install-sh - third_party/libpng - Git at Google

 #!/bin/sh
 # install - install a program, script, or datafile

 scriptversion=2023-11-23.18; # UTC

 # This originates from X11R5 (mit/util/scripts/install.sh), which was
 # later released in X11R6 (xc/config/util/install.sh) with the
 # following copyright and license.
 #
 # Copyright (C) 1994 X Consortium
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to
 # deal in the Software without restriction, including without limitation the
 # rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 # sell copies of the Software, and to permit persons to whom the Software is
 # furnished to do so, subject to the following conditions:
 #
 # The above copyright notice and this permission notice shall be included in
 # all copies or substantial portions of the Software.
 #
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 # X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 # AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
 # TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #
 # Except as contained in this notice, the name of the X Consortium shall not
 # be used in advertising or otherwise to promote the sale, use or other deal-
 # ings in this Software without prior written authorization from the X Consor-
 # tium.
 #
 #
 # FSF changes to this file are in the public domain.
 #
 # Calling this script install-sh is preferred over install.sh, to prevent
 # 'make' implicit rules from creating a file called install from it
 # when there is no Makefile.
 #
 # This script is compatible with the BSD install script, but was written
 # from scratch.

 tab='	'
 nl='
 '
 IFS=" $tab$nl"

 # Set DOITPROG to "echo" to test this script.

 doit=${DOITPROG-}
 doit_exec=${doit:-exec}

 # Put in absolute file names if you don't have them in your path;
 # or use environment vars.

 chgrpprog=${CHGRPPROG-chgrp}
 chmodprog=${CHMODPROG-chmod}
 chownprog=${CHOWNPROG-chown}
 cmpprog=${CMPPROG-cmp}
 cpprog=${CPPROG-cp}
 mkdirprog=${MKDIRPROG-mkdir}
 mvprog=${MVPROG-mv}
 rmprog=${RMPROG-rm}
 stripprog=${STRIPPROG-strip}

 posix_mkdir=

 # Desired mode of installed file.
 mode=0755

 # Create dirs (including intermediate dirs) using mode 755.
 # This is like GNU 'install' as of coreutils 8.32 (2020).
 mkdir_umask=22

 backupsuffix=
 chgrpcmd=
 chmodcmd=$chmodprog
 chowncmd=
 mvcmd=$mvprog
 rmcmd="$rmprog -f"
 stripcmd=

 src=
 dst=
 dir_arg=
 dst_arg=

 copy_on_change=false
 is_target_a_directory=possibly

 usage="\
 Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
    or: $0 [OPTION]... SRCFILES... DIRECTORY
    or: $0 [OPTION]... -t DIRECTORY SRCFILES...
    or: $0 [OPTION]... -d DIRECTORIES...

 In the 1st form, copy SRCFILE to DSTFILE.
 In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
 In the 4th, create DIRECTORIES.

 Options:
      --help     display this help and exit.
      --version  display version info and exit.

   -c            (ignored)
   -C            install only if different (preserve data modification time)
   -d            create directories instead of installing files.
   -g GROUP      $chgrpprog installed files to GROUP.
   -m MODE       $chmodprog installed files to MODE.
   -o USER       $chownprog installed files to USER.
   -p            pass -p to $cpprog.
   -s            $stripprog installed files.
   -S SUFFIX     attempt to back up existing files, with suffix SUFFIX.
   -t DIRECTORY  install into DIRECTORY.
   -T            report an error if DSTFILE is a directory.

 Environment variables override the default commands:
   CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
   RMPROG STRIPPROG

 By default, rm is invoked with -f; when overridden with RMPROG,
 it's up to you to specify -f if you want it.

 If -S is not specified, no backups are attempted.

