18.04からUbuntu Server 20.04にアップグレードした後、実行中のプロセスがWebminに表示されない

Question

少し背景-最近、ヘッドレスUbuntu Server 18.04インストールを20.04にアップグレードしました。その過程で、webminはどういうわけか私のシステムからなくなりました。リポジトリが無効化されました。そこで、再度有効にしてから再インストールしました。ほとんどすべてが私が望んでいた場所（SMBサーバー構成）であり、基本的にメニューのカスタマイズとカスタムコマンドのみが失われました。

現在、webminでは、実行中のプロセスは表示されません。それは私が気づいた唯一の壊れていることに気づいた唯一のものです。だから私はwebminの github ページに投稿し、問題が修正されたというプロンプト応答 here を受け取りました。したがって、私のページの修正をwebminのインストールに実装する方法が本当にわからないので、私の質問はwebminの質問よりもgitの質問に近いと思います。誰かが私を正しい方向に導くことができれば、私はそれを高く評価します。

Answer 1

それは私を助けました！それをパッチとしてダウンロードする方法がわかりませんでしたが、私のシステムで参照しているファイルは/ usr/share/webmin/proc /にありました。そこでlinux.lib.plをバックアップしてから、nanoで編集しました。そこで、パッチに記載されている行（+は追加、-は削除）を変更して保存しました。それ以外の場合、それをダウンロードできれば、patchコマンドを使用しただけです。

Answer 2

私の答えは他に基づいています。私は次のことを行います。

rootユーザーとして：

# cd /usr/share/webmin/proc
# mv linux-lib.pl linux-lib.bkp.pl
# wget https://raw.githubusercontent.com/webmin/webmin/613f3a5f41fd094037629965e4cea1b815ac2b7d/proc/linux-lib.pl

Answer 3

# linux-lib.pl
# Functions for parsing linux ps output

use Time::Local;

sub get_ps_version
{
if (!$get_ps_version_cache) {
        local $out = &backquote_command("ps V 2>&1");
        if ($out =~ /version\s+([0-9\.]+)\./ ||
            $out =~ /\S+\s+([3-9][0-9\.]+)\./) {
                $get_ps_version_cache = $1;
                }
        }
return $get_ps_version_cache;
}

