Source Code 1992 March/Source_Code_CD-ROM_Walnut_Creek_March_1992.iso/usenet/altsrcs/3/3558/plan.prog

Internet Message Format | 1991-06-29 | 9.6 KB

Return-path: <[e-mail]>
Received: from optima.cs.arizona.edu by vaxb.acs.unt.edu with PMDF#10363; Thu,
 11 Apr 1991 16:10 CST
Received: from caslon.cs.arizona.edu by optima.cs.arizona.edu (4.1/15) id
 AA23217; Thu, 11 Apr 91 14:09:13 MST
Received: by caslon.cs.arizona.edu; Thu, 11 Apr 91 14:09:11 -0700
Date: Thu, 11 Apr 91 14:09:10 MST
From: Jim Armstrong <[e-mail]>
Subject: RE: fingeree ...
In-reply-to: <[e-mail]>; from "christopher williams"
 at Apr 11, 91 2:46 pm
To: [e-mail] (christopher williams)
Message-id: <[e-mail]>
X-Envelope-to: CGW
X-Mailer: ELM [version 2.3 PL8]

> >About a month ago there was a sample program posted to this newsgroup that
> >set up a FIFO named pipe as your .plan file.  I modified the code to set up
> >a simple (perhaps naive) finger monitor for users on my machine.  The process
> do you still have the source for it? would you send it to me?

Here is the article which appeared in comp.unix.questions a while back.  It
contains generic code that will run any program you want whenever a certain
file is accessed (i.e. the .plan file in this case).  All you have to do is
compile it (it creates an executable called 'plan') and then to get it
running say 'plan a.out &' where a.out is some program you have written.
I don't have my program any more, but basically what I did was a ps au
within that program.  It used egrep to search for someone currently fingering
me and appended the output to a file.  To get really fancy you could then
read from that file to find out exactly who it is (all in the same program)
and print out a nice personal message to whoever is fingering you as part
of what looks to be your .plan file.  A couple of things to watch out for:
If the finger is remote, the ps au won't find anything.  Also, if two people
finger you at the same time you may run into trouble, but I didn't try
experimenting with this too much.  I also found it helpful to timestamp a
date to the file, too (I used localtime() for efficiency).  This makes it
easier to look back later at the file and see who's been fingering you and
when while you were not logged on.  It also helpful in debugging your program.

So set up this code and experiment with different programs.  Just be creative
and see what else you can do with it.  One idea I used for a while is making
it print a different quote each time.  The possibilites are endless.  Enjoy.

Jim


Article 31270 of comp.unix.questions:
Path: arizona!arizona.edu!cerritos.edu!usc!sdd.hp.com!wuarchive!uunet!unisoft!rembo
From: [e-mail] (Tony Rems)
Newsgroups: comp.unix.questions
Subject: Re: Finger
Message-ID: <[e-mail]>
Date: 22 Feb 91 02:44:17 GMT
References: <[e-mail]>
Reply-To: [e-mail] (Tony Rems)
Organization: UniSoft Corporation -- UNIX R Us.
Lines: 254

In article <[e-mail]> [e-mail] (Min-Zhi Shao) writes:
>
>    When I fingered our system administrator, I got the following result:
>
>_________________________________________________________________________
>Login name: gardella              In real life: Ed Gardella [CETS]
>Directory: /home/cets/gardella          Shell: /usr/local/bin/bash
>On since Feb 15 19:49:04 on ttyp1 from TSTEST.SEAS.UPEN
>14 minutes Idle Time
>No unread mail
>Project: System Administrator eniac.seas.upenn.edu
>Plan:
>         Meander about until something interesting comes along.
>
>Office: 154 Moore Building           Work Phone: [phone]
>                                     Home Phone: [phone]
>
>I have been fingered 3 times today
>_________________________________________________________________________
>
>the .plan file in his home directory looks like:
>
>prw-r--r--  1 gardella        0 Feb 15 23:48 /home/cets/gardella/.plan
>^

As you have found out by now, I'm sure, the p means that this is
a named pipe aka a FIFO.  If you'd like to do this yourself, here
is a little program I wrote to do it (see the comments at the
the beginning of the plan.c file for usage info):

Here's the shar of my plan program, just cut up until it says
"cut here", and then type 'sh filename' using whatever filename
you save it as.  If you use 'plan' it will get overwritten.

The code here should compile w/o any problems on any BSD machine,
I have tried it on a Sun, Vax 750, and Pyramid 90x.  It should
also work properly on any SVR4.0 machine.

The code is pretty heavily commented so it should be self
explanatory.

Note that you should put a -DFILENAME="your_home_dir/.plan"
to get it to put your path in, or you can just edit the
source and change the value of FILENAME permanently.

If you have any problems getting it compiled, just send me mail.

Enjoy.

