get the OBJECT variable set correctly?

Thanks to any and all.
--

*********************************************************************
Alan Dare                     |  Internet : [e-mail]
NASA Langley Research Center  |

-----------------------------

From: John Tillema <[e-mail]>
Subject: Fixing Corrupted Tar files?
Keywords: tar,corrupt
Date: 2 Sep 92 20:59:48 GMT
Sender: [e-mail]
To:       [e-mail]

Is there any way to do this? (fix corrupted tar files?)  Are
there any utilties that will do this?

Thanks,
John
[e-mail]
[e-mail]

-----------------------------

From: Ajay Shah <[e-mail]>
Subject: Re: Shell Scripts vs. C programs
Keywords: shell script, C
Date: 2 Sep 92 22:17:51 GMT
Sender: Ajay Shah <[e-mail]>
NNTP-Posting-Host: almaak.usc.edu
To:       [e-mail]

[e-mail] (Don Steiny) writes:

>program.     Besides, there are still many systems that do not have ksh,
>unfortunately, I have to use them all the time.   Even on Sun's, ksh is
>a "local" program and is not always there.

There is a PD port of ksh, dunno how perfect it is.
For this reason I've standardised on bash, but scripts are all !/bin/sh

Hopefully something like bash will proliferate far and wide, and then
it'll be a good idea writing !/usr/bin/bash.

        -ans.
--
Ajay Shah, [phone], [e-mail]

-----------------------------

From: Bill Miller <[e-mail]>
Subject: need script to rename uppercase filenames
Keywords: script,tar,msdos
Date: 2 Sep 92 22:26:57 GMT
To:       [e-mail]

Hi, everyone.

I'm fairly new to unix, and I need a script or procedure to do the following:

I have some source code in DOS (many separate files) that I tarred under
DOS and untarred under 386BSD.  The big problem is that all the files
came through in UPPERCASE and I need a script to mv (rename) them all
to lowercase quickly.

Since they're in DOS text format, I realize I also need to strip the
extra carriage returns on each line.  I've been successful in doing this
with:

  cat (file) | tr -d '\015' > (newfile)

It would be nice to combine both of these so that I could rename the
files to uppercase and strip the extra newlines all in one fell swoop
instead of doing it one file at a time.

-----------------------------

From: "Brian D. Schieber" <[e-mail]>
Subject: Dear vi guru,
Date: 2 Sep 92 22:41:36 GMT
Sender: Usenet <[e-mail]>
Nntp-Posting-Host: shark.gsfc.nasa.gov
To:       [e-mail]

Dear vi guru,

 I like to use tabs alot in just about every session of vi I
work with, It would be great if I had a macro or whatever that
could replace the tabs with the appropriate number of spaces
in a file WHILE in vi. Do you have such a macro?

Most graciously,
 Brian

p.s. please send all suggestions to switch to EMACS to /dev/null

-----------------------------

From: Tom Parker <[e-mail]>
Subject: Re: Dear vi guru,
Date: 2 Sep 92 23:33:30 GMT
Sender: USENET Maintenance <[e-mail]>
To:       [e-mail]

In article <[e-mail]> [e-mail] (Brian D. Schieber) writes:
>Dear vi guru,
>
> I like to use tabs alot in just about every session of vi I
>work with, It would be great if I had a macro or whatever that
>could replace the tabs with the appropriate number of spaces
>in a file WHILE in vi. Do you have such a macro?

Check if your system has the 'expand' command.  This command converts
tabs to spaces, and vice versa.

--
+--------------------------------------------------------------------+
| Tom Parker             |  National Center for Atmospheric Research |
| [e-mail]  |  [phone]                           |
+--------------------------------------------------------------------+

-----------------------------

From: Will Sadkin <[e-mail]>
Subject: spawning dbx on ones' self
Date: 2 Sep 92 23:08:34 GMT
Sender: Will Sadkin <[e-mail]>
NNTP-Posting-Host: daedalus.bbn.com
To:       [e-mail]


To Unix wizards who read this group,

I have an application where I need to have it start up a dbx on itself
a certain point in it's execution.  (For reasons I won't go into here, running
dbx on the process from the start just won't do...) The basic scheme I came
up with is to:
    get the pid for the process
    fork
    in child:
    run dbx on the pid of the parent
    in parent:
    stop

Unfortunately, I cannot get this to work...

If the parent sends itself a SIGSTOP, using kill, the dbx cannot
attach, and just blocks forever.

It seems that when dbx first attaches to a process it sends its own
SIGSTOP.  So I tried doing a sigpause(SIGSTOP), but this is not allowed.

I tried calling just pause in the parent; this results in the dbx
wedging, not accepting keyboard input; the same result happens if
I simply call sleep. (What is happening here?)

Am I violating any fundamental rules?  If so, please let me know
where I've gone wrong, and if not, does anyone out there have a
solution to this problem?

/Will

 -------------------------------------------------------------------------------
Will Sadkin                | "Never draw what you can copy;
BBN Systems & Technologies |  never copy what you can trace;
[e-mail]            |  never trace what you can cut out and paste down!"
 -------------------------------------------------------------------------------

-----------------------------


End of INFO-UNIX Digest
***********************