 Report bugs to <bug-automake@gnu.org>.
 GNU Automake home page: <https://www.gnu.org/software/automake/>.
 General help using GNU software: <https://www.gnu.org/gethelp/>."

 while test $# -ne 0; do
   case $1 in
     -c) ;;

     -C) copy_on_change=true;;

     -d) dir_arg=true;;

     -g) chgrpcmd="$chgrpprog $2"
         shift;;

     --help) echo "$usage"; exit $?;;

     -m) mode=$2
         case $mode in
           *' '* | *"$tab"* | *"$nl"* | *'*'* | *'?'* | *'['*)
             echo "$0: invalid mode: $mode" >&2
             exit 1;;
         esac
         shift;;

     -o) chowncmd="$chownprog $2"
         shift;;

     -p) cpprog="$cpprog -p";;

     -s) stripcmd=$stripprog;;

     -S) backupsuffix="$2"
         shift;;

     -t)
         is_target_a_directory=always
         dst_arg=$2
         # Protect names problematic for 'test' and other utilities.
         case $dst_arg in
           -* | [=\(\)!]) dst_arg=./$dst_arg;;
         esac
         shift;;

     -T) is_target_a_directory=never;;

     --version) echo "$0 $scriptversion"; exit $?;;

     --) shift
         break;;

     -*) echo "$0: invalid option: $1" >&2
         exit 1;;

     *)  break;;
   esac
   shift
 done

 # We allow the use of options -d and -T together, by making -d
 # take the precedence; this is for compatibility with GNU install.

 if test -n "$dir_arg"; then
   if test -n "$dst_arg"; then
     echo "$0: target directory not allowed when installing a directory." >&2
     exit 1
   fi
 fi

 if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
   # When -d is used, all remaining arguments are directories to create.
   # When -t is used, the destination is already specified.
   # Otherwise, the last argument is the destination.  Remove it from $@.
   for arg
   do
     if test -n "$dst_arg"; then
       # $@ is not empty: it contains at least $arg.
       set fnord "$@" "$dst_arg"
       shift # fnord
     fi
     shift # arg
     dst_arg=$arg
     # Protect names problematic for 'test' and other utilities.
     case $dst_arg in
       -* | [=\(\)!]) dst_arg=./$dst_arg;;
     esac
   done
 fi

 if test $# -eq 0; then
   if test -z "$dir_arg"; then
     echo "$0: no input file specified." >&2
     exit 1
   fi
   # It's OK to call 'install-sh -d' without argument.
   # This can happen when creating conditional directories.
   exit 0
 fi

 if test -z "$dir_arg"; then
   if test $# -gt 1 || test "$is_target_a_directory" = always; then
     if test ! -d "$dst_arg"; then
       echo "$0: $dst_arg: Is not a directory." >&2
       exit 1
     fi
   fi
 fi

 if test -z "$dir_arg"; then
   do_exit='(exit $ret); exit $ret'
   trap "ret=129; $do_exit" 1
   trap "ret=130; $do_exit" 2
   trap "ret=141; $do_exit" 13
   trap "ret=143; $do_exit" 15

   # Set umask so as not to create temps with too-generous modes.
   # However, 'strip' requires both read and write access to temps.
   case $mode in
     # Optimize common cases.
     *644) cp_umask=133;;
     *755) cp_umask=22;;

     *[0-7])
       if test -z "$stripcmd"; then
         u_plus_rw=
       else
         u_plus_rw='% 200'
       fi
       cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
     *)
       if test -z "$stripcmd"; then
         u_plus_rw=
       else
         u_plus_rw=,u+rw
       fi
       cp_umask=$mode$u_plus_rw;;
   esac
 fi

 for src
 do
   # Protect names problematic for 'test' and other utilities.
   case $src in
     -* | [=\(\)!]) src=./$src;;
   esac

   if test -n "$dir_arg"; then
     dst=$src
     dstdir=$dst
     test -d "$dstdir"
     dstdir_status=$?
     # Don't chown directories that already exist.
     if test $dstdir_status = 0; then
       chowncmd=""
     fi
   else

     # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
     # might cause directories to be created, which would be especially bad
     # if $src (and thus $dsttmp) contains '*'.
     if test ! -f "$src" && test ! -d "$src"; then
       echo "$0: $src does not exist." >&2
       exit 1
     fi

     if test -z "$dst_arg"; then
       echo "$0: no destination specified." >&2
       exit 1
     fi
     dst=$dst_arg

     # If destination is a directory, append the input filename.
     if test -d "$dst"; then
       if test "$is_target_a_directory" = never; then
         echo "$0: $dst_arg: Is a directory" >&2
         exit 1
       fi
       dstdir=$dst
       dstbase=`basename "$src"`
       case $dst in
 	*/) dst=$dst$dstbase;;
 	*)  dst=$dst/$dstbase;;
       esac
       dstdir_status=0
     else
       dstdir=`dirname "$dst"`
       test -d "$dstdir"
       dstdir_status=$?
     fi
   fi

   case $dstdir in
     */) dstdirslash=$dstdir;;
     *)  dstdirslash=$dstdir/;;
   esac

   obsolete_mkdir_used=false

   if test $dstdir_status != 0; then
     case $posix_mkdir in
       '')
         # With -d, create the new directory with the user-specified mode.
         # Otherwise, rely on $mkdir_umask.
         if test -n "$dir_arg"; then
           mkdir_mode=-m$mode
         else
           mkdir_mode=
         fi

         posix_mkdir=false
 	# The $RANDOM variable is not portable (e.g., dash).  Use it
 	# here however when possible just to lower collision chance.
 	tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$

 	trap '
 	  ret=$?
 	  rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir" 2>/dev/null
 	  exit $ret
 	' 0

 	# Because "mkdir -p" follows existing symlinks and we likely work
 	# directly in world-writeable /tmp, make sure that the '$tmpdir'
 	# directory is successfully created first before we actually test
 	# 'mkdir -p'.
 	if (umask $mkdir_umask &&
 	    $mkdirprog $mkdir_mode "$tmpdir" &&
 	    exec $mkdirprog $mkdir_mode -p -- "$tmpdir/a/b") >/dev/null 2>&1
 	then
 	  if test -z "$dir_arg" || {
 	       # Check for POSIX incompatibilities with -m.
 	       # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
 	       # other-writable bit of parent directory when it shouldn't.
 	       # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
 	       test_tmpdir="$tmpdir/a"
 	       ls_ld_tmpdir=`ls -ld "$test_tmpdir"`
 	       case $ls_ld_tmpdir in
 		 d????-?r-*) different_mode=700;;
 		 d????-?--*) different_mode=755;;
 		 *) false;;
 	       esac &&
 	       $mkdirprog -m$different_mode -p -- "$test_tmpdir" && {
 		 ls_ld_tmpdir_1=`ls -ld "$test_tmpdir"`
 		 test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
 	       }
 	     }
 	  then posix_mkdir=:
 	  fi
 	  rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir"
 	else
 	  # Remove any dirs left behind by ancient mkdir implementations.
 	  rmdir ./$mkdir_mode ./-p ./-- "$tmpdir" 2>/dev/null
 	fi
 	trap '' 0;;
     esac

     if
       $posix_mkdir && (
         umask $mkdir_umask &&
         $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
       )
     then :
     else

       # mkdir does not conform to POSIX,
       # or it failed possibly due to a race condition.  Create the
       # directory the slow way, step by step, checking for races as we go.

       case $dstdir in
         /*) prefix='/';;
         [-=\(\)!]*) prefix='./';;
         *)  prefix='';;
       esac

       oIFS=$IFS
       IFS=/
       set -f
       set fnord $dstdir
       shift
       set +f
       IFS=$oIFS

       prefixes=

       for d
       do
         test X"$d" = X && continue

         prefix=$prefix$d
         if test -d "$prefix"; then
           prefixes=
         else
           if $posix_mkdir; then
             (umask $mkdir_umask &&
              $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
             # Don't fail if two instances are running concurrently.
             test -d "$prefix" || exit 1
           else
             case $prefix in
               *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
               *) qprefix=$prefix;;
             esac
             prefixes="$prefixes '$qprefix'"
           fi
         fi
         prefix=$prefix/
       done

       if test -n "$prefixes"; then
         # Don't fail if two instances are running concurrently.
         (umask $mkdir_umask &&
          eval "\$doit_exec \$mkdirprog $prefixes") ||
           test -d "$dstdir" || exit 1
         obsolete_mkdir_used=true
       fi
     fi
   fi

   if test -n "$dir_arg"; then
     { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
     { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
     { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
       test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
   else

