+#!/usr/bin/perl
#
-# setup-openssh.pl:
-# Adapts the installed gsi-ssh environment to the current machine,
-# performing actions that originally occurred during the package's
-# 'make install' phase.
+# setup-openssh.pl
#
-# Large parts adapted from 'fixpath', a tool found in openssh-3.0.2p1.
+# Adapts the installed gsi-openssh environment to the current machine,
+# performing actions that originally occurred during the package's
+# 'make install' phase.
#
# Send comments/fixes/suggestions to:
# Chase Phillips <cphillip@ncsa.uiuc.edu>
#
+#
+# Get user's GPT_LOCATION since we may be installing this using a new(er)
+# version of GPT.
+#
+
+$gptpath = $ENV{GPT_LOCATION};
+
+#
+# And the old standby..
+#
+
$gpath = $ENV{GLOBUS_LOCATION};
if (!defined($gpath))
{
- die "GLOBUS_LOCATION needs to be set before running this script"
+ exitDie("ERROR: GLOBUS_LOCATION needs to be set before running this script!\n");
}
+#
+# Include standard modules
+#
+
+use Getopt::Long;
+use Cwd;
+use Cwd 'abs_path';
+
#
# i'm including this because other perl scripts in the gpt setup directories
# do so
#
-@INC = (@INC, "$gpath/lib/perl");
+if (defined($gptpath))
+{
+ @INC = (@INC, "$gptpath/lib/perl", "$gpath/lib/perl");
+}
+else
+{
+ @INC = (@INC, "$gpath/lib/perl");
+}
require Grid::GPT::Setup;
+#
+# script-centred variable initialization
+#
+
my $globusdir = $gpath;
-my $setupdir = "$globusdir/setup/globus";
my $myname = "setup-openssh.pl";
-print "$myname: Configuring package 'gsi_openssh'...\n";
-
#
# Set up path prefixes for use in the path translations
#
$prefix = ${globusdir};
$exec_prefix = "${prefix}";
-$bindir = "${exec_prefix}/bin";
+$bindir = "${exec_prefix}/bin/ssh.d";
$sbindir = "${exec_prefix}/sbin";
-$mandir = "${prefix}/man";
-$mansubdir = "man";
-$libexecdir = "${exec_prefix}/libexec";
-$sysconfdir = "${prefix}/etc";
-$piddir = "/var/run";
-$xauth_path = "/usr/bin/X11/xauth";
-
-sub fixpaths
-{
- #
- # Set up path translations for the installation files
- #
-
- %def = (
- "/etc/ssh_config" => "${sysconfdir}/ssh_config",
- "/etc/ssh_known_hosts" => "${sysconfdir}/ssh_known_hosts",
- "/etc/sshd_config" => "${sysconfdir}/sshd_config",
- "/usr/libexec" => "${libexecdir}",
- "/etc/shosts.equiv" => "${sysconfdir}/shosts.equiv",
- "/etc/ssh_host_key" => "${sysconfdir}/ssh_host_key",
- "/etc/ssh_host_dsa_key" => "${sysconfdir}/ssh_host_dsa_key",
- "/etc/ssh_host_rsa_key" => "${sysconfdir}/ssh_host_rsa_key",
- "/var/run/sshd.pid" => "${piddir}/sshd.pid",
- "/etc/moduli" => "${sysconfdir}/moduli",
- "/etc/sshrc" => "${sysconfdir}/sshrc",
- "/usr/X11R6/bin/xauth" => "${xauth_path}",
- "/usr/bin:/bin:/usr/sbin:/sbin" => "/usr/bin:/bin:/usr/sbin:/sbin:${bindir}",
- "/path/to/scp.real" => "${bindir}/scp.real",
- "/path/to/ssh" => "${bindir}/ssh",
- "/path/to/sftp.real" => "${bindir}/sftp.real",
- "/path/to/sshd.real" => "${sbindir}/sshd.real",
- "/path/to/ssh_config" => "${sysconfdir}/ssh_config",
- "/path/to/sshd_config" => "${sysconfdir}/sshd_config",
- );
-
- #
- # Files on which to perform path translations
- #
-
- @files = (
- "${bindir}/scp",
- "${bindir}/sftp",
- "${sbindir}/sshd",
- "${sysconfdir}/ssh_config",
- "${sysconfdir}/sshd_config",
- "${sysconfdir}/moduli",
- "${mandir}/${mansubdir}1/scp.1",
- "${mandir}/${mansubdir}1/ssh-add.1",
