install-sh revision 516e9f99
108f3b10eSmrg#!/bin/sh
208f3b10eSmrg# install - install a program, script, or datafile
3516e9f99Smrg
4516e9f99Smrgscriptversion=2009-04-28.21; # UTC
5516e9f99Smrg
608f3b10eSmrg# This originates from X11R5 (mit/util/scripts/install.sh), which was
708f3b10eSmrg# later released in X11R6 (xc/config/util/install.sh) with the
808f3b10eSmrg# following copyright and license.
908f3b10eSmrg#
1008f3b10eSmrg# Copyright (C) 1994 X Consortium
1108f3b10eSmrg#
1208f3b10eSmrg# Permission is hereby granted, free of charge, to any person obtaining a copy
1308f3b10eSmrg# of this software and associated documentation files (the "Software"), to
1408f3b10eSmrg# deal in the Software without restriction, including without limitation the
1508f3b10eSmrg# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
1608f3b10eSmrg# sell copies of the Software, and to permit persons to whom the Software is
1708f3b10eSmrg# furnished to do so, subject to the following conditions:
1808f3b10eSmrg#
1908f3b10eSmrg# The above copyright notice and this permission notice shall be included in
2008f3b10eSmrg# all copies or substantial portions of the Software.
2108f3b10eSmrg#
2208f3b10eSmrg# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
2308f3b10eSmrg# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
2408f3b10eSmrg# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
2508f3b10eSmrg# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
2608f3b10eSmrg# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
2708f3b10eSmrg# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
2808f3b10eSmrg#
2908f3b10eSmrg# Except as contained in this notice, the name of the X Consortium shall not
3008f3b10eSmrg# be used in advertising or otherwise to promote the sale, use or other deal-
3108f3b10eSmrg# ings in this Software without prior written authorization from the X Consor-
3208f3b10eSmrg# tium.
3308f3b10eSmrg#
3408f3b10eSmrg#
3508f3b10eSmrg# FSF changes to this file are in the public domain.
3608f3b10eSmrg#
3708f3b10eSmrg# Calling this script install-sh is preferred over install.sh, to prevent
3808f3b10eSmrg# `make' implicit rules from creating a file called install from it
3908f3b10eSmrg# when there is no Makefile.
4008f3b10eSmrg#
4108f3b10eSmrg# This script is compatible with the BSD install script, but was written
42516e9f99Smrg# from scratch.
4308f3b10eSmrg
44516e9f99Smrgnl='
45516e9f99Smrg'
46516e9f99SmrgIFS=" ""	$nl"
4708f3b10eSmrg
4808f3b10eSmrg# set DOITPROG to echo to test this script
4908f3b10eSmrg
5008f3b10eSmrg# Don't use :- since 4.3BSD and earlier shells don't like it.
51516e9f99Smrgdoit=${DOITPROG-}
52516e9f99Smrgif test -z "$doit"; then
53516e9f99Smrg  doit_exec=exec
5408f3b10eSmrgelse
55516e9f99Smrg  doit_exec=$doit
5608f3b10eSmrgfi
5708f3b10eSmrg
58516e9f99Smrg# Put in absolute file names if you don't have them in your path;
59516e9f99Smrg# or use environment vars.
60516e9f99Smrg
61516e9f99Smrgchgrpprog=${CHGRPPROG-chgrp}
62516e9f99Smrgchmodprog=${CHMODPROG-chmod}
63516e9f99Smrgchownprog=${CHOWNPROG-chown}
64516e9f99Smrgcmpprog=${CMPPROG-cmp}
65516e9f99Smrgcpprog=${CPPROG-cp}
66516e9f99Smrgmkdirprog=${MKDIRPROG-mkdir}
67516e9f99Smrgmvprog=${MVPROG-mv}
68516e9f99Smrgrmprog=${RMPROG-rm}
69516e9f99Smrgstripprog=${STRIPPROG-strip}
70516e9f99Smrg
71516e9f99Smrgposix_glob='?'
