Source Code 1994 March/Source_Code_CD-ROM_Walnut_Creek_March_1994.iso/compsrcs/unix/volume26/faucet/part01

Text File | 1993-01-29 | 55.8 KB | 1,699 lines

Newsgroups: comp.sources.unix
From: [e-mail] (Robert Forsman)
Subject: v26i086: faucet - pipe-like functionality over TCP sockets, Part01/01
Sender: [e-mail]
Approved: [e-mail]

Submitted-By: [e-mail] (Robert Forsman)
Posting-Number: Volume 26, Issue 86
Archive-Name: faucet/part01

This shar has the source for two utilities that give you the power of the
"|" (pipe) over the network.  I'd like to see these two programs become
standard features on all machines with Berkeley stream sockets.

You may be amused to know that the source code for these programs is smaller
than the copyright terms.  Pretty disgusting that it's so hard to give away
free software :)

And yes, I *DO* have man pages this time, but they could lose a few rough
edges.  I welcome comments on the documentation and the source code.  If it
doesn't make instantly on your machine, tell me why and I'll try to make it
easier next time.

    [e-mail] (Robert Forsman)

#! /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 archive 1 (of 1)."
# Contents:  COPYING MANIFEST Makefile README faucet.1 faucet.c hose.1
#   hose.c portname.c
# Wrapped by [e-mail] on Sat Jan 30 16:56:52 1993
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'COPYING' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'COPYING'\"
else
echo shar: Extracting \"'COPYING'\" \(17981 characters\)
sed "s/^X//" >'COPYING' <<'END_OF_FILE'
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END_OF_FILE
if test 17981 -ne `wc -c <'COPYING'`; then
    echo shar: \"'COPYING'\" unpacked with wrong size!
fi
# end of 'COPYING'
fi
if test -f 'MANIFEST' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'MANIFEST'\"
else
echo shar: Extracting \"'MANIFEST'\" \(393 characters\)
sed "s/^X//" >'MANIFEST' <<'END_OF_FILE'
X   File Name        Archive #    Description
X-----------------------------------------------------------
X COPYING                    1
X MANIFEST                   1    This shipping list
X Makefile                   1
X README                     1
X faucet.1                   1
X faucet.c                   1
X hose.1                     1
X hose.c                     1
X portname.c                 1
END_OF_FILE
if test 393 -ne `wc -c <'MANIFEST'`; then
    echo shar: \"'MANIFEST'\" unpacked with wrong size!
fi
# end of 'MANIFEST'
fi
if test -f 'Makefile' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'Makefile'\"
else
echo shar: Extracting \"'Makefile'\" \(1264 characters\)
sed "s/^X//" >'Makefile' <<'END_OF_FILE'
X#    faucet and hose: network pipe utilities
X#    Copyright (C) 1992 Robert Forsman
X#
X#    This program is free software; you can redistribute it and/or modify
X#    it under the terms of the GNU General Public License as published by
X#    the Free Software Foundation; either version 2 of the License, or
X#    (at your option) any later version.
X#
X#    This program is distributed in the hope that it will be useful,
X#    but WITHOUT ANY WARRANTY; without even the implied warranty of
X#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X#    GNU General Public License for more details.
X#
X#    You should have received a copy of the GNU General Public License
X#    along with this program; if not, write to the Free Software
X#    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X
X#
X# under HPUX you will probably have to make using LDLIBS=-lBSD
X#
X
CFLAGS =
X
XFOBJS = faucet.o portname.o
HOBJS = hose.o portname.o
ALL =    faucet hose
X
all    : ${ALL}
X
faucet    : ${FOBJS}
X    ${CC} ${CFLAGS} -o $@ ${FOBJS} ${LDLIBS}
X
hose    : ${HOBJS}
X    ${CC} ${CFLAGS} -o $@ ${HOBJS} ${LDLIBS}
X
install : all
X    cp faucet hose ${HOME}/bin/`mach`
X
clean    :
X    rm -f ${FOBJS}  ${HOBJS}  ${ALL}
X    rm -f *.o *~ *.CKP *.BAK core a.out
X
spotless: clean
X    rm -f *~ core  hose faucet
END_OF_FILE
if test 1264 -ne `wc -c <'Makefile'`; then
    echo shar: \"'Makefile'\" unpacked with wrong size!
fi
# end of 'Makefile'
fi
if test -f 'README' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'README'\"
else
echo shar: Extracting \"'README'\" \(6764 characters\)
sed "s/^X//" >'README' <<'END_OF_FILE'
X
X"Mutant" Bob Forsman and his amazing 43 burner stove present
X------------------------------------------------------------
X            "stuff"
X------------------------------------------------------------
X
X  This directory contains faucet and hose.
X
X
X
faucet and hose:
X
X  These two utilities are useful for connecting arbitrary programs
over sockets.  The power of the '|' characeter in the shell can now be
used over the network.
X  As an example of what they can do, compile them and on one machine
type
X
lightning:21 % ./faucet 3000 "tar cf - ." out
X
X and on another type
X
springs:3 % ./hose lightning 3000 "tar tvf -" in
X
X  You will get output (from machine springs) that looks like this.