- "${mandir}/${mansubdir}1/ssh-agent.1",
- "${mandir}/${mansubdir}1/ssh-keygen.1",
- "${mandir}/${mansubdir}1/ssh-keyscan.1",
- "${mandir}/${mansubdir}1/ssh.1",
- "${mandir}/${mansubdir}8/sshd.8",
- "${mandir}/${mansubdir}8/sftp-server.8",
- "${mandir}/${mansubdir}1/sftp.1",
- );
-
- print "Translating strings in config/man files...\n";
- for $f (@files)
- {
- $f =~ /(.*\/)*(.*)$/;
+$sysconfdir = "$prefix/etc/ssh";
+$localsshdir = "/etc/ssh";
+$setupdir = "$prefix/setup/gsi_openssh_setup";
- #
- # we really should create a random filename and make sure that it
- # doesn't already exist (based off current time_t or something)
- #
+#
+# standard key types and their root file name mappings
+#
- $g = "$f.tmp";
+my $keyfiles = {
+ "dsa" => "ssh_host_dsa_key",
+ "rsa" => "ssh_host_rsa_key",
+ "rsa1" => "ssh_host_key",
+ };
- #
- # Grab the current mode/uid/gid for use later
- #
+#
+# argument specification. we offload some processing work from later functions
+# to verify correct args by using anon subs in various places.
+#
+
+my($prompt, $force, $verbose);
+
+$prompt = 1;
+$verbose = 0;
+
+GetOptions(
+ 'prompt!' => \$prompt,
+ 'force' => \$force,
+ 'verbose' => \$verbose,
+ ) or pod2usage(2);
+
+#
+# miscellaneous initialization functions
+#
+
+setPrivilegeSeparation(0);
+
+#
+# main execution. This should find its way into a subroutine at some future
+# point.
+#
+
+debug0("Configuring gsi_openssh\n");
+debug0("------------------------------------------------------------\n");
+debug0("Executing...\n");
+
+makeConfDir();
+copyPRNGFile();
+$keyhash = determineKeys();
+runKeyGen($keyhash->{gen});
+linkKeyFiles($keyhash->{link});
+copyConfigFiles();
+
+my $metadata = new Grid::GPT::Setup(package_name => "gsi_openssh_setup");
+
+$metadata->finish();
+
+debug0("\n");
+debug0("Notes:\n\n");
+
+if ( getPrivilegeSeparation() )
+{
+ debug0(" o Privilege separation is on.\n");
+}
+elsif ( !getPrivilegeSeparation() )
+{
+ debug0(" o Privilege separation is off.\n");
+}
+
+debug0(" o GSI-OpenSSH website is <http://grid.ncsa.uiuc.edu/ssh/>.\n");
+debug0("------------------------------------------------------------\n");
+debug0("Finished configuring gsi_openssh.\n");
+
+exit;
+
+#
+# subroutines
+#
+
+### initPRNGHash( )
+#
+# initialize the PRNG pathname hash
+#
+
+sub initPRNGHash( )
+{
+ #
+ # standard prng to executable conversion names
+ #
+
+ addPRNGCommand("\@PROG_LS\@", "ls");
+ addPRNGCommand("\@PROG_NETSTAT\@", "netstat");
+ addPRNGCommand("\@PROG_ARP\@", "arp");
+ addPRNGCommand("\@PROG_IFCONFIG\@", "ifconfig");
+ addPRNGCommand("\@PROG_PS\@", "ps");
+ addPRNGCommand("\@PROG_JSTAT\@", "jstat");
+ addPRNGCommand("\@PROG_W\@", "w");
+ addPRNGCommand("\@PROG_WHO\@", "who");
+ addPRNGCommand("\@PROG_LAST\@", "last");
+ addPRNGCommand("\@PROG_LASTLOG\@", "lastlog");
+ addPRNGCommand("\@PROG_DF\@", "df");
+ addPRNGCommand("\@PROG_SAR\@", "sar");
+ addPRNGCommand("\@PROG_VMSTAT\@", "vmstat");
+ addPRNGCommand("\@PROG_UPTIME\@", "uptime");
+ addPRNGCommand("\@PROG_IPCS\@", "ipcs");
+ addPRNGCommand("\@PROG_TAIL\@", "tail");
+
+ debug1("Determining paths for PRNG commands...\n");
+
+ $paths = determinePRNGPaths();
+
+ return;
+}
+
+### getDirectoryPaths( )
+#
+# return an array ref containing all of the directories in which we should search
+# for our listing of executable names.