72516e9f99Smrginitialize_posix_glob='
73516e9f99Smrg  test "$posix_glob" != "?" || {
74516e9f99Smrg    if (set -f) 2>/dev/null; then
75516e9f99Smrg      posix_glob=
76516e9f99Smrg    else
77516e9f99Smrg      posix_glob=:
78516e9f99Smrg    fi
79516e9f99Smrg  }
80516e9f99Smrg'
81516e9f99Smrg
82516e9f99Smrgposix_mkdir=
83516e9f99Smrg
84516e9f99Smrg# Desired mode of installed file.
85516e9f99Smrgmode=0755
86516e9f99Smrg
87516e9f99Smrgchgrpcmd=
88516e9f99Smrgchmodcmd=$chmodprog
89516e9f99Smrgchowncmd=
90516e9f99Smrgmvcmd=$mvprog
91516e9f99Smrgrmcmd="$rmprog -f"
92516e9f99Smrgstripcmd=
9308f3b10eSmrg
94516e9f99Smrgsrc=
95516e9f99Smrgdst=
96516e9f99Smrgdir_arg=
97516e9f99Smrgdst_arg=
9808f3b10eSmrg
99516e9f99Smrgcopy_on_change=false
100516e9f99Smrgno_target_directory=
10108f3b10eSmrg
102516e9f99Smrgusage="\
103516e9f99SmrgUsage: $0 [OPTION]... [-T] SRCFILE DSTFILE
104516e9f99Smrg   or: $0 [OPTION]... SRCFILES... DIRECTORY
105516e9f99Smrg   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
106516e9f99Smrg   or: $0 [OPTION]... -d DIRECTORIES...
10708f3b10eSmrg
108516e9f99SmrgIn the 1st form, copy SRCFILE to DSTFILE.
109516e9f99SmrgIn the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
110516e9f99SmrgIn the 4th, create DIRECTORIES.
11108f3b10eSmrg
112516e9f99SmrgOptions:
113516e9f99Smrg     --help     display this help and exit.
114516e9f99Smrg     --version  display version info and exit.
11508f3b10eSmrg
116516e9f99Smrg  -c            (ignored)
117516e9f99Smrg  -C            install only if different (preserve the last data modification time)
118516e9f99Smrg  -d            create directories instead of installing files.
119516e9f99Smrg  -g GROUP      $chgrpprog installed files to GROUP.
120516e9f99Smrg  -m MODE       $chmodprog installed files to MODE.
121516e9f99Smrg  -o USER       $chownprog installed files to USER.
122516e9f99Smrg  -s            $stripprog installed files.
123516e9f99Smrg  -t DIRECTORY  install into DIRECTORY.
124516e9f99Smrg  -T            report an error if DSTFILE is a directory.
