PAL.C.T MINI SHELL
# linux-lib.pl
# Functions for printcap-style printer management
# list_printers()
# Returns a list of known printer names
sub list_printers
{
local($l, @rv);
foreach $l (&list_printcap()) {
$l->{'name'} =~ /^([^\|]+)/;
push(@rv, $1);
}
return @rv;
}
# get_printer(name, [nostatus])
sub get_printer
{
local($l, %prn, @w, @n, $w, %cap, @jobs);
foreach $l (&list_printcap()) {
@n = split(/\|/, $l->{'name'});
if ($n[0] eq $_[0]) {
# found the printer.. get info from printcap
$prn{'name'} = $n[0];
if (@n > 2) { $prn{'alias'} = [ @n[1..$#n-1] ]; }
if (@n > 1) { $prn{'desc'} = $n[$#n]; }
$prn{'iface'} = $l->{'if'};
$prn{'banner'} = !defined($l->{'sh'});
$prn{'dev'} = $l->{'lp'};
$prn{'rhost'} = $l->{'rm'};
$prn{'rqueue'} = $l->{'rp'};
$prn{'msize'} = $l->{'mx'};
$prn{'comment'} = $l->{'comment'};
$prn{'ro'} = $l->{'file'} eq $config{'ro_printcap_file'};
if (!$_[1]) {
# call lpc to get status
local $esc = quotemeta($prn{'name'});
$out = &backquote_command("lpc status $esc 2>&1", 1);
$prn{'accepting'} = ($out =~ /queuing is enabled/);
$prn{'enabled'} = ($out =~ /printing is enabled/);
}
return \%prn;
}
}
return undef;
}
# get_jobs(printer)
sub get_jobs
{
local (@jobs, $htype);
local $esc = quotemeta($_[0]);
open(LPQ, "lpq -P$esc |");
while(<LPQ>) {
chop;
if (/^\s*Rank\s+Owner\s+\S+\s+Job/) { $htype = 2; }
elsif (/^Rank\s+Owner\s+/) { $htype = 1; }
elsif ($htype == 1 &&
/^(\S+)\s+(\S+)\s+(\d+)\s+(.*\S)\s+(\d+)\s+(\S+)$/) {
# Normal lpq output
local(%job, $f, @pq);
$job{'id'} = $3;
$job{'user'} = $2;
$job{'size'} = $5;
$job{'file'} = $4;
$job{'printing'} = ($1 eq "active");
local $d = "$config{'spool_dir'}/$_[0]";
opendir(DIR, $d);
while($f = readdir(DIR)) {
if ($f =~ /df.(\d+)/ && $1 == $job{'id'}) {
push(@pq, "$d/$f");
}
}
closedir(DIR);
$job{'printfile'} = @pq ? \@pq : undef;
push(@jobs, \%job);
}
elsif ($htype == 2 &&
/^\s*(\S+)\s+(\S+)\s+(\S+)\s+(\d+)\s+(\S+)\s+(\S+)\s+(\d*)\s+(\S+)\s+(\S+)\s+(\S+)$/) {
# PLP lpq output
local(%job);
$job{'id'} = $4;
$job{'user'} = $2;
$job{'size'} = $4;
$job{'file'} = $6;
push(@jobs, \%job);
}
}
close(LPQ);
return @jobs;
}
sub printer_support
{
return $_[0] !~ /^(why|allow|default|ctype|sysv|direct|ipp)$/;
}
# create_printer(&details)
# Create a new printer in /etc/printcap
sub create_printer
{
local(%cap);
$cap{'sd'} = "$config{'spool_dir'}/$_[0]->{'name'}";
&lock_file($cap{'sd'});
mkdir($cap{'sd'}, 0755);
&unlock_file($cap{'sd'});
&lock_file($config{'printcap_file'});
local $lref = &read_file_lines($config{'printcap_file'});
push(@$lref, &make_printcap($_[0], \%cap));
&flush_file_lines($config{'printcap_file'});
&unlock_file($config{'printcap_file'});
&apply_status($_[0]);
}
# modify_printer(&details)
sub modify_printer
{
local(@old, $o, $old, @cap);
&lock_file($config{'printcap_file'});
@old = &list_printcap();
foreach $o (@old) {
$o->{'name'} =~ /^([^\|]+)/;
if ($1 eq $_[0]->{'name'}) {
# found current details
$old = $o;
last;
}
}
if (!$old) { &error("Printer '$_[0]->{'name'}' no longer exists"); }
&lock_file($config{'printcap_file'});
local $lref = &read_file_lines($config{'printcap_file'});
splice(@$lref, $old->{'line'}, $old->{'eline'} - $old->{'line'} + 1,
&make_printcap($_[0], $old));
&flush_file_lines($config{'printcap_file'});