+#
+
+sub getDirectoryPaths( )
+{
+ #
+ # read in the PATH environmental variable and prepend a set of 'safe'
+ # directories from which to test PRNG commands.
+ #
+
+ $path = $ENV{PATH};
+ $path = "/bin:/usr/bin:/sbin:/usr/sbin:/etc:" . $path;
+ @dirs = split(/:/, $path);
+
+ #
+ # sanitize each directory listed in the array.
+ #
+
+ @dirs = map {
+ $tmp = $_;
+ $tmp =~ s:/+:/:g;
+ $tmp =~ s:^\s+|\s+$::g;
+ $tmp;
+ } @dirs;
+
+ return \@dirs;
+}
+
+### addPRNGCommand( $prng_name, $exec_name )
+#
+# given a PRNG name and a corresponding executable name, add it to our list of
+# PRNG commands for which to find on the system.
+#
+
+sub addPRNGCommand
+{
+ my($prng_name, $exec_name) = @_;
+
+ prngAddNode($prng_name, $exec_name);
+}
+
+### copyPRNGFile( )
+#
+# read in ssh_prng_cmds.in, translate the program listings to the paths we have
+# found on the local system, and then write the output to ssh_prng_cmds.
+#
+
+sub copyPRNGFile
+{
+ my($fileInput, $fileOutput);
+ my($mode, $uid, $gid);
+ my($data);
+
+ if ( isPresent("$sysconfdir/ssh_prng_cmds") && !isForced() )
+ {
+ debug1("ssh_prng_cmds found and not forced. Not installing ssh_prng_cmds...\n");
+ return;
+ }
+
+ initPRNGHash();
+
+ debug1("Fixing paths in ssh_prng_cmds...\n");
+
+ $fileInput = "$setupdir/ssh_prng_cmds.in";
+ $fileOutput = "$sysconfdir/ssh_prng_cmds";
+
+ #
+ # verify that we are prepared to work with $fileInput
+ #
+
+ if ( !isReadable($fileInput) )
+ {
+ debug1("Cannot read $fileInput... skipping.\n");
+ return;
+ }
+
+ #
+ # verify that we are prepared to work with $fileOuput
+ #
+
+ if ( !prepareFileWrite($fileOutput) )
+ {
+ return;
+ }
+
+ #
+ # Grab the current mode/uid/gid for use later
+ #
+
+ $mode = (stat($fileInput))[2];
+ $uid = (stat($fileInput))[4];
+ $gid = (stat($fileInput))[5];
+
+ #
+ # Open the files for reading and writing, and loop over the input's contents
+ #
+
+ $data = readFile($fileInput);
+ for my $k (keys %$prngcmds)
+ {
+ $sub = prngGetExecPath($k);
+ $data =~ s:$k:$sub:g;
+ }
+ writeFile($fileOutput, $data);
+
+ #
+ # An attempt to revert the new file back to the original file's
+ # mode/uid/gid
+ #
+
+ chmod($mode, $fileOutput);
+ chown($uid, $gid, $fileOutput);
+
+ return 0;
+}
+
+### determinePRNGPaths( )
+#
+# for every entry in the PRNG hash, seek out and find the path for the
+# corresponding executable name.