12508f3b10eSmrg
126516e9f99SmrgEnvironment variables override the default commands:
127516e9f99Smrg  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
128516e9f99Smrg  RMPROG STRIPPROG
129516e9f99Smrg"
13008f3b10eSmrg
131516e9f99Smrgwhile test $# -ne 0; do
132516e9f99Smrg  case $1 in
133516e9f99Smrg    -c) ;;
13408f3b10eSmrg
135516e9f99Smrg    -C) copy_on_change=true;;
13608f3b10eSmrg
137516e9f99Smrg    -d) dir_arg=true;;
13808f3b10eSmrg
139516e9f99Smrg    -g) chgrpcmd="$chgrpprog $2"
140516e9f99Smrg	shift;;
14108f3b10eSmrg
142516e9f99Smrg    --help) echo "$usage"; exit $?;;
14308f3b10eSmrg
144516e9f99Smrg    -m) mode=$2
145516e9f99Smrg	case $mode in
146516e9f99Smrg	  *' '* | *'	'* | *'
147516e9f99Smrg'*	  | *'*'* | *'?'* | *'['*)
148516e9f99Smrg	    echo "$0: invalid mode: $mode" >&2
149516e9f99Smrg	    exit 1;;
150516e9f99Smrg	esac
151516e9f99Smrg	shift;;
15208f3b10eSmrg
153516e9f99Smrg    -o) chowncmd="$chownprog $2"
154516e9f99Smrg	shift;;
15508f3b10eSmrg
156516e9f99Smrg    -s) stripcmd=$stripprog;;
15708f3b10eSmrg
158516e9f99Smrg    -t) dst_arg=$2
159516e9f99Smrg	shift;;
16008f3b10eSmrg
161516e9f99Smrg    -T) no_target_directory=true;;
16208f3b10eSmrg
163516e9f99Smrg    --version) echo "$0 $scriptversion"; exit $?;;
16408f3b10eSmrg
165516e9f99Smrg    --)	shift
166516e9f99Smrg	break;;
16708f3b10eSmrg
168516e9f99Smrg    -*)	echo "$0: invalid option: $1" >&2
169516e9f99Smrg	exit 1;;
17008f3b10eSmrg
171516e9f99Smrg    *)  break;;
172516e9f99Smrg  esac
173516e9f99Smrg  shift
174516e9f99Smrgdone
17508f3b10eSmrg
176516e9f99Smrgif test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
177516e9f99Smrg  # When -d is used, all remaining arguments are directories to create.
178516e9f99Smrg  # When -t is used, the destination is already specified.
179516e9f99Smrg  # Otherwise, the last argument is the destination.  Remove it from $@.
180516e9f99Smrg  for arg
181516e9f99Smrg  do
182516e9f99Smrg    if test -n "$dst_arg"; then
183516e9f99Smrg      # $@ is not empty: it contains at least $arg.
184516e9f99Smrg      set fnord "$@" "$dst_arg"
185516e9f99Smrg      shift # fnord
186516e9f99Smrg    fi
187516e9f99Smrg    shift # arg
188516e9f99Smrg    dst_arg=$arg
189516e9f99Smrg  done
190516e9f99Smrgfi
19108f3b10eSmrg
192516e9f99Smrgif test $# -eq 0; then
193516e9f99Smrg  if test -z "$dir_arg"; then
194516e9f99Smrg    echo "$0: no input file specified." >&2
195516e9f99Smrg    exit 1
196516e9f99Smrg  fi
197516e9f99Smrg  # It's OK to call `install-sh -d' without argument.
198516e9f99Smrg  # This can happen when creating conditional directories.
199516e9f99Smrg  exit 0
200516e9f99Smrgfi
20108f3b10eSmrg
202516e9f99Smrgif test -z "$dir_arg"; then
203516e9f99Smrg  trap '(exit $?); exit' 1 2 13 15
204516e9f99Smrg
205516e9f99Smrg  # Set umask so as not to create temps with too-generous modes.
206516e9f99Smrg  # However, 'strip' requires both read and write access to temps.
207516e9f99Smrg  case $mode in
208516e9f99Smrg    # Optimize common cases.
209516e9f99Smrg    *644) cp_umask=133;;
210516e9f99Smrg    *755) cp_umask=22;;
211516e9f99Smrg
212516e9f99Smrg    *[0-7])
213516e9f99Smrg      if test -z "$stripcmd"; then
214516e9f99Smrg	u_plus_rw=
215516e9f99Smrg      else
216516e9f99Smrg	u_plus_rw='% 200'
217516e9f99Smrg      fi
218516e9f99Smrg      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
219516e9f99Smrg    *)
220516e9f99Smrg      if test -z "$stripcmd"; then
221516e9f99Smrg	u_plus_rw=
222516e9f99Smrg      else
223516e9f99Smrg	u_plus_rw=,u+rw
224516e9f99Smrg      fi
225516e9f99Smrg      cp_umask=$mode$u_plus_rw;;
226516e9f99Smrg  esac
227516e9f99Smrgfi
22808f3b10eSmrg
229516e9f99Smrgfor src
230516e9f99Smrgdo
231516e9f99Smrg  # Protect names starting with `-'.
