File Manager

XYZ File Manager

Current Path: /usr/bin

📁 ..
📁 X11
📄 [(66.89 KB)
📄 ab(58.42 KB)
📄 addpart(30.31 KB)
📄 apt(18.31 KB)
📄 apt-cache(86.38 KB)
📄 apt-cdrom(22.38 KB)
📄 apt-config(26.31 KB)
📄 apt-get(50.38 KB)
📄 apt-key(27.32 KB)
📄 apt-mark(58.38 KB)
📄 arch(42.86 KB)
📄 awk(154.66 KB)
📄 b2sum(58.98 KB)
📄 base32(46.89 KB)
📄 base64(46.89 KB)
📄 basename(42.83 KB)
📄 basenc(54.89 KB)
📄 bash(1.21 MB)
📄 bashbug(6.7 KB)
📄 bdftopcf(42.45 KB)
📄 bdftruncate(10.22 KB)
📄 busctl(90.5 KB)
📄 c_rehash(6.68 KB)
📄 captoinfo(90.34 KB)
📄 cat(42.98 KB)
📄 certbot(958 B)
📄 chage(78.49 KB)
📄 chardet(221 B)
📄 chardetect(221 B)
📄 chattr(14.24 KB)
📄 chcon(67.11 KB)
📄 checkgid(14.23 KB)
📄 chfn(61.2 KB)
📄 chgrp(67.05 KB)
📄 chmod(62.98 KB)
📄 choom(54.31 KB)
📄 chown(71.05 KB)
📄 chrt(66.31 KB)
📄 chsh(51.64 KB)
📄 cksum(139.05 KB)
📄 clear(14.24 KB)
📄 clear_console(14.15 KB)
📄 cmp(50.95 KB)
📄 comm(46.92 KB)
📄 corelist(15.01 KB)
📄 cp(147.61 KB)
📄 cpan(8.16 KB)
📄 cpan5.36-x86_64-linux-gnu(8.18 KB)
📄 csplit(119.17 KB)
📄 ctstat(26.59 KB)
📄 cut(46.98 KB)
📄 dash(122.7 KB)
📄 date(119.05 KB)
📄 dbus-cleanup-sockets(14.22 KB)
📄 dbus-daemon(238.56 KB)
📄 dbus-monitor(26.23 KB)
📄 dbus-run-session(14.23 KB)
📄 dbus-send(30.22 KB)
📄 dbus-update-activation-environment(14.22 KB)
📄 dbus-uuidgen(14.22 KB)
📄 dd(87.15 KB)
📄 deb-systemd-helper(23.79 KB)
📄 deb-systemd-invoke(6.09 KB)
📄 debconf(2.79 KB)
📄 debconf-apt-progress(11.27 KB)
📄 debconf-communicate(608 B)
📄 debconf-copydb(1.68 KB)
📄 debconf-escape(647 B)
📄 debconf-set-selections(2.92 KB)
📄 debconf-show(1.78 KB)
📄 delpart(30.31 KB)
📄 df(99.8 KB)
📄 dialog(247.85 KB)
📄 diff(151.58 KB)
📄 diff3(67.14 KB)
📄 dir(147.8 KB)
📄 dircolors(50.92 KB)
📄 dirname(38.83 KB)
📄 dmesg(86.58 KB)
📄 dnsdomainname(22.15 KB)
📄 domainname(22.15 KB)
📄 dpkg(310.64 KB)
📄 dpkg-deb(166.52 KB)
📄 dpkg-divert(154.55 KB)
📄 dpkg-maintscript-helper(20.71 KB)
📄 dpkg-query(158.58 KB)
📄 dpkg-realpath(4.09 KB)
📄 dpkg-split(126.48 KB)
📄 dpkg-statoverride(62.33 KB)
📄 dpkg-trigger(86.48 KB)
📄 du(171.33 KB)
📄 dvipdf(1007 B)
📄 echo(42.83 KB)
📄 editor(3.48 MB)
📄 egrep(41 B)
📄 enc2xs(40.96 KB)
📄 encguess(3 KB)
📄 env(47.4 KB)
📄 eps2eps(639 B)
📄 ex(3.48 MB)
📄 expand(42.92 KB)
📄 expiry(30.45 KB)
📄 expr(115.05 KB)
📄 factor(83.2 KB)
📄 faillog(22.53 KB)
📄 fallocate(34.31 KB)
📄 false(34.83 KB)
📄 fcgistarter(14.23 KB)
📄 fgrep(41 B)
📄 fincore(34.36 KB)
📄 find(219.58 KB)
📄 findmnt(83.59 KB)
📄 flock(34.39 KB)
📄 fmt(46.89 KB)
📄 fold(42.89 KB)
📄 fonttosfnt(34.41 KB)
📄 free(26.3 KB)
📄 fuser(39.83 KB)
📄 getconf(26.5 KB)
📄 getent(35.47 KB)
📄 getopt(34.31 KB)
📄 ghostscript(14.23 KB)
📄 gpasswd(86.42 KB)
📄 gpgv(463 KB)
📄 grep(198.39 KB)
📄 groups(42.89 KB)
📄 gs(14.23 KB)
📄 gsbj(350 B)
📄 gsdj(352 B)
📄 gsdj500(352 B)
📄 gslj(353 B)
📄 gslp(350 B)
📄 gsnd(277 B)
📄 gunzip(2.29 KB)
📄 gzexe(6.3 KB)
📄 gzip(95.84 KB)
📄 h2ph(28.54 KB)
📄 h2xs(59.51 KB)
📄 hardlink(50.39 KB)
📄 head(46.95 KB)
📄 helpztags(2.46 KB)
📄 hostid(38.83 KB)
📄 hostname(22.15 KB)
📄 hostnamectl(30.38 KB)
📄 htcacheclean(34.24 KB)
📄 htdbm(26.23 KB)
📄 htdigest(14.23 KB)
📄 htpasswd(26.23 KB)
📄 i386(26.58 KB)
📄 iconv(63.13 KB)
📄 id(47.02 KB)
📄 infocmp(62.31 KB)
📄 infotocap(90.34 KB)
📄 install(155.8 KB)
📄 instmodsh(4.27 KB)
📄 ionice(34.31 KB)
📄 ip(674.82 KB)
📄 ipcmk(34.38 KB)
📄 ipcrm(34.31 KB)