+#
+
+sub determinePRNGPaths
+{
+ my(@paths, @dirs);
+ my($exec_name, $exec_path);
- $mode = (stat($f))[2];
- $uid = (stat($f))[4];
- $gid = (stat($f))[5];
+ $dirs = getDirectoryPaths();
- $result = system("mv $f $g");
- if ($result != 0)
+ for my $k (keys %$prngcmds)
+ {
+ $exec_name = prngGetExecName($k);
+ $exec_path = findExecutable($exec_name, $dirs);
+ prngSetExecPath($k, $exec_path);
+ }
+
+ return;
+}
+
+### prngAddNode( $prng_name, $exec_name )
+#
+# add a new node to the PRNG hash
+#
+
+sub prngAddNode
+{
+ my($prng_name, $exec_name) = @_;
+ my($node);
+
+ if (!defined($prngcmds))
+ {
+ $prngcmds = {};
+ }
+
+ $node = {};
+ $node->{prng} = $prng_name;
+ $node->{exec} = $exec_name;
+
+ $prngcmds->{$prng_name} = $node;
+}
+
+### prngGetExecName( $key )
+#
+# get the executable name from the prng commands hash named by $key
+#
+
+sub prngGetExecName
+{
+ my($key) = @_;
+
+ return $prngcmds->{$key}->{exec};
+}
+
+### prngGetExecPath( $key )
+#
+# get the executable path from the prng commands hash named by $key
+#
+
+sub prngGetExecPath
+{
+ my($key) = @_;
+
+ return $prngcmds->{$key}->{exec_path};
+}
+
+### prngGetNode( $key )
+#
+# return a reference to the node named by $key
+#
+
+sub prngGetNode
+{
+ my($key) = @_;
+
+ return ${$prngcmds}{$key};
+}
+
+### prngSetExecPath( $key, $path )
+#
+# given a key, set the executable path in that node to $path
+#
+
+sub prngSetExecPath
+{
+ my($key, $path) = @_;
+
+ $prngcmds->{$key}->{exec_path} = $path;
+}
+
+### findExecutable( $exec_name, $dirs )
+#
+# given an executable name, test each possible path in $dirs to see if such
+# an executable exists.
+#
+
+sub findExecutable
+{
+ my($exec_name, $dirs) = @_;
+
+ for my $d (@$dirs)
+ {
+ $test = "$d/$exec_name";
+
+ if ( isExecutable($test) )
{
- die "Failed to copy $f to $g!\n";
+ return $test;
}
+ }
+
+ return "undef";
+}
+
+### linkKeyFiles( $linklist )
+#
+# given an array of keys to link, link both the key and its public variant into
+# the gsi-openssh configuration directory.
+#
+
+sub linkKeyFiles
+{
+ my($linklist) = @_;
+ my($regex, $basename);
- open(IN, "<$g") || die ("$0: input file $g missing!\n");
- open(OUT, ">$f") || die ("$0: unable to open output file $f!\n");
+ if (@$linklist)
+ {
+ debug1("Linking ssh host keys...\n");
- while (<IN>)
+ for my $f (@$linklist)
{
- for $s (keys(%def))
+ $f =~ s:/+:/:g;
+
+ if (length($f) > 0)
{
- s#$s#$def{$s}#;
- } # for $s
- print OUT "$_";
- } # while <IN>
+ $keyfile = "$f";
+ $pubkeyfile = "$f.pub";
+
+ linkFile("$localsshdir/$keyfile", "$sysconfdir/$keyfile");
+ linkFile("$localsshdir/$pubkeyfile", "$sysconfdir/$pubkeyfile");
+ }
+ }
+ }
+}
+
+### isForced( )
+#
+# return true if the user passed in the force flag. return false otherwise.
+#
- close(OUT);
- close(IN);
+sub isForced
+{
+ if ( defined($force) && $force )
+ {
+ return 1;
+ }
+ else
+ {
+ return 0;
+ }
+}
+
+### isReadable( $file )
+#
+# given a file, return true if that file both exists and is readable by the
+# effective user id. return false otherwise.
+#
+
+sub isReadable
+{
+ my($file) = @_;
+
+ if ( ( -e $file ) && ( -r $file ) )
+ {
+ return 1;
+ }
+ else
+ {
+ return 0;
+ }
+}
+
+### isExecutable( $file )
+#
+# return true if $file is executable. return false otherwise.
+#
+
+sub isExecutable
+{
+ my($file) = @_;
+
+ if ( -x $file )
+ {
+ return 1;
+ }
+ else
+ {
+ return 0;
+ }
+}
+
+### isWritable( $file )
+#
+# given a file, return true if that file does not exist or is writable by the
+# effective user id. return false otherwise.
+#
+
+sub isWritable
+{
+ my($file) = @_;
+
+ if ( ( ! -e $file ) || ( -w $file ) )
+ {
+ return 1;
+ }
+ else
+ {
+ return 0;
+ }
+}
+
+### isPresent( $file )
+#
+# given a file, return true if that file exists. return false otherwise.