232516e9f99Smrg  case $src in
233516e9f99Smrg    -*) src=./$src;;
234516e9f99Smrg  esac
235516e9f99Smrg
236516e9f99Smrg  if test -n "$dir_arg"; then
237516e9f99Smrg    dst=$src
238516e9f99Smrg    dstdir=$dst
239516e9f99Smrg    test -d "$dstdir"
240516e9f99Smrg    dstdir_status=$?
241516e9f99Smrg  else
242516e9f99Smrg
243516e9f99Smrg    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
244516e9f99Smrg    # might cause directories to be created, which would be especially bad
245516e9f99Smrg    # if $src (and thus $dsttmp) contains '*'.
246516e9f99Smrg    if test ! -f "$src" && test ! -d "$src"; then
247516e9f99Smrg      echo "$0: $src does not exist." >&2
248516e9f99Smrg      exit 1
249516e9f99Smrg    fi
250516e9f99Smrg
251516e9f99Smrg    if test -z "$dst_arg"; then
252516e9f99Smrg      echo "$0: no destination specified." >&2
253516e9f99Smrg      exit 1
254516e9f99Smrg    fi
255516e9f99Smrg
256516e9f99Smrg    dst=$dst_arg
257516e9f99Smrg    # Protect names starting with `-'.
258516e9f99Smrg    case $dst in
259516e9f99Smrg      -*) dst=./$dst;;
260516e9f99Smrg    esac
26108f3b10eSmrg
262516e9f99Smrg    # If destination is a directory, append the input filename; won't work
263516e9f99Smrg    # if double slashes aren't ignored.
264516e9f99Smrg    if test -d "$dst"; then
265516e9f99Smrg      if test -n "$no_target_directory"; then
266516e9f99Smrg	echo "$0: $dst_arg: Is a directory" >&2
267516e9f99Smrg	exit 1
268516e9f99Smrg      fi
269516e9f99Smrg      dstdir=$dst
270516e9f99Smrg      dst=$dstdir/`basename "$src"`
271516e9f99Smrg      dstdir_status=0
272516e9f99Smrg    else
273516e9f99Smrg      # Prefer dirname, but fall back on a substitute if dirname fails.
274516e9f99Smrg      dstdir=`
275516e9f99Smrg	(dirname "$dst") 2>/dev/null ||
276516e9f99Smrg	expr X"$dst" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
277516e9f99Smrg	     X"$dst" : 'X\(//\)[^/]' \| \
278516e9f99Smrg	     X"$dst" : 'X\(//\)$' \| \
279516e9f99Smrg	     X"$dst" : 'X\(/\)' \| . 2>/dev/null ||
280516e9f99Smrg	echo X"$dst" |
281516e9f99Smrg	    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
282516e9f99Smrg		   s//\1/
283516e9f99Smrg		   q
284516e9f99Smrg		 }
285516e9f99Smrg		 /^X\(\/\/\)[^/].*/{
286516e9f99Smrg		   s//\1/
287516e9f99Smrg		   q
288516e9f99Smrg		 }
289516e9f99Smrg		 /^X\(\/\/\)$/{
290516e9f99Smrg		   s//\1/
291516e9f99Smrg		   q
292516e9f99Smrg		 }
293516e9f99Smrg		 /^X\(\/\).*/{
294516e9f99Smrg		   s//\1/
295516e9f99Smrg		   q
296516e9f99Smrg		 }
297516e9f99Smrg		 s/.*/./; q'
298516e9f99Smrg      `
299516e9f99Smrg
300516e9f99Smrg      test -d "$dstdir"
301516e9f99Smrg      dstdir_status=$?
