PAL.C.T MINI SHELL
#!/usr/bin/perl
# index.cgi
# Show the shell user interface
$unsafe_index_cgi = 1;
require './shell-lib.pl';
%access = &get_module_acl();
&ReadParseMime() if ($ENV{'REQUEST_METHOD'} ne 'GET');
&ui_print_header(undef, $text{'index_title'}, "", undef,
$module_info{'usermin'} ? 0 : 1, 1,
undef, undef, undef,
"onLoad='window.scroll(0, 10000); document.forms[0].cmd.focus()'");
$prevfile = "$module_config_directory/previous.$remote_user";
if ($in{'clearcmds'}) {
&lock_file($prevfile);
unlink($prevfile);
&unlock_file($prevfile);
&webmin_log("clear");
}
else {
open(PREVFILE, $prevfile);
chop(@previous = <PREVFILE>);
close(PREVFILE);
}
$cmd = $in{'doprev'} ? $in{'pcmd'} : $in{'cmd'};
if ($in{'pwd'}) {
$pwd = $in{'pwd'};
}
else {
if ($gconfig{'os_type'} eq 'windows') {
# Initial directory is c:/
$pwd = "c:/";
}
else {
# Initial directory is user's home
local @uinfo = getpwnam($access{'user'} || $remote_user);
$pwd = scalar(@uinfo) && -d $uinfo[7] ? $uinfo[7] : "/";
}
}
if (!$in{'clear'}) {
$history = &un_urlize($in{'history'});
if ($cmd) {
# Execute the latest command
$fullcmd = $cmd;
$ok = chdir($pwd);
$history .= "<b>> ".&html_escape($cmd, 1)."</b>\n";
if ($cmd =~ /^cd\s+"([^"]+)"\s*(;?\s*(.*))$/ ||
$cmd =~ /^cd\s+'([^']+)'\s*(;?\s*(.*))$/ ||
$cmd =~ /^cd\s+([^; ]*)\s*(;?\s*(.*))$/) {
$cmd = undef;
if (!chdir($1)) {
$history .= &html_escape("$1: $!\n", 1);
}
else {
$cmd = $3 if ($2);
$pwd = &get_current_dir();
}
}
if ($cmd) {
local $user = $access{'user'} || $remote_user;
&clean_environment() if ($config{'clear_envs'});
delete($ENV{'SCRIPT_NAME'}); # So that called Webmin
# programs get the right
# module, not this one!
if (&supports_users() && $user ne "root") {
$cmd = &command_as_user($user, 0, $cmd);
}
else {
$cmd = "($cmd)";
}
$pid = &open_execute_command(OUTPUT, $cmd, 2, 0);
$out = "";
$trunc = 0;
$total = 0;
$timedout = 0;
$start = time();
$max = $config{'max_runtime'};
while(1) {
$elapsed = time() - $start;
if ($config{'max_runtime'}) {
# Wait for some output, up to timeout
if ($elapsed >= $max) {
$timedout = 1;
last;
}
local $rmask;
vec($rmask, fileno(OUTPUT), 1) = 1;
$sel = select($rmask, undef, undef,
$config{'max_runtime'} - $elapsed);
$elapsed = time() - $start;
if (!$sel || $sel < 0) {
# Select didn't find anything
if ($elapsed >= $max) {
$timedout = 1;
}
last;
}
}
local $buf;
$got = sysread(OUTPUT, $buf, 1024);
last if ($got <= 0);
$total += length($buf);
if ($config{'max_output'} &&
length($out) < $config{'max_output'}) {
$out .= $buf;
}
else {
$trunc = 1;
}
}
if ($timedout && $pid) {
kill('TERM', $pid);
}
close(OUTPUT);
&reset_environment() if ($config{'clear_envs'});
if ($out && $out !~ /\n$/) {
$out .= "\n";
}
$out = &html_escape($out, 1);
if ($trunc) {
$out .= "<i>".&text('index_trunced',
&nice_size($config{'max_output'}),
&nice_size($total))."</i><p>\n";
}
if ($timedout) {
$out .= "<i>".&text('index_timedout',
$config{'max_runtime'})."</i><p>\n";
}
$history .= $out;
}
@previous = &unique(@previous, $fullcmd);
&lock_file($prevfile);
&open_tempfile(PREVFILE, ">>$prevfile");
&print_tempfile(PREVFILE, $fullcmd,"\n");
&close_tempfile(PREVFILE);
&unlock_file($prevfile);
&webmin_log("run", undef, undef, { 'cmd' => $fullcmd });
}
}
# Show the history and command input
if ($history) {
print &ui_table_start($text{'shell_history'}, "width=100%", 2);
print &ui_table_row(undef, "<pre>$history</pre>", 2);
print &ui_table_end();
print &ui_hr();
}
print "$text{'index_desc'}<br>\n";
print &ui_form_start("index.cgi", "form-data");
print "<table width=100%><tr>\n";
# Command to run
print "<td width=10%>",&ui_submit($text{'index_ok'}),"</td>\n";
print "<td>",&ui_textbox("cmd", undef, 50, 0, undef,
"style='width:100%'"),"</td>\n";
print "<td align=right width=10%>",&ui_submit($text{'index_clear'}, "clear"),
"</td>\n";
print "</tr>\n";
print &ui_hidden("pwd", $pwd);
print &ui_hidden("history", &urlize($history));
foreach $p (@previous) {
print &ui_hidden("previous", $p);
}
# Previous command menu
if (@previous) {
print "<tr>\n";
print "<td width=10%>",&ui_submit($text{'index_pok'}, "doprev"),
"</td>\n";
print "<td>",&ui_select("pcmd", undef,
[ map { [ $_, &html_escape($_) ] } reverse(@previous) ]);
print "<input type=button name=movecmd ",
"value='$text{'index_edit'}' ",
"onClick='cmd.value = pcmd.options[pcmd.selectedIndex].value'>\n";
print "</td>\n";
print "<td align=right width=10%>",
&ui_submit($text{'index_clearcmds'}, "clearcmds"),"</td>\n";
print "</tr>\n";
}
print "</table>\n";
print &ui_form_end();
&ui_print_footer("/", $text{'index'});
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