X
rwxr-xr-x771/50      0 Jul  7 11:53 1990 ./
rw-r-----771/50   9266 Jun 30 21:41 1990 ./faucet.c~
rw-r--r--771/50   6086 Mar  6 21:40 1990 ./server.cc
rw-r--r--771/50   1203 Jul  7 11:49 1990 ./Makefile
rw-r-----771/50   9757 Jul  7 11:49 1990 ./faucet.c
rw-r--r--771/50   4241 Jun 23 04:09 1990 ./hose.c~
rwxr-xr-x771/50  24576 Jul  7 11:50 1990 ./hose
rw-r--r--771/50   4041 Jul  7 11:50 1990 ./hose.c
rw-r-----771/50    592 Jul  7 11:48 1990 ./portname.c
rw-r--r--771/50    317 Jul  7 11:48 1990 ./portname.o
rwxr-xr-x771/50  24576 Jul  7 11:50 1990 ./faucet
rw-r--r--771/50   3378 Jul  7 11:50 1990 ./hose.o
rw-r--r--771/50   1069 Jun 23 02:42 1990 ./Makefile~
rw-r--r--771/50   4662 Jul  7 11:50 1990 ./faucet.o
rw-r-----771/50    377 Jul  7 11:53 1990 ./#README#
rw-r-----771/50    371 Jul  7 11:53 1990 ./README
rw-r--r--771/50   2917 Mar  6 22:13 1990 ./client.cc
X
X  The 3000 is the port number to connect to.  Normal users can use any
number over 1023.  You can also specify a service name in place of a
number since the program can look it up from the services database.
X  The argument in ""s (argv[2] for faucet, argv[3] for hose) is the
command to be connected to the socket.  The flags in, out and err
govorn which file descriptors get connected to the socket after the
connection is successful.
X  hose is a one-shot program.  It connects to the foreign server
socket and execs the command.  faucet is an undying server.  Every
time it recieves a connection on its socket it forks and execs a "csh
X-c".  faucet can be limited to one-shot by the "once" flag.
X
SYNTAX
X
X   faucet <port> <command> (in|out|err)+ [once] [verb(|ose)] [quiet]
X        [unix] [foreignport <port>] [foreignhost <host>]
X
X   hose <hostname> <port> <command> (in|out|err)+ [unix] [localport <port>]}
X
X  Host names can be be the name of the machine or (if no name is
found) the internet number.  The individual numbers are sscanfed with
X%i so 0x or 0 prefixes mean hex or octal instead of decimal for that
one byte.
X  You must chose at least one of in, out, and err.  The other flags
are optional and listed below
X   unix.........causes the program to go into unix-domain socket mode.
X        hose can also be forced into unix-domain operation by
X        specifying -unix- as the hostname (those dashes are
X        part of the arg) or by being run with argv[0] as the
X        string "uhose" (possible by hardlinking the binary).
X        Port names are then treated as unix domain socket
X        addresses (filenames) as opposed to internet port
X        numbers.
X   localport....(only on hose) asks hose to bind to a specific local
X        port.
X   once.........(only on faucet) the faucet command will not fork, but
X        will exec the command, and when the command exits
X        you're done.
X   verbose|quiet (only on faucet) enables|disables the printing of
X        extra information such as what host and port faucet is
X        getting connections from.
X   foreignport..(only on faucet) causes faucet to refuse (close
X        immediately) any connection from a machine that hasn't
X        bound its socket to the port specified immediately
X        after the foreignport flag.  This can be used with the
X        localport option of hose to perform crude
X        authentication.  If the foreignport is <1024 then only
X        a foreign root user will be able to connect to your
X        faucet because only root can bind to a port number
X        below 1024.
X   foreignhost..(only on faucet) causes faucet to refuse (close
X        immediately) any connection from any machine other
X        than the host specified immediately after the
X        foreignhost flag.
X
X  Be aware that addresses and ports can be spoofed if your network
isn't secure (yours probably isn't).  If you have PCs or other
non-UNIX boxes connected to the network, then it's DISGUSTINGLY easy
for ANYONE to spoof the network.
X
X
X
XEXAMPLES
X
X    FAUCET                    HOSE
X
reef:100 % ./faucet chat "echo send
X$14M and 2 airline stewardesses or
you'll never see Hoffa alive"
foreignhost azalea verbose out
X
X                reef:40 % ./hose reef chat cat in
X
refusing connection from host 128.
X227.224.61(reef.cis.ufl.edu).
X
X                azalea:20 % ./hose reef chat cat in
X
X./faucet: Got connection from 128.
X227.224.55(azalea.cis.ufl.edu) port
X1687
Unmatched '.
X                /* darn, screwed up the shell quoting */
X^C
X
reef:107 % ./faucet /tmp/blah 'echo
send '\'\$14M\'' and 2 airline
stewardesses or you'\\\''ll never
see Hoffa alive' foreignhost azalea
verbose out foreignport /tmp/auth unix
X./faucet: foreignhost parameter makes no
sense with UNIX domain sockets, ignoring.
X                /* %#@)*, bite me */
X
X                reef:41 % ./hose -unix- /tmp/blah cat in
X
X./faucet: refusing connection from port
X
X                reef:43 % ./hose -unix- /tmp/blah cat in
X                localport /tmp/auth
X
X./faucet: Got connection from /tmp/auth
X
X                send $14M and 2 airline stewardesses or
X                you'll never see Hoffa alive
X
X
X  Notice the elaborate quoting on that one.  faucet+hose fork a "csh
X-c " to interpret the command.  The echo command had to be quoted so
that faucet saw:
X
echo send '$14M' and 2 airline stewardesses or you\'ll never see Hoffa alive
X
X  faucet then performed this system call
X
execl("/bin/csh","csh","-c",argv[2],NULL);
X
X  and the "$14M" and "you'll" were properly quoted to survive THAT csh
as well.  Commands to hose must be similarly protected.