-Tony

-------------------------cut-here------------------------------------
#! /bin/sh
# This is a shell archive.  Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file".  To overwrite existing
# files, type "sh file -c".  You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g..  If this archive is complete, you
# will see the following message at the end:
#        "End of shell archive."
# Contents:  Makefile plan.c
# Wrapped by rembo@unisoft on Mon Oct  8 10:22:34 1990
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'Makefile' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'Makefile'\"
else
echo shar: Extracting \"'Makefile'\" \(1408 characters\)
sed "s/^X//" >'Makefile' <<'END_OF_FILE'
DEST          = /users/eng/rembo/.unisoftbin
X
XEXTHDRS          = /usr/include/fcntl.h \
X        /usr/include/signal.h \
X        /usr/include/stdio.h \
X        /usr/include/sys/fcntl.h \
X        /usr/include/sys/file.h \
X        /usr/include/sys/stat.h \
X        /usr/include/sys/sysmacros.h \
X        /usr/include/sys/sysmacros.h \
X        /usr/include/sys/types.h \
X        /usr/include/sys/types.h
X
HDRS          =
X
LDFLAGS          =
X
LIBS          =
X
LINKER          = cc
X
MAKEFILE      = Makefile
X
OBJS          = plan.o
X
PRINT          = pr
X
PROGRAM          = plan
X
SRCS          = plan.c
X
all:        $(PROGRAM)
X
X$(PROGRAM):     $(OBJS) $(LIBS)
X        @echo -n "Loading $(PROGRAM) ... "
X        @$(LINKER) $(LDFLAGS) $(OBJS) $(LIBS) -o $(PROGRAM)
X        @echo "done"
X
clean:;        @rm -f $(OBJS)
X
depend:;    @mkmf -f $(MAKEFILE) PROGRAM=$(PROGRAM) DEST=$(DEST)
X
index:;        @ctags -wx $(HDRS) $(SRCS)
X
install:    $(PROGRAM)
X        @echo Installing $(PROGRAM) in $(DEST)
X        @install -s $(PROGRAM) $(DEST)
X
print:;        @$(PRINT) $(HDRS) $(SRCS)
X
program:        $(PROGRAM)
X
tags:           $(HDRS) $(SRCS); @ctags $(HDRS) $(SRCS)
X
update:        $(DEST)/$(PROGRAM)
X
X$(DEST)/$(PROGRAM): $(SRCS) $(LIBS) $(HDRS) $(EXTHDRS)
X        @make -f $(MAKEFILE) DEST=$(DEST) install
X###
plan.o: /usr/include/sys/types.h /usr/include/sys/sysmacros.h \
X    /usr/include/sys/sysmacros.h /usr/include/sys/file.h \
X    /usr/include/sys/fcntl.h /usr/include/sys/types.h \
X    /usr/include/fcntl.h /usr/include/stdio.h /usr/include/sys/stat.h \
X    /usr/include/signal.h
END_OF_FILE
if test 1408 -ne `wc -c <'Makefile'`; then
    echo shar: \"'Makefile'\" unpacked with wrong size!
fi
# end of 'Makefile'
fi
if test -f 'plan.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'plan.c'\"
else
echo shar: Extracting \"'plan.c'\" \(2197 characters\)
sed "s/^X//" >'plan.c' <<'END_OF_FILE'
X
X/*    THIS IS THE UNPUBLISHED SOURCE CODE OF REMBO        */
X/*    The copyright notice above does not evidence any       */
X/*    actual or intended publication of such source code.    */
X/*    So, use it if you like, but give me credit.        */
X
X
X/*     Usage: plan program_name             */
X
X
X/*    Description:                    */
X
X/*     This program takes the full pathname of an    */
X/*     executable and runs it on a fifo in the     */
X/*    user's home directory named .plan.  This    */
X/*     way, when finger is executed, the output    */
X/*     of the program goes to the fifo.        */
X
X/*    Written by:  Tony Rems                 */
X
X/*     Send bugs and flames to /dev/null or         */
X/*     [e-mail]                 */
X
X#include <sys/types.h>
X#include <sys/file.h>
X#include <stdio.h>
X#include <fcntl.h>
X#include <sys/stat.h>
X#include <signal.h>
X
X/* Defines */
X#define FILENAME "/users/eng/rembo/.plan"
X#define PERMS 0666
X#define USAGE "%s program_name\n"
X
X/* Function prototypes */
void sig_handler();
X
main (argc, argv)
int argc;
char *argv[];
X{
X    int fd;
X    int pid;
X    int status;
X
X    if ( argc !=2 ) {
X        fprintf (stderr, USAGE, argv[0]);
X        exit(1);
X    }  /* if */
X
X/* Catch interrupts for cleanup */
X    signal(SIGTERM, sig_handler);
X    signal(SIGINT, sig_handler);
X    signal(SIGHUP, sig_handler);
X
X    unlink (FILENAME);
X
X/* Make the fifo */
X    if ((mknod(FILENAME, S_IFIFO | PERMS, 0)) < 0 ) {
X        perror("mknod");
X        exit(2);
X    }  /* if */
X
X    while (1) {
X        if ((fd = open(FILENAME, O_WRONLY)) < 0 ) {
X            perror("open");
X            exit(3);
X        } /* if */
X
X/* Once our open completes we know that someone else has
X * opened the FIFO for reading, so we can know run our
X * program on it.  So, we fork, exec our program and
X * wait for the child to complete.
X */
X        switch (pid = fork()) {
X            case -1:
X                perror("fork");
X                exit(4);
X                break;
X            case 0:
X/* If we're in the child, we copy our fifo to stdout */
X/* and exec the program given */
X                dup2(fd, 1);
X                execlp(argv[1],argv[1],(void *)NULL);
X                perror("child returned");
X                exit(5);
X                break;
X            default:
X/* If we're in the parent, we close the pipe and wait */
X                close(fd);
X                while (wait(&status) != pid)
X                    ;
X                break;
X        } /* switch */
X        sleep(2);
X        close(fd);
X    } /* while */
X} /* main */
X
void sig_handler()  /* cleanup */
X{
X    unlink(FILENAME);
X    exit(0);
X}
END_OF_FILE
if test 2197 -ne `wc -c <'plan.c'`; then
    echo shar: \"'plan.c'\" unpacked with wrong size!
fi
# end of 'plan.c'
fi
echo shar: End of shell archive.
exit 0