     # Make a couple of temp file names in the proper directory.
     dsttmp=${dstdirslash}_inst.$$_
     rmtmp=${dstdirslash}_rm.$$_

     # Trap to clean up those temp files at exit.
     trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0

     # Copy the file name to the temp name.
     (umask $cp_umask &&
      { test -z "$stripcmd" || {
 	 # Create $dsttmp read-write so that cp doesn't create it read-only,
 	 # which would cause strip to fail.
 	 if test -z "$doit"; then
 	   : >"$dsttmp" # No need to fork-exec 'touch'.
 	 else
 	   $doit touch "$dsttmp"
 	 fi
        }
      } &&
      $doit_exec $cpprog "$src" "$dsttmp") &&

     # and set any options; do chmod last to preserve setuid bits.
     #
     # If any of these fail, we abort the whole thing.  If we want to
     # ignore errors from any of these, just make sure not to ignore
     # errors from the above "$doit $cpprog $src $dsttmp" command.
     #
     { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
     { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
     { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
     { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&

     # If -C, don't bother to copy if it wouldn't change the file.
     if $copy_on_change &&
        old=`LC_ALL=C ls -dlL "$dst"     2>/dev/null` &&
        new=`LC_ALL=C ls -dlL "$dsttmp"  2>/dev/null` &&
        set -f &&
        set X $old && old=:$2:$4:$5:$6 &&
        set X $new && new=:$2:$4:$5:$6 &&
        set +f &&
        test "$old" = "$new" &&
        $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
     then
       rm -f "$dsttmp"
     else
       # If $backupsuffix is set, and the file being installed
       # already exists, attempt a backup.  Don't worry if it fails,
       # e.g., if mv doesn't support -f.
       if test -n "$backupsuffix" && test -f "$dst"; then
         $doit $mvcmd -f "$dst" "$dst$backupsuffix" 2>/dev/null
       fi

       # Rename the file to the real destination.
       $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||

       # The rename failed, perhaps because mv can't rename something else
       # to itself, or perhaps because mv is so ancient that it does not
       # support -f.
       {
         # Now remove or move aside any old file at destination location.
         # We try this two ways since rm can't unlink itself on some
         # systems and the destination file might be busy for other
         # reasons.  In this case, the final cleanup might fail but the new
         # file should still install successfully.
         {
           test ! -f "$dst" ||
           $doit $rmcmd "$dst" 2>/dev/null ||
           { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
             { $doit $rmcmd "$rmtmp" 2>/dev/null; :; }
           } ||
           { echo "$0: cannot unlink or rename $dst" >&2
             (exit 1); exit 1
           }
         } &&

         # Now rename the file to the real destination.
         $doit $mvcmd "$dsttmp" "$dst"
       }
     fi || exit 1

     trap '' 0
   fi
 done

 # Local variables:
 # eval: (add-hook 'before-save-hook 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
 # time-stamp-time-zone: "UTC0"
 # time-stamp-end: "; # UTC"
 # End:
	#!/bin/sh
	# install - install a program, script, or datafile

