minzhi@eniac.seas.upenn.edu (Min-Zhi Shao) (02/16/91)
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: 898-2491
Home Phone: 387-4104
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
^
|
|
I found it really interesting. Does anybody up there know what does the
"p" mean and how it works?
Have fun!
Min-Zhi
minzhi@eniac.seas.upenn.edumike (02/17/91)
In an article, Min-Zhi Shao wrote: |When I fingered our system administrator, I got the following result: [...] |the .plan file in his home directory looks like: | |prw-r--r-- 1 gardella 0 Feb 15 23:48 /home/cets/gardella/.plan | |I found it really interesting. Does anybody up there know what does the |"p" mean and how it works? This means that his plan file is actually a named pipe (FIFO), and no doubt there is a daemon sitting on the other end of that pipe handing back the information you're reading. -- Michael Stefanik, MGI Inc., Los Angeles| Opinions stated are not even my own. Title of the week: Systems Engineer | UUCP: ...!uunet!bria!mike ------------------------------------------------------------------------------- Remember folks: If you can't flame MS-DOS, then what _can_ you flame?
rembo@unisoft.UUCP (Tony Rems) (02/22/91)
In article <37675@netnews.upenn.edu> minzhi@eniac.seas.upenn.edu (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: 898-2491 > Home Phone: 387-4104 > >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/* rembo@unisoft.com */ 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 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
thg@kama.ESD.3Com.COM (Thomas Guenther) (05/10/91)
Any ideas on why, when I use 'finger' on anyone in my own company, it works fine, but when I try to 'finger' anyone outside the company it won't do it? The message I get is something like the following. If I were to finger joeuser@companyb.com I would immediately get the response: [companyb.com] connect: Network is unreachable. Any clues as to how I would go about fingering this unreachable joeuser? I have no trouble emailing, only when using 'finger'. Thanks. Tom thg@kama.dev.3com.com
rickert@mp.cs.niu.edu (Neil Rickert) (05/10/91)
In article <225@bridge2.ESD.3Com.COM> thg@kama.ESD.3Com.COM (Thomas Guenther) writes: >Any ideas on why, when I use 'finger' on anyone in my own company, >it works fine, but when I try to 'finger' anyone outside the company >it won't do it? The message I get is something like the following. >If I were to finger joeuser@companyb.com I would immediately get the response: > >[companyb.com] connect: Network is unreachable. This is because you are not really on Internet. You are on a private network. Some of the hosts on that network are also on Internet, and your email system is configured to relay your messages to a host which is on Internet, so can deliver the mail. But to use services such as 'finger', 'telnet' or 'ftp' you must either be on Internet, or you must limit your use of these services to hosts within your private network. -- =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Neil W. Rickert, Computer Science <rickert@cs.niu.edu> Northern Illinois Univ. DeKalb, IL 60115 +1-815-753-6940