95 lines
2.0 KiB
Raku
Executable File
95 lines
2.0 KiB
Raku
Executable File
#!/usr/bin/perl
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#
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# count_pf.pl -- run lsof in repeat mode and count processes and
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# files
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sub interrupt { print "\n"; exit 0; }
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$RPT = 15; # lsof repeat time
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# Set path to lsof.
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if (($LSOF = &isexec("../lsof")) eq "") { # Try .. first
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if (($LSOF = &isexec("lsof")) eq "") { # Then try . and $PATH
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print "can't execute $LSOF\n"; exit 1
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}
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}
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# Read lsof -nPF0 output repeatedly from a pipe.
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$| = 1; # unbuffer output
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$SIG{'INT'} = 'interrupt'; # catch interrupt
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$proc = $files = $tcp = $udp = 0;
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$progress="/";
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open(P, "$LSOF -nPF0 -r $RPT|") || die "can't open pipe to $LSOF\n";
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LSOF_LINE:
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while (<P>) {
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chop;
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if (/^m/) {
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# A marker line signals the end of an lsof repetition.
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printf "%s Processes: %5d, Files: %6d, TCP: %6d, UDP: %6d\r",
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$progress, $proc, $files, $tcp, $udp;
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$proc = $files = $tcp = $udp = 0;
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if ($progress eq "/") { $progress = "\\"; } else { $progress = "/"; }
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next LSOF_LINE;
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}
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if (/^p/) {
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# Count process.
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$proc++;
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next LSOF_LINE;
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}
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if (/^f/) {
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# Count files.
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$files++;
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@F = split("\0", $_, 999);
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foreach $i (0 .. ($#F - 1)) {
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# Search for protocol field.
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if ($F[$i] =~ /^P(.*)/) {
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# Count instances of TCP and UDP protocols.
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if ($1 eq "TCP") { $tcp++; }
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elsif ($1 eq "UDP") { $udp++; }
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next LSOF_LINE;
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}
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}
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}
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}
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## isexec($path) -- is $path executable
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#
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# $path = absolute or relative path to file to test for executabiity.
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# Paths that begin with neither '/' nor '.' that arent't found as
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# simple references are also tested with the path prefixes of the
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# PATH environment variable.
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sub
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isexec {
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my ($path) = @_;
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my ($i, @P, $PATH);
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$path =~ s/^\s+|\s+$//g;
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if ($path eq "") { return(""); }
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if (($path =~ m#^[\/\.]#)) {
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if (-x $path) { return($path); }
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return("");
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}
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$PATH = $ENV{PATH};
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@P = split(":", $PATH);
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for ($i = 0; $i <= $#P; $i++) {
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if (-x "$P[$i]/$path") { return("$P[$i]/$path"); }
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}
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return("");
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}
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