+#
+
+sub isPresent
+{
+ my($file) = @_;
+
+ if ( -e $file )
+ {
+ return 1;
+ }
+ else
+ {
+ return 0;
+ }
+}
- $result = system("rm $g");
- if ($result != 0)
+### makeConfDir( )
+#
+# make the gsi-openssh configuration directory if it doesn't already exist.
+#
+
+sub makeConfDir
+{
+ if ( isPresent($sysconfdir) )
+ {
+ if ( -d $sysconfdir )
{
- die "Failed to remove $g\n";
+ return;
}
- #
- # An attempt to revert the new file back to the original file's
- # mode/uid/gid
- #
+ debug1("${sysconfdir} already exists and is not a directory!\n");
+ exit;
+ }
- chmod($mode, $f);
- chown($uid, $gid, $f);
- } # for $f
+ debug1("Could not find ${sysconfdir} directory... creating.\n");
+ action("mkdir -p $sysconfdir");
- return 0;
+ return;
}
-fixpaths();
+### determineKeys( )
+#
+# based on a set of key types, triage them to determine if for each key type, that
+# key type should be copied from the main ssh configuration directory, or if it
+# should be generated using ssh-keygen.
+#
-print "---------------------------------------------------------------------\n";
-print "If you would also like to run the sshd binary that came with this\n";
-print "package and you do not have host keys located in /etc, run (as root):\n";
-print "\n";
-print " $setupdir/setup-openssh-keys\n";
-print "\n";
-print "This script creates machine-specific host keys in /etc that are\n";
-print "required by sshd.\n";
-print "---------------------------------------------------------------------\n";
+sub determineKeys
+{
+ my($keyhash, $keylist);
+ my($count);
-my $metadata = new Grid::GPT::Setup(package_name => "gsi_openssh_setup");
+ #
+ # initialize our variables
+ #
-$metadata->finish();
+ $count = 0;
+
+ $keyhash = {};
+ $keyhash->{gen} = []; # a list of keytypes to generate
+ $keyhash->{link} = []; # a list of files to link
-print "$myname: Finished configuring package 'gsi_openssh'.\n";
+ $genlist = $keyhash->{gen};
+ $linklist = $keyhash->{link};
+
+ #
+ # loop over our keytypes and determine what we need to do for each of them
+ #
+
+ for my $keytype (keys %$keyfiles)
+ {
+ $basekeyfile = $keyfiles->{$keytype};
+
+ #
+ # if the key's are already present, we don't need to bother with this rigamarole
+ #
+
+ $gkeyfile = "$sysconfdir/$basekeyfile";
+ $gpubkeyfile = "$sysconfdir/$basekeyfile.pub";
+
+ if ( isPresent($gkeyfile) && isPresent($gpubkeyfile) )
+ {
+ if ( isForced() )
+ {
+ if ( isWritable("$sysconfdir/$basekeyfile") && isWritable("$sysconfdir/$basekeyfile.pub") )
+ {
+ action("rm $sysconfdir/$basekeyfile");
+ action("rm $sysconfdir/$basekeyfile.pub");
+ }
+ else
+ {
+ next;
+ }
+ }
+ }
+
+ #
+ # if we can find a copy of the keys in /etc/ssh, we'll link them to the user's
+ # globus location
+ #
+
+ $mainkeyfile = "$localsshdir/$basekeyfile";
+ $mainpubkeyfile = "$localsshdir/$basekeyfile.pub";
+
+ if ( isPresent($mainkeyfile) && isPresent($mainpubkeyfile) )
+ {
+ push(@$linklist, $basekeyfile);
+ $count++;
+ next;
+ }
+
+ #
+ # otherwise, we need to generate the key
+ #
+
+ push(@$genlist, $keytype);
+ $count++;
+ }
+
+ return $keyhash;
+}
+
+### runKeyGen( $gen_keys )
+#
+# given a set of key types, generate private and public keys for that key type and
+# place them in the gsi-openssh configuration directory.
+#
+
+sub runKeyGen
+{
+ my($gen_keys) = @_;
+ my $keygen = "$bindir/ssh-keygen";
+
+ if (@$gen_keys && -x $keygen)
+ {
+ debug1("Generating ssh host keys...\n");
+
+ for my $k (@$gen_keys)
+ {
+ $keyfile = $keyfiles->{$k};
+
+ if ( !isPresent("$sysconfdir/$keyfile") )
+ {
+ action("$bindir/ssh-keygen -t $k -f $sysconfdir/$keyfile -N \"\"");
+ }
+ }
+ }
+
+ return 0;
+}
+
+### copySSHDConfigFile( )
+#
+# this subroutine 'edits' the paths in sshd_config to suit them to the current environment
+# in which the setup script is being run.
+#
+
+sub copySSHDConfigFile
+{
+ my($fileInput, $fileOutput);
+ my($mode, $uid, $gid);
+ my($line, $newline);
+ my($privsep_enabled);
+
+ debug1("Fixing paths in sshd_config...\n");
+
+ $fileInput = "$setupdir/sshd_config.in";
+ $fileOutput = "$sysconfdir/sshd_config";
+
+ #
+ # verify that we are prepared to work with $fileInput
+ #
+
+ if ( !isReadable($fileInput) )
+ {
+ debug1("Cannot read $fileInput... skipping.\n");
+ return;
+ }
+
+ #
+ # verify that we are prepared to work with $fileOuput
+ #
+
+ if ( !prepareFileWrite($fileOutput) )
+ {
+ return;
+ }
+
+ #
+ # check to see whether we should enable privilege separation
+ #
+
+ if ( userExists("sshd") && ( -d "/var/empty" ) && ( getOwnerID("/var/empty") eq 0 ) )
+ {
+ setPrivilegeSeparation(1);
+ }
+ else
+ {
+ setPrivilegeSeparation(0);
+ }
+
+ if ( getPrivilegeSeparation() )
+ {
+ $privsep_enabled = "yes";
+ }
+ else
+ {
+ $privsep_enabled = "no";
+ }
+
+ #
+ # Grab the current mode/uid/gid for use later
+ #
+
+ $mode = (stat($fileInput))[2];
+ $uid = (stat($fileInput))[4];
+ $gid = (stat($fileInput))[5];
+
+ #
+ # Open the files for reading and writing, and loop over the input's contents
+ #
+
+ $data = readFile($fileInput);
+
+ # #
+ # # alter the PidFile config
+ # #
+ #
+ # $text = "PidFile\t$gpath/var/sshd.pid";
+ # $data =~ s:^[\s|#]*PidFile.*$:$text:gm;
+
+ #
+ # set the sftp directive
+ #
+
+ $text = "Subsystem\tsftp\t$gpath/libexec/sftp-server";
+ $data =~ s:^[\s|#]*Subsystem\s+sftp\s+.*$:$text:gm;
+
+ #
+ # set the privilege separation directive
+ #
+
+ $text = "UsePrivilegeSeparation\t${privsep_enabled}";
+ $data =~ s:^[\s|#]*UsePrivilegeSeparation.*$:$text:gm;
+
+ #
+ # dump the modified output to the config file
+ #
+
+ writeFile($fileOutput, $data);
+
+ #
+ # An attempt to revert the new file back to the original file's
+ # mode/uid/gid
+ #
+
+ chmod($mode, $fileOutput);
+ chown($uid, $gid, $fileOutput);
+
+ return 0;
+}
+
+### setPrivilegeSeparation( $value )
+#
+# set the privilege separation variable to $value
+#
+
+sub setPrivilegeSeparation
+{
+ my($value) = @_;
+
+ $privsep = $value;
+}
+
+### getPrivilegeSeparation( )
+#
+# return the value of the privilege separation variable
+#
+
+sub getPrivilegeSeparation
+{
+ return $privsep;
+}
+
+### prepareFileWrite( $file )
+#
+# test $file to prepare for writing to it.
+#
+
+sub prepareFileWrite
+{
+ my($file) = @_;
+
+ if ( isPresent($file) )
+ {
+ debug1("$file already exists... ");
+
+ if ( isForced() )
+ {
+ if ( isWritable($file) )
+ {
+ debug1("removing.\n");
+ action("rm $file");
+ return 1;
+ }
+ else
+ {
+ debug1("not writable -- skipping.\n");
+ return 0;
+ }
+ }
+ else
+ {
+ debug1("skipping.\n");
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+### copyConfigFiles( )
+#
+# subroutine that copies some extra config files to their proper location in
+# $GLOBUS_LOCATION/etc/ssh.
