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fts: close parent dir FD before returning from post-traversal fts_read The problem: the fts-using "mkdir -p A/B; rm -rf A" would attempt to unlink A, even though an FD open on A remained. This is suboptimal (holding a file descriptor open longer than needed), but otherwise not a problem on Unix-like kernels. However, on Cygwin with certain Novell file systems, (see http://cygwin.com/ml/cygwin/2011-10/msg00365.html), that represents a real problem: it causes the removal of A to fail with e.g., "rm: cannot remove `A': Device or resource busy" fts visits each directory twice and keeps a cache (fts_fd_ring) of directory file descriptors. After completing the final, FTS_DP, visit of a directory, RESTORE_INITIAL_CWD intended to clear the FD cache, but then proceeded to add a new FD to it via the subsequent FCHDIR (which calls cwd_advance_fd and i_ring_push). Before, the final file descriptor would be closed only via fts_close's call to fd_ring_clear. Now, it is usually closed earlier, via the final FTS_DP-returning fts_read call. * lib/fts.c (restore_initial_cwd): New function, converted from the macro. Call fd_ring_clear *after* FCHDIR, not before it. Update callers. Reported by Franz Sirl via the above URL, with analysis by Eric Blake in http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/28739
author Jim Meyering <meyering@redhat.com>
date Sun, 23 Oct 2011 22:42:25 +0200
parents 4eeab6ee310c
children 8250f2777afc
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The following packages appear to be using gnulib and gnulib-tool:

  CSSC            http://git.savannah.gnu.org/cgit/cssc.git
  Net::CDP        http://search.cpan.org/src/MCHAPMAN/Net-CDP-0.09/libcdp/
  OPeNDAP         http://scm.opendap.org:8090/svn/trunk/
  acct            http://cvs.sv.gnu.org/viewcvs/acct/acct/
  anubis          http://cvs.sv.gnu.org/viewcvs/anubis/anubis/
  augeas          http://augeas.net/
  autobuild       http://josefsson.org/autobuild/
  barcode         http://git.sv.gnu.org/cgit/barcode.git/
  bison           http://git.sv.gnu.org/gitweb/?p=bison.git
  clisp           http://clisp.cvs.sourceforge.net/clisp/clisp/
  coreutils       http://git.sv.gnu.org/gitweb/?p=coreutils.git
  cpio            http://cvs.sv.gnu.org/viewcvs/cpio/cpio/
  cvs             http://cvs.sv.gnu.org/viewcvs/cvs/ccvs/
  cvsps           http://sourceforge.net/projects/cvsps/
  diffutils       http://git.sv.gnu.org/cgit/diffutils.git/
  febootstrap     http://people.redhat.com/~rjones/febootstrap/
  findutils       http://cvs.sv.gnu.org/viewcvs/findutils/findutils/
  gcal            http://git.savannah.gnu.org/gitweb/?p=gcal.git
  gdb             http://sourceware.org/git/?p=gdb.git;a=summary
  gettext         http://cvs.sv.gnu.org/viewcvs/gettext/gettext/
  gengetopt       http://git.sv.gnu.org/gitweb/?p=gengetopt.git
  gmediaserver    http://cvs.sv.gnu.org/viewvc/gmediaserver/gmediaserver/
  gnuit           http://www.gnu.org/software/gnuit/
                  http://git.savannah.gnu.org/gitweb/?p=gnuit.git
  gnutls          http://cvs.gnupg.org/cgi-bin/viewcvs.cgi/gnutls/?root=GNU+TLS+Library
                  http://git.sv.gnu.org/gitweb/?p=gnutls.git
                  http://repo.or.cz/w/gnutls.git
  gpg             http://cvs.gnupg.org/cgi-bin/viewcvs.cgi/trunk/
  gsasl           http://git.sv.gnu.org/gitweb/?p=gsasl.git
  gss             http://git.sv.gnu.org/gitweb/?p=gss.git
  gtkreindeer     http://git.sv.gnu.org/gitweb/?p=gtkreindeer.git
  gtk-vnc         http://gtk-vnc.codemonkey.ws/hg/outgoing.hg
  grep            http://git.sv.gnu.org/cgit/grep.git/
  guile           http://cvs.sv.gnu.org/viewvc/guile/guile/guile-core/
  gzip            http://git.sv.gnu.org/cgit/gzip.git/
  hello           http://cvs.sv.gnu.org/viewcvs/hello/hello/
  hivex           http://git.annexia.org/?p=hivex.git
  icoutils        http://riva.ucam.org/svn/cjwatson/src/debian/icoutils/trunk/icoutils/
  inetutils       http://cvs.sv.gnu.org/viewcvs/inetutils/inetutils/
  iwhd            http://git.fedorahosted.org/git/?p=iwhd.git
  jugtail         http://cvs.savannah.gnu.org/viewvc/?root=jugtail
  jwhois          http://cvs.sv.gnu.org/viewvc/jwhois/jwhois/
  libdap          http://scm.opendap.org:8090/svn/trunk/libdap/
  libffcall       http://savannah.gnu.org/projects/libffcall/
  libgnupdf       http://cvs.savannah.gnu.org/viewvc/libgnupdf/?root=pdf
  libguestfs      http://libguestfs.org/
  libiconv        http://libiconv.cvs.sourceforge.net/libiconv/libiconv/
  libidn          http://git.sv.gnu.org/gitweb/?p=libidn.git
  libidn2         http://josefsson.org/libidn2/
  libksba         http://cvs.gnupg.org/cgi-bin/viewcvs.cgi/trunk/?root=KSBA
  libntlm         http://git.josefsson.org/?p=libntlm.git;a=summary
  libprelude      https://trac.prelude-ids.org/browser/trunk/libprelude/
  libpreludedb    https://trac.prelude-ids.org/browser/trunk/libpreludedb/
  libtasn1        http://git.savannah.gnu.org/gitweb/?p=libtasn1.git
  libunistring    http://git.sv.gnu.org/gitweb/?p=libunistring.git
  libvirt         http://libvirt.org/
                  http://git.et.redhat.com/?p=libvirt.git;a=summary
  m4              http://git.sv.gnu.org/gitweb/?p=m4.git;a=summary
  mailfromd       http://svn.gnu.org.ua/viewvc/mailfromd/trunk/
  mailutils       http://cvs.sv.gnu.org/viewcvs/mailutils/mailutils/
  man-db          http://www.chiark.greenend.org.uk/~cjwatson/bzr/man-db/trunk/
  miktex          https://svn.sourceforge.net/svnroot/miktex/miktex/trunk
  mini-httpd      http://git.sv.gnu.org/gitweb/?p=mini-httpd.git
  msmtp           http://msmtp.cvs.sourceforge.net/msmtp/msmtp/
  myserver        http://git.sv.gnu.org/gitweb/?p=myserver.git;a=summary
  nagios-plugins  http://nagiosplug.git.sourceforge.net/
  netcf           http://fedorahosted.org/netcf/
  newts           http://svn.arete.cc/newts/trunk/
  OATH Toolkit    http://www.nongnu.org/oath-toolkit/
  octave          http://hg.savannah.gnu.org/hgweb/octave/
  parted          http://git.debian.org/?p=parted/parted.git;a=summary
  patch           http://git.sv.gnu.org/gitweb/?p=patch.git
  prelude-lml     https://trac.prelude-ids.org/browser/trunk/prelude-lml/
  prelude-manager https://trac.prelude-ids.org/browser/trunk/prelude-manager/
  pspp            http://git.sv.gnu.org/gitweb/?p=pspp.git
  radius          http://cvs.sv.gnu.org/viewcvs/radius/radius/
  recutils        http://git.savannah.gnu.org/gitweb/?p=recutils.git
  reindeer        http://git.sv.gnu.org/gitweb/?p=reindeer.git
  rcs             http://git.savannah.gnu.org/cgit/rcs.git
  sed             http://cvs.savannah.gnu.org/viewcvs/sed/?root=sed
  sharutils       http://cvs.savannah.gnu.org/viewvc/sharutils/sharutils/
  shishi          http://git.sv.gnu.org/gitweb/?p=shishi.git
  tar             http://cvs.sv.gnu.org/viewcvs/tar/tar/
  texinfo         http://cvs.sv.gnu.org/viewcvs/texinfo/texinfo/
  tmpwatch        https://fedorahosted.org/tmpwatch/
  vc-dwim         http://git.sv.gnu.org/gitweb/?p=vc-dwim.git
  wget            http://hg.addictivecode.org/wget/mainline/
  wydawca         http://svn.gnu.org.ua/viewvc/wydawca/trunk/
  wyslij-po       http://svn.gnu.org.ua/viewvc/wyslij-po/trunk/
  zile            http://www.gnu.org/software/zile/

The following packages are using gnulib without gnulib-tool:

  libtool         http://cvs.sv.gnu.org/viewcvs/libtool/libtool/
  libgcrypt       http://cvs.gnupg.org/cgi-bin/viewcvs.cgi/trunk/?root=Libgcrypt

Articles:

  "Using Gnulib to improve software portability",
  by Diego 'Flameeyes' Pettenò on December 28, 2005,
  http://www.linux.com/articles/50702

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Copyright (C) 2006-2011 Free Software Foundation, Inc.

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