47 lines
1.0 KiB
Perl
47 lines
1.0 KiB
Perl
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use Data::Dumper;
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sub file_read_firstline {
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my ($filename) = @_;
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my $fh = IO::File->new ($filename, "r");
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return undef if !$fh;
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my $res = <$fh>;
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chomp $res if $res;
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$fh->close;
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return $res;
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}
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sub read_proc_pid_stat {
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my $pid = shift;
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my $statstr = file_read_firstline("/proc/$pid/stat");
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if ($statstr && $statstr =~ m/^$pid \(.*\) (\S) (-?\d+) -?\d+ -?\d+ -?\d+ -?\d+ \d+ \d+ \d+ \d+ \d+ (\d+) (\d+) (-?\d+) (-?\d+) -?\d+ -?\d+ -?\d+ 0 (\d+) (\d+) (-?\d+) \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ -?\d+ -?\d+ \d+ \d+ \d+/) {
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print "$statstr\n";
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print "$7\n";
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print ref \$7, "\n";
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return {
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status => $1,
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ppid => $2,
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utime => $3,
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stime => $4,
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starttime => $7,
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vsize => $8,
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rss => $9 * 4096,
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};
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}
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return undef;
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}
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sub test {
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my %res = read_proc_pid_stat(1);
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print "$res->{starttime}";
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while (my ($k,$v)=each %res){print "$k $v\n"};
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print "@{[$res]}\n";
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foreach my $key ( keys %res ) {
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print $key, " => ", $res->{$key},"\n";
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}
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}
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test()
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