	scriptversion=2023-11-23.18; # UTC

	# This originates from X11R5 (mit/util/scripts/install.sh), which was
	# later released in X11R6 (xc/config/util/install.sh) with the
	# following copyright and license.
	#
	# Copyright (C) 1994 X Consortium
	#
	# Permission is hereby granted, free of charge, to any person obtaining a copy
	# of this software and associated documentation files (the "Software"), to
	# deal in the Software without restriction, including without limitation the
	# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
	# sell copies of the Software, and to permit persons to whom the Software is
	# furnished to do so, subject to the following conditions:
	#
	# The above copyright notice and this permission notice shall be included in
	# all copies or substantial portions of the Software.
	#
	# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
	# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
	# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	#
	# Except as contained in this notice, the name of the X Consortium shall not
	# be used in advertising or otherwise to promote the sale, use or other deal-
	# ings in this Software without prior written authorization from the X Consor-
	# tium.
	#
	#
	# FSF changes to this file are in the public domain.
	#
	# Calling this script install-sh is preferred over install.sh, to prevent
	# 'make' implicit rules from creating a file called install from it
	# when there is no Makefile.
	#
	# This script is compatible with the BSD install script, but was written
	# from scratch.

	tab=' '
	nl='
	'
	IFS=" $tab$nl"

	# Set DOITPROG to "echo" to test this script.

	doit=${DOITPROG-}
	doit_exec=${doit:-exec}

	# Put in absolute file names if you don't have them in your path;
	# or use environment vars.

	chgrpprog=${CHGRPPROG-chgrp}
	chmodprog=${CHMODPROG-chmod}
	chownprog=${CHOWNPROG-chown}
	cmpprog=${CMPPROG-cmp}
	cpprog=${CPPROG-cp}
	mkdirprog=${MKDIRPROG-mkdir}
	mvprog=${MVPROG-mv}
	rmprog=${RMPROG-rm}
	stripprog=${STRIPPROG-strip}

	posix_mkdir=

	# Desired mode of installed file.
	mode=0755

	# Create dirs (including intermediate dirs) using mode 755.
	# This is like GNU 'install' as of coreutils 8.32 (2020).
	mkdir_umask=22

	backupsuffix=
	chgrpcmd=
	chmodcmd=$chmodprog
	chowncmd=
	mvcmd=$mvprog
	rmcmd="$rmprog -f"
	stripcmd=

	src=
	dst=
	dir_arg=
	dst_arg=

	copy_on_change=false
	is_target_a_directory=possibly

	usage="\
	Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
	or: $0 [OPTION]... SRCFILES... DIRECTORY
	or: $0 [OPTION]... -t DIRECTORY SRCFILES...
	or: $0 [OPTION]... -d DIRECTORIES...

	In the 1st form, copy SRCFILE to DSTFILE.
	In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
	In the 4th, create DIRECTORIES.

	Options:
	--help display this help and exit.
	--version display version info and exit.

	-c (ignored)
	-C install only if different (preserve data modification time)
	-d create directories instead of installing files.
	-g GROUP $chgrpprog installed files to GROUP.
	-m MODE $chmodprog installed files to MODE.
	-o USER $chownprog installed files to USER.
	-p pass -p to $cpprog.
	-s $stripprog installed files.
	-S SUFFIX attempt to back up existing files, with suffix SUFFIX.
	-t DIRECTORY install into DIRECTORY.
	-T report an error if DSTFILE is a directory.

	Environment variables override the default commands:
	CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
	RMPROG STRIPPROG

	By default, rm is invoked with -f; when overridden with RMPROG,
	it's up to you to specify -f if you want it.

	If -S is not specified, no backups are attempted.

	Report bugs to <bug-automake@gnu.org>.
	GNU Automake home page: <https://www.gnu.org/software/automake/>.
	General help using GNU software: <https://www.gnu.org/gethelp/>."

	while test $# -ne 0; do
	case $1 in
	-c) ;;

	-C) copy_on_change=true;;

	-d) dir_arg=true;;

	-g) chgrpcmd="$chgrpprog $2"
	shift;;

	--help) echo "$usage"; exit $?;;

	-m) mode=$2
	case $mode in
	' ' \| "$tab" \| "$nl" \| ''* \| '?' \| '[')
	echo "$0: invalid mode: $mode" >&2
	exit 1;;
	esac
	shift;;