📄 ipcs(74.31 KB)
📄 ischroot(14.32 KB)
📄 join(54.98 KB)
📄 journalctl(74.64 KB)
📄 json_pp(4.88 KB)
📄 kernel-install(12.75 KB)
📄 kill(22.3 KB)
📄 killall(31.95 KB)
📄 last(50.31 KB)
📄 lastb(50.31 KB)
📄 lastlog(31.75 KB)
📄 lcf(7.6 KB)
📄 ld.so(205.96 KB)
📄 ldd(5.28 KB)
📄 letsencrypt(958 B)
📄 libnetcfg(15.41 KB)
📄 link(38.83 KB)
📄 linux32(26.58 KB)
📄 linux64(26.58 KB)
📄 ln(71.12 KB)
📄 lnstat(26.59 KB)
📄 locale(46.16 KB)
📄 localectl(26.38 KB)
📄 localedef(291.91 KB)
📄 logger(54.9 KB)
📄 login(51.78 KB)
📄 loginctl(58.48 KB)
📄 logname(38.83 KB)
📄 logresolve(14.24 KB)
📄 ls(147.8 KB)
📄 lsattr(14.24 KB)
📄 lsb_release(2.59 KB)
📄 lsblk(202.31 KB)
📄 lscpu(126.31 KB)
📄 lsfd(120.3 KB)
📄 lsipc(98.31 KB)
📄 lsirq(34.48 KB)
📄 lslocks(70.7 KB)
📄 lslogins(94.31 KB)
📄 lsmem(66.31 KB)
📄 lsns(82.31 KB)
📄 mawk(154.66 KB)
📄 mcookie(34.38 KB)
📄 md5sum(50.95 KB)
📄 md5sum.textutils(50.95 KB)
📄 mesg(18.3 KB)
📄 mkdir(95.27 KB)
📄 mkfifo(67.17 KB)
📄 mkfontdir(65 B)
📄 mkfontscale(39.05 KB)
📄 mknod(71.2 KB)
📄 mktemp(42.92 KB)
📄 more(58.31 KB)
📄 mount(58.3 KB)
📄 mountpoint(18.3 KB)
📄 mv(139.62 KB)
📄 namei(34.31 KB)
📄 nawk(154.66 KB)
📄 netstat(151.66 KB)
📄 networkctl(106.38 KB)
📄 newgrp(47.75 KB)
📄 nice(42.86 KB)
📄 nisdomainname(22.15 KB)
📄 nl(111.11 KB)
📄 nohup(42.89 KB)
📄 normalizer(244 B)
📄 nproc(42.89 KB)
📄 nsenter(34.54 KB)
📄 nstat(104.45 KB)
📄 numfmt(67.02 KB)
📄 od(79.02 KB)
📄 openssl(953.26 KB)
📄 pager(58.31 KB)
📄 paperconf(14.34 KB)
📄 partx(118.31 KB)
📄 passwd(66.65 KB)
📄 paste(42.89 KB)
📄 pathchk(42.86 KB)
📄 pdb3(62.4 KB)
📄 pdb3.11(62.4 KB)
📄 pdf2dsc(698 B)
📄 pdf2ps(909 B)
📄 peekfd(14.5 KB)
📄 perl(3.63 MB)
📄 perl5.36-x86_64-linux-gnu(14.41 KB)
📄 perl5.36.0(3.63 MB)
📄 perlbug(44.12 KB)
📄 perldoc(125 B)
📄 perlivp(10.61 KB)
📄 perlthanks(44.12 KB)
📄 pf2afm(498 B)
📄 pfbtopfa(516 B)
📄 pgrep(34.42 KB)
📄 phar(14.88 KB)
📄 phar.phar(14.88 KB)
📄 phar.phar8.2(14.88 KB)
📄 phar8.2(14.88 KB)
📄 phar8.2.phar(14.88 KB)
📄 php(5.4 MB)
📄 php8.2(5.4 MB)
📄 piconv(8.16 KB)
📄 pidof(26.31 KB)
📄 pidwait(34.42 KB)
📄 pinky(47.05 KB)
📄 pkill(34.42 KB)
📄 pl2pm(4.43 KB)
📄 pldd(22.69 KB)
📄 pmap(34.34 KB)
📄 pod2html(4.04 KB)
📄 pod2man(14.68 KB)
📄 pod2text(10.55 KB)
📄 pod2usage(4.01 KB)
📄 podchecker(3.57 KB)
📄 pphs(404 B)
📄 pr(79.11 KB)
📄 printafm(395 B)
📄 printenv(34.83 KB)
📄 printf(62.92 KB)
📄 prlimit(38.83 KB)
📄 prove(13.34 KB)
📄 prtstat(18.57 KB)
📄 ps(142.93 KB)
📄 ps2ascii(631 B)
📄 ps2epsi(1.23 KB)
📄 ps2pdf(272 B)
📄 ps2pdf12(215 B)
📄 ps2pdf13(215 B)
📄 ps2pdf14(215 B)
📄 ps2pdfwr(1.05 KB)
📄 ps2ps(647 B)
📄 ps2ps2(669 B)
📄 ps2txt(631 B)
📄 pslog(14.45 KB)
📄 pstree(35.78 KB)
📄 pstree.x11(35.78 KB)
📄 ptar(3.48 KB)
📄 ptardiff(2.58 KB)
📄 ptargrep(4.29 KB)
📄 ptx(135.23 KB)
📄 pwd(42.92 KB)
📄 pwdx(14.3 KB)
📄 py3clean(7.63 KB)
📄 py3compile(13 KB)
📄 py3versions(12.52 KB)
📄 pydoc3(79 B)
📄 pydoc3.11(79 B)
📄 pygettext3(23.67 KB)
📄 pygettext3.11(23.67 KB)
📄 python3(6.52 MB)
📄 python3.11(6.52 MB)
📄 rbash(1.21 MB)
📄 rdma(180.6 KB)
📄 readlink(50.89 KB)
📄 realpath(50.92 KB)
📄 rename.ul(22.3 KB)
📄 renice(14.3 KB)
📄 reset(30.24 KB)
📄 resizepart(70.31 KB)
📄 rev(14.3 KB)
📄 rgrep(30 B)
📄 rm(71.05 KB)
📄 rmdir(54.92 KB)
📄 rotatelogs(26.31 KB)
📄 routel(1.62 KB)
📄 rtstat(26.59 KB)
📄 run-parts(26.91 KB)
📄 runcon(42.95 KB)
📄 rview(3.48 MB)
📄 rvim(3.48 MB)
