Edit: /usr/share/usermin/proc/linux-lib.pl (24345B)
# 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, $_);
local @want = grep { /^\d+$/ } @_;
return ( ) if (@_ && !@want);
local $ver = &get_ps_version();
if ($ver && $ver < 2) {
# Old version of ps
$pcmd = join(' ' , @want);
open(PS, "ps aulxhwwww $pcmd 2>/dev/nul |");
for($i=0; $line=
; $i++) {
chop($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]->{"bytes"} = $7*1024;
$plist[$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=) {
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 || $ver >= 3.2) {
# Use width format character if allowed
$width = ":80";
}
my $pscmd = "ps --cols 2048 -eo user$width,ruser$width,group$width,rgroup$width,pid,ppid,pgid,pcpu,rss,nice,etime,time,stime,tty,args";
open(PS, "$pscmd 2>/dev/null |");
$dummy = ;
my @now = localtime(time());
for($i=0; $line=; $i++) {
chop($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
$i--; next;
}
if (@want && &indexof($w[4], @want) < 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]";
$plist[$i]->{"_pscmd"} = 1 if ($plist[$i]->{"args"} =~ /\Q$pscmd\E/);
}
close(PS);
}
return @plist;
}
# renice_proc(pid, nice)
sub renice_proc
{
return undef if (&is_readonly_mode());
local $out = &backquote_logged("renice ".quotemeta($_[1])." -p ".
quotemeta($_[0])." 2>&1");
if ($?) { 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);
}
# linux_openpty()
# Linux-only, pure-Perl openpty(3)-style helper.
# Returns master fh, slave fh, slave path, and ioctl value on success
sub linux_openpty
{
require Fcntl; Fcntl->import(qw(O_RDWR));
require POSIX; POSIX->import(qw(setsid));
# Linux ioctl values
my $TIOCGPTN = 0x80045430; # get pty number
my $TIOCSPTLCK = 0x40045431; # unlock slave
my $TIOCSCTTY = 0x540E; # set controlling tty
my ($ptmx, $ttyfh);
# Open PTY master
sysopen($ptmx, "/dev/ptmx", O_RDWR) || return;
# Unlock the slave
my $lock = pack("i", 0);
ioctl($ptmx, $TIOCSPTLCK, $lock) || do {
close($ptmx);
return;
};
# Get slave number
my $buf = pack("i", 0);
ioctl($ptmx, $TIOCGPTN, $buf) || do {
close($ptmx);
return;
};
my $n = unpack("i", $buf);
# Open PTY slave
my $tty = "/dev/pts/$n";
open($ttyfh, "+<", $tty) || do {
close($ptmx);
return;
};
# Return master fh, slave fh, slave path, ioctl value
return ($ptmx, $ttyfh, $tty, $TIOCSCTTY);
}
# 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, ") {
if (/privvmpages\s+(\d+)\s+(\d+)\s+(\d+)/ &&
$3 < 1024*1024*1024*1024) {
$memburst = $3 * $pagesize / 1024;
last;
}
}
close(BEAN);
}
open(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, ");
close(LOAD);
local %c;
open(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]}) {
$sc = "-e trace=".join(",", map { quotemeta($_) } grep { $_ ne "" }
@{$_[1]});
}
local $tpid = open($fh, "strace -t -p ".quotemeta($_[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 $i);
};
if (&has_command("sensors")) {
my ($cpu, $cpu_aux, $cpu_unnamed, $cpu_package, $cpu_broadcom, $cpu_amd);
my $fh = "SENSORS";
# Examples https://gist.github.com/547451c9ca376b2d18f9bb8d3748276c
# &open_execute_command($fh, "cat /tmp/.webmin/sensors /dev/null", 1);
&open_execute_command($fh, "sensors /dev/null", 1);
while (<$fh>) {
# Buffer output for later use
push(@sensors, $_);
# CPU full output must have either voltage or fan data
my ($cpu_volt) = $_ =~ /(?|in\d+\s*:\s+([\+\-0-9\.]+)\s+V|cpu\s+core\s+voltage\s*:\s+([0-9\.]+)\s+V)/i;