	-o) chowncmd="$chownprog $2"
	shift;;

	-p) cpprog="$cpprog -p";;

	-s) stripcmd=$stripprog;;

	-S) backupsuffix="$2"
	shift;;

	-t)
	is_target_a_directory=always
	dst_arg=$2
	# Protect names problematic for 'test' and other utilities.
	case $dst_arg in
	-* \| [=\(\)!]) dst_arg=./$dst_arg;;
	esac
	shift;;

	-T) is_target_a_directory=never;;

	--version) echo "$0 $scriptversion"; exit $?;;

	--) shift
	break;;

	-*) echo "$0: invalid option: $1" >&2
	exit 1;;

	*) break;;
	esac
	shift
	done

	# We allow the use of options -d and -T together, by making -d
	# take the precedence; this is for compatibility with GNU install.

	if test -n "$dir_arg"; then
	if test -n "$dst_arg"; then
	echo "$0: target directory not allowed when installing a directory." >&2
	exit 1
	fi
	fi

	if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
	# When -d is used, all remaining arguments are directories to create.
	# When -t is used, the destination is already specified.
	# Otherwise, the last argument is the destination. Remove it from $@.
	for arg
	do
	if test -n "$dst_arg"; then
	# $@ is not empty: it contains at least $arg.
	set fnord "$@" "$dst_arg"
	shift # fnord
	fi
	shift # arg
	dst_arg=$arg
	# Protect names problematic for 'test' and other utilities.
	case $dst_arg in
	-* \| [=\(\)!]) dst_arg=./$dst_arg;;
	esac
	done
	fi

	if test $# -eq 0; then
	if test -z "$dir_arg"; then
	echo "$0: no input file specified." >&2
	exit 1
	fi
	# It's OK to call 'install-sh -d' without argument.
	# This can happen when creating conditional directories.
	exit 0
	fi

	if test -z "$dir_arg"; then
	if test $# -gt 1 \|\| test "$is_target_a_directory" = always; then
	if test ! -d "$dst_arg"; then
	echo "$0: $dst_arg: Is not a directory." >&2
	exit 1
	fi
	fi
	fi

	if test -z "$dir_arg"; then
	do_exit='(exit $ret); exit $ret'
	trap "ret=129; $do_exit" 1
	trap "ret=130; $do_exit" 2
	trap "ret=141; $do_exit" 13
	trap "ret=143; $do_exit" 15

	# Set umask so as not to create temps with too-generous modes.
	# However, 'strip' requires both read and write access to temps.
	case $mode in
	# Optimize common cases.
	*644) cp_umask=133;;
	*755) cp_umask=22;;

	*[0-7])
	if test -z "$stripcmd"; then
	u_plus_rw=
	else
	u_plus_rw='% 200'
	fi
	cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
	*)
	if test -z "$stripcmd"; then
	u_plus_rw=
	else
	u_plus_rw=,u+rw
	fi
	cp_umask=$mode$u_plus_rw;;
	esac
	fi

	for src
	do
	# Protect names problematic for 'test' and other utilities.
	case $src in
	-* \| [=\(\)!]) src=./$src;;
	esac

	if test -n "$dir_arg"; then
	dst=$src
	dstdir=$dst
	test -d "$dstdir"
	dstdir_status=$?
	# Don't chown directories that already exist.
	if test $dstdir_status = 0; then
	chowncmd=""
	fi
	else

	# Waiting for this to be detected by the "$cpprog $src $dsttmp" command
	# might cause directories to be created, which would be especially bad
	# if $src (and thus $dsttmp) contains '*'.
	if test ! -f "$src" && test ! -d "$src"; then
	echo "$0: $src does not exist." >&2
	exit 1
	fi

	if test -z "$dst_arg"; then
	echo "$0: no destination specified." >&2
	exit 1
	fi
	dst=$dst_arg