302516e9f99Smrg    fi
303516e9f99Smrg  fi
304516e9f99Smrg
305516e9f99Smrg  obsolete_mkdir_used=false
306516e9f99Smrg
307516e9f99Smrg  if test $dstdir_status != 0; then
308516e9f99Smrg    case $posix_mkdir in
309516e9f99Smrg      '')
310516e9f99Smrg	# Create intermediate dirs using mode 755 as modified by the umask.
311516e9f99Smrg	# This is like FreeBSD 'install' as of 1997-10-28.
312516e9f99Smrg	umask=`umask`
313516e9f99Smrg	case $stripcmd.$umask in
314516e9f99Smrg	  # Optimize common cases.
315516e9f99Smrg	  *[2367][2367]) mkdir_umask=$umask;;
316516e9f99Smrg	  .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;;
317516e9f99Smrg
318516e9f99Smrg	  *[0-7])
319516e9f99Smrg	    mkdir_umask=`expr $umask + 22 \
320516e9f99Smrg	      - $umask % 100 % 40 + $umask % 20 \
321516e9f99Smrg	      - $umask % 10 % 4 + $umask % 2
322516e9f99Smrg	    `;;
323516e9f99Smrg	  *) mkdir_umask=$umask,go-w;;
324516e9f99Smrg	esac
325516e9f99Smrg
326516e9f99Smrg	# With -d, create the new directory with the user-specified mode.
327516e9f99Smrg	# Otherwise, rely on $mkdir_umask.
328516e9f99Smrg	if test -n "$dir_arg"; then
329516e9f99Smrg	  mkdir_mode=-m$mode
33008f3b10eSmrg	else
331516e9f99Smrg	  mkdir_mode=
33208f3b10eSmrg	fi
33308f3b10eSmrg
334516e9f99Smrg	posix_mkdir=false
335516e9f99Smrg	case $umask in
336516e9f99Smrg	  *[123567][0-7][0-7])
337516e9f99Smrg	    # POSIX mkdir -p sets u+wx bits regardless of umask, which
338516e9f99Smrg	    # is incompatible with FreeBSD 'install' when (umask & 300) != 0.
339516e9f99Smrg	    ;;
340516e9f99Smrg	  *)
341516e9f99Smrg	    tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
342516e9f99Smrg	    trap 'ret=$?; rmdir "$tmpdir/d" "$tmpdir" 2>/dev/null; exit $ret' 0
343516e9f99Smrg
344516e9f99Smrg	    if (umask $mkdir_umask &&
345516e9f99Smrg		exec $mkdirprog $mkdir_mode -p -- "$tmpdir/d") >/dev/null 2>&1
346516e9f99Smrg	    then
347516e9f99Smrg	      if test -z "$dir_arg" || {
348516e9f99Smrg		   # Check for POSIX incompatibilities with -m.
349516e9f99Smrg		   # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
350516e9f99Smrg		   # other-writeable bit of parent directory when it shouldn't.
351516e9f99Smrg		   # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
352516e9f99Smrg		   ls_ld_tmpdir=`ls -ld "$tmpdir"`
353516e9f99Smrg		   case $ls_ld_tmpdir in
354516e9f99Smrg		     d????-?r-*) different_mode=700;;
355516e9f99Smrg		     d????-?--*) different_mode=755;;
356516e9f99Smrg		     *) false;;
357516e9f99Smrg		   esac &&
358516e9f99Smrg		   $mkdirprog -m$different_mode -p -- "$tmpdir" && {
359516e9f99Smrg		     ls_ld_tmpdir_1=`ls -ld "$tmpdir"`
360516e9f99Smrg		     test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
361516e9f99Smrg		   }
362516e9f99Smrg		 }
363516e9f99Smrg	      then posix_mkdir=:
364516e9f99Smrg	      fi
365516e9f99Smrg	      rmdir "$tmpdir/d" "$tmpdir"
366516e9f99Smrg	    else
367516e9f99Smrg	      # Remove any dirs left behind by ancient mkdir implementations.
