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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ#!/usr/bin/perl # # idrlogin.pl -- sample Perl 5 script to identify the network source of a # network (remote) login via rlogind, sshd, or telnetd # IMPORTANT DEFINITIONS # ===================== # # 1. Set the interpreter line of this script to the local path of the # Perl 5 executable. # Copyright 1997 Purdue Research Foundation, West Lafayette, Indiana # 47907. All rights reserved. # # Written by Victor A. Abell # # This software is not subject to any license of the American Telephone # and Telegraph Company or the Regents of the University of California. # # Permission is granted to anyone to use this software for any purpose on # any computer system, and to alter it and redistribute it freely, subject # to the following restrictions: # # 1. Neither the authors nor Purdue University are responsible for any # consequences of the use of this software. # # 2. The origin of this software must not be misrepresented, either by # explicit claim or by omission. Credit to the authors and Purdue # University must appear in documentation and sources. # # 3. Altered versions must be plainly marked as such, and must not be # misrepresented as being the original software. # # 4. This notice may not be removed or altered. # Initialize variables. $dev = $faddr = $tty = ""; # fd variables $pidst = 0; # process state $cmd = $login = $pgrp = $pid = $ppid = ""; # process var. # Set path to lsof. if (($LSOF = &isexec("../lsof")) eq "") { # Try .. first if (($LSOF = &isexec("lsof")) eq "") { # Then try . and $PATH print "can't execute $LSOF\n"; exit 1 } } # Open a pipe from lsof if (! -x "$LSOF") { die "Can't execute $LSOF\n"; } open (P, "$LSOF -R -FcDfLpPRn0|") || die "Can't pipe from $LSOF\n"; # Process the lsof output a line at a time while (

) { chop; @F = split('\0', $_, 999); if ($F[0] =~ /^p/) { # A process set begins with a PID field whose ID character is `p'. if ($pidst) { &save_proc } foreach $i (0 .. ($#F - 1)) { PROC: { if ($F[$i] =~ /^c(.*)/) { $cmd = $1; last PROC } if ($F[$i] =~ /^p(.*)/) { $pid = $1; last PROC } if ($F[$i] =~ /^R(.*)/) { $ppid = $1; last PROC } if ($F[$i] =~ /^L(.*)/) { $login = $1; last PROC } } } $pidst = 1; next; } # A file descriptor set begins with a file descriptor field whose ID # character is `f'. if ($F[0] =~ /^f/) { if ($faddr ne "") { next; } $proto = $name = ""; foreach $i (0 .. ($#F - 1)) { FD: { if ($F[$i] =~ /^P(.*)/) { $proto = $1; last FD; } if ($F[$i] =~ /^n(.*)/) { $name = $1; last FD; } if ($F[$i] =~ /^D(.*)/) { $dev = $1; last FD; } } } if ($proto eq "TCP" && $faddr eq "" && (($cmd =~ /rlogind/) || ($cmd =~ /sshd/) || ($cmd =~ /telnetd/))) { if (($name =~ /[^:]*:[^-]*->([^:]*):.*/)) { $faddr = $1; } } elsif ($tty eq "" && ($cmd =~ /.*sh$/)) { if (($name =~ m#/dev.*ty.*#)) { ($tty) = ($name =~ m#/dev.*/(.*)#); } elsif (($name =~ m#/dev/(pts/\d+)#)) { $tty = $1; } elsif (($name =~ m#/dev.*pts.*#)) { $d = oct($dev); $tty = sprintf("pts/%d", $d & 0xffff); } } next; } } # Flush any stored file or process output. if ($pidst) { &save_proc } # List the shell processes that have rlogind/sshd/telnetd parents. $hdr = 0; foreach $pid (sort keys(%shcmd)) { $p = $pid; if (!defined($raddr{$pid})) { for ($ff = 0; !$ff && defined($Ppid{$p}); ) { $p = $Ppid{$p}; if ($p < 2 || defined($raddr{$p})) { $ff = 1; } } } else { $ff = 2; } if ($ff && defined($raddr{$p})) { if (!$hdr) { printf "%-8.8s %-8.8s %6s %-10.10s %6s %-10.10s %s\n", "Login", "Shell", "PID", "Via", "PID", "TTY", "From"; $hdr = 1; } printf "%-8.8s %-8.8s %6d %-10.10s %6s %-10.10s %s\n", $shlogin{$pid}, $shcmd{$pid}, $pid, ($ff == 2) ? "(direct)" : $rcmd{$p}, ($ff == 2) ? "" : $p, ($shtty{$pid} eq "") ? "(unknown)" : $shtty{$pid}, $raddr{$p}; } } exit(0); # save_proc -- save process information # Values are stored inelegantly in global variables. sub save_proc { if (!defined($Ppid{$pid})) { $Ppid{$pid} = $ppid; } if ($faddr ne "") { $raddr{$pid} = $faddr; if (($cmd =~ /.*sh$/)) { $shcmd{$pid} = $cmd; $shlogin{$pid} = $login; } else { $rcmd{$pid} = $cmd; } } if ($tty ne "") { $shcmd{$pid} = $cmd; $shtty{$pid} = $tty; $shlogin{$pid} = $login; } # Clear variables. $cmd = $dev = $faddr = $pgrp = $pid = $ppid = $tty = ""; $pidst = 0; } ## isexec($path) -- is $path executable # # $path = absolute or relative path to file to test for executabiity. # Paths that begin with neither '/' nor '.' that arent't found as # simple references are also tested with the path prefixes of the # PATH environment variable. sub isexec { my ($path) = @_; my ($i, @P, $PATH); $path =~ s/^\s+|\s+$//g; if ($path eq "") { return(""); } if (($path =~ m#^[\/\.]#)) { if (-x $path) { return($path); } return(""); } $PATH = $ENV{PATH}; @P = split(":", $PATH); for ($i = 0; $i <= $#P; $i++) { if (-x "$P[$i]/$path") { return("$P[$i]/$path"); } } return(""); }