ebcccbd358
such as open files, current directories, mmaped files, etc. This is inherently unportable, but it's easy to adapt this script to other platforms. Currently we call `lsof' and try to read various bits in /proc/NNN. The goal is to prevent the garbage collector from removing store paths that are no longer reachable from a permanent root but that are still in use (for instance, after the user has done "nix-env -e" on a running program).
58 lines
1.2 KiB
Perl
58 lines
1.2 KiB
Perl
#! @perl@ -w
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use strict;
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my $procDir = "/proc";
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sub readProc {
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return unless -d $procDir;
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opendir DIR, $procDir or return;
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foreach my $name (readdir DIR) {
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next unless $name =~ /^\d+$/;
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my $process = "$procDir/$name";
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#print STDERR "=== $process\n";
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my $target;
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print "$target\n" if $target = readlink "$process/exe";
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print "$target\n" if $target = readlink "$process/cwd";
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if (opendir FDS, "$process/fd") {
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foreach my $name (readdir FDS) {
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$target = readlink "$process/fd/$name";
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print "$target\n" if $target && substr($target, 0, 1) eq "/";
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}
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closedir FDS;
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}
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if (open MAP, "<$process/maps") {
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while (<MAP>) {
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next unless /^ \s* \S+ \s+ \S+ \s+ \S+ \s+ \S+ \s+ \S+ \s+ (\/\S+) \s* $/x;
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print "$1\n";
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}
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close MAP;
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}
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}
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closedir DIR;
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}
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sub lsof {
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return unless open LSOF, "lsof -b -w -F n |";
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while (<LSOF>) {
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next unless /^n (\/ .*)$/x;
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print $1, "\n";
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}
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close LSOF;
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}
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readProc;
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lsof;
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