368516e9f99Smrg	      rmdir ./$mkdir_mode ./-p ./-- 2>/dev/null
369516e9f99Smrg	    fi
370516e9f99Smrg	    trap '' 0;;
371516e9f99Smrg	esac;;
372516e9f99Smrg    esac
37308f3b10eSmrg
374516e9f99Smrg    if
375516e9f99Smrg      $posix_mkdir && (
376516e9f99Smrg	umask $mkdir_umask &&
377516e9f99Smrg	$doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
378516e9f99Smrg      )
379516e9f99Smrg    then :
380516e9f99Smrg    else
381516e9f99Smrg
382516e9f99Smrg      # The umask is ridiculous, or mkdir does not conform to POSIX,
383516e9f99Smrg      # or it failed possibly due to a race condition.  Create the
384516e9f99Smrg      # directory the slow way, step by step, checking for races as we go.
385516e9f99Smrg
386516e9f99Smrg      case $dstdir in
387516e9f99Smrg	/*) prefix='/';;
388516e9f99Smrg	-*) prefix='./';;
389516e9f99Smrg	*)  prefix='';;
390516e9f99Smrg      esac
391516e9f99Smrg
392516e9f99Smrg      eval "$initialize_posix_glob"
393516e9f99Smrg
394516e9f99Smrg      oIFS=$IFS
395516e9f99Smrg      IFS=/
396516e9f99Smrg      $posix_glob set -f
397516e9f99Smrg      set fnord $dstdir
398516e9f99Smrg      shift
399516e9f99Smrg      $posix_glob set +f
400516e9f99Smrg      IFS=$oIFS
401516e9f99Smrg
402516e9f99Smrg      prefixes=
403516e9f99Smrg
404516e9f99Smrg      for d
405516e9f99Smrg      do
406516e9f99Smrg	test -z "$d" && continue
407516e9f99Smrg
408516e9f99Smrg	prefix=$prefix$d
409516e9f99Smrg	if test -d "$prefix"; then
410516e9f99Smrg	  prefixes=
411516e9f99Smrg	else
412516e9f99Smrg	  if $posix_mkdir; then
413516e9f99Smrg	    (umask=$mkdir_umask &&
414516e9f99Smrg	     $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
415516e9f99Smrg	    # Don't fail if two instances are running concurrently.
416516e9f99Smrg	    test -d "$prefix" || exit 1
417516e9f99Smrg	  else
418516e9f99Smrg	    case $prefix in
419516e9f99Smrg	      *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
420516e9f99Smrg	      *) qprefix=$prefix;;
421516e9f99Smrg	    esac
422516e9f99Smrg	    prefixes="$prefixes '$qprefix'"
423516e9f99Smrg	  fi
424516e9f99Smrg	fi
425516e9f99Smrg	prefix=$prefix/
426516e9f99Smrg      done
427516e9f99Smrg
428516e9f99Smrg      if test -n "$prefixes"; then
429516e9f99Smrg	# Don't fail if two instances are running concurrently.
430516e9f99Smrg	(umask $mkdir_umask &&
431516e9f99Smrg	 eval "\$doit_exec \$mkdirprog $prefixes") ||
432516e9f99Smrg	  test -d "$dstdir" || exit 1
433516e9f99Smrg	obsolete_mkdir_used=true
434516e9f99Smrg      fi
435516e9f99Smrg    fi
436516e9f99Smrg  fi
437516e9f99Smrg
438516e9f99Smrg  if test -n "$dir_arg"; then
439516e9f99Smrg    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
440516e9f99Smrg    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
441516e9f99Smrg    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
442516e9f99Smrg      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
443516e9f99Smrg  else
444516e9f99Smrg
445516e9f99Smrg    # Make a couple of temp file names in the proper directory.
446516e9f99Smrg    dsttmp=$dstdir/_inst.$$_
447516e9f99Smrg    rmtmp=$dstdir/_rm.$$_
448516e9f99Smrg
449516e9f99Smrg    # Trap to clean up those temp files at exit.