# CPU fans should be always labeled as 'cpu fan' or 'cpu_fan' or 'cpufan'
# and/or 'cpu fan 1', 'cpu_fan1', 'cpufan1', 'cpu_fan 2', 'cpu_fan2',
# 'cpufan2' etc.
my ($cpu_fan_num, $cpu_fan_rpm) =
$_ =~ /(?|^\s*cpu[_ ]?fan(?:[_ ]?(\d+))?\s*:\s*(\d+)\s*rpm)/i;
$cpu_fan_num //= 1 if (defined($cpu_fan_rpm));
$cpu++ if ($cpu_volt || $cpu_fan_num);
# First just store fan data for any device if any
push(@fans,
{ 'fan' => &trim($cpu_fan_num),
'rpm' => $cpu_fan_rpm
}
),
push(@fans_all,
{
$cpu_fan_num => @fans
}
) if ($cpu_fan_num);
# AMD CPU Thermisters #1714
if ($cpu && /thermistor\s+[\d]+:\s+[+-]([\d]+)/i) {
my $temp = $ceil->($1);
push(@cpu_thermisters,
{ 'core' => scalar(@cpu_thermisters) + 1,
'temp' => $temp
}) if ($temp);
}
# CPU package
($cpu_package) = $_ =~ /(?|(package\s+id\s+[\d]+)|(coretemp-[a-z]+-[\d]+))/i
if (!$cpu_package);
# Standard outputs
if ($cpu_package) {
# Common CPU multi
if (/Core\s+(\d+):\s+([\+\-][0-9\.]+)/) {
# Prioritize package core temperature
# data over motherboard but keep fans
@cpu = (), $cpu_aux++
if ($cpu_aux & 1 && grep { $_->{'core'} eq $1 } @cpu);
push(@cpu,
{ 'core' => $1,
'temp' => $ceil->($2)
});
}
# Common CPU single
elsif (/CPU:\s+([\+\-][0-9\.]+)/) {
push(@cpu,
{ 'core' => 0,
'temp' => $ceil->($1)
});
}
}
# Non-standard outputs
else {
# Auxiliary CPU temperature and fans were already captured
next if ($cpu_aux && !$cpu_unnamed);
# CPU types
($cpu_broadcom) = $_ =~ /cpu_thermal-virtual-[\d]+/i if (!$cpu_broadcom);
($cpu_amd) = $_ =~ /\w[\d]{2}temp-pci/i if (!$cpu_amd);
# Full CPU output #1253
if ($cpu) {
# Standard output
if (/temp(\d+):\s+([\+][0-9\.]+).*?[Cc]\s+.*?[=+].*?\)/) {
push(@cpu,
{ 'core' => (int($1) - 1),
'temp' => $ceil->($2)
});
}
# Approx from motherboard sensor as last resort
elsif (/(cputin|cpu\s+temp)\s*:\s+([\+][0-9\.]+).*?[Cc]\s+.*?[=+].*?\)/i ||
/(cpu\s+temperature)\s*:\s+([\+][0-9\.]+).*?[Cc]/i) {
push(@cpu,
{ 'core' => 0,
'temp' => $ceil->($2)
});
}
}
# Broadcom
elsif ($cpu_broadcom) {
if (/temp(\d+):\s+([\+\-][0-9\.]+)/) {
push(@cpu,
{ 'core' => int($1),
'temp' => $ceil->($2)
});
$cpu_broadcoms++;
}
elsif (/cpu\s+temp(.*?):\s+([\+\-][0-9\.]+)/i) {
$cpu_unnamed++;
push(@cpu,
{ 'core' => $cpu_unnamed,
'temp' => $ceil->($2)
});
$cpu_broadcoms++;
}
}
# AMD
elsif ($cpu_amd) {
# Like in sourceforge.net/p/webadmin/discussion/600155/thread/a9d8fe19c0
if (/Tdie:\s+([\+\-][0-9\.]+)/) {
push(@cpu,
{ 'core' => 0,
'temp' => $ceil->($1),
});
}
# Like in #1481 #1484
elsif (/temp(\d+):\s+([\+\-][0-9\.]+).*?[Cc]\s+.*?[=+].*?\)/) {
push(@cpu,
{ 'core' => ($ceil->($1) - 1),
'temp' => $ceil->($2),
});
}
# Like in #2140
elsif (/Tctl:\s*([\+\-][0-9\.]+)/) {
push(@cpu,
{ 'core' => 0,
'temp' => $ceil->($1),
});
}
}
# New line represents another device
if (/^\s*$/) {
# Do we have CPU data already, if so add fans
# output, if any, and continue checking for
# priority package id core temperature data
$cpu_aux++ if (@cpu);
next if ($cpu_aux);
# Reset cpu and fans and continue
@cpu = ();
@fans = ();
$cpu = 0;
$cpu_broadcom = 0;
$cpu_amd = 0;
}
}
}
close($fh);
}
@cpu = @cpu_thermisters
if (!@cpu && @cpu_thermisters);
# Fix to remove cannot detect
# package temperatures (178)
if (@cpu) {
@cpu = grep {$_->{'temp'} != 178} @cpu;
}
# Fix output when FAN data
# precedes CPU data (/t/125292)
if (!@fans && @cpu && @fans_all &&
$cpu_broadcoms && @cpu == @fans_all) {
foreach my $fan (@fans_all) {
foreach my $cpu (@cpu) {
push(@fans, $fan->{$cpu->{'core'}})
if ($fan->{$cpu->{'core'}});
}
}
}