+#
+
+sub copyConfigFiles
+{
+ #
+ # copy the sshd_config file into the ssh configuration directory and alter
+ # the paths in the file.
+ #
+
+ copySSHDConfigFile();
+
+ #
+ # do straight copies of the ssh_config and moduli files.
+ #
+
+ debug1("Copying ssh_config and moduli to their proper location...\n");
+
+ copyFile("$setupdir/ssh_config", "$sysconfdir/ssh_config");
+ copyFile("$setupdir/moduli", "$sysconfdir/moduli");
+
+ #
+ # copy and alter the SXXsshd script.
+ #
+
+ copySXXScript("$setupdir/SXXsshd.in", "$sbindir/SXXsshd");
+}
+
+### linkFile( $src, $dest )
+#
+# create a symbolic link from $src to $dest.
+#
+
+sub linkFile
+{
+ my($src, $dest) = @_;
+
+ if ( !isPresent($src) )
+ {
+ debug1("$src is not readable... not creating $dest.\n");
+ return;
+ }
+
+ if ( !prepareFileWrite($dest) )
+ {
+ return;
+ }
+
+ action("ln -s $src $dest");
+}
+
+### copyFile( $src, $dest )
+#
+# copy the file pointed to by $src to the location specified by $dest. in the
+# process observe the rules regarding when the '-force' flag was passed to us.
+#
+
+sub copyFile
+{
+ my($src, $dest) = @_;
+
+ if ( !isReadable($src) )
+ {
+ debug1("$src is not readable... not creating $dest.\n");
+ return;
+ }
+
+ if ( !prepareFileWrite($dest) )
+ {
+ return;
+ }
+
+ action("cp $src $dest");
+}
+
+### copySXXScript( $in, $out )
+#
+# parse the input file, substituting in place the value of GLOBUS_LOCATION, and
+# write the result to the output file.
+#
+
+sub copySXXScript
+{
+ my($in, $out) = @_;
+ my($tmpgpath);
+
+ if ( !isReadable($in) )
+ {
+ debug1("$in is not readable... not creating $out.\n");
+ return;
+ }
+
+ if ( !prepareFileWrite($out) )
+ {
+ return;
+ }
+
+ #
+ # clean up any junk in the globus path variable
+ #
+
+ $tmpgpath = $gpath;
+ $tmpgpath =~ s:/+:/:g;
+ $tmpgpath =~ s:([^/]+)/$:\1:g;
+
+ #
+ # read in the script, substitute globus location, then write it back out
+ #
+
+ $data = readFile($in);
+ $data =~ s|\@GLOBUS_LOCATION\@|$tmpgpath|g;
+ writeFile($out, $data);
+ action("chmod 755 $out");
+}
+
+### readFile( $filename )
+#
+# reads and returns $filename's contents
+#
+
+sub readFile
+{
+ my($filename) = @_;
+ my($data);
+
+ open(IN, "$filename") || exitDie("ERROR: Can't open '$filename': $!\n");
+ $/ = undef;
+ $data = <IN>;
+ $/ = "\n";
+ close(IN);
+
+ return $data;
+}
+
+### writeFile( $filename, $fileinput )
+#
+# create the inputs to the ssl program at $filename, appending the common name to the
+# stream in the process
+#
+
+sub writeFile
+{
+ my($filename, $fileinput) = @_;
+
+ #
+ # test for a valid $filename
+ #
+
+ if ( !defined($filename) || (length($filename) lt 1) )
+ {
+ exitDie("ERROR: Filename is undefined!\n");
+ }
+
+ #
+ # verify that we are prepared to work with $filename
+ #
+
+ if ( !prepareFileWrite($filename) )
+ {
+ return;
+ }
+
+ #
+ # write the output to $filename
+ #
+
+ open(OUT, ">$filename");
+ print OUT "$fileinput";
+ close(OUT);
+}
+
+### debug1( $arg1, $arg2 )
+#
+# Print out a debugging message at level 1.
+#
+
+sub debug1
+{
+ debug(string => \@_, level => 1);
+}
+
+### debug0( $arg1, $arg2 )
+#
+# Print out a debugging message at level 0.
+#
+
+sub debug0
+{
+ debug(string => \@_, level => 0);
+}
+
+### debug( string => $string, level => $level )
+#
+# Print out debugging messages at various levels. Feel free to use debugN() directly
+# which in turn calls this subroutine.