X
X  Why use csh?
X   1) This allows you to have pipelines and other fancy stuff inside
X    the command, and
X   2) I don't have to write code to parse the command!
X
X
X
BUGS
X
X  Hoohoohoo, god knows what sort of bugs are waiting to rip your
ankles off.  I'm the only one who's extensively used these.  They were
developed on Sun3s and Sun4s.  They have been compiled (but not
extensively tested) on Sonys, DECstations and HPs.  If your machine
needs different include files, start grepping and mail me the results.
X
X  If anything is not crystal clear, check the source and mail me.
I'll try to put it in the README.
X
X  I need to dragoon someone into writing a man page for this.
X
X
AUTHOR
X
X  Robert H. Forsman Jr.        <[e-mail]>
X  former underpaid Systems Programmer
X  now piddly underpaid Research Assistant
X  University of Florida
X  Department of Computer
X  and Information Science
END_OF_FILE
if test 6764 -ne `wc -c <'README'`; then
    echo shar: \"'README'\" unpacked with wrong size!
fi
# end of 'README'
fi
if test -f 'faucet.1' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'faucet.1'\"
else
echo shar: Extracting \"'faucet.1'\" \(4160 characters\)
sed "s/^X//" >'faucet.1' <<'END_OF_FILE'
X.\" faucet.1 Copyright 3/30/1992 by Robert Forsman
X.TH FAUCET 1 "Mar 30 1992"
X.SH NAME
faucet - a fixture for a BSD network pipe
X.SH SYNOPSIS
X\fBfaucet\fP \fIport\fP \fIcommand\fP (\fBin\fP|\fBout\fP|\fBerr\fP)
X[\fBonce\fP] [\fBverbose\fP] [\fBquiet\fP] [\fBunix\fP]
X[\fBforeignhost\fP \fIhost\fP] [\fBforeignport\fP \fIport\fP]
X
X.SH DESCRIPTION
X.LP
X.B faucet
attempts to provide the functionality of pipes over the network.
It behaves as the server end of a server\-client connection.
When used with
X.B hose(1)
it can function as a replacement for
X.IP
tar \-cf \- . | rsh other "cd destdir; tar -xf -"
X.LP
X.B faucet
and
X.B hose
are especially useful when you don't have easy access to the
destination machine.
X
X.LP
X.B faucet
creates a BSD socket, binds it to the
X.I port
specified on the command line, and listens for connections.
XEvery time
X.B faucet
gets a connection it forks the
X.I command
with stdin, stdout, and/or stderr redirected according to the
X.B in out err
flags.  If the
X.B once
flag is specified,
X.B faucet
will exec(2) the
X.I command
instead of fork(2)ing and exec(2)ing.
X.B once
means that the network pipe
is only good for one shot.
The
X.B verbose
flag specifies that
X.B faucet
should print information about connecting hosts .  This information
includes the numeric host address, host names, and foreign port numbers.
The
X.B quiet
flag specifies that
X.B faucet
should NOT print such info.
X.B quiet
is the default. The
X.B unix
flag specifies that the
X.I port
is not an internet port number or service name, but instead it is a
filename for a UNIX domain socket.  The
X.B foreignhost
option specifies that faucet should reject all connections that do not
come from the
X.I host
machine.  Similarly
X.B foreignport
specifies that faucet should reject all connections that are not bound
on their local machine to the
X.I port
argument.  The above two options allow a crude form of authentication.
Note that on most systems only root can bind a socket to a port number
below 1024.
X
X.SH "EXAMPLES"
X.LP
This creates a TCP\-IP socket on the local machine bound to port 3000.
X.IP
example% faucet 3000 "tar -cf - ." out verbose
X.LP
XEvery time some process (from any machine) attempts to connect to
port 3000 on this machine the
X.B faucet
program will fork(2) a process and the child will exec(2) a
X.IP
X/bin/csh -c "tar -cf - ."
X.LP
The
X.B out
option means that the output of the child process will have been
redirected into the new socket retrieved by the accept(2) call.
X.B verbose
means that faucet will print information about each new connection.
X
X.LP
This creates a UNIX domain socket in the current directory
X.IP
example% faucet u-socket "dd if=angio.pgm" out err once
X.LP
The
X.B out err
option means that stdout and stderr will be redirected in the child
process.  The
X.B once
option means that the faucet will not fork(2), but exec(2) the process
so that only the first process can connect to the u-socket before the
faucet becomes unavailable.
X
X.SH "SEE ALSO"
X.BR hose (1),
X.BR socket (2),
X.BR bind (2),
X.BR listen (2),
X.BR accept (2),
X.BR services (5),
X.BR gethostbyaddr (3)
X
X.SH "NOTES"
X.LP
Doubtless there are bugs in this program, especially in the unix domain
socket portions.  I welcome problem reports and would like to make
these programs as "clean" (no leftover files, sockets) as possible.
X
X.SH "COPYRIGHT"
Copyright (C) 1992 Robert Forsman
X
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
X(at your option) any later version.
X
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
X
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
XFoundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X
X.SH "AUTHOR"
X Robert Forsman
X [e-mail]
X University of Florida
X Department of Computer and Information Science
END_OF_FILE
if test 4160 -ne `wc -c <'faucet.1'`; then
    echo shar: \"'faucet.1'\" unpacked with wrong size!
fi
# end of 'faucet.1'
fi
if test -f 'faucet.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'faucet.c'\"
else
echo shar: Extracting \"'faucet.c'\" \(9476 characters\)
sed "s/^X//" >'faucet.c' <<'END_OF_FILE'
X/*
X
X    faucet.c, part of
X    faucet and hose: network pipe utilities
X    Copyright (C) 1992 Robert Forsman
X
X    This program is free software; you can redistribute it and/or modify
X    it under the terms of the GNU General Public License as published by
X    the Free Software Foundation; either version 2 of the License, or
X    (at your option) any later version.
X
X    This program is distributed in the hope that it will be useful,
X    but WITHOUT ANY WARRANTY; without even the implied warranty of
X    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X    GNU General Public License for more details.
X
X    You should have received a copy of the GNU General Public License
X    along with this program; if not, write to the Free Software
X    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X
X    */
X
static char info[] = "faucet: a network utility for sockets\nWritten 1992 by Robert Forsman <[e-mail]>\n";
X#include    <stdio.h>
X#include    <fcntl.h>
X#include    <errno.h>
X#ifdef hpux
X#include    <signal.h>
X#include    <sgtty.h>
X#endif
X#include    <sys/wait.h>
X#include    <sys/param.h>
X#include    <sys/file.h>
X#include    <sys/ioctl.h>
X#include    <sys/socket.h>
X#include    <sys/un.h>
X#include    <netinet/in.h>
X#include    <netdb.h>
X
int    mastersocket;
X#define    DOSTDOUT    (1<<0)
X#define    DOSTDIN        (1<<1)
X#define    DOSTDERR    (1<<2)
X#define    DOONCE        (1<<3)
X#define    DOVERBOSE    (1<<4)
X#define    DOUNIX        (1<<5)
long    doflags=0;
int    running=1;
X
char    *foreignhost=NULL,*foreignport=NULL;
int    foreignPORT;
struct in_addr    foreignHOST;
X
char    *programname;
extern int errno;
extern char *sys_errlist[];
X
X
int name_to_inet_port();
X
void nice_shutdown()
X/* This procedure gets called when we are killed with one of the reasonable
X   signals (TERM, HUP, that kind of thing).  The main while loop then
X   terminates and we get a chance to clean up. */
X{
X  running = 0;
X}
X
X
X/* print an internet host address prettily */
printhost(addr)
X     struct in_addr    *addr;
X{
X  struct hostent    *h;
X  char    *s,**p;
X  int    i;
X
X  h = gethostbyaddr(addr, sizeof(*addr),AF_INET);
X  s = (h==NULL) ? NULL : h->h_name;
X
X  printf("%d", ((u_char*)addr)[0]);
X  for (i=1; i<sizeof(*addr); i++)
X    printf(".%d",((u_char*)addr)[i]);
X
X  printf("(%s",s?s:"name unknown");
X  if (s)
X    for (p=h->h_aliases; *p; p++)
X      printf(",%s",*p);
X  printf(")");
X}
X
int setup_socket(name)
char *name;
X/* This procedure creates a socket and handles retries on the inet domain.
X   Sockets seem to "stick" on my system (SunOS [43].x) */
X{
X  int    sock;
X
X  sock = socket((doflags&DOUNIX)?AF_UNIX:AF_INET, SOCK_STREAM, 0);
X  /* I need a real value for the protocol eventually.  IPPROTO_TCP sounds
X     like a good value, but what about AF_UNIX sockets?  It seems to have
X     worked so far... */
X
X  if (sock <0) {
X      perror("opening stream socket");
X      exit(1);
X    }
X
X  if (!bindlocal(sock, name, (doflags&DOUNIX)?AF_UNIX:AF_INET)) {
X      fprintf(stderr,"%s: error binding stream socket %s (%s)",
X          programname,name,sys_errlist[errno]);
X      exit(1);
X    }
X
X  listen(sock,NOFILE);
X
X  return(sock);
X}
X
X
void waitonchild()
X
X{
X  union wait status;
X#if 0
X  unsigned char    reason,signal,rval;
X  char    buf[32];
X#endif
X  int    childpid;
X
X  childpid = wait3(&status,WNOHANG,NULL);
X  /* What a pity I can't easily print out child statuses */
X#if 0
X  if (childpid==-1) {
X    fputs(stderr,programname);
X    fputs(stderr,": error in wait3 while handling SIGCHLD (");
X    fputs(stderr,sys_errlist[errno]);
X    fputs(stderr,")\n");
X    return;
X  }
X  reason = status.w_status & 0xff;
X  if (reason==0) {
X    rval = reason >> 8;
X    if (rval!=0) {
X      fputs(stderr,programname);
X      fputs(stderr,": Child ");
X      sprintf(buf,"%d",childpid);    fputs(stderr,buf);
X      fputs(stderr," gave abnormal exit code ");
X      sprintf(buf,"%d",rval);    fputs(stderr,buf);
X      fputs(stderr,"\n");
X    }
X  } else if (reason!=0177) {
X    signal = reason & 0x7f;
X    fputs(stderr,programname);
X    fputs(stderr,": Child ");
X    sprintf(buf,"%d",childpid);    fputs(stderr,buf);
X    fputs(stderr," killed by signal ");
X    sprintf(buf,"%d",signal);        fputs(stderr,buf);
X    fputs(stderr," (");
X    fputs(stderr,(signal<=SIGUSR2)?signames[signal]:"bogus signal number");
X    fputs(stderr,")\n");
X  }
X#endif
X}
X
X
int
authorize_address(sin)
X     struct sockaddr    *sin;
X{
X  if (doflags&DOUNIX) {
X    struct sockaddr_un     *srv = (struct sockaddr_un*)sin;
X
X    if (foreignport != NULL && 0!=strcmp(foreignport, srv->sun_path)) {
X      if (doflags&DOVERBOSE) {
X    printf("%s: refusing connection from port %s\n",
X           programname, srv->sun_path);
X      }
X      return 0;
X    }
X  } else {
X    struct sockaddr_in    *srv = (struct sockaddr_in*)sin;
X
X    if (foreignhost!=NULL &&
X    0!=bcmp(&srv->sin_addr,
X        &foreignHOST, sizeof(foreignHOST))) {
X      if (doflags&DOVERBOSE) {
X    printf("refusing connection from host ");
X    printhost(&srv->sin_addr);
X    printf(".\n");
X      }
X      return 0;
X    }
X
X    if (foreignport!=NULL && foreignPORT != srv->sin_port) {
X      if (doflags&DOVERBOSE) {
X    printf("refusing connection from port %d.\n",
X           ntohs(srv->sin_port));
X      }
X      return 0;
X    }
X  }
X
X  return 1;
X}
X
X
main (argc,argv)
int argc;
char ** argv;
X
X{
X  int    rval,length;
X  struct sockaddr    saddr;
X  struct sockaddr_in    *sinp = (struct sockaddr_in*)&saddr;
X  struct sockaddr_un    *sunp = (struct sockaddr_un*)&saddr;
X
X  programname = argv[0];
X
X  if (argc<3) {
X    fprintf(stderr,"Usage : %s <port> <command> (in|out|err)+ [once] [verb(|ose)] [quiet] [unix] [foreignport <port>] [foreignhost <host>]\n", programname);
X    exit(1);
X  }
X
X  /* parse trailing args */
X  for (length=3; length<argc; length++) {
X    if (strcmp(argv[length],"in")==0)
X      doflags |= DOSTDIN;
X    else if (strcmp(argv[length],"out")==0)
X      doflags |= DOSTDOUT;
X    else if (strcmp(argv[length],"err")==0)
X      doflags |= DOSTDERR;
X    else if (strcmp(argv[length],"once")==0)
X      doflags |= DOONCE;
X    else if (strcmp(argv[length],"verbose")==0
X         || strcmp(argv[length],"verb")==0)
X      doflags |= DOVERBOSE;
X    else if (strcmp(argv[length],"quiet")==0)
X      doflags &= ~DOVERBOSE;
X    else if (strcmp(argv[length],"unix")==0)
X      doflags |= DOUNIX;
X    else if (strcmp(argv[length],"foreignport")==0) {
X      if (length+1<argc)
X    foreignport=argv[++length];
X      else
X    fprintf(stderr,"%s: foreignport requires port name or number.\n",
X        programname);
X    } else if (strcmp(argv[length],"foreignhost")==0) {
X      if (length+1<argc)
X    foreignhost=argv[++length];
X      else
X    fprintf(stderr,"%s: foreignhost requires host name or number.\n",
X        programname);
X    } else
X      fprintf(stderr,"%s: Bogus extra command line flag \"%s\".\n",
X          programname,argv[length]);
X  }
X
X  if ( ! (doflags&(DOSTDIN|DOSTDERR|DOSTDOUT)) ) {
X    fprintf(stderr,"%s: Need at least one {in|out|err}.\n",programname);
X    exit(1);
X  }
X
X  if ( (doflags&DOUNIX) && foreignhost!=NULL ) {
X    fprintf(stderr, "%s: foreignhost parameter makes no sense with UNIX domain sockets, ignoring.\n", programname);
X    foreignhost = NULL;
X  }
X
X  signal(SIGCHLD,waitonchild);
X
X  mastersocket = setup_socket(argv[1]);
X
X  signal(SIGHUP, nice_shutdown);
X  signal(SIGINT, nice_shutdown);
X  signal(SIGPIPE, nice_shutdown);
X  signal(SIGALRM, nice_shutdown);
X  signal(SIGTERM, nice_shutdown);
X
X  if (foreignhost != NULL && !convert_hostname(foreignhost, &foreignHOST)) {
X    fprintf(stderr, "%s: could not translate %s to a host address\n",
X        programname, foreignhost);
X    exit(1);
X  }
X
X  if (foreignport!=NULL && !(doflags&DOUNIX) &&
X      0 == (foreignPORT = name_to_inet_port(foreignport)) ) {
X    fprintf(stderr,"%s: port %s unknown.\n",programname,foreignport);
X    exit(1);
X  }
X
X  while (running) {
X
X    length = sizeof(saddr);
X
X    rval = accept(mastersocket,&saddr,&length);
X
X    if (rval<0) {
X      if (errno==EWOULDBLOCK) {
X    printf("%s: No more connections to talk to.\n",programname);
X      } else if (errno!=EINTR) {
X    fprintf(stderr,"%s: error in accept (%s).",
X        programname,sys_errlist[errno]);
X    exit(1);
X      }
X      continue;
X    }
X
X    if (!authorize_address(&saddr)) {
X      close(rval);
X      continue;
X    }
X
X    if ( doflags&DOVERBOSE ) {
X      printf("%s: Got connection from ",programname);
X      if ( doflags&DOUNIX ) {
X    printf("%s\n", sunp->sun_path);
X      } else {
X    printhost(&sinp->sin_addr);
X    printf(" port %d\n",ntohs(sinp->sin_port));
X      }
X    }
X
X    fflush(stdout);
X
X    if ( doflags&DOONCE || fork()==0 ) {
X      /* child process: frob descriptors and exec */
X      char    *s;
X
X      if ( (doflags&(DOONCE|DOUNIX)) == (DOONCE|DOUNIX) )
X    unlink(argv[1]);
X      /* We don't want the unix domain socket anymore */
X
X      dup2(fileno(stderr),mastersocket);
X      ioctl(mastersocket,FIOCLEX,NULL);
X      /* We don't need old stderr hanging around after an exec.
X     The mastersocket has been closed by the dup2 */
X
X      if (doflags & DOSTDIN)
X    dup2(rval,fileno(stdin));
X      if (doflags & DOSTDOUT)
X    dup2(rval,fileno(stdout));
X      if (doflags & DOSTDERR)
X    dup2(rval,fileno(stderr));
X
X      close(rval); /* rval has been properly duplicated */
X
X      execl("/bin/csh","csh","-c",argv[2],NULL);
X      s ="exec failed\n";
X      write(mastersocket,s,strlen(s));
X      exit(0);
X    } else {
X      /* parent: close socket.
X     Signal will arrive upon death of child. */
X      close(rval);
X    }
X  }
X
X  /* clean up the socket when we're done */
X  if (doflags&DOUNIX)
X    unlink(argv[1]);
X  close(mastersocket);
X
X}
END_OF_FILE
if test 9476 -ne `wc -c <'faucet.c'`; then
    echo shar: \"'faucet.c'\" unpacked with wrong size!
fi
# end of 'faucet.c'
fi
if test -f 'hose.1' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'hose.1'\"
else
echo shar: Extracting \"'hose.1'\" \(3029 characters\)
sed "s/^X//" >'hose.1' <<'END_OF_FILE'
X.\" hose.1 Copyright 3/30/1992 by Robert Forsman
X.TH HOSE 1 "Mar 30 1992"
X.SH NAME
hose - the client end of a BSD network pipe
X.SH SYNOPSIS
X\fBhose\fP \fIhostname\fP \fIport\fP \fIcommand\fP
X(\fBin\fP|\fBout\fP|\fBerr\fP) [\fBunix\fP] [\fBlocalport\fP \fIport\fP]
X
X.SH DESCRIPTION
X.LP
X.B hose
attempts to provide the functionality of pipes over the network.
It behaves as the client end of a server\-client connection.
When used with
X.B faucet(1)
it can function as a replacement for
X.IP
tar \-cf \- . | rsh other "cd destdir; tar -xf -"
X.LP
X.B faucet
and
X.B hose
are especially useful when you don't have easy access to the
destination machine.
X
X.LP
X.B hose
creates a BSD socket and, if the
X.B localport
option is used, binds it to the port number (or service name)
specified immediately afterwards.
X.B hose
then tries to connect to the foreign machine
X.I hostname
with foreign port
X.I port
X .  If successful
X.B hose
redirects stdin, stdout, and/or stderr
according to the
X.B in out err
flags.
X.B hose
then exec(2)s a csh -f "\fIcommand\fP".
The
X.B unix
flag specifies that the
X.I port
is not an internet port number or service name, but instead it is a
filename for a UNIX domain socket.  This option may be simulated by
using
X.B -unix-
as the host name to connect to, or by renaming the
X.B hose
program to \fBuhose\fP.
X
X.SH "EXAMPLES"
X.LP
This will connect to port 3000 on the machine reef and connect the socket
to the stdin of a tar command.
X.IP
example% hose reef 3000 "tar -xf - ." in
X.LP
The command actually exec(2)ed by the
X.B hose
program is
X.IP
X/bin/csh -c "tar -xf - ."
X.LP
The
X.B in
option means that the input of the child process will have been
redirected into the socket connected to reef.
X
X.LP
This connects to a UNIX domain socket in the current directory
X.IP
example% hose u-socket "dd of=sample.pgm" in
X.LP
X
X.SH "SEE ALSO"
X.BR faucet (1),
X.BR socket (2),
X.BR bind (2),
X.BR listen (2),
X.BR accept (2),
X.BR services (5),
X.BR gethostbyaddr (3)
X
X.SH "NOTES"
X.LP
Doubtless there are bugs in this program, especially in the unix domain
socket portions.  I welcome problem reports and would like to make
these programs as "clean" (no leftover files, sockets) as possible.
X
X.SH "COPYRIGHT"
Copyright (C) 1992 Robert Forsman
X
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
X(at your option) any later version.
X
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
X
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
XFoundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X
X.SH "AUTHOR"
X Robert Forsman
X [e-mail]
X University of Florida
X Department of Computer and Information Science
END_OF_FILE
if test 3029 -ne `wc -c <'hose.1'`; then
    echo shar: \"'hose.1'\" unpacked with wrong size!
fi
# end of 'hose.1'
fi
if test -f 'hose.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'hose.c'\"
else
echo shar: Extracting \"'hose.c'\" \(4891 characters\)
sed "s/^X//" >'hose.c' <<'END_OF_FILE'
X/*
X
X    hose.c, part of
X    faucet and hose: network pipe utilities
X    Copyright (C) 1992 Robert Forsman
X
X    This program is free software; you can redistribute it and/or modify
X    it under the terms of the GNU General Public License as published by
X    the Free Software Foundation; either version 2 of the License, or
X    (at your option) any later version.
X
X    This program is distributed in the hope that it will be useful,
X    but WITHOUT ANY WARRANTY; without even the implied warranty of
X    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X    GNU General Public License for more details.
X
X    You should have received a copy of the GNU General Public License
X    along with this program; if not, write to the Free Software
X    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X
X    */
X
static char info[] = "hose: a network utility for sockets\nWritten 1992 by Robert Forsman <[e-mail]>\n";
X#include    <stdio.h>
X#include    <fcntl.h>
X#ifdef hpux
X#include    <sgtty.h>
X#endif
X#include    <sys/errno.h>
X#include    <sys/param.h>
X#include    <sys/file.h>
X#include    <sys/ioctl.h>
X#include    <sys/socket.h>
X#include    <sys/un.h>
X#include    <netinet/in.h>
X#include    <netdb.h>
X
X#define    DOSTDOUT    (1<<0)
X#define    DOSTDIN        (1<<1)
X#define    DOSTDERR    (1<<2)
X#define    DOUNIX        (1<<3)
int    doflags=0;
char    *localport=NULL;
char    *programname;
extern int    errno;
extern char *sys_errlist[];
X
X
int name_to_inet_port();
X
X
int setup_socket(hostname,portname)
char    *hostname;
char    *portname;
X
X{
X  int    sock;
X  struct sockaddr    server;
X  int length;
X
X  sock = socket((doflags&DOUNIX)?AF_UNIX:AF_INET, SOCK_STREAM, 0);
X  if (sock <0) {
X    perror("opening stream socket");
X    exit(1);
X  }
X
X  length = sizeof(server);
X
X  if (localport != NULL &&
X      !bindlocal(sock, localport, (doflags&DOUNIX)?AF_UNIX:AF_INET) ) {
X    fprintf(stderr,"%s: error binding stream socket %s (%s)",
X        programname,localport,sys_errlist[errno]);
X    exit(1);
X  }
X
X  if (doflags&DOUNIX) {
X    /* ignore the hostname parameter */
X    ((struct sockaddr_un*)&server)->sun_family = AF_UNIX;
X    strcpy( ((struct sockaddr_un*)&server)->sun_path, portname);
X  } else {
X    struct sockaddr_in *svr=(struct sockaddr_in *)&server;
X
X    ((struct sockaddr_in*)&server)->sin_family = AF_INET;
X
X    if (!convert_hostname(hostname, &svr->sin_addr)) {
X      fprintf(stderr, "%s: could not translate %s to a host address\n",
X          programname, hostname);
X      exit(1);
X    }
X
X    svr->sin_port = name_to_inet_port(portname);
X    if (svr->sin_port==0) {
X      fprintf(stderr,"%s: bogus port number %s\n",programname,portname);
X      exit(1);
X    }
X  }
X
X  if (connect(sock,(struct sockaddr*)&server,sizeof(server)) < 0) {
X    perror("connecting");
X    exit(1);
X  }
X
X  return(sock);
X}
X
X
X
X
main (argc,argv)
X     int argc;
X     char ** argv;
X
X{
X  int    rval,length;
X
X  programname=argv[0];
X
X  if (argc<4) {
X    fprintf(stderr,"Usage : %s <hostname> <port> <command> (in|out|err)+ [unix] [localport <port>]}\n",programname);
X    exit(1);
X  }
X  if (strcmp(argv[1],"-unix-")==0 || strcmp(programname,"uhose")==0 )
X    doflags |= DOUNIX;
X  for (length=4; length<argc; length++) {
X    if (strcmp(argv[length],"in")==0)
X      doflags |= DOSTDIN;
X    else if (strcmp(argv[length],"out")==0)
X      doflags |= DOSTDOUT;
X    else if (strcmp(argv[length],"err")==0)
X      doflags |= DOSTDERR;
X    else if (strcmp(argv[length],"unix")==0)
X      doflags |= DOUNIX;
X    else if (strcmp(argv[length],"localport")==0) {
X      if (length+1<argc)
X    localport=argv[++length];
X      else
X    fprintf(stderr,"%s: localport requires port name or number after.\n",
X        programname);
X    } else
X      fprintf(stderr,"%s: Bogus extra command line flag \"%s\".\n",
X          programname,argv[length]);
X  }
X
X  if ( ! (doflags&(DOSTDIN|DOSTDERR|DOSTDOUT)) ) {
X    fprintf(stderr,"%s: Need at least one {in|out|err}.\n",programname);
X    exit(1);
X  }
X
X  rval = setup_socket(argv[1],argv[2]);
X
X  if (doflags&DOUNIX && localport!=NULL)
X    unlink(localport);
X
X#if 0
X  if (!fork()) {
X    int sparefd;
X    char *s;
X
X    sparefd = dup(fileno(stderr));
X    ioctl(sparefd,FIOCLEX,NULL);
X
X    if (!(doflags & DOSTDIN))
X      dup2(rval,fileno(stdin));
X    if (!(doflags & DOSTDOUT))
X      dup2(rval,fileno(stdin));
X    if (!(doflags & DOSTDERR))
X      dup2(rval,fileno(stderr));
X    close(rval);
X
X    execl("/bin/cat",NULL);
X    s ="exec failed\n";
X    write(sparefd,s,strlen(s));
X    exit(1);
X  }
X#endif
X  {
X    int sparefd;
X    char *s;
X
X    sparefd = dup(fileno(stderr));
X    ioctl(sparefd,FIOCLEX,NULL);
X
X    if (doflags & DOSTDIN)
X      dup2(rval,fileno(stdin));
X    if (doflags & DOSTDOUT)
X      dup2(rval,fileno(stdout));
X    if (doflags & DOSTDERR)
X      dup2(rval,fileno(stderr));
X    close(rval);
X
X    execl("/bin/csh","csh","-c",argv[3],NULL);
X    s ="exec failed\n";
X    write(sparefd,s,strlen(s));
X    exit(1);
X  }
X}
END_OF_FILE
if test 4891 -ne `wc -c <'hose.c'`; then
    echo shar: \"'hose.c'\" unpacked with wrong size!
fi
# end of 'hose.c'
fi
if test -f 'portname.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'portname.c'\"
else
echo shar: Extracting \"'portname.c'\" \(2973 characters\)
sed "s/^X//" >'portname.c' <<'END_OF_FILE'
X/*
X
X    portname.c, part of
X    faucet and hose: network pipe utilities
X    Copyright (C) 1992 Robert Forsman
X
X    This program is free software; you can redistribute it and/or modify
X    it under the terms of the GNU General Public License as published by
X    the Free Software Foundation; either version 2 of the License, or
X    (at your option) any later version.
X
X    This program is distributed in the hope that it will be useful,
X    but WITHOUT ANY WARRANTY; without even the implied warranty of
X    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X    GNU General Public License for more details.
X
X    You should have received a copy of the GNU General Public License
X    along with this program; if not, write to the Free Software
X    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X
X    */
X
X#include    <stdio.h>
X#include    <fcntl.h>
X#include    <errno.h>
X#include    <sys/socket.h>
X#include    <sys/un.h>
X#include    <netdb.h>
X#include    <netinet/in.h>
X
int name_to_inet_port(portname)
char *portname;
X/* This procedure converts a character string to a port number.  It looks
X   up the service by name and if there is none, then it converts the string
X   to a number with sscanf */
X{
X  struct servent    *p;
X
X  if (portname==NULL)
X    return 0;
X
X  p = getservbyname(portname,"tcp");
X  if (p!=NULL)
X    {
X      return p->s_port;
X    }
X  else
X    {
X      int    port;
X      if (sscanf(portname,"%i",&port)!=1)
X    {
X      return 0;
X    }
X      else
X    return htons(port);
X    }
X}
X
int
convert_hostname(name, addr)
X     char    *name;
X     struct in_addr    *addr;
X{
X  struct hostent    *hp;
X  int        len;
X
X  hp = gethostbyname(name);
X  if (hp != NULL)
X    bcopy(hp->h_addr,addr,hp->h_length);
X  else
X    {
X      int    count;
X      unsigned int    a1,a2,a3,a4;
X      count = sscanf(name,"%i.%i.%i.%i%n", &a1, &a2, &a3, &a4, &len);
X      if (4!=count || 0!=name[len] )
X    return 0;
X      addr->S_un.S_un_b.s_b1 = a1;
X      addr->S_un.S_un_b.s_b2 = a2;
X      addr->S_un.S_un_b.s_b3 = a3;
X      addr->S_un.S_un_b.s_b4 = a4;
X    }
X  return 1;
X}
X
X
int
bindlocal(fd, name, domain)
X     int    fd, domain;
X     char    *name;
X{
X  struct sockaddr    laddr;
X  int    countdown;
X  int    rval;
X
X  if (domain==AF_INET)
X    {
X      struct sockaddr_in    *srv = (struct sockaddr_in*)&laddr;
X
X      srv->sin_family = AF_INET;
X      srv->sin_addr.s_addr = INADDR_ANY;
X
X      srv->sin_port = name_to_inet_port(name);
X
X      if (srv->sin_port==0)
X    {
X      fprintf(stderr, "port %s unknown\n", name);
X      return 0;
X    }
X    }
X  else
X    {
X      struct sockaddr_un    *srv = (struct sockaddr_un *)&laddr;
X
X      srv->sun_family = AF_UNIX;
X      strcpy(srv->sun_path, name);
X    }
X
X  countdown= (domain==AF_UNIX)?1:10;
X  do {
X    rval = bind(fd, &laddr, sizeof(laddr));
X    if (rval)
X      if (errno==EADDRINUSE && --countdown>0)
X    {
X      fprintf(stderr,"Address %s in use, sleeping 10.\n",
X          name);
X      sleep (10);
X      fprintf(stderr,"Trying again . . .\n");
X    }
X      else
X    return 0;
X  } while (rval);
X
X  return 1;
X}
END_OF_FILE
if test 2973 -ne `wc -c <'portname.c'`; then
    echo shar: \"'portname.c'\" unpacked with wrong size!
fi
# end of 'portname.c'
fi
echo shar: End of archive 1 \(of 1\).
cp /dev/null ark1isdone
MISSING=""
for I in 1 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have the archive.
    rm -f ark[1-9]isdone
else
    echo You still need to unpack the following archives:
    echo "        " ${MISSING}
fi
##  End of shell archive.
exit 0