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#!/usr/bin/perl
# view_log.cgi
# Save, create, delete or view a log
require './logviewer-lib.pl';
&ReadParse();
&foreign_require("proc", "proc-lib.pl");
# Viewing a log file
my @extras = &extra_log_files();
if ($in{'idx'} =~ /^\//) {
# The drop-down selector on this page has chosen a file
if (&indexof($in{'idx'}, (map { $_->{'file'} } @extras)) >= 0) {
$in{'extra'} = $in{'idx'};
delete($in{'file'});
}
else {
$in{'file'} = $in{'idx'};
delete($in{'extra'});
}
delete($in{'idx'});
delete($in{'oidx'});
}
my $journal_since = &get_journal_since();
if ($in{'idx'} ne '') {
# From systemctl commands
if ($in{'idx'} =~ /^journal-/) {
my @systemctl_cmds = &get_systemctl_cmds(1);
my ($log);
if ($in{'idx'} eq 'journal-u') {
($log) = grep { $_->{'cmd'} =~ /--unit\s+\w+/ }
@systemctl_cmds;
$in{'idx'} = $log->{'id'};
}
else {
($log) = grep { $_->{'id'} eq $in{'idx'} }
@systemctl_cmds;
}
# If reverse is set, add it to the command
if ($reverse) {
$log->{'cmd'} .= " --reverse";
}
# If since is set and allowed, add it to the command
if ($in{'since'} &&
grep { $_ eq $in{'since'} }
map { keys %$_ } @$journal_since) {
$log->{'cmd'} .= " $in{'since'}";
}
&can_edit_log($log) && $access{'syslog'} ||
&error($text{'save_ecannot2'});
$cmd = $log->{'cmd'};
}
# System logs from other modules
elsif ($in{'idx'} =~ /^syslog-ng-/) {
if (&foreign_available('syslog-ng') &&
&foreign_installed('syslog-ng')) {
&foreign_require('syslog-ng');
my $conf = &syslog_ng::get_config();
my @dests = &syslog_ng::find("destination", $conf);
my $iid = $in{'idx'};
$iid =~ s/^syslog-ng-//;
my $log = $conf->[$iid];
my $dfile = &syslog_ng::find_value("file", $log->{'members'});
&can_edit_log({'file' => $dfile}) && $access{'syslog'} ||
&error($text{'save_ecannot2'});
$file = $dfile;
}
}
elsif ($in{'idx'} =~ /^syslog-/) {
if (&foreign_available('syslog') &&
&foreign_installed('syslog')) {
&foreign_require('syslog');
my $conf = &syslog::get_config();
my $iid = $in{'idx'};
$iid =~ s/^syslog-//;
my $log = $conf->[$iid];
&can_edit_log($log) && $access{'syslog'} ||
&error($text{'save_ecannot2'});
$file = $log->{'file'};
}
}
}
elsif ($in{'oidx'} ne '') {
# From another module
@others = &get_other_module_logs($in{'omod'});
($other) = grep { $_->{'mindex'} == $in{'oidx'} } @others;
&can_edit_log($other) && $access{'others'} ||
&error($text{'save_ecannot2'});
if ($other->{'file'}) {
$file = $other->{'file'};
}
else {
$cmd = $other->{'cmd'};
}
}
elsif ($in{'extra'}) {
# Extra log file
($extra) = grep { $_->{'file'} eq $in{'extra'} ||
$_->{'cmd'} eq $in{'extra'} } @extras;
$extra || &error($text{'save_ecannot7'});
&can_edit_log($extra) || &error($text{'save_ecannot2'});
$file = $extra->{'file'};
$cmd = $extra->{'cmd'};
}
elsif ($in{'file'}) {
# Explicitly named file
$access{'any'} || &error($text{'save_ecannot6'});
$file = $in{'file'};
&can_edit_log($file) || &error($text{'save_ecannot2'});
}
else {
&error($text{'save_emissing'});
}
print "Refresh: $config{'refresh'}\r\n"
if ($config{'refresh'});
my $lines = $in{'lines'} ? int($in{'lines'}) : int($config{'lines'});
my $jfilter = $in{'filter'} ? $in{'filter'} : "";
my $filter = $jfilter ? quotemeta($jfilter) : "";
my $reverse = $config{'reverse'} ? 1 : 0;
my $follow = $in{'since'} eq '--follow' ? 1 : 0;
my $no_navlinks = $in{'nonavlinks'} == 1 ? 1 : undef;
my $skip_index = $config{'skip_index'} == 1 ? 1 : undef;
my $help_link = (!$no_navlinks && $skip_index) ?
&help_search_link("systemd-journal journalctl", "man", "doc") : undef;
my $no_links = $no_navlinks || $skip_index;
my $cmd_unpacked = $cmd;
$cmd_unpacked =~ s/\\x([0-9A-Fa-f]{2})/pack('H2', $1)/eg;
$cmd_unpacked =~ s/\s+\-\-reverse// if ($follow);
$cmd_unpacked =~ s/\s+\-\-lines\s+\d+// if ($follow);
$cmd_unpacked .= " --grep \"@{[&html_escape($jfilter)]}\"" if ($filter);
my $view_title = $in{'idx'} =~ /^journal/ ?
$text{'view_titlejournal'} : $text{'view_title'};
&ui_print_header("<tt>".&html_escape($file || $cmd_unpacked)."</tt>",
$in{'linktitle'} || $view_title, "", undef,
!$no_navlinks && $skip_index,
($no_navlinks || $skip_index) ? 1 : undef,
0, $help_link);
&filter_form();
# Standard output
if (!$follow) {
$| = 1;
print "<pre>";
local $tailcmd = $config{'tail_cmd'} || "tail -n LINES";
$tailcmd =~ s/LINES/$lines/g;
my ($safe_proc_out, $safe_proc_out_got);
if ($filter ne "") {
# Are we supposed to filter anything? Then use grep.
local @cats;
if ($cmd) {
# Getting output from a command
push(@cats, $cmd);
}
elsif ($config{'compressed'}) {
# All compressed versions
foreach $l (&all_log_files($file)) {
$c = &catter_command($l);
push(@cats, $c) if ($c);
}
}
else {
# Just the one log
@cats = ( "cat ".quotemeta($file) );
}
$cat = "(".join(" ; ", @cats).")";
if ($reverse) {
$tailcmd .= " | tac" if ($cmd !~ /journalctl/);
}
$eflag = $gconfig{'os_type'} =~ /-linux/ ? "-E" : "";
$dashflag = $gconfig{'os_type'} =~ /-linux/ ? "--" : "";
if (@cats) {
my $fcmd;
if ($cmd =~ /journalctl/) {
$fcmd = "$cmd --grep $filter";
}
else {
$fcmd = "$cat | grep -i -a $eflag $dashflag $filter ".
"| $tailcmd";
}
open(my $output_fh, '>', \$safe_proc_out);
$safe_proc_out_got = &proc::safe_process_exec(
$fcmd, 0, 0, $output_fh, undef, 1, 0, undef, 1);
close($output_fh);
print $safe_proc_out if ($safe_proc_out !~ /-- No entries --/m);
}
else {
$safe_proc_out_got = undef;
}
} else {
# Not filtering .. so cat the most recent non-empty file
if ($cmd) {
# Getting output from a command
$fullcmd = $cmd.($cmd =~ /journalctl/ ? "" : (" | ".$tailcmd));
}
elsif ($config{'compressed'}) {
# Cat all compressed files
local @cats;
$total = 0;
foreach $l (reverse(&all_log_files($file))) {
next if (!-s $l);
$c = &catter_command($l);
if ($c) {
$len = int(&backquote_command(
"$c | wc -l"));
$total += $len;
push(@cats, $c);
last if ($total > $in{'lines'});
}
}
if (@cats) {
$cat = "(".join(" ; ", reverse(@cats)).")";
$fullcmd = $cat." | ".$tailcmd;
}
else {
$fullcmd = undef;
}
}
else {
# Just run tail on the file
$fullcmd = $tailcmd." ".quotemeta($file);
}
if ($reverse && $fullcmd) {
$fullcmd .= " | tac" if ($fullcmd !~ /journalctl/);
}
if ($fullcmd) {
open(my $output_fh, '>', \$safe_proc_out);
$safe_proc_out_got = &proc::safe_process_exec(
$fullcmd, 0, 0, $output_fh, undef, 1, 0, undef, 1);
close($output_fh);
print $safe_proc_out if ($safe_proc_out !~ /-- No entries --/m);
}
else {
$safe_proc_out_got = undef;
}
}
print "<i data-empty>$text{'view_empty'}</i>\n"
if (!$safe_proc_out_got || $safe_proc_out =~ /-- No entries --/m);
print "</pre>\n";
}
# Progressive output
else {
print "<pre id='logdata' data-reversed='$reverse'>";
print "<i data-loading>$text{'view_loading'}</i>\n";
print "</pre>\n";
my %tinfo = &get_theme_info($current_theme);
my $spa_theme = $tinfo{'spa'} ? 1 : 0;
print <<EOF;
<script>
// Abort previous log viewer progress fetch
if (typeof fn_logviewer_progress_abort === 'function') {
fn_logviewer_progress_abort();
}
// Update log viewer with new data from the server
(async function () {
const logviewer_progress_abort = new AbortController();
const logDataElement = document.getElementById("logdata"),
response = await fetch("view_log_progress.cgi?idx=$in{'idx'}&filter=$jfilter",
{ signal: logviewer_progress_abort.signal }),
reader = response.body.getReader(),
decoder = new TextDecoder("utf-8"),
processText = async function () {
let { done, value } = await reader.read();
while (!done) {
const chunk = decoder.decode(value, { stream: true }).trim(),
dataReversed = logDataElement.getAttribute("data-reversed");
if (!processText.started) {
processText.started = true;
const loadingElement = logDataElement.querySelector("i[data-loading]");
if (loadingElement) {
loadingElement.remove();
}
}
let lines = chunk.split("\\n");
if (dataReversed === "1") {
lines = lines.reverse();
logDataElement.textContent =
lines.join("\\n") + "\\n" + logDataElement.textContent;
}
else {
logDataElement.textContent += lines.join("\\n") + "\\n";
}
if (typeof fn_logviewer_progress_update === 'function') {
fn_logviewer_progress_update(chunk, dataReversed);
}
({ done, value } = await reader.read());
}
};
if (typeof fn_logviewer_progress_status === 'function') {
fn_logviewer_progress_status(response);
}
fn_logviewer_progress_abort = function () {
logviewer_progress_abort.abort();
fn_logviewer_progress_abort = null;
}
if ($spa_theme !== 1) {
window.onbeforeunload = function() {
if (typeof fn_logviewer_progress_abort === 'function') {
fn_logviewer_progress_abort();
}
};
}
processText().catch((error) => {
if (typeof fn_logviewer_progress_ended === 'function') {
fn_logviewer_progress_ended(error);
}
});
})();
</script>
EOF
}
&filter_form();
if ($no_links) {
&ui_print_footer();
}
else {
&ui_print_footer("", $text{'index_return'});
}
sub filter_form
{
print &ui_form_start("view_log.cgi");
if ($no_navlinks) {
print &ui_hidden("nonavlinks", $no_navlinks),"\n";
}
print &ui_hidden("linktitle", $in{'linktitle'}),"\n";
print &ui_hidden("oidx", $in{'oidx'}),"\n";
print &ui_hidden("omod", $in{'omod'}),"\n";
print &ui_hidden("file", $in{'file'}),"\n";
print &ui_hidden("extra", $in{'extra'}),"\n";
print &ui_hidden("view", 1),"\n";
# Create list of logs and selector
my @logfiles;
my $found = 0;
my $text_view_header = 'view_header';
if ($access{'syslog'}) {
# Logs from syslog
my @systemctl_cmds = &get_systemctl_cmds(1);
foreach $c (@systemctl_cmds) {
next if (!&can_edit_log($c));
my $icon = $c->{'id'} =~ /journal-(a|x)/ ? "◦ " : "";
push(@logfiles, [ $c->{'id'}, $icon.$c->{'desc'} ]);
$found++ if ($c->{'id'} eq $in{'idx'});
}
# System logs from other modules
my @foreign_syslogs;
if (&foreign_available('syslog') &&
&foreign_installed('syslog')) {
&foreign_require('syslog');
my $conf = &syslog::get_config();
foreach $c (@$conf) {
next if ($c->{'tag'});
next if (!&can_edit_log($c));
next if (!$c->{'file'} || !-f $c->{'file'});
push(@logfiles, [ "syslog-$c->{'index'}", $c->{'file'} ]);
$found++ if ($c->{'file'} eq $file);
push(@foreign_syslogs, $c->{'file'});
}
}
if (&foreign_available('syslog-ng') &&
&foreign_installed('syslog-ng')) {
&foreign_require('syslog-ng');
my $conf = &syslog_ng::get_config();
my @dests = &syslog_ng::find("destination", $conf);
foreach my $dest (@dests) {
my $dfile = &syslog_ng::find_value("file", $dest->{'members'});
my ($type, $typeid) = &syslog_ng::nice_destination_type($dest);
next if (grep(/^$dfile$/, @foreign_syslogs));
next if ($dfile !~ /^\//);
if ($typeid == 0 && -f $dfile) {
my @cols;
if ($dfile && -f $dfile) {
push(@logfiles, [ "syslog-ng-$dest->{'index'}", $dfile ]);
$found++ if ($dfile eq $file);
}
}
}
}
}
if ($config{'others'} && $access{'others'}) {
foreach my $o (&get_other_module_logs()) {
next if (!&can_edit_log($o));
next if (!$o->{'file'});
push(@logfiles, [ $o->{'file'} ]);
$found++ if ($o->{'file'} eq $file);
}
}
foreach $e (&extra_log_files()) {
next if (!&can_edit_log($e));
push(@logfiles, [ $e->{'file'} ]);
$found++ if ($e->{'file'} eq $file);
}
if (@logfiles && $found) {
$sel = &ui_select("idx", $in{'idx'} eq '' ? $file : $in{'idx'},
[ @logfiles ], undef, undef, undef, undef,
"onChange='form.submit()' style='max-width: 240px'");
if ($in{'idx'} =~ /^journal-/) {
my $since_label = $follow ? $text{'journal_sincefollow'} :
$text{'journal_since'};
$sel .= "$since_label " .
&ui_select("since", $in{'since'},
[ map { my ($key) = keys %$_;
[ $key, $_->{$key} ] }
@$journal_since ],
undef, undef, undef, undef,
"onChange='form.submit()'");
}
}
else {
$text_view_header = 'view_header2';
print &ui_hidden("idx", $in{'idx'}),"\n";
}
if ($follow) {
print &text('view_header3', " $sel"),"\n";
}
else {
print &text($text_view_header, " " . &ui_textbox("lines", $lines, 3), " $sel"),"\n";
}
print " \n";
print &text('view_filter', " " . &ui_textbox("filter", $in{'filter'}, 12)),"\n";
print " \n";
print &ui_submit($text{'view_filter_btn'});
print &ui_form_end(),"<br>\n";
}