	# If destination is a directory, append the input filename.
	if test -d "$dst"; then
	if test "$is_target_a_directory" = never; then
	echo "$0: $dst_arg: Is a directory" >&2
	exit 1
	fi
	dstdir=$dst
	dstbase=`basename "$src"`
	case $dst in
	*/) dst=$dst$dstbase;;
	*) dst=$dst/$dstbase;;
	esac
	dstdir_status=0
	else
	dstdir=`dirname "$dst"`
	test -d "$dstdir"
	dstdir_status=$?
	fi
	fi

	case $dstdir in
	*/) dstdirslash=$dstdir;;
	*) dstdirslash=$dstdir/;;
	esac

	obsolete_mkdir_used=false

	if test $dstdir_status != 0; then
	case $posix_mkdir in
	'')
	# With -d, create the new directory with the user-specified mode.
	# Otherwise, rely on $mkdir_umask.
	if test -n "$dir_arg"; then
	mkdir_mode=-m$mode
	else
	mkdir_mode=
	fi

	posix_mkdir=false
	# The $RANDOM variable is not portable (e.g., dash). Use it
	# here however when possible just to lower collision chance.
	tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$

	trap '
	ret=$?
	rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir" 2>/dev/null
	exit $ret
	' 0

	# Because "mkdir -p" follows existing symlinks and we likely work
	# directly in world-writeable /tmp, make sure that the '$tmpdir'
	# directory is successfully created first before we actually test
	# 'mkdir -p'.
	if (umask $mkdir_umask &&
	$mkdirprog $mkdir_mode "$tmpdir" &&
	exec $mkdirprog $mkdir_mode -p -- "$tmpdir/a/b") >/dev/null 2>&1
	then
	if test -z "$dir_arg" \|\| {
	# Check for POSIX incompatibilities with -m.
	# HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
	# other-writable bit of parent directory when it shouldn't.
	# FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
	test_tmpdir="$tmpdir/a"
	ls_ld_tmpdir=`ls -ld "$test_tmpdir"`
	case $ls_ld_tmpdir in
	d????-?r-*) different_mode=700;;
	d????-?--*) different_mode=755;;
	*) false;;
	esac &&
	$mkdirprog -m$different_mode -p -- "$test_tmpdir" && {
	ls_ld_tmpdir_1=`ls -ld "$test_tmpdir"`
	test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
	}
	}
	then posix_mkdir=:
	fi
	rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir"
	else
	# Remove any dirs left behind by ancient mkdir implementations.
	rmdir ./$mkdir_mode ./-p ./-- "$tmpdir" 2>/dev/null
	fi
	trap '' 0;;
	esac

	if
	$posix_mkdir && (
	umask $mkdir_umask &&
	$doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
	)
	then :
	else

	# mkdir does not conform to POSIX,
	# or it failed possibly due to a race condition. Create the
	# directory the slow way, step by step, checking for races as we go.

	case $dstdir in
	/*) prefix='/';;
	[-=\(\)!]*) prefix='./';;
	*) prefix='';;
	esac

	oIFS=$IFS
	IFS=/
	set -f
	set fnord $dstdir
	shift
	set +f
	IFS=$oIFS

	prefixes=

	for d
	do
	test X"$d" = X && continue

	prefix=$prefix$d
	if test -d "$prefix"; then
	prefixes=
	else
	if $posix_mkdir; then
	(umask $mkdir_umask &&
	$doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
	# Don't fail if two instances are running concurrently.
	test -d "$prefix" \|\| exit 1
	else
	case $prefix in
	\') qprefix=`echo "$prefix" \| sed "s/'/'\\\\\\\\''/g"`;;
	*) qprefix=$prefix;;
	esac
	prefixes="$prefixes '$qprefix'"
	fi
	fi
	prefix=$prefix/
	done

	if test -n "$prefixes"; then
	# Don't fail if two instances are running concurrently.
	(umask $mkdir_umask &&
	eval "\$doit_exec \$mkdirprog $prefixes") \|\|
	test -d "$dstdir" \|\| exit 1
	obsolete_mkdir_used=true
	fi
	fi
	fi

	if test -n "$dir_arg"; then
	{ test -z "$chowncmd" \|\| $doit $chowncmd "$dst"; } &&
	{ test -z "$chgrpcmd" \|\| $doit $chgrpcmd "$dst"; } &&
	{ test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false \|\|
	test -z "$chmodcmd" \|\| $doit $chmodcmd $mode "$dst"; } \|\| exit 1
	else