# Fall back logic for CPU temperature and fans spread over multiple
# devices like Raspberry Pi #2517 and #2539 #2545
if (@cpu || !@fans) {
# - Look for least two ISA voltage rails anywhere
# - See a CPU temp under cpu_thermal
# - Optionally grab a fan RPM under *fan-isa-*
my $can_fallback =
(!@cpu && (grep { /^\s*cpu_thermal/i } @sensors)) ||
(@cpu && !@fans && (grep { /fan-isa-\d+/i } @sensors));
return (\@cpu, \@fans) if (!$can_fallback);
my ($chip, $bus); # isa|pci|platform|virtual
my $isa_volt;
my ($cpu_temp, $fan_rpm);
for (@sensors) {
# Chip header
if (/^([A-Za-z0-9_+\-]+)-(isa|pci|platform|virtual)-[\w:]+\s*$/) {
$chip = lc $1;
$bus = lc $2;
next;
}
# Count real voltage rails
if (defined $bus && $bus eq 'isa' &&
/\bin\d+\s*:\s*([+\-]?[0-9]+(?:\.[0-9]+)?)\s*V\b/i) {
$isa_volt++;
next;
}
# CPU temperature
if (defined $chip && $chip =~ /^cpu_thermal/i &&
/\b(?:CPU(?:\s*Temp)?|temp\d+)\s*:\s*([+\-]?[0-9]+(?:\.[0-9]+)?)\s*°?C\b/i) {
$cpu_temp //= $1;
next;
}
# Fan RPM
if (defined $chip && $chip =~ /fan$/i &&
/\b(?:cpu[_ ]?fan(?:\s*\d+)?|fan\d+)\s*:\s*(\d+)\s*rpm\b/i) {
my $rpm = $1 + 0;
$fan_rpm = $rpm if (!$fan_rpm || $rpm > $fan_rpm);
next;
}
}
# Update only what's missing
push(@cpu, { 'core' => 1, 'temp' => $ceil->($cpu_temp) })
if (!@cpu && defined $cpu_temp && $isa_volt >= 2);
push(@fans, { 'fan' => 1, 'rpm' => $fan_rpm })
if (!@fans && defined $fan_rpm);
}
return (\@cpu, \@fans);
}
# get_cpu_io_usage()
# Returns a list of "us", "sy", "id", "wa", "st", "bi", "bo" that match `vmstat`
# output by using /proc with much lower overhead
sub get_cpu_io_usage
{
# Read CPU counters from /proc/stat, the first "cpu" line
my $read_cpu = sub {
open(my $fh, '<', '/proc/stat') or return;
my $line = <$fh>;
close($fh);
return unless defined $line && $line =~ /^cpu\s+/;
my @v = split /\s+/, $line; shift @v;
push @v, (0) x (8-@v) if @v < 8;
return @v[0..7];
};
# Read pgpgin/pgpgout from /proc/vmstat (in KB). Note, that all modern kernels,
# /proc/vmstat pgpgin/pgpgout are KiB (scale=1); not as *pages*, so no need to
# convert deltas
my $read_io = sub {
open(my $fh, '<', '/proc/vmstat') or return (undef, undef);
my ($in, $out);
while (my $l = <$fh>) {
$in = $1 if !defined $in && $l =~ /^pgpgin\s+(\d+)/;
$out = $1 if !defined $out && $l =~ /^pgpgout\s+(\d+)/;
last if defined $in && defined $out;
}
close($fh);
return ($in, $out); # KB on kernels 2.6.18+; no conversion needed
};
# Sample A
my @cb = $read_cpu->() or return;
my ($pgin_b, $pgout_b) = $read_io->();
# Sleep half a second
select(undef, undef, undef, 0.5);
# Sample B
my @ca = $read_cpu->() or return;
my ($pgin_a, $pgout_a) = $read_io->();
# CPU percentages as in vmstat
my @d = map { $ca[$_] - $cb[$_] } 0..7;
for (@d) { $_ = 0 if $_ < 0 }
my $tot = 0; $tot += $_ for @d[0..7];
return if !$tot;
# Calculate percentages
my $us = int( (($d[0] + $d[1]) / $tot) * 100 ); # user+nice
my $sy = int( (($d[2] + $d[5] + $d[6]) / $tot) * 100 ); # system+irq+softirq
my $id = int( ( $d[3] / $tot ) * 100 ); # idle
my $wa = int( ( $d[4] / $tot ) * 100 ); # iowait
my $st = int( ( $d[7] / $tot ) * 100 ); # steal
# Calculate bi/bo in KiB/s over half a second
my ($bi, $bo) = (0, 0);
$bi = int( (($pgin_a // 0) - ($pgin_b // 0)) / 0.5 );
$bo = int( (($pgout_a // 0) - ($pgout_b // 0)) / 0.5 );
return ($us, $sy, $id, $wa, $st, $bi, $bo);
}
# has_disk_stats()
# Returns 1 if disk I/O stats are available
sub has_disk_stats
{
return 1;
}
# has_network_stats()
# Returns 1 if network I/O stats are available
sub has_network_stats
{
return 1;
}
1;