📄 savelog(10.24 KB)
📄 scp(266.63 KB)
📄 script(70.3 KB)
📄 scriptlive(54.3 KB)
📄 scriptreplay(46.3 KB)
📄 sdiff(55.08 KB)
📄 sed(123.46 KB)
📄 select-editor(2.39 KB)
📄 sensible-browser(1.26 KB)
📄 sensible-editor(1.24 KB)
📄 sensible-pager(565 B)
📄 seq(58.92 KB)
📄 setarch(26.58 KB)
📄 setpriv(78.31 KB)
📄 setsid(14.3 KB)
📄 setterm(46.31 KB)
📄 sftp(282.59 KB)
📄 sg(47.75 KB)
📄 sh(122.7 KB)
📄 sha1sum(54.95 KB)
📄 sha224sum(58.95 KB)
📄 sha256sum(58.95 KB)
📄 sha384sum(62.95 KB)
📄 sha512sum(62.95 KB)
📄 shasum(9.75 KB)
📄 shred(63.14 KB)
📄 shuf(58.98 KB)
📄 skill(30.33 KB)
📄 slabtop(22.37 KB)
📄 sleep(42.86 KB)
📄 slogin(1.07 MB)
📄 snice(30.33 KB)
📄 sort(115.68 KB)
📄 splain(18.99 KB)
📄 split(59.55 KB)
📄 ss(189.14 KB)
📄 ssh(1.07 MB)
📄 ssh-add(518.44 KB)
📄 ssh-agent(474.38 KB)
📄 ssh-argv0(1.42 KB)
📄 ssh-copy-id(12.38 KB)
📄 ssh-keygen(646.44 KB)
📄 ssh-keyscan(622.47 KB)
📄 stat(95.2 KB)
📄 stdbuf(58.92 KB)
📄 streamzip(7.75 KB)
📄 stty(83.02 KB)
📄 su(70.31 KB)
📄 sum(50.96 KB)
📄 sync(38.89 KB)
📄 systemctl(1.29 MB)
📄 systemd(90.38 KB)
📄 systemd-analyze(182.61 KB)
📄 systemd-ask-password(18.48 KB)
📄 systemd-cat(18.38 KB)
📄 systemd-cgls(22.48 KB)
📄 systemd-cgtop(38.4 KB)
📄 systemd-creds(42.61 KB)
📄 systemd-cryptenroll(58.6 KB)
📄 systemd-delta(26.38 KB)
📄 systemd-detect-virt(18.37 KB)
📄 systemd-escape(18.37 KB)
📄 systemd-firstboot(50.59 KB)
📄 systemd-id128(22.37 KB)
📄 systemd-inhibit(22.39 KB)
📄 systemd-machine-id-setup(18.48 KB)
📄 systemd-mount(50.59 KB)
📄 systemd-notify(18.38 KB)
📄 systemd-path(18.37 KB)
📄 systemd-repart(150.69 KB)
📄 systemd-run(58.57 KB)
📄 systemd-socket-activate(26.38 KB)
📄 systemd-stdio-bridge(18.38 KB)
📄 systemd-sysext(42.49 KB)
📄 systemd-sysusers(62.68 KB)
📄 systemd-tmpfiles(110.57 KB)
📄 systemd-tty-ask-password-agent(34.38 KB)
📄 systemd-umount(50.59 KB)
📄 tabs(18.23 KB)
📄 tac(111.05 KB)
📄 tail(75.14 KB)
📄 tar(519.52 KB)
📄 taskset(62.31 KB)
📄 tee(42.95 KB)
📄 tempfile(14.18 KB)
📄 test(58.89 KB)
📄 tic(90.34 KB)
📄 timedatectl(42.37 KB)
📄 timeout(47.49 KB)
📄 tload(18.32 KB)
📄 toe(22.23 KB)
📄 top(131.58 KB)
📄 touch(107.05 KB)
📄 tput(26.27 KB)
📄 tr(54.89 KB)
📄 true(34.83 KB)
📄 truncate(42.89 KB)
📄 tset(30.24 KB)
📄 tsort(54.89 KB)
📄 tty(34.86 KB)
📄 tzselect(14.99 KB)
📄 ucf(40.69 KB)
📄 ucfq(18.91 KB)
📄 ucfr(10.85 KB)
📄 uclampset(62.31 KB)
📄 ucs2any(18.32 KB)
📄 umount(34.3 KB)
📄 uname(42.86 KB)
📄 uncompress(2.29 KB)
📄 unexpand(42.92 KB)
📄 uniq(46.95 KB)
📄 unlink(38.83 KB)
📄 unshare(82.54 KB)
📄 update-alternatives(58.31 KB)
📄 update-mime-database(59.27 KB)
📄 uptime(14.3 KB)
📄 users(38.89 KB)
📄 utmpdump(30.3 KB)
📄 vdir(147.8 KB)
📄 vi(3.48 MB)
📄 view(3.48 MB)
📄 vim(3.48 MB)
📄 vim.basic(3.48 MB)
📄 vimdiff(3.48 MB)
📄 vimtutor(2.1 KB)
📄 vmstat(34.72 KB)
📄 w(22.3 KB)
📄 wall(38.3 KB)
📄 watch(26.71 KB)
📄 wc(51.05 KB)
📄 wdctl(70.34 KB)
📄 wget(527.36 KB)
📄 whereis(30.77 KB)
📄 which(946 B)
📄 which.debianutils(946 B)
📄 who(59.02 KB)
📄 whoami(38.86 KB)
📄 x86_64(26.58 KB)
📄 xargs(70.45 KB)
📄 xdg-user-dir(234 B)
📄 xdg-user-dirs-update(26.16 KB)
📄 xsubpp(5.05 KB)
📄 xxd(18.21 KB)
📄 yes(38.83 KB)
📄 ypdomainname(22.15 KB)
📄 zcat(1.94 KB)
📄 zcmp(1.64 KB)
📄 zdiff(6.31 KB)
📄 zdump(22.52 KB)
📄 zegrep(29 B)
📄 zfgrep(29 B)
📄 zforce(2.03 KB)
📄 zgrep(7.91 KB)
📄 zipdetails(68.55 KB)
📄 zless(2.15 KB)
📄 zmore(1.8 KB)
📄 znew(4.47 KB)