&unlock_file($config{'printcap_file'});
&apply_status($_[0]);
}
# delete_printer(name)
sub delete_printer
{
local(@old, $o, $old, @cap);
&lock_file($config{'printcap_file'});
@old = &list_printcap();
foreach $o (@old) {
$o->{'name'} =~ /^([^\|]+)/;
if ($1 eq $_[0]) {
# found current details
$old = $o;
last;
}
}
if (!$old) { &error("Printer '$_[0]' no longer exists"); }
&lock_file($config{'printcap_file'});
local $lref = &read_file_lines($config{'printcap_file'});
splice(@$lref, $old->{'line'}, $old->{'eline'} - $old->{'line'} + 1);
&flush_file_lines($config{'printcap_file'});
&unlock_file($config{'printcap_file'});
if ($old->{'sd'} eq "$config{'spool_dir'}/$_[0]") {
system("rm -rf '$old->{'sd'}'");
}
}
# cancel_job(printer, job)
# Calls lprm to remove some job
sub cancel_job
{
local($out);
local $esc = quotemeta($_[0]);
local $iesc = quotemeta($_[1]);
$out = &backquote_logged("lprm -P$esc $iesc 2>&1");
if ($?) { &error("lprm failed : $out"); }
}
# make_printcap(&details, &old)
# Updates or creates a printcap line
sub make_printcap
{
local(%prn, %cap, $a, $rv, $c);
%prn = %{$_[0]}; %cap = %{$_[1]};
$cap{'if'} = $prn{'iface'} ? $prn{'iface'} : undef;
$cap{'sh'} = $prn{'banner'} ? undef : "";
$cap{'lp'} = $prn{'dev'} ? $prn{'dev'} : undef;
$cap{'rm'} = $prn{'rhost'} ? $prn{'rhost'} : undef;
$cap{'rp'} = $prn{'rqueue'} ? $prn{'rqueue'} : undef;
$cap{'mx'} = defined($prn{'msize'}) ? $prn{'msize'} : undef;
$rv = $prn{'comment'}."\n" if ($prn{'comment'});
$rv .= $prn{'name'};
foreach $a (@{$prn{'alias'}}) { $rv .= "|$a"; }
$rv .= "|$prn{'desc'}" if ($prn{'desc'});
foreach $c (keys %cap) {
if ($c =~ /^(\S\S)(#?)$/ && defined($cap{$c})) {
if ($cap{$c} eq "") { $rv .= ":$c"; }
elsif ($cap{$c} =~ /^\d+$/) { $rv .= ":$c#$cap{$c}"; }
else { $rv .= ":$c=$cap{$c}"; }
}
}
$rv .= ":";
return $rv;
}
# list_printcap()
# Returns an array of associative arrays containing printcap fields
sub list_printcap
{
return @list_printcap_cache if (scalar(@list_printcap_cache));
local(@rv, @line, @comment, @eline, @sline, $line, $cont, $lnum, $i,
%done, $capfile);
foreach $capfile ($config{'printcap_file'}, $config{'ro_printcap_file'}) {
next if (!$capfile || $done{$capfile}++);
open(CAP, "<".$capfile);
$lnum = 0;
while($line = <CAP>) {
$line =~ s/\s+$//g; # remove trailing spaces/newline
if ($line =~ /^(##.*)/) {
# special commented line .. keep it
$comment[@line] = $line;
}
else {
$line =~ s/^#.*$//g; # remove comments
$line =~ s/^\s+//g; # remove leading spaces
if ($line =~ /\S/) {
local $ncont = ($line =~ s/\\$//g);
if ($cont) {
$line[$#line] .= $line;
$eline[@line - 1] = $lnum;
}
else {
push(@line, $line);
$eline[@line - 1] = $sline[@line - 1] = $lnum;
}
$cont = $ncont;
}
else {
# only keep comments immediately before an entry
$comment[@line] = undef;
}
}
$lnum++;
}
close(CAP);
for($i=0; $i<@line; $i++) {
local(%cap);
@w = split(/:+/, $line[$i]);
$cap{'name'} = $w[0];
$cap{'line'} = $sline[$i] - ($comment[$i] ? 1 : 0);
$cap{'eline'} = $eline[$i];
$cap{'comment'} = $comment[$i];
$cap{'file'} = $capfile;
foreach $w (@w[1..$#w]) {
if ($w =~ /^([A-z0-9]+)[=#](.*)$/) { $cap{$1} = $2; }
elsif ($w =~ /^([A-z0-9]+)$/) { $cap{$w} = ""; }
}
push(@rv, \%cap);
}
}
@list_printcap_cache = @rv;
return @rv;
