117 lines
4.1 KiB
Plaintext
117 lines
4.1 KiB
Plaintext
#!@GUILE@ -ds
|
|
!#
|
|
;;; GNU Guix --- Functional package management for GNU
|
|
;;; Copyright © 2012 Ludovic Courtès <ludo@gnu.org>
|
|
;;;
|
|
;;; This file is part of GNU Guix.
|
|
;;;
|
|
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
|
;;; under the terms of the GNU General Public License as published by
|
|
;;; the Free Software Foundation; either version 3 of the License, or (at
|
|
;;; your option) any later version.
|
|
;;;
|
|
;;; GNU Guix is distributed in the hope that it will be useful, but
|
|
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;;; GNU General Public License for more details.
|
|
;;;
|
|
;;; You should have received a copy of the GNU General Public License
|
|
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
;;;
|
|
;;; List files being used at run time; these files are garbage collector
|
|
;;; roots. This is equivalent to `find-runtime-roots.pl' in Nix.
|
|
;;;
|
|
|
|
(use-modules (ice-9 ftw)
|
|
(ice-9 regex)
|
|
(ice-9 rdelim)
|
|
(ice-9 popen)
|
|
(srfi srfi-1)
|
|
(srfi srfi-26))
|
|
|
|
(define %proc-directory
|
|
;; Mount point of Linuxish /proc file system.
|
|
"/proc")
|
|
|
|
(define (proc-file-roots dir file)
|
|
"Return a one-element list containing the file pointed to by DIR/FILE,
|
|
or the empty list."
|
|
(or (and=> (false-if-exception (readlink (string-append dir "/" file)))
|
|
list)
|
|
'()))
|
|
|
|
(define proc-exe-roots (cut proc-file-roots <> "exe"))
|
|
(define proc-cwd-roots (cut proc-file-roots <> "cwd"))
|
|
|
|
(define (proc-fd-roots dir)
|
|
"Return the list of store files referenced by DIR, which is a
|
|
/proc/XYZ directory."
|
|
(let ((dir (string-append dir "/fd")))
|
|
(filter-map (lambda (file)
|
|
(let ((target (false-if-exception
|
|
(readlink (string-append dir "/" file)))))
|
|
(and target
|
|
(string-prefix? "/" target)
|
|
target)))
|
|
(scandir dir string->number))))
|
|
|
|
(define (proc-maps-roots dir)
|
|
"Return the list of store files referenced by DIR, which is a
|
|
/proc/XYZ directory."
|
|
(define %file-mapping-line
|
|
(make-regexp "^.*[[:blank:]]+/([^ ]+)$"))
|
|
|
|
(call-with-input-file (string-append dir "/maps")
|
|
(lambda (maps)
|
|
(let loop ((line (read-line maps))
|
|
(roots '()))
|
|
(cond ((eof-object? line)
|
|
roots)
|
|
((regexp-exec %file-mapping-line line)
|
|
=>
|
|
(lambda (match)
|
|
(let ((file (string-append "/"
|
|
(match:substring match 1))))
|
|
(loop (read-line maps)
|
|
(cons file roots)))))
|
|
(else
|
|
(loop (read-line maps) roots)))))))
|
|
|
|
(define (lsof-roots)
|
|
"Return the list of roots as found by calling `lsof'."
|
|
(catch 'system
|
|
(lambda ()
|
|
(let ((pipe (open-pipe* OPEN_READ "lsof" "-n" "-w" "-F" "n")))
|
|
(define %file-rx
|
|
(make-regexp "^n/(.*)$"))
|
|
|
|
(let loop ((line (read-line pipe))
|
|
(roots '()))
|
|
(cond ((eof-object? line)
|
|
(begin
|
|
(close-pipe pipe)
|
|
roots))
|
|
((regexp-exec %file-rx line)
|
|
=>
|
|
(lambda (match)
|
|
(loop (read-line pipe)
|
|
(cons (string-append "/"
|
|
(match:substring match 1))
|
|
roots))))
|
|
(else
|
|
(loop (read-line pipe) roots))))))
|
|
(lambda _
|
|
'())))
|
|
|
|
(let ((proc (format #f "~a/~a" %proc-directory (getpid))))
|
|
(for-each (cut simple-format #t "~a~%" <>)
|
|
(delete-duplicates
|
|
(let ((proc-roots (if (file-exists? proc)
|
|
(append (proc-exe-roots proc)
|
|
(proc-cwd-roots proc)
|
|
(proc-fd-roots proc)
|
|
(proc-maps-roots proc))
|
|
'())))
|
|
(append proc-roots (lsof-roots))))))
|