Editing: dpkg-maintscript-helper

#!/bin/sh
#
# Copyright © 2007, 2011-2015 Guillem Jover <guillem@debian.org>
# Copyright © 2010 Raphaël Hertzog <hertzog@debian.org>
# Copyright © 2008 Joey Hess <joeyh@debian.org>
# Copyright © 2005 Scott James Remnant (original implementation on www.dpkg.org)
#
# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.

# The conffile related functions are inspired by
# https://wiki.debian.org/DpkgConffileHandling

# This script is documented in dpkg-maintscript-helper(1)

##
## Functions to remove an obsolete conffile during upgrade
##
rm_conffile() {
  local CONFFILE="$1"
  local LASTVERSION="$2"
  local PACKAGE="$3"

if [ "$LASTVERSION" = "--" ]; then
    LASTVERSION=""
    PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE${DPKG_MAINTSCRIPT_ARCH:+:$DPKG_MAINTSCRIPT_ARCH}"
  fi
  if [ "$PACKAGE" = "--" -o -z "$PACKAGE" ]; then
    PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE${DPKG_MAINTSCRIPT_ARCH:+:$DPKG_MAINTSCRIPT_ARCH}"
  fi
  # Skip remaining parameters up to --
  while [ "$1" != "--" -a $# -gt 0 ]; do
    shift
  done
  [ $# -gt 0 ] || badusage "missing arguments after --"
  shift

[ -n "$PACKAGE" ] || error "couldn't identify the package"
  [ -n "$1" ] || error "maintainer script parameters are missing"
  [ -n "$DPKG_MAINTSCRIPT_NAME" ] || \
    error "environment variable DPKG_MAINTSCRIPT_NAME is required"
  [ -n "$DPKG_MAINTSCRIPT_PACKAGE" ] || \
    error "environment variable DPKG_MAINTSCRIPT_PACKAGE is required"
  [ "${CONFFILE}" != "${CONFFILE#/}" ] || \
    error "conffile '$CONFFILE' is not an absolute path"
  validate_optional_version "$LASTVERSION"

debug "Executing $0 rm_conffile in $DPKG_MAINTSCRIPT_NAME" \
        "of $DPKG_MAINTSCRIPT_PACKAGE"
  debug "CONFFILE=$CONFFILE PACKAGE=$PACKAGE" \
        "LASTVERSION=$LASTVERSION ACTION=$1 PARAM=$2"
  case "$DPKG_MAINTSCRIPT_NAME" in
  preinst)
    if [ "$1" = "install" -o "$1" = "upgrade" ] && [ -n "$2" ] &&
       dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
      prepare_rm_conffile "$CONFFILE" "$PACKAGE"
    fi
    ;;
  postinst)
    if [ "$1" = "configure" ] && [ -n "$2" ] &&
       dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
      finish_rm_conffile "$CONFFILE"
    fi
    ;;
  postrm)
    if [ "$1" = "purge" ]; then
      rm -f "$DPKG_ROOT$CONFFILE.dpkg-bak" \
            "$DPKG_ROOT$CONFFILE.dpkg-remove" \
            "$DPKG_ROOT$CONFFILE.dpkg-backup"
    fi
    if [ "$1" = "abort-install" -o "$1" = "abort-upgrade" ] &&
       [ -n "$2" ] &&
       dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
      abort_rm_conffile "$CONFFILE" "$PACKAGE"
    fi
    ;;
  *)
    debug "$0 rm_conffile not required in $DPKG_MAINTSCRIPT_NAME"
    ;;
  esac
}

prepare_rm_conffile() {
  local CONFFILE="$1"
  local PACKAGE="$2"