sub list_processes
{
local($pcmd, $line, $i, %pidmap, @plist, $dummy, @w, $_);
local $ver = &get_ps_version();
if ($ver && $ver < 2) {
        # Old version of ps
        $pcmd = join(' ' , @_);
        open(PS, "ps aulxhwwww $pcmd 2>/dev/nul |");
        for($i=0; $line=<PS>; $i++) {
                chop($line);
                if ($line =~ /ps aulxhwwww/) { $i--; next; }
                if ($line !~ /^\s*(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+([\-\d]+)\s+([\-\d]+)\s+(\d+)\s+(\d+)\s+(\S*)\s+(\S+)[\s<>N]+(\S+)\s+([0-9:]+)\s+(.*)$/) {
                        $i--;
                        next;
                        }
                $pidmap{$3} = $i;
                $plist[$i]->{"pid"} = $3;
                $plist[$i]->{"ppid"} = $4;
                $plist[$i]->{"user"} = getpwuid($2);
                $plist[$i]->{"size"} = "$7 kB";
                $plist[$i]->{"cpu"} = "Unknown";
                $plist[$i]->{"time"} = $12;
                $plist[$i]->{"Nice"} = $6;
                $plist[$i]->{"args"} = $13;
                $plist[$i]->{"_pri"} = $5;
                $plist[$i]->{"_tty"} = $11 eq "?" ? $text{'edit_none'} : "/dev/tty$11";
                $plist[$i]->{"_status"} = $stat_map{substr($10, 0, 1)};
                ($plist[$i]->{"_wchan"} = $9) =~ s/\s+$//g;
                if (!$plist[$i]->{"_wchan"}) { delete($plist[$i]->{"_wchan"}); }
                if ($plist[$i]->{"args"} =~ /^\((.*)\)/)
                        { $plist[$i]->{"args"} = $1; }
                }
        close(PS);
        open(PS, "ps auxh $pcmd |");
        while($line=<PS>) {
                if ($line =~ /^\s*(\S+)\s+(\d+)\s+(\S+)\s+(\S+)\s+/ &&
                    defined($pidmap{$2})) {
                        $plist[$pidmap{$2}]->{"cpu"} = $3;
                        $plist[$pidmap{$2}]->{"_mem"} = "$4 %";
                        }
                }
        close(PS);
}
else {
        # New version of ps, as found in redhat 6
        local $width;
        if ($ver >= 3.2) {
                # Use width format character if allowed
                $width = ":80";
                }
        open(PS, "ps --cols 2048 -eo user$width,ruser$width,group$width,rgroup$width,pid,ppid,pgid,pcpu,vsz,Nice,etime,time,stime,tty,args 2>/dev/null |");
        $dummy = <PS>;
        my @now = localtime(time());
        for($i=0; $line=<PS>; $i++) {
                chop($line);
                $line =~ s/^\s+//g;
                eval { @w = split(/\s+/, $line, -1); };
                if ($@) {
                        # Hit a split loop
                        $i--; next;
                        }
                if ($line =~ /ps --cols 500 -eo user/) {
                        # Skip process ID 0 or ps command
                        $i--; next;
                        }
                if (@_ && &indexof($w[4], @_) < 0) {
                        # Not interested in this PID
                        $i--; next;
                        }
                $plist[$i]->{"pid"} = $w[4];
                $plist[$i]->{"ppid"} = $w[5];
                $plist[$i]->{"user"} = $w[0];
                $plist[$i]->{"cpu"} = "$w[7] %";
                $plist[$i]->{"size"} = "$w[8] kB";
                $plist[$i]->{"bytes"} = $w[8]*1024;
                $plist[$i]->{"time"} = $w[11];
                $plist[$i]->{"_stime"} = $w[12];
                eval {
                        if (($w[12] =~ /^(\d+):(\d+)$/ ||
                             $w[12] =~ /^(\d+):(\d+):(\d+)$/) &&
                            $3 < 60 && $2 < 60 && $1 < 24) {
                                # Started today
                                $plist[$i]->{"_stime_unix"} =
                                        timelocal($3 || 0, $2, $1,
                                                  $now[3], $now[4], $now[5]);
                                }
                        elsif ($w[12] =~ /^(\S\S\S)\s*(\d+)$/ && $2 < 32) {
                                # Started on some other day
                                $plist[$i]->{"_stime_unix"} =
                                        timelocal(0, 0, 0, $2,
                                                &month_to_number($1), $now[5]);
                                }
                        };
                $plist[$i]->{"Nice"} = $w[9];
                $plist[$i]->{"args"} = @w<15 ? "defunct" : join(' ', @w[14..$#w]);
                $plist[$i]->{"_group"} = $w[2];
                $plist[$i]->{"_ruser"} = $w[1];
                $plist[$i]->{"_rgroup"} = $w[3];
                $plist[$i]->{"_pgid"} = $w[6];
                $plist[$i]->{"_tty"} = $w[13] =~ /\?/ ? $text{'edit_none'} : "/dev/$w[13]";
                }
        close(PS);
        }
return @plist;
}

# renice_proc(pid, Nice)
sub renice_proc
{
return undef if (&is_readonly_mode());
local $out = &backquote_logged("renice $_[1] -p $_[0] 2>&1");
if ($?) { return $out; }
return undef;
}

# find_mount_processes(mountpoint)
# Find all processes under some mount point
sub find_mount_processes
{
local($out);
&has_command("fuser") || &error("fuser command is not installed");
$out = &backquote_command("fuser -m ".quotemeta($_[0])." 2>/dev/null");
$out =~ s/[^0-9 ]//g;
$out =~ s/^\s+//g; $out =~ s/\s+$//g;
return split(/\s+/, $out);
}

# find_file_processes([file]+)
# Find all processes with some file open
sub find_file_processes
{
local($out, $files);
&has_command("fuser") || &error("fuser command is not installed");
$files = join(' ', map { quotemeta($_) } map { glob($_) } @_);
$out = &backquote_command("fuser $files 2>/dev/null");
$out =~ s/[^0-9 ]//g;
$out =~ s/^\s+//g; $out =~ s/\s+$//g;
return split(/\s+/, $out);
}

# get_new_pty()
# Returns the filehandles and names for a pty and tty
sub get_new_pty
{
if (-r "/dev/ptmx" && -d "/dev/pts" && open(PTMX, "+>/dev/ptmx")) {
        # Can use new-style PTY number allocation device
        local $unl;
        local $ptn;

