#!/usr/bin/perl -w # # Copyright (c) 1996, 2001, 2002 Todd C. Miller <Todd.Miller@courtesan.com> # # Permission to use, copy, modify, and distribute this software for any # purpose with or without fee is hereby granted, provided that the above # copyright notice and this permission notice appear in all copies. # # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. # # Sponsored in part by the Defense Advanced Research Projects # Agency (DARPA) and Air Force Research Laboratory, Air Force # Materiel Command, USAF, under agreement number F39502-99-1-0512. # # Prune commented out, bogus, and crufty entries from /etc/skeykeys # Usage: skeyprune [days] # # $OpenBSD: skeyprune.pl,v 1.5 2003/06/17 21:56:26 millert Exp $ # use POSIX qw(S_ISREG); use Fcntl qw(:DEFAULT :flock); # Keep out the stupid die "Only root may run $0.\n" if $>; die "Usage: $0 [days]\n" if $#ARGV > 0; # Pathnames $skeydir = '/etc/skey'; # Remove entries that haven't been modified in this many days. $days_old = $ARGV[0] || -1; # Safe umask umask(077); # Current time $now = time(); # Slurp mode undef $/; chdir($skeydir) || die "$0: Can't cd to $skeydir: $!\n"; opendir(SKEYDIR, ".") || die "$0: Can't open $skeydir: $!\n"; while (defined($user = readdir(SKEYDIR))) { next if $user =~ /^\./; if (!sysopen(SKEY, $user, 0, O_RDWR | O_NONBLOCK | O_NOFOLLOW)) { warn "$0: Can't open $user: $!\n"; next; } if (!flock(SKEY, LOCK_EX)) { warn "$0: Can't lock $user: $!\n"; close(SKEY); next; } if (!stat(SKEY)) { warn "$0: Can't stat $user: $!\n"; close(SKEY); next; } # Sanity checks. if (!S_ISREG((stat(_))[2])) { warn "$0: $user is not a regular file\n"; close(SKEY); next; } if (((stat(_))[2] & 07777) != 0600) { printf STDERR ("%s: Bad mode for %s: 0%o\n", $0, $user, (stat(_))[2]); close(SKEY); next; } if ((stat(_))[3] != 1) { printf STDERR ("%s: Bad link count for %s: %d\n", $0, $user, (stat(_))[3]); close(SKEY); next; } # Remove zero size entries if (-z _) { unlink($user) || warn "$0: Can't unlink $user: $!\n"; close(SKEY); next; } # Prune out old entries if asked to if ($days_old > 0) { $then = (stat(_))[9]; if (($now - $then) / (60 * 60 * 24) - 1 > $days_old) { unlink($user) || warn "$0: Can't unlink $user: $!\n"; close(SKEY); next; } } # Read in the entry and check its contents. $entry = <SKEY>; if ($entry !~ /^\S+[\r\n]+\S+[\r\n]+\d+[\r\n]+[A-z0-9]+[\r\n]+[a-f0-9]+[\r\n]+$/) { warn "$0: Invalid entry for $user:\n$entry"; } close(SKEY); } exit(0);