+#
+
+sub debug
+{
+ my %args = @_;
+
+ if (!defined($args{'level'}))
+ {
+ $args{'level'} = 0;
+ }
+
+ if ($verbose >= $args{'level'})
+ {
+ printf(@{$args{'string'}});
+ }
+}
+
+### action( $command )
+#
+# run $command within a proper system() command.
+#
+
+sub action
+{
+ my($command) = @_;
+
+ debug1("$command\n");
+
+ my $result = system("$command >/dev/null 2>&1");
+
+ if (($result or $?) and $command !~ m!patch!)
+ {
+ exitDie("ERROR: Unable to execute $command: $!\n");
+ }
+}
+
+### exitDie( $error )
+#
+# a horribly named method meant to look like die but only exit, thereby not causing
+# gpt-postinstall to croak.
+#
+
+sub exitDie
+{
+ my($error) = @_;
+
+ print $error;
+ exit;
+}
+
+### query_boolean( $query_text, $default )
+#
+# query the user with a string, and expect a response. If the user hits
+# 'enter' instead of entering an input, then accept the default response.
+#
+
+sub query_boolean
+{
+ my($query_text, $default) = @_;
+ my($nondefault, $foo, $bar);
+
+ if ( !$prompt )
+ {
+ print "Prompt suppressed. Continuing...\n";
+ return "y";
+ }
+
+ #
+ # Set $nondefault to the boolean opposite of $default.
+ #
+
+ if ($default eq "n")
+ {
+ $nondefault = "y";
+ }
+ else
+ {
+ $nondefault = "n";
+ }
+
+ print "${query_text} ";
+ print "[$default] ";
+
+ $foo = <STDIN>;
+ ($bar) = split //, $foo;
+
+ if ( grep(/\s/, $bar) )
+ {
+ # this is debatable. all whitespace means 'default'
+
+ $bar = $default;
+ }
+ elsif ($bar eq '')
+ {
+ $bar = $default;
+ }
+ elsif ($bar ne $default)
+ {
+ # everything else means 'nondefault'.
+
+ $bar = $nondefault;
+ }
+ else
+ {
+ # extraneous step. to get here, $bar should be eq to $default anyway.
+
+ $bar = $default;
+ }
+
+ return $bar;
+}
+
+### absolutePath( $file )
+#
+# converts a given pathname into a canonical path using the abs_path function.
+#
+
+sub absolutePath
+{
+ my($file) = @_;
+ my $home = $ENV{'HOME'};
+ $file =~ s!~!$home!;
+ my $startd = cwd();
+ $file =~ s!^\./!$startd/!;
+ $file = "$startd/$file" if $file !~ m!^\s*/!;
+ $file = abs_path($file);
+ return $file;
+}
+
+### getOwnerID( $file )
+#
+# return the uid containing the owner ID of the given file.
+#
+
+sub getOwnerID
+{
+ my($file) = @_;
+ my($uid);
+
+ #
+ # call stat() to get the mode of the file
+ #
+
+ $uid = (stat($file))[4];
+
+ return $uid;
+}
+
+### getMode( $file )
+#
+# return a string containing the mode of the given file.
+#
+
+sub getMode
+{
+ my($file) = @_;
+ my($tempmode, $mode);
+
+ #
+ # call stat() to get the mode of the file
+ #
+
+ $tempmode = (stat($file))[2];
+ if (length($tempmode) < 1)
+ {
+ return "";
+ }
+
+ #
+ # call sprintf to format the mode into a UNIX-like string
+ #
+
+ $mode = sprintf("%04o", $tempmode & 07777);
+
+ return $mode;
+}
+
+### userExists( $username )
+#
+# given a username, return true if the user exists on the system. return false
+# otherwise.
+#
+
+sub userExists
+{
+ my($username) = @_;
+ my($uid);
+
+ #
+ # retrieve the userid of the user with the given username
+ #
+
+ $uid = getpwnam($username);
+
+ #
+ # return true if $uid is defined and has a length greater than 0
+ #
+
+ if ( defined($uid) and (length($uid) > 0) )
+ {
+ return 1;
+ }
+ else
+ {
+ return 0;
+ }
+}
andersk / gssapi-openssh.git / blobdiff