        # ioctl to unlock the PTY (TIOCSPTLCK)
        $unl = pack("i", 0);
        ioctl(PTMX, 0x40045431, $unl) || &error("Unlock ioctl failed : $!");
        $unl = unpack("i", $unl);

        # ioctl to request a TTY (TIOCGPTN)
        ioctl(PTMX, 0x80045430, $ptn) || &error("PTY ioctl failed : $!");
        $ptn = unpack("i", $ptn);

        local $tty = "/dev/pts/$ptn";
        return (*PTMX, undef, $tty, $tty);
        }
else {
        # Have to search manually through pty files!
        local @ptys;
        local $devstyle;
        if (-d "/dev/pty") {
                opendir(DEV, "/dev/pty");
                @ptys = map { "/dev/pty/$_" } readdir(DEV);
                closedir(DEV);
                $devstyle = 1;
                }
        else {
                opendir(DEV, "/dev");
                @ptys = map { "/dev/$_" } (grep { /^pty/ } readdir(DEV));
                closedir(DEV);
                $devstyle = 0;
                }
        local ($pty, $tty);
        foreach $pty (@ptys) {
                open(PTY, "+>$pty") || next;
                local $tty = $pty;
                if ($devstyle == 0) {
                        $tty =~ s/pty/tty/;
                        }
                else {
                        $tty =~ s/m(\d+)$/s$1/;
                        }
                local $old = select(PTY); $| = 1; select($old);
                if ($< == 0) {
                        # Don't need to open the TTY file here for root,
                        # as it will be opened later after the controlling
                        # TTY has been released.
                        return (*PTY, undef, $pty, $tty);
                        }
                else {
                        # Must open now ..
                        open(TTY, "+>$tty");
                        select(TTY); $| = 1; select($old);
                        return (*PTY, *TTY, $pty, $tty);
                        }
                }
        return ();
        }
}

# close_controlling_pty()
# Disconnects this process from it's controlling PTY, if connected
sub close_controlling_pty
{
if (open(DEVTTY, "/dev/tty")) {
        # Special ioctl to disconnect (TIOCNOTTY)
        ioctl(DEVTTY, 0x5422, 0);
        close(DEVTTY);
        }
}

# open_controlling_pty(ptyfh, ttyfh, ptyfile, ttyfile)
# Makes a PTY returned from get_new_pty the controlling TTY (/dev/tty) for
# this process.
sub open_controlling_pty
{
local ($ptyfh, $ttyfh, $pty, $tty) = @_;

# Call special ioctl to attach /dev/tty to this new tty (TIOCSCTTY)
ioctl($ttyfh, 0x540e, 0);
}

# get_memory_info()
# Returns a list containing the real mem, free real mem, swap and free swap,
# and possibly cached memory and the burstable limit. All of these are in Kb.
sub get_memory_info
{
local %m;
local $memburst;
if (&running_in_openvz() && open(BEAN, "/proc/user_beancounters")) {
        # If we are running under Virtuozzo, there may be a limit on memory
        # use in force that is less than the real system's memory. Or it may be
        # a higher 'burstable' limit. Use this, unless it is unreasonably
        # high (like 1TB)
        local $pagesize = 1024;
        eval {
                use POSIX;
                $pagesize = POSIX::sysconf(POSIX::_SC_PAGESIZE);
                };
        while(<BEAN>) {
                if (/privvmpages\s+(\d+)\s+(\d+)\s+(\d+)/ &&
                    $3 < 1024*1024*1024*1024) {
                        $memburst = $3 * $pagesize / 1024;
                        last;
                        }
                }
        close(BEAN);
        }
open(MEMINFO, "/proc/meminfo") || return ();
while(<MEMINFO>) {
        if (/^(\S+):\s+(\d+)/) {
                $m{lc($1)} = $2;
                }
        }
close(MEMINFO);
local $memtotal;
if ($memburst && $memburst > $m{'memtotal'}) {
        # Burstable limit is higher than actual RAM
        $memtotal = $m{'memtotal'};
        }
elsif ($memburst && $memburst < $m{'memtotal'}) {
        # Limit is less than actual RAM
        $memtotal = $memburst;
        $memburst = undef;
        }
elsif ($memburst && $memburst == $m{'memtotal'}) {
        # Same as actual RAM
        $memtotal = $memburst;
        $memburst = undef;
        }
elsif (!$memburst) {
        # No burstable limit set, like on a real system
        $memtotal = $m{'memtotal'};
        }
return ( $memtotal,
         $m{'cached'} > $memtotal ? $m{'memfree'} :
                $m{'memfree'}+$m{'buffers'}+$m{'cached'},
         $m{'swaptotal'}, $m{'swapfree'},
         $m{'buffers'} + $m{'cached'},
         $memburst, );
}