450516e9f99Smrg    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
451516e9f99Smrg
452516e9f99Smrg    # Copy the file name to the temp name.
453516e9f99Smrg    (umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") &&
454516e9f99Smrg
455516e9f99Smrg    # and set any options; do chmod last to preserve setuid bits.
456516e9f99Smrg    #
457516e9f99Smrg    # If any of these fail, we abort the whole thing.  If we want to
458516e9f99Smrg    # ignore errors from any of these, just make sure not to ignore
459516e9f99Smrg    # errors from the above "$doit $cpprog $src $dsttmp" command.
460516e9f99Smrg    #
461516e9f99Smrg    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
462516e9f99Smrg    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
463516e9f99Smrg    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
464516e9f99Smrg    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
465516e9f99Smrg
466516e9f99Smrg    # If -C, don't bother to copy if it wouldn't change the file.
467516e9f99Smrg    if $copy_on_change &&
468516e9f99Smrg       old=`LC_ALL=C ls -dlL "$dst"	2>/dev/null` &&
469516e9f99Smrg       new=`LC_ALL=C ls -dlL "$dsttmp"	2>/dev/null` &&
470516e9f99Smrg
471516e9f99Smrg       eval "$initialize_posix_glob" &&
472516e9f99Smrg       $posix_glob set -f &&
473516e9f99Smrg       set X $old && old=:$2:$4:$5:$6 &&
474516e9f99Smrg       set X $new && new=:$2:$4:$5:$6 &&
475516e9f99Smrg       $posix_glob set +f &&
476516e9f99Smrg
477516e9f99Smrg       test "$old" = "$new" &&
478516e9f99Smrg       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
479516e9f99Smrg    then
480516e9f99Smrg      rm -f "$dsttmp"
481516e9f99Smrg    else
482516e9f99Smrg      # Rename the file to the real destination.
483516e9f99Smrg      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
484516e9f99Smrg
485516e9f99Smrg      # The rename failed, perhaps because mv can't rename something else
486516e9f99Smrg      # to itself, or perhaps because mv is so ancient that it does not
487516e9f99Smrg      # support -f.
488516e9f99Smrg      {
489516e9f99Smrg	# Now remove or move aside any old file at destination location.
490516e9f99Smrg	# We try this two ways since rm can't unlink itself on some
491516e9f99Smrg	# systems and the destination file might be busy for other
492516e9f99Smrg	# reasons.  In this case, the final cleanup might fail but the new
493516e9f99Smrg	# file should still install successfully.
494516e9f99Smrg	{
495516e9f99Smrg	  test ! -f "$dst" ||
496516e9f99Smrg	  $doit $rmcmd -f "$dst" 2>/dev/null ||
497516e9f99Smrg	  { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
498516e9f99Smrg	    { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }
499516e9f99Smrg	  } ||
500516e9f99Smrg	  { echo "$0: cannot unlink or rename $dst" >&2
501516e9f99Smrg	    (exit 1); exit 1
502516e9f99Smrg	  }
503516e9f99Smrg	} &&
504516e9f99Smrg
505516e9f99Smrg	# Now rename the file to the real destination.
506516e9f99Smrg	$doit $mvcmd "$dsttmp" "$dst"
507516e9f99Smrg      }
508516e9f99Smrg    fi || exit 1
509516e9f99Smrg
510516e9f99Smrg    trap '' 0
511516e9f99Smrg  fi
512516e9f99Smrgdone
51308f3b10eSmrg
514516e9f99Smrg# Local variables:
515516e9f99Smrg# eval: (add-hook 'write-file-hooks 'time-stamp)
516516e9f99Smrg# time-stamp-start: "scriptversion="
517516e9f99Smrg# time-stamp-format: "%:y-%02m-%02d.%02H"
518516e9f99Smrg# time-stamp-time-zone: "UTC"
519516e9f99Smrg# time-stamp-end: "; # UTC"
520516e9f99Smrg# End:
521