	# Make a couple of temp file names in the proper directory.
	dsttmp=${dstdirslash}_inst.$$_
	rmtmp=${dstdirslash}_rm.$$_

	# Trap to clean up those temp files at exit.
	trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0

	# Copy the file name to the temp name.
	(umask $cp_umask &&
	{ test -z "$stripcmd" \|\| {
	# Create $dsttmp read-write so that cp doesn't create it read-only,
	# which would cause strip to fail.
	if test -z "$doit"; then
	: >"$dsttmp" # No need to fork-exec 'touch'.
	else
	$doit touch "$dsttmp"
	fi
	}
	} &&
	$doit_exec $cpprog "$src" "$dsttmp") &&

	# and set any options; do chmod last to preserve setuid bits.
	#
	# If any of these fail, we abort the whole thing. If we want to
	# ignore errors from any of these, just make sure not to ignore
	# errors from the above "$doit $cpprog $src $dsttmp" command.
	#
	{ test -z "$chowncmd" \|\| $doit $chowncmd "$dsttmp"; } &&
	{ test -z "$chgrpcmd" \|\| $doit $chgrpcmd "$dsttmp"; } &&
	{ test -z "$stripcmd" \|\| $doit $stripcmd "$dsttmp"; } &&
	{ test -z "$chmodcmd" \|\| $doit $chmodcmd $mode "$dsttmp"; } &&

	# If -C, don't bother to copy if it wouldn't change the file.
	if $copy_on_change &&
	old=`LC_ALL=C ls -dlL "$dst" 2>/dev/null` &&
	new=`LC_ALL=C ls -dlL "$dsttmp" 2>/dev/null` &&
	set -f &&
	set X $old && old=:$2:$4:$5:$6 &&
	set X $new && new=:$2:$4:$5:$6 &&
	set +f &&
	test "$old" = "$new" &&
	$cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
	then
	rm -f "$dsttmp"
	else
	# If $backupsuffix is set, and the file being installed
	# already exists, attempt a backup. Don't worry if it fails,
	# e.g., if mv doesn't support -f.
	if test -n "$backupsuffix" && test -f "$dst"; then
	$doit $mvcmd -f "$dst" "$dst$backupsuffix" 2>/dev/null
	fi

	# Rename the file to the real destination.
	$doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null \|\|

	# The rename failed, perhaps because mv can't rename something else
	# to itself, or perhaps because mv is so ancient that it does not
	# support -f.
	{
	# Now remove or move aside any old file at destination location.
	# We try this two ways since rm can't unlink itself on some
	# systems and the destination file might be busy for other
	# reasons. In this case, the final cleanup might fail but the new
	# file should still install successfully.
	{
	test ! -f "$dst" \|\|
	$doit $rmcmd "$dst" 2>/dev/null \|\|
	{ $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
	{ $doit $rmcmd "$rmtmp" 2>/dev/null; :; }
	} \|\|
	{ echo "$0: cannot unlink or rename $dst" >&2
	(exit 1); exit 1
	}
	} &&

	# Now rename the file to the real destination.
	$doit $mvcmd "$dsttmp" "$dst"
	}
	fi \|\| exit 1

	trap '' 0
	fi
	done

	# Local variables:
	# eval: (add-hook 'before-save-hook 'time-stamp)
	# time-stamp-start: "scriptversion="
	# time-stamp-format: "%:y-%02m-%02d.%02H"
	# time-stamp-time-zone: "UTC0"
	# time-stamp-end: "; # UTC"
	# End: