193 lines
6 KiB
Perl
193 lines
6 KiB
Perl
#!/usr/bin/perl
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# Note : you may have to edit path to Perl above, according to your system setup
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#
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# modified for ssh+chroot setup by Anton Berezin <tobez@plab.ku.dk> #
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# Synopsys : scvs -d :pserver:cvs@www.stlport.com/stlport <cvs command> # (this is for read-only anonymous access via "cvs" user)
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# Please use your cvs login name if you have one instead of "cvs" above, to be able to commit your changes
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#
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#--
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# tunable variables
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#--
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# Set this if it does not work otherwise
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# $tune_cvs_server_name = "cvs.stlport.com";
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# where cvs program is located on the client system
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$tune_local_cvs_cmd = "cvs";
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# remote pserver port to use
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# for explanation, see
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# http://www.prima.eu.org/tobez/cvs-howto.html#inetd
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$tune_remote_cvs_port = 2410;
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# local pserver port; you probably don't want to change this
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$tune_local_cvs_port = 2401;
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# ssh command to use; the default is good for UNIX clients
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$tune_ssh_cmd = "ssh";
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# the user on the server side cvs runs as
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$tune_ssh_user = "cvs";
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#--
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# end of tunable variables
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# there is no need to modify anything below
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#--
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#############################################################################
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# CVS settings
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$CVS_CMD=$tune_local_cvs_cmd;
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$CVS_PORT=$tune_remote_cvs_port;
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$CVS_LOCAL_PORT=$tune_local_cvs_port;
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# the values below will be needed only if the repository is specified via the
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# command line or the CVSROOT environment variable, and in those cases they
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# will be extracted from there. However, for funny results you can uncomment
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# these two lines.
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# $CVS_HOST="www.stlport.com";
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# $CVS_USER="cvs";
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#############################################################################
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# SSH settings
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# ssh2 does not seem to work with our -L port:host:hostport argument, so make
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# sure we will use ssh1.
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$SSH_CMD=$tune_ssh_cmd;
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# This should be the user on whose behalf the tunneling is made. It is
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# typically a user that cannot do any harm, has no password and uses a program
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# like nologin (but one that will wait) as a shell.
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$SSH_USER=$tune_ssh_user;
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# This value should also automagically be set from the repository name.
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# However, if that host is not running sshd, you may want to tunnel through
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# another host and modify and uncomment the line below.
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# $SSH_HOST=$CVS_HOST
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# This value is used if the repository cannot be determined from the
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# commandline or the CVSROOT variable. Modify this for your local situation.
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$SSH_DEFAULT_HOST=$tune_cvs_server_name;
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# Port at which the sshd on the remote server runs. Default is 22.
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# $SSH_PORT=22;
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# This should be left unmodified, as it makes no sense changing this. Unless
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# some future version (or perhaps even the current version) of cvs allow you
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# to specify the remote repository's port.
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$SSH_LOCAL_PORT=$CVS_LOCAL_PORT;
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#############################################################################
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# & parse_repository ({{rep}})
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# . extracts the method, user, host, port and directory from {{rep}}.
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# . There are four possibilities:
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# - /path/to/repository
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# - :method:/path/to/repository
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# - :user@hostname:/path/to/repository
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# - :method:user@hostname:/path/to/repository
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# non-standard repositories. Has only been tested for :pserver: method.
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#
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sub parse_repository
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{
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my $rep = $_[0];
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my ($dir,$user,$host,$method);
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# determine the directory
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$rep =~ s/:(\/.*)$// && do { $dir=$1; };
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if (not $dir)
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{ $rep =~ s/(\/.*)$// && do {$dir = $1; }; }
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# determine the hostname and the username
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$rep =~ s/:([^:]*)@(.*)$// && do { $user = $1; $host = $2; };
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if (not $host)
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{ $rep =~ s/:([^:]+)$// && do { $host = $1; }; }
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# all that is left now is the method
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$rep =~ s/^:([^:]*)// && do { $method = $1; };
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# if there is still anything left, we have an error, warn the user
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if ($rep)
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{ print STDERR "Warning: repository parsed wrong ('$rep' ignored).\n"; }
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# print STDERR "DEBUG: dir=$dir, user=$user, host=$host, method=$method\n";
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return ($method, $user, $host, $dir);
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}
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#############################################################################
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# main
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# should be changed to a general cmdline parsing routine.
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# get the repository's name from the commandline or the CVSROOT environment
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# variable.
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if ($ARGV[0] eq "-d")
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{
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$rep="$ARGV[1]";
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shift; shift;
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}
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else
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{
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$rep = $ENV{'CVSROOT'};
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}
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# print STDERR "DEBUG: rep = $rep\n";
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# parse the repository
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($method, $user, $host, $dir) = parse_repository $rep;
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# print "met: $method, user: $user, host: $host, dir: $dir\n";
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# construct the local fake cvs server name.
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if ($method) { $cvs_serv = ":$method:"; }
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if ($user) { $cvs_serv .= "$user\@"; }
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if ($rep) { $cvs_serv .= "localhost:"; }
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if ($dir) { $cvs_serv .= $dir; }
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# print STDERR "DEBUG: cvs_serv = $cvs_serv\n";
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# construct the tunneling command
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$SSH_HOST |= $host;
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# print STDERR "DEBUG: SSH_HOST=$SSH_HOST\n";
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$SSH_HOST |= $SSH_DEFAULT_HOST;
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# print STDERR "DEBUG: SSH_HOST=$SSH_HOST\n";
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if ($SSH_USER)
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{ $ssh_serv="$SSH_USER\@$SSH_HOST"; }
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else
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{ $ssh_serv="$SSH_HOST"; }
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# print "ssh_serv: $ssh_serv\n";
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$tunnel_cmd = "$SSH_CMD $ssh_serv -x -f"
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. ( ($SSH_PORT) ? " -p $(SSH_PORT)" : "" )
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. " -L $SSH_LOCAL_PORT:$SSH_HOST:$CVS_PORT open";
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# print STDERR "DEBUG: tunnel_cmd: $tunnel_cmd\n";
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# execute the tunneling, and read the response from the server
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open (TUNNELSH,"$tunnel_cmd |") or die "Could not execute $tunnel_cmd!";
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chomp ($magicword = <TUNNELSH>);
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# print STDERR "DEBUG: magicword = $magicword!\n";
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# Now we can call system to execute the cvs command.
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# print STDERR "Doing: $CVS_CMD|", ( ($cvs_serv) ? ('-d |', "$cvs_serv|") : ( ) ) , "@ARGV", "|\n";
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$exitcode =
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system "$CVS_CMD", ( ($cvs_serv) ? ('-d', $cvs_serv) : () ) , @ARGV;
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if ($exitcode) { print STDERR "Could not execute CVS command!\n"; }
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# close the tunnel
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#print STDERR "DEBUG: ", ( "$SSH_CMD $ssh_serv -q -x -f"
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# . ( ($SSH_PORT) ? " -p $SSH_PORT" : "" )
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# . " $magicword" );
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# print STDERR "before close\n";
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system ( "$SSH_CMD $ssh_serv -q -x -f"
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. ( ($SSH_PORT) ? " -p $SSH_PORT" : "" )
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. " $magicword" );
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# print STDERR "right after close\n";
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