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# freebsd-lib.pl
# Functions for freebsd format last output
# passfiles_type()
# Returns 0 for old-style passwords (/etc/passwd only), 1 for FreeBSD-style
# (/etc/master.passwd) and 2 for SysV (/etc/passwd & /etc/shadow)
sub passfiles_type
{
return 1;
}
# groupfiles_type()
# Returns 0 for normal group file (/etc/group only) and 2 for shadowed
# (/etc/group and /etc/gshadow)
sub groupfiles_type
{
return 0;
}
# open_last_command(handle, user, [max])
sub open_last_command
{
my ($fh, $user, $max) = @_;
my $quser = quotemeta($user);
$max = " -n $max" if ($max);
open($fh, "(last -w$max $quser || last$max $quser) |");
}
# read_last_line(handle)
# Parses a line of output from last into an array of
# user, tty, host, login, logout, period
sub read_last_line
{
$fh = $_[0];
while(1) {
chop($line = <$fh>);
if (!$line) { return (); }
if ($line =~ /^(reboot|shutdown)/) { next; }
if ($line =~ /^(\S+)\s+(\S+)\s+(\S+)?\s+(\S+\s+\S+\s+\d+\s+\d+:\d+)\s+\-\s+(\S+)\s+\((.*?\d+:\d+.*?)\)/) {
# root pts/0 10.211.55.2 Tue Nov 22 21:06 - 23:16 (02:10:00)
# root pts/1 10.211.55.2 Wed Jun 29 13:13 - shutdown (7+00:01:20)
return ($1, $2, $3, $4, $5 eq "shutdown" ? "Shutdown" :
$5 eq "crash" ? "Crash" : $5, $6);
}
elsif ($line =~ /^(\S+)\s+(\S+)\s+(\S+)?\s+(\S+\s+\S+\s+\d+\s+\d+:\d+)\s+still/) {
return ($1, $2, $3, $4);
}
}
}
# use_md5()
# Returns 1 if pam is set up to use MD5 encryption
sub use_md5
{
local $md5 = 0;
&open_readfile(CONF, "/etc/login.conf");
while(<CONF>) {
s/\r|\n//g;
s/#.*$//;
$md5 = 1 if (/passwd_format\s*=\s*md5/);
$md5 = 2 if (/passwd_format\s*=\s*blowfish/);
$md5 = 3 if (/passwd_format\s*=\s*sha512/);
$md5 = 4 if (/passwd_format\s*=\s*yescrypt/);
}
close(CONF);
&open_readfile(CONF, "/etc/auth.conf");
while(<CONF>) {
s/\r|\n//g;
s/#.*$//;
$md5 = 1 if (/crypt_default\s*=\s*md5/);
$md5 = 2 if (/crypt_default\s*=\s*blowfish/);
$md5 = 3 if (/crypt_default\s*=\s*sha512/);
$md5 = 4 if (/crypt_default\s*=\s*yescrypt/);
}
close(CONF);
return $md5;
}
1;