# os_get_cpu_info()
# Returns a list containing the 5, 10 and 15 minute load averages, and the
# CPU mhz, model, vendor, cache and count
sub os_get_cpu_info
{
open(LOAD, "/proc/loadavg") || return ();
local @load = split(/\s+/, <LOAD>);
close(LOAD);
local %c;
open(CPUINFO, "/proc/cpuinfo");
while(<CPUINFO>) {
        if (/^(\S[^:]*\S)\s*:\s*(.*)/) {
                $c{lc($1)} = $2;
                }
        }
close(CPUINFO);
$c{'model name'} =~ s/\d+\s*mhz//i;
if ($c{'cache size'} =~ /^(\d+)\s+KB/i) {
        $c{'cache size'} = $1*1024;
        }
elsif ($c{'cache size'} =~ /^(\d+)\s+MB/i) {
        $c{'cache size'} = $1*1024*1024;
        }
if (!$c{'cpu mhz'} && $c{'model name'}) {
        $c{'bogomips'} =~ s/\..*$//;
        $c{'model name'} .= " @ ".$c{'bogomips'}." bMips";
        }

# Merge in info from /proc/device-tree
if (!$c{'model name'}) {
        $c{'model name'} = &read_file_contents("/proc/device-tree/model");
        }

if ($c{'model name'}) {
        return ( $load[0], $load[1], $load[2],
                 int($c{'cpu mhz'}), $c{'model name'}, $c{'vendor_id'},
                 $c{'cache size'}, $c{'processor'}+1 );
        }
else {
        return ( $load[0], $load[1], $load[2] );
        }
}

$has_trace_command = &has_command("strace");

# open_process_trace(pid, [&syscalls])
# Starts tracing on some process, and returns a trace object
sub open_process_trace
{
local $fh = time().$$;
local $sc;
if (@{$_[1]}) {
        $sc = "-e trace=".join(",", @{$_[1]});
        }
local $tpid = open($fh, "strace -t -p $_[0] $sc 2>&1 |");
$line = <$fh>;
return { 'pid' => $_[0],
         'tpid' => $tpid,
         'fh' => $fh };
}

# close_process_trace(&trace)
# Halts tracing on some trace object
sub close_process_trace
{
kill('TERM', $_[0]->{'tpid'}) if ($_[0]->{'tpid'});
close($_[0]->{'fh'});
}

# read_process_trace(&trace)
# Returns an action structure representing one action by traced process, or
# undef if an error occurred
sub read_process_trace
{
local $fh = $_[0]->{'fh'};
local @tm = localtime(time());
while(1) {
        local $line = <$fh>;
        return undef if (!$line);
        if ($line =~ /^(\d+):(\d+):(\d+)\s+([^\(]+)\((.*)\)\s*=\s*(\-?\d+|\?)/) {
                local $tm = timelocal($3, $2, $1, $tm[3], $tm[4], $tm[5]);
                local $action = { 'time' => $tm,
                                  'call' => $4,
                                  'rv' => $6 eq "?" ? undef : $6 };
                local $args = $5;
                local @args;
                while(1) {
                        if ($args =~ /^[ ,]*(\{[^}]*\})(.*)$/) {
                                # A structure in { }
                                Push(@args, $1);
                                $args = $2;
                                }
                        elsif ($args =~ /^[ ,]*"([^"]*)"\.*(.*)$/) {
                                # A quoted string
                                Push(@args, $1);
                                $args = $2;
                                }
                        elsif ($args =~ /^[ ,]*\[([^\]]*)\](.*)$/) {
                                # A square-bracket number
                                Push(@args, $1);
                                $args = $2;
                                }
                        elsif ($args =~ /^[ ,]*\<([^\>]*)\>(.*)$/) {
                                # An angle-bracketed string
                                Push(@args, $1);
                                $args = $2;
                                }
                        elsif ($args =~ /[ ,]*([^, ]+)(.*)$/) {
                                # Just a number
                                Push(@args, $1);
                                $args = $2;
                                }
                        else {
                                last;
                                }
                        }
                if ($args[$#args] eq $action->{'rv'}) {
                        pop(@args);     # last arg is same as return value?
                        }
                $action->{'args'} = \@args;
                return $action;
                }
        }
}