[ -e "$DPKG_ROOT$CONFFILE" ] || return 0
  ensure_package_owns_file "$PACKAGE" "$CONFFILE" || return 0

local md5sum old_md5sum
  md5sum="$(md5sum "$DPKG_ROOT$CONFFILE" | sed -e 's/ .*//')"
  old_md5sum="$(dpkg-query -W -f='${Conffiles}' "$PACKAGE" | \
    sed -n -e "\\'^ $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
  if [ "$md5sum" != "$old_md5sum" ]; then
    mv -f "$DPKG_ROOT$CONFFILE" "$DPKG_ROOT$CONFFILE.dpkg-backup"
  else
    mv -f "$DPKG_ROOT$CONFFILE" "$DPKG_ROOT$CONFFILE.dpkg-remove"
  fi
}

finish_rm_conffile() {
  local CONFFILE="$1"

if [ -e "$DPKG_ROOT$CONFFILE.dpkg-backup" ]; then
    echo "Obsolete conffile $DPKG_ROOT$CONFFILE has been modified by you."
    echo "Saving as $DPKG_ROOT$CONFFILE.dpkg-bak ..."
    mv -f "$DPKG_ROOT$CONFFILE.dpkg-backup" "$DPKG_ROOT$CONFFILE.dpkg-bak"
  fi
  if [ -e "$DPKG_ROOT$CONFFILE.dpkg-remove" ]; then
    echo "Removing obsolete conffile $DPKG_ROOT$CONFFILE ..."
    rm -f "$DPKG_ROOT$CONFFILE.dpkg-remove"
  fi
}

abort_rm_conffile() {
  local CONFFILE="$1"
  local PACKAGE="$2"

ensure_package_owns_file "$PACKAGE" "$CONFFILE" || return 0

if [ -e "$DPKG_ROOT$CONFFILE.dpkg-remove" ]; then
    echo "Reinstalling $DPKG_ROOT$CONFFILE that was moved away"
    mv "$DPKG_ROOT$CONFFILE.dpkg-remove" "$DPKG_ROOT$CONFFILE"
  fi
  if [ -e "$DPKG_ROOT$CONFFILE.dpkg-backup" ]; then
    echo "Reinstalling $DPKG_ROOT$CONFFILE that was backed-up"
    mv "$DPKG_ROOT$CONFFILE.dpkg-backup" "$DPKG_ROOT$CONFFILE"
  fi
}

##
## Functions to rename a conffile during upgrade
##
mv_conffile() {
  local OLDCONFFILE="$1"
  local NEWCONFFILE="$2"
  local LASTVERSION="$3"
  local PACKAGE="$4"

[ -n "$PACKAGE" ] || error "couldn't identify the package"
  [ -n "$1" ] || error "maintainer script parameters are missing"
  [ -n "$DPKG_MAINTSCRIPT_NAME" ] || \
    error "environment variable DPKG_MAINTSCRIPT_NAME is required"
  [ -n "$DPKG_MAINTSCRIPT_PACKAGE" ] || \
    error "environment variable DPKG_MAINTSCRIPT_PACKAGE is required"
  [ "${OLDCONFFILE}" != "${OLDCONFFILE#/}" ] || \
    error "old-conffile '$OLDCONFFILE' is not an absolute path"
  [ "${NEWCONFFILE}" != "${NEWCONFFILE#/}" ] || \
    error "new-conffile '$NEWCONFFILE' is not an absolute path"
  validate_optional_version "$LASTVERSION"

debug "Executing $0 mv_conffile in $DPKG_MAINTSCRIPT_NAME" \
        "of $DPKG_MAINTSCRIPT_PACKAGE"
  debug "CONFFILE=$OLDCONFFILE -> $NEWCONFFILE PACKAGE=$PACKAGE" \
        "LASTVERSION=$LASTVERSION ACTION=$1 PARAM=$2"
  case "$DPKG_MAINTSCRIPT_NAME" in
  preinst)
    if [ "$1" = "install" -o "$1" = "upgrade" ] && [ -n "$2" ] &&
       dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
      prepare_mv_conffile "$OLDCONFFILE" "$PACKAGE"
    fi
    ;;
  postinst)
    if [ "$1" = "configure" ] && [ -n "$2" ] &&
       dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
      finish_mv_conffile "$OLDCONFFILE" "$NEWCONFFILE" "$PACKAGE"
    fi
    ;;
  postrm)
    if [ "$1" = "abort-install" -o "$1" = "abort-upgrade" ] &&
       [ -n "$2" ] &&
       dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
      abort_mv_conffile "$OLDCONFFILE" "$PACKAGE"
    fi
    ;;
  *)
    debug "$0 mv_conffile not required in $DPKG_MAINTSCRIPT_NAME"
    ;;
  esac
}

prepare_mv_conffile() {
  local CONFFILE="$1"
  local PACKAGE="$2"

[ -e "$DPKG_ROOT$CONFFILE" ] || return 0

ensure_package_owns_file "$PACKAGE" "$CONFFILE" || return 0

local md5sum old_md5sum
  md5sum="$(md5sum "$DPKG_ROOT$CONFFILE" | sed -e 's/ .*//')"
  old_md5sum="$(dpkg-query -W -f='${Conffiles}' "$PACKAGE" | \
    sed -n -e "\\'^ $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
  if [ "$md5sum" = "$old_md5sum" ]; then
    mv -f "$DPKG_ROOT$CONFFILE" "$DPKG_ROOT$CONFFILE.dpkg-remove"
  fi
}

finish_mv_conffile() {
  local OLDCONFFILE="$1"
  local NEWCONFFILE="$2"
  local PACKAGE="$3"

rm -f "$DPKG_ROOT$OLDCONFFILE.dpkg-remove"