}
# apply_status(&details)
# Calls lpc to enable or disable a printer.
# Restarting lpd doesn't seem to be necessary?
sub apply_status
{
local($out);
local $esc = quotemeta($_[0]->{'name'});
$out = &backquote_command("lpc status $esc 2>&1", 1);
if ($_[0]->{'enabled'} && $out !~ /printing is enabled/)
{ &backquote_logged("lpc up $esc"); }
elsif (!$_[0]->{'enabled'} && $out =~ /printing is enabled/)
{ &backquote_logged("lpc down $esc"); }
if ($_[0]->{'accepting'} && $out !~ /queuing is enabled/)
{ &backquote_logged("lpc enable $esc"); }
elsif (!$_[0]->{'accepting'} && $out =~ /queuing is enabled/)
{ &backquote_logged("lpc disable $esc"); }
}
# sched_running()
# Returns the pid if lpsched is running, 0 if not, -1 if cannot be stopped
sub sched_running
{
@pid = &find_byname("lpd");
if (@pid) { return $pid[0]; }
return 0;
}
# start_sched()
# Start lpsched
sub start_sched
{
local $out = &backquote_logged("lpd 2>&1");
if ($?) { &error("failed to start lpd : <tt>$out</tt>"); }
}
# stop_sched(pid)
# Stop the running lpsched process
sub stop_sched
{
local @pid = &find_byname("lpd");
&kill_logged('TERM', @pid) || &error("Failed to stop lpd : $!");
}
# print_command(printer, file)
# Returns the command to print some file on some printer
sub print_command
{
local $esc = quotemeta($_[0]);
local $fesc = quotemeta($_[1]);
return "lpr -P$esc $fesc";
}
# check_print_system()
sub check_print_system
{
&has_command("lpr") || return &text('linux_ecmd', "<tt>lpr</tt>");
-d $config{'spool_dir'} || return &text('linux_espool', "<tt>$config{'spool_dir'}</tt>");
return undef;
}
if (-r "/dev/lp0") {
@device_files = ("/dev/lp0", "/dev/lp1", "/dev/lp2", "/dev/lp3",
"/dev/ttyS0", "/dev/ttyS1", "/dev/null");
}
else {
@device_files = ("/dev/lp1", "/dev/lp2", "/dev/lp2", "/dev/lp3",
"/dev/ttyS0", "/dev/ttyS1", "/dev/null");
}
if (-r "/dev/usblp0") {
push(@device_files, "/dev/usblp0", "/dev/usblp1",
"/dev/usblp2", "/dev/usblp3");
}
elsif (-r "/dev/usb/lp0") {
push(@device_files, "/dev/usb/lp0", "/dev/usb/lp1",
"/dev/usb/lp2", "/dev/usb/lp3");
}
@device_names = (&text('linux_paralel', "1"), &text('linux_paralel', "2"),
&text('linux_paralel', "3"), &text('linux_paralel', "4"),
&text('linux_serial', "1"), &text('linux_serial', "2"),
$text{'linux_null'}, &text('linux_usb', 1),
&text('linux_usb', 2), &text('linux_usb', 3),
&text('linux_usb', 4));
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