1 files changed, 79 insertions, 0 deletions
diff --git a/scripts/find-runtime-roots.pl.in b/scripts/find-runtime-roots.pl.in
new file mode 100755
index 000000000000..e1a2dde556b6
--- /dev/null
+++ b/scripts/find-runtime-roots.pl.in
@@ -0,0 +1,79 @@
+#! @perl@ -w @perlFlags@
+
+use strict;
+use Nix::Utils;
+use Nix::Config;
+
+
+sub readProc {
+    return unless -d "/proc";
+
+    opendir DIR, "/proc" or return;
+
+    foreach my $name (readdir DIR) {
+        next unless $name =~ /^\d+$/;
+
+        my $process = "/proc/$name";
+
+        #print STDERR "=== $process\n";
+
+        my $target;
+        print "$target\n" if $target = readlink "$process/exe";
+        print "$target\n" if $target = readlink "$process/cwd";
+
+        if (opendir FDS, "$process/fd") {
+            foreach my $name (readdir FDS) {
+                $target = readlink "$process/fd/$name";
+                print "$target\n" if $target && substr($target, 0, 1) eq "/";
+            }
+            closedir FDS;
+        }
+
+        if (open MAP, "<$process/maps") {
+            while (<MAP>) {
+                next unless /^ \s* \S+ \s+ \S+ \s+ \S+ \s+ \S+ \s+ \S+ \s+ (\/\S+) \s* $/x;
+                print "$1\n";
+            }
+            close MAP;
+        }
+
+        # Get all store paths that appear in the environment of this process.
+        eval {
+            my $env = Nix::Utils::readFile "$process/environ";
+            my @matches = $env =~ /\Q$Nix::Config::storeDir\E\/[0-9a-z]+[0-9a-zA-Z\+\-\._\?=]*/g;
+            print "$_\n" foreach @matches;
+        }
+    }
+
+    closedir DIR;
+}
+
+
+sub lsof {
+    return unless open LSOF, "lsof -n -w -F n 2> /dev/null |";
+
+    while (<LSOF>) {
+        next unless /^n (\/ .*)$/x;
+        print $1, "\n";
+    }
+
+    close LSOF;
+}
+
+
+readProc;
+lsof;
+
+
+sub printFile {
+    my ($fn) = @_;
+    if (-e $fn) {
+        print Nix::Utils::readFile($fn), "\n";
+    }
+}
+
+
+# This is rather NixOS-specific, so it probably shouldn't be here.
+printFile "/proc/sys/kernel/modprobe";
+printFile "/proc/sys/kernel/fbsplash";
+printFile "/proc/sys/kernel/poweroff_cmd";