[ -e "$DPKG_ROOT$OLDCONFFILE" ] || return 0
  ensure_package_owns_file "$PACKAGE" "$OLDCONFFILE" || return 0

echo "Preserving user changes to $DPKG_ROOT$NEWCONFFILE (renamed from $DPKG_ROOT$OLDCONFFILE)..."
  if [ -e "$DPKG_ROOT$NEWCONFFILE" ]; then
    mv -f "$DPKG_ROOT$NEWCONFFILE" "$DPKG_ROOT$NEWCONFFILE.dpkg-new"
  fi
  mv -f "$DPKG_ROOT$OLDCONFFILE" "$DPKG_ROOT$NEWCONFFILE"
}

abort_mv_conffile() {
  local CONFFILE="$1"
  local PACKAGE="$2"

ensure_package_owns_file "$PACKAGE" "$CONFFILE" || return 0

if [ -e "$DPKG_ROOT$CONFFILE.dpkg-remove" ]; then
    echo "Reinstalling $DPKG_ROOT$CONFFILE that was moved away"
    mv "$DPKG_ROOT$CONFFILE.dpkg-remove" "$DPKG_ROOT$CONFFILE"
  fi
}

##
## Functions to replace a symlink with a directory
##
symlink_to_dir() {
  local SYMLINK="$1"
  local SYMLINK_TARGET="$2"
  local LASTVERSION="$3"
  local PACKAGE="$4"

# Skip remaining parameters up to --
  while [ "$1" != "--" -a $# -gt 0 ]; do
    shift
  done
  [ $# -gt 0 ] || badusage "missing arguments after --"
  shift

[ -n "$DPKG_MAINTSCRIPT_NAME" ] || \
    error "environment variable DPKG_MAINTSCRIPT_NAME is required"
  [ -n "$DPKG_MAINTSCRIPT_PACKAGE" ] || \
    error "environment variable DPKG_MAINTSCRIPT_PACKAGE is required"
  [ -n "$PACKAGE" ] || error "cannot identify the package"
  [ -n "$SYMLINK" ] || error "symlink parameter is missing"
  [ "${SYMLINK#/}" = "$SYMLINK" ] && \
    error "symlink pathname is not an absolute path"
  [ "${SYMLINK%/}" = "$SYMLINK" ] || \
    error "symlink pathname ends with a slash"
  [ -n "$SYMLINK_TARGET" ] || error "original symlink target is missing"
  [ -n "$1" ] || error "maintainer script parameters are missing"
  validate_optional_version "$LASTVERSION"

debug "Executing $0 symlink_to_dir in $DPKG_MAINTSCRIPT_NAME" \
        "of $DPKG_MAINTSCRIPT_PACKAGE"
  debug "SYMLINK=$SYMLINK -> $SYMLINK_TARGET PACKAGE=$PACKAGE" \
        "LASTVERSION=$LASTVERSION ACTION=$1 PARAM=$2"

case "$DPKG_MAINTSCRIPT_NAME" in
  preinst)
    if [ "$1" = "install" -o "$1" = "upgrade" ] &&
       [ -n "$2" ] && [ -h "$DPKG_ROOT$SYMLINK" ] &&
       symlink_match "$SYMLINK" "$SYMLINK_TARGET" &&
       dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
      mv -f "$DPKG_ROOT$SYMLINK" "$DPKG_ROOT${SYMLINK}.dpkg-backup"
    fi
    ;;
  postinst)
    # We cannot bail depending on the version, as here we only
    # know what was the last configured version, and we might
    # have been unpacked, then upgraded with an unpack and thus
    # never been configured before.
    if [ "$1" = "configure" ] &&
       [ -h "$DPKG_ROOT${SYMLINK}.dpkg-backup" ] &&
       symlink_match "${SYMLINK}.dpkg-backup" "$SYMLINK_TARGET"
    then
      rm -f "$DPKG_ROOT${SYMLINK}.dpkg-backup"
    fi
    ;;
  postrm)
    if [ "$1" = "purge" ] && [ -h "$DPKG_ROOT${SYMLINK}.dpkg-backup" ]; then
      rm -f "$DPKG_ROOT${SYMLINK}.dpkg-backup"
    fi
    if [ "$1" = "abort-install" -o "$1" = "abort-upgrade" ] &&
       [ -n "$2" ] &&
       [ ! -e "$DPKG_ROOT$SYMLINK" ] &&
       [ -h "$DPKG_ROOT${SYMLINK}.dpkg-backup" ] &&
       symlink_match "${SYMLINK}.dpkg-backup" "$SYMLINK_TARGET" &&
       dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
      echo "Restoring backup of $DPKG_ROOT$SYMLINK ..."
      mv "$DPKG_ROOT${SYMLINK}.dpkg-backup" "$DPKG_ROOT$SYMLINK"
    fi
    ;;
  *)
    debug "$0 symlink_to_dir not required in $DPKG_MAINTSCRIPT_NAME"
    ;;
  esac
}

##
## Functions to replace a directory with a symlink
##
dir_to_symlink() {
  local PATHNAME="${1%/}"
  local SYMLINK_TARGET="$2"
  local LASTVERSION="$3"
  local PACKAGE="$4"

# Skip remaining parameters up to --
  while [ "$1" != "--" -a $# -gt 0 ]; do
    shift
  done
  [ $# -gt 0 ] || badusage "missing arguments after --"
  shift