foreach $ia (keys %text) {
        if ($ia =~ /^linux(_\S+)/) {
                $info_arg_map{$1} = $text{$ia};
                }
        elsif ($ia =~ /^linuxstat_(\S+)/) {
                $stat_map{$1} = $text{$ia};
                }
        }

@Nice_range = (-20 .. 20);

$has_fuser_command = 1;

# os_list_scheduling_classes()
# Returns a list of Linux scheduling classes, if supported. Each element is a
# 2-element array ref containing a code and description.
sub os_list_scheduling_classes
{
if (&has_command("ionice")) {
        return ( [ 1, $text{'linux_real'} ],
                 [ 2, $text{'linux_be'} ],
                 [ 3, $text{'linux_idle'} ] );
        }
return ( );
}

# os_list_scheduling_priorities()
# Returns a list of IO priorities, each of which is an array ref containing
# a number and description
sub os_list_scheduling_priorities
{
return ( [ 0, "0 ($text{'edit_prihigh'})" ],
         [ 1 ], [ 2 ], [ 3 ], [ 4 ], [ 5 ], [ 6 ],
         [ 7, "7 ($text{'edit_prilow'})" ] );
}

# os_get_scheduling_class(pid)
# Returns the IO scheduling class and priority for a running program
sub os_get_scheduling_class
{
local ($pid) = @_;
local $out = &backquote_command("ionice -p ".quotemeta($pid));
if ($out =~ /^(realtime|best-effort|idle|none):\s+prio\s+(\d+)/) {
        return ($1 eq "realtime" ? 1 : $1 eq "best-effort" ? 2 :
                $1 eq "idle" ? 3 : 0, $2);
        }
return ( );
}

# os_set_scheduling_class(pid, class, priority)
# Sets the ID scheduling class and priority for some process. Returns an error
# message on failure, undef on success.
sub os_set_scheduling_class
{
local ($pid, $class, $prio) = @_;
local $cmd = "ionice -c ".quotemeta($class);
$cmd .= " -n ".quotemeta($prio) if (defined($prio));
$cmd .= " -p ".quotemeta($pid);
local $out = &backquote_logged("$cmd 2>&1 </dev/null");
return $? ? $out : undef;
}

# get_current_cpu_temps()
# Returns a list of hash refs containing CPU temperatures
sub get_current_cpu_temps
{
my @rv;
if (&has_command("sensors")) {
        my $fh = "SENSORS";
        &open_execute_command($fh, "sensors </dev/null 2>/dev/null", 1);
        while(<$fh>) {
                if (/Core\s+(\d+):\s+([\+\-][0-9\.]+)/) {
                        Push(@rv, { 'core' => $1,
                                    'temp' => $2 });
                        }
                elsif (/CPU:\s+([\+\-][0-9\.]+)/) {
                        Push(@rv, { 'core' => 0,
                                    'temp' => $1 });
                        }
                }
        close($fh);
        }
return @rv;
}

# get_cpu_io_usage()
# Returns a list containing CPU user, kernel, idle, io and VM time, and IO
# blocks in and out
sub get_cpu_io_usage
{
my $out,@lines,@w;
if (&has_command("vmstat")) {
        $out = &backquote_command("vmstat 1 2 2>/dev/null");
        @lines = split(/\r?\n/, $out);
        @w = split(/\s+/, $lines[$#lines]);
        shift(@w) if ($w[0] eq '');
        if ($w[8] =~ /^\d+$/ && $w[9] =~ /^\d+$/) {
            return ( @w[12..16], $w[8], $w[9] );
        }
    } elsif (&has_command("dstat")) {
        $out = &backquote_command("dstat 1 1 2>/dev/null");
        @lines = split(/\r?\n/, $out);
        @w = split(/[\s|]+/, $lines[$#lines]);
        shift(@w) if ($w[0] eq '');
        return( @w[0..4], @w[6..7]);
    }
    return undef;
}

1;

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