[ -n "$DPKG_MAINTSCRIPT_NAME" ] || \
    error "environment variable DPKG_MAINTSCRIPT_NAME is required"
  [ -n "$DPKG_MAINTSCRIPT_PACKAGE" ] || \
    error "environment variable DPKG_MAINTSCRIPT_PACKAGE is required"
  [ -n "$PACKAGE" ] || error "cannot identify the package"
  [ -n "$PATHNAME" ] || error "directory parameter is missing"
  [ "${PATHNAME#/}" = "$PATHNAME" ] && \
    error "directory parameter is not an absolute path"
  [ -n "$SYMLINK_TARGET" ] || error "new symlink target is missing"
  [ -n "$1" ] || error "maintainer script parameters are missing"
  validate_optional_version "$LASTVERSION"

debug "Executing $0 dir_to_symlink in $DPKG_MAINTSCRIPT_NAME" \
        "of $DPKG_MAINTSCRIPT_PACKAGE"
  debug "PATHNAME=$PATHNAME SYMLINK_TARGET=$SYMLINK_TARGET" \
        "PACKAGE=$PACKAGE LASTVERSION=$LASTVERSION ACTION=$1 PARAM=$2"

case "$DPKG_MAINTSCRIPT_NAME" in
  preinst)
    if [ "$1" = "install" -o "$1" = "upgrade" ] &&
       [ -n "$2" ] &&
       [ ! -h "$DPKG_ROOT$PATHNAME" ] &&
       [ -d "$DPKG_ROOT$PATHNAME" ] &&
       dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
      prepare_dir_to_symlink "$PACKAGE" "$PATHNAME"
    fi
    ;;
  postinst)
    # We cannot bail depending on the version, as here we only
    # know what was the last configured version, and we might
    # have been unpacked, then upgraded with an unpack and thus
    # never been configured before.
    if [ "$1" = "configure" ] &&
       [ -d "$DPKG_ROOT${PATHNAME}.dpkg-backup" ] &&
       [ ! -h "$DPKG_ROOT$PATHNAME" ] &&
       [ -d "$DPKG_ROOT$PATHNAME" ] &&
       [ -f "$DPKG_ROOT$PATHNAME/.dpkg-staging-dir" ]; then
      finish_dir_to_symlink "$PATHNAME" "$SYMLINK_TARGET"
    fi
    ;;
  postrm)
    if [ "$1" = "purge" ] &&
       [ -d "$DPKG_ROOT${PATHNAME}.dpkg-backup" ]; then
      rm -rf "$DPKG_ROOT${PATHNAME}.dpkg-backup"
    fi
    if [ "$1" = "abort-install" -o "$1" = "abort-upgrade" ] &&
       [ -n "$2" ] &&
       [ -d "$DPKG_ROOT${PATHNAME}.dpkg-backup" ] &&
       [ $ ! -h "$DPKG_ROOT$PATHNAME" -a \
            -d "$DPKG_ROOT$PATHNAME" -a \
            -f "$DPKG_ROOT$PATHNAME/.dpkg-staging-dir" $ -o \
         $ -h "$DPKG_ROOT$PATHNAME" -a \
            \( "$(readlink "$DPKG_ROOT$PATHNAME")" = "$SYMLINK_TARGET" -o \
               "$(dpkg-realpath "$PATHNAME")" = "$SYMLINK_TARGET" $ \) ] &&
       dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
      abort_dir_to_symlink "$PATHNAME"
    fi
    ;;
  *)
    debug "$0 dir_to_symlink not required in $DPKG_MAINTSCRIPT_NAME"
    ;;
  esac
}

prepare_dir_to_symlink()
{
  local PACKAGE="$1"
  local PATHNAME="$2"

local LINE
  # If there are conffiles we should not perform the switch.
  dpkg-query -W -f='${Conffiles}\n' "$PACKAGE" | while read -r LINE; do
    case "$LINE" in
    "$PATHNAME"/*)
      error "directory '$PATHNAME' contains conffiles," \
            "cannot switch to symlink"
      ;;
    esac
  done

# If there are locally created files or files owned by another package
  # we should not perform the switch.
  export DPKG_MAINTSCRIPT_HELPER_INTERNAL_API="$version"
  find "$DPKG_ROOT$PATHNAME" -print0 | \
    xargs -0 -n1 "$0" _internal_pkg_must_own_file "$PACKAGE" || \
    error "directory '$PATHNAME' contains files not owned by" \
          "package $PACKAGE, cannot switch to symlink"
  unset DPKG_MAINTSCRIPT_HELPER_INTERNAL_API

# At this point, we know that the directory either contains no files,
  # or only non-conffiles owned by the package.
  #
  # To do the switch we cannot simply replace it with the final symlink
  # just yet, because dpkg needs to remove any file present in the old
  # package that have disappeared in the new one, and we do not want to
  # lose files resolving to the same pathname in the symlink target.
  #
  # We cannot replace the directory with a staging symlink either,
  # because dpkg will update symlinks to their new target.
  #
  # So we need to create a staging directory, to avoid removing files
  # from other packages, and to trap any new files in the directory
  # to move them to their correct place later on.
  mv -f "$DPKG_ROOT$PATHNAME" "$DPKG_ROOT${PATHNAME}.dpkg-backup"
  mkdir "$DPKG_ROOT$PATHNAME"

# Mark it as a staging directory, so that we can track things.
  touch "$DPKG_ROOT$PATHNAME/.dpkg-staging-dir"
}

finish_dir_to_symlink()
{
  local PATHNAME="$1"
  local SYMLINK_TARGET="$2"

# Move the contents of the staging directory to the symlink target,
  # as those are all new files installed between this package being
  # unpacked and configured.
  local ABS_SYMLINK_TARGET
  if [ "${SYMLINK_TARGET#/}" = "$SYMLINK_TARGET" ]; then
    ABS_SYMLINK_TARGET="$(dirname "$PATHNAME")/$SYMLINK_TARGET"
  else
    ABS_SYMLINK_TARGET="$SYMLINK_TARGET"
  fi
  rm "$DPKG_ROOT$PATHNAME/.dpkg-staging-dir"
  find "$DPKG_ROOT$PATHNAME" -mindepth 1 -maxdepth 1 -print0 | \
    xargs -0 -I% mv -f "%" "$DPKG_ROOT$ABS_SYMLINK_TARGET/"

# Remove the staging directory.
  rmdir "$DPKG_ROOT$PATHNAME"

# Do the actual switch.
  ln -s "$SYMLINK_TARGET" "$DPKG_ROOT$PATHNAME"

# We are left behind the old files owned by this package in the backup
  # directory, just remove it.
  rm -rf "$DPKG_ROOT${PATHNAME}.dpkg-backup"
}

abort_dir_to_symlink()
{
  local PATHNAME="$1"

echo "Restoring backup of $DPKG_ROOT$PATHNAME ..."
  if [ -h "$DPKG_ROOT$PATHNAME" ]; then
    rm -f "$DPKG_ROOT$PATHNAME"
  else
    # The staging directory must be empty, as no other package
    # should have been unpacked in between.
    rm -f "$DPKG_ROOT$PATHNAME/.dpkg-staging-dir"
    rmdir "$DPKG_ROOT$PATHNAME"
  fi

mv "$DPKG_ROOT${PATHNAME}.dpkg-backup" "$DPKG_ROOT$PATHNAME"
}

# Common functions
validate_optional_version() {
  local VERSION="$1"

if [ -z "$VERSION" ]; then
    return
  fi

if ! VERSIONCHECK=$(dpkg --validate-version -- "$VERSION" 2>&1); then
    error "$VERSIONCHECK"
  fi
}

ensure_package_owns_file() {
  local PACKAGE="$1"
  local FILE="$2"

if ! dpkg-query -L "$PACKAGE" | grep -F -q -x "$FILE"; then
    debug "File '$FILE' not owned by package " \
          "'$PACKAGE', skipping $command"
    return 1
  fi
  return 0
}

internal_pkg_must_own_file()
{
  local PACKAGE="$1"
  local FILE="${2##"$DPKG_ROOT"}"

if [ "$DPKG_MAINTSCRIPT_HELPER_INTERNAL_API" != "$version" ]; then
    error "internal API used by external command"
  fi

if ! ensure_package_owns_file "$PACKAGE" "$FILE"; then
    error "file '$FILE' not owned by package '$PACKAGE'"
  fi
  return 0
}

symlink_match()
{
  local SYMLINK="$1"
  local SYMLINK_TARGET="$2"

[ "$(readlink "$DPKG_ROOT$SYMLINK")" = "$SYMLINK_TARGET" ] || \
  [ "$(dpkg-realpath "$SYMLINK")" = "$SYMLINK_TARGET" ]
}

usage() {
  cat <<END
Usage: $PROGNAME <command> <parameter>... -- <maintainer-script-parameter>...

Commands:
  supports <command>
        Returns 0 (success) if the given command is supported, 1 otherwise.
  rm_conffile <conffile> [<last-version> [<package>]]
        Remove obsolete conffile. Must be called in preinst, postinst and
        postrm.
  mv_conffile <old-conf> <new-conf> [<last-version> [<package>]]
        Rename a conffile. Must be called in preinst, postinst and postrm.
  symlink_to_dir <pathname> <old-symlink-target> [<last-version> [<package>]]
        Replace a symlink with a directory. Must be called in preinst,
        postinst and postrm.
  dir_to_symlink <pathname> <new-symlink-target> [<last-version> [<package>]]
        Replace a directory with a symlink. Must be called in preinst,
        postinst and postrm.
  help
  -?, --help
        Show this help message.
      --version
        Show the version.
END
}

# Main code
set -e

PROGNAME=$(basename "$0")
version="1.21.22"
DPKG_ROOT=${DPKG_ROOT:+$(realpath "$DPKG_ROOT")}
# Remove default root dir.
if [ "$DPKG_ROOT" = "/" ]; then
  DPKG_ROOT=""
fi
export DPKG_ROOT

PKGDATADIR_DEFAULT='/usr/share/dpkg'
PKGDATADIR="${DPKG_DATADIR:-$PKGDATADIR_DEFAULT}"

# shellcheck source=src/sh/dpkg-error.sh
. "$PKGDATADIR/sh/dpkg-error.sh"

setup_colors

command="$1"
[ $# -gt 0 ] || badusage "missing command"
shift

case "$command" in
supports)
  case "$1" in
  rm_conffile|mv_conffile|symlink_to_dir|dir_to_symlink)
    code=0
    ;;
  *)
    code=1
    ;;
  esac
  if [ -z "$DPKG_MAINTSCRIPT_NAME" ]; then
    warning "environment variable DPKG_MAINTSCRIPT_NAME missing"
    code=1
  fi
  if [ -z "$DPKG_MAINTSCRIPT_PACKAGE" ]; then
    warning "environment variable DPKG_MAINTSCRIPT_PACKAGE missing"
    code=1
  fi
  exit $code
  ;;
rm_conffile)
  rm_conffile "$@"
  ;;
mv_conffile)
  mv_conffile "$@"
  ;;
symlink_to_dir)
  symlink_to_dir "$@"
  ;;
dir_to_symlink)
  dir_to_symlink "$@"
  ;;
_internal_pkg_must_own_file)
  # This is an internal command, must not be used outside this program.
  internal_pkg_must_own_file "$@"
  ;;
--help|help|-?)
  usage
  ;;
--version)
  cat <<END
Debian $PROGNAME version $version.

This is free software; see the GNU General Public License version 2 or
later for copying conditions. There is NO warranty.
END
  ;;
*)
  badusage "command $command is unknown
Hint: upgrading dpkg to a newer version might help."
esac

exit 0

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